ffmpeg: avoid bogus error with "test.flac -c copy -f null -"
[ffmpeg.git] / ffmpeg.c
1 /*
2  * Copyright (c) 2000-2003 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 /**
22  * @file
23  * multimedia converter based on the FFmpeg libraries
24  */
25
26 #include "config.h"
27 #include <ctype.h>
28 #include <string.h>
29 #include <math.h>
30 #include <stdlib.h>
31 #include <errno.h>
32 #include <signal.h>
33 #include <limits.h>
34 #if HAVE_ISATTY
35 #include <unistd.h>
36 #endif
37 #include "libavformat/avformat.h"
38 #include "libavdevice/avdevice.h"
39 #include "libswscale/swscale.h"
40 #include "libswresample/swresample.h"
41 #include "libavutil/opt.h"
42 #include "libavutil/audioconvert.h"
43 #include "libavutil/parseutils.h"
44 #include "libavutil/samplefmt.h"
45 #include "libavutil/colorspace.h"
46 #include "libavutil/fifo.h"
47 #include "libavutil/intreadwrite.h"
48 #include "libavutil/dict.h"
49 #include "libavutil/mathematics.h"
50 #include "libavutil/pixdesc.h"
51 #include "libavutil/avstring.h"
52 #include "libavutil/libm.h"
53 #include "libavutil/imgutils.h"
54 #include "libavutil/timestamp.h"
55 #include "libavutil/bprint.h"
56 #include "libavutil/time.h"
57 #include "libavformat/os_support.h"
58
59 #include "libavformat/ffm.h" // not public API
60
61 # include "libavfilter/avcodec.h"
62 # include "libavfilter/avfilter.h"
63 # include "libavfilter/avfiltergraph.h"
64 # include "libavfilter/buffersrc.h"
65 # include "libavfilter/buffersink.h"
66
67 #if HAVE_SYS_RESOURCE_H
68 #include <sys/types.h>
69 #include <sys/resource.h>
70 #elif HAVE_GETPROCESSTIMES
71 #include <windows.h>
72 #endif
73 #if HAVE_GETPROCESSMEMORYINFO
74 #include <windows.h>
75 #include <psapi.h>
76 #endif
77
78 #if HAVE_SYS_SELECT_H
79 #include <sys/select.h>
80 #endif
81
82 #if HAVE_TERMIOS_H
83 #include <fcntl.h>
84 #include <sys/ioctl.h>
85 #include <sys/time.h>
86 #include <termios.h>
87 #elif HAVE_KBHIT
88 #include <conio.h>
89 #endif
90
91 #if HAVE_PTHREADS
92 #include <pthread.h>
93 #endif
94
95 #include <time.h>
96
97 #include "cmdutils.h"
98
99 #include "libavutil/avassert.h"
100
101 #define VSYNC_AUTO       -1
102 #define VSYNC_PASSTHROUGH 0
103 #define VSYNC_CFR         1
104 #define VSYNC_VFR         2
105 #define VSYNC_DROP        0xff
106
107 const char program_name[] = "ffmpeg";
108 const int program_birth_year = 2000;
109
110 /* select an input stream for an output stream */
111 typedef struct StreamMap {
112     int disabled;           /** 1 is this mapping is disabled by a negative map */
113     int file_index;
114     int stream_index;
115     int sync_file_index;
116     int sync_stream_index;
117     char *linklabel;       /** name of an output link, for mapping lavfi outputs */
118 } StreamMap;
119
120 typedef struct {
121     int  file_idx,  stream_idx,  channel_idx; // input
122     int ofile_idx, ostream_idx;               // output
123 } AudioChannelMap;
124
125 static const OptionDef *options;
126
127 #define MAX_STREAMS 1024    /* arbitrary sanity check value */
128
129 static int frame_bits_per_raw_sample = 0;
130 static int video_discard = 0;
131 static int same_quant = 0;
132 static int do_deinterlace = 0;
133 static int intra_dc_precision = 8;
134 static int qp_hist = 0;
135 static int intra_only = 0;
136 static const char *video_codec_name    = NULL;
137 static const char *audio_codec_name    = NULL;
138 static const char *subtitle_codec_name = NULL;
139
140 static int file_overwrite = 0;
141 static int no_file_overwrite = 0;
142 static int do_benchmark = 0;
143 static int do_benchmark_all = 0;
144 static int do_hex_dump = 0;
145 static int do_pkt_dump = 0;
146 static int do_psnr = 0;
147 static int do_pass = 0;
148 static const char *pass_logfilename_prefix;
149 static int video_sync_method = VSYNC_AUTO;
150 static int audio_sync_method = 0;
151 static float audio_drift_threshold = 0.1;
152 static int copy_ts = 0;
153 static int copy_tb = -1;
154 static int opt_shortest = 0;
155 static char *vstats_filename;
156 static FILE *vstats_file;
157
158 static int audio_volume = 256;
159
160 static int exit_on_error = 0;
161 static int stdin_interaction = 1;
162 static int run_as_daemon  = 0;
163 static volatile int received_nb_signals = 0;
164 static int64_t video_size = 0;
165 static int64_t audio_size = 0;
166 static int64_t subtitle_size = 0;
167 static int64_t extra_size = 0;
168 static int nb_frames_dup = 0;
169 static int nb_frames_drop = 0;
170 static int input_sync;
171
172 static float dts_delta_threshold = 10;
173 static float dts_error_threshold = 3600*30;
174
175 static int print_stats = 1;
176 static int debug_ts = 0;
177 static int current_time;
178 static AVIOContext *progress_avio = NULL;
179
180 static uint8_t *subtitle_out;
181
182 #if HAVE_PTHREADS
183 /* signal to input threads that they should exit; set by the main thread */
184 static int transcoding_finished;
185 #endif
186
187 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
188
189 typedef struct InputFilter {
190     AVFilterContext    *filter;
191     struct InputStream *ist;
192     struct FilterGraph *graph;
193     uint8_t            *name;
194 } InputFilter;
195
196 typedef struct OutputFilter {
197     AVFilterContext     *filter;
198     struct OutputStream *ost;
199     struct FilterGraph  *graph;
200     uint8_t             *name;
201
202     /* temporary storage until stream maps are processed */
203     AVFilterInOut       *out_tmp;
204 } OutputFilter;
205
206 typedef struct FilterGraph {
207     int            index;
208     const char    *graph_desc;
209
210     AVFilterGraph *graph;
211
212     InputFilter   **inputs;
213     int          nb_inputs;
214     OutputFilter **outputs;
215     int         nb_outputs;
216 } FilterGraph;
217
218 typedef struct InputStream {
219     int file_index;
220     AVStream *st;
221     int discard;             /* true if stream data should be discarded */
222     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
223     AVCodec *dec;
224     AVFrame *decoded_frame;
225
226     int64_t       start;     /* time when read started */
227     /* predicted dts of the next packet read for this stream or (when there are
228      * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
229     int64_t       next_dts;
230     int64_t       dts;       ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
231
232     int64_t       next_pts;  ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
233     int64_t       pts;       ///< current pts of the decoded frame  (in AV_TIME_BASE units)
234     int           wrap_correction_done;
235     double ts_scale;
236     int is_start;            /* is 1 at the start and after a discontinuity */
237     int saw_first_ts;
238     int showed_multi_packet_warning;
239     AVDictionary *opts;
240     AVRational framerate;               /* framerate forced with -r */
241     int top_field_first;
242
243     int resample_height;
244     int resample_width;
245     int resample_pix_fmt;
246
247     int      resample_sample_fmt;
248     int      resample_sample_rate;
249     int      resample_channels;
250     uint64_t resample_channel_layout;
251
252     /* a pool of free buffers for decoded data */
253     FrameBuffer *buffer_pool;
254     int dr1;
255
256     /* decoded data from this stream goes into all those filters
257      * currently video and audio only */
258     InputFilter **filters;
259     int        nb_filters;
260 } InputStream;
261
262 typedef struct InputFile {
263     AVFormatContext *ctx;
264     int eof_reached;      /* true if eof reached */
265     int unavailable;      /* true if the file is unavailable (possibly temporarily) */
266     int ist_index;        /* index of first stream in input_streams */
267     int64_t ts_offset;
268     int nb_streams;       /* number of stream that ffmpeg is aware of; may be different
269                              from ctx.nb_streams if new streams appear during av_read_frame() */
270     int nb_streams_warn;  /* number of streams that the user was warned of */
271     int rate_emu;
272
273 #if HAVE_PTHREADS
274     pthread_t thread;           /* thread reading from this file */
275     int finished;               /* the thread has exited */
276     int joined;                 /* the thread has been joined */
277     pthread_mutex_t fifo_lock;  /* lock for access to fifo */
278     pthread_cond_t  fifo_cond;  /* the main thread will signal on this cond after reading from fifo */
279     AVFifoBuffer *fifo;         /* demuxed packets are stored here; freed by the main thread */
280 #endif
281 } InputFile;
282
283 typedef struct OutputStream {
284     int file_index;          /* file index */
285     int index;               /* stream index in the output file */
286     int source_index;        /* InputStream index */
287     AVStream *st;            /* stream in the output file */
288     int encoding_needed;     /* true if encoding needed for this stream */
289     int frame_number;
290     /* input pts and corresponding output pts
291        for A/V sync */
292     struct InputStream *sync_ist; /* input stream to sync against */
293     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
294     /* pts of the first frame encoded for this stream, used for limiting
295      * recording time */
296     int64_t first_pts;
297     AVBitStreamFilterContext *bitstream_filters;
298     AVCodec *enc;
299     int64_t max_frames;
300     AVFrame *filtered_frame;
301
302     /* video only */
303     AVRational frame_rate;
304     int force_fps;
305     int top_field_first;
306
307     float frame_aspect_ratio;
308     float last_quality;
309
310     /* forced key frames */
311     int64_t *forced_kf_pts;
312     int forced_kf_count;
313     int forced_kf_index;
314     char *forced_keyframes;
315
316     /* audio only */
317     int audio_channels_map[SWR_CH_MAX];  /* list of the channels id to pick from the source stream */
318     int audio_channels_mapped;           /* number of channels in audio_channels_map */
319
320     FILE *logfile;
321
322     OutputFilter *filter;
323     char *avfilter;
324
325     int64_t sws_flags;
326     int64_t swr_dither_method;
327     double swr_dither_scale;
328     AVDictionary *opts;
329     int is_past_recording_time;
330     int unavailable;  /* true if the steram is unavailable (possibly temporarily) */
331     int stream_copy;
332     const char *attachment_filename;
333     int copy_initial_nonkeyframes;
334
335     int keep_pix_fmt;
336 } OutputStream;
337
338
339 #if HAVE_TERMIOS_H
340
341 /* init terminal so that we can grab keys */
342 static struct termios oldtty;
343 static int restore_tty;
344 #endif
345
346 typedef struct OutputFile {
347     AVFormatContext *ctx;
348     AVDictionary *opts;
349     int ost_index;       /* index of the first stream in output_streams */
350     int64_t recording_time;  ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
351     int64_t start_time;      ///< start time in microseconds == AV_TIME_BASE units
352     uint64_t limit_filesize; /* filesize limit expressed in bytes */
353 } OutputFile;
354
355 static InputStream **input_streams = NULL;
356 static int        nb_input_streams = 0;
357 static InputFile   **input_files   = NULL;
358 static int        nb_input_files   = 0;
359
360 static OutputStream **output_streams = NULL;
361 static int         nb_output_streams = 0;
362 static OutputFile   **output_files   = NULL;
363 static int         nb_output_files   = 0;
364
365 static FilterGraph **filtergraphs;
366 int               nb_filtergraphs;
367
368 typedef struct OptionsContext {
369     /* input/output options */
370     int64_t start_time;
371     const char *format;
372
373     SpecifierOpt *codec_names;
374     int        nb_codec_names;
375     SpecifierOpt *audio_channels;
376     int        nb_audio_channels;
377     SpecifierOpt *audio_sample_rate;
378     int        nb_audio_sample_rate;
379     SpecifierOpt *frame_rates;
380     int        nb_frame_rates;
381     SpecifierOpt *frame_sizes;
382     int        nb_frame_sizes;
383     SpecifierOpt *frame_pix_fmts;
384     int        nb_frame_pix_fmts;
385
386     /* input options */
387     int64_t input_ts_offset;
388     int rate_emu;
389
390     SpecifierOpt *ts_scale;
391     int        nb_ts_scale;
392     SpecifierOpt *dump_attachment;
393     int        nb_dump_attachment;
394
395     /* output options */
396     StreamMap *stream_maps;
397     int     nb_stream_maps;
398     AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
399     int           nb_audio_channel_maps; /* number of (valid) -map_channel settings */
400     int metadata_global_manual;
401     int metadata_streams_manual;
402     int metadata_chapters_manual;
403     const char **attachments;
404     int       nb_attachments;
405
406     int chapters_input_file;
407
408     int64_t recording_time;
409     uint64_t limit_filesize;
410     float mux_preload;
411     float mux_max_delay;
412
413     int video_disable;
414     int audio_disable;
415     int subtitle_disable;
416     int data_disable;
417
418     /* indexed by output file stream index */
419     int   *streamid_map;
420     int nb_streamid_map;
421
422     SpecifierOpt *metadata;
423     int        nb_metadata;
424     SpecifierOpt *max_frames;
425     int        nb_max_frames;
426     SpecifierOpt *bitstream_filters;
427     int        nb_bitstream_filters;
428     SpecifierOpt *codec_tags;
429     int        nb_codec_tags;
430     SpecifierOpt *sample_fmts;
431     int        nb_sample_fmts;
432     SpecifierOpt *qscale;
433     int        nb_qscale;
434     SpecifierOpt *forced_key_frames;
435     int        nb_forced_key_frames;
436     SpecifierOpt *force_fps;
437     int        nb_force_fps;
438     SpecifierOpt *frame_aspect_ratios;
439     int        nb_frame_aspect_ratios;
440     SpecifierOpt *rc_overrides;
441     int        nb_rc_overrides;
442     SpecifierOpt *intra_matrices;
443     int        nb_intra_matrices;
444     SpecifierOpt *inter_matrices;
445     int        nb_inter_matrices;
446     SpecifierOpt *top_field_first;
447     int        nb_top_field_first;
448     SpecifierOpt *metadata_map;
449     int        nb_metadata_map;
450     SpecifierOpt *presets;
451     int        nb_presets;
452     SpecifierOpt *copy_initial_nonkeyframes;
453     int        nb_copy_initial_nonkeyframes;
454     SpecifierOpt *filters;
455     int        nb_filters;
456 } OptionsContext;
457
458 static void do_video_stats(AVFormatContext *os, OutputStream *ost, int frame_size);
459
460 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
461 {\
462     int i, ret;\
463     for (i = 0; i < o->nb_ ## name; i++) {\
464         char *spec = o->name[i].specifier;\
465         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
466             outvar = o->name[i].u.type;\
467         else if (ret < 0)\
468             exit_program(1);\
469     }\
470 }
471
472 static int64_t getutime(void)
473 {
474 #if HAVE_GETRUSAGE
475     struct rusage rusage;
476
477     getrusage(RUSAGE_SELF, &rusage);
478     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
479 #elif HAVE_GETPROCESSTIMES
480     HANDLE proc;
481     FILETIME c, e, k, u;
482     proc = GetCurrentProcess();
483     GetProcessTimes(proc, &c, &e, &k, &u);
484     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
485 #else
486     return av_gettime();
487 #endif
488 }
489
490 static void update_benchmark(const char *fmt, ...)
491 {
492     if (do_benchmark_all) {
493         int64_t t = getutime();
494         va_list va;
495         char buf[1024];
496
497         if (fmt) {
498             va_start(va, fmt);
499             vsnprintf(buf, sizeof(buf), fmt, va);
500             va_end(va);
501             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
502         }
503         current_time = t;
504     }
505 }
506
507 static void reset_options(OptionsContext *o, int is_input)
508 {
509     const OptionDef *po = options;
510     OptionsContext bak= *o;
511     int i;
512
513     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
514     while (po->name) {
515         void *dst = (uint8_t*)o + po->u.off;
516
517         if (po->flags & OPT_SPEC) {
518             SpecifierOpt **so = dst;
519             int i, *count = (int*)(so + 1);
520             for (i = 0; i < *count; i++) {
521                 av_freep(&(*so)[i].specifier);
522                 if (po->flags & OPT_STRING)
523                     av_freep(&(*so)[i].u.str);
524             }
525             av_freep(so);
526             *count = 0;
527         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
528             av_freep(dst);
529         po++;
530     }
531
532     for (i = 0; i < o->nb_stream_maps; i++)
533         av_freep(&o->stream_maps[i].linklabel);
534     av_freep(&o->stream_maps);
535     av_freep(&o->audio_channel_maps);
536     av_freep(&o->streamid_map);
537
538     memset(o, 0, sizeof(*o));
539
540     if (is_input) {
541         o->recording_time = bak.recording_time;
542         if (o->recording_time != INT64_MAX)
543             av_log(NULL, AV_LOG_WARNING,
544                    "-t is not an input option, keeping it for the next output;"
545                    " consider fixing your command line.\n");
546     } else
547         o->recording_time = INT64_MAX;
548     o->mux_max_delay  = 0.7;
549     o->limit_filesize = UINT64_MAX;
550     o->chapters_input_file = INT_MAX;
551
552     uninit_opts();
553     init_opts();
554 }
555
556 static enum PixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum PixelFormat target)
557 {
558     if (codec && codec->pix_fmts) {
559         const enum PixelFormat *p = codec->pix_fmts;
560         int has_alpha= av_pix_fmt_descriptors[target].nb_components % 2 == 0;
561         enum PixelFormat best= PIX_FMT_NONE;
562         if (st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
563             if (st->codec->codec_id == CODEC_ID_MJPEG) {
564                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
565             } else if (st->codec->codec_id == CODEC_ID_LJPEG) {
566                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
567                                                  PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
568             }
569         }
570         for (; *p != PIX_FMT_NONE; p++) {
571             best= avcodec_find_best_pix_fmt2(best, *p, target, has_alpha, NULL);
572             if (*p == target)
573                 break;
574         }
575         if (*p == PIX_FMT_NONE) {
576             if (target != PIX_FMT_NONE)
577                 av_log(NULL, AV_LOG_WARNING,
578                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
579                        av_pix_fmt_descriptors[target].name,
580                        codec->name,
581                        av_pix_fmt_descriptors[best].name);
582             return best;
583         }
584     }
585     return target;
586 }
587
588 static char *choose_pix_fmts(OutputStream *ost)
589 {
590      if (ost->keep_pix_fmt) {
591         if (ost->filter)
592             avfilter_graph_set_auto_convert(ost->filter->graph->graph,
593                                             AVFILTER_AUTO_CONVERT_NONE);
594         if (ost->st->codec->pix_fmt == PIX_FMT_NONE)
595             return NULL;
596         return av_strdup(av_get_pix_fmt_name(ost->st->codec->pix_fmt));
597     }
598     if (ost->st->codec->pix_fmt != PIX_FMT_NONE) {
599         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc, ost->st->codec->pix_fmt)));
600     } else if (ost->enc && ost->enc->pix_fmts) {
601         const enum PixelFormat *p;
602         AVIOContext *s = NULL;
603         uint8_t *ret;
604         int len;
605
606         if (avio_open_dyn_buf(&s) < 0)
607             exit_program(1);
608
609         p = ost->enc->pix_fmts;
610         if (ost->st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
611             if (ost->st->codec->codec_id == CODEC_ID_MJPEG) {
612                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
613             } else if (ost->st->codec->codec_id == CODEC_ID_LJPEG) {
614                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
615                                                     PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
616             }
617         }
618
619         for (; *p != PIX_FMT_NONE; p++) {
620             const char *name = av_get_pix_fmt_name(*p);
621             avio_printf(s, "%s:", name);
622         }
623         len = avio_close_dyn_buf(s, &ret);
624         ret[len - 1] = 0;
625         return ret;
626     } else
627         return NULL;
628 }
629
630 /**
631  * Define a function for building a string containing a list of
632  * allowed formats,
633  */
634 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator) \
635 static char *choose_ ## var ## s(OutputStream *ost)                             \
636 {                                                                               \
637     if (ost->st->codec->var != none) {                                          \
638         get_name(ost->st->codec->var);                                          \
639         return av_strdup(name);                                                 \
640     } else if (ost->enc->supported_list) {                                      \
641         const type *p;                                                          \
642         AVIOContext *s = NULL;                                                  \
643         uint8_t *ret;                                                           \
644         int len;                                                                \
645                                                                                 \
646         if (avio_open_dyn_buf(&s) < 0)                                          \
647             exit_program(1);                                                    \
648                                                                                 \
649         for (p = ost->enc->supported_list; *p != none; p++) {                   \
650             get_name(*p);                                                       \
651             avio_printf(s, "%s" separator, name);                               \
652         }                                                                       \
653         len = avio_close_dyn_buf(s, &ret);                                      \
654         ret[len - 1] = 0;                                                       \
655         return ret;                                                             \
656     } else                                                                      \
657         return NULL;                                                            \
658 }
659
660 #define GET_PIX_FMT_NAME(pix_fmt)\
661     const char *name = av_get_pix_fmt_name(pix_fmt);
662
663 // DEF_CHOOSE_FORMAT(enum PixelFormat, pix_fmt, pix_fmts, PIX_FMT_NONE,
664 //                   GET_PIX_FMT_NAME, ":")
665
666 #define GET_SAMPLE_FMT_NAME(sample_fmt)\
667     const char *name = av_get_sample_fmt_name(sample_fmt)
668
669 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
670                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME, ",")
671
672 #define GET_SAMPLE_RATE_NAME(rate)\
673     char name[16];\
674     snprintf(name, sizeof(name), "%d", rate);
675
676 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
677                   GET_SAMPLE_RATE_NAME, ",")
678
679 #define GET_CH_LAYOUT_NAME(ch_layout)\
680     char name[16];\
681     snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
682
683 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
684                   GET_CH_LAYOUT_NAME, ",")
685
686 static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
687 {
688     FilterGraph *fg = av_mallocz(sizeof(*fg));
689
690     if (!fg)
691         exit_program(1);
692     fg->index = nb_filtergraphs;
693
694     fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
695                              fg->nb_outputs + 1);
696     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
697         exit_program(1);
698     fg->outputs[0]->ost   = ost;
699     fg->outputs[0]->graph = fg;
700
701     ost->filter = fg->outputs[0];
702
703     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
704                             fg->nb_inputs + 1);
705     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
706         exit_program(1);
707     fg->inputs[0]->ist   = ist;
708     fg->inputs[0]->graph = fg;
709
710     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
711                               &ist->nb_filters, ist->nb_filters + 1);
712     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
713
714     filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
715                               &nb_filtergraphs, nb_filtergraphs + 1);
716     filtergraphs[nb_filtergraphs - 1] = fg;
717
718     return fg;
719 }
720
721 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
722 {
723     InputStream *ist = NULL;
724     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
725     int i;
726
727     // TODO: support other filter types
728     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
729         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
730                "currently.\n");
731         exit_program(1);
732     }
733
734     if (in->name) {
735         AVFormatContext *s;
736         AVStream       *st = NULL;
737         char *p;
738         int file_idx = strtol(in->name, &p, 0);
739
740         if (file_idx < 0 || file_idx >= nb_input_files) {
741             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
742                    file_idx, fg->graph_desc);
743             exit_program(1);
744         }
745         s = input_files[file_idx]->ctx;
746
747         for (i = 0; i < s->nb_streams; i++) {
748             if (s->streams[i]->codec->codec_type != type)
749                 continue;
750             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
751                 st = s->streams[i];
752                 break;
753             }
754         }
755         if (!st) {
756             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
757                    "matches no streams.\n", p, fg->graph_desc);
758             exit_program(1);
759         }
760         ist = input_streams[input_files[file_idx]->ist_index + st->index];
761     } else {
762         /* find the first unused stream of corresponding type */
763         for (i = 0; i < nb_input_streams; i++) {
764             ist = input_streams[i];
765             if (ist->st->codec->codec_type == type && ist->discard)
766                 break;
767         }
768         if (i == nb_input_streams) {
769             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
770                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
771                    in->filter_ctx->name);
772             exit_program(1);
773         }
774     }
775     av_assert0(ist);
776
777     ist->discard         = 0;
778     ist->decoding_needed = 1;
779     ist->st->discard = AVDISCARD_NONE;
780
781     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
782                             &fg->nb_inputs, fg->nb_inputs + 1);
783     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
784         exit_program(1);
785     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
786     fg->inputs[fg->nb_inputs - 1]->graph = fg;
787
788     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
789                               &ist->nb_filters, ist->nb_filters + 1);
790     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
791 }
792
793 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
794 {
795     char *pix_fmts;
796     OutputStream *ost = ofilter->ost;
797     AVCodecContext *codec = ost->st->codec;
798     AVFilterContext *last_filter = out->filter_ctx;
799     int pad_idx = out->pad_idx;
800     int ret;
801     char name[255];
802     AVBufferSinkParams *buffersink_params = av_buffersink_params_alloc();
803
804     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
805     ret = avfilter_graph_create_filter(&ofilter->filter,
806                                        avfilter_get_by_name("buffersink"),
807                                        name, NULL, NULL/*buffersink_params*/, fg->graph);
808     av_freep(&buffersink_params);
809
810     if (ret < 0)
811         return ret;
812
813     if (codec->width || codec->height) {
814         char args[255];
815         AVFilterContext *filter;
816
817         snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
818                  codec->width,
819                  codec->height,
820                  (unsigned)ost->sws_flags);
821         snprintf(name, sizeof(name), "scaler for output stream %d:%d",
822                  ost->file_index, ost->index);
823         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
824                                                 name, args, NULL, fg->graph)) < 0)
825             return ret;
826         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
827             return ret;
828
829         last_filter = filter;
830         pad_idx = 0;
831     }
832
833     if ((pix_fmts = choose_pix_fmts(ost))) {
834         AVFilterContext *filter;
835         snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
836                  ost->file_index, ost->index);
837         if ((ret = avfilter_graph_create_filter(&filter,
838                                                 avfilter_get_by_name("format"),
839                                                 "format", pix_fmts, NULL,
840                                                 fg->graph)) < 0)
841             return ret;
842         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
843             return ret;
844
845         last_filter = filter;
846         pad_idx     = 0;
847         av_freep(&pix_fmts);
848     }
849
850     if (ost->frame_rate.num && 0) {
851         AVFilterContext *fps;
852         char args[255];
853
854         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
855                  ost->frame_rate.den);
856         snprintf(name, sizeof(name), "fps for output stream %d:%d",
857                  ost->file_index, ost->index);
858         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
859                                            name, args, NULL, fg->graph);
860         if (ret < 0)
861             return ret;
862
863         ret = avfilter_link(last_filter, pad_idx, fps, 0);
864         if (ret < 0)
865             return ret;
866         last_filter = fps;
867         pad_idx = 0;
868     }
869
870     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
871         return ret;
872
873     return 0;
874 }
875
876 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
877 {
878     OutputStream *ost = ofilter->ost;
879     AVCodecContext *codec  = ost->st->codec;
880     AVFilterContext *last_filter = out->filter_ctx;
881     int pad_idx = out->pad_idx;
882     char *sample_fmts, *sample_rates, *channel_layouts;
883     char name[255];
884     int ret;
885
886
887     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
888     ret = avfilter_graph_create_filter(&ofilter->filter,
889                                        avfilter_get_by_name("abuffersink"),
890                                        name, NULL, NULL, fg->graph);
891     if (ret < 0)
892         return ret;
893
894 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
895     AVFilterContext *filt_ctx;                                              \
896                                                                             \
897     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
898            "similarly to -af " filter_name "=%s.\n", arg);                  \
899                                                                             \
900     ret = avfilter_graph_create_filter(&filt_ctx,                           \
901                                        avfilter_get_by_name(filter_name),   \
902                                        filter_name, arg, NULL, fg->graph);  \
903     if (ret < 0)                                                            \
904         return ret;                                                         \
905                                                                             \
906     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
907     if (ret < 0)                                                            \
908         return ret;                                                         \
909                                                                             \
910     last_filter = filt_ctx;                                                 \
911     pad_idx = 0;                                                            \
912 } while (0)
913     if (ost->audio_channels_mapped) {
914         int i;
915         AVBPrint pan_buf;
916         av_bprint_init(&pan_buf, 256, 8192);
917         av_bprintf(&pan_buf, "0x%"PRIx64,
918                    av_get_default_channel_layout(ost->audio_channels_mapped));
919         for (i = 0; i < ost->audio_channels_mapped; i++)
920             if (ost->audio_channels_map[i] != -1)
921                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
922
923         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
924         av_bprint_finalize(&pan_buf, NULL);
925     }
926
927     if (codec->channels && !codec->channel_layout)
928         codec->channel_layout = av_get_default_channel_layout(codec->channels);
929
930     sample_fmts     = choose_sample_fmts(ost);
931     sample_rates    = choose_sample_rates(ost);
932     channel_layouts = choose_channel_layouts(ost);
933     if (sample_fmts || sample_rates || channel_layouts) {
934         AVFilterContext *format;
935         char args[256];
936         int len = 0;
937
938         if (sample_fmts)
939             len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
940                             sample_fmts);
941         if (sample_rates)
942             len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
943                             sample_rates);
944         if (channel_layouts)
945             len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
946                             channel_layouts);
947         args[len - 1] = 0;
948
949         av_freep(&sample_fmts);
950         av_freep(&sample_rates);
951         av_freep(&channel_layouts);
952
953         snprintf(name, sizeof(name), "audio format for output stream %d:%d",
954                  ost->file_index, ost->index);
955         ret = avfilter_graph_create_filter(&format,
956                                            avfilter_get_by_name("aformat"),
957                                            name, args, NULL, fg->graph);
958         if (ret < 0)
959             return ret;
960
961         ret = avfilter_link(last_filter, pad_idx, format, 0);
962         if (ret < 0)
963             return ret;
964
965         last_filter = format;
966         pad_idx = 0;
967     }
968
969     if (audio_volume != 256 && 0) {
970         char args[256];
971
972         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
973         AUTO_INSERT_FILTER("-vol", "volume", args);
974     }
975
976     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
977         return ret;
978
979     return 0;
980 }
981
982 #define DESCRIBE_FILTER_LINK(f, inout, in)                         \
983 {                                                                  \
984     AVFilterContext *ctx = inout->filter_ctx;                      \
985     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;  \
986     int       nb_pads = in ? ctx->input_count : ctx->output_count; \
987     AVIOContext *pb;                                               \
988                                                                    \
989     if (avio_open_dyn_buf(&pb) < 0)                                \
990         exit_program(1);                                           \
991                                                                    \
992     avio_printf(pb, "%s", ctx->filter->name);                      \
993     if (nb_pads > 1)                                               \
994         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
995     avio_w8(pb, 0);                                                \
996     avio_close_dyn_buf(pb, &f->name);                              \
997 }
998
999 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
1000 {
1001     av_freep(&ofilter->name);
1002     DESCRIBE_FILTER_LINK(ofilter, out, 0);
1003
1004     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
1005     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
1006     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
1007     default: av_assert0(0);
1008     }
1009 }
1010
1011 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
1012                                         AVFilterInOut *in)
1013 {
1014     AVFilterContext *first_filter = in->filter_ctx;
1015     AVFilter *filter = avfilter_get_by_name("buffer");
1016     InputStream *ist = ifilter->ist;
1017     AVRational tb = ist->framerate.num ? (AVRational){ist->framerate.den,
1018                                                       ist->framerate.num} :
1019                                          ist->st->time_base;
1020     AVRational fr = ist->framerate.num ? ist->framerate :
1021                                          ist->st->r_frame_rate;
1022     AVRational sar;
1023     AVBPrint args;
1024     char name[255];
1025     int pad_idx = in->pad_idx;
1026     int ret;
1027
1028     sar = ist->st->sample_aspect_ratio.num ?
1029           ist->st->sample_aspect_ratio :
1030           ist->st->codec->sample_aspect_ratio;
1031     if(!sar.den)
1032         sar = (AVRational){0,1};
1033     av_bprint_init(&args, 0, 1);
1034     av_bprintf(&args,
1035              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
1036              "pixel_aspect=%d/%d:sws_param=flags=%d", ist->st->codec->width,
1037              ist->st->codec->height, ist->st->codec->pix_fmt,
1038              tb.num, tb.den, sar.num, sar.den,
1039              SWS_BILINEAR + ((ist->st->codec->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
1040     if (fr.num && fr.den)
1041         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
1042     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
1043              ist->file_index, ist->st->index);
1044
1045     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, name,
1046                                             args.str, NULL, fg->graph)) < 0)
1047         return ret;
1048
1049     if (ist->framerate.num) {
1050         AVFilterContext *setpts;
1051
1052         snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
1053                  ist->file_index, ist->st->index);
1054         if ((ret = avfilter_graph_create_filter(&setpts,
1055                                                 avfilter_get_by_name("setpts"),
1056                                                 name, "N", NULL,
1057                                                 fg->graph)) < 0)
1058             return ret;
1059
1060         if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0)
1061             return ret;
1062
1063         first_filter = setpts;
1064         pad_idx = 0;
1065     }
1066
1067     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
1068         return ret;
1069     return 0;
1070 }
1071
1072 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
1073                                         AVFilterInOut *in)
1074 {
1075     AVFilterContext *first_filter = in->filter_ctx;
1076     AVFilter *filter = avfilter_get_by_name("abuffer");
1077     InputStream *ist = ifilter->ist;
1078     int pad_idx = in->pad_idx;
1079     char args[255], name[255];
1080     int ret;
1081
1082     snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s"
1083              ":channel_layout=0x%"PRIx64,
1084              1, ist->st->codec->sample_rate,
1085              ist->st->codec->sample_rate,
1086              av_get_sample_fmt_name(ist->st->codec->sample_fmt),
1087              ist->st->codec->channel_layout);
1088     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
1089              ist->file_index, ist->st->index);
1090
1091     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter,
1092                                             name, args, NULL,
1093                                             fg->graph)) < 0)
1094         return ret;
1095
1096 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
1097     AVFilterContext *filt_ctx;                                              \
1098                                                                             \
1099     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
1100            "similarly to -af " filter_name "=%s.\n", arg);                  \
1101                                                                             \
1102     snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d",      \
1103                 fg->index, filter_name, ist->file_index, ist->st->index);   \
1104     ret = avfilter_graph_create_filter(&filt_ctx,                           \
1105                                        avfilter_get_by_name(filter_name),   \
1106                                        name, arg, NULL, fg->graph);         \
1107     if (ret < 0)                                                            \
1108         return ret;                                                         \
1109                                                                             \
1110     ret = avfilter_link(filt_ctx, 0, first_filter, pad_idx);                \
1111     if (ret < 0)                                                            \
1112         return ret;                                                         \
1113                                                                             \
1114     first_filter = filt_ctx;                                                  \
1115 } while (0)
1116
1117     if (audio_sync_method > 0) {
1118         char args[256] = {0};
1119
1120         av_strlcatf(args, sizeof(args), "min_comp=0.001:min_hard_comp=%f", audio_drift_threshold);
1121         if (audio_sync_method > 1)
1122             av_strlcatf(args, sizeof(args), ":max_soft_comp=%f", audio_sync_method/(double)ist->st->codec->sample_rate);
1123         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
1124     }
1125
1126 //     if (ost->audio_channels_mapped) {
1127 //         int i;
1128 //         AVBPrint pan_buf;
1129 //         av_bprint_init(&pan_buf, 256, 8192);
1130 //         av_bprintf(&pan_buf, "0x%"PRIx64,
1131 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
1132 //         for (i = 0; i < ost->audio_channels_mapped; i++)
1133 //             if (ost->audio_channels_map[i] != -1)
1134 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
1135 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
1136 //         av_bprint_finalize(&pan_buf, NULL);
1137 //     }
1138
1139     if (audio_volume != 256) {
1140         char args[256];
1141
1142         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
1143         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
1144     }
1145     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
1146         return ret;
1147
1148     return 0;
1149 }
1150
1151 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
1152                                   AVFilterInOut *in)
1153 {
1154     av_freep(&ifilter->name);
1155     DESCRIBE_FILTER_LINK(ifilter, in, 1);
1156
1157     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
1158     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
1159     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
1160     default: av_assert0(0);
1161     }
1162 }
1163
1164 static int configure_filtergraph(FilterGraph *fg)
1165 {
1166     AVFilterInOut *inputs, *outputs, *cur;
1167     int ret, i, init = !fg->graph, simple = !fg->graph_desc;
1168     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1169                                       fg->graph_desc;
1170
1171     avfilter_graph_free(&fg->graph);
1172     if (!(fg->graph = avfilter_graph_alloc()))
1173         return AVERROR(ENOMEM);
1174
1175     if (simple) {
1176         OutputStream *ost = fg->outputs[0]->ost;
1177         char args[255];
1178         snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
1179         fg->graph->scale_sws_opts = av_strdup(args);
1180     }
1181
1182     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1183         return ret;
1184
1185     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1186         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
1187                "exactly one input and output.\n", graph_desc);
1188         return AVERROR(EINVAL);
1189     }
1190
1191     for (cur = inputs; !simple && init && cur; cur = cur->next)
1192         init_input_filter(fg, cur);
1193
1194     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1195         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
1196             return ret;
1197     avfilter_inout_free(&inputs);
1198
1199     if (!init || simple) {
1200         /* we already know the mappings between lavfi outputs and output streams,
1201          * so we can finish the setup */
1202         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1203             configure_output_filter(fg, fg->outputs[i], cur);
1204         avfilter_inout_free(&outputs);
1205
1206         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1207             return ret;
1208     } else {
1209         /* wait until output mappings are processed */
1210         for (cur = outputs; cur;) {
1211             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
1212                                      &fg->nb_outputs, fg->nb_outputs + 1);
1213             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
1214                 exit_program(1);
1215             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
1216             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
1217             cur = cur->next;
1218             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
1219         }
1220     }
1221
1222     return 0;
1223 }
1224
1225 static int configure_complex_filters(void)
1226 {
1227     int i, ret = 0;
1228
1229     for (i = 0; i < nb_filtergraphs; i++)
1230         if (!filtergraphs[i]->graph &&
1231             (ret = configure_filtergraph(filtergraphs[i])) < 0)
1232             return ret;
1233     return 0;
1234 }
1235
1236 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1237 {
1238     int i;
1239     for (i = 0; i < fg->nb_inputs; i++)
1240         if (fg->inputs[i]->ist == ist)
1241             return 1;
1242     return 0;
1243 }
1244
1245 static void term_exit(void)
1246 {
1247     av_log(NULL, AV_LOG_QUIET, "%s", "");
1248 #if HAVE_TERMIOS_H
1249     if(restore_tty)
1250         tcsetattr (0, TCSANOW, &oldtty);
1251 #endif
1252 }
1253
1254 static volatile int received_sigterm = 0;
1255
1256 static void sigterm_handler(int sig)
1257 {
1258     received_sigterm = sig;
1259     received_nb_signals++;
1260     term_exit();
1261     if(received_nb_signals > 3)
1262         exit(123);
1263 }
1264
1265 static void term_init(void)
1266 {
1267 #if HAVE_TERMIOS_H
1268     if(!run_as_daemon){
1269         struct termios tty;
1270         int istty = 1;
1271 #if HAVE_ISATTY
1272         istty = isatty(0) && isatty(2);
1273 #endif
1274         if (istty && tcgetattr (0, &tty) == 0) {
1275             oldtty = tty;
1276             restore_tty = 1;
1277             atexit(term_exit);
1278
1279             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1280                              |INLCR|IGNCR|ICRNL|IXON);
1281             tty.c_oflag |= OPOST;
1282             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1283             tty.c_cflag &= ~(CSIZE|PARENB);
1284             tty.c_cflag |= CS8;
1285             tty.c_cc[VMIN] = 1;
1286             tty.c_cc[VTIME] = 0;
1287
1288             tcsetattr (0, TCSANOW, &tty);
1289         }
1290         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
1291     }
1292 #endif
1293     avformat_network_deinit();
1294
1295     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1296     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1297 #ifdef SIGXCPU
1298     signal(SIGXCPU, sigterm_handler);
1299 #endif
1300 }
1301
1302 /* read a key without blocking */
1303 static int read_key(void)
1304 {
1305     unsigned char ch;
1306 #if HAVE_TERMIOS_H
1307     int n = 1;
1308     struct timeval tv;
1309     fd_set rfds;
1310
1311     FD_ZERO(&rfds);
1312     FD_SET(0, &rfds);
1313     tv.tv_sec = 0;
1314     tv.tv_usec = 0;
1315     n = select(1, &rfds, NULL, NULL, &tv);
1316     if (n > 0) {
1317         n = read(0, &ch, 1);
1318         if (n == 1)
1319             return ch;
1320
1321         return n;
1322     }
1323 #elif HAVE_KBHIT
1324 #    if HAVE_PEEKNAMEDPIPE
1325     static int is_pipe;
1326     static HANDLE input_handle;
1327     DWORD dw, nchars;
1328     if(!input_handle){
1329         input_handle = GetStdHandle(STD_INPUT_HANDLE);
1330         is_pipe = !GetConsoleMode(input_handle, &dw);
1331     }
1332
1333     if (stdin->_cnt > 0) {
1334         read(0, &ch, 1);
1335         return ch;
1336     }
1337     if (is_pipe) {
1338         /* When running under a GUI, you will end here. */
1339         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL))
1340             return -1;
1341         //Read it
1342         if(nchars != 0) {
1343             read(0, &ch, 1);
1344             return ch;
1345         }else{
1346             return -1;
1347         }
1348     }
1349 #    endif
1350     if(kbhit())
1351         return(getch());
1352 #endif
1353     return -1;
1354 }
1355
1356 static int decode_interrupt_cb(void *ctx)
1357 {
1358     return received_nb_signals > 1;
1359 }
1360
1361 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1362
1363 void av_noreturn exit_program(int ret)
1364 {
1365     int i, j;
1366
1367     for (i = 0; i < nb_filtergraphs; i++) {
1368         avfilter_graph_free(&filtergraphs[i]->graph);
1369         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
1370             av_freep(&filtergraphs[i]->inputs[j]->name);
1371             av_freep(&filtergraphs[i]->inputs[j]);
1372         }
1373         av_freep(&filtergraphs[i]->inputs);
1374         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
1375             av_freep(&filtergraphs[i]->outputs[j]->name);
1376             av_freep(&filtergraphs[i]->outputs[j]);
1377         }
1378         av_freep(&filtergraphs[i]->outputs);
1379         av_freep(&filtergraphs[i]);
1380     }
1381     av_freep(&filtergraphs);
1382
1383     av_freep(&subtitle_out);
1384
1385     /* close files */
1386     for (i = 0; i < nb_output_files; i++) {
1387         AVFormatContext *s = output_files[i]->ctx;
1388         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1389             avio_close(s->pb);
1390         avformat_free_context(s);
1391         av_dict_free(&output_files[i]->opts);
1392         av_freep(&output_files[i]);
1393     }
1394     for (i = 0; i < nb_output_streams; i++) {
1395         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1396         while (bsfc) {
1397             AVBitStreamFilterContext *next = bsfc->next;
1398             av_bitstream_filter_close(bsfc);
1399             bsfc = next;
1400         }
1401         output_streams[i]->bitstream_filters = NULL;
1402
1403         av_freep(&output_streams[i]->forced_keyframes);
1404         av_freep(&output_streams[i]->filtered_frame);
1405         av_freep(&output_streams[i]->avfilter);
1406         av_freep(&output_streams[i]);
1407     }
1408     for (i = 0; i < nb_input_files; i++) {
1409         avformat_close_input(&input_files[i]->ctx);
1410         av_freep(&input_files[i]);
1411     }
1412     for (i = 0; i < nb_input_streams; i++) {
1413         av_freep(&input_streams[i]->decoded_frame);
1414         av_dict_free(&input_streams[i]->opts);
1415         free_buffer_pool(&input_streams[i]->buffer_pool);
1416         av_freep(&input_streams[i]->filters);
1417         av_freep(&input_streams[i]);
1418     }
1419
1420     if (vstats_file)
1421         fclose(vstats_file);
1422     av_free(vstats_filename);
1423
1424     av_freep(&input_streams);
1425     av_freep(&input_files);
1426     av_freep(&output_streams);
1427     av_freep(&output_files);
1428
1429     uninit_opts();
1430
1431     avfilter_uninit();
1432     avformat_network_deinit();
1433
1434     if (received_sigterm) {
1435         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1436                (int) received_sigterm);
1437         exit (255);
1438     }
1439
1440     exit(ret);
1441 }
1442
1443 static void assert_avoptions(AVDictionary *m)
1444 {
1445     AVDictionaryEntry *t;
1446     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1447         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1448         exit_program(1);
1449     }
1450 }
1451
1452 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1453 {
1454     const char *codec_string = encoder ? "encoder" : "decoder";
1455     AVCodec *codec;
1456     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1457         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1458         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1459                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1460                 codec_string, c->codec->name);
1461         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1462         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1463             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1464                    codec_string, codec->name);
1465         exit_program(1);
1466     }
1467 }
1468
1469 static void choose_sample_fmt(AVStream *st, AVCodec *codec)
1470 {
1471     if (codec && codec->sample_fmts) {
1472         const enum AVSampleFormat *p = codec->sample_fmts;
1473         for (; *p != -1; p++) {
1474             if (*p == st->codec->sample_fmt)
1475                 break;
1476         }
1477         if (*p == -1) {
1478             if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
1479                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
1480             if(av_get_sample_fmt_name(st->codec->sample_fmt))
1481             av_log(NULL, AV_LOG_WARNING,
1482                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
1483                    av_get_sample_fmt_name(st->codec->sample_fmt),
1484                    codec->name,
1485                    av_get_sample_fmt_name(codec->sample_fmts[0]));
1486             st->codec->sample_fmt = codec->sample_fmts[0];
1487         }
1488     }
1489 }
1490
1491 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1492 {
1493     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1494     AVCodecContext          *avctx = ost->st->codec;
1495     int ret;
1496
1497     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
1498         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
1499         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1500
1501     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1502         int64_t max = ost->st->cur_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
1503         if (ost->st->cur_dts && ost->st->cur_dts != AV_NOPTS_VALUE &&  max > pkt->dts) {
1504             av_log(s, max - pkt->dts > 2 ? AV_LOG_WARNING : AV_LOG_DEBUG, "Audio timestamp %"PRId64" < %"PRId64" invalid, cliping\n", pkt->dts, max);
1505             pkt->pts = pkt->dts = max;
1506         }
1507     }
1508
1509     /*
1510      * Audio encoders may split the packets --  #frames in != #packets out.
1511      * But there is no reordering, so we can limit the number of output packets
1512      * by simply dropping them here.
1513      * Counting encoded video frames needs to be done separately because of
1514      * reordering, see do_video_out()
1515      */
1516     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1517         if (ost->frame_number >= ost->max_frames) {
1518             av_free_packet(pkt);
1519             return;
1520         }
1521         ost->frame_number++;
1522     }
1523
1524     while (bsfc) {
1525         AVPacket new_pkt = *pkt;
1526         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1527                                            &new_pkt.data, &new_pkt.size,
1528                                            pkt->data, pkt->size,
1529                                            pkt->flags & AV_PKT_FLAG_KEY);
1530         if (a > 0) {
1531             av_free_packet(pkt);
1532             new_pkt.destruct = av_destruct_packet;
1533         } else if (a < 0) {
1534             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
1535                    bsfc->filter->name, pkt->stream_index,
1536                    avctx->codec ? avctx->codec->name : "copy");
1537             print_error("", a);
1538             if (exit_on_error)
1539                 exit_program(1);
1540         }
1541         *pkt = new_pkt;
1542
1543         bsfc = bsfc->next;
1544     }
1545
1546     pkt->stream_index = ost->index;
1547     ret = av_interleaved_write_frame(s, pkt);
1548     if (ret < 0) {
1549         print_error("av_interleaved_write_frame()", ret);
1550         exit_program(1);
1551     }
1552 }
1553
1554 static int check_recording_time(OutputStream *ost)
1555 {
1556     OutputFile *of = output_files[ost->file_index];
1557
1558     if (of->recording_time != INT64_MAX &&
1559         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
1560                       AV_TIME_BASE_Q) >= 0) {
1561         ost->is_past_recording_time = 1;
1562         return 0;
1563     }
1564     return 1;
1565 }
1566
1567 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1568                          AVFrame *frame)
1569 {
1570     AVCodecContext *enc = ost->st->codec;
1571     AVPacket pkt;
1572     int got_packet = 0;
1573
1574     av_init_packet(&pkt);
1575     pkt.data = NULL;
1576     pkt.size = 0;
1577
1578     if (!check_recording_time(ost))
1579         return;
1580
1581     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
1582         frame->pts = ost->sync_opts;
1583     ost->sync_opts = frame->pts + frame->nb_samples;
1584
1585     av_assert0(pkt.size || !pkt.data);
1586     update_benchmark(NULL);
1587     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1588         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
1589         exit_program(1);
1590     }
1591     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
1592
1593     if (got_packet) {
1594         if (pkt.pts != AV_NOPTS_VALUE)
1595             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1596         if (pkt.dts != AV_NOPTS_VALUE)
1597             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1598         if (pkt.duration > 0)
1599             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1600
1601         if (debug_ts) {
1602             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
1603                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1604                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1605                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1606         }
1607
1608         write_frame(s, &pkt, ost);
1609
1610         audio_size += pkt.size;
1611         av_free_packet(&pkt);
1612     }
1613 }
1614
1615 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1616 {
1617     AVCodecContext *dec;
1618     AVPicture *picture2;
1619     AVPicture picture_tmp;
1620     uint8_t *buf = 0;
1621
1622     dec = ist->st->codec;
1623
1624     /* deinterlace : must be done before any resize */
1625     if (do_deinterlace) {
1626         int size;
1627
1628         /* create temporary picture */
1629         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1630         buf  = av_malloc(size);
1631         if (!buf)
1632             return;
1633
1634         picture2 = &picture_tmp;
1635         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1636
1637         if (avpicture_deinterlace(picture2, picture,
1638                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1639             /* if error, do not deinterlace */
1640             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1641             av_free(buf);
1642             buf = NULL;
1643             picture2 = picture;
1644         }
1645     } else {
1646         picture2 = picture;
1647     }
1648
1649     if (picture != picture2)
1650         *picture = *picture2;
1651     *bufp = buf;
1652 }
1653
1654 static void do_subtitle_out(AVFormatContext *s,
1655                             OutputStream *ost,
1656                             InputStream *ist,
1657                             AVSubtitle *sub,
1658                             int64_t pts)
1659 {
1660     int subtitle_out_max_size = 1024 * 1024;
1661     int subtitle_out_size, nb, i;
1662     AVCodecContext *enc;
1663     AVPacket pkt;
1664
1665     if (pts == AV_NOPTS_VALUE) {
1666         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1667         if (exit_on_error)
1668             exit_program(1);
1669         return;
1670     }
1671
1672     enc = ost->st->codec;
1673
1674     if (!subtitle_out) {
1675         subtitle_out = av_malloc(subtitle_out_max_size);
1676     }
1677
1678     /* Note: DVB subtitle need one packet to draw them and one other
1679        packet to clear them */
1680     /* XXX: signal it in the codec context ? */
1681     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1682         nb = 2;
1683     else
1684         nb = 1;
1685
1686     for (i = 0; i < nb; i++) {
1687         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1688         if (!check_recording_time(ost))
1689             return;
1690
1691         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1692         // start_display_time is required to be 0
1693         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1694         sub->end_display_time  -= sub->start_display_time;
1695         sub->start_display_time = 0;
1696         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1697                                                     subtitle_out_max_size, sub);
1698         if (subtitle_out_size < 0) {
1699             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1700             exit_program(1);
1701         }
1702
1703         av_init_packet(&pkt);
1704         pkt.data = subtitle_out;
1705         pkt.size = subtitle_out_size;
1706         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1707         pkt.duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->st->time_base);
1708         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1709             /* XXX: the pts correction is handled here. Maybe handling
1710                it in the codec would be better */
1711             if (i == 0)
1712                 pkt.pts += 90 * sub->start_display_time;
1713             else
1714                 pkt.pts += 90 * sub->end_display_time;
1715         }
1716         write_frame(s, &pkt, ost);
1717         subtitle_size += pkt.size;
1718     }
1719 }
1720
1721 static void do_video_out(AVFormatContext *s,
1722                          OutputStream *ost,
1723                          AVFrame *in_picture,
1724                          float quality)
1725 {
1726     int ret, format_video_sync;
1727     AVPacket pkt;
1728     AVCodecContext *enc = ost->st->codec;
1729     int nb_frames, i;
1730     double sync_ipts, delta;
1731     double duration = 0;
1732     int frame_size = 0;
1733     InputStream *ist = NULL;
1734
1735     if (ost->source_index >= 0)
1736         ist = input_streams[ost->source_index];
1737
1738     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
1739         duration = 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base));
1740
1741     sync_ipts = in_picture->pts;
1742     delta = sync_ipts - ost->sync_opts + duration;
1743
1744     /* by default, we output a single frame */
1745     nb_frames = 1;
1746
1747     format_video_sync = video_sync_method;
1748     if (format_video_sync == VSYNC_AUTO)
1749         format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : 1;
1750
1751     switch (format_video_sync) {
1752     case VSYNC_CFR:
1753         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
1754         if (delta < -1.1)
1755             nb_frames = 0;
1756         else if (delta > 1.1)
1757             nb_frames = lrintf(delta);
1758         break;
1759     case VSYNC_VFR:
1760         if (delta <= -0.6)
1761             nb_frames = 0;
1762         else if (delta > 0.6)
1763             ost->sync_opts = lrint(sync_ipts);
1764         break;
1765     case VSYNC_DROP:
1766     case VSYNC_PASSTHROUGH:
1767         ost->sync_opts = lrint(sync_ipts);
1768         break;
1769     default:
1770         av_assert0(0);
1771     }
1772
1773     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
1774     if (nb_frames == 0) {
1775         nb_frames_drop++;
1776         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1777         return;
1778     } else if (nb_frames > 1) {
1779         if (nb_frames > dts_error_threshold * 30) {
1780             av_log(NULL, AV_LOG_ERROR, "%d frame duplication too large, skiping\n", nb_frames - 1);
1781             nb_frames_drop++;
1782             return;
1783         }
1784         nb_frames_dup += nb_frames - 1;
1785         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
1786     }
1787
1788   /* duplicates frame if needed */
1789   for (i = 0; i < nb_frames; i++) {
1790     av_init_packet(&pkt);
1791     pkt.data = NULL;
1792     pkt.size = 0;
1793
1794     in_picture->pts = ost->sync_opts;
1795
1796     if (!check_recording_time(ost))
1797         return;
1798
1799     if (s->oformat->flags & AVFMT_RAWPICTURE &&
1800         enc->codec->id == CODEC_ID_RAWVIDEO) {
1801         /* raw pictures are written as AVPicture structure to
1802            avoid any copies. We support temporarily the older
1803            method. */
1804         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1805         enc->coded_frame->top_field_first  = in_picture->top_field_first;
1806         pkt.data   = (uint8_t *)in_picture;
1807         pkt.size   =  sizeof(AVPicture);
1808         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
1809         pkt.flags |= AV_PKT_FLAG_KEY;
1810
1811         write_frame(s, &pkt, ost);
1812         video_size += pkt.size;
1813     } else {
1814         int got_packet;
1815         AVFrame big_picture;
1816
1817         big_picture = *in_picture;
1818         /* better than nothing: use input picture interlaced
1819            settings */
1820         big_picture.interlaced_frame = in_picture->interlaced_frame;
1821         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1822             if (ost->top_field_first == -1)
1823                 big_picture.top_field_first = in_picture->top_field_first;
1824             else
1825                 big_picture.top_field_first = !!ost->top_field_first;
1826         }
1827
1828         /* handles same_quant here. This is not correct because it may
1829            not be a global option */
1830         big_picture.quality = quality;
1831         if (!enc->me_threshold)
1832             big_picture.pict_type = 0;
1833         if (ost->forced_kf_index < ost->forced_kf_count &&
1834             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1835             big_picture.pict_type = AV_PICTURE_TYPE_I;
1836             ost->forced_kf_index++;
1837         }
1838         update_benchmark(NULL);
1839         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
1840         update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
1841         if (ret < 0) {
1842             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1843             exit_program(1);
1844         }
1845
1846         if (got_packet) {
1847             if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
1848                 pkt.pts = ost->sync_opts;
1849
1850             if (pkt.pts != AV_NOPTS_VALUE)
1851                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1852             if (pkt.dts != AV_NOPTS_VALUE)
1853                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1854
1855             if (debug_ts) {
1856                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1857                     "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1858                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1859                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1860             }
1861
1862             write_frame(s, &pkt, ost);
1863             frame_size = pkt.size;
1864             video_size += pkt.size;
1865             av_free_packet(&pkt);
1866
1867             /* if two pass, output log */
1868             if (ost->logfile && enc->stats_out) {
1869                 fprintf(ost->logfile, "%s", enc->stats_out);
1870             }
1871         }
1872     }
1873     ost->sync_opts++;
1874     /*
1875      * For video, number of frames in == number of packets out.
1876      * But there may be reordering, so we can't throw away frames on encoder
1877      * flush, we need to limit them here, before they go into encoder.
1878      */
1879     ost->frame_number++;
1880   }
1881
1882     if (vstats_filename && frame_size)
1883         do_video_stats(output_files[ost->file_index]->ctx, ost, frame_size);
1884 }
1885
1886 static double psnr(double d)
1887 {
1888     return -10.0 * log(d) / log(10.0);
1889 }
1890
1891 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1892                            int frame_size)
1893 {
1894     AVCodecContext *enc;
1895     int frame_number;
1896     double ti1, bitrate, avg_bitrate;
1897
1898     /* this is executed just the first time do_video_stats is called */
1899     if (!vstats_file) {
1900         vstats_file = fopen(vstats_filename, "w");
1901         if (!vstats_file) {
1902             perror("fopen");
1903             exit_program(1);
1904         }
1905     }
1906
1907     enc = ost->st->codec;
1908     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1909         frame_number = ost->frame_number;
1910         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1911         if (enc->flags&CODEC_FLAG_PSNR)
1912             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1913
1914         fprintf(vstats_file,"f_size= %6d ", frame_size);
1915         /* compute pts value */
1916         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1917         if (ti1 < 0.01)
1918             ti1 = 0.01;
1919
1920         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1921         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1922         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1923                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1924         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1925     }
1926 }
1927
1928 /* check for new output on any of the filtergraphs */
1929 static int poll_filters(void)
1930 {
1931     AVFilterBufferRef *picref;
1932     AVFrame *filtered_frame = NULL;
1933     int i, ret, ret_all;
1934     unsigned nb_success = 1, av_uninit(nb_eof);
1935     int64_t frame_pts;
1936
1937     while (1) {
1938         /* Reap all buffers present in the buffer sinks */
1939         for (i = 0; i < nb_output_streams; i++) {
1940             OutputStream *ost = output_streams[i];
1941             OutputFile    *of = output_files[ost->file_index];
1942             int ret = 0;
1943
1944             if (!ost->filter)
1945                 continue;
1946
1947             if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
1948                 return AVERROR(ENOMEM);
1949             } else
1950                 avcodec_get_frame_defaults(ost->filtered_frame);
1951             filtered_frame = ost->filtered_frame;
1952
1953             while (1) {
1954                 ret = av_buffersink_get_buffer_ref(ost->filter->filter, &picref,
1955                                                    AV_BUFFERSINK_FLAG_NO_REQUEST);
1956                 if (ret < 0) {
1957                     if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1958                         char buf[256];
1959                         av_strerror(ret, buf, sizeof(buf));
1960                         av_log(NULL, AV_LOG_WARNING,
1961                                "Error in av_buffersink_get_buffer_ref(): %s\n", buf);
1962                     }
1963                     break;
1964                 }
1965                 frame_pts = AV_NOPTS_VALUE;
1966                 if (picref->pts != AV_NOPTS_VALUE) {
1967                     filtered_frame->pts = frame_pts = av_rescale_q(picref->pts,
1968                                                     ost->filter->filter->inputs[0]->time_base,
1969                                                     ost->st->codec->time_base) -
1970                                         av_rescale_q(of->start_time,
1971                                                     AV_TIME_BASE_Q,
1972                                                     ost->st->codec->time_base);
1973
1974                     if (of->start_time && filtered_frame->pts < 0) {
1975                         avfilter_unref_buffer(picref);
1976                         continue;
1977                     }
1978                 }
1979                 //if (ost->source_index >= 0)
1980                 //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1981
1982
1983                 switch (ost->filter->filter->inputs[0]->type) {
1984                 case AVMEDIA_TYPE_VIDEO:
1985                     avfilter_copy_buf_props(filtered_frame, picref);
1986                     filtered_frame->pts = frame_pts;
1987                     if (!ost->frame_aspect_ratio)
1988                         ost->st->codec->sample_aspect_ratio = picref->video->sample_aspect_ratio;
1989
1990                     do_video_out(of->ctx, ost, filtered_frame,
1991                                  same_quant ? ost->last_quality :
1992                                               ost->st->codec->global_quality);
1993                     break;
1994                 case AVMEDIA_TYPE_AUDIO:
1995                     avfilter_copy_buf_props(filtered_frame, picref);
1996                     filtered_frame->pts = frame_pts;
1997                     do_audio_out(of->ctx, ost, filtered_frame);
1998                     break;
1999                 default:
2000                     // TODO support subtitle filters
2001                     av_assert0(0);
2002                 }
2003
2004                 avfilter_unref_buffer(picref);
2005             }
2006         }
2007         if (!nb_success) /* from last round */
2008             break;
2009         /* Request frames through all the graphs */
2010         ret_all = nb_success = nb_eof = 0;
2011         for (i = 0; i < nb_filtergraphs; i++) {
2012             ret = avfilter_graph_request_oldest(filtergraphs[i]->graph);
2013             if (!ret) {
2014                 nb_success++;
2015             } else if (ret == AVERROR_EOF) {
2016                 nb_eof++;
2017             } else if (ret != AVERROR(EAGAIN)) {
2018                 char buf[256];
2019                 av_strerror(ret, buf, sizeof(buf));
2020                 av_log(NULL, AV_LOG_WARNING,
2021                        "Error in request_frame(): %s\n", buf);
2022                 ret_all = ret;
2023             }
2024         }
2025         /* Try again if anything succeeded */
2026     }
2027     return nb_eof == nb_filtergraphs ? AVERROR_EOF : ret_all;
2028 }
2029
2030 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
2031 {
2032     char buf[1024];
2033     AVBPrint buf_script;
2034     OutputStream *ost;
2035     AVFormatContext *oc;
2036     int64_t total_size;
2037     AVCodecContext *enc;
2038     int frame_number, vid, i;
2039     double bitrate;
2040     int64_t pts = INT64_MAX;
2041     static int64_t last_time = -1;
2042     static int qp_histogram[52];
2043     int hours, mins, secs, us;
2044
2045     if (!print_stats && !is_last_report && !progress_avio)
2046         return;
2047
2048     if (!is_last_report) {
2049         if (last_time == -1) {
2050             last_time = cur_time;
2051             return;
2052         }
2053         if ((cur_time - last_time) < 500000)
2054             return;
2055         last_time = cur_time;
2056     }
2057
2058
2059     oc = output_files[0]->ctx;
2060
2061     total_size = avio_size(oc->pb);
2062     if (total_size < 0) { // FIXME improve avio_size() so it works with non seekable output too
2063         total_size = avio_tell(oc->pb);
2064         if (total_size < 0)
2065             total_size = 0;
2066     }
2067
2068     buf[0] = '\0';
2069     vid = 0;
2070     av_bprint_init(&buf_script, 0, 1);
2071     for (i = 0; i < nb_output_streams; i++) {
2072         float q = -1;
2073         ost = output_streams[i];
2074         enc = ost->st->codec;
2075         if (!ost->stream_copy && enc->coded_frame)
2076             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
2077         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2078             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
2079             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
2080                        ost->file_index, ost->index, q);
2081         }
2082         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2083             float fps, t = (cur_time-timer_start) / 1000000.0;
2084
2085             frame_number = ost->frame_number;
2086             fps = t > 1 ? frame_number / t : 0;
2087             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
2088                      frame_number, fps < 9.95, fps, q);
2089             av_bprintf(&buf_script, "frame=%d\n", frame_number);
2090             av_bprintf(&buf_script, "fps=%.1f\n", fps);
2091             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
2092                        ost->file_index, ost->index, q);
2093             if (is_last_report)
2094                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
2095             if (qp_hist) {
2096                 int j;
2097                 int qp = lrintf(q);
2098                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
2099                     qp_histogram[qp]++;
2100                 for (j = 0; j < 32; j++)
2101                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
2102             }
2103             if (enc->flags&CODEC_FLAG_PSNR) {
2104                 int j;
2105                 double error, error_sum = 0;
2106                 double scale, scale_sum = 0;
2107                 double p;
2108                 char type[3] = { 'Y','U','V' };
2109                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
2110                 for (j = 0; j < 3; j++) {
2111                     if (is_last_report) {
2112                         error = enc->error[j];
2113                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
2114                     } else {
2115                         error = enc->coded_frame->error[j];
2116                         scale = enc->width * enc->height * 255.0 * 255.0;
2117                     }
2118                     if (j)
2119                         scale /= 4;
2120                     error_sum += error;
2121                     scale_sum += scale;
2122                     p = psnr(error / scale);
2123                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], p);
2124                     av_bprintf(&buf_script, "stream_%d_%d_psnr_%c=%2.2f\n",
2125                                ost->file_index, ost->index, type[i] | 32, p);
2126                 }
2127                 p = psnr(error_sum / scale_sum);
2128                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
2129                 av_bprintf(&buf_script, "stream_%d_%d_psnr_all=%2.2f\n",
2130                            ost->file_index, ost->index, p);
2131             }
2132             vid = 1;
2133         }
2134         /* compute min output value */
2135         pts = FFMIN(pts, av_rescale_q(ost->st->pts.val,
2136                                       ost->st->time_base, AV_TIME_BASE_Q));
2137     }
2138
2139     secs = pts / AV_TIME_BASE;
2140     us = pts % AV_TIME_BASE;
2141     mins = secs / 60;
2142     secs %= 60;
2143     hours = mins / 60;
2144     mins %= 60;
2145
2146     bitrate = pts ? total_size * 8 / (pts / 1000.0) : 0;
2147
2148     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2149              "size=%8.0fkB time=", total_size / 1024.0);
2150     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2151              "%02d:%02d:%02d.%02d ", hours, mins, secs,
2152              (100 * us) / AV_TIME_BASE);
2153     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2154              "bitrate=%6.1fkbits/s", bitrate);
2155     av_bprintf(&buf_script, "total_size=%"PRId64"\n", total_size);
2156     av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
2157     av_bprintf(&buf_script, "out_time=%02d:%02d:%02d.%06d\n",
2158                hours, mins, secs, us);
2159
2160     if (nb_frames_dup || nb_frames_drop)
2161         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
2162                 nb_frames_dup, nb_frames_drop);
2163     av_bprintf(&buf_script, "dup_frames=%d\n", nb_frames_dup);
2164     av_bprintf(&buf_script, "drop_frames=%d\n", nb_frames_drop);
2165
2166     if (print_stats || is_last_report) {
2167     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
2168
2169     fflush(stderr);
2170     }
2171
2172     if (progress_avio) {
2173         av_bprintf(&buf_script, "progress=%s\n",
2174                    is_last_report ? "end" : "continue");
2175         avio_write(progress_avio, buf_script.str,
2176                    FFMIN(buf_script.len, buf_script.size - 1));
2177         avio_flush(progress_avio);
2178         av_bprint_finalize(&buf_script, NULL);
2179         if (is_last_report) {
2180             avio_close(progress_avio);
2181             progress_avio = NULL;
2182         }
2183     }
2184
2185     if (is_last_report) {
2186         int64_t raw= audio_size + video_size + subtitle_size + extra_size;
2187         av_log(NULL, AV_LOG_INFO, "\n");
2188         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB subtitle:%1.0f global headers:%1.0fkB muxing overhead %f%%\n",
2189                video_size / 1024.0,
2190                audio_size / 1024.0,
2191                subtitle_size / 1024.0,
2192                extra_size / 1024.0,
2193                100.0 * (total_size - raw) / raw
2194         );
2195         if(video_size + audio_size + subtitle_size + extra_size == 0){
2196             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
2197         }
2198     }
2199 }
2200
2201 static void flush_encoders(void)
2202 {
2203     int i, ret;
2204
2205     for (i = 0; i < nb_output_streams; i++) {
2206         OutputStream   *ost = output_streams[i];
2207         AVCodecContext *enc = ost->st->codec;
2208         AVFormatContext *os = output_files[ost->file_index]->ctx;
2209         int stop_encoding = 0;
2210
2211         if (!ost->encoding_needed)
2212             continue;
2213
2214         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
2215             continue;
2216         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
2217             continue;
2218
2219         for (;;) {
2220             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
2221             const char *desc;
2222             int64_t *size;
2223
2224             switch (ost->st->codec->codec_type) {
2225             case AVMEDIA_TYPE_AUDIO:
2226                 encode = avcodec_encode_audio2;
2227                 desc   = "Audio";
2228                 size   = &audio_size;
2229                 break;
2230             case AVMEDIA_TYPE_VIDEO:
2231                 encode = avcodec_encode_video2;
2232                 desc   = "Video";
2233                 size   = &video_size;
2234                 break;
2235             default:
2236                 stop_encoding = 1;
2237             }
2238
2239             if (encode) {
2240                 AVPacket pkt;
2241                 int got_packet;
2242                 av_init_packet(&pkt);
2243                 pkt.data = NULL;
2244                 pkt.size = 0;
2245
2246                 update_benchmark(NULL);
2247                 ret = encode(enc, &pkt, NULL, &got_packet);
2248                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
2249                 if (ret < 0) {
2250                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
2251                     exit_program(1);
2252                 }
2253                 *size += pkt.size;
2254                 if (ost->logfile && enc->stats_out) {
2255                     fprintf(ost->logfile, "%s", enc->stats_out);
2256                 }
2257                 if (!got_packet) {
2258                     stop_encoding = 1;
2259                     break;
2260                 }
2261                 if (pkt.pts != AV_NOPTS_VALUE)
2262                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
2263                 if (pkt.dts != AV_NOPTS_VALUE)
2264                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
2265                 write_frame(os, &pkt, ost);
2266             }
2267
2268             if (stop_encoding)
2269                 break;
2270         }
2271     }
2272 }
2273
2274 /*
2275  * Check whether a packet from ist should be written into ost at this time
2276  */
2277 static int check_output_constraints(InputStream *ist, OutputStream *ost)
2278 {
2279     OutputFile *of = output_files[ost->file_index];
2280     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
2281
2282     if (ost->source_index != ist_index)
2283         return 0;
2284
2285     if (of->start_time && ist->pts < of->start_time)
2286         return 0;
2287
2288     return 1;
2289 }
2290
2291 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
2292 {
2293     OutputFile *of = output_files[ost->file_index];
2294     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
2295     AVPicture pict;
2296     AVPacket opkt;
2297
2298     av_init_packet(&opkt);
2299
2300     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
2301         !ost->copy_initial_nonkeyframes)
2302         return;
2303
2304     if (of->recording_time != INT64_MAX &&
2305         ist->pts >= of->recording_time + of->start_time) {
2306         ost->is_past_recording_time = 1;
2307         return;
2308     }
2309
2310     /* force the input stream PTS */
2311     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2312         audio_size += pkt->size;
2313     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2314         video_size += pkt->size;
2315         ost->sync_opts++;
2316     } else if (ost->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2317         subtitle_size += pkt->size;
2318     }
2319
2320     if (pkt->pts != AV_NOPTS_VALUE)
2321         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
2322     else
2323         opkt.pts = AV_NOPTS_VALUE;
2324
2325     if (pkt->dts == AV_NOPTS_VALUE)
2326         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
2327     else
2328         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
2329     opkt.dts -= ost_tb_start_time;
2330
2331     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
2332     opkt.flags    = pkt->flags;
2333
2334     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
2335     if (  ost->st->codec->codec_id != CODEC_ID_H264
2336        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
2337        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
2338        && ost->st->codec->codec_id != CODEC_ID_VC1
2339        ) {
2340         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
2341             opkt.destruct = av_destruct_packet;
2342     } else {
2343         opkt.data = pkt->data;
2344         opkt.size = pkt->size;
2345     }
2346
2347     if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (of->ctx->oformat->flags & AVFMT_RAWPICTURE)) {
2348         /* store AVPicture in AVPacket, as expected by the output format */
2349         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
2350         opkt.data = (uint8_t *)&pict;
2351         opkt.size = sizeof(AVPicture);
2352         opkt.flags |= AV_PKT_FLAG_KEY;
2353     }
2354
2355     write_frame(of->ctx, &opkt, ost);
2356     ost->st->codec->frame_number++;
2357     av_free_packet(&opkt);
2358 }
2359
2360 static void rate_emu_sleep(InputStream *ist)
2361 {
2362     if (input_files[ist->file_index]->rate_emu) {
2363         int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
2364         int64_t now = av_gettime() - ist->start;
2365         if (pts > now)
2366             av_usleep(pts - now);
2367     }
2368 }
2369
2370 static int guess_input_channel_layout(InputStream *ist)
2371 {
2372     AVCodecContext *dec = ist->st->codec;
2373
2374     if (!dec->channel_layout) {
2375         char layout_name[256];
2376
2377         dec->channel_layout = av_get_default_channel_layout(dec->channels);
2378         if (!dec->channel_layout)
2379             return 0;
2380         av_get_channel_layout_string(layout_name, sizeof(layout_name),
2381                                      dec->channels, dec->channel_layout);
2382         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
2383                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
2384     }
2385     return 1;
2386 }
2387
2388 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
2389 {
2390     AVFrame *decoded_frame;
2391     AVCodecContext *avctx = ist->st->codec;
2392     int i, ret, resample_changed;
2393     AVRational decoded_frame_tb;
2394
2395     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2396         return AVERROR(ENOMEM);
2397     else
2398         avcodec_get_frame_defaults(ist->decoded_frame);
2399     decoded_frame = ist->decoded_frame;
2400
2401     update_benchmark(NULL);
2402     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
2403     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
2404     if (ret < 0) {
2405         return ret;
2406     }
2407     if (avctx->sample_rate <= 0) {
2408         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
2409         return AVERROR_INVALIDDATA;
2410     }
2411
2412     if (!*got_output) {
2413         /* no audio frame */
2414         if (!pkt->size)
2415             for (i = 0; i < ist->nb_filters; i++)
2416                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL,
2417                                      AV_BUFFERSRC_FLAG_NO_COPY);
2418         return ret;
2419     }
2420
2421 #if 1
2422     /* increment next_dts to use for the case where the input stream does not
2423        have timestamps or there are multiple frames in the packet */
2424     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2425                      avctx->sample_rate;
2426     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2427                      avctx->sample_rate;
2428 #endif
2429
2430     rate_emu_sleep(ist);
2431
2432     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
2433                        ist->resample_channels       != avctx->channels               ||
2434                        ist->resample_channel_layout != decoded_frame->channel_layout ||
2435                        ist->resample_sample_rate    != decoded_frame->sample_rate;
2436     if (resample_changed) {
2437         char layout1[64], layout2[64];
2438
2439         if (!guess_input_channel_layout(ist)) {
2440             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
2441                    "layout for Input Stream #%d.%d\n", ist->file_index,
2442                    ist->st->index);
2443             exit_program(1);
2444         }
2445         decoded_frame->channel_layout = avctx->channel_layout;
2446
2447         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
2448                                      ist->resample_channel_layout);
2449         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
2450                                      decoded_frame->channel_layout);
2451
2452         av_log(NULL, AV_LOG_INFO,
2453                "Input stream #%d:%d frame changed from rate:%d fmt:%s ch:%d chl:%s to rate:%d fmt:%s ch:%d chl:%s\n",
2454                ist->file_index, ist->st->index,
2455                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2456                ist->resample_channels, layout1,
2457                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2458                avctx->channels, layout2);
2459
2460         ist->resample_sample_fmt     = decoded_frame->format;
2461         ist->resample_sample_rate    = decoded_frame->sample_rate;
2462         ist->resample_channel_layout = decoded_frame->channel_layout;
2463         ist->resample_channels       = avctx->channels;
2464
2465         for (i = 0; i < nb_filtergraphs; i++)
2466             if (ist_in_filtergraph(filtergraphs[i], ist)) {
2467                 FilterGraph *fg = filtergraphs[i];
2468                 int j;
2469                 if (configure_filtergraph(fg) < 0) {
2470                     av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2471                     exit_program(1);
2472                 }
2473                 for (j = 0; j < fg->nb_outputs; j++) {
2474                     OutputStream *ost = fg->outputs[j]->ost;
2475                     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2476                         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
2477                         av_buffersink_set_frame_size(ost->filter->filter,
2478                                                      ost->st->codec->frame_size);
2479                 }
2480             }
2481     }
2482
2483     /* if the decoder provides a pts, use it instead of the last packet pts.
2484        the decoder could be delaying output by a packet or more. */
2485     if (decoded_frame->pts != AV_NOPTS_VALUE) {
2486         ist->dts = ist->next_dts = ist->pts = ist->next_pts = av_rescale_q(decoded_frame->pts, avctx->time_base, AV_TIME_BASE_Q);
2487         decoded_frame_tb   = avctx->time_base;
2488     } else if (decoded_frame->pkt_pts != AV_NOPTS_VALUE) {
2489         decoded_frame->pts = decoded_frame->pkt_pts;
2490         pkt->pts           = AV_NOPTS_VALUE;
2491         decoded_frame_tb   = ist->st->time_base;
2492     } else if (pkt->pts != AV_NOPTS_VALUE) {
2493         decoded_frame->pts = pkt->pts;
2494         pkt->pts           = AV_NOPTS_VALUE;
2495         decoded_frame_tb   = ist->st->time_base;
2496     }else {
2497         decoded_frame->pts = ist->dts;
2498         decoded_frame_tb   = AV_TIME_BASE_Q;
2499     }
2500     if (decoded_frame->pts != AV_NOPTS_VALUE)
2501         decoded_frame->pts = av_rescale_q(decoded_frame->pts,
2502                                           decoded_frame_tb,
2503                                           (AVRational){1, ist->st->codec->sample_rate});
2504     for (i = 0; i < ist->nb_filters; i++)
2505         av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, 0);
2506
2507     decoded_frame->pts = AV_NOPTS_VALUE;
2508
2509     return ret;
2510 }
2511
2512 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
2513 {
2514     AVFrame *decoded_frame;
2515     void *buffer_to_free = NULL;
2516     int i, ret = 0, resample_changed;
2517     int64_t best_effort_timestamp;
2518     AVRational *frame_sample_aspect;
2519     float quality;
2520
2521     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2522         return AVERROR(ENOMEM);
2523     else
2524         avcodec_get_frame_defaults(ist->decoded_frame);
2525     decoded_frame = ist->decoded_frame;
2526     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
2527
2528     update_benchmark(NULL);
2529     ret = avcodec_decode_video2(ist->st->codec,
2530                                 decoded_frame, got_output, pkt);
2531     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
2532     if (ret < 0)
2533         return ret;
2534
2535     quality = same_quant ? decoded_frame->quality : 0;
2536     if (!*got_output) {
2537         /* no picture yet */
2538         if (!pkt->size)
2539             for (i = 0; i < ist->nb_filters; i++)
2540                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, AV_BUFFERSRC_FLAG_NO_COPY);
2541         return ret;
2542     }
2543
2544     if(ist->top_field_first>=0)
2545         decoded_frame->top_field_first = ist->top_field_first;
2546
2547     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
2548     if(best_effort_timestamp != AV_NOPTS_VALUE)
2549         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
2550
2551     if (debug_ts) {
2552         av_log(NULL, AV_LOG_INFO, "decoder -> ist_index:%d type:video "
2553                 "frame_pts:%s frame_pts_time:%s best_effort_ts:%"PRId64" best_effort_ts_time:%s keyframe:%d frame_type:%d \n",
2554                 ist->st->index, av_ts2str(decoded_frame->pts),
2555                 av_ts2timestr(decoded_frame->pts, &ist->st->time_base),
2556                 best_effort_timestamp,
2557                 av_ts2timestr(best_effort_timestamp, &ist->st->time_base),
2558                 decoded_frame->key_frame, decoded_frame->pict_type);
2559     }
2560
2561     pkt->size = 0;
2562     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2563
2564     rate_emu_sleep(ist);
2565
2566     if (ist->st->sample_aspect_ratio.num)
2567         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2568
2569     resample_changed = ist->resample_width   != decoded_frame->width  ||
2570                        ist->resample_height  != decoded_frame->height ||
2571                        ist->resample_pix_fmt != decoded_frame->format;
2572     if (resample_changed) {
2573         av_log(NULL, AV_LOG_INFO,
2574                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2575                ist->file_index, ist->st->index,
2576                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2577                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2578
2579         ist->resample_width   = decoded_frame->width;
2580         ist->resample_height  = decoded_frame->height;
2581         ist->resample_pix_fmt = decoded_frame->format;
2582
2583         for (i = 0; i < nb_filtergraphs; i++)
2584             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2585                 configure_filtergraph(filtergraphs[i]) < 0) {
2586                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2587                 exit_program(1);
2588             }
2589     }
2590
2591     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2592     for (i = 0; i < ist->nb_filters; i++) {
2593         int changed =      ist->st->codec->width   != ist->filters[i]->filter->outputs[0]->w
2594                         || ist->st->codec->height  != ist->filters[i]->filter->outputs[0]->h
2595                         || ist->st->codec->pix_fmt != ist->filters[i]->filter->outputs[0]->format;
2596         // XXX what an ugly hack
2597         if (ist->filters[i]->graph->nb_outputs == 1)
2598             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2599
2600         if (!frame_sample_aspect->num)
2601             *frame_sample_aspect = ist->st->sample_aspect_ratio;
2602         if (ist->dr1 && decoded_frame->type==FF_BUFFER_TYPE_USER && !changed) {
2603             FrameBuffer      *buf = decoded_frame->opaque;
2604             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2605                                         decoded_frame->data, decoded_frame->linesize,
2606                                         AV_PERM_READ | AV_PERM_PRESERVE,
2607                                         ist->st->codec->width, ist->st->codec->height,
2608                                         ist->st->codec->pix_fmt);
2609
2610             avfilter_copy_frame_props(fb, decoded_frame);
2611             fb->buf->priv           = buf;
2612             fb->buf->free           = filter_release_buffer;
2613
2614             av_assert0(buf->refcount>0);
2615             buf->refcount++;
2616             av_buffersrc_add_ref(ist->filters[i]->filter, fb,
2617                                  AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT |
2618                                  AV_BUFFERSRC_FLAG_NO_COPY);
2619         } else
2620         if(av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, 0)<0) {
2621             av_log(NULL, AV_LOG_FATAL, "Failed to inject frame into filter network\n");
2622             exit_program(1);
2623         }
2624
2625     }
2626
2627     av_free(buffer_to_free);
2628     return ret;
2629 }
2630
2631 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2632 {
2633     AVSubtitle subtitle;
2634     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2635                                           &subtitle, got_output, pkt);
2636     if (ret < 0)
2637         return ret;
2638     if (!*got_output)
2639         return ret;
2640
2641     rate_emu_sleep(ist);
2642
2643     for (i = 0; i < nb_output_streams; i++) {
2644         OutputStream *ost = output_streams[i];
2645
2646         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2647             continue;
2648
2649         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2650     }
2651
2652     avsubtitle_free(&subtitle);
2653     return ret;
2654 }
2655
2656 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2657 static int output_packet(InputStream *ist, const AVPacket *pkt)
2658 {
2659     int ret = 0, i;
2660     int got_output;
2661
2662     AVPacket avpkt;
2663     if (!ist->saw_first_ts) {
2664         ist->dts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
2665         ist->pts = 0;
2666         if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
2667             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2668             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
2669         }
2670         ist->saw_first_ts = 1;
2671     }
2672
2673     if (ist->next_dts == AV_NOPTS_VALUE)
2674         ist->next_dts = ist->dts;
2675     if (ist->next_pts == AV_NOPTS_VALUE)
2676         ist->next_pts = ist->pts;
2677
2678     if (pkt == NULL) {
2679         /* EOF handling */
2680         av_init_packet(&avpkt);
2681         avpkt.data = NULL;
2682         avpkt.size = 0;
2683         goto handle_eof;
2684     } else {
2685         avpkt = *pkt;
2686     }
2687
2688     if (pkt->dts != AV_NOPTS_VALUE) {
2689         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2690         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2691             ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2692     }
2693
2694     // while we have more to decode or while the decoder did output something on EOF
2695     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2696         int duration;
2697     handle_eof:
2698
2699         ist->pts = ist->next_pts;
2700         ist->dts = ist->next_dts;
2701
2702         if (avpkt.size && avpkt.size != pkt->size) {
2703             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2704                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2705             ist->showed_multi_packet_warning = 1;
2706         }
2707
2708         switch (ist->st->codec->codec_type) {
2709         case AVMEDIA_TYPE_AUDIO:
2710             ret = decode_audio    (ist, &avpkt, &got_output);
2711             break;
2712         case AVMEDIA_TYPE_VIDEO:
2713             ret = decode_video    (ist, &avpkt, &got_output);
2714             if (avpkt.duration) {
2715                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2716             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
2717                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
2718                 duration = ((int64_t)AV_TIME_BASE *
2719                                 ist->st->codec->time_base.num * ticks) /
2720                                 ist->st->codec->time_base.den;
2721             } else
2722                 duration = 0;
2723
2724             if(ist->dts != AV_NOPTS_VALUE && duration) {
2725                 ist->next_dts += duration;
2726             }else
2727                 ist->next_dts = AV_NOPTS_VALUE;
2728
2729             if (got_output)
2730                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
2731             break;
2732         case AVMEDIA_TYPE_SUBTITLE:
2733             ret = transcode_subtitles(ist, &avpkt, &got_output);
2734             break;
2735         default:
2736             return -1;
2737         }
2738
2739         if (ret < 0)
2740             return ret;
2741
2742         avpkt.dts=
2743         avpkt.pts= AV_NOPTS_VALUE;
2744
2745         // touch data and size only if not EOF
2746         if (pkt) {
2747             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
2748                 ret = avpkt.size;
2749             avpkt.data += ret;
2750             avpkt.size -= ret;
2751         }
2752         if (!got_output) {
2753             continue;
2754         }
2755     }
2756
2757     /* handle stream copy */
2758     if (!ist->decoding_needed) {
2759         rate_emu_sleep(ist);
2760         ist->dts = ist->next_dts;
2761         switch (ist->st->codec->codec_type) {
2762         case AVMEDIA_TYPE_AUDIO:
2763             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2764                              ist->st->codec->sample_rate;
2765             break;
2766         case AVMEDIA_TYPE_VIDEO:
2767             if (pkt->duration) {
2768                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2769             } else if(ist->st->codec->time_base.num != 0) {
2770                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2771                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2772                                   ist->st->codec->time_base.num * ticks) /
2773                                   ist->st->codec->time_base.den;
2774             }
2775             break;
2776         }
2777         ist->pts = ist->dts;
2778         ist->next_pts = ist->next_dts;
2779     }
2780     for (i = 0; pkt && i < nb_output_streams; i++) {
2781         OutputStream *ost = output_streams[i];
2782
2783         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2784             continue;
2785
2786         do_streamcopy(ist, ost, pkt);
2787     }
2788
2789     return 0;
2790 }
2791
2792 static void print_sdp(void)
2793 {
2794     char sdp[2048];
2795     int i;
2796     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2797
2798     if (!avc)
2799         exit_program(1);
2800     for (i = 0; i < nb_output_files; i++)
2801         avc[i] = output_files[i]->ctx;
2802
2803     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2804     printf("SDP:\n%s\n", sdp);
2805     fflush(stdout);
2806     av_freep(&avc);
2807 }
2808
2809 static int init_input_stream(int ist_index, char *error, int error_len)
2810 {
2811     InputStream *ist = input_streams[ist_index];
2812
2813     if (ist->decoding_needed) {
2814         AVCodec *codec = ist->dec;
2815         if (!codec) {
2816             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2817                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
2818             return AVERROR(EINVAL);
2819         }
2820
2821         ist->dr1 = (codec->capabilities & CODEC_CAP_DR1) && !do_deinterlace;
2822         if (codec->type == AVMEDIA_TYPE_VIDEO && ist->dr1) {
2823             ist->st->codec->get_buffer     = codec_get_buffer;
2824             ist->st->codec->release_buffer = codec_release_buffer;
2825             ist->st->codec->opaque         = &ist->buffer_pool;
2826         }
2827
2828         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2829             av_dict_set(&ist->opts, "threads", "auto", 0);
2830         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2831             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2832                     ist->file_index, ist->st->index);
2833             return AVERROR(EINVAL);
2834         }
2835         assert_codec_experimental(ist->st->codec, 0);
2836         assert_avoptions(ist->opts);
2837     }
2838
2839     ist->next_pts = AV_NOPTS_VALUE;
2840     ist->next_dts = AV_NOPTS_VALUE;
2841     ist->is_start = 1;
2842
2843     return 0;
2844 }
2845
2846 static InputStream *get_input_stream(OutputStream *ost)
2847 {
2848     if (ost->source_index >= 0)
2849         return input_streams[ost->source_index];
2850     return NULL;
2851 }
2852
2853 static void parse_forced_key_frames(char *kf, OutputStream *ost,
2854                                     AVCodecContext *avctx)
2855 {
2856     char *p;
2857     int n = 1, i;
2858     int64_t t;
2859
2860     for (p = kf; *p; p++)
2861         if (*p == ',')
2862             n++;
2863     ost->forced_kf_count = n;
2864     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
2865     if (!ost->forced_kf_pts) {
2866         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
2867         exit_program(1);
2868     }
2869
2870     p = kf;
2871     for (i = 0; i < n; i++) {
2872         char *next = strchr(p, ',');
2873
2874         if (next)
2875             *next++ = 0;
2876
2877         t = parse_time_or_die("force_key_frames", p, 1);
2878         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2879
2880         p = next;
2881     }
2882 }
2883
2884 static void report_new_stream(int input_index, AVPacket *pkt)
2885 {
2886     InputFile *file = input_files[input_index];
2887     AVStream *st = file->ctx->streams[pkt->stream_index];
2888
2889     if (pkt->stream_index < file->nb_streams_warn)
2890         return;
2891     av_log(file->ctx, AV_LOG_WARNING,
2892            "New %s stream %d:%d at pos:%"PRId64" and DTS:%ss\n",
2893            av_get_media_type_string(st->codec->codec_type),
2894            input_index, pkt->stream_index,
2895            pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
2896     file->nb_streams_warn = pkt->stream_index + 1;
2897 }
2898
2899 static int transcode_init(void)
2900 {
2901     int ret = 0, i, j, k;
2902     AVFormatContext *oc;
2903     AVCodecContext *codec, *icodec = NULL;
2904     OutputStream *ost;
2905     InputStream *ist;
2906     char error[1024];
2907     int want_sdp = 1;
2908
2909     /* init framerate emulation */
2910     for (i = 0; i < nb_input_files; i++) {
2911         InputFile *ifile = input_files[i];
2912         if (ifile->rate_emu)
2913             for (j = 0; j < ifile->nb_streams; j++)
2914                 input_streams[j + ifile->ist_index]->start = av_gettime();
2915     }
2916
2917     /* output stream init */
2918     for (i = 0; i < nb_output_files; i++) {
2919         oc = output_files[i]->ctx;
2920         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2921             av_dump_format(oc, i, oc->filename, 1);
2922             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2923             return AVERROR(EINVAL);
2924         }
2925     }
2926
2927     /* init complex filtergraphs */
2928     for (i = 0; i < nb_filtergraphs; i++)
2929         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2930             return ret;
2931
2932     /* for each output stream, we compute the right encoding parameters */
2933     for (i = 0; i < nb_output_streams; i++) {
2934         ost = output_streams[i];
2935         oc  = output_files[ost->file_index]->ctx;
2936         ist = get_input_stream(ost);
2937
2938         if (ost->attachment_filename)
2939             continue;
2940
2941         codec  = ost->st->codec;
2942
2943         if (ist) {
2944             icodec = ist->st->codec;
2945
2946             ost->st->disposition          = ist->st->disposition;
2947             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2948             codec->chroma_sample_location = icodec->chroma_sample_location;
2949         }
2950
2951         if (ost->stream_copy) {
2952             uint64_t extra_size;
2953
2954             av_assert0(ist && !ost->filter);
2955
2956             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2957
2958             if (extra_size > INT_MAX) {
2959                 return AVERROR(EINVAL);
2960             }
2961
2962             /* if stream_copy is selected, no need to decode or encode */
2963             codec->codec_id   = icodec->codec_id;
2964             codec->codec_type = icodec->codec_type;
2965
2966             if (!codec->codec_tag) {
2967                 if (!oc->oformat->codec_tag ||
2968                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2969                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2970                     codec->codec_tag = icodec->codec_tag;
2971             }
2972
2973             codec->bit_rate       = icodec->bit_rate;
2974             codec->rc_max_rate    = icodec->rc_max_rate;
2975             codec->rc_buffer_size = icodec->rc_buffer_size;
2976             codec->field_order    = icodec->field_order;
2977             codec->extradata      = av_mallocz(extra_size);
2978             if (!codec->extradata) {
2979                 return AVERROR(ENOMEM);
2980             }
2981             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2982             codec->extradata_size= icodec->extradata_size;
2983             codec->bits_per_coded_sample  = icodec->bits_per_coded_sample;
2984
2985             codec->time_base = ist->st->time_base;
2986             /*
2987              * Avi is a special case here because it supports variable fps but
2988              * having the fps and timebase differe significantly adds quite some
2989              * overhead
2990              */
2991             if(!strcmp(oc->oformat->name, "avi")) {
2992                 if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
2993                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
2994                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(icodec->time_base)
2995                                && av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(icodec->time_base) < 1.0/500
2996                      || copy_tb==2){
2997                     codec->time_base.num = ist->st->r_frame_rate.den;
2998                     codec->time_base.den = 2*ist->st->r_frame_rate.num;
2999                     codec->ticks_per_frame = 2;
3000                 } else if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
3001                                  && av_q2d(ist->st->time_base) < 1.0/500
3002                     || copy_tb==0){
3003                     codec->time_base = icodec->time_base;
3004                     codec->time_base.num *= icodec->ticks_per_frame;
3005                     codec->time_base.den *= 2;
3006                     codec->ticks_per_frame = 2;
3007                 }
3008             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
3009                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
3010                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
3011             ) {
3012                 if(   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
3013                                 && av_q2d(ist->st->time_base) < 1.0/500
3014                    || copy_tb==0){
3015                     codec->time_base = icodec->time_base;
3016                     codec->time_base.num *= icodec->ticks_per_frame;
3017                 }
3018             }
3019
3020             if(ost->frame_rate.num)
3021                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
3022
3023             av_reduce(&codec->time_base.num, &codec->time_base.den,
3024                         codec->time_base.num, codec->time_base.den, INT_MAX);
3025
3026             switch (codec->codec_type) {
3027             case AVMEDIA_TYPE_AUDIO:
3028                 if (audio_volume != 256) {
3029                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
3030                     exit_program(1);
3031                 }
3032                 codec->channel_layout     = icodec->channel_layout;
3033                 codec->sample_rate        = icodec->sample_rate;
3034                 codec->channels           = icodec->channels;
3035                 codec->frame_size         = icodec->frame_size;
3036                 codec->audio_service_type = icodec->audio_service_type;
3037                 codec->block_align        = icodec->block_align;
3038                 if((codec->block_align == 1 || codec->block_align == 1152) && codec->codec_id == CODEC_ID_MP3)
3039                     codec->block_align= 0;
3040                 if(codec->codec_id == CODEC_ID_AC3)
3041                     codec->block_align= 0;
3042                 break;
3043             case AVMEDIA_TYPE_VIDEO:
3044                 codec->pix_fmt            = icodec->pix_fmt;
3045                 codec->width              = icodec->width;
3046                 codec->height             = icodec->height;
3047                 codec->has_b_frames       = icodec->has_b_frames;
3048                 if (!codec->sample_aspect_ratio.num) {
3049                     codec->sample_aspect_ratio   =
3050                     ost->st->sample_aspect_ratio =
3051                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
3052                         ist->st->codec->sample_aspect_ratio.num ?
3053                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
3054                 }
3055                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
3056                 break;
3057             case AVMEDIA_TYPE_SUBTITLE:
3058                 codec->width  = icodec->width;
3059                 codec->height = icodec->height;
3060                 break;
3061             case AVMEDIA_TYPE_DATA:
3062             case AVMEDIA_TYPE_ATTACHMENT:
3063                 break;
3064             default:
3065                 abort();
3066             }
3067         } else {
3068             if (!ost->enc)
3069                 ost->enc = avcodec_find_encoder(codec->codec_id);
3070             if (!ost->enc) {
3071                 /* should only happen when a default codec is not present. */
3072                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
3073                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
3074                 ret = AVERROR(EINVAL);
3075                 goto dump_format;
3076             }
3077
3078             if (ist)
3079                 ist->decoding_needed = 1;
3080             ost->encoding_needed = 1;
3081
3082             if (!ost->filter &&
3083                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3084                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
3085                     FilterGraph *fg;
3086                     fg = init_simple_filtergraph(ist, ost);
3087                     if (configure_filtergraph(fg)) {
3088                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
3089                         exit(1);
3090                     }
3091             }
3092
3093             if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3094                 if (ost->filter && !ost->frame_rate.num)
3095                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
3096                 if (ist && !ost->frame_rate.num)
3097                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
3098 //                    ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
3099                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
3100                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
3101                     ost->frame_rate = ost->enc->supported_framerates[idx];
3102                 }
3103             }
3104
3105             switch (codec->codec_type) {
3106             case AVMEDIA_TYPE_AUDIO:
3107                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
3108                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
3109                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
3110                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
3111                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
3112                 break;
3113             case AVMEDIA_TYPE_VIDEO:
3114                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
3115                 if (ost->filter && !(codec->time_base.num && codec->time_base.den))
3116                     codec->time_base = ost->filter->filter->inputs[0]->time_base;
3117                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
3118                    && (video_sync_method == VSYNC_CFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
3119                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
3120                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
3121                 }
3122                 for (j = 0; j < ost->forced_kf_count; j++)
3123                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
3124                                                          AV_TIME_BASE_Q,
3125                                                          codec->time_base);
3126
3127                 codec->width  = ost->filter->filter->inputs[0]->w;
3128                 codec->height = ost->filter->filter->inputs[0]->h;
3129                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
3130                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
3131                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
3132                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
3133                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
3134
3135                 if (!icodec ||
3136                     codec->width   != icodec->width  ||
3137                     codec->height  != icodec->height ||
3138                     codec->pix_fmt != icodec->pix_fmt) {
3139                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
3140                 }
3141
3142                 if (ost->forced_keyframes)
3143                     parse_forced_key_frames(ost->forced_keyframes, ost,
3144                                             ost->st->codec);
3145                 break;
3146             case AVMEDIA_TYPE_SUBTITLE:
3147                 codec->time_base = (AVRational){1, 1000};
3148                 break;
3149             default:
3150                 abort();
3151                 break;
3152             }
3153             /* two pass mode */
3154             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
3155                 char logfilename[1024];
3156                 FILE *f;
3157
3158                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
3159                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
3160                          i);
3161                 if (!strcmp(ost->enc->name, "libx264")) {
3162                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
3163                 } else {
3164                     if (codec->flags & CODEC_FLAG_PASS2) {
3165                         char  *logbuffer;
3166                         size_t logbuffer_size;
3167                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
3168                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
3169                                    logfilename);
3170                             exit_program(1);
3171                         }
3172                         codec->stats_in = logbuffer;
3173                     }
3174                     if (codec->flags & CODEC_FLAG_PASS1) {
3175                         f = fopen(logfilename, "wb");
3176                         if (!f) {
3177                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
3178                                 logfilename, strerror(errno));
3179                             exit_program(1);
3180                         }
3181                         ost->logfile = f;
3182                     }
3183                 }
3184             }
3185         }
3186     }
3187
3188     /* open each encoder */
3189     for (i = 0; i < nb_output_streams; i++) {
3190         ost = output_streams[i];
3191         if (ost->encoding_needed) {
3192             AVCodec      *codec = ost->enc;
3193             AVCodecContext *dec = NULL;
3194
3195             if ((ist = get_input_stream(ost)))
3196                 dec = ist->st->codec;
3197             if (dec && dec->subtitle_header) {
3198                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
3199                 if (!ost->st->codec->subtitle_header) {
3200                     ret = AVERROR(ENOMEM);
3201                     goto dump_format;
3202                 }
3203                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
3204                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
3205             }
3206             if (!av_dict_get(ost->opts, "threads", NULL, 0))
3207                 av_dict_set(&ost->opts, "threads", "auto", 0);
3208             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
3209                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
3210                         ost->file_index, ost->index);
3211                 ret = AVERROR(EINVAL);
3212                 goto dump_format;
3213             }
3214             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
3215                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
3216                 av_buffersink_set_frame_size(ost->filter->filter,
3217                                              ost->st->codec->frame_size);
3218             assert_codec_experimental(ost->st->codec, 1);
3219             assert_avoptions(ost->opts);
3220             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
3221                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
3222                                              " It takes bits/s as argument, not kbits/s\n");
3223             extra_size += ost->st->codec->extradata_size;
3224
3225             if (ost->st->codec->me_threshold)
3226                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
3227         }
3228     }
3229
3230     /* init input streams */
3231     for (i = 0; i < nb_input_streams; i++)
3232         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
3233             goto dump_format;
3234
3235     /* discard unused programs */
3236     for (i = 0; i < nb_input_files; i++) {
3237         InputFile *ifile = input_files[i];
3238         for (j = 0; j < ifile->ctx->nb_programs; j++) {
3239             AVProgram *p = ifile->ctx->programs[j];
3240             int discard  = AVDISCARD_ALL;
3241
3242             for (k = 0; k < p->nb_stream_indexes; k++)
3243                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
3244                     discard = AVDISCARD_DEFAULT;
3245                     break;
3246                 }
3247             p->discard = discard;
3248         }
3249     }
3250
3251     /* open files and write file headers */
3252     for (i = 0; i < nb_output_files; i++) {
3253         oc = output_files[i]->ctx;
3254         oc->interrupt_callback = int_cb;
3255         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
3256             char errbuf[128];
3257             const char *errbuf_ptr = errbuf;
3258             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
3259                 errbuf_ptr = strerror(AVUNERROR(ret));
3260             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
3261             ret = AVERROR(EINVAL);
3262             goto dump_format;
3263         }
3264 //         assert_avoptions(output_files[i]->opts);
3265         if (strcmp(oc->oformat->name, "rtp")) {
3266             want_sdp = 0;
3267         }
3268     }
3269
3270  dump_format:
3271     /* dump the file output parameters - cannot be done before in case
3272        of stream copy */
3273     for (i = 0; i < nb_output_files; i++) {
3274         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
3275     }
3276
3277     /* dump the stream mapping */
3278     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
3279     for (i = 0; i < nb_input_streams; i++) {
3280         ist = input_streams[i];
3281
3282         for (j = 0; j < ist->nb_filters; j++) {
3283             if (ist->filters[j]->graph->graph_desc) {
3284                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
3285                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
3286                        ist->filters[j]->name);
3287                 if (nb_filtergraphs > 1)
3288                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
3289                 av_log(NULL, AV_LOG_INFO, "\n");
3290             }
3291         }
3292     }
3293
3294     for (i = 0; i < nb_output_streams; i++) {
3295         ost = output_streams[i];
3296
3297         if (ost->attachment_filename) {
3298             /* an attached file */
3299             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
3300                    ost->attachment_filename, ost->file_index, ost->index);
3301             continue;
3302         }
3303
3304         if (ost->filter && ost->filter->graph->graph_desc) {
3305             /* output from a complex graph */
3306             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
3307             if (nb_filtergraphs > 1)
3308                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
3309
3310             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
3311                    ost->index, ost->enc ? ost->enc->name : "?");
3312             continue;
3313         }
3314
3315         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
3316                input_streams[ost->source_index]->file_index,
3317                input_streams[ost->source_index]->st->index,
3318                ost->file_index,
3319                ost->index);
3320         if (ost->sync_ist != input_streams[ost->source_index])
3321             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
3322                    ost->sync_ist->file_index,
3323                    ost->sync_ist->st->index);
3324         if (ost->stream_copy)
3325             av_log(NULL, AV_LOG_INFO, " (copy)");
3326         else
3327             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
3328                    input_streams[ost->source_index]->dec->name : "?",
3329                    ost->enc ? ost->enc->name : "?");
3330         av_log(NULL, AV_LOG_INFO, "\n");
3331     }
3332
3333     if (ret) {
3334         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
3335         return ret;
3336     }
3337
3338     if (want_sdp) {
3339         print_sdp();
3340     }
3341
3342     return 0;
3343 }
3344
3345 /**
3346  * @return 1 if there are still streams where more output is wanted,
3347  *         0 otherwise
3348  */
3349 static int need_output(void)
3350 {
3351     int i;
3352
3353     for (i = 0; i < nb_output_streams; i++) {
3354         OutputStream *ost    = output_streams[i];
3355         OutputFile *of       = output_files[ost->file_index];
3356         AVFormatContext *os  = output_files[ost->file_index]->ctx;
3357
3358         if (ost->is_past_recording_time ||
3359             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3360             continue;
3361         if (ost->frame_number >= ost->max_frames) {
3362             int j;
3363             for (j = 0; j < of->ctx->nb_streams; j++)
3364                 output_streams[of->ost_index + j]->is_past_recording_time = 1;
3365             continue;
3366         }
3367
3368         return 1;
3369     }
3370
3371     return 0;
3372 }
3373
3374 static int input_acceptable(InputStream *ist)
3375 {
3376     av_assert1(!ist->discard);
3377     return !input_files[ist->file_index]->unavailable &&
3378            !input_files[ist->file_index]->eof_reached;
3379 }
3380
3381 static int find_graph_input(FilterGraph *graph)
3382 {
3383     int i, nb_req_max = 0, file_index = -1;
3384
3385     for (i = 0; i < graph->nb_inputs; i++) {
3386         int nb_req = av_buffersrc_get_nb_failed_requests(graph->inputs[i]->filter);
3387         if (nb_req > nb_req_max) {
3388             InputStream *ist = graph->inputs[i]->ist;
3389             if (input_acceptable(ist)) {
3390                 nb_req_max = nb_req;
3391                 file_index = ist->file_index;
3392             }
3393         }
3394     }
3395
3396     return file_index;
3397 }
3398
3399 /**
3400  * Select the input file to read from.
3401  *
3402  * @return  >=0 index of the input file to use;
3403  *          -1  if no file is acceptable;
3404  *          -2  to read from filters without reading from a file
3405  */
3406 static int select_input_file(void)
3407 {
3408     int i, ret, nb_active_out = nb_output_streams, ost_index = -1;
3409     int64_t opts_min;
3410     OutputStream *ost;
3411     AVFilterBufferRef *dummy;
3412
3413     for (i = 0; i < nb_output_streams; i++)
3414         nb_active_out -= output_streams[i]->unavailable =
3415             output_streams[i]->is_past_recording_time;
3416     while (nb_active_out) {
3417         opts_min = INT64_MAX;
3418         ost_index = -1;
3419         for (i = 0; i < nb_output_streams; i++) {
3420             OutputStream *ost = output_streams[i];
3421             int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
3422                                         AV_TIME_BASE_Q);
3423             if (!ost->unavailable && opts < opts_min) {
3424                 opts_min  = opts;
3425                 ost_index = i;
3426             }
3427         }
3428         if (ost_index < 0)
3429             return -1;
3430
3431         ost = output_streams[ost_index];
3432         if (ost->source_index >= 0) {
3433             /* ost is directly connected to an input */
3434             InputStream *ist = input_streams[ost->source_index];
3435             if (input_acceptable(ist))
3436                 return ist->file_index;
3437         } else {
3438             /* ost is connected to a complex filtergraph */
3439             av_assert1(ost->filter);
3440             ret = av_buffersink_get_buffer_ref(ost->filter->filter, &dummy,
3441                                                AV_BUFFERSINK_FLAG_PEEK);
3442             if (ret >= 0)
3443                 return -2;
3444             ret = find_graph_input(ost->filter->graph);
3445             if (ret >= 0)
3446                 return ret;
3447         }
3448         ost->unavailable = 1;
3449         nb_active_out--;
3450     }
3451     return -1;
3452 }
3453
3454 static int check_keyboard_interaction(int64_t cur_time)
3455 {
3456     int i, ret, key;
3457     static int64_t last_time;
3458     if (received_nb_signals)
3459         return AVERROR_EXIT;
3460     /* read_key() returns 0 on EOF */
3461     if(cur_time - last_time >= 100000 && !run_as_daemon){
3462         key =  read_key();
3463         last_time = cur_time;
3464     }else
3465         key = -1;
3466     if (key == 'q')
3467         return AVERROR_EXIT;
3468     if (key == '+') av_log_set_level(av_log_get_level()+10);
3469     if (key == '-') av_log_set_level(av_log_get_level()-10);
3470     if (key == 's') qp_hist     ^= 1;
3471     if (key == 'h'){
3472         if (do_hex_dump){
3473             do_hex_dump = do_pkt_dump = 0;
3474         } else if(do_pkt_dump){
3475             do_hex_dump = 1;
3476         } else
3477             do_pkt_dump = 1;
3478         av_log_set_level(AV_LOG_DEBUG);
3479     }
3480     if (key == 'c' || key == 'C'){
3481         char buf[4096], target[64], command[256], arg[256] = {0};
3482         double time;
3483         int k, n = 0;
3484         fprintf(stderr, "\nEnter command: <target> <time> <command>[ <argument>]\n");
3485         i = 0;
3486         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3487             if (k > 0)
3488                 buf[i++] = k;
3489         buf[i] = 0;
3490         if (k > 0 &&
3491             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
3492             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
3493                    target, time, command, arg);
3494             for (i = 0; i < nb_filtergraphs; i++) {
3495                 FilterGraph *fg = filtergraphs[i];
3496                 if (fg->graph) {
3497                     if (time < 0) {
3498                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
3499                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
3500                         fprintf(stderr, "Command reply for stream %d: ret:%d res:%s\n", i, ret, buf);
3501                     } else {
3502                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
3503                     }
3504                 }
3505             }
3506         } else {
3507             av_log(NULL, AV_LOG_ERROR,
3508                    "Parse error, at least 3 arguments were expected, "
3509                    "only %d given in string '%s'\n", n, buf);
3510         }
3511     }
3512     if (key == 'd' || key == 'D'){
3513         int debug=0;
3514         if(key == 'D') {
3515             debug = input_streams[0]->st->codec->debug<<1;
3516             if(!debug) debug = 1;
3517             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
3518                 debug += debug;
3519         }else
3520             if(scanf("%d", &debug)!=1)
3521                 fprintf(stderr,"error parsing debug value\n");
3522         for(i=0;i<nb_input_streams;i++) {
3523             input_streams[i]->st->codec->debug = debug;
3524         }
3525         for(i=0;i<nb_output_streams;i++) {
3526             OutputStream *ost = output_streams[i];
3527             ost->st->codec->debug = debug;
3528         }
3529         if(debug) av_log_set_level(AV_LOG_DEBUG);
3530         fprintf(stderr,"debug=%d\n", debug);
3531     }
3532     if (key == '?'){
3533         fprintf(stderr, "key    function\n"
3534                         "?      show this help\n"
3535                         "+      increase verbosity\n"
3536                         "-      decrease verbosity\n"
3537                         "c      Send command to filtergraph\n"
3538                         "D      cycle through available debug modes\n"
3539                         "h      dump packets/hex press to cycle through the 3 states\n"
3540                         "q      quit\n"
3541                         "s      Show QP histogram\n"
3542         );
3543     }
3544     return 0;
3545 }
3546
3547 #if HAVE_PTHREADS
3548 static void *input_thread(void *arg)
3549 {
3550     InputFile *f = arg;
3551     int ret = 0;
3552
3553     while (!transcoding_finished && ret >= 0) {
3554         AVPacket pkt;
3555         ret = av_read_frame(f->ctx, &pkt);
3556
3557         if (ret == AVERROR(EAGAIN)) {
3558             av_usleep(10000);
3559             ret = 0;
3560             continue;
3561         } else if (ret < 0)
3562             break;
3563
3564         pthread_mutex_lock(&f->fifo_lock);
3565         while (!av_fifo_space(f->fifo))
3566             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
3567
3568         av_dup_packet(&pkt);
3569         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
3570
3571         pthread_mutex_unlock(&f->fifo_lock);
3572     }
3573
3574     f->finished = 1;
3575     return NULL;
3576 }
3577
3578 static void free_input_threads(void)
3579 {
3580     int i;
3581
3582     if (nb_input_files == 1)
3583         return;
3584
3585     transcoding_finished = 1;
3586
3587     for (i = 0; i < nb_input_files; i++) {
3588         InputFile *f = input_files[i];
3589         AVPacket pkt;
3590
3591         if (!f->fifo || f->joined)
3592             continue;
3593
3594         pthread_mutex_lock(&f->fifo_lock);
3595         while (av_fifo_size(f->fifo)) {
3596             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
3597             av_free_packet(&pkt);
3598         }
3599         pthread_cond_signal(&f->fifo_cond);
3600         pthread_mutex_unlock(&f->fifo_lock);
3601
3602         pthread_join(f->thread, NULL);
3603         f->joined = 1;
3604
3605         while (av_fifo_size(f->fifo)) {
3606             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
3607             av_free_packet(&pkt);
3608         }
3609         av_fifo_free(f->fifo);
3610     }
3611 }
3612
3613 static int init_input_threads(void)
3614 {
3615     int i, ret;
3616
3617     if (nb_input_files == 1)
3618         return 0;
3619
3620     for (i = 0; i < nb_input_files; i++) {
3621         InputFile *f = input_files[i];
3622
3623         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
3624             return AVERROR(ENOMEM);
3625
3626         pthread_mutex_init(&f->fifo_lock, NULL);
3627         pthread_cond_init (&f->fifo_cond, NULL);
3628
3629         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
3630             return AVERROR(ret);
3631     }
3632     return 0;
3633 }
3634
3635 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
3636 {
3637     int ret = 0;
3638
3639     pthread_mutex_lock(&f->fifo_lock);
3640
3641     if (av_fifo_size(f->fifo)) {
3642         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
3643         pthread_cond_signal(&f->fifo_cond);
3644     } else {
3645         if (f->finished)
3646             ret = AVERROR_EOF;
3647         else
3648             ret = AVERROR(EAGAIN);
3649     }
3650
3651     pthread_mutex_unlock(&f->fifo_lock);
3652
3653     return ret;
3654 }
3655 #endif
3656
3657 static int get_input_packet(InputFile *f, AVPacket *pkt)
3658 {
3659 #if HAVE_PTHREADS
3660     if (nb_input_files > 1)
3661         return get_input_packet_mt(f, pkt);
3662 #endif
3663     return av_read_frame(f->ctx, pkt);
3664 }
3665
3666 /*
3667  * The following code is the main loop of the file converter
3668  */
3669 static int transcode(void)
3670 {
3671     int ret, i;
3672     AVFormatContext *is, *os;
3673     OutputStream *ost;
3674     InputStream *ist;
3675     int no_packet_count = 0;
3676     int64_t timer_start;
3677
3678     ret = transcode_init();
3679     if (ret < 0)
3680         goto fail;
3681
3682     if (stdin_interaction) {
3683         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
3684     }
3685
3686     timer_start = av_gettime();
3687
3688 #if HAVE_PTHREADS
3689     if ((ret = init_input_threads()) < 0)
3690         goto fail;
3691 #endif
3692
3693     for (; received_sigterm == 0;) {
3694         int file_index, ist_index;
3695         AVPacket pkt;
3696         int64_t cur_time= av_gettime();
3697
3698         /* if 'q' pressed, exits */
3699         if (stdin_interaction)
3700             if (check_keyboard_interaction(cur_time) < 0)
3701                 break;
3702
3703         /* check if there's any stream where output is still needed */
3704         if (!need_output()) {
3705             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
3706             break;
3707         }
3708
3709         /* select the stream that we must read now */
3710         file_index = select_input_file();
3711         /* if none, if is finished */
3712         if (file_index == -2) {
3713             poll_filters() ;
3714             continue;
3715         }
3716         if (file_index < 0) {
3717             if (no_packet_count) {
3718                 no_packet_count = 0;
3719                 for (i = 0; i < nb_input_files; i++)
3720                     input_files[i]->unavailable = 0;
3721                 av_usleep(10000);
3722                 continue;
3723             }
3724             av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
3725             break;
3726         }
3727
3728         is  = input_files[file_index]->ctx;
3729         ret = get_input_packet(input_files[file_index], &pkt);
3730
3731         if (ret == AVERROR(EAGAIN)) {
3732             input_files[file_index]->unavailable = 1;
3733             no_packet_count++;
3734             continue;
3735         }
3736         if (ret < 0) {
3737             if (ret != AVERROR_EOF) {
3738                 print_error(is->filename, ret);
3739                 if (exit_on_error)
3740                     exit_program(1);
3741             }
3742             input_files[file_index]->eof_reached = 1;
3743
3744             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
3745                 ist = input_streams[input_files[file_index]->ist_index + i];
3746                 if (ist->decoding_needed)
3747                     output_packet(ist, NULL);
3748                 poll_filters();
3749             }
3750
3751             if (opt_shortest)
3752                 break;
3753             else
3754                 continue;
3755         }
3756
3757         no_packet_count = 0;
3758         for (i = 0; i < nb_input_files; i++)
3759             input_files[i]->unavailable = 0;
3760
3761         if (do_pkt_dump) {
3762             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3763                              is->streams[pkt.stream_index]);
3764         }
3765         /* the following test is needed in case new streams appear
3766            dynamically in stream : we ignore them */
3767         if (pkt.stream_index >= input_files[file_index]->nb_streams) {
3768             report_new_stream(file_index, &pkt);
3769             goto discard_packet;
3770         }
3771         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
3772         ist = input_streams[ist_index];
3773         if (ist->discard)
3774             goto discard_packet;
3775
3776         if(!ist->wrap_correction_done && input_files[file_index]->ctx->start_time != AV_NOPTS_VALUE && ist->st->pts_wrap_bits < 64){
3777             uint64_t stime = av_rescale_q(input_files[file_index]->ctx->start_time, AV_TIME_BASE_Q, ist->st->time_base);
3778             uint64_t stime2= stime + (1LL<<ist->st->pts_wrap_bits);
3779             ist->wrap_correction_done = 1;
3780             if(pkt.dts != AV_NOPTS_VALUE && pkt.dts > stime && pkt.dts - stime > stime2 - pkt.dts) {
3781                 pkt.dts -= 1LL<<ist->st->pts_wrap_bits;
3782                 ist->wrap_correction_done = 0;
3783             }
3784             if(pkt.pts != AV_NOPTS_VALUE && pkt.pts > stime && pkt.pts - stime > stime2 - pkt.pts) {
3785                 pkt.pts -= 1LL<<ist->st->pts_wrap_bits;
3786                 ist->wrap_correction_done = 0;
3787             }
3788         }
3789
3790         if (pkt.dts != AV_NOPTS_VALUE)
3791             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3792         if (pkt.pts != AV_NOPTS_VALUE)
3793             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3794
3795         if (pkt.pts != AV_NOPTS_VALUE)
3796             pkt.pts *= ist->ts_scale;
3797         if (pkt.dts != AV_NOPTS_VALUE)
3798             pkt.dts *= ist->ts_scale;
3799
3800         if (debug_ts) {
3801             av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
3802                     "next_dts:%s next_dts_time:%s next_pts:%s next_pts_time:%s  pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%"PRId64"\n",
3803                     ist_index, av_get_media_type_string(ist->st->codec->codec_type),
3804                     av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &AV_TIME_BASE_Q),
3805                     av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &AV_TIME_BASE_Q),
3806                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3807                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3808                     input_files[ist->file_index]->ts_offset);
3809         }
3810
3811         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE && !copy_ts) {
3812             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3813             int64_t delta   = pkt_dts - ist->next_dts;
3814             if (is->iformat->flags & AVFMT_TS_DISCONT) {
3815             if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3816                 (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3817                  ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3818                 pkt_dts+1<ist->pts){
3819                 input_files[ist->file_index]->ts_offset -= delta;
3820                 av_log(NULL, AV_LOG_DEBUG,
3821                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3822                        delta, input_files[ist->file_index]->ts_offset);
3823                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3824                 if (pkt.pts != AV_NOPTS_VALUE)
3825                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3826             }
3827             } else {
3828                 if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3829                     (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3830                      pkt_dts+1<ist->pts){
3831                     av_log(NULL, AV_LOG_WARNING, "DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n", pkt.dts, ist->next_dts, pkt.stream_index);
3832                     pkt.dts = AV_NOPTS_VALUE;
3833                 }
3834                 if (pkt.pts != AV_NOPTS_VALUE){
3835                     int64_t pkt_pts = av_rescale_q(pkt.pts, ist->st->time_base, AV_TIME_BASE_Q);
3836                     delta   = pkt_pts - ist->next_dts;
3837                     if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3838                         (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3839                         pkt_pts+1<ist->pts) {
3840                         av_log(NULL, AV_LOG_WARNING, "PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n", pkt.pts, ist->next_dts, pkt.stream_index);
3841                         pkt.pts = AV_NOPTS_VALUE;
3842                     }
3843                 }
3844             }
3845         }
3846
3847         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
3848         if ((ret = output_packet(ist, &pkt)) < 0 ||
3849             ((ret = poll_filters()) < 0 && ret != AVERROR_EOF)) {
3850             char buf[128];
3851             av_strerror(ret, buf, sizeof(buf));
3852             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d: %s\n",
3853                    ist->file_index, ist->st->index, buf);
3854             if (exit_on_error)
3855                 exit_program(1);
3856             av_free_packet(&pkt);
3857             continue;
3858         }
3859
3860     discard_packet:
3861         av_free_packet(&pkt);
3862
3863         /* dump report by using the output first video and audio streams */
3864         print_report(0, timer_start, cur_time);
3865     }
3866 #if HAVE_PTHREADS
3867     free_input_threads();
3868 #endif
3869
3870     /* at the end of stream, we must flush the decoder buffers */
3871     for (i = 0; i < nb_input_streams; i++) {
3872         ist = input_streams[i];
3873         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3874             output_packet(ist, NULL);
3875         }
3876     }
3877     poll_filters();
3878     flush_encoders();
3879
3880     term_exit();
3881
3882     /* write the trailer if needed and close file */
3883     for (i = 0; i < nb_output_files; i++) {
3884         os = output_files[i]->ctx;
3885         av_write_trailer(os);
3886     }
3887
3888     /* dump report by using the first video and audio streams */
3889     print_report(1, timer_start, av_gettime());
3890
3891     /* close each encoder */
3892     for (i = 0; i < nb_output_streams; i++) {
3893         ost = output_streams[i];
3894         if (ost->encoding_needed) {
3895             av_freep(&ost->st->codec->stats_in);
3896             avcodec_close(ost->st->codec);
3897         }
3898     }
3899
3900     /* close each decoder */
3901     for (i = 0; i < nb_input_streams; i++) {
3902         ist = input_streams[i];
3903         if (ist->decoding_needed) {
3904             avcodec_close(ist->st->codec);
3905         }
3906     }
3907
3908     /* finished ! */
3909     ret = 0;
3910
3911  fail:
3912 #if HAVE_PTHREADS
3913     free_input_threads();
3914 #endif
3915
3916     if (output_streams) {
3917         for (i = 0; i < nb_output_streams; i++) {
3918             ost = output_streams[i];
3919             if (ost) {
3920                 if (ost->stream_copy)
3921                     av_freep(&ost->st->codec->extradata);
3922                 if (ost->logfile) {
3923                     fclose(ost->logfile);
3924                     ost->logfile = NULL;
3925                 }
3926                 av_freep(&ost->st->codec->subtitle_header);
3927                 av_free(ost->forced_kf_pts);
3928                 av_dict_free(&ost->opts);
3929             }
3930         }
3931     }
3932     return ret;
3933 }
3934
3935 static int opt_frame_crop(const char *opt, const char *arg)
3936 {
3937     av_log(NULL, AV_LOG_FATAL, "Option '%s' has been removed, use the crop filter instead\n", opt);
3938     return AVERROR(EINVAL);
3939 }
3940
3941 static int opt_pad(const char *opt, const char *arg)
3942 {
3943     av_log(NULL, AV_LOG_FATAL, "Option '%s' has been removed, use the pad filter instead\n", opt);
3944     return -1;
3945 }
3946
3947 static int opt_video_channel(const char *opt, const char *arg)
3948 {
3949     av_log(NULL, AV_LOG_WARNING, "This option is deprecated, use -channel.\n");
3950     return opt_default("channel", arg);
3951 }
3952
3953 static int opt_video_standard(const char *opt, const char *arg)
3954 {
3955     av_log(NULL, AV_LOG_WARNING, "This option is deprecated, use -standard.\n");
3956     return opt_default("standard", arg);
3957 }
3958
3959 static int opt_audio_codec(OptionsContext *o, const char *opt, const char *arg)
3960 {
3961     audio_codec_name = arg;
3962     return parse_option(o, "codec:a", arg, options);
3963 }
3964
3965 static int opt_video_codec(OptionsContext *o, const char *opt, const char *arg)
3966 {
3967     video_codec_name = arg;
3968     return parse_option(o, "codec:v", arg, options);
3969 }
3970
3971 static int opt_subtitle_codec(OptionsContext *o, const char *opt, const char *arg)
3972 {
3973     subtitle_codec_name = arg;
3974     return parse_option(o, "codec:s", arg, options);
3975 }
3976
3977 static int opt_data_codec(OptionsContext *o, const char *opt, const char *arg)
3978 {
3979     return parse_option(o, "codec:d", arg, options);
3980 }
3981
3982 static int opt_map(OptionsContext *o, const char *opt, const char *arg)
3983 {
3984     StreamMap *m = NULL;
3985     int i, negative = 0, file_idx;
3986     int sync_file_idx = -1, sync_stream_idx = 0;
3987     char *p, *sync;
3988     char *map;
3989
3990     if (*arg == '-') {
3991         negative = 1;
3992         arg++;
3993     }
3994     map = av_strdup(arg);
3995
3996     /* parse sync stream first, just pick first matching stream */
3997     if (sync = strchr(map, ',')) {
3998         *sync = 0;
3999         sync_file_idx = strtol(sync + 1, &sync, 0);
4000         if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
4001             av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
4002             exit_program(1);
4003         }
4004         if (*sync)
4005             sync++;
4006         for (i = 0; i < input_files[sync_file_idx]->nb_streams; i++)
4007             if (check_stream_specifier(input_files[sync_file_idx]->ctx,
4008                                        input_files[sync_file_idx]->ctx->streams[i], sync) == 1) {
4009                 sync_stream_idx = i;
4010                 break;
4011             }
4012         if (i == input_files[sync_file_idx]->nb_streams) {
4013             av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
4014                                        "match any streams.\n", arg);
4015             exit_program(1);
4016         }
4017     }
4018
4019
4020     if (map[0] == '[') {
4021         /* this mapping refers to lavfi output */
4022         const char *c = map + 1;
4023         o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
4024                                     &o->nb_stream_maps, o->nb_stream_maps + 1);
4025         m = &o->stream_maps[o->nb_stream_maps - 1];
4026         m->linklabel = av_get_token(&c, "]");
4027         if (!m->linklabel) {
4028             av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
4029             exit_program(1);
4030         }
4031     } else {
4032         file_idx = strtol(map, &p, 0);
4033         if (file_idx >= nb_input_files || file_idx < 0) {
4034             av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
4035             exit_program(1);
4036         }
4037         if (negative)
4038             /* disable some already defined maps */
4039             for (i = 0; i < o->nb_stream_maps; i++) {
4040                 m = &o->stream_maps[i];
4041                 if (file_idx == m->file_index &&
4042                     check_stream_specifier(input_files[m->file_index]->ctx,
4043                                            input_files[m->file_index]->ctx->streams[m->stream_index],
4044                                            *p == ':' ? p + 1 : p) > 0)
4045                     m->disabled = 1;
4046             }
4047         else
4048             for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
4049                 if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
4050                             *p == ':' ? p + 1 : p) <= 0)
4051                     continue;
4052                 o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
4053                                             &o->nb_stream_maps, o->nb_stream_maps + 1);
4054                 m = &o->stream_maps[o->nb_stream_maps - 1];
4055
4056                 m->file_index   = file_idx;
4057                 m->stream_index = i;
4058
4059                 if (sync_file_idx >= 0) {
4060                     m->sync_file_index   = sync_file_idx;
4061                     m->sync_stream_index = sync_stream_idx;
4062                 } else {
4063                     m->sync_file_index   = file_idx;
4064                     m->sync_stream_index = i;
4065                 }
4066             }
4067     }
4068
4069     if (!m) {
4070         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
4071         exit_program(1);
4072     }
4073
4074     av_freep(&map);
4075     return 0;
4076 }
4077
4078 static int opt_attach(OptionsContext *o, const char *opt, const char *arg)
4079 {
4080     o->attachments = grow_array(o->attachments, sizeof(*o->attachments),
4081                                 &o->nb_attachments, o->nb_attachments + 1);
4082     o->attachments[o->nb_attachments - 1] = arg;
4083     return 0;
4084 }
4085
4086 static int opt_map_channel(OptionsContext *o, const char *opt, const char *arg)
4087 {
4088     int n;
4089     AVStream *st;
4090     AudioChannelMap *m;
4091
4092     o->audio_channel_maps =
4093         grow_array(o->audio_channel_maps, sizeof(*o->audio_channel_maps),
4094                    &o->nb_audio_channel_maps, o->nb_audio_channel_maps + 1);
4095     m = &o->audio_channel_maps[o->nb_audio_channel_maps - 1];
4096
4097     /* muted channel syntax */
4098     n = sscanf(arg, "%d:%d.%d", &m->channel_idx, &m->ofile_idx, &m->ostream_idx);
4099     if ((n == 1 || n == 3) && m->channel_idx == -1) {
4100         m->file_idx = m->stream_idx = -1;
4101         if (n == 1)
4102             m->ofile_idx = m->ostream_idx = -1;
4103         return 0;
4104     }
4105
4106     /* normal syntax */
4107     n = sscanf(arg, "%d.%d.%d:%d.%d",
4108                &m->file_idx,  &m->stream_idx, &m->channel_idx,
4109                &m->ofile_idx, &m->ostream_idx);
4110
4111     if (n != 3 && n != 5) {
4112         av_log(NULL, AV_LOG_FATAL, "Syntax error, mapchan usage: "
4113                "[file.stream.channel|-1][:syncfile:syncstream]\n");
4114         exit_program(1);
4115     }
4116
4117     if (n != 5) // only file.stream.channel specified
4118         m->ofile_idx = m->ostream_idx = -1;
4119
4120     /* check input */
4121     if (m->file_idx < 0 || m->file_idx >= nb_input_files) {
4122         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid input file index: %d\n",
4123                m->file_idx);
4124         exit_program(1);
4125     }
4126     if (m->stream_idx < 0 ||
4127         m->stream_idx >= input_files[m->file_idx]->nb_streams) {
4128         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid input file stream index #%d.%d\n",
4129                m->file_idx, m->stream_idx);
4130         exit_program(1);
4131     }
4132     st = input_files[m->file_idx]->ctx->streams[m->stream_idx];
4133     if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
4134         av_log(NULL, AV_LOG_FATAL, "mapchan: stream #%d.%d is not an audio stream.\n",
4135                m->file_idx, m->stream_idx);
4136         exit_program(1);
4137     }
4138     if (m->channel_idx < 0 || m->channel_idx >= st->codec->channels) {
4139         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid audio channel #%d.%d.%d\n",
4140                m->file_idx, m->stream_idx, m->channel_idx);
4141         exit_program(1);
4142     }
4143     return 0;
4144 }
4145
4146 /**
4147  * Parse a metadata specifier in arg.
4148  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
4149  * @param index for type c/p, chapter/program index is written here
4150  * @param stream_spec for type s, the stream specifier is written here
4151  */
4152 static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
4153 {
4154     if (*arg) {
4155         *type = *arg;
4156         switch (*arg) {
4157         case 'g':
4158             break;
4159         case 's':
4160             if (*(++arg) && *arg != ':') {
4161                 av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
4162                 exit_program(1);
4163             }
4164             *stream_spec = *arg == ':' ? arg + 1 : "";
4165             break;
4166         case 'c':
4167         case 'p':
4168             if (*(++arg) == ':')
4169                 *index = strtol(++arg, NULL, 0);
4170             break;
4171         default:
4172             av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
4173             exit_program(1);
4174         }
4175     } else
4176         *type = 'g';
4177 }
4178
4179 static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
4180 {
4181     AVDictionary **meta_in = NULL;
4182     AVDictionary **meta_out = NULL;
4183     int i, ret = 0;
4184     char type_in, type_out;
4185     const char *istream_spec = NULL, *ostream_spec = NULL;
4186     int idx_in = 0, idx_out = 0;
4187
4188     parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
4189     parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
4190
4191     if (!ic) {
4192         if (type_out == 'g' || !*outspec)
4193             o->metadata_global_manual = 1;
4194         if (type_out == 's' || !*outspec)
4195             o->metadata_streams_manual = 1;
4196         if (type_out == 'c' || !*outspec)
4197             o->metadata_chapters_manual = 1;
4198         return 0;
4199     }
4200
4201     if (type_in == 'g' || type_out == 'g')
4202         o->metadata_global_manual = 1;
4203     if (type_in == 's' || type_out == 's')
4204         o->metadata_streams_manual = 1;
4205     if (type_in == 'c' || type_out == 'c')
4206         o->metadata_chapters_manual = 1;
4207
4208 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
4209     if ((index) < 0 || (index) >= (nb_elems)) {\
4210         av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
4211                 (desc), (index));\
4212         exit_program(1);\
4213     }
4214
4215 #define SET_DICT(type, meta, context, index)\
4216         switch (type) {\
4217         case 'g':\
4218             meta = &context->metadata;\
4219             break;\
4220         case 'c':\
4221             METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
4222             meta = &context->chapters[index]->metadata;\
4223             break;\
4224         case 'p':\
4225             METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
4226             meta = &context->programs[index]->metadata;\
4227             break;\
4228         default: av_assert0(0);\
4229         }\
4230
4231     SET_DICT(type_in, meta_in, ic, idx_in);
4232     SET_DICT(type_out, meta_out, oc, idx_out);
4233
4234     /* for input streams choose first matching stream */
4235     if (type_in == 's') {
4236         for (i = 0; i < ic->nb_streams; i++) {
4237             if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
4238                 meta_in = &ic->streams[i]->metadata;
4239                 break;
4240             } else if (ret < 0)
4241                 exit_program(1);
4242         }
4243         if (!meta_in) {
4244             av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
4245             exit_program(1);
4246         }
4247     }
4248
4249     if (type_out == 's') {
4250         for (i = 0; i < oc->nb_streams; i++) {
4251             if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
4252                 meta_out = &oc->streams[i]->metadata;
4253                 av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
4254             } else if (ret < 0)
4255                 exit_program(1);