ffmpeg: dont copy creation_time as the destination file is not created at that time
[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 using_stdin = 0;
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
179 #if HAVE_PTHREADS
180 /* signal to input threads that they should exit; set by the main thread */
181 static int transcoding_finished;
182 #endif
183
184 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
185
186 typedef struct InputFilter {
187     AVFilterContext    *filter;
188     struct InputStream *ist;
189     struct FilterGraph *graph;
190     uint8_t            *name;
191 } InputFilter;
192
193 typedef struct OutputFilter {
194     AVFilterContext     *filter;
195     struct OutputStream *ost;
196     struct FilterGraph  *graph;
197     uint8_t             *name;
198
199     /* temporary storage until stream maps are processed */
200     AVFilterInOut       *out_tmp;
201 } OutputFilter;
202
203 typedef struct FilterGraph {
204     int            index;
205     const char    *graph_desc;
206
207     AVFilterGraph *graph;
208
209     InputFilter   **inputs;
210     int          nb_inputs;
211     OutputFilter **outputs;
212     int         nb_outputs;
213 } FilterGraph;
214
215 typedef struct InputStream {
216     int file_index;
217     AVStream *st;
218     int discard;             /* true if stream data should be discarded */
219     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
220     AVCodec *dec;
221     AVFrame *decoded_frame;
222
223     int64_t       start;     /* time when read started */
224     /* predicted dts of the next packet read for this stream or (when there are
225      * several frames in a packet) of the next frame in current packet */
226     int64_t       next_dts;
227     /* dts of the last packet read for this stream */
228     int64_t       dts;
229
230     int64_t       next_pts;  /* synthetic pts for the next decode frame */
231     int64_t       pts;       /* current pts of the decoded frame */
232     double ts_scale;
233     int is_start;            /* is 1 at the start and after a discontinuity */
234     int saw_first_ts;
235     int showed_multi_packet_warning;
236     AVDictionary *opts;
237     AVRational framerate;               /* framerate forced with -r */
238     int top_field_first;
239
240     int resample_height;
241     int resample_width;
242     int resample_pix_fmt;
243
244     int      resample_sample_fmt;
245     int      resample_sample_rate;
246     int      resample_channels;
247     uint64_t resample_channel_layout;
248
249     /* a pool of free buffers for decoded data */
250     FrameBuffer *buffer_pool;
251     int dr1;
252
253     /* decoded data from this stream goes into all those filters
254      * currently video and audio only */
255     InputFilter **filters;
256     int        nb_filters;
257 } InputStream;
258
259 typedef struct InputFile {
260     AVFormatContext *ctx;
261     int eof_reached;      /* true if eof reached */
262     int ist_index;        /* index of first stream in input_streams */
263     int64_t ts_offset;
264     int nb_streams;       /* number of stream that ffmpeg is aware of; may be different
265                              from ctx.nb_streams if new streams appear during av_read_frame() */
266     int rate_emu;
267
268 #if HAVE_PTHREADS
269     pthread_t thread;           /* thread reading from this file */
270     int finished;               /* the thread has exited */
271     int joined;                 /* the thread has been joined */
272     pthread_mutex_t fifo_lock;  /* lock for access to fifo */
273     pthread_cond_t  fifo_cond;  /* the main thread will signal on this cond after reading from fifo */
274     AVFifoBuffer *fifo;         /* demuxed packets are stored here; freed by the main thread */
275 #endif
276 } InputFile;
277
278 typedef struct OutputStream {
279     int file_index;          /* file index */
280     int index;               /* stream index in the output file */
281     int source_index;        /* InputStream index */
282     AVStream *st;            /* stream in the output file */
283     int encoding_needed;     /* true if encoding needed for this stream */
284     int frame_number;
285     /* input pts and corresponding output pts
286        for A/V sync */
287     struct InputStream *sync_ist; /* input stream to sync against */
288     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
289     /* pts of the first frame encoded for this stream, used for limiting
290      * recording time */
291     int64_t first_pts;
292     AVBitStreamFilterContext *bitstream_filters;
293     AVCodec *enc;
294     int64_t max_frames;
295     AVFrame *filtered_frame;
296
297     /* video only */
298     AVRational frame_rate;
299     int force_fps;
300     int top_field_first;
301
302     float frame_aspect_ratio;
303     float last_quality;
304
305     /* forced key frames */
306     int64_t *forced_kf_pts;
307     int forced_kf_count;
308     int forced_kf_index;
309     char *forced_keyframes;
310
311     /* audio only */
312     int audio_channels_map[SWR_CH_MAX];  /* list of the channels id to pick from the source stream */
313     int audio_channels_mapped;           /* number of channels in audio_channels_map */
314
315     FILE *logfile;
316
317     OutputFilter *filter;
318     char *avfilter;
319
320     int64_t sws_flags;
321     int64_t swr_dither_method;
322     double swr_dither_scale;
323     AVDictionary *opts;
324     int is_past_recording_time;
325     int stream_copy;
326     const char *attachment_filename;
327     int copy_initial_nonkeyframes;
328
329     int keep_pix_fmt;
330 } OutputStream;
331
332
333 #if HAVE_TERMIOS_H
334
335 /* init terminal so that we can grab keys */
336 static struct termios oldtty;
337 static int restore_tty;
338 #endif
339
340 typedef struct OutputFile {
341     AVFormatContext *ctx;
342     AVDictionary *opts;
343     int ost_index;       /* index of the first stream in output_streams */
344     int64_t recording_time; /* desired length of the resulting file in microseconds */
345     int64_t start_time;     /* start time in microseconds */
346     uint64_t limit_filesize; /* filesize limit expressed in bytes */
347 } OutputFile;
348
349 static InputStream **input_streams = NULL;
350 static int        nb_input_streams = 0;
351 static InputFile   **input_files   = NULL;
352 static int        nb_input_files   = 0;
353
354 static OutputStream **output_streams = NULL;
355 static int         nb_output_streams = 0;
356 static OutputFile   **output_files   = NULL;
357 static int         nb_output_files   = 0;
358
359 static FilterGraph **filtergraphs;
360 int               nb_filtergraphs;
361
362 typedef struct OptionsContext {
363     /* input/output options */
364     int64_t start_time;
365     const char *format;
366
367     SpecifierOpt *codec_names;
368     int        nb_codec_names;
369     SpecifierOpt *audio_channels;
370     int        nb_audio_channels;
371     SpecifierOpt *audio_sample_rate;
372     int        nb_audio_sample_rate;
373     SpecifierOpt *frame_rates;
374     int        nb_frame_rates;
375     SpecifierOpt *frame_sizes;
376     int        nb_frame_sizes;
377     SpecifierOpt *frame_pix_fmts;
378     int        nb_frame_pix_fmts;
379
380     /* input options */
381     int64_t input_ts_offset;
382     int rate_emu;
383
384     SpecifierOpt *ts_scale;
385     int        nb_ts_scale;
386     SpecifierOpt *dump_attachment;
387     int        nb_dump_attachment;
388
389     /* output options */
390     StreamMap *stream_maps;
391     int     nb_stream_maps;
392     AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
393     int           nb_audio_channel_maps; /* number of (valid) -map_channel settings */
394     int metadata_global_manual;
395     int metadata_streams_manual;
396     int metadata_chapters_manual;
397     const char **attachments;
398     int       nb_attachments;
399
400     int chapters_input_file;
401
402     int64_t recording_time;
403     uint64_t limit_filesize;
404     float mux_preload;
405     float mux_max_delay;
406
407     int video_disable;
408     int audio_disable;
409     int subtitle_disable;
410     int data_disable;
411
412     /* indexed by output file stream index */
413     int   *streamid_map;
414     int nb_streamid_map;
415
416     SpecifierOpt *metadata;
417     int        nb_metadata;
418     SpecifierOpt *max_frames;
419     int        nb_max_frames;
420     SpecifierOpt *bitstream_filters;
421     int        nb_bitstream_filters;
422     SpecifierOpt *codec_tags;
423     int        nb_codec_tags;
424     SpecifierOpt *sample_fmts;
425     int        nb_sample_fmts;
426     SpecifierOpt *qscale;
427     int        nb_qscale;
428     SpecifierOpt *forced_key_frames;
429     int        nb_forced_key_frames;
430     SpecifierOpt *force_fps;
431     int        nb_force_fps;
432     SpecifierOpt *frame_aspect_ratios;
433     int        nb_frame_aspect_ratios;
434     SpecifierOpt *rc_overrides;
435     int        nb_rc_overrides;
436     SpecifierOpt *intra_matrices;
437     int        nb_intra_matrices;
438     SpecifierOpt *inter_matrices;
439     int        nb_inter_matrices;
440     SpecifierOpt *top_field_first;
441     int        nb_top_field_first;
442     SpecifierOpt *metadata_map;
443     int        nb_metadata_map;
444     SpecifierOpt *presets;
445     int        nb_presets;
446     SpecifierOpt *copy_initial_nonkeyframes;
447     int        nb_copy_initial_nonkeyframes;
448     SpecifierOpt *filters;
449     int        nb_filters;
450 } OptionsContext;
451
452 static void do_video_stats(AVFormatContext *os, OutputStream *ost, int frame_size);
453
454 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
455 {\
456     int i, ret;\
457     for (i = 0; i < o->nb_ ## name; i++) {\
458         char *spec = o->name[i].specifier;\
459         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
460             outvar = o->name[i].u.type;\
461         else if (ret < 0)\
462             exit_program(1);\
463     }\
464 }
465
466 static int64_t getutime(void)
467 {
468 #if HAVE_GETRUSAGE
469     struct rusage rusage;
470
471     getrusage(RUSAGE_SELF, &rusage);
472     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
473 #elif HAVE_GETPROCESSTIMES
474     HANDLE proc;
475     FILETIME c, e, k, u;
476     proc = GetCurrentProcess();
477     GetProcessTimes(proc, &c, &e, &k, &u);
478     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
479 #else
480     return av_gettime();
481 #endif
482 }
483
484 static void update_benchmark(const char *fmt, ...)
485 {
486     if (do_benchmark_all) {
487         int64_t t = getutime();
488         va_list va;
489         char buf[1024];
490
491         if (fmt) {
492             va_start(va, fmt);
493             vsnprintf(buf, sizeof(buf), fmt, va);
494             va_end(va);
495             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
496         }
497         current_time = t;
498     }
499 }
500
501 static void reset_options(OptionsContext *o, int is_input)
502 {
503     const OptionDef *po = options;
504     OptionsContext bak= *o;
505     int i;
506
507     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
508     while (po->name) {
509         void *dst = (uint8_t*)o + po->u.off;
510
511         if (po->flags & OPT_SPEC) {
512             SpecifierOpt **so = dst;
513             int i, *count = (int*)(so + 1);
514             for (i = 0; i < *count; i++) {
515                 av_freep(&(*so)[i].specifier);
516                 if (po->flags & OPT_STRING)
517                     av_freep(&(*so)[i].u.str);
518             }
519             av_freep(so);
520             *count = 0;
521         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
522             av_freep(dst);
523         po++;
524     }
525
526     for (i = 0; i < o->nb_stream_maps; i++)
527         av_freep(&o->stream_maps[i].linklabel);
528     av_freep(&o->stream_maps);
529     av_freep(&o->audio_channel_maps);
530     av_freep(&o->streamid_map);
531
532     memset(o, 0, sizeof(*o));
533
534     if(is_input) o->recording_time = bak.recording_time;
535     else         o->recording_time = INT64_MAX;
536     o->mux_max_delay  = 0.7;
537     o->limit_filesize = UINT64_MAX;
538     o->chapters_input_file = INT_MAX;
539
540     uninit_opts();
541     init_opts();
542 }
543
544 static enum PixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum PixelFormat target)
545 {
546     if (codec && codec->pix_fmts) {
547         const enum PixelFormat *p = codec->pix_fmts;
548         int has_alpha= av_pix_fmt_descriptors[target].nb_components % 2 == 0;
549         enum PixelFormat best= PIX_FMT_NONE;
550         if (st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
551             if (st->codec->codec_id == CODEC_ID_MJPEG) {
552                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
553             } else if (st->codec->codec_id == CODEC_ID_LJPEG) {
554                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
555                                                  PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
556             }
557         }
558         for (; *p != PIX_FMT_NONE; p++) {
559             best= avcodec_find_best_pix_fmt2(best, *p, target, has_alpha, NULL);
560             if (*p == target)
561                 break;
562         }
563         if (*p == PIX_FMT_NONE) {
564             if (target != PIX_FMT_NONE)
565                 av_log(NULL, AV_LOG_WARNING,
566                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
567                        av_pix_fmt_descriptors[target].name,
568                        codec->name,
569                        av_pix_fmt_descriptors[best].name);
570             return best;
571         }
572     }
573     return target;
574 }
575
576 static char *choose_pix_fmts(OutputStream *ost)
577 {
578      if (ost->keep_pix_fmt) {
579         if (ost->filter)
580             avfilter_graph_set_auto_convert(ost->filter->graph->graph,
581                                             AVFILTER_AUTO_CONVERT_NONE);
582         if (ost->st->codec->pix_fmt == PIX_FMT_NONE)
583             return NULL;
584         return av_strdup(av_get_pix_fmt_name(ost->st->codec->pix_fmt));
585     }
586     if (ost->st->codec->pix_fmt != PIX_FMT_NONE) {
587         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc, ost->st->codec->pix_fmt)));
588     } else if (ost->enc && ost->enc->pix_fmts) {
589         const enum PixelFormat *p;
590         AVIOContext *s = NULL;
591         uint8_t *ret;
592         int len;
593
594         if (avio_open_dyn_buf(&s) < 0)
595             exit_program(1);
596
597         p = ost->enc->pix_fmts;
598         if (ost->st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
599             if (ost->st->codec->codec_id == CODEC_ID_MJPEG) {
600                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
601             } else if (ost->st->codec->codec_id == CODEC_ID_LJPEG) {
602                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
603                                                     PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
604             }
605         }
606
607         for (; *p != PIX_FMT_NONE; p++) {
608             const char *name = av_get_pix_fmt_name(*p);
609             avio_printf(s, "%s:", name);
610         }
611         len = avio_close_dyn_buf(s, &ret);
612         ret[len - 1] = 0;
613         return ret;
614     } else
615         return NULL;
616 }
617
618 /**
619  * Define a function for building a string containing a list of
620  * allowed formats,
621  */
622 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator) \
623 static char *choose_ ## var ## s(OutputStream *ost)                             \
624 {                                                                               \
625     if (ost->st->codec->var != none) {                                          \
626         get_name(ost->st->codec->var);                                          \
627         return av_strdup(name);                                                 \
628     } else if (ost->enc->supported_list) {                                      \
629         const type *p;                                                          \
630         AVIOContext *s = NULL;                                                  \
631         uint8_t *ret;                                                           \
632         int len;                                                                \
633                                                                                 \
634         if (avio_open_dyn_buf(&s) < 0)                                          \
635             exit_program(1);                                                    \
636                                                                                 \
637         for (p = ost->enc->supported_list; *p != none; p++) {                   \
638             get_name(*p);                                                       \
639             avio_printf(s, "%s" separator, name);                               \
640         }                                                                       \
641         len = avio_close_dyn_buf(s, &ret);                                      \
642         ret[len - 1] = 0;                                                       \
643         return ret;                                                             \
644     } else                                                                      \
645         return NULL;                                                            \
646 }
647
648 #define GET_PIX_FMT_NAME(pix_fmt)\
649     const char *name = av_get_pix_fmt_name(pix_fmt);
650
651 // DEF_CHOOSE_FORMAT(enum PixelFormat, pix_fmt, pix_fmts, PIX_FMT_NONE,
652 //                   GET_PIX_FMT_NAME, ":")
653
654 #define GET_SAMPLE_FMT_NAME(sample_fmt)\
655     const char *name = av_get_sample_fmt_name(sample_fmt)
656
657 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
658                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME, ",")
659
660 #define GET_SAMPLE_RATE_NAME(rate)\
661     char name[16];\
662     snprintf(name, sizeof(name), "%d", rate);
663
664 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
665                   GET_SAMPLE_RATE_NAME, ",")
666
667 #define GET_CH_LAYOUT_NAME(ch_layout)\
668     char name[16];\
669     snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
670
671 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
672                   GET_CH_LAYOUT_NAME, ",")
673
674 static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
675 {
676     FilterGraph *fg = av_mallocz(sizeof(*fg));
677
678     if (!fg)
679         exit_program(1);
680     fg->index = nb_filtergraphs;
681
682     fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
683                              fg->nb_outputs + 1);
684     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
685         exit_program(1);
686     fg->outputs[0]->ost   = ost;
687     fg->outputs[0]->graph = fg;
688
689     ost->filter = fg->outputs[0];
690
691     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
692                             fg->nb_inputs + 1);
693     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
694         exit_program(1);
695     fg->inputs[0]->ist   = ist;
696     fg->inputs[0]->graph = fg;
697
698     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
699                               &ist->nb_filters, ist->nb_filters + 1);
700     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
701
702     filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
703                               &nb_filtergraphs, nb_filtergraphs + 1);
704     filtergraphs[nb_filtergraphs - 1] = fg;
705
706     return fg;
707 }
708
709 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
710 {
711     InputStream *ist = NULL;
712     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
713     int i;
714
715     // TODO: support other filter types
716     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
717         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
718                "currently.\n");
719         exit_program(1);
720     }
721
722     if (in->name) {
723         AVFormatContext *s;
724         AVStream       *st = NULL;
725         char *p;
726         int file_idx = strtol(in->name, &p, 0);
727
728         if (file_idx < 0 || file_idx >= nb_input_files) {
729             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
730                    file_idx, fg->graph_desc);
731             exit_program(1);
732         }
733         s = input_files[file_idx]->ctx;
734
735         for (i = 0; i < s->nb_streams; i++) {
736             if (s->streams[i]->codec->codec_type != type)
737                 continue;
738             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
739                 st = s->streams[i];
740                 break;
741             }
742         }
743         if (!st) {
744             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
745                    "matches no streams.\n", p, fg->graph_desc);
746             exit_program(1);
747         }
748         ist = input_streams[input_files[file_idx]->ist_index + st->index];
749     } else {
750         /* find the first unused stream of corresponding type */
751         for (i = 0; i < nb_input_streams; i++) {
752             ist = input_streams[i];
753             if (ist->st->codec->codec_type == type && ist->discard)
754                 break;
755         }
756         if (i == nb_input_streams) {
757             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
758                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
759                    in->filter_ctx->name);
760             exit_program(1);
761         }
762     }
763     av_assert0(ist);
764
765     ist->discard         = 0;
766     ist->decoding_needed = 1;
767     ist->st->discard = AVDISCARD_NONE;
768
769     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
770                             &fg->nb_inputs, fg->nb_inputs + 1);
771     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
772         exit_program(1);
773     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
774     fg->inputs[fg->nb_inputs - 1]->graph = fg;
775
776     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
777                               &ist->nb_filters, ist->nb_filters + 1);
778     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
779 }
780
781 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
782 {
783     char *pix_fmts;
784     OutputStream *ost = ofilter->ost;
785     AVCodecContext *codec = ost->st->codec;
786     AVFilterContext *last_filter = out->filter_ctx;
787     int pad_idx = out->pad_idx;
788     int ret;
789     char name[255];
790     AVBufferSinkParams *buffersink_params = av_buffersink_params_alloc();
791
792     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
793     ret = avfilter_graph_create_filter(&ofilter->filter,
794                                        avfilter_get_by_name("buffersink"),
795                                        name, NULL, NULL/*buffersink_params*/, fg->graph);
796     av_freep(&buffersink_params);
797
798     if (ret < 0)
799         return ret;
800
801     if (codec->width || codec->height) {
802         char args[255];
803         AVFilterContext *filter;
804
805         snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
806                  codec->width,
807                  codec->height,
808                  (unsigned)ost->sws_flags);
809         snprintf(name, sizeof(name), "scaler for output stream %d:%d",
810                  ost->file_index, ost->index);
811         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
812                                                 name, args, NULL, fg->graph)) < 0)
813             return ret;
814         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
815             return ret;
816
817         last_filter = filter;
818         pad_idx = 0;
819     }
820
821     if ((pix_fmts = choose_pix_fmts(ost))) {
822         AVFilterContext *filter;
823         snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
824                  ost->file_index, ost->index);
825         if ((ret = avfilter_graph_create_filter(&filter,
826                                                 avfilter_get_by_name("format"),
827                                                 "format", pix_fmts, NULL,
828                                                 fg->graph)) < 0)
829             return ret;
830         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
831             return ret;
832
833         last_filter = filter;
834         pad_idx     = 0;
835         av_freep(&pix_fmts);
836     }
837
838     if (ost->frame_rate.num && 0) {
839         AVFilterContext *fps;
840         char args[255];
841
842         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
843                  ost->frame_rate.den);
844         snprintf(name, sizeof(name), "fps for output stream %d:%d",
845                  ost->file_index, ost->index);
846         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
847                                            name, args, NULL, fg->graph);
848         if (ret < 0)
849             return ret;
850
851         ret = avfilter_link(last_filter, pad_idx, fps, 0);
852         if (ret < 0)
853             return ret;
854         last_filter = fps;
855         pad_idx = 0;
856     }
857
858     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
859         return ret;
860
861     return 0;
862 }
863
864 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
865 {
866     OutputStream *ost = ofilter->ost;
867     AVCodecContext *codec  = ost->st->codec;
868     AVFilterContext *last_filter = out->filter_ctx;
869     int pad_idx = out->pad_idx;
870     char *sample_fmts, *sample_rates, *channel_layouts;
871     char name[255];
872     int ret;
873
874
875     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
876     ret = avfilter_graph_create_filter(&ofilter->filter,
877                                        avfilter_get_by_name("abuffersink_old"),
878                                        name, NULL, NULL, fg->graph);
879     if (ret < 0)
880         return ret;
881
882 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
883     AVFilterContext *filt_ctx;                                              \
884                                                                             \
885     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
886            "similarly to -af " filter_name "=%s.\n", arg);                  \
887                                                                             \
888     ret = avfilter_graph_create_filter(&filt_ctx,                           \
889                                        avfilter_get_by_name(filter_name),   \
890                                        filter_name, arg, NULL, fg->graph);  \
891     if (ret < 0)                                                            \
892         return ret;                                                         \
893                                                                             \
894     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
895     if (ret < 0)                                                            \
896         return ret;                                                         \
897                                                                             \
898     last_filter = filt_ctx;                                                 \
899     pad_idx = 0;                                                            \
900 } while (0)
901     if (ost->audio_channels_mapped) {
902         int i;
903         AVBPrint pan_buf;
904         av_bprint_init(&pan_buf, 256, 8192);
905         av_bprintf(&pan_buf, "0x%"PRIx64,
906                    av_get_default_channel_layout(ost->audio_channels_mapped));
907         for (i = 0; i < ost->audio_channels_mapped; i++)
908             if (ost->audio_channels_map[i] != -1)
909                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
910
911         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
912         av_bprint_finalize(&pan_buf, NULL);
913     }
914
915     if (codec->channels && !codec->channel_layout)
916         codec->channel_layout = av_get_default_channel_layout(codec->channels);
917
918     sample_fmts     = choose_sample_fmts(ost);
919     sample_rates    = choose_sample_rates(ost);
920     channel_layouts = choose_channel_layouts(ost);
921     if (sample_fmts || sample_rates || channel_layouts) {
922         AVFilterContext *format;
923         char args[256];
924         int len = 0;
925
926         if (sample_fmts)
927             len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
928                             sample_fmts);
929         if (sample_rates)
930             len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
931                             sample_rates);
932         if (channel_layouts)
933             len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
934                             channel_layouts);
935         args[len - 1] = 0;
936
937         av_freep(&sample_fmts);
938         av_freep(&sample_rates);
939         av_freep(&channel_layouts);
940
941         snprintf(name, sizeof(name), "audio format for output stream %d:%d",
942                  ost->file_index, ost->index);
943         ret = avfilter_graph_create_filter(&format,
944                                            avfilter_get_by_name("aformat"),
945                                            name, args, NULL, fg->graph);
946         if (ret < 0)
947             return ret;
948
949         ret = avfilter_link(last_filter, pad_idx, format, 0);
950         if (ret < 0)
951             return ret;
952
953         last_filter = format;
954         pad_idx = 0;
955     }
956
957     if (audio_volume != 256 && 0) {
958         char args[256];
959
960         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
961         AUTO_INSERT_FILTER("-vol", "volume", args);
962     }
963
964     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
965         return ret;
966
967     return 0;
968 }
969
970 #define DESCRIBE_FILTER_LINK(f, inout, in)                         \
971 {                                                                  \
972     AVFilterContext *ctx = inout->filter_ctx;                      \
973     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;  \
974     int       nb_pads = in ? ctx->input_count : ctx->output_count; \
975     AVIOContext *pb;                                               \
976                                                                    \
977     if (avio_open_dyn_buf(&pb) < 0)                                \
978         exit_program(1);                                           \
979                                                                    \
980     avio_printf(pb, "%s", ctx->filter->name);                      \
981     if (nb_pads > 1)                                               \
982         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
983     avio_w8(pb, 0);                                                \
984     avio_close_dyn_buf(pb, &f->name);                              \
985 }
986
987 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
988 {
989     av_freep(&ofilter->name);
990     DESCRIBE_FILTER_LINK(ofilter, out, 0);
991
992     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
993     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
994     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
995     default: av_assert0(0);
996     }
997 }
998
999 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
1000                                         AVFilterInOut *in)
1001 {
1002     AVFilterContext *first_filter = in->filter_ctx;
1003     AVFilter *filter = avfilter_get_by_name("buffer");
1004     InputStream *ist = ifilter->ist;
1005     AVRational tb = ist->framerate.num ? (AVRational){ist->framerate.den,
1006                                                       ist->framerate.num} :
1007                                          ist->st->time_base;
1008     AVRational fr = ist->framerate.num ? ist->framerate :
1009                                          ist->st->r_frame_rate;
1010     AVRational sar;
1011     AVBPrint args;
1012     char name[255];
1013     int pad_idx = in->pad_idx;
1014     int ret;
1015
1016     sar = ist->st->sample_aspect_ratio.num ?
1017           ist->st->sample_aspect_ratio :
1018           ist->st->codec->sample_aspect_ratio;
1019     if(!sar.den)
1020         sar = (AVRational){0,1};
1021     av_bprint_init(&args, 0, 1);
1022     av_bprintf(&args,
1023              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
1024              "pixel_aspect=%d/%d:sws_param=flags=%d", ist->st->codec->width,
1025              ist->st->codec->height, ist->st->codec->pix_fmt,
1026              tb.num, tb.den, sar.num, sar.den,
1027              SWS_BILINEAR + ((ist->st->codec->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
1028     if (fr.num && fr.den)
1029         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
1030     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
1031              ist->file_index, ist->st->index);
1032
1033     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, name,
1034                                             args.str, NULL, fg->graph)) < 0)
1035         return ret;
1036
1037     if (ist->framerate.num) {
1038         AVFilterContext *setpts;
1039
1040         snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
1041                  ist->file_index, ist->st->index);
1042         if ((ret = avfilter_graph_create_filter(&setpts,
1043                                                 avfilter_get_by_name("setpts"),
1044                                                 name, "N", NULL,
1045                                                 fg->graph)) < 0)
1046             return ret;
1047
1048         if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0)
1049             return ret;
1050
1051         first_filter = setpts;
1052         pad_idx = 0;
1053     }
1054
1055     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
1056         return ret;
1057     return 0;
1058 }
1059
1060 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
1061                                         AVFilterInOut *in)
1062 {
1063     AVFilterContext *first_filter = in->filter_ctx;
1064     AVFilter *filter = avfilter_get_by_name("abuffer");
1065     InputStream *ist = ifilter->ist;
1066     int pad_idx = in->pad_idx;
1067     char args[255], name[255];
1068     int ret;
1069
1070     snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s"
1071              ":channel_layout=0x%"PRIx64,
1072              ist->st->time_base.num, ist->st->time_base.den,
1073              ist->st->codec->sample_rate,
1074              av_get_sample_fmt_name(ist->st->codec->sample_fmt),
1075              ist->st->codec->channel_layout);
1076     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
1077              ist->file_index, ist->st->index);
1078
1079     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter,
1080                                             name, args, NULL,
1081                                             fg->graph)) < 0)
1082         return ret;
1083
1084 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
1085     AVFilterContext *filt_ctx;                                              \
1086                                                                             \
1087     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
1088            "similarly to -af " filter_name "=%s.\n", arg);                  \
1089                                                                             \
1090     snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d",      \
1091                 fg->index, filter_name, ist->file_index, ist->st->index);   \
1092     ret = avfilter_graph_create_filter(&filt_ctx,                           \
1093                                        avfilter_get_by_name(filter_name),   \
1094                                        name, arg, NULL, fg->graph);         \
1095     if (ret < 0)                                                            \
1096         return ret;                                                         \
1097                                                                             \
1098     ret = avfilter_link(filt_ctx, 0, first_filter, pad_idx);                \
1099     if (ret < 0)                                                            \
1100         return ret;                                                         \
1101                                                                             \
1102     first_filter = filt_ctx;                                                  \
1103 } while (0)
1104
1105     if (audio_sync_method > 0) {
1106         char args[256] = {0};
1107
1108         av_strlcatf(args, sizeof(args), "min_comp=0.001:min_hard_comp=%f", audio_drift_threshold);
1109         if (audio_sync_method > 1)
1110             av_strlcatf(args, sizeof(args), ":max_soft_comp=%f", audio_sync_method/(double)ist->st->codec->sample_rate);
1111         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
1112     }
1113
1114 //     if (ost->audio_channels_mapped) {
1115 //         int i;
1116 //         AVBPrint pan_buf;
1117 //         av_bprint_init(&pan_buf, 256, 8192);
1118 //         av_bprintf(&pan_buf, "0x%"PRIx64,
1119 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
1120 //         for (i = 0; i < ost->audio_channels_mapped; i++)
1121 //             if (ost->audio_channels_map[i] != -1)
1122 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
1123 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
1124 //         av_bprint_finalize(&pan_buf, NULL);
1125 //     }
1126
1127     if (audio_volume != 256) {
1128         char args[256];
1129
1130         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
1131         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
1132     }
1133     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
1134         return ret;
1135
1136     return 0;
1137 }
1138
1139 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
1140                                   AVFilterInOut *in)
1141 {
1142     av_freep(&ifilter->name);
1143     DESCRIBE_FILTER_LINK(ifilter, in, 1);
1144
1145     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
1146     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
1147     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
1148     default: av_assert0(0);
1149     }
1150 }
1151
1152 static int configure_filtergraph(FilterGraph *fg)
1153 {
1154     AVFilterInOut *inputs, *outputs, *cur;
1155     int ret, i, init = !fg->graph, simple = !fg->graph_desc;
1156     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1157                                       fg->graph_desc;
1158
1159     avfilter_graph_free(&fg->graph);
1160     if (!(fg->graph = avfilter_graph_alloc()))
1161         return AVERROR(ENOMEM);
1162
1163     if (simple) {
1164         OutputStream *ost = fg->outputs[0]->ost;
1165         char args[255];
1166         snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
1167         fg->graph->scale_sws_opts = av_strdup(args);
1168     }
1169
1170     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1171         return ret;
1172
1173     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1174         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
1175                "exactly one input and output.\n", graph_desc);
1176         return AVERROR(EINVAL);
1177     }
1178
1179     for (cur = inputs; !simple && init && cur; cur = cur->next)
1180         init_input_filter(fg, cur);
1181
1182     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1183         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
1184             return ret;
1185     avfilter_inout_free(&inputs);
1186
1187     if (!init || simple) {
1188         /* we already know the mappings between lavfi outputs and output streams,
1189          * so we can finish the setup */
1190         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1191             configure_output_filter(fg, fg->outputs[i], cur);
1192         avfilter_inout_free(&outputs);
1193
1194         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1195             return ret;
1196     } else {
1197         /* wait until output mappings are processed */
1198         for (cur = outputs; cur;) {
1199             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
1200                                      &fg->nb_outputs, fg->nb_outputs + 1);
1201             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
1202                 exit_program(1);
1203             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
1204             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
1205             cur = cur->next;
1206             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
1207         }
1208     }
1209
1210     return 0;
1211 }
1212
1213 static int configure_complex_filters(void)
1214 {
1215     int i, ret = 0;
1216
1217     for (i = 0; i < nb_filtergraphs; i++)
1218         if (!filtergraphs[i]->graph &&
1219             (ret = configure_filtergraph(filtergraphs[i])) < 0)
1220             return ret;
1221     return 0;
1222 }
1223
1224 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1225 {
1226     int i;
1227     for (i = 0; i < fg->nb_inputs; i++)
1228         if (fg->inputs[i]->ist == ist)
1229             return 1;
1230     return 0;
1231 }
1232
1233 static void term_exit(void)
1234 {
1235     av_log(NULL, AV_LOG_QUIET, "%s", "");
1236 #if HAVE_TERMIOS_H
1237     if(restore_tty)
1238         tcsetattr (0, TCSANOW, &oldtty);
1239 #endif
1240 }
1241
1242 static volatile int received_sigterm = 0;
1243
1244 static void sigterm_handler(int sig)
1245 {
1246     received_sigterm = sig;
1247     received_nb_signals++;
1248     term_exit();
1249     if(received_nb_signals > 3)
1250         exit(123);
1251 }
1252
1253 static void term_init(void)
1254 {
1255 #if HAVE_TERMIOS_H
1256     if(!run_as_daemon){
1257         struct termios tty;
1258         int istty = 1;
1259 #if HAVE_ISATTY
1260         istty = isatty(0) && isatty(2);
1261 #endif
1262         if (istty && tcgetattr (0, &tty) == 0) {
1263             oldtty = tty;
1264             restore_tty = 1;
1265             atexit(term_exit);
1266
1267             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1268                              |INLCR|IGNCR|ICRNL|IXON);
1269             tty.c_oflag |= OPOST;
1270             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1271             tty.c_cflag &= ~(CSIZE|PARENB);
1272             tty.c_cflag |= CS8;
1273             tty.c_cc[VMIN] = 1;
1274             tty.c_cc[VTIME] = 0;
1275
1276             tcsetattr (0, TCSANOW, &tty);
1277         }
1278         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
1279     }
1280 #endif
1281     avformat_network_deinit();
1282
1283     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1284     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1285 #ifdef SIGXCPU
1286     signal(SIGXCPU, sigterm_handler);
1287 #endif
1288 }
1289
1290 /* read a key without blocking */
1291 static int read_key(void)
1292 {
1293     unsigned char ch;
1294 #if HAVE_TERMIOS_H
1295     int n = 1;
1296     struct timeval tv;
1297     fd_set rfds;
1298
1299     FD_ZERO(&rfds);
1300     FD_SET(0, &rfds);
1301     tv.tv_sec = 0;
1302     tv.tv_usec = 0;
1303     n = select(1, &rfds, NULL, NULL, &tv);
1304     if (n > 0) {
1305         n = read(0, &ch, 1);
1306         if (n == 1)
1307             return ch;
1308
1309         return n;
1310     }
1311 #elif HAVE_KBHIT
1312 #    if HAVE_PEEKNAMEDPIPE
1313     static int is_pipe;
1314     static HANDLE input_handle;
1315     DWORD dw, nchars;
1316     if(!input_handle){
1317         input_handle = GetStdHandle(STD_INPUT_HANDLE);
1318         is_pipe = !GetConsoleMode(input_handle, &dw);
1319     }
1320
1321     if (stdin->_cnt > 0) {
1322         read(0, &ch, 1);
1323         return ch;
1324     }
1325     if (is_pipe) {
1326         /* When running under a GUI, you will end here. */
1327         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL))
1328             return -1;
1329         //Read it
1330         if(nchars != 0) {
1331             read(0, &ch, 1);
1332             return ch;
1333         }else{
1334             return -1;
1335         }
1336     }
1337 #    endif
1338     if(kbhit())
1339         return(getch());
1340 #endif
1341     return -1;
1342 }
1343
1344 static int decode_interrupt_cb(void *ctx)
1345 {
1346     return received_nb_signals > 1;
1347 }
1348
1349 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1350
1351 void av_noreturn exit_program(int ret)
1352 {
1353     int i, j;
1354
1355     for (i = 0; i < nb_filtergraphs; i++) {
1356         avfilter_graph_free(&filtergraphs[i]->graph);
1357         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
1358             av_freep(&filtergraphs[i]->inputs[j]->name);
1359             av_freep(&filtergraphs[i]->inputs[j]);
1360         }
1361         av_freep(&filtergraphs[i]->inputs);
1362         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
1363             av_freep(&filtergraphs[i]->outputs[j]->name);
1364             av_freep(&filtergraphs[i]->outputs[j]);
1365         }
1366         av_freep(&filtergraphs[i]->outputs);
1367         av_freep(&filtergraphs[i]);
1368     }
1369     av_freep(&filtergraphs);
1370
1371     /* close files */
1372     for (i = 0; i < nb_output_files; i++) {
1373         AVFormatContext *s = output_files[i]->ctx;
1374         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1375             avio_close(s->pb);
1376         avformat_free_context(s);
1377         av_dict_free(&output_files[i]->opts);
1378         av_freep(&output_files[i]);
1379     }
1380     for (i = 0; i < nb_output_streams; i++) {
1381         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1382         while (bsfc) {
1383             AVBitStreamFilterContext *next = bsfc->next;
1384             av_bitstream_filter_close(bsfc);
1385             bsfc = next;
1386         }
1387         output_streams[i]->bitstream_filters = NULL;
1388
1389         av_freep(&output_streams[i]->forced_keyframes);
1390         av_freep(&output_streams[i]->filtered_frame);
1391         av_freep(&output_streams[i]->avfilter);
1392         av_freep(&output_streams[i]);
1393     }
1394     for (i = 0; i < nb_input_files; i++) {
1395         avformat_close_input(&input_files[i]->ctx);
1396         av_freep(&input_files[i]);
1397     }
1398     for (i = 0; i < nb_input_streams; i++) {
1399         av_freep(&input_streams[i]->decoded_frame);
1400         av_dict_free(&input_streams[i]->opts);
1401         free_buffer_pool(&input_streams[i]->buffer_pool);
1402         av_freep(&input_streams[i]->filters);
1403         av_freep(&input_streams[i]);
1404     }
1405
1406     if (vstats_file)
1407         fclose(vstats_file);
1408     av_free(vstats_filename);
1409
1410     av_freep(&input_streams);
1411     av_freep(&input_files);
1412     av_freep(&output_streams);
1413     av_freep(&output_files);
1414
1415     uninit_opts();
1416
1417     avfilter_uninit();
1418     avformat_network_deinit();
1419
1420     if (received_sigterm) {
1421         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1422                (int) received_sigterm);
1423         exit (255);
1424     }
1425
1426     exit(ret);
1427 }
1428
1429 static void assert_avoptions(AVDictionary *m)
1430 {
1431     AVDictionaryEntry *t;
1432     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1433         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1434         exit_program(1);
1435     }
1436 }
1437
1438 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1439 {
1440     const char *codec_string = encoder ? "encoder" : "decoder";
1441     AVCodec *codec;
1442     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1443         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1444         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1445                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1446                 codec_string, c->codec->name);
1447         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1448         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1449             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1450                    codec_string, codec->name);
1451         exit_program(1);
1452     }
1453 }
1454
1455 static void choose_sample_fmt(AVStream *st, AVCodec *codec)
1456 {
1457     if (codec && codec->sample_fmts) {
1458         const enum AVSampleFormat *p = codec->sample_fmts;
1459         for (; *p != -1; p++) {
1460             if (*p == st->codec->sample_fmt)
1461                 break;
1462         }
1463         if (*p == -1) {
1464             if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
1465                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
1466             if(av_get_sample_fmt_name(st->codec->sample_fmt))
1467             av_log(NULL, AV_LOG_WARNING,
1468                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
1469                    av_get_sample_fmt_name(st->codec->sample_fmt),
1470                    codec->name,
1471                    av_get_sample_fmt_name(codec->sample_fmts[0]));
1472             st->codec->sample_fmt = codec->sample_fmts[0];
1473         }
1474     }
1475 }
1476
1477 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1478 {
1479     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1480     AVCodecContext          *avctx = ost->st->codec;
1481     int ret;
1482
1483     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
1484         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
1485         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1486
1487     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1488         int64_t max = ost->st->cur_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
1489         if (ost->st->cur_dts && ost->st->cur_dts != AV_NOPTS_VALUE &&  max > pkt->dts) {
1490             av_log(s, max - pkt->dts > 2 ? AV_LOG_WARNING : AV_LOG_DEBUG, "Audio timestamp %"PRId64" < %"PRId64" invalid, cliping\n", pkt->dts, max);
1491             pkt->pts = pkt->dts = max;
1492         }
1493     }
1494
1495     /*
1496      * Audio encoders may split the packets --  #frames in != #packets out.
1497      * But there is no reordering, so we can limit the number of output packets
1498      * by simply dropping them here.
1499      * Counting encoded video frames needs to be done separately because of
1500      * reordering, see do_video_out()
1501      */
1502     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1503         if (ost->frame_number >= ost->max_frames) {
1504             av_free_packet(pkt);
1505             return;
1506         }
1507         ost->frame_number++;
1508     }
1509
1510     while (bsfc) {
1511         AVPacket new_pkt = *pkt;
1512         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1513                                            &new_pkt.data, &new_pkt.size,
1514                                            pkt->data, pkt->size,
1515                                            pkt->flags & AV_PKT_FLAG_KEY);
1516         if (a > 0) {
1517             av_free_packet(pkt);
1518             new_pkt.destruct = av_destruct_packet;
1519         } else if (a < 0) {
1520             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
1521                    bsfc->filter->name, pkt->stream_index,
1522                    avctx->codec ? avctx->codec->name : "copy");
1523             print_error("", a);
1524             if (exit_on_error)
1525                 exit_program(1);
1526         }
1527         *pkt = new_pkt;
1528
1529         bsfc = bsfc->next;
1530     }
1531
1532     pkt->stream_index = ost->index;
1533     ret = av_interleaved_write_frame(s, pkt);
1534     if (ret < 0) {
1535         print_error("av_interleaved_write_frame()", ret);
1536         exit_program(1);
1537     }
1538 }
1539
1540 static int check_recording_time(OutputStream *ost)
1541 {
1542     OutputFile *of = output_files[ost->file_index];
1543
1544     if (of->recording_time != INT64_MAX &&
1545         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
1546                       AV_TIME_BASE_Q) >= 0) {
1547         ost->is_past_recording_time = 1;
1548         return 0;
1549     }
1550     return 1;
1551 }
1552
1553 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1554                          AVFrame *frame)
1555 {
1556     AVCodecContext *enc = ost->st->codec;
1557     AVPacket pkt;
1558     int got_packet = 0;
1559
1560     av_init_packet(&pkt);
1561     pkt.data = NULL;
1562     pkt.size = 0;
1563 #if 0
1564     if (!check_recording_time(ost))
1565         return;
1566 #endif
1567     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
1568         frame->pts = ost->sync_opts;
1569     ost->sync_opts = frame->pts + frame->nb_samples;
1570
1571     av_assert0(pkt.size || !pkt.data);
1572     update_benchmark(NULL);
1573     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1574         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
1575         exit_program(1);
1576     }
1577     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
1578
1579     if (got_packet) {
1580         if (pkt.pts != AV_NOPTS_VALUE)
1581             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1582         if (pkt.dts != AV_NOPTS_VALUE)
1583             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1584         if (pkt.duration > 0)
1585             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1586
1587         if (debug_ts) {
1588             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
1589                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1590                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1591                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1592         }
1593
1594         write_frame(s, &pkt, ost);
1595
1596         audio_size += pkt.size;
1597         av_free_packet(&pkt);
1598     }
1599 }
1600
1601 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1602 {
1603     AVCodecContext *dec;
1604     AVPicture *picture2;
1605     AVPicture picture_tmp;
1606     uint8_t *buf = 0;
1607
1608     dec = ist->st->codec;
1609
1610     /* deinterlace : must be done before any resize */
1611     if (do_deinterlace) {
1612         int size;
1613
1614         /* create temporary picture */
1615         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1616         buf  = av_malloc(size);
1617         if (!buf)
1618             return;
1619
1620         picture2 = &picture_tmp;
1621         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1622
1623         if (avpicture_deinterlace(picture2, picture,
1624                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1625             /* if error, do not deinterlace */
1626             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1627             av_free(buf);
1628             buf = NULL;
1629             picture2 = picture;
1630         }
1631     } else {
1632         picture2 = picture;
1633     }
1634
1635     if (picture != picture2)
1636         *picture = *picture2;
1637     *bufp = buf;
1638 }
1639
1640 static void do_subtitle_out(AVFormatContext *s,
1641                             OutputStream *ost,
1642                             InputStream *ist,
1643                             AVSubtitle *sub,
1644                             int64_t pts)
1645 {
1646     static uint8_t *subtitle_out = NULL;
1647     int subtitle_out_max_size = 1024 * 1024;
1648     int subtitle_out_size, nb, i;
1649     AVCodecContext *enc;
1650     AVPacket pkt;
1651
1652     if (pts == AV_NOPTS_VALUE) {
1653         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1654         if (exit_on_error)
1655             exit_program(1);
1656         return;
1657     }
1658
1659     enc = ost->st->codec;
1660
1661     if (!subtitle_out) {
1662         subtitle_out = av_malloc(subtitle_out_max_size);
1663     }
1664
1665     /* Note: DVB subtitle need one packet to draw them and one other
1666        packet to clear them */
1667     /* XXX: signal it in the codec context ? */
1668     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1669         nb = 2;
1670     else
1671         nb = 1;
1672
1673     for (i = 0; i < nb; i++) {
1674         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1675
1676         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1677         // start_display_time is required to be 0
1678         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1679         sub->end_display_time  -= sub->start_display_time;
1680         sub->start_display_time = 0;
1681         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1682                                                     subtitle_out_max_size, sub);
1683         if (subtitle_out_size < 0) {
1684             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1685             exit_program(1);
1686         }
1687
1688         av_init_packet(&pkt);
1689         pkt.data = subtitle_out;
1690         pkt.size = subtitle_out_size;
1691         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1692         pkt.duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->st->time_base);
1693         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1694             /* XXX: the pts correction is handled here. Maybe handling
1695                it in the codec would be better */
1696             if (i == 0)
1697                 pkt.pts += 90 * sub->start_display_time;
1698             else
1699                 pkt.pts += 90 * sub->end_display_time;
1700         }
1701         write_frame(s, &pkt, ost);
1702         subtitle_size += pkt.size;
1703     }
1704 }
1705
1706 static void do_video_out(AVFormatContext *s,
1707                          OutputStream *ost,
1708                          AVFrame *in_picture,
1709                          float quality)
1710 {
1711     int ret, format_video_sync;
1712     AVPacket pkt;
1713     AVCodecContext *enc = ost->st->codec;
1714     int nb_frames;
1715     double sync_ipts, delta;
1716     double duration = 0;
1717     int frame_size = 0;
1718     InputStream *ist = NULL;
1719
1720     if (ost->source_index >= 0)
1721         ist = input_streams[ost->source_index];
1722
1723     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
1724         duration = 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base));
1725
1726     sync_ipts = in_picture->pts;
1727     delta = sync_ipts - ost->sync_opts + duration;
1728
1729     /* by default, we output a single frame */
1730     nb_frames = 1;
1731
1732     format_video_sync = video_sync_method;
1733     if (format_video_sync == VSYNC_AUTO)
1734         format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : 1;
1735
1736     switch (format_video_sync) {
1737     case VSYNC_CFR:
1738         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
1739         if (delta < -1.1)
1740             nb_frames = 0;
1741         else if (delta > 1.1)
1742             nb_frames = lrintf(delta);
1743         break;
1744     case VSYNC_VFR:
1745         if (delta <= -0.6)
1746             nb_frames = 0;
1747         else if (delta > 0.6)
1748             ost->sync_opts = lrint(sync_ipts);
1749         break;
1750     case VSYNC_DROP:
1751     case VSYNC_PASSTHROUGH:
1752         ost->sync_opts = lrint(sync_ipts);
1753         break;
1754     default:
1755         av_assert0(0);
1756     }
1757
1758     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
1759     if (nb_frames == 0) {
1760         nb_frames_drop++;
1761         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1762         return;
1763     } else if (nb_frames > 1) {
1764         nb_frames_dup += nb_frames - 1;
1765         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
1766     }
1767
1768
1769 duplicate_frame:
1770     av_init_packet(&pkt);
1771     pkt.data = NULL;
1772     pkt.size = 0;
1773
1774     in_picture->pts = ost->sync_opts;
1775
1776     if (s->oformat->flags & AVFMT_RAWPICTURE &&
1777         enc->codec->id == CODEC_ID_RAWVIDEO) {
1778         /* raw pictures are written as AVPicture structure to
1779            avoid any copies. We support temporarily the older
1780            method. */
1781         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1782         enc->coded_frame->top_field_first  = in_picture->top_field_first;
1783         pkt.data   = (uint8_t *)in_picture;
1784         pkt.size   =  sizeof(AVPicture);
1785         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
1786         pkt.flags |= AV_PKT_FLAG_KEY;
1787
1788         write_frame(s, &pkt, ost);
1789         video_size += pkt.size;
1790     } else {
1791         int got_packet;
1792         AVFrame big_picture;
1793
1794         big_picture = *in_picture;
1795         /* better than nothing: use input picture interlaced
1796            settings */
1797         big_picture.interlaced_frame = in_picture->interlaced_frame;
1798         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1799             if (ost->top_field_first == -1)
1800                 big_picture.top_field_first = in_picture->top_field_first;
1801             else
1802                 big_picture.top_field_first = !!ost->top_field_first;
1803         }
1804
1805         /* handles same_quant here. This is not correct because it may
1806            not be a global option */
1807         big_picture.quality = quality;
1808         if (!enc->me_threshold)
1809             big_picture.pict_type = 0;
1810         if (ost->forced_kf_index < ost->forced_kf_count &&
1811             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1812             big_picture.pict_type = AV_PICTURE_TYPE_I;
1813             ost->forced_kf_index++;
1814         }
1815         update_benchmark(NULL);
1816         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
1817         update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
1818         if (ret < 0) {
1819             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1820             exit_program(1);
1821         }
1822
1823         if (got_packet) {
1824             if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
1825                 pkt.pts = ost->sync_opts;
1826
1827             if (pkt.pts != AV_NOPTS_VALUE)
1828                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1829             if (pkt.dts != AV_NOPTS_VALUE)
1830                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1831
1832             if (debug_ts) {
1833                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1834                     "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1835                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1836                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1837             }
1838
1839             write_frame(s, &pkt, ost);
1840             frame_size = pkt.size;
1841             video_size += pkt.size;
1842             av_free_packet(&pkt);
1843
1844             /* if two pass, output log */
1845             if (ost->logfile && enc->stats_out) {
1846                 fprintf(ost->logfile, "%s", enc->stats_out);
1847             }
1848         }
1849     }
1850     ost->sync_opts++;
1851     /*
1852      * For video, number of frames in == number of packets out.
1853      * But there may be reordering, so we can't throw away frames on encoder
1854      * flush, we need to limit them here, before they go into encoder.
1855      */
1856     ost->frame_number++;
1857
1858     if(--nb_frames)
1859         goto duplicate_frame;
1860
1861     if (vstats_filename && frame_size)
1862         do_video_stats(output_files[ost->file_index]->ctx, ost, frame_size);
1863 }
1864
1865 static double psnr(double d)
1866 {
1867     return -10.0 * log(d) / log(10.0);
1868 }
1869
1870 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1871                            int frame_size)
1872 {
1873     AVCodecContext *enc;
1874     int frame_number;
1875     double ti1, bitrate, avg_bitrate;
1876
1877     /* this is executed just the first time do_video_stats is called */
1878     if (!vstats_file) {
1879         vstats_file = fopen(vstats_filename, "w");
1880         if (!vstats_file) {
1881             perror("fopen");
1882             exit_program(1);
1883         }
1884     }
1885
1886     enc = ost->st->codec;
1887     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1888         frame_number = ost->frame_number;
1889         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1890         if (enc->flags&CODEC_FLAG_PSNR)
1891             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1892
1893         fprintf(vstats_file,"f_size= %6d ", frame_size);
1894         /* compute pts value */
1895         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1896         if (ti1 < 0.01)
1897             ti1 = 0.01;
1898
1899         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1900         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1901         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1902                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1903         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1904     }
1905 }
1906
1907 /* check for new output on any of the filtergraphs */
1908 static int poll_filters(void)
1909 {
1910     AVFilterBufferRef *picref;
1911     AVFrame *filtered_frame = NULL;
1912     int i, ret, ret_all;
1913     unsigned nb_success, nb_eof;
1914     int64_t frame_pts;
1915
1916     while (1) {
1917         /* Reap all buffers present in the buffer sinks */
1918         for (i = 0; i < nb_output_streams; i++) {
1919             OutputStream *ost = output_streams[i];
1920             OutputFile    *of = output_files[ost->file_index];
1921             int ret = 0;
1922
1923             if (!ost->filter)
1924                 continue;
1925
1926             if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
1927                 return AVERROR(ENOMEM);
1928             } else
1929                 avcodec_get_frame_defaults(ost->filtered_frame);
1930             filtered_frame = ost->filtered_frame;
1931
1932             while (!ost->is_past_recording_time) {
1933                 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1934                     !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1935                     ret = av_buffersink_read_samples(ost->filter->filter, &picref,
1936                                                     ost->st->codec->frame_size);
1937                 else if(ost->enc->type == AVMEDIA_TYPE_AUDIO)
1938                     ret = av_buffersink_read(ost->filter->filter, &picref);
1939                 else
1940                     ret = av_buffersink_get_buffer_ref(ost->filter->filter, &picref,
1941                                                        AV_BUFFERSINK_FLAG_NO_REQUEST);
1942                 if (ret < 0) {
1943                     if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1944                         char buf[256];
1945                         av_strerror(ret, buf, sizeof(buf));
1946                         av_log(NULL, AV_LOG_WARNING,
1947                                "Error in av_buffersink_get_buffer_ref(): %s\n", buf);
1948                     }
1949                     break;
1950                 }
1951                 frame_pts = AV_NOPTS_VALUE;
1952                 if (picref->pts != AV_NOPTS_VALUE) {
1953                     filtered_frame->pts = frame_pts = av_rescale_q(picref->pts,
1954                                                     ost->filter->filter->inputs[0]->time_base,
1955                                                     ost->st->codec->time_base) -
1956                                         av_rescale_q(of->start_time,
1957                                                     AV_TIME_BASE_Q,
1958                                                     ost->st->codec->time_base);
1959
1960                     if (of->start_time && filtered_frame->pts < 0) {
1961                         avfilter_unref_buffer(picref);
1962                         continue;
1963                     }
1964                 }
1965                 //if (ost->source_index >= 0)
1966                 //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1967
1968
1969                 switch (ost->filter->filter->inputs[0]->type) {
1970                 case AVMEDIA_TYPE_VIDEO:
1971                     avfilter_copy_buf_props(filtered_frame, picref);
1972                     filtered_frame->pts = frame_pts;
1973                     if (!ost->frame_aspect_ratio)
1974                         ost->st->codec->sample_aspect_ratio = picref->video->sample_aspect_ratio;
1975
1976                     do_video_out(of->ctx, ost, filtered_frame,
1977                                  same_quant ? ost->last_quality :
1978                                               ost->st->codec->global_quality);
1979                     break;
1980                 case AVMEDIA_TYPE_AUDIO:
1981                     avfilter_copy_buf_props(filtered_frame, picref);
1982                     filtered_frame->pts = frame_pts;
1983                     do_audio_out(of->ctx, ost, filtered_frame);
1984                     break;
1985                 default:
1986                     // TODO support subtitle filters
1987                     av_assert0(0);
1988                 }
1989
1990                 avfilter_unref_buffer(picref);
1991             }
1992         }
1993         /* Request frames through all the graphs */
1994         ret_all = nb_success = nb_eof = 0;
1995         for (i = 0; i < nb_filtergraphs; i++) {
1996             ret = avfilter_graph_request_oldest(filtergraphs[i]->graph);
1997             if (!ret) {
1998                 nb_success++;
1999             } else if (ret == AVERROR_EOF) {
2000                 nb_eof++;
2001             } else if (ret != AVERROR(EAGAIN)) {
2002                 char buf[256];
2003                 av_strerror(ret, buf, sizeof(buf));
2004                 av_log(NULL, AV_LOG_WARNING,
2005                        "Error in request_frame(): %s\n", buf);
2006                 ret_all = ret;
2007             }
2008         }
2009         if (!nb_success)
2010             break;
2011         /* Try again if anything succeeded */
2012     }
2013     return nb_eof == nb_filtergraphs ? AVERROR_EOF : ret_all;
2014 }
2015
2016 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
2017 {
2018     char buf[1024];
2019     OutputStream *ost;
2020     AVFormatContext *oc;
2021     int64_t total_size;
2022     AVCodecContext *enc;
2023     int frame_number, vid, i;
2024     double bitrate;
2025     int64_t pts = INT64_MAX;
2026     static int64_t last_time = -1;
2027     static int qp_histogram[52];
2028     int hours, mins, secs, us;
2029
2030     if (!print_stats && !is_last_report)
2031         return;
2032
2033     if (!is_last_report) {
2034         if (last_time == -1) {
2035             last_time = cur_time;
2036             return;
2037         }
2038         if ((cur_time - last_time) < 500000)
2039             return;
2040         last_time = cur_time;
2041     }
2042
2043
2044     oc = output_files[0]->ctx;
2045
2046     total_size = avio_size(oc->pb);
2047     if (total_size < 0) { // FIXME improve avio_size() so it works with non seekable output too
2048         total_size = avio_tell(oc->pb);
2049         if (total_size < 0)
2050             total_size = 0;
2051     }
2052
2053     buf[0] = '\0';
2054     vid = 0;
2055     for (i = 0; i < nb_output_streams; i++) {
2056         float q = -1;
2057         ost = output_streams[i];
2058         enc = ost->st->codec;
2059         if (!ost->stream_copy && enc->coded_frame)
2060             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
2061         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2062             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
2063         }
2064         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2065             float fps, t = (cur_time-timer_start) / 1000000.0;
2066
2067             frame_number = ost->frame_number;
2068             fps = t > 1 ? frame_number / t : 0;
2069             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
2070                      frame_number, fps < 9.95, fps, q);
2071             if (is_last_report)
2072                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
2073             if (qp_hist) {
2074                 int j;
2075                 int qp = lrintf(q);
2076                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
2077                     qp_histogram[qp]++;
2078                 for (j = 0; j < 32; j++)
2079                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
2080             }
2081             if (enc->flags&CODEC_FLAG_PSNR) {
2082                 int j;
2083                 double error, error_sum = 0;
2084                 double scale, scale_sum = 0;
2085                 char type[3] = { 'Y','U','V' };
2086                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
2087                 for (j = 0; j < 3; j++) {
2088                     if (is_last_report) {
2089                         error = enc->error[j];
2090                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
2091                     } else {
2092                         error = enc->coded_frame->error[j];
2093                         scale = enc->width * enc->height * 255.0 * 255.0;
2094                     }
2095                     if (j)
2096                         scale /= 4;
2097                     error_sum += error;
2098                     scale_sum += scale;
2099                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
2100                 }
2101                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
2102             }
2103             vid = 1;
2104         }
2105         /* compute min output value */
2106         pts = FFMIN(pts, av_rescale_q(ost->st->pts.val,
2107                                       ost->st->time_base, AV_TIME_BASE_Q));
2108     }
2109
2110     secs = pts / AV_TIME_BASE;
2111     us = pts % AV_TIME_BASE;
2112     mins = secs / 60;
2113     secs %= 60;
2114     hours = mins / 60;
2115     mins %= 60;
2116
2117     bitrate = pts ? total_size * 8 / (pts / 1000.0) : 0;
2118
2119     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2120              "size=%8.0fkB time=", total_size / 1024.0);
2121     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2122              "%02d:%02d:%02d.%02d ", hours, mins, secs,
2123              (100 * us) / AV_TIME_BASE);
2124     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2125              "bitrate=%6.1fkbits/s", bitrate);
2126
2127     if (nb_frames_dup || nb_frames_drop)
2128         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
2129                 nb_frames_dup, nb_frames_drop);
2130
2131     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
2132
2133     fflush(stderr);
2134
2135     if (is_last_report) {
2136         int64_t raw= audio_size + video_size + subtitle_size + extra_size;
2137         av_log(NULL, AV_LOG_INFO, "\n");
2138         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB subtitle:%1.0f global headers:%1.0fkB muxing overhead %f%%\n",
2139                video_size / 1024.0,
2140                audio_size / 1024.0,
2141                subtitle_size / 1024.0,
2142                extra_size / 1024.0,
2143                100.0 * (total_size - raw) / raw
2144         );
2145         if(video_size + audio_size + subtitle_size + extra_size == 0){
2146             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
2147         }
2148     }
2149 }
2150
2151 static void flush_encoders(void)
2152 {
2153     int i, ret;
2154
2155     for (i = 0; i < nb_output_streams; i++) {
2156         OutputStream   *ost = output_streams[i];
2157         AVCodecContext *enc = ost->st->codec;
2158         AVFormatContext *os = output_files[ost->file_index]->ctx;
2159         int stop_encoding = 0;
2160
2161         if (!ost->encoding_needed)
2162             continue;
2163
2164         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
2165             continue;
2166         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
2167             continue;
2168
2169         for (;;) {
2170             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
2171             const char *desc;
2172             int64_t *size;
2173
2174             switch (ost->st->codec->codec_type) {
2175             case AVMEDIA_TYPE_AUDIO:
2176                 encode = avcodec_encode_audio2;
2177                 desc   = "Audio";
2178                 size   = &audio_size;
2179                 break;
2180             case AVMEDIA_TYPE_VIDEO:
2181                 encode = avcodec_encode_video2;
2182                 desc   = "Video";
2183                 size   = &video_size;
2184                 break;
2185             default:
2186                 stop_encoding = 1;
2187             }
2188
2189             if (encode) {
2190                 AVPacket pkt;
2191                 int got_packet;
2192                 av_init_packet(&pkt);
2193                 pkt.data = NULL;
2194                 pkt.size = 0;
2195
2196                 update_benchmark(NULL);
2197                 ret = encode(enc, &pkt, NULL, &got_packet);
2198                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
2199                 if (ret < 0) {
2200                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
2201                     exit_program(1);
2202                 }
2203                 *size += pkt.size;
2204                 if (ost->logfile && enc->stats_out) {
2205                     fprintf(ost->logfile, "%s", enc->stats_out);
2206                 }
2207                 if (!got_packet) {
2208                     stop_encoding = 1;
2209                     break;
2210                 }
2211                 if (pkt.pts != AV_NOPTS_VALUE)
2212                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
2213                 if (pkt.dts != AV_NOPTS_VALUE)
2214                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
2215                 write_frame(os, &pkt, ost);
2216             }
2217
2218             if (stop_encoding)
2219                 break;
2220         }
2221     }
2222 }
2223
2224 /*
2225  * Check whether a packet from ist should be written into ost at this time
2226  */
2227 static int check_output_constraints(InputStream *ist, OutputStream *ost)
2228 {
2229     OutputFile *of = output_files[ost->file_index];
2230     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
2231
2232     if (ost->source_index != ist_index)
2233         return 0;
2234
2235     if (of->start_time && ist->pts < of->start_time)
2236         return 0;
2237
2238     if (of->recording_time != INT64_MAX &&
2239         av_compare_ts(ist->pts, AV_TIME_BASE_Q, of->recording_time + of->start_time,
2240                       (AVRational){ 1, 1000000 }) >= 0) {
2241         ost->is_past_recording_time = 1;
2242         return 0;
2243     }
2244
2245     return 1;
2246 }
2247
2248 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
2249 {
2250     OutputFile *of = output_files[ost->file_index];
2251     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
2252     AVPicture pict;
2253     AVPacket opkt;
2254
2255     av_init_packet(&opkt);
2256
2257     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
2258         !ost->copy_initial_nonkeyframes)
2259         return;
2260
2261     /* force the input stream PTS */
2262     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2263         audio_size += pkt->size;
2264     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2265         video_size += pkt->size;
2266         ost->sync_opts++;
2267     } else if (ost->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2268         subtitle_size += pkt->size;
2269     }
2270
2271     if (pkt->pts != AV_NOPTS_VALUE)
2272         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
2273     else
2274         opkt.pts = AV_NOPTS_VALUE;
2275
2276     if (pkt->dts == AV_NOPTS_VALUE)
2277         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
2278     else
2279         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
2280     opkt.dts -= ost_tb_start_time;
2281
2282     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
2283     opkt.flags    = pkt->flags;
2284
2285     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
2286     if (  ost->st->codec->codec_id != CODEC_ID_H264
2287        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
2288        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
2289        && ost->st->codec->codec_id != CODEC_ID_VC1
2290        ) {
2291         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
2292             opkt.destruct = av_destruct_packet;
2293     } else {
2294         opkt.data = pkt->data;
2295         opkt.size = pkt->size;
2296     }
2297     if (of->ctx->oformat->flags & AVFMT_RAWPICTURE) {
2298         /* store AVPicture in AVPacket, as expected by the output format */
2299         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
2300         opkt.data = (uint8_t *)&pict;
2301         opkt.size = sizeof(AVPicture);
2302         opkt.flags |= AV_PKT_FLAG_KEY;
2303     }
2304
2305     write_frame(of->ctx, &opkt, ost);
2306     ost->st->codec->frame_number++;
2307     av_free_packet(&opkt);
2308 }
2309
2310 static void rate_emu_sleep(InputStream *ist)
2311 {
2312     if (input_files[ist->file_index]->rate_emu) {
2313         int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
2314         int64_t now = av_gettime() - ist->start;
2315         if (pts > now)
2316             av_usleep(pts - now);
2317     }
2318 }
2319
2320 static int guess_input_channel_layout(InputStream *ist)
2321 {
2322     AVCodecContext *dec = ist->st->codec;
2323
2324     if (!dec->channel_layout) {
2325         char layout_name[256];
2326
2327         dec->channel_layout = av_get_default_channel_layout(dec->channels);
2328         if (!dec->channel_layout)
2329             return 0;
2330         av_get_channel_layout_string(layout_name, sizeof(layout_name),
2331                                      dec->channels, dec->channel_layout);
2332         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
2333                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
2334     }
2335     return 1;
2336 }
2337
2338 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
2339 {
2340     AVFrame *decoded_frame;
2341     AVCodecContext *avctx = ist->st->codec;
2342     int i, ret, resample_changed;
2343
2344     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2345         return AVERROR(ENOMEM);
2346     else
2347         avcodec_get_frame_defaults(ist->decoded_frame);
2348     decoded_frame = ist->decoded_frame;
2349
2350     update_benchmark(NULL);
2351     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
2352     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
2353     if (ret < 0) {
2354         return ret;
2355     }
2356     if (avctx->sample_rate <= 0) {
2357         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
2358         return AVERROR_INVALIDDATA;
2359     }
2360
2361     if (!*got_output) {
2362         /* no audio frame */
2363         if (!pkt->size)
2364             for (i = 0; i < ist->nb_filters; i++)
2365                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL,
2366                                      AV_BUFFERSRC_FLAG_NO_COPY);
2367         return ret;
2368     }
2369
2370     /* if the decoder provides a pts, use it instead of the last packet pts.
2371        the decoder could be delaying output by a packet or more. */
2372     if (decoded_frame->pts != AV_NOPTS_VALUE)
2373         ist->dts = ist->next_dts = ist->pts = ist->next_pts = decoded_frame->pts;
2374     else if (pkt->pts != AV_NOPTS_VALUE) {
2375         decoded_frame->pts = pkt->pts;
2376         pkt->pts           = AV_NOPTS_VALUE;
2377     }else
2378         decoded_frame->pts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
2379
2380
2381 #if 1
2382     /* increment next_dts to use for the case where the input stream does not
2383        have timestamps or there are multiple frames in the packet */
2384     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2385                      avctx->sample_rate;
2386     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2387                      avctx->sample_rate;
2388 #endif
2389
2390     rate_emu_sleep(ist);
2391
2392     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
2393                        ist->resample_channels       != avctx->channels               ||
2394                        ist->resample_channel_layout != decoded_frame->channel_layout ||
2395                        ist->resample_sample_rate    != decoded_frame->sample_rate;
2396     if (resample_changed) {
2397         char layout1[64], layout2[64];
2398
2399         if (!guess_input_channel_layout(ist)) {
2400             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
2401                    "layout for Input Stream #%d.%d\n", ist->file_index,
2402                    ist->st->index);
2403             exit_program(1);
2404         }
2405         decoded_frame->channel_layout = avctx->channel_layout;
2406
2407         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
2408                                      ist->resample_channel_layout);
2409         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
2410                                      decoded_frame->channel_layout);
2411
2412         av_log(NULL, AV_LOG_INFO,
2413                "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",
2414                ist->file_index, ist->st->index,
2415                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2416                ist->resample_channels, layout1,
2417                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2418                avctx->channels, layout2);
2419
2420         ist->resample_sample_fmt     = decoded_frame->format;
2421         ist->resample_sample_rate    = decoded_frame->sample_rate;
2422         ist->resample_channel_layout = decoded_frame->channel_layout;
2423         ist->resample_channels       = avctx->channels;
2424
2425         for (i = 0; i < nb_filtergraphs; i++)
2426             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2427                 configure_filtergraph(filtergraphs[i]) < 0) {
2428                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2429                 exit_program(1);
2430             }
2431     }
2432
2433     for (i = 0; i < ist->nb_filters; i++)
2434         av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, 0);
2435
2436     return ret;
2437 }
2438
2439 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
2440 {
2441     AVFrame *decoded_frame;
2442     void *buffer_to_free = NULL;
2443     int i, ret = 0, resample_changed;
2444     int64_t best_effort_timestamp;
2445     AVRational *frame_sample_aspect;
2446     float quality;
2447
2448     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2449         return AVERROR(ENOMEM);
2450     else
2451         avcodec_get_frame_defaults(ist->decoded_frame);
2452     decoded_frame = ist->decoded_frame;
2453     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
2454
2455     update_benchmark(NULL);
2456     ret = avcodec_decode_video2(ist->st->codec,
2457                                 decoded_frame, got_output, pkt);
2458     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
2459     if (ret < 0)
2460         return ret;
2461
2462     quality = same_quant ? decoded_frame->quality : 0;
2463     if (!*got_output) {
2464         /* no picture yet */
2465         if (!pkt->size)
2466             for (i = 0; i < ist->nb_filters; i++)
2467                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, AV_BUFFERSRC_FLAG_NO_COPY);
2468         return ret;
2469     }
2470
2471     if(ist->top_field_first>=0)
2472         decoded_frame->top_field_first = ist->top_field_first;
2473
2474     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
2475     if(best_effort_timestamp != AV_NOPTS_VALUE)
2476         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
2477
2478     pkt->size = 0;
2479     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2480
2481     rate_emu_sleep(ist);
2482
2483     if (ist->st->sample_aspect_ratio.num)
2484         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2485
2486     resample_changed = ist->resample_width   != decoded_frame->width  ||
2487                        ist->resample_height  != decoded_frame->height ||
2488                        ist->resample_pix_fmt != decoded_frame->format;
2489     if (resample_changed) {
2490         av_log(NULL, AV_LOG_INFO,
2491                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2492                ist->file_index, ist->st->index,
2493                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2494                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2495
2496         ist->resample_width   = decoded_frame->width;
2497         ist->resample_height  = decoded_frame->height;
2498         ist->resample_pix_fmt = decoded_frame->format;
2499
2500         for (i = 0; i < nb_filtergraphs; i++)
2501             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2502                 configure_filtergraph(filtergraphs[i]) < 0) {
2503                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2504                 exit_program(1);
2505             }
2506     }
2507
2508     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2509     for (i = 0; i < ist->nb_filters; i++) {
2510         int changed =      ist->st->codec->width   != ist->filters[i]->filter->outputs[0]->w
2511                         || ist->st->codec->height  != ist->filters[i]->filter->outputs[0]->h
2512                         || ist->st->codec->pix_fmt != ist->filters[i]->filter->outputs[0]->format;
2513         // XXX what an ugly hack
2514         if (ist->filters[i]->graph->nb_outputs == 1)
2515             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2516
2517         if (!frame_sample_aspect->num)
2518             *frame_sample_aspect = ist->st->sample_aspect_ratio;
2519         if (ist->dr1 && decoded_frame->type==FF_BUFFER_TYPE_USER && !changed) {
2520             FrameBuffer      *buf = decoded_frame->opaque;
2521             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2522                                         decoded_frame->data, decoded_frame->linesize,
2523                                         AV_PERM_READ | AV_PERM_PRESERVE,
2524                                         ist->st->codec->width, ist->st->codec->height,
2525                                         ist->st->codec->pix_fmt);
2526
2527             avfilter_copy_frame_props(fb, decoded_frame);
2528             fb->buf->priv           = buf;
2529             fb->buf->free           = filter_release_buffer;
2530
2531             av_assert0(buf->refcount>0);
2532             buf->refcount++;
2533             av_buffersrc_add_ref(ist->filters[i]->filter, fb,
2534                                  AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT |
2535                                  AV_BUFFERSRC_FLAG_NO_COPY);
2536         } else
2537         if(av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, 0)<0) {
2538             av_log(NULL, AV_LOG_FATAL, "Failed to inject frame into filter network\n");
2539             exit_program(1);
2540         }
2541
2542     }
2543
2544     av_free(buffer_to_free);
2545     return ret;
2546 }
2547
2548 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2549 {
2550     AVSubtitle subtitle;
2551     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2552                                           &subtitle, got_output, pkt);
2553     if (ret < 0)
2554         return ret;
2555     if (!*got_output)
2556         return ret;
2557
2558     rate_emu_sleep(ist);
2559
2560     for (i = 0; i < nb_output_streams; i++) {
2561         OutputStream *ost = output_streams[i];
2562
2563         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2564             continue;
2565
2566         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2567     }
2568
2569     avsubtitle_free(&subtitle);
2570     return ret;
2571 }
2572
2573 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2574 static int output_packet(InputStream *ist, const AVPacket *pkt)
2575 {
2576     int ret = 0, i;
2577     int got_output;
2578
2579     AVPacket avpkt;
2580     if (!ist->saw_first_ts) {
2581         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;
2582         ist->pts = 0;
2583         if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
2584             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2585             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
2586         }
2587         ist->saw_first_ts = 1;
2588     }
2589
2590     if (ist->next_dts == AV_NOPTS_VALUE)
2591         ist->next_dts = ist->dts;
2592     if (ist->next_pts == AV_NOPTS_VALUE)
2593         ist->next_pts = ist->pts;
2594
2595     if (pkt == NULL) {
2596         /* EOF handling */
2597         av_init_packet(&avpkt);
2598         avpkt.data = NULL;
2599         avpkt.size = 0;
2600         goto handle_eof;
2601     } else {
2602         avpkt = *pkt;
2603     }
2604
2605     if (pkt->dts != AV_NOPTS_VALUE) {
2606         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2607         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2608             ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2609     }
2610
2611     // while we have more to decode or while the decoder did output something on EOF
2612     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2613         int duration;
2614     handle_eof:
2615
2616         ist->pts = ist->next_pts;
2617         ist->dts = ist->next_dts;
2618
2619         if (avpkt.size && avpkt.size != pkt->size) {
2620             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2621                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2622             ist->showed_multi_packet_warning = 1;
2623         }
2624
2625         switch (ist->st->codec->codec_type) {
2626         case AVMEDIA_TYPE_AUDIO:
2627             ret = decode_audio    (ist, &avpkt, &got_output);
2628             break;
2629         case AVMEDIA_TYPE_VIDEO:
2630             ret = decode_video    (ist, &avpkt, &got_output);
2631             if (avpkt.duration) {
2632                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2633             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
2634                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
2635                 duration = ((int64_t)AV_TIME_BASE *
2636                                 ist->st->codec->time_base.num * ticks) /
2637                                 ist->st->codec->time_base.den;
2638             } else
2639                 duration = 0;
2640
2641             if(ist->dts != AV_NOPTS_VALUE && duration) {
2642                 ist->next_dts += duration;
2643             }else
2644                 ist->next_dts = AV_NOPTS_VALUE;
2645
2646             if (got_output)
2647                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
2648             break;
2649         case AVMEDIA_TYPE_SUBTITLE:
2650             ret = transcode_subtitles(ist, &avpkt, &got_output);
2651             break;
2652         default:
2653             return -1;
2654         }
2655
2656         if (ret < 0)
2657             return ret;
2658
2659         avpkt.dts=
2660         avpkt.pts= AV_NOPTS_VALUE;
2661
2662         // touch data and size only if not EOF
2663         if (pkt) {
2664             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
2665                 ret = avpkt.size;
2666             avpkt.data += ret;
2667             avpkt.size -= ret;
2668         }
2669         if (!got_output) {
2670             continue;
2671         }
2672     }
2673
2674     /* handle stream copy */
2675     if (!ist->decoding_needed) {
2676         rate_emu_sleep(ist);
2677         ist->dts = ist->next_dts;
2678         switch (ist->st->codec->codec_type) {
2679         case AVMEDIA_TYPE_AUDIO:
2680             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2681                              ist->st->codec->sample_rate;
2682             break;
2683         case AVMEDIA_TYPE_VIDEO:
2684             if (pkt->duration) {
2685                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2686             } else if(ist->st->codec->time_base.num != 0) {
2687                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2688                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2689                                   ist->st->codec->time_base.num * ticks) /
2690                                   ist->st->codec->time_base.den;
2691             }
2692             break;
2693         }
2694         ist->pts = ist->dts;
2695         ist->next_pts = ist->next_dts;
2696     }
2697     for (i = 0; pkt && i < nb_output_streams; i++) {
2698         OutputStream *ost = output_streams[i];
2699
2700         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2701             continue;
2702
2703         do_streamcopy(ist, ost, pkt);
2704     }
2705
2706     return 0;
2707 }
2708
2709 static void print_sdp(void)
2710 {
2711     char sdp[2048];
2712     int i;
2713     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2714
2715     if (!avc)
2716         exit_program(1);
2717     for (i = 0; i < nb_output_files; i++)
2718         avc[i] = output_files[i]->ctx;
2719
2720     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2721     printf("SDP:\n%s\n", sdp);
2722     fflush(stdout);
2723     av_freep(&avc);
2724 }
2725
2726 static int init_input_stream(int ist_index, char *error, int error_len)
2727 {
2728     InputStream *ist = input_streams[ist_index];
2729
2730     if (ist->decoding_needed) {
2731         AVCodec *codec = ist->dec;
2732         if (!codec) {
2733             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2734                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
2735             return AVERROR(EINVAL);
2736         }
2737
2738         ist->dr1 = (codec->capabilities & CODEC_CAP_DR1) && !do_deinterlace;
2739         if (codec->type == AVMEDIA_TYPE_VIDEO && ist->dr1) {
2740             ist->st->codec->get_buffer     = codec_get_buffer;
2741             ist->st->codec->release_buffer = codec_release_buffer;
2742             ist->st->codec->opaque         = &ist->buffer_pool;
2743         }
2744
2745         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2746             av_dict_set(&ist->opts, "threads", "auto", 0);
2747         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2748             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2749                     ist->file_index, ist->st->index);
2750             return AVERROR(EINVAL);
2751         }
2752         assert_codec_experimental(ist->st->codec, 0);
2753         assert_avoptions(ist->opts);
2754     }
2755
2756     ist->next_pts = AV_NOPTS_VALUE;
2757     ist->next_dts = AV_NOPTS_VALUE;
2758     ist->is_start = 1;
2759
2760     return 0;
2761 }
2762
2763 static InputStream *get_input_stream(OutputStream *ost)
2764 {
2765     if (ost->source_index >= 0)
2766         return input_streams[ost->source_index];
2767     return NULL;
2768 }
2769
2770 static void parse_forced_key_frames(char *kf, OutputStream *ost,
2771                                     AVCodecContext *avctx)
2772 {
2773     char *p;
2774     int n = 1, i;
2775     int64_t t;
2776
2777     for (p = kf; *p; p++)
2778         if (*p == ',')
2779             n++;
2780     ost->forced_kf_count = n;
2781     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
2782     if (!ost->forced_kf_pts) {
2783         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
2784         exit_program(1);
2785     }
2786     for (i = 0; i < n; i++) {
2787         p = i ? strchr(p, ',') + 1 : kf;
2788         t = parse_time_or_die("force_key_frames", p, 1);
2789         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2790     }
2791 }
2792
2793 static int transcode_init(void)
2794 {
2795     int ret = 0, i, j, k;
2796     AVFormatContext *oc;
2797     AVCodecContext *codec, *icodec = NULL;
2798     OutputStream *ost;
2799     InputStream *ist;
2800     char error[1024];
2801     int want_sdp = 1;
2802
2803     /* init framerate emulation */
2804     for (i = 0; i < nb_input_files; i++) {
2805         InputFile *ifile = input_files[i];
2806         if (ifile->rate_emu)
2807             for (j = 0; j < ifile->nb_streams; j++)
2808                 input_streams[j + ifile->ist_index]->start = av_gettime();
2809     }
2810
2811     /* output stream init */
2812     for (i = 0; i < nb_output_files; i++) {
2813         oc = output_files[i]->ctx;
2814         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2815             av_dump_format(oc, i, oc->filename, 1);
2816             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2817             return AVERROR(EINVAL);
2818         }
2819     }
2820
2821     /* init complex filtergraphs */
2822     for (i = 0; i < nb_filtergraphs; i++)
2823         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2824             return ret;
2825
2826     /* for each output stream, we compute the right encoding parameters */
2827     for (i = 0; i < nb_output_streams; i++) {
2828         ost = output_streams[i];
2829         oc  = output_files[ost->file_index]->ctx;
2830         ist = get_input_stream(ost);
2831
2832         if (ost->attachment_filename)
2833             continue;
2834
2835         codec  = ost->st->codec;
2836
2837         if (ist) {
2838             icodec = ist->st->codec;
2839
2840             ost->st->disposition          = ist->st->disposition;
2841             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2842             codec->chroma_sample_location = icodec->chroma_sample_location;
2843         }
2844
2845         if (ost->stream_copy) {
2846             uint64_t extra_size;
2847
2848             av_assert0(ist && !ost->filter);
2849
2850             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2851
2852             if (extra_size > INT_MAX) {
2853                 return AVERROR(EINVAL);
2854             }
2855
2856             /* if stream_copy is selected, no need to decode or encode */
2857             codec->codec_id   = icodec->codec_id;
2858             codec->codec_type = icodec->codec_type;
2859
2860             if (!codec->codec_tag) {
2861                 if (!oc->oformat->codec_tag ||
2862                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2863                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2864                     codec->codec_tag = icodec->codec_tag;
2865             }
2866
2867             codec->bit_rate       = icodec->bit_rate;
2868             codec->rc_max_rate    = icodec->rc_max_rate;
2869             codec->rc_buffer_size = icodec->rc_buffer_size;
2870             codec->field_order    = icodec->field_order;
2871             codec->extradata      = av_mallocz(extra_size);
2872             if (!codec->extradata) {
2873                 return AVERROR(ENOMEM);
2874             }
2875             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2876             codec->extradata_size= icodec->extradata_size;
2877             codec->bits_per_coded_sample  = icodec->bits_per_coded_sample;
2878
2879             codec->time_base = ist->st->time_base;
2880             /*
2881              * Avi is a special case here because it supports variable fps but
2882              * having the fps and timebase differe significantly adds quite some
2883              * overhead
2884              */
2885             if(!strcmp(oc->oformat->name, "avi")) {
2886                 if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2887                                  && av_q2d(ist->st->time_base) < 1.0/500
2888                     || copy_tb==0){
2889                     codec->time_base = icodec->time_base;
2890                     codec->time_base.num *= icodec->ticks_per_frame;
2891                     codec->time_base.den *= 2;
2892                     codec->ticks_per_frame = 2;
2893                 }
2894             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2895                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2896                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2897             ) {
2898                 if(   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
2899                                 && av_q2d(ist->st->time_base) < 1.0/500
2900                    || copy_tb==0){
2901                     codec->time_base = icodec->time_base;
2902                     codec->time_base.num *= icodec->ticks_per_frame;
2903                 }
2904             }
2905
2906             if(ost->frame_rate.num)
2907                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
2908
2909             av_reduce(&codec->time_base.num, &codec->time_base.den,
2910                         codec->time_base.num, codec->time_base.den, INT_MAX);
2911
2912             switch (codec->codec_type) {
2913             case AVMEDIA_TYPE_AUDIO:
2914                 if (audio_volume != 256) {
2915                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2916                     exit_program(1);
2917                 }
2918                 codec->channel_layout     = icodec->channel_layout;
2919                 codec->sample_rate        = icodec->sample_rate;
2920                 codec->channels           = icodec->channels;
2921                 codec->frame_size         = icodec->frame_size;
2922                 codec->audio_service_type = icodec->audio_service_type;
2923                 codec->block_align        = icodec->block_align;
2924                 if(codec->block_align == 1 && codec->codec_id == CODEC_ID_MP3)
2925                     codec->block_align= 0;
2926                 if(codec->codec_id == CODEC_ID_AC3)
2927                     codec->block_align= 0;
2928                 break;
2929             case AVMEDIA_TYPE_VIDEO:
2930                 codec->pix_fmt            = icodec->pix_fmt;
2931                 codec->width              = icodec->width;
2932                 codec->height             = icodec->height;
2933                 codec->has_b_frames       = icodec->has_b_frames;
2934                 if (!codec->sample_aspect_ratio.num) {
2935                     codec->sample_aspect_ratio   =
2936                     ost->st->sample_aspect_ratio =
2937                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2938                         ist->st->codec->sample_aspect_ratio.num ?
2939                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2940                 }
2941                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2942                 break;
2943             case AVMEDIA_TYPE_SUBTITLE:
2944                 codec->width  = icodec->width;
2945                 codec->height = icodec->height;
2946                 break;
2947             case AVMEDIA_TYPE_DATA:
2948             case AVMEDIA_TYPE_ATTACHMENT:
2949                 break;
2950             default:
2951                 abort();
2952             }
2953         } else {
2954             if (!ost->enc)
2955                 ost->enc = avcodec_find_encoder(codec->codec_id);
2956             if (!ost->enc) {
2957                 /* should only happen when a default codec is not present. */
2958                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
2959                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
2960                 ret = AVERROR(EINVAL);
2961                 goto dump_format;
2962             }
2963
2964             if (ist)
2965                 ist->decoding_needed = 1;
2966             ost->encoding_needed = 1;
2967
2968             if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2969                 if (ost->filter && !ost->frame_rate.num)
2970                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
2971                 if (ist && !ost->frame_rate.num)
2972                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
2973                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2974                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2975                     ost->frame_rate = ost->enc->supported_framerates[idx];
2976                 }
2977             }
2978
2979             if (!ost->filter &&
2980                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2981                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2982                     FilterGraph *fg;
2983                     fg = init_simple_filtergraph(ist, ost);
2984                     if (configure_filtergraph(fg)) {
2985                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2986                         exit(1);
2987                     }
2988             }
2989
2990             switch (codec->codec_type) {
2991             case AVMEDIA_TYPE_AUDIO:
2992                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2993                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2994                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2995                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
2996                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2997                 break;
2998             case AVMEDIA_TYPE_VIDEO:
2999                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
3000                 if (ost->filter && !(codec->time_base.num && codec->time_base.den))
3001                     codec->time_base = ost->filter->filter->inputs[0]->time_base;
3002                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
3003                    && (video_sync_method == VSYNC_CFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
3004                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
3005                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
3006                 }
3007                 for (j = 0; j < ost->forced_kf_count; j++)
3008                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
3009                                                          AV_TIME_BASE_Q,
3010                                                          codec->time_base);
3011
3012                 codec->width  = ost->filter->filter->inputs[0]->w;
3013                 codec->height = ost->filter->filter->inputs[0]->h;
3014                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
3015                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
3016                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
3017                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
3018                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
3019
3020                 if (!icodec ||
3021                     codec->width   != icodec->width  ||
3022                     codec->height  != icodec->height ||
3023                     codec->pix_fmt != icodec->pix_fmt) {
3024                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
3025                 }
3026
3027                 if (ost->forced_keyframes)
3028                     parse_forced_key_frames(ost->forced_keyframes, ost,
3029                                             ost->st->codec);
3030                 break;
3031             case AVMEDIA_TYPE_SUBTITLE:
3032                 codec->time_base = (AVRational){1, 1000};
3033                 break;
3034             default:
3035                 abort();
3036                 break;
3037             }
3038             /* two pass mode */
3039             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
3040                 char logfilename[1024];
3041                 FILE *f;
3042
3043                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
3044                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
3045                          i);
3046                 if (!strcmp(ost->enc->name, "libx264")) {
3047                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
3048                 } else {
3049                     if (codec->flags & CODEC_FLAG_PASS2) {
3050                         char  *logbuffer;
3051                         size_t logbuffer_size;
3052                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
3053                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
3054                                    logfilename);
3055                             exit_program(1);
3056                         }
3057                         codec->stats_in = logbuffer;
3058                     }
3059                     if (codec->flags & CODEC_FLAG_PASS1) {
3060                         f = fopen(logfilename, "wb");
3061                         if (!f) {
3062                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
3063                                 logfilename, strerror(errno));
3064                             exit_program(1);
3065                         }
3066                         ost->logfile = f;
3067                     }
3068                 }
3069             }
3070         }
3071     }
3072
3073     /* open each encoder */
3074     for (i = 0; i < nb_output_streams; i++) {
3075         ost = output_streams[i];
3076         if (ost->encoding_needed) {
3077             AVCodec      *codec = ost->enc;
3078             AVCodecContext *dec = NULL;
3079
3080             if ((ist = get_input_stream(ost)))
3081                 dec = ist->st->codec;
3082             if (dec && dec->subtitle_header) {
3083                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
3084                 if (!ost->st->codec->subtitle_header) {
3085                     ret = AVERROR(ENOMEM);
3086                     goto dump_format;
3087                 }
3088                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
3089                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
3090             }
3091             if (!av_dict_get(ost->opts, "threads", NULL, 0))
3092                 av_dict_set(&ost->opts, "threads", "auto", 0);
3093             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
3094                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
3095                         ost->file_index, ost->index);
3096                 ret = AVERROR(EINVAL);
3097                 goto dump_format;
3098             }
3099             assert_codec_experimental(ost->st->codec, 1);
3100             assert_avoptions(ost->opts);
3101             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
3102                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
3103                                              " It takes bits/s as argument, not kbits/s\n");
3104             extra_size += ost->st->codec->extradata_size;
3105
3106             if (ost->st->codec->me_threshold)
3107                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
3108         }
3109     }
3110
3111     /* init input streams */
3112     for (i = 0; i < nb_input_streams; i++)
3113         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
3114             goto dump_format;
3115
3116     /* discard unused programs */
3117     for (i = 0; i < nb_input_files; i++) {
3118         InputFile *ifile = input_files[i];
3119         for (j = 0; j < ifile->ctx->nb_programs; j++) {
3120             AVProgram *p = ifile->ctx->programs[j];
3121             int discard  = AVDISCARD_ALL;
3122
3123             for (k = 0; k < p->nb_stream_indexes; k++)
3124                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
3125                     discard = AVDISCARD_DEFAULT;
3126                     break;
3127                 }
3128             p->discard = discard;
3129         }
3130     }
3131
3132     /* open files and write file headers */
3133     for (i = 0; i < nb_output_files; i++) {
3134         oc = output_files[i]->ctx;
3135         oc->interrupt_callback = int_cb;
3136         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
3137             char errbuf[128];
3138             const char *errbuf_ptr = errbuf;
3139             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
3140                 errbuf_ptr = strerror(AVUNERROR(ret));
3141             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
3142             ret = AVERROR(EINVAL);
3143             goto dump_format;
3144         }
3145 //         assert_avoptions(output_files[i]->opts);
3146         if (strcmp(oc->oformat->name, "rtp")) {
3147             want_sdp = 0;
3148         }
3149     }
3150
3151  dump_format:
3152     /* dump the file output parameters - cannot be done before in case
3153        of stream copy */
3154     for (i = 0; i < nb_output_files; i++) {
3155         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
3156     }
3157
3158     /* dump the stream mapping */
3159     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
3160     for (i = 0; i < nb_input_streams; i++) {
3161         ist = input_streams[i];
3162
3163         for (j = 0; j < ist->nb_filters; j++) {
3164             if (ist->filters[j]->graph->graph_desc) {
3165                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
3166                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
3167                        ist->filters[j]->name);
3168                 if (nb_filtergraphs > 1)
3169                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
3170                 av_log(NULL, AV_LOG_INFO, "\n");
3171             }
3172         }
3173     }
3174
3175     for (i = 0; i < nb_output_streams; i++) {
3176         ost = output_streams[i];
3177
3178         if (ost->attachment_filename) {
3179             /* an attached file */
3180             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
3181                    ost->attachment_filename, ost->file_index, ost->index);
3182             continue;
3183         }
3184
3185         if (ost->filter && ost->filter->graph->graph_desc) {
3186             /* output from a complex graph */
3187             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
3188             if (nb_filtergraphs > 1)
3189                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
3190
3191             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
3192                    ost->index, ost->enc ? ost->enc->name : "?");
3193             continue;
3194         }
3195
3196         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
3197                input_streams[ost->source_index]->file_index,
3198                input_streams[ost->source_index]->st->index,
3199                ost->file_index,
3200                ost->index);
3201         if (ost->sync_ist != input_streams[ost->source_index])
3202             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
3203                    ost->sync_ist->file_index,
3204                    ost->sync_ist->st->index);
3205         if (ost->stream_copy)
3206             av_log(NULL, AV_LOG_INFO, " (copy)");
3207         else
3208             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
3209                    input_streams[ost->source_index]->dec->name : "?",
3210                    ost->enc ? ost->enc->name : "?");
3211         av_log(NULL, AV_LOG_INFO, "\n");
3212     }
3213
3214     if (ret) {
3215         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
3216         return ret;
3217     }
3218
3219     if (want_sdp) {
3220         print_sdp();
3221     }
3222
3223     return 0;
3224 }
3225
3226 /**
3227  * @return 1 if there are still streams where more output is wanted,
3228  *         0 otherwise
3229  */
3230 static int need_output(void)
3231 {
3232     int i;
3233
3234     for (i = 0; i < nb_output_streams; i++) {
3235         OutputStream *ost    = output_streams[i];
3236         OutputFile *of       = output_files[ost->file_index];
3237         AVFormatContext *os  = output_files[ost->file_index]->ctx;
3238
3239         if (ost->is_past_recording_time ||
3240             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3241             continue;
3242         if (ost->frame_number >= ost->max_frames) {
3243             int j;
3244             for (j = 0; j < of->ctx->nb_streams; j++)
3245                 output_streams[of->ost_index + j]->is_past_recording_time = 1;
3246             continue;
3247         }
3248
3249         return 1;
3250     }
3251
3252     return 0;
3253 }
3254
3255 static int select_input_file(uint8_t *no_packet)
3256 {
3257     int64_t ipts_min = INT64_MAX;
3258     int i, file_index = -1;
3259
3260     for (i = 0; i < nb_input_streams; i++) {
3261         InputStream *ist = input_streams[i];
3262         int64_t ipts     = ist->pts;
3263
3264         if (ist->discard || no_packet[ist->file_index])
3265             continue;
3266         if (!input_files[ist->file_index]->eof_reached) {
3267             if (ipts < ipts_min) {
3268                 ipts_min = ipts;
3269                 file_index = ist->file_index;
3270             }
3271         }
3272     }
3273
3274     return file_index;
3275 }
3276
3277 static int check_keyboard_interaction(int64_t cur_time)
3278 {
3279     int i, ret, key;
3280     static int64_t last_time;
3281     if (received_nb_signals)
3282         return AVERROR_EXIT;
3283     /* read_key() returns 0 on EOF */
3284     if(cur_time - last_time >= 100000 && !run_as_daemon){
3285         key =  read_key();
3286         last_time = cur_time;
3287     }else
3288         key = -1;
3289     if (key == 'q')
3290         return AVERROR_EXIT;
3291     if (key == '+') av_log_set_level(av_log_get_level()+10);
3292     if (key == '-') av_log_set_level(av_log_get_level()-10);
3293     if (key == 's') qp_hist     ^= 1;
3294     if (key == 'h'){
3295         if (do_hex_dump){
3296             do_hex_dump = do_pkt_dump = 0;
3297         } else if(do_pkt_dump){
3298             do_hex_dump = 1;
3299         } else
3300             do_pkt_dump = 1;
3301         av_log_set_level(AV_LOG_DEBUG);
3302     }
3303     if (key == 'c' || key == 'C'){
3304         char buf[4096], target[64], command[256], arg[256] = {0};
3305         double time;
3306         int k, n = 0;
3307         fprintf(stderr, "\nEnter command: <target> <time> <command>[ <argument>]\n");
3308         i = 0;
3309         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3310             if (k > 0)
3311                 buf[i++] = k;
3312         buf[i] = 0;
3313         if (k > 0 &&
3314             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
3315             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
3316                    target, time, command, arg);
3317             for (i = 0; i < nb_filtergraphs; i++) {
3318                 FilterGraph *fg = filtergraphs[i];
3319                 if (fg->graph) {
3320                     if (time < 0) {
3321                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
3322                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
3323                         fprintf(stderr, "Command reply for stream %d: ret:%d res:%s\n", i, ret, buf);
3324                     } else {
3325                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
3326                     }
3327                 }
3328             }
3329         } else {
3330             av_log(NULL, AV_LOG_ERROR,
3331                    "Parse error, at least 3 arguments were expected, "
3332                    "only %d given in string '%s'\n", n, buf);
3333         }
3334     }
3335     if (key == 'd' || key == 'D'){
3336         int debug=0;
3337         if(key == 'D') {
3338             debug = input_streams[0]->st->codec->debug<<1;
3339             if(!debug) debug = 1;
3340             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
3341                 debug += debug;
3342         }else
3343             if(scanf("%d", &debug)!=1)
3344                 fprintf(stderr,"error parsing debug value\n");
3345         for(i=0;i<nb_input_streams;i++) {
3346             input_streams[i]->st->codec->debug = debug;
3347         }
3348         for(i=0;i<nb_output_streams;i++) {
3349             OutputStream *ost = output_streams[i];
3350             ost->st->codec->debug = debug;
3351         }
3352         if(debug) av_log_set_level(AV_LOG_DEBUG);
3353         fprintf(stderr,"debug=%d\n", debug);
3354     }
3355     if (key == '?'){
3356         fprintf(stderr, "key    function\n"
3357                         "?      show this help\n"
3358                         "+      increase verbosity\n"
3359                         "-      decrease verbosity\n"
3360                         "c      Send command to filtergraph\n"
3361                         "D      cycle through available debug modes\n"
3362                         "h      dump packets/hex press to cycle through the 3 states\n"
3363                         "q      quit\n"
3364                         "s      Show QP histogram\n"
3365         );
3366     }
3367     return 0;
3368 }
3369
3370 #if HAVE_PTHREADS
3371 static void *input_thread(void *arg)
3372 {
3373     InputFile *f = arg;
3374     int ret = 0;
3375
3376     while (!transcoding_finished && ret >= 0) {
3377         AVPacket pkt;
3378         ret = av_read_frame(f->ctx, &pkt);
3379
3380         if (ret == AVERROR(EAGAIN)) {
3381             av_usleep(10000);
3382             ret = 0;
3383             continue;
3384         } else if (ret < 0)
3385             break;
3386
3387         pthread_mutex_lock(&f->fifo_lock);
3388         while (!av_fifo_space(f->fifo))
3389             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
3390
3391         av_dup_packet(&pkt);
3392         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
3393
3394         pthread_mutex_unlock(&f->fifo_lock);
3395     }
3396
3397     f->finished = 1;
3398     return NULL;
3399 }
3400
3401 static void free_input_threads(void)
3402 {
3403     int i;
3404
3405     if (nb_input_files == 1)
3406         return;
3407
3408     transcoding_finished = 1;
3409
3410     for (i = 0; i < nb_input_files; i++) {
3411         InputFile *f = input_files[i];
3412         AVPacket pkt;
3413
3414         if (!f->fifo || f->joined)
3415             continue;
3416
3417         pthread_mutex_lock(&f->fifo_lock);
3418         while (av_fifo_size(f->fifo)) {
3419             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
3420             av_free_packet(&pkt);
3421         }
3422         pthread_cond_signal(&f->fifo_cond);
3423         pthread_mutex_unlock(&f->fifo_lock);
3424
3425         pthread_join(f->thread, NULL);
3426         f->joined = 1;
3427
3428         while (av_fifo_size(f->fifo)) {
3429             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
3430             av_free_packet(&pkt);
3431         }
3432         av_fifo_free(f->fifo);
3433     }
3434 }
3435
3436 static int init_input_threads(void)
3437 {
3438     int i, ret;
3439
3440     if (nb_input_files == 1)
3441         return 0;
3442
3443     for (i = 0; i < nb_input_files; i++) {
3444         InputFile *f = input_files[i];
3445
3446         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
3447             return AVERROR(ENOMEM);
3448
3449         pthread_mutex_init(&f->fifo_lock, NULL);
3450         pthread_cond_init (&f->fifo_cond, NULL);
3451
3452         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
3453             return AVERROR(ret);
3454     }
3455     return 0;
3456 }
3457
3458 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
3459 {
3460     int ret = 0;
3461
3462     pthread_mutex_lock(&f->fifo_lock);
3463
3464     if (av_fifo_size(f->fifo)) {
3465         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
3466         pthread_cond_signal(&f->fifo_cond);
3467     } else {
3468         if (f->finished)
3469             ret = AVERROR_EOF;
3470         else
3471             ret = AVERROR(EAGAIN);
3472     }
3473
3474     pthread_mutex_unlock(&f->fifo_lock);
3475
3476     return ret;
3477 }
3478 #endif
3479
3480 static int get_input_packet(InputFile *f, AVPacket *pkt)
3481 {
3482 #if HAVE_PTHREADS
3483     if (nb_input_files > 1)
3484         return get_input_packet_mt(f, pkt);
3485 #endif
3486     return av_read_frame(f->ctx, pkt);
3487 }
3488
3489 /*
3490  * The following code is the main loop of the file converter
3491  */
3492 static int transcode(void)
3493 {
3494     int ret, i;
3495     AVFormatContext *is, *os;
3496     OutputStream *ost;
3497     InputStream *ist;
3498     uint8_t *no_packet;
3499     int no_packet_count = 0;
3500     int64_t timer_start;
3501
3502     if (!(no_packet = av_mallocz(nb_input_files)))
3503         exit_program(1);
3504
3505     ret = transcode_init();
3506     if (ret < 0)
3507         goto fail;
3508
3509     if (!using_stdin) {
3510         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
3511     }
3512
3513     timer_start = av_gettime();
3514
3515 #if HAVE_PTHREADS
3516     if ((ret = init_input_threads()) < 0)
3517         goto fail;
3518 #endif
3519
3520     for (; received_sigterm == 0;) {
3521         int file_index, ist_index;
3522         AVPacket pkt;
3523         int64_t cur_time= av_gettime();
3524
3525         /* if 'q' pressed, exits */
3526         if (!using_stdin)
3527             if (check_keyboard_interaction(cur_time) < 0)
3528                 break;
3529
3530         /* check if there's any stream where output is still needed */
3531         if (!need_output()) {
3532             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
3533             break;
3534         }
3535
3536         /* select the stream that we must read now */
3537         file_index = select_input_file(no_packet);
3538         /* if none, if is finished */
3539         if (file_index < 0) {
3540             if (no_packet_count) {
3541                 no_packet_count = 0;
3542                 memset(no_packet, 0, nb_input_files);
3543                 av_usleep(10000);
3544                 continue;
3545             }
3546             av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
3547             break;
3548         }
3549
3550         is  = input_files[file_index]->ctx;
3551         ret = get_input_packet(input_files[file_index], &pkt);
3552
3553         if (ret == AVERROR(EAGAIN)) {
3554             no_packet[file_index] = 1;
3555             no_packet_count++;
3556             continue;
3557         }
3558         if (ret < 0) {
3559             input_files[file_index]->eof_reached = 1;
3560
3561             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
3562                 ist = input_streams[input_files[file_index]->ist_index + i];
3563                 if (ist->decoding_needed)
3564                     output_packet(ist, NULL);
3565             }
3566
3567             if (opt_shortest)
3568                 break;
3569             else
3570                 continue;
3571         }
3572
3573         no_packet_count = 0;
3574         memset(no_packet, 0, nb_input_files);
3575
3576         if (do_pkt_dump) {
3577             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3578                              is->streams[pkt.stream_index]);
3579         }
3580         /* the following test is needed in case new streams appear
3581            dynamically in stream : we ignore them */
3582         if (pkt.stream_index >= input_files[file_index]->nb_streams)
3583             goto discard_packet;
3584         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
3585         ist = input_streams[ist_index];
3586         if (ist->discard)
3587             goto discard_packet;
3588
3589         if (pkt.dts != AV_NOPTS_VALUE)
3590             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3591         if (pkt.pts != AV_NOPTS_VALUE)
3592             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3593
3594         if (pkt.pts != AV_NOPTS_VALUE)
3595             pkt.pts *= ist->ts_scale;
3596         if (pkt.dts != AV_NOPTS_VALUE)
3597             pkt.dts *= ist->ts_scale;
3598
3599         if (debug_ts) {
3600             av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
3601                     "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",
3602                     ist_index, av_get_media_type_string(ist->st->codec->codec_type),
3603                     av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &ist->st->time_base),
3604                     av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &ist->st->time_base),
3605                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3606                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3607                     input_files[ist->file_index]->ts_offset);
3608         }
3609
3610         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE && !copy_ts) {
3611             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3612             int64_t delta   = pkt_dts - ist->next_dts;
3613             if (is->iformat->flags & AVFMT_TS_DISCONT) {
3614             if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3615                 (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3616                  ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3617                 pkt_dts+1<ist->pts){
3618                 input_files[ist->file_index]->ts_offset -= delta;
3619                 av_log(NULL, AV_LOG_DEBUG,
3620                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3621                        delta, input_files[ist->file_index]->ts_offset);
3622                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3623                 if (pkt.pts != AV_NOPTS_VALUE)
3624                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3625             }
3626             } else {
3627                 if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3628                     (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3629                      pkt_dts+1<ist->pts){
3630                     av_log(NULL, AV_LOG_WARNING, "DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n", pkt.dts, ist->next_dts, pkt.stream_index);
3631                     pkt.dts = AV_NOPTS_VALUE;
3632                 }
3633                 if (pkt.pts != AV_NOPTS_VALUE){
3634                     int64_t pkt_pts = av_rescale_q(pkt.pts, ist->st->time_base, AV_TIME_BASE_Q);
3635                     delta   = pkt_pts - ist->next_dts;
3636                     if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3637                         (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3638                         pkt_pts+1<ist->pts) {
3639                         av_log(NULL, AV_LOG_WARNING, "PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n", pkt.pts, ist->next_dts, pkt.stream_index);
3640                         pkt.pts = AV_NOPTS_VALUE;
3641                     }
3642                 }
3643             }
3644         }
3645
3646         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
3647         if ((ret = output_packet(ist, &pkt)) < 0 ||
3648             ((ret = poll_filters()) < 0 && ret != AVERROR_EOF)) {
3649             char buf[128];
3650             av_strerror(ret, buf, sizeof(buf));
3651             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d: %s\n",
3652                    ist->file_index, ist->st->index, buf);
3653             if (exit_on_error)
3654                 exit_program(1);
3655             av_free_packet(&pkt);
3656             continue;
3657         }
3658
3659     discard_packet:
3660         av_free_packet(&pkt);
3661
3662         /* dump report by using the output first video and audio streams */
3663         print_report(0, timer_start, cur_time);
3664     }
3665 #if HAVE_PTHREADS
3666     free_input_threads();
3667 #endif
3668
3669     /* at the end of stream, we must flush the decoder buffers */
3670     for (i = 0; i < nb_input_streams; i++) {
3671         ist = input_streams[i];
3672         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3673             output_packet(ist, NULL);
3674         }
3675     }
3676     poll_filters();
3677     flush_encoders();
3678
3679     term_exit();
3680
3681     /* write the trailer if needed and close file */
3682     for (i = 0; i < nb_output_files; i++) {
3683         os = output_files[i]->ctx;
3684         av_write_trailer(os);
3685     }
3686
3687     /* dump report by using the first video and audio streams */
3688     print_report(1, timer_start, av_gettime());
3689
3690     /* close each encoder */
3691     for (i = 0; i < nb_output_streams; i++) {
3692         ost = output_streams[i];
3693         if (ost->encoding_needed) {
3694             av_freep(&ost->st->codec->stats_in);
3695             avcodec_close(ost->st->codec);
3696         }
3697     }
3698
3699     /* close each decoder */
3700     for (i = 0; i < nb_input_streams; i++) {
3701         ist = input_streams[i];
3702         if (ist->decoding_needed) {
3703             avcodec_close(ist->st->codec);
3704         }
3705     }
3706
3707     /* finished ! */
3708     ret = 0;
3709
3710  fail:
3711     av_freep(&no_packet);
3712 #if HAVE_PTHREADS
3713     free_input_threads();
3714 #endif
3715
3716     if (output_streams) {
3717         for (i = 0; i < nb_output_streams; i++) {
3718             ost = output_streams[i];
3719             if (ost) {
3720                 if (ost->stream_copy)
3721                     av_freep(&ost->st->codec->extradata);
3722                 if (ost->logfile) {
3723                     fclose(ost->logfile);
3724                     ost->logfile = NULL;
3725                 }
3726                 av_freep(&ost->st->codec->subtitle_header);
3727                 av_free(ost->forced_kf_pts);
3728                 av_dict_free(&ost->opts);
3729             }
3730         }
3731     }
3732     return ret;
3733 }
3734
3735 static int opt_frame_crop(const char *opt, const char *arg)
3736 {
3737     av_log(NULL, AV_LOG_FATAL, "Option '%s' has been removed, use the crop filter instead\n", opt);
3738     return AVERROR(EINVAL);
3739 }
3740
3741 static int opt_pad(const char *opt, const char *arg)
3742 {
3743     av_log(NULL, AV_LOG_FATAL, "Option '%s' has been removed, use the pad filter instead\n", opt);
3744     return -1;
3745 }
3746
3747 static int opt_video_channel(const char *opt, const char *arg)
3748 {
3749     av_log(NULL, AV_LOG_WARNING, "This option is deprecated, use -channel.\n");
3750     return opt_default("channel", arg);
3751 }
3752
3753 static int opt_video_standard(const char *opt, const char *arg)
3754 {
3755     av_log(NULL, AV_LOG_WARNING, "This option is deprecated, use -standard.\n");
3756     return opt_default("standard", arg);
3757 }
3758
3759 static int opt_audio_codec(OptionsContext *o, const char *opt, const char *arg)
3760 {
3761     audio_codec_name = arg;
3762     return parse_option(o, "codec:a", arg, options);
3763 }
3764
3765 static int opt_video_codec(OptionsContext *o, const char *opt, const char *arg)
3766 {
3767     video_codec_name = arg;
3768     return parse_option(o, "codec:v", arg, options);
3769 }
3770
3771 static int opt_subtitle_codec(OptionsContext *o, const char *opt, const char *arg)
3772 {
3773     subtitle_codec_name = arg;
3774     return parse_option(o, "codec:s", arg, options);
3775 }
3776
3777 static int opt_data_codec(OptionsContext *o, const char *opt, const char *arg)
3778 {
3779     return parse_option(o, "codec:d", arg, options);
3780 }
3781
3782 static int opt_map(OptionsContext *o, const char *opt, const char *arg)
3783 {
3784     StreamMap *m = NULL;
3785     int i, negative = 0, file_idx;
3786     int sync_file_idx = -1, sync_stream_idx = 0;
3787     char *p, *sync;
3788     char *map;
3789
3790     if (*arg == '-') {
3791         negative = 1;
3792         arg++;
3793     }
3794     map = av_strdup(arg);
3795
3796     /* parse sync stream first, just pick first matching stream */
3797     if (sync = strchr(map, ',')) {
3798         *sync = 0;
3799         sync_file_idx = strtol(sync + 1, &sync, 0);
3800         if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
3801             av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
3802             exit_program(1);
3803         }
3804         if (*sync)
3805             sync++;
3806         for (i = 0; i < input_files[sync_file_idx]->nb_streams; i++)
3807             if (check_stream_specifier(input_files[sync_file_idx]->ctx,
3808                                        input_files[sync_file_idx]->ctx->streams[i], sync) == 1) {
3809                 sync_stream_idx = i;
3810                 break;
3811             }
3812         if (i == input_files[sync_file_idx]->nb_streams) {
3813             av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
3814                                        "match any streams.\n", arg);
3815             exit_program(1);
3816         }
3817     }
3818
3819
3820     if (map[0] == '[') {
3821         /* this mapping refers to lavfi output */
3822         const char *c = map + 1;
3823         o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3824                                     &o->nb_stream_maps, o->nb_stream_maps + 1);
3825         m = &o->stream_maps[o->nb_stream_maps - 1];
3826         m->linklabel = av_get_token(&c, "]");
3827         if (!m->linklabel) {
3828             av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
3829             exit_program(1);
3830         }
3831     } else {
3832         file_idx = strtol(map, &p, 0);
3833         if (file_idx >= nb_input_files || file_idx < 0) {
3834             av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
3835             exit_program(1);
3836         }
3837         if (negative)
3838             /* disable some already defined maps */
3839             for (i = 0; i < o->nb_stream_maps; i++) {
3840                 m = &o->stream_maps[i];
3841                 if (file_idx == m->file_index &&
3842                     check_stream_specifier(input_files[m->file_index]->ctx,
3843                                            input_files[m->file_index]->ctx->streams[m->stream_index],
3844                                            *p == ':' ? p + 1 : p) > 0)
3845                     m->disabled = 1;
3846             }
3847         else
3848             for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
3849                 if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
3850                             *p == ':' ? p + 1 : p) <= 0)
3851                     continue;
3852                 o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3853                                             &o->nb_stream_maps, o->nb_stream_maps + 1);
3854                 m = &o->stream_maps[o->nb_stream_maps - 1];
3855
3856                 m->file_index   = file_idx;
3857                 m->stream_index = i;
3858
3859                 if (sync_file_idx >= 0) {
3860                     m->sync_file_index   = sync_file_idx;
3861                     m->sync_stream_index = sync_stream_idx;
3862                 } else {
3863                     m->sync_file_index   = file_idx;
3864                     m->sync_stream_index = i;
3865                 }
3866             }
3867     }
3868
3869     if (!m) {
3870         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
3871         exit_program(1);
3872     }
3873
3874     av_freep(&map);
3875     return 0;
3876 }
3877
3878 static int opt_attach(OptionsContext *o, const char *opt, const char *arg)
3879 {
3880     o->attachments = grow_array(o->attachments, sizeof(*o->attachments),
3881                                 &o->nb_attachments, o->nb_attachments + 1);
3882     o->attachments[o->nb_attachments - 1] = arg;
3883     return 0;
3884 }
3885
3886 static int opt_map_channel(OptionsContext *o, const char *opt, const char *arg)
3887 {
3888     int n;
3889     AVStream *st;
3890     AudioChannelMap *m;
3891
3892     o->audio_channel_maps =
3893         grow_array(o->audio_channel_maps, sizeof(*o->audio_channel_maps),
3894                    &o->nb_audio_channel_maps, o->nb_audio_channel_maps + 1);
3895     m = &o->audio_channel_maps[o->nb_audio_channel_maps - 1];
3896
3897     /* muted channel syntax */
3898     n = sscanf(arg, "%d:%d.%d", &m->channel_idx, &m->ofile_idx, &m->ostream_idx);
3899     if ((n == 1 || n == 3) && m->channel_idx == -1) {
3900         m->file_idx = m->stream_idx = -1;
3901         if (n == 1)
3902             m->ofile_idx = m->ostream_idx = -1;
3903         return 0;
3904     }
3905
3906     /* normal syntax */
3907     n = sscanf(arg, "%d.%d.%d:%d.%d",
3908                &m->file_idx,  &m->stream_idx, &m->channel_idx,
3909                &m->ofile_idx, &m->ostream_idx);
3910
3911     if (n != 3 && n != 5) {
3912         av_log(NULL, AV_LOG_FATAL, "Syntax error, mapchan usage: "
3913                "[file.stream.channel|-1][:syncfile:syncstream]\n");
3914         exit_program(1);
3915     }
3916
3917     if (n != 5) // only file.stream.channel specified
3918         m->ofile_idx = m->ostream_idx = -1;
3919
3920     /* check input */
3921     if (m->file_idx < 0 || m->file_idx >= nb_input_files) {
3922         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid input file index: %d\n",
3923                m->file_idx);
3924         exit_program(1);
3925     }
3926     if (m->stream_idx < 0 ||
3927         m->stream_idx >= input_files[m->file_idx]->nb_streams) {
3928         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid input file stream index #%d.%d\n",
3929                m->file_idx, m->stream_idx);
3930         exit_program(1);
3931     }
3932     st = input_files[m->file_idx]->ctx->streams[m->stream_idx];
3933     if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
3934         av_log(NULL, AV_LOG_FATAL, "mapchan: stream #%d.%d is not an audio stream.\n",
3935                m->file_idx, m->stream_idx);
3936         exit_program(1);
3937     }
3938     if (m->channel_idx < 0 || m->channel_idx >= st->codec->channels) {
3939         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid audio channel #%d.%d.%d\n",
3940                m->file_idx, m->stream_idx, m->channel_idx);
3941         exit_program(1);
3942     }
3943     return 0;
3944 }
3945
3946 /**
3947  * Parse a metadata specifier in arg.
3948  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
3949  * @param index for type c/p, chapter/program index is written here
3950  * @param stream_spec for type s, the stream specifier is written here
3951  */
3952 static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
3953 {
3954     if (*arg) {
3955         *type = *arg;
3956         switch (*arg) {
3957         case 'g':
3958             break;
3959         case 's':
3960             if (*(++arg) && *arg != ':') {
3961                 av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
3962                 exit_program(1);
3963             }
3964             *stream_spec = *arg == ':' ? arg + 1 : "";
3965             break;
3966         case 'c':
3967         case 'p':
3968             if (*(++arg) == ':')
3969                 *index = strtol(++arg, NULL, 0);
3970             break;
3971         default:
3972             av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
3973             exit_program(1);
3974         }
3975     } else
3976         *type = 'g';
3977 }
3978
3979 static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
3980 {
3981     AVDictionary **meta_in = NULL;
3982     AVDictionary **meta_out = NULL;
3983     int i, ret = 0;
3984     char type_in, type_out;
3985     const char *istream_spec = NULL, *ostream_spec = NULL;
3986     int idx_in = 0, idx_out = 0;
3987
3988     parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
3989     parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
3990
3991     if (!ic) {
3992         if (type_out == 'g' || !*outspec)
3993             o->metadata_global_manual = 1;
3994         if (type_out == 's' || !*outspec)
3995             o->metadata_streams_manual = 1;
3996         if (type_out == 'c' || !*outspec)
3997             o->metadata_chapters_manual = 1;
3998         return 0;
3999     }
4000
4001     if (type_in == 'g' || type_out == 'g')
4002         o->metadata_global_manual = 1;
4003     if (type_in == 's' || type_out == 's')
4004         o->metadata_streams_manual = 1;
4005     if (type_in == 'c' || type_out == 'c')
4006         o->metadata_chapters_manual = 1;
4007
4008 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
4009     if ((index) < 0 || (index) >= (nb_elems)) {\
4010         av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
4011                 (desc), (index));\
4012         exit_program(1);\
4013     }
4014
4015 #define SET_DICT(type, meta, context, index)\
4016         switch (type) {\
4017         case 'g':\
4018             meta = &context->metadata;\
4019             break;\
4020         case 'c':\
4021             METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
4022             meta = &context->chapters[index]->metadata;\
4023             break;\
4024         case 'p':\
4025             METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
4026             meta = &context->programs[index]->metadata;\
4027             break;\
4028         default: av_assert0(0);\
4029         }\
4030
4031     SET_DICT(type_in, meta_in, ic, idx_in);
4032     SET_DICT(type_out, meta_out, oc, idx_out);
4033
4034     /* for input streams choose first matching stream */
4035     if (type_in == 's') {
4036         for (i = 0; i < ic->nb_streams; i++) {
4037             if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
4038                 meta_in = &ic->streams[i]->metadata;
4039                 break;
4040             } else if (ret < 0)
4041                 exit_program(1);
4042         }
4043         if (!meta_in) {
4044             av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
4045             exit_program(1);
4046         }
4047     }
4048
4049     if (type_out == 's') {
4050         for (i = 0; i < oc->nb_streams; i++) {
4051             if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
4052                 meta_out = &oc->streams[i]->metadata;
4053                 av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
4054             } else if (ret < 0)
4055                 exit_program(1);
4056         }
4057     } else
4058         av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
4059
4060     return 0;
4061 }
4062
4063 static int opt_recording_timestamp(OptionsContext *o, const char *opt, const char *arg)
4064 {
4065     char buf[128];
4066     int64_t recording_timestamp = parse_time_or_die(opt, arg, 0) / 1E6;
4067     struct tm time = *gmtime((time_t*)&recording_timestamp);
4068     strftime(buf, sizeof(buf), "creation_time=%FT%T%z", &time);
4069     parse_option(o, "metadata", buf, options);
4070
4071     av_log(NULL, AV_LOG_WARNING, "%s is deprecated, set the 'creation_time' metadata "
4072                                  "tag instead.\n", opt);
4073     return 0;
4074 }
4075
4076 static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
4077 {
4078     const char *codec_string = encoder ? "encoder" : "decoder";
4079     AVCodec *codec;
4080
4081     codec = encoder ?
4082         avcodec_find_encoder_by_name(name) :
4083         avcodec_find_decoder_by_name(name);
4084     if (!codec) {
4085         av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
4086         exit_program(1);
4087     }
4088     if (codec->type != type) {
4089         av_log(NULL, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
4090         exit_program(1);
4091     }
4092     return codec;
4093 }
4094
4095 static AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVStream *st)
4096 {
4097     char *codec_name = NULL;
4098
4099     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
4100     if (codec_name) {
4101         AVCodec *codec = find_codec_or_die(codec_name, st->codec->codec_type, 0);
4102         st->codec->codec_id = codec->id;
4103         return codec;
4104     } else
4105         return avcodec_find_decoder(st->codec->codec_id);
4106 }
4107
4108 /**
4109  * Add all the streams from the given input file to the global
4110  * list of input streams.
4111  */
4112 static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
4113 {
4114     int i;
4115     char *next, *codec_tag = NULL;
4116
4117     for (i = 0; i < ic->nb_streams; i++) {
4118         AVStream *st = ic->streams[i];
4119         AVCodecContext *dec = st->codec;
4120         InputStream *ist = av_mallocz(sizeof(*ist));
4121         char *framerate = NULL;
4122
4123         if (!ist)
4124             exit_program(1);
4125
4126         input_streams = grow_array(input_streams, sizeof(*input_streams), &nb_input_streams, nb_input_streams + 1);
4127         input_streams[nb_input_streams - 1] = ist;
4128
4129         ist->st = st;
4130         ist->file_index = nb_input_files;
4131         ist->discard = 1;
4132         st->discard  = AVDISCARD_ALL;
4133         ist->opts = filter_codec_opts(codec_opts, choose_decoder(o, ic, st), ic, st);
4134
4135         ist->ts_scale = 1.0;
4136         MATCH_PER_STREAM_OPT(ts_scale, dbl, ist->ts_scale, ic, st);
4137
4138         MATCH_PER_STREAM_OPT(codec_tags, str, codec_tag, ic, st);
4139         if (codec_tag) {
4140             uint32_t tag = strtol(codec_tag, &next, 0);
4141             if (*next)
4142                 tag = AV_RL32(codec_tag);
4143             st->codec->codec_tag = tag;
4144         }
4145
4146         ist->dec = choose_decoder(o, ic, st);
4147
4148         switch (dec->codec_type) {
4149         case AVMEDIA_TYPE_VIDEO:
4150             if(!ist->dec)
4151                 ist->dec = avcodec_find_decoder(dec->codec_id);
4152             if (dec->lowres) {
4153                 dec->flags |= CODEC_FLAG_EMU_EDGE;
4154             }
4155
4156             ist->resample_height  = dec->height;
4157             ist->resample_width   = dec->width;
4158             ist->resample_pix_fmt = dec->pix_fmt;
4159
4160             MATCH_PER_STREAM_OPT(frame_rates, str, framerate, ic, st);
4161             if (framerate && av_parse_video_rate(&ist->framerate,
4162                                                  framerate) < 0) {
4163                 av_log(NULL, AV_LOG_ERROR, "Error parsing framerate %s.\n",
4164                        framerate);
4165                 exit_program(1);
4166             }
4167
4168             ist->top_field_first = -1;
4169             MATCH_PER_STREAM_OPT(top_field_first, i, ist->top_field_first, ic, st);
4170
4171             break;
4172         case AVMEDIA_TYPE_AUDIO:
4173             guess_input_channel_layout(ist);
4174
4175             ist->resample_sample_fmt     = dec->sample_fmt;
4176             ist->resample_sample_rate    = dec->sample_rate;
4177             ist->resample_channels       = dec->channels;
4178             ist->resample_channel_layout = dec->channel_layout;
4179
4180             break;
4181         case AVMEDIA_TYPE_DATA:
4182         case AVMEDIA_TYPE_SUBTITLE:
4183             if(!ist->dec)
4184                 ist->dec = avcodec_find_decoder(dec->codec_id);
4185             break;
4186         case AVMEDIA_TYPE_ATTACHMENT:
4187         case AVMEDIA_TYPE_UNKNOWN:
4188             break;
4189         default:
4190             abort();
4191         }
4192     }
4193 }
4194
4195 static void assert_file_overwrite(const char *filename)
4196 {
4197     if ((!file_overwrite || no_file_overwrite) &&
4198         (strchr(filename, ':') == NULL || filename[1] == ':' ||
4199          av_strstart(filename, "file:", NULL))) {
4200         if (avio_check(filename, 0) == 0) {
4201             if (!using_stdin && (!no_file_overwrite || file_overwrite)) {
4202                 fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
4203                 fflush(stderr);
4204                 term_exit();
4205                 signal(SIGINT, SIG_DFL);
4206                 if (!read_yesno()) {
4207                     av_log(NULL, AV_LOG_FATAL, "Not overwriting - exiting\n");
4208                     exit_program(1);
4209                 }
4210                 term_init();
4211             }
4212             else {
4213                 av_log(NULL, AV_LOG_FATAL, "File '%s' already exists. Exiting.\n", filename);
4214                 exit_program(1);
4215             }
4216         }
4217     }
4218 }
4219
4220 static void dump_attachment(AVStream *st, const char *filename)
4221 {
4222     int ret;
4223     AVIOContext *out = NULL;
4224     AVDictionaryEntry *e;
4225
4226     if (!st->codec->extradata_size) {
4227         av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
4228                nb_input_files - 1, st->index);
4229         return;
4230     }
4231     if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
4232         filename = e->value;
4233     if (!*filename) {
4234         av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
4235                "in stream #%d:%d.\n", nb_input_files - 1, st->index);
4236         exit_program(1);
4237     }
4238
4239     assert_file_overwrite(filename);
4240
4241     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
4242         av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
4243                filename);
4244         exit_program(1);
4245     }
4246
4247     avio_write(out, st->codec->extradata, st->codec->extradata_size);
4248     avio_flush(out);
4249     avio_close(out);
4250 }
4251
4252 static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
4253 {
4254     AVFormatContext *ic;
4255     AVInputFormat *file_iformat = NULL;
4256     int err, i, ret;
4257     int64_t timestamp;
4258     uint8_t buf[128];
4259     AVDictionary **opts;
4260     int orig_nb_streams;                     // number of streams before avformat_find_stream_info
4261
4262     if (o->format) {
4263         if (!(file_iformat = av_find_input_format(o->format))) {
4264             av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
4265             exit_program(1);
4266         }
4267     }
4268
4269     if (!strcmp(filename, "-"))
4270         filename = "pipe:";
4271
4272     using_stdin |= !strncmp(filename, "pipe:", 5) ||
4273                     !strcmp(filename, "/dev/stdin");
4274
4275     /* get default parameters from command line */
4276     ic = avformat_alloc_context();
4277     if (!ic) {
4278         print_error(filename, AVERROR(ENOMEM));
4279         exit_program(1);
4280     }
4281     if (o->nb_audio_sample_rate) {
4282         snprintf(buf, sizeof(buf), "%d", o->audio_sample_rate[o->nb_audio_sample_rate - 1].u.i);
4283         av_dict_set(&format_opts, "sample_rate", buf, 0);
4284     }
4285     if (o->nb_audio_channels) {
4286         /* because we set audio_channels based on both the "ac" and