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