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 #if HAVE_PTHREADS
180 /* signal to input threads that they should exit; set by the main thread */
181 static int transcoding_finished;
182 #endif
183
184 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
185
186 typedef struct InputFilter {
187     AVFilterContext    *filter;
188     struct InputStream *ist;
189     struct FilterGraph *graph;
190     uint8_t            *name;
191 } InputFilter;
192
193 typedef struct OutputFilter {
194     AVFilterContext     *filter;
195     struct OutputStream *ost;
196     struct FilterGraph  *graph;
197     uint8_t             *name;
198
199     /* temporary storage until stream maps are processed */
200     AVFilterInOut       *out_tmp;
201 } OutputFilter;
202
203 typedef struct FilterGraph {
204     int            index;
205     const char    *graph_desc;
206
207     AVFilterGraph *graph;
208
209     InputFilter   **inputs;
210     int          nb_inputs;
211     OutputFilter **outputs;
212     int         nb_outputs;
213 } FilterGraph;
214
215 typedef struct InputStream {
216     int file_index;
217     AVStream *st;
218     int discard;             /* true if stream data should be discarded */
219     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
220     AVCodec *dec;
221     AVFrame *decoded_frame;
222
223     int64_t       start;     /* time when read started */
224     /* predicted dts of the next packet read for this stream or (when there are
225      * several frames in a packet) of the next frame in current packet */
226     int64_t       next_dts;
227     /* dts of the last packet read for this stream */
228     int64_t       dts;
229
230     int64_t       next_pts;  /* synthetic pts for the next decode frame */
231     int64_t       pts;       /* current pts of the decoded frame */
232     double ts_scale;
233     int is_start;            /* is 1 at the start and after a discontinuity */
234     int saw_first_ts;
235     int showed_multi_packet_warning;
236     AVDictionary *opts;
237     AVRational framerate;               /* framerate forced with -r */
238     int top_field_first;
239
240     int resample_height;
241     int resample_width;
242     int resample_pix_fmt;
243
244     int      resample_sample_fmt;
245     int      resample_sample_rate;
246     int      resample_channels;
247     uint64_t resample_channel_layout;
248
249     /* a pool of free buffers for decoded data */
250     FrameBuffer *buffer_pool;
251     int dr1;
252
253     /* decoded data from this stream goes into all those filters
254      * currently video and audio only */
255     InputFilter **filters;
256     int        nb_filters;
257 } InputStream;
258
259 typedef struct InputFile {
260     AVFormatContext *ctx;
261     int eof_reached;      /* true if eof reached */
262     int ist_index;        /* index of first stream in input_streams */
263     int64_t ts_offset;
264     int nb_streams;       /* number of stream that ffmpeg is aware of; may be different
265                              from ctx.nb_streams if new streams appear during av_read_frame() */
266     int rate_emu;
267
268 #if HAVE_PTHREADS
269     pthread_t thread;           /* thread reading from this file */
270     int finished;               /* the thread has exited */
271     int joined;                 /* the thread has been joined */
272     pthread_mutex_t fifo_lock;  /* lock for access to fifo */
273     pthread_cond_t  fifo_cond;  /* the main thread will signal on this cond after reading from fifo */
274     AVFifoBuffer *fifo;         /* demuxed packets are stored here; freed by the main thread */
275 #endif
276 } InputFile;
277
278 typedef struct OutputStream {
279     int file_index;          /* file index */
280     int index;               /* stream index in the output file */
281     int source_index;        /* InputStream index */
282     AVStream *st;            /* stream in the output file */
283     int encoding_needed;     /* true if encoding needed for this stream */
284     int frame_number;
285     /* input pts and corresponding output pts
286        for A/V sync */
287     struct InputStream *sync_ist; /* input stream to sync against */
288     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
289     /* pts of the first frame encoded for this stream, used for limiting
290      * recording time */
291     int64_t first_pts;
292     AVBitStreamFilterContext *bitstream_filters;
293     AVCodec *enc;
294     int64_t max_frames;
295     AVFrame *filtered_frame;
296
297     /* video only */
298     AVRational frame_rate;
299     int force_fps;
300     int top_field_first;
301
302     float frame_aspect_ratio;
303     float last_quality;
304
305     /* forced key frames */
306     int64_t *forced_kf_pts;
307     int forced_kf_count;
308     int forced_kf_index;
309
310     /* audio only */
311     int audio_channels_map[SWR_CH_MAX];  /* list of the channels id to pick from the source stream */
312     int audio_channels_mapped;           /* number of channels in audio_channels_map */
313
314     FILE *logfile;
315
316     OutputFilter *filter;
317     char *avfilter;
318
319     int64_t sws_flags;
320     int64_t swr_dither_method;
321     double swr_dither_scale;
322     AVDictionary *opts;
323     int is_past_recording_time;
324     int stream_copy;
325     const char *attachment_filename;
326     int copy_initial_nonkeyframes;
327
328     int keep_pix_fmt;
329 } OutputStream;
330
331
332 #if HAVE_TERMIOS_H
333
334 /* init terminal so that we can grab keys */
335 static struct termios oldtty;
336 static int restore_tty;
337 #endif
338
339 typedef struct OutputFile {
340     AVFormatContext *ctx;
341     AVDictionary *opts;
342     int ost_index;       /* index of the first stream in output_streams */
343     int64_t recording_time; /* desired length of the resulting file in microseconds */
344     int64_t start_time;     /* start time in microseconds */
345     uint64_t limit_filesize; /* filesize limit expressed in bytes */
346 } OutputFile;
347
348 static InputStream **input_streams = NULL;
349 static int        nb_input_streams = 0;
350 static InputFile   **input_files   = NULL;
351 static int        nb_input_files   = 0;
352
353 static OutputStream **output_streams = NULL;
354 static int         nb_output_streams = 0;
355 static OutputFile   **output_files   = NULL;
356 static int         nb_output_files   = 0;
357
358 static FilterGraph **filtergraphs;
359 int               nb_filtergraphs;
360
361 typedef struct OptionsContext {
362     /* input/output options */
363     int64_t start_time;
364     const char *format;
365
366     SpecifierOpt *codec_names;
367     int        nb_codec_names;
368     SpecifierOpt *audio_channels;
369     int        nb_audio_channels;
370     SpecifierOpt *audio_sample_rate;
371     int        nb_audio_sample_rate;
372     SpecifierOpt *frame_rates;
373     int        nb_frame_rates;
374     SpecifierOpt *frame_sizes;
375     int        nb_frame_sizes;
376     SpecifierOpt *frame_pix_fmts;
377     int        nb_frame_pix_fmts;
378
379     /* input options */
380     int64_t input_ts_offset;
381     int rate_emu;
382
383     SpecifierOpt *ts_scale;
384     int        nb_ts_scale;
385     SpecifierOpt *dump_attachment;
386     int        nb_dump_attachment;
387
388     /* output options */
389     StreamMap *stream_maps;
390     int     nb_stream_maps;
391     AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
392     int           nb_audio_channel_maps; /* number of (valid) -map_channel settings */
393     int metadata_global_manual;
394     int metadata_streams_manual;
395     int metadata_chapters_manual;
396     const char **attachments;
397     int       nb_attachments;
398
399     int chapters_input_file;
400
401     int64_t recording_time;
402     uint64_t limit_filesize;
403     float mux_preload;
404     float mux_max_delay;
405
406     int video_disable;
407     int audio_disable;
408     int subtitle_disable;
409     int data_disable;
410
411     /* indexed by output file stream index */
412     int   *streamid_map;
413     int nb_streamid_map;
414
415     SpecifierOpt *metadata;
416     int        nb_metadata;
417     SpecifierOpt *max_frames;
418     int        nb_max_frames;
419     SpecifierOpt *bitstream_filters;
420     int        nb_bitstream_filters;
421     SpecifierOpt *codec_tags;
422     int        nb_codec_tags;
423     SpecifierOpt *sample_fmts;
424     int        nb_sample_fmts;
425     SpecifierOpt *qscale;
426     int        nb_qscale;
427     SpecifierOpt *forced_key_frames;
428     int        nb_forced_key_frames;
429     SpecifierOpt *force_fps;
430     int        nb_force_fps;
431     SpecifierOpt *frame_aspect_ratios;
432     int        nb_frame_aspect_ratios;
433     SpecifierOpt *rc_overrides;
434     int        nb_rc_overrides;
435     SpecifierOpt *intra_matrices;
436     int        nb_intra_matrices;
437     SpecifierOpt *inter_matrices;
438     int        nb_inter_matrices;
439     SpecifierOpt *top_field_first;
440     int        nb_top_field_first;
441     SpecifierOpt *metadata_map;
442     int        nb_metadata_map;
443     SpecifierOpt *presets;
444     int        nb_presets;
445     SpecifierOpt *copy_initial_nonkeyframes;
446     int        nb_copy_initial_nonkeyframes;
447     SpecifierOpt *filters;
448     int        nb_filters;
449 } OptionsContext;
450
451 static void do_video_stats(AVFormatContext *os, OutputStream *ost, int frame_size);
452
453 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
454 {\
455     int i, ret;\
456     for (i = 0; i < o->nb_ ## name; i++) {\
457         char *spec = o->name[i].specifier;\
458         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
459             outvar = o->name[i].u.type;\
460         else if (ret < 0)\
461             exit_program(1);\
462     }\
463 }
464
465 static int64_t getutime(void)
466 {
467 #if HAVE_GETRUSAGE
468     struct rusage rusage;
469
470     getrusage(RUSAGE_SELF, &rusage);
471     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
472 #elif HAVE_GETPROCESSTIMES
473     HANDLE proc;
474     FILETIME c, e, k, u;
475     proc = GetCurrentProcess();
476     GetProcessTimes(proc, &c, &e, &k, &u);
477     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
478 #else
479     return av_gettime();
480 #endif
481 }
482
483 static void update_benchmark(const char *fmt, ...)
484 {
485     if (do_benchmark_all) {
486         int64_t t = getutime();
487         va_list va;
488         char buf[1024];
489
490         if (fmt) {
491             va_start(va, fmt);
492             vsnprintf(buf, sizeof(buf), fmt, va);
493             va_end(va);
494             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
495         }
496         current_time = t;
497     }
498 }
499
500 static void reset_options(OptionsContext *o, int is_input)
501 {
502     const OptionDef *po = options;
503     OptionsContext bak= *o;
504     int i;
505
506     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
507     while (po->name) {
508         void *dst = (uint8_t*)o + po->u.off;
509
510         if (po->flags & OPT_SPEC) {
511             SpecifierOpt **so = dst;
512             int i, *count = (int*)(so + 1);
513             for (i = 0; i < *count; i++) {
514                 av_freep(&(*so)[i].specifier);
515                 if (po->flags & OPT_STRING)
516                     av_freep(&(*so)[i].u.str);
517             }
518             av_freep(so);
519             *count = 0;
520         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
521             av_freep(dst);
522         po++;
523     }
524
525     for (i = 0; i < o->nb_stream_maps; i++)
526         av_freep(&o->stream_maps[i].linklabel);
527     av_freep(&o->stream_maps);
528     av_freep(&o->audio_channel_maps);
529     av_freep(&o->streamid_map);
530
531     memset(o, 0, sizeof(*o));
532
533     if(is_input) o->recording_time = bak.recording_time;
534     else         o->recording_time = INT64_MAX;
535     o->mux_max_delay  = 0.7;
536     o->limit_filesize = UINT64_MAX;
537     o->chapters_input_file = INT_MAX;
538
539     uninit_opts();
540     init_opts();
541 }
542
543 static enum PixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum PixelFormat target)
544 {
545     if (codec && codec->pix_fmts) {
546         const enum PixelFormat *p = codec->pix_fmts;
547         int has_alpha= av_pix_fmt_descriptors[target].nb_components % 2 == 0;
548         enum PixelFormat best= PIX_FMT_NONE;
549         if (st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
550             if (st->codec->codec_id == CODEC_ID_MJPEG) {
551                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
552             } else if (st->codec->codec_id == CODEC_ID_LJPEG) {
553                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
554                                                  PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
555             }
556         }
557         for (; *p != PIX_FMT_NONE; p++) {
558             best= avcodec_find_best_pix_fmt2(best, *p, target, has_alpha, NULL);
559             if (*p == target)
560                 break;
561         }
562         if (*p == PIX_FMT_NONE) {
563             if (target != PIX_FMT_NONE)
564                 av_log(NULL, AV_LOG_WARNING,
565                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
566                        av_pix_fmt_descriptors[target].name,
567                        codec->name,
568                        av_pix_fmt_descriptors[best].name);
569             return best;
570         }
571     }
572     return target;
573 }
574
575 static char *choose_pix_fmts(OutputStream *ost)
576 {
577      if (ost->keep_pix_fmt) {
578         if (ost->filter)
579             avfilter_graph_set_auto_convert(ost->filter->graph->graph,
580                                             AVFILTER_AUTO_CONVERT_NONE);
581         if (ost->st->codec->pix_fmt == PIX_FMT_NONE)
582             return NULL;
583         return av_strdup(av_get_pix_fmt_name(ost->st->codec->pix_fmt));
584     }
585     if (ost->st->codec->pix_fmt != PIX_FMT_NONE) {
586         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc, ost->st->codec->pix_fmt)));
587     } else if (ost->enc && ost->enc->pix_fmts) {
588         const enum PixelFormat *p;
589         AVIOContext *s = NULL;
590         uint8_t *ret;
591         int len;
592
593         if (avio_open_dyn_buf(&s) < 0)
594             exit_program(1);
595
596         p = ost->enc->pix_fmts;
597         if (ost->st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
598             if (ost->st->codec->codec_id == CODEC_ID_MJPEG) {
599                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
600             } else if (ost->st->codec->codec_id == CODEC_ID_LJPEG) {
601                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
602                                                     PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
603             }
604         }
605
606         for (; *p != PIX_FMT_NONE; p++) {
607             const char *name = av_get_pix_fmt_name(*p);
608             avio_printf(s, "%s:", name);
609         }
610         len = avio_close_dyn_buf(s, &ret);
611         ret[len - 1] = 0;
612         return ret;
613     } else
614         return NULL;
615 }
616
617 /**
618  * Define a function for building a string containing a list of
619  * allowed formats,
620  */
621 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator) \
622 static char *choose_ ## var ## s(OutputStream *ost)                             \
623 {                                                                               \
624     if (ost->st->codec->var != none) {                                          \
625         get_name(ost->st->codec->var);                                          \
626         return av_strdup(name);                                                 \
627     } else if (ost->enc->supported_list) {                                      \
628         const type *p;                                                          \
629         AVIOContext *s = NULL;                                                  \
630         uint8_t *ret;                                                           \
631         int len;                                                                \
632                                                                                 \
633         if (avio_open_dyn_buf(&s) < 0)                                          \
634             exit_program(1);                                                    \
635                                                                                 \
636         for (p = ost->enc->supported_list; *p != none; p++) {                   \
637             get_name(*p);                                                       \
638             avio_printf(s, "%s" separator, name);                               \
639         }                                                                       \
640         len = avio_close_dyn_buf(s, &ret);                                      \
641         ret[len - 1] = 0;                                                       \
642         return ret;                                                             \
643     } else                                                                      \
644         return NULL;                                                            \
645 }
646
647 #define GET_PIX_FMT_NAME(pix_fmt)\
648     const char *name = av_get_pix_fmt_name(pix_fmt);
649
650 // DEF_CHOOSE_FORMAT(enum PixelFormat, pix_fmt, pix_fmts, PIX_FMT_NONE,
651 //                   GET_PIX_FMT_NAME, ":")
652
653 #define GET_SAMPLE_FMT_NAME(sample_fmt)\
654     const char *name = av_get_sample_fmt_name(sample_fmt)
655
656 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
657                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME, ",")
658
659 #define GET_SAMPLE_RATE_NAME(rate)\
660     char name[16];\
661     snprintf(name, sizeof(name), "%d", rate);
662
663 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
664                   GET_SAMPLE_RATE_NAME, ",")
665
666 #define GET_CH_LAYOUT_NAME(ch_layout)\
667     char name[16];\
668     snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
669
670 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
671                   GET_CH_LAYOUT_NAME, ",")
672
673 static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
674 {
675     FilterGraph *fg = av_mallocz(sizeof(*fg));
676
677     if (!fg)
678         exit_program(1);
679     fg->index = nb_filtergraphs;
680
681     fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
682                              fg->nb_outputs + 1);
683     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
684         exit_program(1);
685     fg->outputs[0]->ost   = ost;
686     fg->outputs[0]->graph = fg;
687
688     ost->filter = fg->outputs[0];
689
690     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
691                             fg->nb_inputs + 1);
692     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
693         exit_program(1);
694     fg->inputs[0]->ist   = ist;
695     fg->inputs[0]->graph = fg;
696
697     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
698                               &ist->nb_filters, ist->nb_filters + 1);
699     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
700
701     filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
702                               &nb_filtergraphs, nb_filtergraphs + 1);
703     filtergraphs[nb_filtergraphs - 1] = fg;
704
705     return fg;
706 }
707
708 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
709 {
710     InputStream *ist = NULL;
711     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
712     int i;
713
714     // TODO: support other filter types
715     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
716         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
717                "currently.\n");
718         exit_program(1);
719     }
720
721     if (in->name) {
722         AVFormatContext *s;
723         AVStream       *st = NULL;
724         char *p;
725         int file_idx = strtol(in->name, &p, 0);
726
727         if (file_idx < 0 || file_idx >= nb_input_files) {
728             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
729                    file_idx, fg->graph_desc);
730             exit_program(1);
731         }
732         s = input_files[file_idx]->ctx;
733
734         for (i = 0; i < s->nb_streams; i++) {
735             if (s->streams[i]->codec->codec_type != type)
736                 continue;
737             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
738                 st = s->streams[i];
739                 break;
740             }
741         }
742         if (!st) {
743             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
744                    "matches no streams.\n", p, fg->graph_desc);
745             exit_program(1);
746         }
747         ist = input_streams[input_files[file_idx]->ist_index + st->index];
748     } else {
749         /* find the first unused stream of corresponding type */
750         for (i = 0; i < nb_input_streams; i++) {
751             ist = input_streams[i];
752             if (ist->st->codec->codec_type == type && ist->discard)
753                 break;
754         }
755         if (i == nb_input_streams) {
756             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
757                    "unlabeled input pad %d on filter %s\n", in->pad_idx,
758                    in->filter_ctx->name);
759             exit_program(1);
760         }
761     }
762     ist->discard         = 0;
763     ist->decoding_needed = 1;
764     ist->st->discard = AVDISCARD_NONE;
765
766     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
767                             &fg->nb_inputs, fg->nb_inputs + 1);
768     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
769         exit_program(1);
770     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
771     fg->inputs[fg->nb_inputs - 1]->graph = fg;
772
773     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
774                               &ist->nb_filters, ist->nb_filters + 1);
775     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
776 }
777
778 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
779 {
780     char *pix_fmts;
781     OutputStream *ost = ofilter->ost;
782     AVCodecContext *codec = ost->st->codec;
783     AVFilterContext *last_filter = out->filter_ctx;
784     int pad_idx = out->pad_idx;
785     int ret;
786     char name[255];
787     AVBufferSinkParams *buffersink_params = av_buffersink_params_alloc();
788
789     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
790     ret = avfilter_graph_create_filter(&ofilter->filter,
791                                        avfilter_get_by_name("buffersink"),
792                                        name, NULL, NULL/*buffersink_params*/, fg->graph);
793     av_freep(&buffersink_params);
794
795     if (ret < 0)
796         return ret;
797
798     if (codec->width || codec->height) {
799         char args[255];
800         AVFilterContext *filter;
801
802         snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
803                  codec->width,
804                  codec->height,
805                  (unsigned)ost->sws_flags);
806         snprintf(name, sizeof(name), "scaler for output stream %d:%d",
807                  ost->file_index, ost->index);
808         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
809                                                 name, args, NULL, fg->graph)) < 0)
810             return ret;
811         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
812             return ret;
813
814         last_filter = filter;
815         pad_idx = 0;
816     }
817
818     if ((pix_fmts = choose_pix_fmts(ost))) {
819         AVFilterContext *filter;
820         snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
821                  ost->file_index, ost->index);
822         if ((ret = avfilter_graph_create_filter(&filter,
823                                                 avfilter_get_by_name("format"),
824                                                 "format", pix_fmts, NULL,
825                                                 fg->graph)) < 0)
826             return ret;
827         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
828             return ret;
829
830         last_filter = filter;
831         pad_idx     = 0;
832         av_freep(&pix_fmts);
833     }
834
835     if (ost->frame_rate.num && 0) {
836         AVFilterContext *fps;
837         char args[255];
838
839         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
840                  ost->frame_rate.den);
841         snprintf(name, sizeof(name), "fps for output stream %d:%d",
842                  ost->file_index, ost->index);
843         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
844                                            name, args, NULL, fg->graph);
845         if (ret < 0)
846             return ret;
847
848         ret = avfilter_link(last_filter, pad_idx, fps, 0);
849         if (ret < 0)
850             return ret;
851         last_filter = fps;
852         pad_idx = 0;
853     }
854
855     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
856         return ret;
857
858     return 0;
859 }
860
861 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
862 {
863     OutputStream *ost = ofilter->ost;
864     AVCodecContext *codec  = ost->st->codec;
865     AVFilterContext *last_filter = out->filter_ctx;
866     int pad_idx = out->pad_idx;
867     char *sample_fmts, *sample_rates, *channel_layouts;
868     char name[255];
869     int ret;
870
871
872     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
873     ret = avfilter_graph_create_filter(&ofilter->filter,
874                                        avfilter_get_by_name("abuffersink_old"),
875                                        name, NULL, NULL, fg->graph);
876     if (ret < 0)
877         return ret;
878
879 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
880     AVFilterContext *filt_ctx;                                              \
881                                                                             \
882     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
883            "similarly to -af " filter_name "=%s.\n", arg);                  \
884                                                                             \
885     ret = avfilter_graph_create_filter(&filt_ctx,                           \
886                                        avfilter_get_by_name(filter_name),   \
887                                        filter_name, arg, NULL, fg->graph);  \
888     if (ret < 0)                                                            \
889         return ret;                                                         \
890                                                                             \
891     ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0);                 \
892     if (ret < 0)                                                            \
893         return ret;                                                         \
894                                                                             \
895     last_filter = filt_ctx;                                                 \
896     pad_idx = 0;                                                            \
897 } while (0)
898     if (ost->audio_channels_mapped) {
899         int i;
900         AVBPrint pan_buf;
901         av_bprint_init(&pan_buf, 256, 8192);
902         av_bprintf(&pan_buf, "0x%"PRIx64,
903                    av_get_default_channel_layout(ost->audio_channels_mapped));
904         for (i = 0; i < ost->audio_channels_mapped; i++)
905             if (ost->audio_channels_map[i] != -1)
906                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
907
908         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
909         av_bprint_finalize(&pan_buf, NULL);
910     }
911
912     if (codec->channels && !codec->channel_layout)
913         codec->channel_layout = av_get_default_channel_layout(codec->channels);
914
915     sample_fmts     = choose_sample_fmts(ost);
916     sample_rates    = choose_sample_rates(ost);
917     channel_layouts = choose_channel_layouts(ost);
918     if (sample_fmts || sample_rates || channel_layouts) {
919         AVFilterContext *format;
920         char args[256];
921         int len = 0;
922
923         if (sample_fmts)
924             len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
925                             sample_fmts);
926         if (sample_rates)
927             len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
928                             sample_rates);
929         if (channel_layouts)
930             len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
931                             channel_layouts);
932         args[len - 1] = 0;
933
934         av_freep(&sample_fmts);
935         av_freep(&sample_rates);
936         av_freep(&channel_layouts);
937
938         snprintf(name, sizeof(name), "audio format for output stream %d:%d",
939                  ost->file_index, ost->index);
940         ret = avfilter_graph_create_filter(&format,
941                                            avfilter_get_by_name("aformat"),
942                                            name, args, NULL, fg->graph);
943         if (ret < 0)
944             return ret;
945
946         ret = avfilter_link(last_filter, pad_idx, format, 0);
947         if (ret < 0)
948             return ret;
949
950         last_filter = format;
951         pad_idx = 0;
952     }
953
954     if (audio_volume != 256 && 0) {
955         char args[256];
956
957         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
958         AUTO_INSERT_FILTER("-vol", "volume", args);
959     }
960
961     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
962         return ret;
963
964     return 0;
965 }
966
967 #define DESCRIBE_FILTER_LINK(f, inout, in)                         \
968 {                                                                  \
969     AVFilterContext *ctx = inout->filter_ctx;                      \
970     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;  \
971     int       nb_pads = in ? ctx->input_count : ctx->output_count; \
972     AVIOContext *pb;                                               \
973                                                                    \
974     if (avio_open_dyn_buf(&pb) < 0)                                \
975         exit_program(1);                                           \
976                                                                    \
977     avio_printf(pb, "%s", ctx->filter->name);                      \
978     if (nb_pads > 1)                                               \
979         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
980     avio_w8(pb, 0);                                                \
981     avio_close_dyn_buf(pb, &f->name);                              \
982 }
983
984 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
985 {
986     av_freep(&ofilter->name);
987     DESCRIBE_FILTER_LINK(ofilter, out, 0);
988
989     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
990     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
991     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
992     default: av_assert0(0);
993     }
994 }
995
996 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
997                                         AVFilterInOut *in)
998 {
999     AVFilterContext *first_filter = in->filter_ctx;
1000     AVFilter *filter = avfilter_get_by_name("buffer");
1001     InputStream *ist = ifilter->ist;
1002     AVRational tb = ist->framerate.num ? (AVRational){ist->framerate.den,
1003                                                       ist->framerate.num} :
1004                                          ist->st->time_base;
1005     AVRational fr = ist->framerate.num ? ist->framerate :
1006                                          ist->st->r_frame_rate;
1007     AVRational sar;
1008     AVBPrint args;
1009     char name[255];
1010     int pad_idx = in->pad_idx;
1011     int ret;
1012
1013     sar = ist->st->sample_aspect_ratio.num ?
1014           ist->st->sample_aspect_ratio :
1015           ist->st->codec->sample_aspect_ratio;
1016     if(!sar.den)
1017         sar = (AVRational){0,1};
1018     av_bprint_init(&args, 0, 1);
1019     av_bprintf(&args,
1020              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
1021              "pixel_aspect=%d/%d:sws_param=flags=%d", ist->st->codec->width,
1022              ist->st->codec->height, ist->st->codec->pix_fmt,
1023              tb.num, tb.den, sar.num, sar.den,
1024              SWS_BILINEAR + ((ist->st->codec->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
1025     if (fr.num && fr.den)
1026         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
1027     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
1028              ist->file_index, ist->st->index);
1029
1030     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, name,
1031                                             args.str, NULL, fg->graph)) < 0)
1032         return ret;
1033
1034     if (ist->framerate.num) {
1035         AVFilterContext *setpts;
1036
1037         snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
1038                  ist->file_index, ist->st->index);
1039         if ((ret = avfilter_graph_create_filter(&setpts,
1040                                                 avfilter_get_by_name("setpts"),
1041                                                 name, "N", NULL,
1042                                                 fg->graph)) < 0)
1043             return ret;
1044
1045         if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0)
1046             return ret;
1047
1048         first_filter = setpts;
1049         pad_idx = 0;
1050     }
1051
1052     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
1053         return ret;
1054     return 0;
1055 }
1056
1057 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
1058                                         AVFilterInOut *in)
1059 {
1060     AVFilterContext *first_filter = in->filter_ctx;
1061     AVFilter *filter = avfilter_get_by_name("abuffer");
1062     InputStream *ist = ifilter->ist;
1063     int pad_idx = in->pad_idx;
1064     char args[255], name[255];
1065     int ret;
1066
1067     snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s"
1068              ":channel_layout=0x%"PRIx64,
1069              ist->st->time_base.num, ist->st->time_base.den,
1070              ist->st->codec->sample_rate,
1071              av_get_sample_fmt_name(ist->st->codec->sample_fmt),
1072              ist->st->codec->channel_layout);
1073     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
1074              ist->file_index, ist->st->index);
1075
1076     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter,
1077                                             name, args, NULL,
1078                                             fg->graph)) < 0)
1079         return ret;
1080
1081 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do {                 \
1082     AVFilterContext *filt_ctx;                                              \
1083                                                                             \
1084     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
1085            "similarly to -af " filter_name "=%s.\n", arg);                  \
1086                                                                             \
1087     snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d",      \
1088                 fg->index, filter_name, ist->file_index, ist->st->index);   \
1089     ret = avfilter_graph_create_filter(&filt_ctx,                           \
1090                                        avfilter_get_by_name(filter_name),   \
1091                                        name, arg, NULL, fg->graph);         \
1092     if (ret < 0)                                                            \
1093         return ret;                                                         \
1094                                                                             \
1095     ret = avfilter_link(filt_ctx, 0, first_filter, pad_idx);                \
1096     if (ret < 0)                                                            \
1097         return ret;                                                         \
1098                                                                             \
1099     first_filter = filt_ctx;                                                  \
1100 } while (0)
1101
1102     if (audio_sync_method > 0) {
1103         char args[256] = {0};
1104
1105         av_strlcatf(args, sizeof(args), "min_comp=0.001:min_hard_comp=%f", audio_drift_threshold);
1106         if (audio_sync_method > 1)
1107             av_strlcatf(args, sizeof(args), ":max_soft_comp=%f", audio_sync_method/(double)ist->st->codec->sample_rate);
1108         AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
1109     }
1110
1111 //     if (ost->audio_channels_mapped) {
1112 //         int i;
1113 //         AVBPrint pan_buf;
1114 //         av_bprint_init(&pan_buf, 256, 8192);
1115 //         av_bprintf(&pan_buf, "0x%"PRIx64,
1116 //                    av_get_default_channel_layout(ost->audio_channels_mapped));
1117 //         for (i = 0; i < ost->audio_channels_mapped; i++)
1118 //             if (ost->audio_channels_map[i] != -1)
1119 //                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
1120 //         AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
1121 //         av_bprint_finalize(&pan_buf, NULL);
1122 //     }
1123
1124     if (audio_volume != 256) {
1125         char args[256];
1126
1127         snprintf(args, sizeof(args), "%f", audio_volume / 256.);
1128         AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
1129     }
1130     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
1131         return ret;
1132
1133     return 0;
1134 }
1135
1136 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
1137                                   AVFilterInOut *in)
1138 {
1139     av_freep(&ifilter->name);
1140     DESCRIBE_FILTER_LINK(ifilter, in, 1);
1141
1142     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
1143     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
1144     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
1145     default: av_assert0(0);
1146     }
1147 }
1148
1149 static int configure_filtergraph(FilterGraph *fg)
1150 {
1151     AVFilterInOut *inputs, *outputs, *cur;
1152     int ret, i, init = !fg->graph, simple = !fg->graph_desc;
1153     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1154                                       fg->graph_desc;
1155
1156     avfilter_graph_free(&fg->graph);
1157     if (!(fg->graph = avfilter_graph_alloc()))
1158         return AVERROR(ENOMEM);
1159
1160     if (simple) {
1161         OutputStream *ost = fg->outputs[0]->ost;
1162         char args[255];
1163         snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
1164         fg->graph->scale_sws_opts = av_strdup(args);
1165     }
1166
1167     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1168         return ret;
1169
1170     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1171         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
1172                "exactly one input and output.\n", graph_desc);
1173         return AVERROR(EINVAL);
1174     }
1175
1176     for (cur = inputs; !simple && init && cur; cur = cur->next)
1177         init_input_filter(fg, cur);
1178
1179     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1180         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
1181             return ret;
1182     avfilter_inout_free(&inputs);
1183
1184     if (!init || simple) {
1185         /* we already know the mappings between lavfi outputs and output streams,
1186          * so we can finish the setup */
1187         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1188             configure_output_filter(fg, fg->outputs[i], cur);
1189         avfilter_inout_free(&outputs);
1190
1191         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1192             return ret;
1193     } else {
1194         /* wait until output mappings are processed */
1195         for (cur = outputs; cur;) {
1196             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
1197                                      &fg->nb_outputs, fg->nb_outputs + 1);
1198             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
1199                 exit_program(1);
1200             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
1201             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
1202             cur = cur->next;
1203             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
1204         }
1205     }
1206
1207     return 0;
1208 }
1209
1210 static int configure_complex_filters(void)
1211 {
1212     int i, ret = 0;
1213
1214     for (i = 0; i < nb_filtergraphs; i++)
1215         if (!filtergraphs[i]->graph &&
1216             (ret = configure_filtergraph(filtergraphs[i])) < 0)
1217             return ret;
1218     return 0;
1219 }
1220
1221 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1222 {
1223     int i;
1224     for (i = 0; i < fg->nb_inputs; i++)
1225         if (fg->inputs[i]->ist == ist)
1226             return 1;
1227     return 0;
1228 }
1229
1230 static void term_exit(void)
1231 {
1232     av_log(NULL, AV_LOG_QUIET, "%s", "");
1233 #if HAVE_TERMIOS_H
1234     if(restore_tty)
1235         tcsetattr (0, TCSANOW, &oldtty);
1236 #endif
1237 }
1238
1239 static volatile int received_sigterm = 0;
1240
1241 static void sigterm_handler(int sig)
1242 {
1243     received_sigterm = sig;
1244     received_nb_signals++;
1245     term_exit();
1246     if(received_nb_signals > 3)
1247         exit(123);
1248 }
1249
1250 static void term_init(void)
1251 {
1252 #if HAVE_TERMIOS_H
1253     if(!run_as_daemon){
1254         struct termios tty;
1255         int istty = 1;
1256 #if HAVE_ISATTY
1257         istty = isatty(0) && isatty(2);
1258 #endif
1259         if (istty && tcgetattr (0, &tty) == 0) {
1260             oldtty = tty;
1261             restore_tty = 1;
1262             atexit(term_exit);
1263
1264             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1265                              |INLCR|IGNCR|ICRNL|IXON);
1266             tty.c_oflag |= OPOST;
1267             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1268             tty.c_cflag &= ~(CSIZE|PARENB);
1269             tty.c_cflag |= CS8;
1270             tty.c_cc[VMIN] = 1;
1271             tty.c_cc[VTIME] = 0;
1272
1273             tcsetattr (0, TCSANOW, &tty);
1274         }
1275         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
1276     }
1277 #endif
1278     avformat_network_deinit();
1279
1280     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1281     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1282 #ifdef SIGXCPU
1283     signal(SIGXCPU, sigterm_handler);
1284 #endif
1285 }
1286
1287 /* read a key without blocking */
1288 static int read_key(void)
1289 {
1290     unsigned char ch;
1291 #if HAVE_TERMIOS_H
1292     int n = 1;
1293     struct timeval tv;
1294     fd_set rfds;
1295
1296     FD_ZERO(&rfds);
1297     FD_SET(0, &rfds);
1298     tv.tv_sec = 0;
1299     tv.tv_usec = 0;
1300     n = select(1, &rfds, NULL, NULL, &tv);
1301     if (n > 0) {
1302         n = read(0, &ch, 1);
1303         if (n == 1)
1304             return ch;
1305
1306         return n;
1307     }
1308 #elif HAVE_KBHIT
1309 #    if HAVE_PEEKNAMEDPIPE
1310     static int is_pipe;
1311     static HANDLE input_handle;
1312     DWORD dw, nchars;
1313     if(!input_handle){
1314         input_handle = GetStdHandle(STD_INPUT_HANDLE);
1315         is_pipe = !GetConsoleMode(input_handle, &dw);
1316     }
1317
1318     if (stdin->_cnt > 0) {
1319         read(0, &ch, 1);
1320         return ch;
1321     }
1322     if (is_pipe) {
1323         /* When running under a GUI, you will end here. */
1324         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL))
1325             return -1;
1326         //Read it
1327         if(nchars != 0) {
1328             read(0, &ch, 1);
1329             return ch;
1330         }else{
1331             return -1;
1332         }
1333     }
1334 #    endif
1335     if(kbhit())
1336         return(getch());
1337 #endif
1338     return -1;
1339 }
1340
1341 static int decode_interrupt_cb(void *ctx)
1342 {
1343     return received_nb_signals > 1;
1344 }
1345
1346 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1347
1348 void av_noreturn exit_program(int ret)
1349 {
1350     int i, j;
1351
1352     for (i = 0; i < nb_filtergraphs; i++) {
1353         avfilter_graph_free(&filtergraphs[i]->graph);
1354         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
1355             av_freep(&filtergraphs[i]->inputs[j]->name);
1356             av_freep(&filtergraphs[i]->inputs[j]);
1357         }
1358         av_freep(&filtergraphs[i]->inputs);
1359         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
1360             av_freep(&filtergraphs[i]->outputs[j]->name);
1361             av_freep(&filtergraphs[i]->outputs[j]);
1362         }
1363         av_freep(&filtergraphs[i]->outputs);
1364         av_freep(&filtergraphs[i]);
1365     }
1366     av_freep(&filtergraphs);
1367
1368     /* close files */
1369     for (i = 0; i < nb_output_files; i++) {
1370         AVFormatContext *s = output_files[i]->ctx;
1371         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1372             avio_close(s->pb);
1373         avformat_free_context(s);
1374         av_dict_free(&output_files[i]->opts);
1375         av_freep(&output_files[i]);
1376     }
1377     for (i = 0; i < nb_output_streams; i++) {
1378         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1379         while (bsfc) {
1380             AVBitStreamFilterContext *next = bsfc->next;
1381             av_bitstream_filter_close(bsfc);
1382             bsfc = next;
1383         }
1384         output_streams[i]->bitstream_filters = NULL;
1385
1386         av_freep(&output_streams[i]->filtered_frame);
1387         av_freep(&output_streams[i]->avfilter);
1388         av_freep(&output_streams[i]);
1389     }
1390     for (i = 0; i < nb_input_files; i++) {
1391         avformat_close_input(&input_files[i]->ctx);
1392         av_freep(&input_files[i]);
1393     }
1394     for (i = 0; i < nb_input_streams; i++) {
1395         av_freep(&input_streams[i]->decoded_frame);
1396         av_dict_free(&input_streams[i]->opts);
1397         free_buffer_pool(&input_streams[i]->buffer_pool);
1398         av_freep(&input_streams[i]->filters);
1399         av_freep(&input_streams[i]);
1400     }
1401
1402     if (vstats_file)
1403         fclose(vstats_file);
1404     av_free(vstats_filename);
1405
1406     av_freep(&input_streams);
1407     av_freep(&input_files);
1408     av_freep(&output_streams);
1409     av_freep(&output_files);
1410
1411     uninit_opts();
1412
1413     avfilter_uninit();
1414     avformat_network_deinit();
1415
1416     if (received_sigterm) {
1417         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1418                (int) received_sigterm);
1419         exit (255);
1420     }
1421
1422     exit(ret);
1423 }
1424
1425 static void assert_avoptions(AVDictionary *m)
1426 {
1427     AVDictionaryEntry *t;
1428     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1429         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1430         exit_program(1);
1431     }
1432 }
1433
1434 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1435 {
1436     const char *codec_string = encoder ? "encoder" : "decoder";
1437     AVCodec *codec;
1438     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1439         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1440         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1441                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1442                 codec_string, c->codec->name);
1443         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1444         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1445             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1446                    codec_string, codec->name);
1447         exit_program(1);
1448     }
1449 }
1450
1451 static void choose_sample_fmt(AVStream *st, AVCodec *codec)
1452 {
1453     if (codec && codec->sample_fmts) {
1454         const enum AVSampleFormat *p = codec->sample_fmts;
1455         for (; *p != -1; p++) {
1456             if (*p == st->codec->sample_fmt)
1457                 break;
1458         }
1459         if (*p == -1) {
1460             if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
1461                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
1462             if(av_get_sample_fmt_name(st->codec->sample_fmt))
1463             av_log(NULL, AV_LOG_WARNING,
1464                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
1465                    av_get_sample_fmt_name(st->codec->sample_fmt),
1466                    codec->name,
1467                    av_get_sample_fmt_name(codec->sample_fmts[0]));
1468             st->codec->sample_fmt = codec->sample_fmts[0];
1469         }
1470     }
1471 }
1472
1473 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1474 {
1475     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1476     AVCodecContext          *avctx = ost->st->codec;
1477     int ret;
1478
1479     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
1480         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
1481         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1482
1483     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1484         int64_t max = ost->st->cur_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
1485         if (ost->st->cur_dts && ost->st->cur_dts != AV_NOPTS_VALUE &&  max > pkt->dts) {
1486             av_log(s, max - pkt->dts > 2 ? AV_LOG_WARNING : AV_LOG_DEBUG, "Audio timestamp %"PRId64" < %"PRId64" invalid, cliping\n", pkt->dts, max);
1487             pkt->pts = pkt->dts = max;
1488         }
1489     }
1490
1491     /*
1492      * Audio encoders may split the packets --  #frames in != #packets out.
1493      * But there is no reordering, so we can limit the number of output packets
1494      * by simply dropping them here.
1495      * Counting encoded video frames needs to be done separately because of
1496      * reordering, see do_video_out()
1497      */
1498     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1499         if (ost->frame_number >= ost->max_frames) {
1500             av_free_packet(pkt);
1501             return;
1502         }
1503         ost->frame_number++;
1504     }
1505
1506     while (bsfc) {
1507         AVPacket new_pkt = *pkt;
1508         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1509                                            &new_pkt.data, &new_pkt.size,
1510                                            pkt->data, pkt->size,
1511                                            pkt->flags & AV_PKT_FLAG_KEY);
1512         if (a > 0) {
1513             av_free_packet(pkt);
1514             new_pkt.destruct = av_destruct_packet;
1515         } else if (a < 0) {
1516             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
1517                    bsfc->filter->name, pkt->stream_index,
1518                    avctx->codec ? avctx->codec->name : "copy");
1519             print_error("", a);
1520             if (exit_on_error)
1521                 exit_program(1);
1522         }
1523         *pkt = new_pkt;
1524
1525         bsfc = bsfc->next;
1526     }
1527
1528     pkt->stream_index = ost->index;
1529     ret = av_interleaved_write_frame(s, pkt);
1530     if (ret < 0) {
1531         print_error("av_interleaved_write_frame()", ret);
1532         exit_program(1);
1533     }
1534 }
1535
1536 static int check_recording_time(OutputStream *ost)
1537 {
1538     OutputFile *of = output_files[ost->file_index];
1539
1540     if (of->recording_time != INT64_MAX &&
1541         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
1542                       AV_TIME_BASE_Q) >= 0) {
1543         ost->is_past_recording_time = 1;
1544         return 0;
1545     }
1546     return 1;
1547 }
1548
1549 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1550                          AVFrame *frame)
1551 {
1552     AVCodecContext *enc = ost->st->codec;
1553     AVPacket pkt;
1554     int got_packet = 0;
1555
1556     av_init_packet(&pkt);
1557     pkt.data = NULL;
1558     pkt.size = 0;
1559 #if 0
1560     if (!check_recording_time(ost))
1561         return;
1562 #endif
1563     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
1564         frame->pts = ost->sync_opts;
1565     ost->sync_opts = frame->pts + frame->nb_samples;
1566
1567     av_assert0(pkt.size || !pkt.data);
1568     update_benchmark(NULL);
1569     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1570         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
1571         exit_program(1);
1572     }
1573     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
1574
1575     if (got_packet) {
1576         if (pkt.pts != AV_NOPTS_VALUE)
1577             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1578         if (pkt.dts != AV_NOPTS_VALUE)
1579             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1580         if (pkt.duration > 0)
1581             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1582
1583         if (debug_ts) {
1584             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
1585                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1586                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1587                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1588         }
1589
1590         write_frame(s, &pkt, ost);
1591
1592         audio_size += pkt.size;
1593         av_free_packet(&pkt);
1594     }
1595 }
1596
1597 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1598 {
1599     AVCodecContext *dec;
1600     AVPicture *picture2;
1601     AVPicture picture_tmp;
1602     uint8_t *buf = 0;
1603
1604     dec = ist->st->codec;
1605
1606     /* deinterlace : must be done before any resize */
1607     if (do_deinterlace) {
1608         int size;
1609
1610         /* create temporary picture */
1611         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1612         buf  = av_malloc(size);
1613         if (!buf)
1614             return;
1615
1616         picture2 = &picture_tmp;
1617         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1618
1619         if (avpicture_deinterlace(picture2, picture,
1620                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1621             /* if error, do not deinterlace */
1622             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1623             av_free(buf);
1624             buf = NULL;
1625             picture2 = picture;
1626         }
1627     } else {
1628         picture2 = picture;
1629     }
1630
1631     if (picture != picture2)
1632         *picture = *picture2;
1633     *bufp = buf;
1634 }
1635
1636 static void do_subtitle_out(AVFormatContext *s,
1637                             OutputStream *ost,
1638                             InputStream *ist,
1639                             AVSubtitle *sub,
1640                             int64_t pts)
1641 {
1642     static uint8_t *subtitle_out = NULL;
1643     int subtitle_out_max_size = 1024 * 1024;
1644     int subtitle_out_size, nb, i;
1645     AVCodecContext *enc;
1646     AVPacket pkt;
1647
1648     if (pts == AV_NOPTS_VALUE) {
1649         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1650         if (exit_on_error)
1651             exit_program(1);
1652         return;
1653     }
1654
1655     enc = ost->st->codec;
1656
1657     if (!subtitle_out) {
1658         subtitle_out = av_malloc(subtitle_out_max_size);
1659     }
1660
1661     /* Note: DVB subtitle need one packet to draw them and one other
1662        packet to clear them */
1663     /* XXX: signal it in the codec context ? */
1664     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1665         nb = 2;
1666     else
1667         nb = 1;
1668
1669     for (i = 0; i < nb; i++) {
1670         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1671
1672         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1673         // start_display_time is required to be 0
1674         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1675         sub->end_display_time  -= sub->start_display_time;
1676         sub->start_display_time = 0;
1677         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1678                                                     subtitle_out_max_size, sub);
1679         if (subtitle_out_size < 0) {
1680             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1681             exit_program(1);
1682         }
1683
1684         av_init_packet(&pkt);
1685         pkt.data = subtitle_out;
1686         pkt.size = subtitle_out_size;
1687         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1688         pkt.duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->st->time_base);
1689         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1690             /* XXX: the pts correction is handled here. Maybe handling
1691                it in the codec would be better */
1692             if (i == 0)
1693                 pkt.pts += 90 * sub->start_display_time;
1694             else
1695                 pkt.pts += 90 * sub->end_display_time;
1696         }
1697         write_frame(s, &pkt, ost);
1698         subtitle_size += pkt.size;
1699     }
1700 }
1701
1702 static void do_video_out(AVFormatContext *s,
1703                          OutputStream *ost,
1704                          AVFrame *in_picture,
1705                          float quality)
1706 {
1707     int ret, format_video_sync;
1708     AVPacket pkt;
1709     AVCodecContext *enc = ost->st->codec;
1710     int nb_frames;
1711     double sync_ipts, delta;
1712     double duration = 0;
1713     int frame_size = 0;
1714     InputStream *ist = NULL;
1715
1716     if (ost->source_index >= 0)
1717         ist = input_streams[ost->source_index];
1718
1719     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
1720         duration = 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base));
1721
1722     sync_ipts = in_picture->pts;
1723     delta = sync_ipts - ost->sync_opts + duration;
1724
1725     /* by default, we output a single frame */
1726     nb_frames = 1;
1727
1728     format_video_sync = video_sync_method;
1729     if (format_video_sync == VSYNC_AUTO)
1730         format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : 1;
1731
1732     switch (format_video_sync) {
1733     case VSYNC_CFR:
1734         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
1735         if (delta < -1.1)
1736             nb_frames = 0;
1737         else if (delta > 1.1)
1738             nb_frames = lrintf(delta);
1739         break;
1740     case VSYNC_VFR:
1741         if (delta <= -0.6)
1742             nb_frames = 0;
1743         else if (delta > 0.6)
1744             ost->sync_opts = lrint(sync_ipts);
1745         break;
1746     case VSYNC_DROP:
1747     case VSYNC_PASSTHROUGH:
1748         ost->sync_opts = lrint(sync_ipts);
1749         break;
1750     default:
1751         av_assert0(0);
1752     }
1753
1754     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
1755     if (nb_frames == 0) {
1756         nb_frames_drop++;
1757         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1758         return;
1759     } else if (nb_frames > 1) {
1760         nb_frames_dup += nb_frames - 1;
1761         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
1762     }
1763
1764
1765 duplicate_frame:
1766     av_init_packet(&pkt);
1767     pkt.data = NULL;
1768     pkt.size = 0;
1769
1770     in_picture->pts = ost->sync_opts;
1771
1772     if (s->oformat->flags & AVFMT_RAWPICTURE &&
1773         enc->codec->id == CODEC_ID_RAWVIDEO) {
1774         /* raw pictures are written as AVPicture structure to
1775            avoid any copies. We support temporarily the older
1776            method. */
1777         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1778         enc->coded_frame->top_field_first  = in_picture->top_field_first;
1779         pkt.data   = (uint8_t *)in_picture;
1780         pkt.size   =  sizeof(AVPicture);
1781         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
1782         pkt.flags |= AV_PKT_FLAG_KEY;
1783
1784         write_frame(s, &pkt, ost);
1785         video_size += pkt.size;
1786     } else {
1787         int got_packet;
1788         AVFrame big_picture;
1789
1790         big_picture = *in_picture;
1791         /* better than nothing: use input picture interlaced
1792            settings */
1793         big_picture.interlaced_frame = in_picture->interlaced_frame;
1794         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1795             if (ost->top_field_first == -1)
1796                 big_picture.top_field_first = in_picture->top_field_first;
1797             else
1798                 big_picture.top_field_first = !!ost->top_field_first;
1799         }
1800
1801         /* handles same_quant here. This is not correct because it may
1802            not be a global option */
1803         big_picture.quality = quality;
1804         if (!enc->me_threshold)
1805             big_picture.pict_type = 0;
1806         if (ost->forced_kf_index < ost->forced_kf_count &&
1807             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1808             big_picture.pict_type = AV_PICTURE_TYPE_I;
1809             ost->forced_kf_index++;
1810         }
1811         update_benchmark(NULL);
1812         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
1813         update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
1814         if (ret < 0) {
1815             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1816             exit_program(1);
1817         }
1818
1819         if (got_packet) {
1820             if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
1821                 pkt.pts = ost->sync_opts;
1822
1823             if (pkt.pts != AV_NOPTS_VALUE)
1824                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1825             if (pkt.dts != AV_NOPTS_VALUE)
1826                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1827
1828             if (debug_ts) {
1829                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1830                     "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1831                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1832                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1833             }
1834
1835             write_frame(s, &pkt, ost);
1836             frame_size = pkt.size;
1837             video_size += pkt.size;
1838             av_free_packet(&pkt);
1839
1840             /* if two pass, output log */
1841             if (ost->logfile && enc->stats_out) {
1842                 fprintf(ost->logfile, "%s", enc->stats_out);
1843             }
1844         }
1845     }
1846     ost->sync_opts++;
1847     /*
1848      * For video, number of frames in == number of packets out.
1849      * But there may be reordering, so we can't throw away frames on encoder
1850      * flush, we need to limit them here, before they go into encoder.
1851      */
1852     ost->frame_number++;
1853
1854     if(--nb_frames)
1855         goto duplicate_frame;
1856
1857     if (vstats_filename && frame_size)
1858         do_video_stats(output_files[ost->file_index]->ctx, ost, frame_size);
1859 }
1860
1861 static double psnr(double d)
1862 {
1863     return -10.0 * log(d) / log(10.0);
1864 }
1865
1866 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1867                            int frame_size)
1868 {
1869     AVCodecContext *enc;
1870     int frame_number;
1871     double ti1, bitrate, avg_bitrate;
1872
1873     /* this is executed just the first time do_video_stats is called */
1874     if (!vstats_file) {
1875         vstats_file = fopen(vstats_filename, "w");
1876         if (!vstats_file) {
1877             perror("fopen");
1878             exit_program(1);
1879         }
1880     }
1881
1882     enc = ost->st->codec;
1883     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1884         frame_number = ost->frame_number;
1885         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1886         if (enc->flags&CODEC_FLAG_PSNR)
1887             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1888
1889         fprintf(vstats_file,"f_size= %6d ", frame_size);
1890         /* compute pts value */
1891         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1892         if (ti1 < 0.01)
1893             ti1 = 0.01;
1894
1895         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1896         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1897         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1898                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1899         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1900     }
1901 }
1902
1903 /* check for new output on any of the filtergraphs */
1904 static int poll_filters(void)
1905 {
1906     AVFilterBufferRef *picref;
1907     AVFrame *filtered_frame = NULL;
1908     int i, ret, ret_all;
1909     unsigned nb_success, nb_eof;
1910     int64_t frame_pts;
1911
1912     while (1) {
1913         /* Reap all buffers present in the buffer sinks */
1914         for (i = 0; i < nb_output_streams; i++) {
1915             OutputStream *ost = output_streams[i];
1916             OutputFile    *of = output_files[ost->file_index];
1917             int ret = 0;
1918
1919             if (!ost->filter)
1920                 continue;
1921
1922             if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
1923                 return AVERROR(ENOMEM);
1924             } else
1925                 avcodec_get_frame_defaults(ost->filtered_frame);
1926             filtered_frame = ost->filtered_frame;
1927
1928             while (!ost->is_past_recording_time) {
1929                 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1930                     !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1931                     ret = av_buffersink_read_samples(ost->filter->filter, &picref,
1932                                                     ost->st->codec->frame_size);
1933                 else if(ost->enc->type == AVMEDIA_TYPE_AUDIO)
1934                     ret = av_buffersink_read(ost->filter->filter, &picref);
1935                 else
1936                     ret = av_buffersink_get_buffer_ref(ost->filter->filter, &picref,
1937                                                        AV_BUFFERSINK_FLAG_NO_REQUEST);
1938                 if (ret < 0) {
1939                     if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1940                         char buf[256];
1941                         av_strerror(ret, buf, sizeof(buf));
1942                         av_log(NULL, AV_LOG_WARNING,
1943                                "Error in av_buffersink_get_buffer_ref(): %s\n", buf);
1944                     }
1945                     break;
1946                 }
1947                 frame_pts = AV_NOPTS_VALUE;
1948                 if (picref->pts != AV_NOPTS_VALUE) {
1949                     filtered_frame->pts = frame_pts = av_rescale_q(picref->pts,
1950                                                     ost->filter->filter->inputs[0]->time_base,
1951                                                     ost->st->codec->time_base) -
1952                                         av_rescale_q(of->start_time,
1953                                                     AV_TIME_BASE_Q,
1954                                                     ost->st->codec->time_base);
1955
1956                     if (of->start_time && filtered_frame->pts < 0) {
1957                         avfilter_unref_buffer(picref);
1958                         continue;
1959                     }
1960                 }
1961                 //if (ost->source_index >= 0)
1962                 //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1963
1964
1965                 switch (ost->filter->filter->inputs[0]->type) {
1966                 case AVMEDIA_TYPE_VIDEO:
1967                     avfilter_fill_frame_from_video_buffer_ref(filtered_frame, picref);
1968                     filtered_frame->pts = frame_pts;
1969                     if (!ost->frame_aspect_ratio)
1970                         ost->st->codec->sample_aspect_ratio = picref->video->sample_aspect_ratio;
1971
1972                     do_video_out(of->ctx, ost, filtered_frame,
1973                                  same_quant ? ost->last_quality :
1974                                               ost->st->codec->global_quality);
1975                     break;
1976                 case AVMEDIA_TYPE_AUDIO:
1977                     avfilter_copy_buf_props(filtered_frame, picref);
1978                     filtered_frame->pts = frame_pts;
1979                     do_audio_out(of->ctx, ost, filtered_frame);
1980                     break;
1981                 default:
1982                     // TODO support subtitle filters
1983                     av_assert0(0);
1984                 }
1985
1986                 avfilter_unref_buffer(picref);
1987             }
1988         }
1989         /* Request frames through all the graphs */
1990         ret_all = nb_success = nb_eof = 0;
1991         for (i = 0; i < nb_filtergraphs; i++) {
1992             ret = avfilter_graph_request_oldest(filtergraphs[i]->graph);
1993             if (!ret) {
1994                 nb_success++;
1995             } else if (ret == AVERROR_EOF) {
1996                 nb_eof++;
1997             } else if (ret != AVERROR(EAGAIN)) {
1998                 char buf[256];
1999                 av_strerror(ret, buf, sizeof(buf));
2000                 av_log(NULL, AV_LOG_WARNING,
2001                        "Error in request_frame(): %s\n", buf);
2002                 ret_all = ret;
2003             }
2004         }
2005         if (!nb_success)
2006             break;
2007         /* Try again if anything succeeded */
2008     }
2009     return nb_eof == nb_filtergraphs ? AVERROR_EOF : ret_all;
2010 }
2011
2012 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
2013 {
2014     char buf[1024];
2015     OutputStream *ost;
2016     AVFormatContext *oc;
2017     int64_t total_size;
2018     AVCodecContext *enc;
2019     int frame_number, vid, i;
2020     double bitrate;
2021     int64_t pts = INT64_MAX;
2022     static int64_t last_time = -1;
2023     static int qp_histogram[52];
2024     int hours, mins, secs, us;
2025
2026     if (!print_stats && !is_last_report)
2027         return;
2028
2029     if (!is_last_report) {
2030         if (last_time == -1) {
2031             last_time = cur_time;
2032             return;
2033         }
2034         if ((cur_time - last_time) < 500000)
2035             return;
2036         last_time = cur_time;
2037     }
2038
2039
2040     oc = output_files[0]->ctx;
2041
2042     total_size = avio_size(oc->pb);
2043     if (total_size < 0) { // FIXME improve avio_size() so it works with non seekable output too
2044         total_size = avio_tell(oc->pb);
2045         if (total_size < 0)
2046             total_size = 0;
2047     }
2048
2049     buf[0] = '\0';
2050     vid = 0;
2051     for (i = 0; i < nb_output_streams; i++) {
2052         float q = -1;
2053         ost = output_streams[i];
2054         enc = ost->st->codec;
2055         if (!ost->stream_copy && enc->coded_frame)
2056             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
2057         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2058             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
2059         }
2060         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2061             float fps, t = (cur_time-timer_start) / 1000000.0;
2062
2063             frame_number = ost->frame_number;
2064             fps = t > 1 ? frame_number / t : 0;
2065             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
2066                      frame_number, fps < 9.95, fps, q);
2067             if (is_last_report)
2068                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
2069             if (qp_hist) {
2070                 int j;
2071                 int qp = lrintf(q);
2072                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
2073                     qp_histogram[qp]++;
2074                 for (j = 0; j < 32; j++)
2075                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
2076             }
2077             if (enc->flags&CODEC_FLAG_PSNR) {
2078                 int j;
2079                 double error, error_sum = 0;
2080                 double scale, scale_sum = 0;
2081                 char type[3] = { 'Y','U','V' };
2082                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
2083                 for (j = 0; j < 3; j++) {
2084                     if (is_last_report) {
2085                         error = enc->error[j];
2086                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
2087                     } else {
2088                         error = enc->coded_frame->error[j];
2089                         scale = enc->width * enc->height * 255.0 * 255.0;
2090                     }
2091                     if (j)
2092                         scale /= 4;
2093                     error_sum += error;
2094                     scale_sum += scale;
2095                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
2096                 }
2097                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
2098             }
2099             vid = 1;
2100         }
2101         /* compute min output value */
2102         pts = FFMIN(pts, av_rescale_q(ost->st->pts.val,
2103                                       ost->st->time_base, AV_TIME_BASE_Q));
2104     }
2105
2106     secs = pts / AV_TIME_BASE;
2107     us = pts % AV_TIME_BASE;
2108     mins = secs / 60;
2109     secs %= 60;
2110     hours = mins / 60;
2111     mins %= 60;
2112
2113     bitrate = pts ? total_size * 8 / (pts / 1000.0) : 0;
2114
2115     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2116              "size=%8.0fkB time=", total_size / 1024.0);
2117     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2118              "%02d:%02d:%02d.%02d ", hours, mins, secs,
2119              (100 * us) / AV_TIME_BASE);
2120     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2121              "bitrate=%6.1fkbits/s", bitrate);
2122
2123     if (nb_frames_dup || nb_frames_drop)
2124         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
2125                 nb_frames_dup, nb_frames_drop);
2126
2127     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
2128
2129     fflush(stderr);
2130
2131     if (is_last_report) {
2132         int64_t raw= audio_size + video_size + subtitle_size + extra_size;
2133         av_log(NULL, AV_LOG_INFO, "\n");
2134         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB subtitle:%1.0f global headers:%1.0fkB muxing overhead %f%%\n",
2135                video_size / 1024.0,
2136                audio_size / 1024.0,
2137                subtitle_size / 1024.0,
2138                extra_size / 1024.0,
2139                100.0 * (total_size - raw) / raw
2140         );
2141         if(video_size + audio_size + subtitle_size + extra_size == 0){
2142             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
2143         }
2144     }
2145 }
2146
2147 static void flush_encoders(void)
2148 {
2149     int i, ret;
2150
2151     for (i = 0; i < nb_output_streams; i++) {
2152         OutputStream   *ost = output_streams[i];
2153         AVCodecContext *enc = ost->st->codec;
2154         AVFormatContext *os = output_files[ost->file_index]->ctx;
2155         int stop_encoding = 0;
2156
2157         if (!ost->encoding_needed)
2158             continue;
2159
2160         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
2161             continue;
2162         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
2163             continue;
2164
2165         for (;;) {
2166             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
2167             const char *desc;
2168             int64_t *size;
2169
2170             switch (ost->st->codec->codec_type) {
2171             case AVMEDIA_TYPE_AUDIO:
2172                 encode = avcodec_encode_audio2;
2173                 desc   = "Audio";
2174                 size   = &audio_size;
2175                 break;
2176             case AVMEDIA_TYPE_VIDEO:
2177                 encode = avcodec_encode_video2;
2178                 desc   = "Video";
2179                 size   = &video_size;
2180                 break;
2181             default:
2182                 stop_encoding = 1;
2183             }
2184
2185             if (encode) {
2186                 AVPacket pkt;
2187                 int got_packet;
2188                 av_init_packet(&pkt);
2189                 pkt.data = NULL;
2190                 pkt.size = 0;
2191
2192                 update_benchmark(NULL);
2193                 ret = encode(enc, &pkt, NULL, &got_packet);
2194                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
2195                 if (ret < 0) {
2196                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
2197                     exit_program(1);
2198                 }
2199                 *size += pkt.size;
2200                 if (ost->logfile && enc->stats_out) {
2201                     fprintf(ost->logfile, "%s", enc->stats_out);
2202                 }
2203                 if (!got_packet) {
2204                     stop_encoding = 1;
2205                     break;
2206                 }
2207                 if (pkt.pts != AV_NOPTS_VALUE)
2208                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
2209                 if (pkt.dts != AV_NOPTS_VALUE)
2210                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
2211                 write_frame(os, &pkt, ost);
2212             }
2213
2214             if (stop_encoding)
2215                 break;
2216         }
2217     }
2218 }
2219
2220 /*
2221  * Check whether a packet from ist should be written into ost at this time
2222  */
2223 static int check_output_constraints(InputStream *ist, OutputStream *ost)
2224 {
2225     OutputFile *of = output_files[ost->file_index];
2226     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
2227
2228     if (ost->source_index != ist_index)
2229         return 0;
2230
2231     if (of->start_time && ist->pts < of->start_time)
2232         return 0;
2233
2234     if (of->recording_time != INT64_MAX &&
2235         av_compare_ts(ist->pts, AV_TIME_BASE_Q, of->recording_time + of->start_time,
2236                       (AVRational){ 1, 1000000 }) >= 0) {
2237         ost->is_past_recording_time = 1;
2238         return 0;
2239     }
2240
2241     return 1;
2242 }
2243
2244 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
2245 {
2246     OutputFile *of = output_files[ost->file_index];
2247     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
2248     AVPicture pict;
2249     AVPacket opkt;
2250
2251     av_init_packet(&opkt);
2252
2253     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
2254         !ost->copy_initial_nonkeyframes)
2255         return;
2256
2257     /* force the input stream PTS */
2258     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2259         audio_size += pkt->size;
2260     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2261         video_size += pkt->size;
2262         ost->sync_opts++;
2263     } else if (ost->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2264         subtitle_size += pkt->size;
2265     }
2266
2267     if (pkt->pts != AV_NOPTS_VALUE)
2268         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
2269     else
2270         opkt.pts = AV_NOPTS_VALUE;
2271
2272     if (pkt->dts == AV_NOPTS_VALUE)
2273         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
2274     else
2275         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
2276     opkt.dts -= ost_tb_start_time;
2277
2278     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
2279     opkt.flags    = pkt->flags;
2280
2281     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
2282     if (  ost->st->codec->codec_id != CODEC_ID_H264
2283        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
2284        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
2285        && ost->st->codec->codec_id != CODEC_ID_VC1
2286        ) {
2287         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
2288             opkt.destruct = av_destruct_packet;
2289     } else {
2290         opkt.data = pkt->data;
2291         opkt.size = pkt->size;
2292     }
2293     if (of->ctx->oformat->flags & AVFMT_RAWPICTURE) {
2294         /* store AVPicture in AVPacket, as expected by the output format */
2295         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
2296         opkt.data = (uint8_t *)&pict;
2297         opkt.size = sizeof(AVPicture);
2298         opkt.flags |= AV_PKT_FLAG_KEY;
2299     }
2300
2301     write_frame(of->ctx, &opkt, ost);
2302     ost->st->codec->frame_number++;
2303     av_free_packet(&opkt);
2304 }
2305
2306 static void rate_emu_sleep(InputStream *ist)
2307 {
2308     if (input_files[ist->file_index]->rate_emu) {
2309         int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
2310         int64_t now = av_gettime() - ist->start;
2311         if (pts > now)
2312             av_usleep(pts - now);
2313     }
2314 }
2315
2316 static int guess_input_channel_layout(InputStream *ist)
2317 {
2318     AVCodecContext *dec = ist->st->codec;
2319
2320     if (!dec->channel_layout) {
2321         char layout_name[256];
2322
2323         dec->channel_layout = av_get_default_channel_layout(dec->channels);
2324         if (!dec->channel_layout)
2325             return 0;
2326         av_get_channel_layout_string(layout_name, sizeof(layout_name),
2327                                      dec->channels, dec->channel_layout);
2328         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
2329                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
2330     }
2331     return 1;
2332 }
2333
2334 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
2335 {
2336     AVFrame *decoded_frame;
2337     AVCodecContext *avctx = ist->st->codec;
2338     int i, ret, resample_changed;
2339
2340     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2341         return AVERROR(ENOMEM);
2342     else
2343         avcodec_get_frame_defaults(ist->decoded_frame);
2344     decoded_frame = ist->decoded_frame;
2345
2346     update_benchmark(NULL);
2347     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
2348     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
2349     if (ret < 0) {
2350         return ret;
2351     }
2352     if (avctx->sample_rate <= 0) {
2353         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
2354         return AVERROR_INVALIDDATA;
2355     }
2356
2357     if (!*got_output) {
2358         /* no audio frame */
2359         if (!pkt->size)
2360             for (i = 0; i < ist->nb_filters; i++)
2361                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL,
2362                                      AV_BUFFERSRC_FLAG_NO_COPY);
2363         return ret;
2364     }
2365
2366     /* if the decoder provides a pts, use it instead of the last packet pts.
2367        the decoder could be delaying output by a packet or more. */
2368     if (decoded_frame->pts != AV_NOPTS_VALUE)
2369         ist->dts = ist->next_dts = ist->pts = ist->next_pts = decoded_frame->pts;
2370     else if (pkt->pts != AV_NOPTS_VALUE) {
2371         decoded_frame->pts = pkt->pts;
2372         pkt->pts           = AV_NOPTS_VALUE;
2373     }else
2374         decoded_frame->pts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
2375
2376
2377 #if 1
2378     /* increment next_dts to use for the case where the input stream does not
2379        have timestamps or there are multiple frames in the packet */
2380     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2381                      avctx->sample_rate;
2382     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2383                      avctx->sample_rate;
2384 #endif
2385
2386     rate_emu_sleep(ist);
2387
2388     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
2389                        ist->resample_channels       != avctx->channels               ||
2390                        ist->resample_channel_layout != decoded_frame->channel_layout ||
2391                        ist->resample_sample_rate    != decoded_frame->sample_rate;
2392     if (resample_changed) {
2393         char layout1[64], layout2[64];
2394
2395         if (!guess_input_channel_layout(ist)) {
2396             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
2397                    "layout for Input Stream #%d.%d\n", ist->file_index,
2398                    ist->st->index);
2399             exit_program(1);
2400         }
2401         decoded_frame->channel_layout = avctx->channel_layout;
2402
2403         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
2404                                      ist->resample_channel_layout);
2405         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
2406                                      decoded_frame->channel_layout);
2407
2408         av_log(NULL, AV_LOG_INFO,
2409                "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",
2410                ist->file_index, ist->st->index,
2411                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2412                ist->resample_channels, layout1,
2413                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2414                avctx->channels, layout2);
2415
2416         ist->resample_sample_fmt     = decoded_frame->format;
2417         ist->resample_sample_rate    = decoded_frame->sample_rate;
2418         ist->resample_channel_layout = decoded_frame->channel_layout;
2419         ist->resample_channels       = avctx->channels;
2420
2421         for (i = 0; i < nb_filtergraphs; i++)
2422             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2423                 configure_filtergraph(filtergraphs[i]) < 0) {
2424                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2425                 exit_program(1);
2426             }
2427     }
2428
2429     for (i = 0; i < ist->nb_filters; i++)
2430         av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, 0);
2431
2432     return ret;
2433 }
2434
2435 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
2436 {
2437     AVFrame *decoded_frame;
2438     void *buffer_to_free = NULL;
2439     int i, ret = 0, resample_changed;
2440     int64_t best_effort_timestamp;
2441     AVRational *frame_sample_aspect;
2442     float quality;
2443
2444     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2445         return AVERROR(ENOMEM);
2446     else
2447         avcodec_get_frame_defaults(ist->decoded_frame);
2448     decoded_frame = ist->decoded_frame;
2449     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
2450
2451     update_benchmark(NULL);
2452     ret = avcodec_decode_video2(ist->st->codec,
2453                                 decoded_frame, got_output, pkt);
2454     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
2455     if (ret < 0)
2456         return ret;
2457
2458     quality = same_quant ? decoded_frame->quality : 0;
2459     if (!*got_output) {
2460         /* no picture yet */
2461         if (!pkt->size)
2462             for (i = 0; i < ist->nb_filters; i++)
2463                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, AV_BUFFERSRC_FLAG_NO_COPY);
2464         return ret;
2465     }
2466
2467     if(ist->top_field_first>=0)
2468         decoded_frame->top_field_first = ist->top_field_first;
2469
2470     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
2471     if(best_effort_timestamp != AV_NOPTS_VALUE)
2472         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
2473
2474     pkt->size = 0;
2475     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2476
2477     rate_emu_sleep(ist);
2478
2479     if (ist->st->sample_aspect_ratio.num)
2480         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2481
2482     resample_changed = ist->resample_width   != decoded_frame->width  ||
2483                        ist->resample_height  != decoded_frame->height ||
2484                        ist->resample_pix_fmt != decoded_frame->format;
2485     if (resample_changed) {
2486         av_log(NULL, AV_LOG_INFO,
2487                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2488                ist->file_index, ist->st->index,
2489                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2490                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2491
2492         ist->resample_width   = decoded_frame->width;
2493         ist->resample_height  = decoded_frame->height;
2494         ist->resample_pix_fmt = decoded_frame->format;
2495
2496         for (i = 0; i < nb_filtergraphs; i++)
2497             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2498                 configure_filtergraph(filtergraphs[i]) < 0) {
2499                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2500                 exit_program(1);
2501             }
2502     }
2503
2504     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2505     for (i = 0; i < ist->nb_filters; i++) {
2506         int changed =      ist->st->codec->width   != ist->filters[i]->filter->outputs[0]->w
2507                         || ist->st->codec->height  != ist->filters[i]->filter->outputs[0]->h
2508                         || ist->st->codec->pix_fmt != ist->filters[i]->filter->outputs[0]->format;
2509         // XXX what an ugly hack
2510         if (ist->filters[i]->graph->nb_outputs == 1)
2511             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2512
2513         if (!frame_sample_aspect->num)
2514             *frame_sample_aspect = ist->st->sample_aspect_ratio;
2515         if (ist->dr1 && decoded_frame->type==FF_BUFFER_TYPE_USER && !changed) {
2516             FrameBuffer      *buf = decoded_frame->opaque;
2517             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2518                                         decoded_frame->data, decoded_frame->linesize,
2519                                         AV_PERM_READ | AV_PERM_PRESERVE,
2520                                         ist->st->codec->width, ist->st->codec->height,
2521                                         ist->st->codec->pix_fmt);
2522
2523             avfilter_copy_frame_props(fb, decoded_frame);
2524             fb->buf->priv           = buf;
2525             fb->buf->free           = filter_release_buffer;
2526
2527             av_assert0(buf->refcount>0);
2528             buf->refcount++;
2529             av_buffersrc_add_ref(ist->filters[i]->filter, fb,
2530                                  AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT |
2531                                  AV_BUFFERSRC_FLAG_NO_COPY);
2532         } else
2533         if(av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, 0)<0) {
2534             av_log(NULL, AV_LOG_FATAL, "Failed to inject frame into filter network\n");
2535             exit_program(1);
2536         }
2537
2538     }
2539
2540     av_free(buffer_to_free);
2541     return ret;
2542 }
2543
2544 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2545 {
2546     AVSubtitle subtitle;
2547     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2548                                           &subtitle, got_output, pkt);
2549     if (ret < 0)
2550         return ret;
2551     if (!*got_output)
2552         return ret;
2553
2554     rate_emu_sleep(ist);
2555
2556     for (i = 0; i < nb_output_streams; i++) {
2557         OutputStream *ost = output_streams[i];
2558
2559         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2560             continue;
2561
2562         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2563     }
2564
2565     avsubtitle_free(&subtitle);
2566     return ret;
2567 }
2568
2569 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2570 static int output_packet(InputStream *ist, const AVPacket *pkt)
2571 {
2572     int ret = 0, i;
2573     int got_output;
2574
2575     AVPacket avpkt;
2576     if (!ist->saw_first_ts) {
2577         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;
2578         ist->pts = 0;
2579         if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
2580             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2581             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
2582         }
2583         ist->saw_first_ts = 1;
2584     }
2585
2586     if (ist->next_dts == AV_NOPTS_VALUE)
2587         ist->next_dts = ist->dts;
2588     if (ist->next_pts == AV_NOPTS_VALUE)
2589         ist->next_pts = ist->pts;
2590
2591     if (pkt == NULL) {
2592         /* EOF handling */
2593         av_init_packet(&avpkt);
2594         avpkt.data = NULL;
2595         avpkt.size = 0;
2596         goto handle_eof;
2597     } else {
2598         avpkt = *pkt;
2599     }
2600
2601     if (pkt->dts != AV_NOPTS_VALUE) {
2602         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2603         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2604             ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2605     }
2606
2607     // while we have more to decode or while the decoder did output something on EOF
2608     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2609         int duration;
2610     handle_eof:
2611
2612         ist->pts = ist->next_pts;
2613         ist->dts = ist->next_dts;
2614
2615         if (avpkt.size && avpkt.size != pkt->size) {
2616             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2617                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2618             ist->showed_multi_packet_warning = 1;
2619         }
2620
2621         switch (ist->st->codec->codec_type) {
2622         case AVMEDIA_TYPE_AUDIO:
2623             ret = decode_audio    (ist, &avpkt, &got_output);
2624             break;
2625         case AVMEDIA_TYPE_VIDEO:
2626             ret = decode_video    (ist, &avpkt, &got_output);
2627             if (avpkt.duration) {
2628                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2629             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
2630                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
2631                 duration = ((int64_t)AV_TIME_BASE *
2632                                 ist->st->codec->time_base.num * ticks) /
2633                                 ist->st->codec->time_base.den;
2634             } else
2635                 duration = 0;
2636
2637             if(ist->dts != AV_NOPTS_VALUE && duration) {
2638                 ist->next_dts += duration;
2639             }else
2640                 ist->next_dts = AV_NOPTS_VALUE;
2641
2642             if (got_output)
2643                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
2644             break;
2645         case AVMEDIA_TYPE_SUBTITLE:
2646             ret = transcode_subtitles(ist, &avpkt, &got_output);
2647             break;
2648         default:
2649             return -1;
2650         }
2651
2652         if (ret < 0)
2653             return ret;
2654
2655         avpkt.dts=
2656         avpkt.pts= AV_NOPTS_VALUE;
2657
2658         // touch data and size only if not EOF
2659         if (pkt) {
2660             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
2661                 ret = avpkt.size;
2662             avpkt.data += ret;
2663             avpkt.size -= ret;
2664         }
2665         if (!got_output) {
2666             continue;
2667         }
2668     }
2669
2670     /* handle stream copy */
2671     if (!ist->decoding_needed) {
2672         rate_emu_sleep(ist);
2673         ist->dts = ist->next_dts;
2674         switch (ist->st->codec->codec_type) {
2675         case AVMEDIA_TYPE_AUDIO:
2676             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2677                              ist->st->codec->sample_rate;
2678             break;
2679         case AVMEDIA_TYPE_VIDEO:
2680             if (pkt->duration) {
2681                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2682             } else if(ist->st->codec->time_base.num != 0) {
2683                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2684                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2685                                   ist->st->codec->time_base.num * ticks) /
2686                                   ist->st->codec->time_base.den;
2687             }
2688             break;
2689         }
2690         ist->pts = ist->dts;
2691         ist->next_pts = ist->next_dts;
2692     }
2693     for (i = 0; pkt && i < nb_output_streams; i++) {
2694         OutputStream *ost = output_streams[i];
2695
2696         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2697             continue;
2698
2699         do_streamcopy(ist, ost, pkt);
2700     }
2701
2702     return 0;
2703 }
2704
2705 static void print_sdp(void)
2706 {
2707     char sdp[2048];
2708     int i;
2709     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2710
2711     if (!avc)
2712         exit_program(1);
2713     for (i = 0; i < nb_output_files; i++)
2714         avc[i] = output_files[i]->ctx;
2715
2716     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2717     printf("SDP:\n%s\n", sdp);
2718     fflush(stdout);
2719     av_freep(&avc);
2720 }
2721
2722 static int init_input_stream(int ist_index, char *error, int error_len)
2723 {
2724     InputStream *ist = input_streams[ist_index];
2725
2726     if (ist->decoding_needed) {
2727         AVCodec *codec = ist->dec;
2728         if (!codec) {
2729             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2730                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
2731             return AVERROR(EINVAL);
2732         }
2733
2734         ist->dr1 = (codec->capabilities & CODEC_CAP_DR1) && !do_deinterlace;
2735         if (codec->type == AVMEDIA_TYPE_VIDEO && ist->dr1) {
2736             ist->st->codec->get_buffer     = codec_get_buffer;
2737             ist->st->codec->release_buffer = codec_release_buffer;
2738             ist->st->codec->opaque         = &ist->buffer_pool;
2739         }
2740
2741         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2742             av_dict_set(&ist->opts, "threads", "auto", 0);
2743         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2744             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2745                     ist->file_index, ist->st->index);
2746             return AVERROR(EINVAL);
2747         }
2748         assert_codec_experimental(ist->st->codec, 0);
2749         assert_avoptions(ist->opts);
2750     }
2751
2752     ist->next_pts = AV_NOPTS_VALUE;
2753     ist->next_dts = AV_NOPTS_VALUE;
2754     ist->is_start = 1;
2755
2756     return 0;
2757 }
2758
2759 static InputStream *get_input_stream(OutputStream *ost)
2760 {
2761     if (ost->source_index >= 0)
2762         return input_streams[ost->source_index];
2763     return NULL;
2764 }
2765
2766 static int transcode_init(void)
2767 {
2768     int ret = 0, i, j, k;
2769     AVFormatContext *oc;
2770     AVCodecContext *codec, *icodec = NULL;
2771     OutputStream *ost;
2772     InputStream *ist;
2773     char error[1024];
2774     int want_sdp = 1;
2775
2776     /* init framerate emulation */
2777     for (i = 0; i < nb_input_files; i++) {
2778         InputFile *ifile = input_files[i];
2779         if (ifile->rate_emu)
2780             for (j = 0; j < ifile->nb_streams; j++)
2781                 input_streams[j + ifile->ist_index]->start = av_gettime();
2782     }
2783
2784     /* output stream init */
2785     for (i = 0; i < nb_output_files; i++) {
2786         oc = output_files[i]->ctx;
2787         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2788             av_dump_format(oc, i, oc->filename, 1);
2789             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2790             return AVERROR(EINVAL);
2791         }
2792     }
2793
2794     /* init complex filtergraphs */
2795     for (i = 0; i < nb_filtergraphs; i++)
2796         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2797             return ret;
2798
2799     /* for each output stream, we compute the right encoding parameters */
2800     for (i = 0; i < nb_output_streams; i++) {
2801         ost = output_streams[i];
2802         oc  = output_files[ost->file_index]->ctx;
2803         ist = get_input_stream(ost);
2804
2805         if (ost->attachment_filename)
2806             continue;
2807
2808         codec  = ost->st->codec;
2809
2810         if (ist) {
2811             icodec = ist->st->codec;
2812
2813             ost->st->disposition          = ist->st->disposition;
2814             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2815             codec->chroma_sample_location = icodec->chroma_sample_location;
2816         }
2817
2818         if (ost->stream_copy) {
2819             uint64_t extra_size;
2820
2821             av_assert0(ist && !ost->filter);
2822
2823             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2824
2825             if (extra_size > INT_MAX) {
2826                 return AVERROR(EINVAL);
2827             }
2828
2829             /* if stream_copy is selected, no need to decode or encode */
2830             codec->codec_id   = icodec->codec_id;
2831             codec->codec_type = icodec->codec_type;
2832
2833             if (!codec->codec_tag) {
2834                 if (!oc->oformat->codec_tag ||
2835                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2836                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2837                     codec->codec_tag = icodec->codec_tag;
2838             }
2839
2840             codec->bit_rate       = icodec->bit_rate;
2841             codec->rc_max_rate    = icodec->rc_max_rate;
2842             codec->rc_buffer_size = icodec->rc_buffer_size;
2843             codec->field_order    = icodec->field_order;
2844             codec->extradata      = av_mallocz(extra_size);
2845             if (!codec->extradata) {
2846                 return AVERROR(ENOMEM);
2847             }
2848             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2849             codec->extradata_size= icodec->extradata_size;
2850             codec->bits_per_coded_sample  = icodec->bits_per_coded_sample;
2851
2852             codec->time_base = ist->st->time_base;
2853             /*
2854              * Avi is a special case here because it supports variable fps but
2855              * having the fps and timebase differe significantly adds quite some
2856              * overhead
2857              */
2858             if(!strcmp(oc->oformat->name, "avi")) {
2859                 if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2860                                  && av_q2d(ist->st->time_base) < 1.0/500
2861                     || copy_tb==0){
2862                     codec->time_base = icodec->time_base;
2863                     codec->time_base.num *= icodec->ticks_per_frame;
2864                     codec->time_base.den *= 2;
2865                     codec->ticks_per_frame = 2;
2866                 }
2867             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2868                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2869                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2870             ) {
2871                 if(   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
2872                                 && av_q2d(ist->st->time_base) < 1.0/500
2873                    || copy_tb==0){
2874                     codec->time_base = icodec->time_base;
2875                     codec->time_base.num *= icodec->ticks_per_frame;
2876                 }
2877             }
2878
2879             if(ost->frame_rate.num)
2880                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
2881
2882             av_reduce(&codec->time_base.num, &codec->time_base.den,
2883                         codec->time_base.num, codec->time_base.den, INT_MAX);
2884
2885             switch (codec->codec_type) {
2886             case AVMEDIA_TYPE_AUDIO:
2887                 if (audio_volume != 256) {
2888                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2889                     exit_program(1);
2890                 }
2891                 codec->channel_layout     = icodec->channel_layout;
2892                 codec->sample_rate        = icodec->sample_rate;
2893                 codec->channels           = icodec->channels;
2894                 codec->frame_size         = icodec->frame_size;
2895                 codec->audio_service_type = icodec->audio_service_type;
2896                 codec->block_align        = icodec->block_align;
2897                 if(codec->block_align == 1 && codec->codec_id == CODEC_ID_MP3)
2898                     codec->block_align= 0;
2899                 if(codec->codec_id == CODEC_ID_AC3)
2900                     codec->block_align= 0;
2901                 break;
2902             case AVMEDIA_TYPE_VIDEO:
2903                 codec->pix_fmt            = icodec->pix_fmt;
2904                 codec->width              = icodec->width;
2905                 codec->height             = icodec->height;
2906                 codec->has_b_frames       = icodec->has_b_frames;
2907                 if (!codec->sample_aspect_ratio.num) {
2908                     codec->sample_aspect_ratio   =
2909                     ost->st->sample_aspect_ratio =
2910                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2911                         ist->st->codec->sample_aspect_ratio.num ?
2912                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2913                 }
2914                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2915                 break;
2916             case AVMEDIA_TYPE_SUBTITLE:
2917                 codec->width  = icodec->width;
2918                 codec->height = icodec->height;
2919                 break;
2920             case AVMEDIA_TYPE_DATA:
2921             case AVMEDIA_TYPE_ATTACHMENT:
2922                 break;
2923             default:
2924                 abort();
2925             }
2926         } else {
2927             if (!ost->enc)
2928                 ost->enc = avcodec_find_encoder(codec->codec_id);
2929             if (!ost->enc) {
2930                 /* should only happen when a default codec is not present. */
2931                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
2932                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
2933                 ret = AVERROR(EINVAL);
2934                 goto dump_format;
2935             }
2936
2937             if (ist)
2938                 ist->decoding_needed = 1;
2939             ost->encoding_needed = 1;
2940
2941             if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2942                 if (ost->filter && !ost->frame_rate.num)
2943                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
2944                 if (ist && !ost->frame_rate.num)
2945                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
2946                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2947                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2948                     ost->frame_rate = ost->enc->supported_framerates[idx];
2949                 }
2950             }
2951
2952             if (!ost->filter &&
2953                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2954                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2955                     FilterGraph *fg;
2956                     fg = init_simple_filtergraph(ist, ost);
2957                     if (configure_filtergraph(fg)) {
2958                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2959                         exit(1);
2960                     }
2961             }
2962
2963             switch (codec->codec_type) {
2964             case AVMEDIA_TYPE_AUDIO:
2965                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2966                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2967                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2968                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
2969                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2970                 break;
2971             case AVMEDIA_TYPE_VIDEO:
2972                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
2973                 if (ost->filter && !(codec->time_base.num && codec->time_base.den))
2974                     codec->time_base = ost->filter->filter->inputs[0]->time_base;
2975                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
2976                    && (video_sync_method == VSYNC_CFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
2977                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
2978                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
2979                 }
2980                 for (j = 0; j < ost->forced_kf_count; j++)
2981                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
2982                                                          AV_TIME_BASE_Q,
2983                                                          codec->time_base);
2984
2985                 codec->width  = ost->filter->filter->inputs[0]->w;
2986                 codec->height = ost->filter->filter->inputs[0]->h;
2987                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2988                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
2989                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
2990                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2991                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2992
2993                 if (!icodec ||
2994                     codec->width   != icodec->width  ||
2995                     codec->height  != icodec->height ||
2996                     codec->pix_fmt != icodec->pix_fmt) {
2997                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
2998                 }
2999
3000                 break;
3001             case AVMEDIA_TYPE_SUBTITLE:
3002                 codec->time_base = (AVRational){1, 1000};
3003                 break;
3004             default:
3005                 abort();
3006                 break;
3007             }
3008             /* two pass mode */
3009             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
3010                 char logfilename[1024];
3011                 FILE *f;
3012
3013                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
3014                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
3015                          i);
3016                 if (!strcmp(ost->enc->name, "libx264")) {
3017                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
3018                 } else {
3019                     if (codec->flags & CODEC_FLAG_PASS2) {
3020                         char  *logbuffer;
3021                         size_t logbuffer_size;
3022                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
3023                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
3024                                    logfilename);
3025                             exit_program(1);
3026                         }
3027                         codec->stats_in = logbuffer;
3028                     }
3029                     if (codec->flags & CODEC_FLAG_PASS1) {
3030                         f = fopen(logfilename, "wb");
3031                         if (!f) {
3032                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
3033                                 logfilename, strerror(errno));
3034                             exit_program(1);
3035                         }
3036                         ost->logfile = f;
3037                     }
3038                 }
3039             }
3040         }
3041     }
3042
3043     /* open each encoder */
3044     for (i = 0; i < nb_output_streams; i++) {
3045         ost = output_streams[i];
3046         if (ost->encoding_needed) {
3047             AVCodec      *codec = ost->enc;
3048             AVCodecContext *dec = NULL;
3049
3050             if ((ist = get_input_stream(ost)))
3051                 dec = ist->st->codec;
3052             if (dec && dec->subtitle_header) {
3053                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
3054                 if (!ost->st->codec->subtitle_header) {
3055                     ret = AVERROR(ENOMEM);
3056                     goto dump_format;
3057                 }
3058                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
3059                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
3060             }
3061             if (!av_dict_get(ost->opts, "threads", NULL, 0))
3062                 av_dict_set(&ost->opts, "threads", "auto", 0);
3063             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
3064                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
3065                         ost->file_index, ost->index);
3066                 ret = AVERROR(EINVAL);
3067                 goto dump_format;
3068             }
3069             assert_codec_experimental(ost->st->codec, 1);
3070             assert_avoptions(ost->opts);
3071             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
3072                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
3073                                              " It takes bits/s as argument, not kbits/s\n");
3074             extra_size += ost->st->codec->extradata_size;
3075
3076             if (ost->st->codec->me_threshold)
3077                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
3078         }
3079     }
3080
3081     /* init input streams */
3082     for (i = 0; i < nb_input_streams; i++)
3083         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
3084             goto dump_format;
3085
3086     /* discard unused programs */
3087     for (i = 0; i < nb_input_files; i++) {
3088         InputFile *ifile = input_files[i];
3089         for (j = 0; j < ifile->ctx->nb_programs; j++) {
3090             AVProgram *p = ifile->ctx->programs[j];
3091             int discard  = AVDISCARD_ALL;
3092
3093             for (k = 0; k < p->nb_stream_indexes; k++)
3094                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
3095                     discard = AVDISCARD_DEFAULT;
3096                     break;
3097                 }
3098             p->discard = discard;
3099         }
3100     }
3101
3102     /* open files and write file headers */
3103     for (i = 0; i < nb_output_files; i++) {
3104         oc = output_files[i]->ctx;
3105         oc->interrupt_callback = int_cb;
3106         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
3107             char errbuf[128];
3108             const char *errbuf_ptr = errbuf;
3109             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
3110                 errbuf_ptr = strerror(AVUNERROR(ret));
3111             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
3112             ret = AVERROR(EINVAL);
3113             goto dump_format;
3114         }
3115 //         assert_avoptions(output_files[i]->opts);
3116         if (strcmp(oc->oformat->name, "rtp")) {
3117             want_sdp = 0;
3118         }
3119     }
3120
3121  dump_format:
3122     /* dump the file output parameters - cannot be done before in case
3123        of stream copy */
3124     for (i = 0; i < nb_output_files; i++) {
3125         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
3126     }
3127
3128     /* dump the stream mapping */
3129     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
3130     for (i = 0; i < nb_input_streams; i++) {
3131         ist = input_streams[i];
3132
3133         for (j = 0; j < ist->nb_filters; j++) {
3134             if (ist->filters[j]->graph->graph_desc) {
3135                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
3136                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
3137                        ist->filters[j]->name);
3138                 if (nb_filtergraphs > 1)
3139                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
3140                 av_log(NULL, AV_LOG_INFO, "\n");
3141             }
3142         }
3143     }
3144
3145     for (i = 0; i < nb_output_streams; i++) {
3146         ost = output_streams[i];
3147
3148         if (ost->attachment_filename) {
3149             /* an attached file */
3150             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
3151                    ost->attachment_filename, ost->file_index, ost->index);
3152             continue;
3153         }
3154
3155         if (ost->filter && ost->filter->graph->graph_desc) {
3156             /* output from a complex graph */
3157             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
3158             if (nb_filtergraphs > 1)
3159                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
3160
3161             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
3162                    ost->index, ost->enc ? ost->enc->name : "?");
3163             continue;
3164         }
3165
3166         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
3167                input_streams[ost->source_index]->file_index,
3168                input_streams[ost->source_index]->st->index,
3169                ost->file_index,
3170                ost->index);
3171         if (ost->sync_ist != input_streams[ost->source_index])
3172             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
3173                    ost->sync_ist->file_index,
3174                    ost->sync_ist->st->index);
3175         if (ost->stream_copy)
3176             av_log(NULL, AV_LOG_INFO, " (copy)");
3177         else
3178             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
3179                    input_streams[ost->source_index]->dec->name : "?",
3180                    ost->enc ? ost->enc->name : "?");
3181         av_log(NULL, AV_LOG_INFO, "\n");
3182     }
3183
3184     if (ret) {
3185         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
3186         return ret;
3187     }
3188
3189     if (want_sdp) {
3190         print_sdp();
3191     }
3192
3193     return 0;
3194 }
3195
3196 /**
3197  * @return 1 if there are still streams where more output is wanted,
3198  *         0 otherwise
3199  */
3200 static int need_output(void)
3201 {
3202     int i;
3203
3204     for (i = 0; i < nb_output_streams; i++) {
3205         OutputStream *ost    = output_streams[i];
3206         OutputFile *of       = output_files[ost->file_index];
3207         AVFormatContext *os  = output_files[ost->file_index]->ctx;
3208
3209         if (ost->is_past_recording_time ||
3210             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3211             continue;
3212         if (ost->frame_number >= ost->max_frames) {
3213             int j;
3214             for (j = 0; j < of->ctx->nb_streams; j++)
3215                 output_streams[of->ost_index + j]->is_past_recording_time = 1;
3216             continue;
3217         }
3218
3219         return 1;
3220     }
3221
3222     return 0;
3223 }
3224
3225 static int select_input_file(uint8_t *no_packet)
3226 {
3227     int64_t ipts_min = INT64_MAX;
3228     int i, file_index = -1;
3229
3230     for (i = 0; i < nb_input_streams; i++) {
3231         InputStream *ist = input_streams[i];
3232         int64_t ipts     = ist->pts;
3233
3234         if (ist->discard || no_packet[ist->file_index])
3235             continue;
3236         if (!input_files[ist->file_index]->eof_reached) {
3237             if (ipts < ipts_min) {
3238                 ipts_min = ipts;
3239                 file_index = ist->file_index;
3240             }
3241         }
3242     }
3243
3244     return file_index;
3245 }
3246
3247 static int check_keyboard_interaction(int64_t cur_time)
3248 {
3249     int i, ret, key;
3250     static int64_t last_time;
3251     if (received_nb_signals)
3252         return AVERROR_EXIT;
3253     /* read_key() returns 0 on EOF */
3254     if(cur_time - last_time >= 100000 && !run_as_daemon){
3255         key =  read_key();
3256         last_time = cur_time;
3257     }else
3258         key = -1;
3259     if (key == 'q')
3260         return AVERROR_EXIT;
3261     if (key == '+') av_log_set_level(av_log_get_level()+10);
3262     if (key == '-') av_log_set_level(av_log_get_level()-10);
3263     if (key == 's') qp_hist     ^= 1;
3264     if (key == 'h'){
3265         if (do_hex_dump){
3266             do_hex_dump = do_pkt_dump = 0;
3267         } else if(do_pkt_dump){
3268             do_hex_dump = 1;
3269         } else
3270             do_pkt_dump = 1;
3271         av_log_set_level(AV_LOG_DEBUG);
3272     }
3273     if (key == 'c' || key == 'C'){
3274         char buf[4096], target[64], command[256], arg[256] = {0};
3275         double time;
3276         int k, n = 0;
3277         fprintf(stderr, "\nEnter command: <target> <time> <command>[ <argument>]\n");
3278         i = 0;
3279         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3280             if (k > 0)
3281                 buf[i++] = k;
3282         buf[i] = 0;
3283         if (k > 0 &&
3284             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
3285             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
3286                    target, time, command, arg);
3287             for (i = 0; i < nb_filtergraphs; i++) {
3288                 FilterGraph *fg = filtergraphs[i];
3289                 if (fg->graph) {
3290                     if (time < 0) {
3291                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
3292                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
3293                         fprintf(stderr, "Command reply for stream %d: ret:%d res:%s\n", i, ret, buf);
3294                     } else {
3295                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
3296                     }
3297                 }
3298             }
3299         } else {
3300             av_log(NULL, AV_LOG_ERROR,
3301                    "Parse error, at least 3 arguments were expected, "
3302                    "only %d given in string '%s'\n", n, buf);
3303         }
3304     }
3305     if (key == 'd' || key == 'D'){
3306         int debug=0;
3307         if(key == 'D') {
3308             debug = input_streams[0]->st->codec->debug<<1;
3309             if(!debug) debug = 1;
3310             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
3311                 debug += debug;
3312         }else
3313             if(scanf("%d", &debug)!=1)
3314                 fprintf(stderr,"error parsing debug value\n");
3315         for(i=0;i<nb_input_streams;i++) {
3316             input_streams[i]->st->codec->debug = debug;
3317         }
3318         for(i=0;i<nb_output_streams;i++) {
3319             OutputStream *ost = output_streams[i];
3320             ost->st->codec->debug = debug;
3321         }
3322         if(debug) av_log_set_level(AV_LOG_DEBUG);
3323         fprintf(stderr,"debug=%d\n", debug);
3324     }
3325     if (key == '?'){
3326         fprintf(stderr, "key    function\n"
3327                         "?      show this help\n"
3328                         "+      increase verbosity\n"
3329                         "-      decrease verbosity\n"
3330                         "c      Send command to filtergraph\n"
3331                         "D      cycle through available debug modes\n"
3332                         "h      dump packets/hex press to cycle through the 3 states\n"
3333                         "q      quit\n"
3334                         "s      Show QP histogram\n"
3335         );
3336     }
3337     return 0;
3338 }
3339
3340 #if HAVE_PTHREADS
3341 static void *input_thread(void *arg)
3342 {
3343     InputFile *f = arg;
3344     int ret = 0;
3345
3346     while (!transcoding_finished && ret >= 0) {
3347         AVPacket pkt;
3348         ret = av_read_frame(f->ctx, &pkt);
3349
3350         if (ret == AVERROR(EAGAIN)) {
3351             av_usleep(10000);
3352             ret = 0;
3353             continue;
3354         } else if (ret < 0)
3355             break;
3356
3357         pthread_mutex_lock(&f->fifo_lock);
3358         while (!av_fifo_space(f->fifo))
3359             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
3360
3361         av_dup_packet(&pkt);
3362         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
3363
3364         pthread_mutex_unlock(&f->fifo_lock);
3365     }
3366
3367     f->finished = 1;
3368     return NULL;
3369 }
3370
3371 static void free_input_threads(void)
3372 {
3373     int i;
3374
3375     if (nb_input_files == 1)
3376         return;
3377
3378     transcoding_finished = 1;
3379
3380     for (i = 0; i < nb_input_files; i++) {
3381         InputFile *f = input_files[i];
3382         AVPacket pkt;
3383
3384         if (!f->fifo || f->joined)
3385             continue;
3386
3387         pthread_mutex_lock(&f->fifo_lock);
3388         while (av_fifo_size(f->fifo)) {
3389             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
3390             av_free_packet(&pkt);
3391         }
3392         pthread_cond_signal(&f->fifo_cond);
3393         pthread_mutex_unlock(&f->fifo_lock);
3394
3395         pthread_join(f->thread, NULL);
3396         f->joined = 1;
3397
3398         while (av_fifo_size(f->fifo)) {
3399             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
3400             av_free_packet(&pkt);
3401         }
3402         av_fifo_free(f->fifo);
3403     }
3404 }
3405
3406 static int init_input_threads(void)
3407 {
3408     int i, ret;
3409
3410     if (nb_input_files == 1)
3411         return 0;
3412
3413     for (i = 0; i < nb_input_files; i++) {
3414         InputFile *f = input_files[i];
3415
3416         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
3417             return AVERROR(ENOMEM);
3418
3419         pthread_mutex_init(&f->fifo_lock, NULL);
3420         pthread_cond_init (&f->fifo_cond, NULL);
3421
3422         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
3423             return AVERROR(ret);
3424     }
3425     return 0;
3426 }
3427
3428 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
3429 {
3430     int ret = 0;
3431
3432     pthread_mutex_lock(&f->fifo_lock);
3433
3434     if (av_fifo_size(f->fifo)) {
3435         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
3436         pthread_cond_signal(&f->fifo_cond);
3437     } else {
3438         if (f->finished)
3439             ret = AVERROR_EOF;
3440         else
3441             ret = AVERROR(EAGAIN);
3442     }
3443
3444     pthread_mutex_unlock(&f->fifo_lock);
3445
3446     return ret;
3447 }
3448 #endif
3449
3450 static int get_input_packet(InputFile *f, AVPacket *pkt)
3451 {
3452 #if HAVE_PTHREADS
3453     if (nb_input_files > 1)
3454         return get_input_packet_mt(f, pkt);
3455 #endif
3456     return av_read_frame(f->ctx, pkt);
3457 }
3458
3459 /*
3460  * The following code is the main loop of the file converter
3461  */
3462 static int transcode(void)
3463 {
3464     int ret, i;
3465     AVFormatContext *is, *os;
3466     OutputStream *ost;
3467     InputStream *ist;
3468     uint8_t *no_packet;
3469     int no_packet_count = 0;
3470     int64_t timer_start;
3471
3472     if (!(no_packet = av_mallocz(nb_input_files)))
3473         exit_program(1);
3474
3475     ret = transcode_init();
3476     if (ret < 0)
3477         goto fail;
3478
3479     if (!using_stdin) {
3480         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
3481     }
3482
3483     timer_start = av_gettime();
3484
3485 #if HAVE_PTHREADS
3486     if ((ret = init_input_threads()) < 0)
3487         goto fail;
3488 #endif
3489
3490     for (; received_sigterm == 0;) {
3491         int file_index, ist_index;
3492         AVPacket pkt;
3493         int64_t cur_time= av_gettime();
3494
3495         /* if 'q' pressed, exits */
3496         if (!using_stdin)
3497             if (check_keyboard_interaction(cur_time) < 0)
3498                 break;
3499
3500         /* check if there's any stream where output is still needed */
3501         if (!need_output()) {
3502             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
3503             break;
3504         }
3505
3506         /* select the stream that we must read now */
3507         file_index = select_input_file(no_packet);
3508         /* if none, if is finished */
3509         if (file_index < 0) {
3510             if (no_packet_count) {
3511                 no_packet_count = 0;
3512                 memset(no_packet, 0, nb_input_files);
3513                 av_usleep(10000);
3514                 continue;
3515             }
3516             av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
3517             break;
3518         }
3519
3520         is  = input_files[file_index]->ctx;
3521         ret = get_input_packet(input_files[file_index], &pkt);
3522
3523         if (ret == AVERROR(EAGAIN)) {
3524             no_packet[file_index] = 1;
3525             no_packet_count++;
3526             continue;
3527         }
3528         if (ret < 0) {
3529             input_files[file_index]->eof_reached = 1;
3530
3531             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
3532                 ist = input_streams[input_files[file_index]->ist_index + i];
3533                 if (ist->decoding_needed)
3534                     output_packet(ist, NULL);
3535             }
3536
3537             if (opt_shortest)
3538                 break;
3539             else
3540                 continue;
3541         }
3542
3543         no_packet_count = 0;
3544         memset(no_packet, 0, nb_input_files);
3545
3546         if (do_pkt_dump) {
3547             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3548                              is->streams[pkt.stream_index]);
3549         }
3550         /* the following test is needed in case new streams appear
3551            dynamically in stream : we ignore them */
3552         if (pkt.stream_index >= input_files[file_index]->nb_streams)
3553             goto discard_packet;
3554         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
3555         ist = input_streams[ist_index];
3556         if (ist->discard)
3557             goto discard_packet;
3558
3559         if (pkt.dts != AV_NOPTS_VALUE)
3560             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3561         if (pkt.pts != AV_NOPTS_VALUE)
3562             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3563
3564         if (pkt.pts != AV_NOPTS_VALUE)
3565             pkt.pts *= ist->ts_scale;
3566         if (pkt.dts != AV_NOPTS_VALUE)
3567             pkt.dts *= ist->ts_scale;
3568
3569         if (debug_ts) {
3570             av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
3571                     "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",
3572                     ist_index, av_get_media_type_string(ist->st->codec->codec_type),
3573                     av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &ist->st->time_base),
3574                     av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &ist->st->time_base),
3575                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3576                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3577                     input_files[ist->file_index]->ts_offset);
3578         }
3579
3580         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE && !copy_ts) {
3581             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3582             int64_t delta   = pkt_dts - ist->next_dts;
3583             if (is->iformat->flags & AVFMT_TS_DISCONT) {
3584             if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3585                 (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3586                  ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3587                 pkt_dts+1<ist->pts){
3588                 input_files[ist->file_index]->ts_offset -= delta;
3589                 av_log(NULL, AV_LOG_DEBUG,
3590                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3591                        delta, input_files[ist->file_index]->ts_offset);
3592                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3593                 if (pkt.pts != AV_NOPTS_VALUE)
3594                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3595             }
3596             } else {
3597                 if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3598                     (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3599                      pkt_dts+1<ist->pts){
3600                     av_log(NULL, AV_LOG_WARNING, "DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n", pkt.dts, ist->next_dts, pkt.stream_index);
3601                     pkt.dts = AV_NOPTS_VALUE;
3602                 }
3603                 if (pkt.pts != AV_NOPTS_VALUE){
3604                     int64_t pkt_pts = av_rescale_q(pkt.pts, ist->st->time_base, AV_TIME_BASE_Q);
3605                     delta   = pkt_pts - ist->next_dts;
3606                     if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3607                         (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3608                         pkt_pts+1<ist->pts) {
3609                         av_log(NULL, AV_LOG_WARNING, "PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n", pkt.pts, ist->next_dts, pkt.stream_index);
3610                         pkt.pts = AV_NOPTS_VALUE;
3611                     }
3612                 }
3613             }
3614         }
3615
3616         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
3617         if ((ret = output_packet(ist, &pkt)) < 0 ||
3618             ((ret = poll_filters()) < 0 && ret != AVERROR_EOF)) {
3619             char buf[128];
3620             av_strerror(ret, buf, sizeof(buf));
3621             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d: %s\n",
3622                    ist->file_index, ist->st->index, buf);
3623             if (exit_on_error)
3624                 exit_program(1);
3625             av_free_packet(&pkt);
3626             continue;
3627         }
3628
3629     discard_packet:
3630         av_free_packet(&pkt);
3631
3632         /* dump report by using the output first video and audio streams */
3633         print_report(0, timer_start, cur_time);
3634     }
3635 #if HAVE_PTHREADS
3636     free_input_threads();
3637 #endif
3638
3639     /* at the end of stream, we must flush the decoder buffers */
3640     for (i = 0; i < nb_input_streams; i++) {
3641         ist = input_streams[i];
3642         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3643             output_packet(ist, NULL);
3644         }
3645     }
3646     poll_filters();
3647     flush_encoders();
3648
3649     term_exit();
3650
3651     /* write the trailer if needed and close file */
3652     for (i = 0; i < nb_output_files; i++) {
3653         os = output_files[i]->ctx;
3654         av_write_trailer(os);
3655     }
3656
3657     /* dump report by using the first video and audio streams */
3658     print_report(1, timer_start, av_gettime());
3659
3660     /* close each encoder */
3661     for (i = 0; i < nb_output_streams; i++) {
3662         ost = output_streams[i];
3663         if (ost->encoding_needed) {
3664             av_freep(&ost->st->codec->stats_in);
3665             avcodec_close(ost->st->codec);
3666         }
3667     }
3668
3669     /* close each decoder */
3670     for (i = 0; i < nb_input_streams; i++) {
3671         ist = input_streams[i];
3672         if (ist->decoding_needed) {
3673             avcodec_close(ist->st->codec);
3674         }
3675     }
3676
3677     /* finished ! */
3678     ret = 0;
3679
3680  fail:
3681     av_freep(&no_packet);
3682 #if HAVE_PTHREADS
3683     free_input_threads();
3684 #endif
3685
3686     if (output_streams) {
3687         for (i = 0; i < nb_output_streams; i++) {
3688             ost = output_streams[i];
3689             if (ost) {
3690                 if (ost->stream_copy)
3691                     av_freep(&ost->st->codec->extradata);
3692                 if (ost->logfile) {
3693                     fclose(ost->logfile);
3694                     ost->logfile = NULL;
3695                 }
3696                 av_freep(&ost->st->codec->subtitle_header);
3697                 av_free(ost->forced_kf_pts);
3698                 av_dict_free(&ost->opts);
3699             }
3700         }
3701     }
3702     return ret;
3703 }
3704
3705 static int opt_frame_crop(const char *opt, const char *arg)
3706 {
3707     av_log(NULL, AV_LOG_FATAL, "Option '%s' has been removed, use the crop filter instead\n", opt);
3708     return AVERROR(EINVAL);
3709 }
3710
3711 static int opt_pad(const char *opt, const char *arg)
3712 {
3713     av_log(NULL, AV_LOG_FATAL, "Option '%s' has been removed, use the pad filter instead\n", opt);
3714     return -1;
3715 }
3716
3717 static int opt_video_channel(const char *opt, const char *arg)
3718 {
3719     av_log(NULL, AV_LOG_WARNING, "This option is deprecated, use -channel.\n");
3720     return opt_default("channel", arg);
3721 }
3722
3723 static int opt_video_standard(const char *opt, const char *arg)
3724 {
3725     av_log(NULL, AV_LOG_WARNING, "This option is deprecated, use -standard.\n");
3726     return opt_default("standard", arg);
3727 }
3728
3729 static int opt_audio_codec(OptionsContext *o, const char *opt, const char *arg)
3730 {
3731     audio_codec_name = arg;
3732     return parse_option(o, "codec:a", arg, options);
3733 }
3734
3735 static int opt_video_codec(OptionsContext *o, const char *opt, const char *arg)
3736 {
3737     video_codec_name = arg;
3738     return parse_option(o, "codec:v", arg, options);
3739 }
3740
3741 static int opt_subtitle_codec(OptionsContext *o, const char *opt, const char *arg)
3742 {
3743     subtitle_codec_name = arg;
3744     return parse_option(o, "codec:s", arg, options);
3745 }
3746
3747 static int opt_data_codec(OptionsContext *o, const char *opt, const char *arg)
3748 {
3749     return parse_option(o, "codec:d", arg, options);
3750 }
3751
3752 static int opt_map(OptionsContext *o, const char *opt, const char *arg)
3753 {
3754     StreamMap *m = NULL;
3755     int i, negative = 0, file_idx;
3756     int sync_file_idx = -1, sync_stream_idx = 0;
3757     char *p, *sync;
3758     char *map;
3759
3760     if (*arg == '-') {
3761         negative = 1;
3762         arg++;
3763     }
3764     map = av_strdup(arg);
3765
3766     /* parse sync stream first, just pick first matching stream */
3767     if (sync = strchr(map, ',')) {
3768         *sync = 0;
3769         sync_file_idx = strtol(sync + 1, &sync, 0);
3770         if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
3771             av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
3772             exit_program(1);
3773         }
3774         if (*sync)
3775             sync++;
3776         for (i = 0; i < input_files[sync_file_idx]->nb_streams; i++)
3777             if (check_stream_specifier(input_files[sync_file_idx]->ctx,
3778                                        input_files[sync_file_idx]->ctx->streams[i], sync) == 1) {
3779                 sync_stream_idx = i;
3780                 break;
3781             }
3782         if (i == input_files[sync_file_idx]->nb_streams) {
3783             av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
3784                                        "match any streams.\n", arg);
3785             exit_program(1);
3786         }
3787     }
3788
3789
3790     if (map[0] == '[') {
3791         /* this mapping refers to lavfi output */
3792         const char *c = map + 1;
3793         o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3794                                     &o->nb_stream_maps, o->nb_stream_maps + 1);
3795         m = &o->stream_maps[o->nb_stream_maps - 1];
3796         m->linklabel = av_get_token(&c, "]");
3797         if (!m->linklabel) {
3798             av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
3799             exit_program(1);
3800         }
3801     } else {
3802         file_idx = strtol(map, &p, 0);
3803         if (file_idx >= nb_input_files || file_idx < 0) {
3804             av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
3805             exit_program(1);
3806         }
3807         if (negative)
3808             /* disable some already defined maps */
3809             for (i = 0; i < o->nb_stream_maps; i++) {
3810                 m = &o->stream_maps[i];
3811                 if (file_idx == m->file_index &&
3812                     check_stream_specifier(input_files[m->file_index]->ctx,
3813                                            input_files[m->file_index]->ctx->streams[m->stream_index],
3814                                            *p == ':' ? p + 1 : p) > 0)
3815                     m->disabled = 1;
3816             }
3817         else
3818             for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
3819                 if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
3820                             *p == ':' ? p + 1 : p) <= 0)
3821                     continue;
3822                 o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3823                                             &o->nb_stream_maps, o->nb_stream_maps + 1);
3824                 m = &o->stream_maps[o->nb_stream_maps - 1];
3825
3826                 m->file_index   = file_idx;
3827                 m->stream_index = i;
3828
3829                 if (sync_file_idx >= 0) {
3830                     m->sync_file_index   = sync_file_idx;
3831                     m->sync_stream_index = sync_stream_idx;
3832                 } else {
3833                     m->sync_file_index   = file_idx;
3834                     m->sync_stream_index = i;
3835                 }
3836             }
3837     }
3838
3839     if (!m) {
3840         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
3841         exit_program(1);
3842     }
3843
3844     av_freep(&map);
3845     return 0;
3846 }
3847
3848 static int opt_attach(OptionsContext *o, const char *opt, const char *arg)
3849 {
3850     o->attachments = grow_array(o->attachments, sizeof(*o->attachments),
3851                                 &o->nb_attachments, o->nb_attachments + 1);
3852     o->attachments[o->nb_attachments - 1] = arg;
3853     return 0;
3854 }
3855
3856 static int opt_map_channel(OptionsContext *o, const char *opt, const char *arg)
3857 {
3858     int n;
3859     AVStream *st;
3860     AudioChannelMap *m;
3861
3862     o->audio_channel_maps =
3863         grow_array(o->audio_channel_maps, sizeof(*o->audio_channel_maps),
3864                    &o->nb_audio_channel_maps, o->nb_audio_channel_maps + 1);
3865     m = &o->audio_channel_maps[o->nb_audio_channel_maps - 1];
3866
3867     /* muted channel syntax */
3868     n = sscanf(arg, "%d:%d.%d", &m->channel_idx, &m->ofile_idx, &m->ostream_idx);
3869     if ((n == 1 || n == 3) && m->channel_idx == -1) {
3870         m->file_idx = m->stream_idx = -1;
3871         if (n == 1)
3872             m->ofile_idx = m->ostream_idx = -1;
3873         return 0;
3874     }
3875
3876     /* normal syntax */
3877     n = sscanf(arg, "%d.%d.%d:%d.%d",
3878                &m->file_idx,  &m->stream_idx, &m->channel_idx,
3879                &m->ofile_idx, &m->ostream_idx);
3880
3881     if (n != 3 && n != 5) {
3882         av_log(NULL, AV_LOG_FATAL, "Syntax error, mapchan usage: "
3883                "[file.stream.channel|-1][:syncfile:syncstream]\n");
3884         exit_program(1);
3885     }
3886
3887     if (n != 5) // only file.stream.channel specified
3888         m->ofile_idx = m->ostream_idx = -1;
3889
3890     /* check input */
3891     if (m->file_idx < 0 || m->file_idx >= nb_input_files) {
3892         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid input file index: %d\n",
3893                m->file_idx);
3894         exit_program(1);
3895     }
3896     if (m->stream_idx < 0 ||
3897         m->stream_idx >= input_files[m->file_idx]->nb_streams) {
3898         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid input file stream index #%d.%d\n",
3899                m->file_idx, m->stream_idx);
3900         exit_program(1);
3901     }
3902     st = input_files[m->file_idx]->ctx->streams[m->stream_idx];
3903     if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
3904         av_log(NULL, AV_LOG_FATAL, "mapchan: stream #%d.%d is not an audio stream.\n",
3905                m->file_idx, m->stream_idx);
3906         exit_program(1);
3907     }
3908     if (m->channel_idx < 0 || m->channel_idx >= st->codec->channels) {
3909         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid audio channel #%d.%d.%d\n",
3910                m->file_idx, m->stream_idx, m->channel_idx);
3911         exit_program(1);
3912     }
3913     return 0;
3914 }
3915
3916 /**
3917  * Parse a metadata specifier in arg.
3918  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
3919  * @param index for type c/p, chapter/program index is written here
3920  * @param stream_spec for type s, the stream specifier is written here
3921  */
3922 static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
3923 {
3924     if (*arg) {
3925         *type = *arg;
3926         switch (*arg) {
3927         case 'g':
3928             break;
3929         case 's':
3930             if (*(++arg) && *arg != ':') {
3931                 av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
3932                 exit_program(1);
3933             }
3934             *stream_spec = *arg == ':' ? arg + 1 : "";
3935             break;
3936         case 'c':
3937         case 'p':
3938             if (*(++arg) == ':')
3939                 *index = strtol(++arg, NULL, 0);
3940             break;
3941         default:
3942             av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
3943             exit_program(1);
3944         }
3945     } else
3946         *type = 'g';
3947 }
3948
3949 static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
3950 {
3951     AVDictionary **meta_in = NULL;
3952     AVDictionary **meta_out = NULL;
3953     int i, ret = 0;
3954     char type_in, type_out;
3955     const char *istream_spec = NULL, *ostream_spec = NULL;
3956     int idx_in = 0, idx_out = 0;
3957
3958     parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
3959     parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
3960
3961     if (!ic) {
3962         if (type_out == 'g' || !*outspec)
3963             o->metadata_global_manual = 1;
3964         if (type_out == 's' || !*outspec)
3965             o->metadata_streams_manual = 1;
3966         if (type_out == 'c' || !*outspec)
3967             o->metadata_chapters_manual = 1;
3968         return 0;
3969     }
3970
3971     if (type_in == 'g' || type_out == 'g')
3972         o->metadata_global_manual = 1;
3973     if (type_in == 's' || type_out == 's')
3974         o->metadata_streams_manual = 1;
3975     if (type_in == 'c' || type_out == 'c')
3976         o->metadata_chapters_manual = 1;
3977
3978 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
3979     if ((index) < 0 || (index) >= (nb_elems)) {\
3980         av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
3981                 (desc), (index));\
3982         exit_program(1);\
3983     }
3984
3985 #define SET_DICT(type, meta, context, index)\
3986         switch (type) {\
3987         case 'g':\
3988             meta = &context->metadata;\
3989             break;\
3990         case 'c':\
3991             METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
3992             meta = &context->chapters[index]->metadata;\
3993             break;\
3994         case 'p':\
3995             METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
3996             meta = &context->programs[index]->metadata;\
3997             break;\
3998         }\
3999
4000     SET_DICT(type_in, meta_in, ic, idx_in);
4001     SET_DICT(type_out, meta_out, oc, idx_out);
4002
4003     /* for input streams choose first matching stream */
4004     if (type_in == 's') {
4005         for (i = 0; i < ic->nb_streams; i++) {
4006             if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
4007                 meta_in = &ic->streams[i]->metadata;
4008                 break;
4009             } else if (ret < 0)
4010                 exit_program(1);
4011         }
4012         if (!meta_in) {
4013             av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
4014             exit_program(1);
4015         }
4016     }
4017
4018     if (type_out == 's') {
4019         for (i = 0; i < oc->nb_streams; i++) {
4020             if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
4021                 meta_out = &oc->streams[i]->metadata;
4022                 av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
4023             } else if (ret < 0)
4024                 exit_program(1);
4025         }
4026     } else
4027         av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
4028
4029     return 0;
4030 }
4031
4032 static int opt_recording_timestamp(OptionsContext *o, const char *opt, const char *arg)
4033 {
4034     char buf[128];
4035     int64_t recording_timestamp = parse_time_or_die(opt, arg, 0) / 1E6;
4036     struct tm time = *gmtime((time_t*)&recording_timestamp);
4037     strftime(buf, sizeof(buf), "creation_time=%FT%T%z", &time);
4038     parse_option(o, "metadata", buf, options);
4039
4040     av_log(NULL, AV_LOG_WARNING, "%s is deprecated, set the 'creation_time' metadata "
4041                                  "tag instead.\n", opt);
4042     return 0;
4043 }
4044
4045 static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
4046 {
4047     const char *codec_string = encoder ? "encoder" : "decoder";
4048     AVCodec *codec;
4049
4050     codec = encoder ?
4051         avcodec_find_encoder_by_name(name) :
4052         avcodec_find_decoder_by_name(name);
4053     if (!codec) {
4054         av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
4055         exit_program(1);
4056     }
4057     if (codec->type != type) {
4058         av_log(NULL, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
4059         exit_program(1);
4060     }
4061     return codec;
4062 }
4063
4064 static AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVStream *st)
4065 {
4066     char *codec_name = NULL;
4067
4068     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
4069     if (codec_name) {
4070         AVCodec *codec = find_codec_or_die(codec_name, st->codec->codec_type, 0);
4071         st->codec->codec_id = codec->id;
4072         return codec;
4073     } else
4074         return avcodec_find_decoder(st->codec->codec_id);
4075 }
4076
4077 /**
4078  * Add all the streams from the given input file to the global
4079  * list of input streams.
4080  */
4081 static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
4082 {
4083     int i;
4084     char *next, *codec_tag = NULL;
4085
4086     for (i = 0; i < ic->nb_streams; i++) {
4087         AVStream *st = ic->streams[i];
4088         AVCodecContext *dec = st->codec;
4089         InputStream *ist = av_mallocz(sizeof(*ist));
4090         char *framerate = NULL;
4091
4092         if (!ist)
4093             exit_program(1);
4094
4095         input_streams = grow_array(input_streams, sizeof(*input_streams), &nb_input_streams, nb_input_streams + 1);
4096         input_streams[nb_input_streams - 1] = ist;
4097
4098         ist->st = st;
4099         ist->file_index = nb_input_files;
4100         ist->discard = 1;
4101         st->discard  = AVDISCARD_ALL;
4102         ist->opts = filter_codec_opts(codec_opts, choose_decoder(o, ic, st), ic, st);
4103
4104         ist->ts_scale = 1.0;
4105         MATCH_PER_STREAM_OPT(ts_scale, dbl, ist->ts_scale, ic, st);
4106
4107         MATCH_PER_STREAM_OPT(codec_tags, str, codec_tag, ic, st);
4108         if (codec_tag) {
4109             uint32_t tag = strtol(codec_tag, &next, 0);
4110             if (*next)
4111                 tag = AV_RL32(codec_tag);
4112             st->codec->codec_tag = tag;
4113         }
4114
4115         ist->dec = choose_decoder(o, ic, st);
4116
4117         switch (dec->codec_type) {
4118         case AVMEDIA_TYPE_VIDEO:
4119             if(!ist->dec)
4120                 ist->dec = avcodec_find_decoder(dec->codec_id);
4121             if (dec->lowres) {
4122                 dec->flags |= CODEC_FLAG_EMU_EDGE;
4123             }
4124
4125             ist->resample_height  = dec->height;
4126             ist->resample_width   = dec->width;
4127             ist->resample_pix_fmt = dec->pix_fmt;
4128
4129             MATCH_PER_STREAM_OPT(frame_rates, str, framerate, ic, st);
4130             if (framerate && av_parse_video_rate(&ist->framerate,
4131                                                  framerate) < 0) {
4132                 av_log(NULL, AV_LOG_ERROR, "Error parsing framerate %s.\n",
4133                        framerate);
4134                 exit_program(1);
4135             }
4136
4137             ist->top_field_first = -1;
4138             MATCH_PER_STREAM_OPT(top_field_first, i, ist->top_field_first, ic, st);
4139
4140             break;
4141         case AVMEDIA_TYPE_AUDIO:
4142             guess_input_channel_layout(ist);
4143
4144             ist->resample_sample_fmt     = dec->sample_fmt;
4145             ist->resample_sample_rate    = dec->sample_rate;
4146             ist->resample_channels       = dec->channels;
4147             ist->resample_channel_layout = dec->channel_layout;
4148
4149             break;
4150         case AVMEDIA_TYPE_DATA:
4151         case AVMEDIA_TYPE_SUBTITLE:
4152             if(!ist->dec)
4153                 ist->dec = avcodec_find_decoder(dec->codec_id);
4154             break;
4155         case AVMEDIA_TYPE_ATTACHMENT:
4156         case AVMEDIA_TYPE_UNKNOWN:
4157             break;
4158         default:
4159             abort();
4160         }
4161     }
4162 }
4163
4164 static void assert_file_overwrite(const char *filename)
4165 {
4166     if ((!file_overwrite || no_file_overwrite) &&
4167         (strchr(filename, ':') == NULL || filename[1] == ':' ||
4168          av_strstart(filename, "file:", NULL))) {
4169         if (avio_check(filename, 0) == 0) {
4170             if (!using_stdin && (!no_file_overwrite || file_overwrite)) {
4171                 fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
4172                 fflush(stderr);
4173                 term_exit();
4174                 signal(SIGINT, SIG_DFL);
4175                 if (!read_yesno()) {
4176                     av_log(NULL, AV_LOG_FATAL, "Not overwriting - exiting\n");
4177                     exit_program(1);
4178                 }
4179                 term_init();
4180             }
4181             else {
4182                 av_log(NULL, AV_LOG_FATAL, "File '%s' already exists. Exiting.\n", filename);
4183                 exit_program(1);
4184             }
4185         }
4186     }
4187 }
4188
4189 static void dump_attachment(AVStream *st, const char *filename)
4190 {
4191     int ret;
4192     AVIOContext *out = NULL;
4193     AVDictionaryEntry *e;
4194
4195     if (!st->codec->extradata_size) {
4196         av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
4197                nb_input_files - 1, st->index);
4198         return;
4199     }
4200     if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
4201         filename = e->value;
4202     if (!*filename) {
4203         av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
4204                "in stream #%d:%d.\n", nb_input_files - 1, st->index);
4205         exit_program(1);
4206     }
4207
4208     assert_file_overwrite(filename);
4209
4210     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
4211         av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
4212                filename);
4213         exit_program(1);
4214     }
4215
4216     avio_write(out, st->codec->extradata, st->codec->extradata_size);
4217     avio_flush(out);
4218     avio_close(out);
4219 }
4220
4221 static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
4222 {
4223     AVFormatContext *ic;
4224     AVInputFormat *file_iformat = NULL;
4225     int err, i, ret;
4226     int64_t timestamp;
4227     uint8_t buf[128];
4228     AVDictionary **opts;
4229     int orig_nb_streams;                     // number of streams before avformat_find_stream_info
4230
4231     if (o->format) {
4232         if (!(file_iformat = av_find_input_format(o->format))) {
4233             av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
4234             exit_program(1);
4235         }
4236     }
4237
4238     if (!strcmp(filename, "-"))
4239         filename = "pipe:";
4240
4241     using_stdin |= !strncmp(filename, "pipe:", 5) ||
4242                     !strcmp(filename, "/dev/stdin");
4243
4244     /* get default parameters from command line */
4245     ic = avformat_alloc_context();
4246     if (!ic) {
4247         print_error(filename, AVERROR(ENOMEM));
4248         exit_program(1);
4249     }
4250     if (o->nb_audio_sample_rate) {
4251         snprintf(buf, sizeof(buf), "%d", o->audio_sample_rate[o->nb_audio_sample_rate - 1].u.i);
4252         av_dict_set(&format_opts, "sample_rate", buf, 0);
4253     }
4254     if (o->nb_audio_channels) {
4255         /* because we set audio_channels based on both the "ac" and
4256          * "channel_layout" options, we need to check that the specified
4257          * demuxer actually has the "channels" option before setting it */
4258         if (file_iformat && file_iformat->priv_class &&
4259             av_opt_find(&file_iformat->priv_class, "channels", NULL, 0,
4260                         AV_OPT_SEARCH_FAKE_OBJ)) {
4261             snprintf(buf, sizeof(buf), "%d",
4262                      o->audio_channels[o->nb_audio_channels - 1].u.i);
4263             av_dict_set(&format_opts, "channels", buf, 0);
4264         }
4265     }
4266     if (o->nb_frame_rates) {
4267         /* set the format-level framerate option;
4268          * this is important for video grabbers, e.g. x11 */
4269         if (file_iformat && file_iformat->priv_class &&
4270             av_opt_find(&file_iformat->priv_class, "framerate", NULL, 0,
4271                         AV_OPT_SEARCH_FAKE_OBJ)) {
4272             av_dict_set(&format_opts, "framerate",
4273                         o->frame_rates[o->nb_frame_rates - 1].u.str, 0);
4274         }
4275     }
4276     if (o->nb_frame_sizes) {
4277         av_dict_set(&format_opts, "video_size", o->frame_sizes[o->nb_frame_sizes - 1].u.str, 0);
4278     }
4279     if (o->nb_frame_pix_fmts)
4280         av_dict_set(&format_opts, "pixel_format", o->frame_pix_fmts[o->nb_frame_pix_fmts - 1].u.str, 0);
4281
4282     ic->video_codec_id   = video_codec_name ?