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