intfloat: Don't use designated initializers in the public headers
[ffmpeg.git] / avconv.c
1 /*
2  * avconv main
3  * Copyright (c) 2000-2011 The libav developers.
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 #include "config.h"
23 #include <ctype.h>
24 #include <string.h>
25 #include <math.h>
26 #include <stdlib.h>
27 #include <errno.h>
28 #include <signal.h>
29 #include <limits.h>
30 #include "libavformat/avformat.h"
31 #include "libavdevice/avdevice.h"
32 #include "libswscale/swscale.h"
33 #include "libavresample/avresample.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/audioconvert.h"
36 #include "libavutil/parseutils.h"
37 #include "libavutil/samplefmt.h"
38 #include "libavutil/colorspace.h"
39 #include "libavutil/fifo.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/dict.h"
42 #include "libavutil/mathematics.h"
43 #include "libavutil/pixdesc.h"
44 #include "libavutil/avstring.h"
45 #include "libavutil/libm.h"
46 #include "libavutil/imgutils.h"
47 #include "libavutil/time.h"
48 #include "libavformat/os_support.h"
49
50 # include "libavfilter/avfilter.h"
51 # include "libavfilter/avfiltergraph.h"
52 # include "libavfilter/buffersrc.h"
53 # include "libavfilter/buffersink.h"
54
55 #if HAVE_SYS_RESOURCE_H
56 #include <sys/types.h>
57 #include <sys/resource.h>
58 #elif HAVE_GETPROCESSTIMES
59 #include <windows.h>
60 #endif
61 #if HAVE_GETPROCESSMEMORYINFO
62 #include <windows.h>
63 #include <psapi.h>
64 #endif
65
66 #if HAVE_SYS_SELECT_H
67 #include <sys/select.h>
68 #endif
69
70 #if HAVE_PTHREADS
71 #include <pthread.h>
72 #endif
73
74 #include <time.h>
75
76 #include "cmdutils.h"
77
78 #include "libavutil/avassert.h"
79
80 #define VSYNC_AUTO       -1
81 #define VSYNC_PASSTHROUGH 0
82 #define VSYNC_CFR         1
83 #define VSYNC_VFR         2
84
85 const char program_name[] = "avconv";
86 const int program_birth_year = 2000;
87
88 /* select an input stream for an output stream */
89 typedef struct StreamMap {
90     int disabled;           /** 1 is this mapping is disabled by a negative map */
91     int file_index;
92     int stream_index;
93     int sync_file_index;
94     int sync_stream_index;
95     char *linklabel;       /** name of an output link, for mapping lavfi outputs */
96 } StreamMap;
97
98 /**
99  * select an input file for an output file
100  */
101 typedef struct MetadataMap {
102     int  file;      ///< file index
103     char type;      ///< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
104     int  index;     ///< stream/chapter/program number
105 } MetadataMap;
106
107 static const OptionDef options[];
108
109 static int video_discard = 0;
110 static int same_quant = 0;
111 static int do_deinterlace = 0;
112 static int intra_dc_precision = 8;
113 static int qp_hist = 0;
114
115 static int file_overwrite = 0;
116 static int do_benchmark = 0;
117 static int do_hex_dump = 0;
118 static int do_pkt_dump = 0;
119 static int do_pass = 0;
120 static char *pass_logfilename_prefix = NULL;
121 static int video_sync_method = VSYNC_AUTO;
122 static int audio_sync_method = 0;
123 static float audio_drift_threshold = 0.1;
124 static int copy_ts = 0;
125 static int copy_tb = 1;
126 static int opt_shortest = 0;
127 static char *vstats_filename;
128 static FILE *vstats_file;
129
130 static int audio_volume = 256;
131
132 static int exit_on_error = 0;
133 static int using_stdin = 0;
134 static int64_t video_size = 0;
135 static int64_t audio_size = 0;
136 static int64_t extra_size = 0;
137 static int nb_frames_dup = 0;
138 static int nb_frames_drop = 0;
139 static int input_sync;
140
141 static float dts_delta_threshold = 10;
142
143 static int print_stats = 1;
144
145 #if HAVE_PTHREADS
146 /* signal to input threads that they should exit; set by the main thread */
147 static int transcoding_finished;
148 #endif
149
150 #define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
151
152 typedef struct InputFilter {
153     AVFilterContext    *filter;
154     struct InputStream *ist;
155     struct FilterGraph *graph;
156     uint8_t            *name;
157 } InputFilter;
158
159 typedef struct OutputFilter {
160     AVFilterContext     *filter;
161     struct OutputStream *ost;
162     struct FilterGraph  *graph;
163     uint8_t             *name;
164
165     /* temporary storage until stream maps are processed */
166     AVFilterInOut       *out_tmp;
167 } OutputFilter;
168
169 typedef struct FilterGraph {
170     int            index;
171     const char    *graph_desc;
172
173     AVFilterGraph *graph;
174
175     InputFilter   **inputs;
176     int          nb_inputs;
177     OutputFilter **outputs;
178     int         nb_outputs;
179 } FilterGraph;
180
181 typedef struct InputStream {
182     int file_index;
183     AVStream *st;
184     int discard;             /* true if stream data should be discarded */
185     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
186     AVCodec *dec;
187     AVFrame *decoded_frame;
188
189     int64_t       start;     /* time when read started */
190     /* predicted dts of the next packet read for this stream or (when there are
191      * several frames in a packet) of the next frame in current packet */
192     int64_t       next_dts;
193     /* dts of the last packet read for this stream */
194     int64_t       last_dts;
195     PtsCorrectionContext pts_ctx;
196     double ts_scale;
197     int is_start;            /* is 1 at the start and after a discontinuity */
198     int showed_multi_packet_warning;
199     AVDictionary *opts;
200     AVRational framerate;               /* framerate forced with -r */
201
202     int resample_height;
203     int resample_width;
204     int resample_pix_fmt;
205
206     int      resample_sample_fmt;
207     int      resample_sample_rate;
208     int      resample_channels;
209     uint64_t resample_channel_layout;
210
211     /* a pool of free buffers for decoded data */
212     FrameBuffer *buffer_pool;
213
214     /* decoded data from this stream goes into all those filters
215      * currently video and audio only */
216     InputFilter **filters;
217     int        nb_filters;
218 } InputStream;
219
220 typedef struct InputFile {
221     AVFormatContext *ctx;
222     int eof_reached;      /* true if eof reached */
223     int ist_index;        /* index of first stream in ist_table */
224     int buffer_size;      /* current total buffer size */
225     int64_t ts_offset;
226     int nb_streams;       /* number of stream that avconv is aware of; may be different
227                              from ctx.nb_streams if new streams appear during av_read_frame() */
228     int rate_emu;
229
230 #if HAVE_PTHREADS
231     pthread_t thread;           /* thread reading from this file */
232     int finished;               /* the thread has exited */
233     int joined;                 /* the thread has been joined */
234     pthread_mutex_t fifo_lock;  /* lock for access to fifo */
235     pthread_cond_t  fifo_cond;  /* the main thread will signal on this cond after reading from fifo */
236     AVFifoBuffer *fifo;         /* demuxed packets are stored here; freed by the main thread */
237 #endif
238 } InputFile;
239
240 typedef struct OutputStream {
241     int file_index;          /* file index */
242     int index;               /* stream index in the output file */
243     int source_index;        /* InputStream index */
244     AVStream *st;            /* stream in the output file */
245     int encoding_needed;     /* true if encoding needed for this stream */
246     int frame_number;
247     /* input pts and corresponding output pts
248        for A/V sync */
249     // double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
250     struct InputStream *sync_ist; /* input stream to sync against */
251     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
252     /* pts of the first frame encoded for this stream, used for limiting
253      * recording time */
254     int64_t first_pts;
255     AVBitStreamFilterContext *bitstream_filters;
256     AVCodec *enc;
257     int64_t max_frames;
258     AVFrame *filtered_frame;
259
260     /* video only */
261     AVRational frame_rate;
262     int force_fps;
263     int top_field_first;
264
265     float frame_aspect_ratio;
266     float last_quality;
267
268     /* forced key frames */
269     int64_t *forced_kf_pts;
270     int forced_kf_count;
271     int forced_kf_index;
272     char *forced_keyframes;
273
274     FILE *logfile;
275
276     OutputFilter *filter;
277     char *avfilter;
278
279     int64_t sws_flags;
280     AVDictionary *opts;
281     int is_past_recording_time;
282     int stream_copy;
283     const char *attachment_filename;
284     int copy_initial_nonkeyframes;
285
286     enum PixelFormat pix_fmts[2];
287 } OutputStream;
288
289
290 typedef struct OutputFile {
291     AVFormatContext *ctx;
292     AVDictionary *opts;
293     int ost_index;       /* index of the first stream in output_streams */
294     int64_t recording_time; /* desired length of the resulting file in microseconds */
295     int64_t start_time;     /* start time in microseconds */
296     uint64_t limit_filesize;
297 } OutputFile;
298
299 static InputStream **input_streams = NULL;
300 static int        nb_input_streams = 0;
301 static InputFile   **input_files   = NULL;
302 static int        nb_input_files   = 0;
303
304 static OutputStream **output_streams = NULL;
305 static int         nb_output_streams = 0;
306 static OutputFile   **output_files   = NULL;
307 static int         nb_output_files   = 0;
308
309 static FilterGraph **filtergraphs;
310 int               nb_filtergraphs;
311
312 typedef struct OptionsContext {
313     /* input/output options */
314     int64_t start_time;
315     const char *format;
316
317     SpecifierOpt *codec_names;
318     int        nb_codec_names;
319     SpecifierOpt *audio_channels;
320     int        nb_audio_channels;
321     SpecifierOpt *audio_sample_rate;
322     int        nb_audio_sample_rate;
323     SpecifierOpt *frame_rates;
324     int        nb_frame_rates;
325     SpecifierOpt *frame_sizes;
326     int        nb_frame_sizes;
327     SpecifierOpt *frame_pix_fmts;
328     int        nb_frame_pix_fmts;
329
330     /* input options */
331     int64_t input_ts_offset;
332     int rate_emu;
333
334     SpecifierOpt *ts_scale;
335     int        nb_ts_scale;
336     SpecifierOpt *dump_attachment;
337     int        nb_dump_attachment;
338
339     /* output options */
340     StreamMap *stream_maps;
341     int     nb_stream_maps;
342     /* first item specifies output metadata, second is input */
343     MetadataMap (*meta_data_maps)[2];
344     int nb_meta_data_maps;
345     int metadata_global_manual;
346     int metadata_streams_manual;
347     int metadata_chapters_manual;
348     const char **attachments;
349     int       nb_attachments;
350
351     int chapters_input_file;
352
353     int64_t recording_time;
354     uint64_t limit_filesize;
355     float mux_preload;
356     float mux_max_delay;
357
358     int video_disable;
359     int audio_disable;
360     int subtitle_disable;
361     int data_disable;
362
363     /* indexed by output file stream index */
364     int   *streamid_map;
365     int nb_streamid_map;
366
367     SpecifierOpt *metadata;
368     int        nb_metadata;
369     SpecifierOpt *max_frames;
370     int        nb_max_frames;
371     SpecifierOpt *bitstream_filters;
372     int        nb_bitstream_filters;
373     SpecifierOpt *codec_tags;
374     int        nb_codec_tags;
375     SpecifierOpt *sample_fmts;
376     int        nb_sample_fmts;
377     SpecifierOpt *qscale;
378     int        nb_qscale;
379     SpecifierOpt *forced_key_frames;
380     int        nb_forced_key_frames;
381     SpecifierOpt *force_fps;
382     int        nb_force_fps;
383     SpecifierOpt *frame_aspect_ratios;
384     int        nb_frame_aspect_ratios;
385     SpecifierOpt *rc_overrides;
386     int        nb_rc_overrides;
387     SpecifierOpt *intra_matrices;
388     int        nb_intra_matrices;
389     SpecifierOpt *inter_matrices;
390     int        nb_inter_matrices;
391     SpecifierOpt *top_field_first;
392     int        nb_top_field_first;
393     SpecifierOpt *metadata_map;
394     int        nb_metadata_map;
395     SpecifierOpt *presets;
396     int        nb_presets;
397     SpecifierOpt *copy_initial_nonkeyframes;
398     int        nb_copy_initial_nonkeyframes;
399     SpecifierOpt *filters;
400     int        nb_filters;
401 } OptionsContext;
402
403 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
404 {\
405     int i, ret;\
406     for (i = 0; i < o->nb_ ## name; i++) {\
407         char *spec = o->name[i].specifier;\
408         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
409             outvar = o->name[i].u.type;\
410         else if (ret < 0)\
411             exit_program(1);\
412     }\
413 }
414
415 static void reset_options(OptionsContext *o)
416 {
417     const OptionDef *po = options;
418     int i;
419
420     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
421     while (po->name) {
422         void *dst = (uint8_t*)o + po->u.off;
423
424         if (po->flags & OPT_SPEC) {
425             SpecifierOpt **so = dst;
426             int i, *count = (int*)(so + 1);
427             for (i = 0; i < *count; i++) {
428                 av_freep(&(*so)[i].specifier);
429                 if (po->flags & OPT_STRING)
430                     av_freep(&(*so)[i].u.str);
431             }
432             av_freep(so);
433             *count = 0;
434         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
435             av_freep(dst);
436         po++;
437     }
438
439     for (i = 0; i < o->nb_stream_maps; i++)
440         av_freep(&o->stream_maps[i].linklabel);
441     av_freep(&o->stream_maps);
442     av_freep(&o->meta_data_maps);
443     av_freep(&o->streamid_map);
444
445     memset(o, 0, sizeof(*o));
446
447     o->mux_max_delay  = 0.7;
448     o->recording_time = INT64_MAX;
449     o->limit_filesize = UINT64_MAX;
450     o->chapters_input_file = INT_MAX;
451
452     uninit_opts();
453     init_opts();
454 }
455
456 /**
457  * Define a function for building a string containing a list of
458  * allowed formats,
459  */
460 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator) \
461 static char *choose_ ## var ## s(OutputStream *ost)                             \
462 {                                                                               \
463     if (ost->st->codec->var != none) {                                          \
464         get_name(ost->st->codec->var);                                          \
465         return av_strdup(name);                                                 \
466     } else if (ost->enc->supported_list) {                                      \
467         const type *p;                                                          \
468         AVIOContext *s = NULL;                                                  \
469         uint8_t *ret;                                                           \
470         int len;                                                                \
471                                                                                 \
472         if (avio_open_dyn_buf(&s) < 0)                                          \
473             exit_program(1);                                                    \
474                                                                                 \
475         for (p = ost->enc->supported_list; *p != none; p++) {                   \
476             get_name(*p);                                                       \
477             avio_printf(s, "%s" separator, name);                               \
478         }                                                                       \
479         len = avio_close_dyn_buf(s, &ret);                                      \
480         ret[len - 1] = 0;                                                       \
481         return ret;                                                             \
482     } else                                                                      \
483         return NULL;                                                            \
484 }
485
486 #define GET_PIX_FMT_NAME(pix_fmt)\
487     const char *name = av_get_pix_fmt_name(pix_fmt);
488
489 DEF_CHOOSE_FORMAT(enum PixelFormat, pix_fmt, pix_fmts, PIX_FMT_NONE,
490                   GET_PIX_FMT_NAME, ":")
491
492 #define GET_SAMPLE_FMT_NAME(sample_fmt)\
493     const char *name = av_get_sample_fmt_name(sample_fmt)
494
495 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
496                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME, ",")
497
498 #define GET_SAMPLE_RATE_NAME(rate)\
499     char name[16];\
500     snprintf(name, sizeof(name), "%d", rate);
501
502 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
503                   GET_SAMPLE_RATE_NAME, ",")
504
505 #define GET_CH_LAYOUT_NAME(ch_layout)\
506     char name[16];\
507     snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
508
509 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
510                   GET_CH_LAYOUT_NAME, ",")
511
512 static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
513 {
514     FilterGraph *fg = av_mallocz(sizeof(*fg));
515
516     if (!fg)
517         exit_program(1);
518     fg->index = nb_filtergraphs;
519
520     fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
521                              fg->nb_outputs + 1);
522     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
523         exit_program(1);
524     fg->outputs[0]->ost   = ost;
525     fg->outputs[0]->graph = fg;
526
527     ost->filter = fg->outputs[0];
528
529     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
530                             fg->nb_inputs + 1);
531     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
532         exit_program(1);
533     fg->inputs[0]->ist   = ist;
534     fg->inputs[0]->graph = fg;
535
536     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
537                               &ist->nb_filters, ist->nb_filters + 1);
538     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
539
540     filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
541                               &nb_filtergraphs, nb_filtergraphs + 1);
542     filtergraphs[nb_filtergraphs - 1] = fg;
543
544     return fg;
545 }
546
547 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
548 {
549     InputStream *ist = NULL;
550     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
551     int i;
552
553     // TODO: support other filter types
554     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
555         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
556                "currently.\n");
557         exit_program(1);
558     }
559
560     if (in->name) {
561         AVFormatContext *s;
562         AVStream       *st = NULL;
563         char *p;
564         int file_idx = strtol(in->name, &p, 0);
565
566         if (file_idx < 0 || file_idx >= nb_input_files) {
567             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtegraph description %s.\n",
568                    file_idx, fg->graph_desc);
569             exit_program(1);
570         }
571         s = input_files[file_idx]->ctx;
572
573         for (i = 0; i < s->nb_streams; i++) {
574             if (s->streams[i]->codec->codec_type != type)
575                 continue;
576             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
577                 st = s->streams[i];
578                 break;
579             }
580         }
581         if (!st) {
582             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
583                    "matches no streams.\n", p, fg->graph_desc);
584             exit_program(1);
585         }
586         ist = input_streams[input_files[file_idx]->ist_index + st->index];
587     } else {
588         /* find the first unused stream of corresponding type */
589         for (i = 0; i < nb_input_streams; i++) {
590             ist = input_streams[i];
591             if (ist->st->codec->codec_type == type && ist->discard)
592                 break;
593         }
594         if (i == nb_input_streams) {
595             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
596                    "unlabeled input pad %d on filter %s", in->pad_idx,
597                    in->filter_ctx->name);
598             exit_program(1);
599         }
600     }
601     av_assert0(ist);
602
603     ist->discard         = 0;
604     ist->decoding_needed = 1;
605     ist->st->discard = AVDISCARD_NONE;
606
607     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
608                             &fg->nb_inputs, fg->nb_inputs + 1);
609     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
610         exit_program(1);
611     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
612     fg->inputs[fg->nb_inputs - 1]->graph = fg;
613
614     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
615                               &ist->nb_filters, ist->nb_filters + 1);
616     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
617 }
618
619 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
620 {
621     char *pix_fmts;
622     OutputStream *ost = ofilter->ost;
623     AVCodecContext *codec = ost->st->codec;
624     AVFilterContext *last_filter = out->filter_ctx;
625     int pad_idx = out->pad_idx;
626     int ret;
627     char name[255];
628
629     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
630     ret = avfilter_graph_create_filter(&ofilter->filter,
631                                        avfilter_get_by_name("buffersink"),
632                                        name, NULL, pix_fmts, fg->graph);
633     if (ret < 0)
634         return ret;
635
636     if (codec->width || codec->height) {
637         char args[255];
638         AVFilterContext *filter;
639
640         snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
641                  codec->width,
642                  codec->height,
643                  (unsigned)ost->sws_flags);
644         snprintf(name, sizeof(name), "scaler for output stream %d:%d",
645                  ost->file_index, ost->index);
646         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
647                                                 name, args, NULL, fg->graph)) < 0)
648             return ret;
649         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
650             return ret;
651
652         last_filter = filter;
653         pad_idx = 0;
654     }
655
656     if ((pix_fmts = choose_pix_fmts(ost))) {
657         AVFilterContext *filter;
658         snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
659                  ost->file_index, ost->index);
660         if ((ret = avfilter_graph_create_filter(&filter,
661                                                 avfilter_get_by_name("format"),
662                                                 "format", pix_fmts, NULL,
663                                                 fg->graph)) < 0)
664             return ret;
665         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
666             return ret;
667
668         last_filter = filter;
669         pad_idx     = 0;
670         av_freep(&pix_fmts);
671     }
672
673     if (ost->frame_rate.num) {
674         AVFilterContext *fps;
675         char args[255];
676
677         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
678                  ost->frame_rate.den);
679         snprintf(name, sizeof(name), "fps for output stream %d:%d",
680                  ost->file_index, ost->index);
681         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
682                                            name, args, NULL, fg->graph);
683         if (ret < 0)
684             return ret;
685
686         ret = avfilter_link(last_filter, pad_idx, fps, 0);
687         if (ret < 0)
688             return ret;
689         last_filter = fps;
690         pad_idx = 0;
691     }
692
693     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
694         return ret;
695
696     return 0;
697 }
698
699 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
700 {
701     OutputStream *ost = ofilter->ost;
702     AVCodecContext *codec  = ost->st->codec;
703     AVFilterContext *last_filter = out->filter_ctx;
704     int pad_idx = out->pad_idx;
705     char *sample_fmts, *sample_rates, *channel_layouts;
706     char name[255];
707     int ret;
708
709
710     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
711     ret = avfilter_graph_create_filter(&ofilter->filter,
712                                        avfilter_get_by_name("abuffersink"),
713                                        name, NULL, NULL, fg->graph);
714     if (ret < 0)
715         return ret;
716
717     if (codec->channels && !codec->channel_layout)
718         codec->channel_layout = av_get_default_channel_layout(codec->channels);
719
720     sample_fmts     = choose_sample_fmts(ost);
721     sample_rates    = choose_sample_rates(ost);
722     channel_layouts = choose_channel_layouts(ost);
723     if (sample_fmts || sample_rates || channel_layouts) {
724         AVFilterContext *format;
725         char args[256];
726         int len = 0;
727
728         if (sample_fmts)
729             len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
730                             sample_fmts);
731         if (sample_rates)
732             len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
733                             sample_rates);
734         if (channel_layouts)
735             len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
736                             channel_layouts);
737         args[len - 1] = 0;
738
739         av_freep(&sample_fmts);
740         av_freep(&sample_rates);
741         av_freep(&channel_layouts);
742
743         snprintf(name, sizeof(name), "audio format for output stream %d:%d",
744                  ost->file_index, ost->index);
745         ret = avfilter_graph_create_filter(&format,
746                                            avfilter_get_by_name("aformat"),
747                                            name, args, NULL, fg->graph);
748         if (ret < 0)
749             return ret;
750
751         ret = avfilter_link(last_filter, pad_idx, format, 0);
752         if (ret < 0)
753             return ret;
754
755         last_filter = format;
756         pad_idx = 0;
757     }
758
759     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
760         return ret;
761
762     return 0;
763 }
764
765 #define DESCRIBE_FILTER_LINK(f, inout, in)                         \
766 {                                                                  \
767     AVFilterContext *ctx = inout->filter_ctx;                      \
768     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;  \
769     int       nb_pads = in ? ctx->input_count : ctx->output_count; \
770     AVIOContext *pb;                                               \
771                                                                    \
772     if (avio_open_dyn_buf(&pb) < 0)                                \
773         exit_program(1);                                           \
774                                                                    \
775     avio_printf(pb, "%s", ctx->filter->name);                      \
776     if (nb_pads > 1)                                               \
777         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
778     avio_w8(pb, 0);                                                \
779     avio_close_dyn_buf(pb, &f->name);                              \
780 }
781
782 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
783 {
784     av_freep(&ofilter->name);
785     DESCRIBE_FILTER_LINK(ofilter, out, 0);
786
787     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
788     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
789     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
790     default: av_assert0(0);
791     }
792 }
793
794 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
795                                         AVFilterInOut *in)
796 {
797     AVFilterContext *first_filter = in->filter_ctx;
798     AVFilter *filter = avfilter_get_by_name("buffer");
799     InputStream *ist = ifilter->ist;
800     AVRational tb = ist->framerate.num ? (AVRational){ist->framerate.den,
801                                                       ist->framerate.num} :
802                                          ist->st->time_base;
803     AVRational sar;
804     char args[255], name[255];
805     int pad_idx = in->pad_idx;
806     int ret;
807
808     sar = ist->st->sample_aspect_ratio.num ?
809           ist->st->sample_aspect_ratio :
810           ist->st->codec->sample_aspect_ratio;
811     snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
812              ist->st->codec->height, ist->st->codec->pix_fmt,
813              tb.num, tb.den, sar.num, sar.den);
814     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
815              ist->file_index, ist->st->index);
816
817     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, name,
818                                             args, NULL, fg->graph)) < 0)
819         return ret;
820
821     if (ist->framerate.num) {
822         AVFilterContext *setpts;
823
824         snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
825                  ist->file_index, ist->st->index);
826         if ((ret = avfilter_graph_create_filter(&setpts,
827                                                 avfilter_get_by_name("setpts"),
828                                                 name, "N", NULL,
829                                                 fg->graph)) < 0)
830             return ret;
831
832         if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0)
833             return ret;
834
835         first_filter = setpts;
836         pad_idx = 0;
837     }
838
839     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
840         return ret;
841     return 0;
842 }
843
844 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
845                                         AVFilterInOut *in)
846 {
847     AVFilterContext *first_filter = in->filter_ctx;
848     AVFilter *filter = avfilter_get_by_name("abuffer");
849     InputStream *ist = ifilter->ist;
850     int pad_idx = in->pad_idx;
851     char args[255], name[255];
852     int ret;
853
854     snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s"
855              ":channel_layout=0x%"PRIx64,
856              ist->st->time_base.num, ist->st->time_base.den,
857              ist->st->codec->sample_rate,
858              av_get_sample_fmt_name(ist->st->codec->sample_fmt),
859              ist->st->codec->channel_layout);
860     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
861              ist->file_index, ist->st->index);
862
863     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter,
864                                             name, args, NULL,
865                                             fg->graph)) < 0)
866         return ret;
867
868     if (audio_sync_method > 0) {
869         AVFilterContext *async;
870         char args[256];
871         int  len = 0;
872
873         av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
874                "asyncts audio filter instead.\n");
875
876         if (audio_sync_method > 1)
877             len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
878                             "max_comp=%d:", audio_sync_method);
879         snprintf(args + len, sizeof(args) - len, "min_delta=%f",
880                  audio_drift_threshold);
881
882         snprintf(name, sizeof(name), "graph %d audio sync for input stream %d:%d",
883                  fg->index, ist->file_index, ist->st->index);
884         ret = avfilter_graph_create_filter(&async,
885                                            avfilter_get_by_name("asyncts"),
886                                            name, args, NULL, fg->graph);
887         if (ret < 0)
888             return ret;
889
890         ret = avfilter_link(async, 0, first_filter, pad_idx);
891         if (ret < 0)
892             return ret;
893
894         first_filter = async;
895         pad_idx = 0;
896     }
897     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
898         return ret;
899
900     return 0;
901 }
902
903 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
904                                   AVFilterInOut *in)
905 {
906     av_freep(&ifilter->name);
907     DESCRIBE_FILTER_LINK(ifilter, in, 1);
908
909     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
910     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
911     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
912     default: av_assert0(0);
913     }
914 }
915
916 static int configure_filtergraph(FilterGraph *fg)
917 {
918     AVFilterInOut *inputs, *outputs, *cur;
919     int ret, i, init = !fg->graph, simple = !fg->graph_desc;
920     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
921                                       fg->graph_desc;
922
923     avfilter_graph_free(&fg->graph);
924     if (!(fg->graph = avfilter_graph_alloc()))
925         return AVERROR(ENOMEM);
926
927     if (simple) {
928         OutputStream *ost = fg->outputs[0]->ost;
929         char args[255];
930         snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
931         fg->graph->scale_sws_opts = av_strdup(args);
932     }
933
934     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
935         return ret;
936
937     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
938         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
939                "exactly one input and output.\n", graph_desc);
940         return AVERROR(EINVAL);
941     }
942
943     for (cur = inputs; !simple && init && cur; cur = cur->next)
944         init_input_filter(fg, cur);
945
946     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
947         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
948             return ret;
949     avfilter_inout_free(&inputs);
950
951     if (!init || simple) {
952         /* we already know the mappings between lavfi outputs and output streams,
953          * so we can finish the setup */
954         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
955             configure_output_filter(fg, fg->outputs[i], cur);
956         avfilter_inout_free(&outputs);
957
958         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
959             return ret;
960     } else {
961         /* wait until output mappings are processed */
962         for (cur = outputs; cur;) {
963             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
964                                      &fg->nb_outputs, fg->nb_outputs + 1);
965             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
966                 exit_program(1);
967             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
968             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
969             cur = cur->next;
970             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
971         }
972     }
973
974     return 0;
975 }
976
977 static int configure_complex_filters(void)
978 {
979     int i, ret = 0;
980
981     for (i = 0; i < nb_filtergraphs; i++)
982         if (!filtergraphs[i]->graph &&
983             (ret = configure_filtergraph(filtergraphs[i])) < 0)
984             return ret;
985     return 0;
986 }
987
988 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
989 {
990     int i;
991     for (i = 0; i < fg->nb_inputs; i++)
992         if (fg->inputs[i]->ist == ist)
993             return 1;
994     return 0;
995 }
996
997 static void term_exit(void)
998 {
999     av_log(NULL, AV_LOG_QUIET, "");
1000 }
1001
1002 static volatile int received_sigterm = 0;
1003 static volatile int received_nb_signals = 0;
1004
1005 static void
1006 sigterm_handler(int sig)
1007 {
1008     received_sigterm = sig;
1009     received_nb_signals++;
1010     term_exit();
1011 }
1012
1013 static void term_init(void)
1014 {
1015     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1016     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1017 #ifdef SIGXCPU
1018     signal(SIGXCPU, sigterm_handler);
1019 #endif
1020 }
1021
1022 static int decode_interrupt_cb(void *ctx)
1023 {
1024     return received_nb_signals > 1;
1025 }
1026
1027 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1028
1029 void exit_program(int ret)
1030 {
1031     int i, j;
1032
1033     for (i = 0; i < nb_filtergraphs; i++) {
1034         avfilter_graph_free(&filtergraphs[i]->graph);
1035         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
1036             av_freep(&filtergraphs[i]->inputs[j]->name);
1037             av_freep(&filtergraphs[i]->inputs[j]);
1038         }
1039         av_freep(&filtergraphs[i]->inputs);
1040         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
1041             av_freep(&filtergraphs[i]->outputs[j]->name);
1042             av_freep(&filtergraphs[i]->outputs[j]);
1043         }
1044         av_freep(&filtergraphs[i]->outputs);
1045         av_freep(&filtergraphs[i]);
1046     }
1047     av_freep(&filtergraphs);
1048
1049     /* close files */
1050     for (i = 0; i < nb_output_files; i++) {
1051         AVFormatContext *s = output_files[i]->ctx;
1052         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1053             avio_close(s->pb);
1054         avformat_free_context(s);
1055         av_dict_free(&output_files[i]->opts);
1056         av_freep(&output_files[i]);
1057     }
1058     for (i = 0; i < nb_output_streams; i++) {
1059         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1060         while (bsfc) {
1061             AVBitStreamFilterContext *next = bsfc->next;
1062             av_bitstream_filter_close(bsfc);
1063             bsfc = next;
1064         }
1065         output_streams[i]->bitstream_filters = NULL;
1066
1067         av_freep(&output_streams[i]->forced_keyframes);
1068         av_freep(&output_streams[i]->avfilter);
1069         av_freep(&output_streams[i]->filtered_frame);
1070         av_freep(&output_streams[i]);
1071     }
1072     for (i = 0; i < nb_input_files; i++) {
1073         avformat_close_input(&input_files[i]->ctx);
1074         av_freep(&input_files[i]);
1075     }
1076     for (i = 0; i < nb_input_streams; i++) {
1077         av_freep(&input_streams[i]->decoded_frame);
1078         av_dict_free(&input_streams[i]->opts);
1079         free_buffer_pool(&input_streams[i]->buffer_pool);
1080         av_freep(&input_streams[i]->filters);
1081         av_freep(&input_streams[i]);
1082     }
1083
1084     if (vstats_file)
1085         fclose(vstats_file);
1086     av_free(vstats_filename);
1087
1088     av_freep(&input_streams);
1089     av_freep(&input_files);
1090     av_freep(&output_streams);
1091     av_freep(&output_files);
1092
1093     uninit_opts();
1094
1095     avfilter_uninit();
1096     avformat_network_deinit();
1097
1098     if (received_sigterm) {
1099         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1100                (int) received_sigterm);
1101         exit (255);
1102     }
1103
1104     exit(ret);
1105 }
1106
1107 static void assert_avoptions(AVDictionary *m)
1108 {
1109     AVDictionaryEntry *t;
1110     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1111         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1112         exit_program(1);
1113     }
1114 }
1115
1116 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1117 {
1118     const char *codec_string = encoder ? "encoder" : "decoder";
1119     AVCodec *codec;
1120     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1121         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1122         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1123                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1124                 codec_string, c->codec->name);
1125         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1126         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1127             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1128                    codec_string, codec->name);
1129         exit_program(1);
1130     }
1131 }
1132
1133 /**
1134  * Update the requested input sample format based on the output sample format.
1135  * This is currently only used to request float output from decoders which
1136  * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
1137  * Ideally this will be removed in the future when decoders do not do format
1138  * conversion and only output in their native format.
1139  */
1140 static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
1141                               AVCodecContext *enc)
1142 {
1143     /* if sample formats match or a decoder sample format has already been
1144        requested, just return */
1145     if (enc->sample_fmt == dec->sample_fmt ||
1146         dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
1147         return;
1148
1149     /* if decoder supports more than one output format */
1150     if (dec_codec && dec_codec->sample_fmts &&
1151         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
1152         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
1153         const enum AVSampleFormat *p;
1154         int min_dec = -1, min_inc = -1;
1155
1156         /* find a matching sample format in the encoder */
1157         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
1158             if (*p == enc->sample_fmt) {
1159                 dec->request_sample_fmt = *p;
1160                 return;
1161             } else if (*p > enc->sample_fmt) {
1162                 min_inc = FFMIN(min_inc, *p - enc->sample_fmt);
1163             } else
1164                 min_dec = FFMIN(min_dec, enc->sample_fmt - *p);
1165         }
1166
1167         /* if none match, provide the one that matches quality closest */
1168         dec->request_sample_fmt = min_inc > 0 ? enc->sample_fmt + min_inc :
1169                                   enc->sample_fmt - min_dec;
1170     }
1171 }
1172
1173 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1174 {
1175     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1176     AVCodecContext          *avctx = ost->st->codec;
1177     int ret;
1178
1179     /*
1180      * Audio encoders may split the packets --  #frames in != #packets out.
1181      * But there is no reordering, so we can limit the number of output packets
1182      * by simply dropping them here.
1183      * Counting encoded video frames needs to be done separately because of
1184      * reordering, see do_video_out()
1185      */
1186     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1187         if (ost->frame_number >= ost->max_frames) {
1188             av_free_packet(pkt);
1189             return;
1190         }
1191         ost->frame_number++;
1192     }
1193
1194     while (bsfc) {
1195         AVPacket new_pkt = *pkt;
1196         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1197                                            &new_pkt.data, &new_pkt.size,
1198                                            pkt->data, pkt->size,
1199                                            pkt->flags & AV_PKT_FLAG_KEY);
1200         if (a > 0) {
1201             av_free_packet(pkt);
1202             new_pkt.destruct = av_destruct_packet;
1203         } else if (a < 0) {
1204             av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
1205                    bsfc->filter->name, pkt->stream_index,
1206                    avctx->codec ? avctx->codec->name : "copy");
1207             print_error("", a);
1208             if (exit_on_error)
1209                 exit_program(1);
1210         }
1211         *pkt = new_pkt;
1212
1213         bsfc = bsfc->next;
1214     }
1215
1216     pkt->stream_index = ost->index;
1217     ret = av_interleaved_write_frame(s, pkt);
1218     if (ret < 0) {
1219         print_error("av_interleaved_write_frame()", ret);
1220         exit_program(1);
1221     }
1222 }
1223
1224 static int check_recording_time(OutputStream *ost)
1225 {
1226     OutputFile *of = output_files[ost->file_index];
1227
1228     if (of->recording_time != INT64_MAX &&
1229         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
1230                       AV_TIME_BASE_Q) >= 0) {
1231         ost->is_past_recording_time = 1;
1232         return 0;
1233     }
1234     return 1;
1235 }
1236
1237 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1238                          AVFrame *frame)
1239 {
1240     AVCodecContext *enc = ost->st->codec;
1241     AVPacket pkt;
1242     int got_packet = 0;
1243
1244     av_init_packet(&pkt);
1245     pkt.data = NULL;
1246     pkt.size = 0;
1247
1248     if (!check_recording_time(ost))
1249         return;
1250
1251     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
1252         frame->pts = ost->sync_opts;
1253     ost->sync_opts = frame->pts + frame->nb_samples;
1254
1255     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1256         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
1257         exit_program(1);
1258     }
1259
1260     if (got_packet) {
1261         if (pkt.pts != AV_NOPTS_VALUE)
1262             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1263         if (pkt.dts != AV_NOPTS_VALUE)
1264             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1265         if (pkt.duration > 0)
1266             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1267
1268         write_frame(s, &pkt, ost);
1269
1270         audio_size += pkt.size;
1271     }
1272 }
1273
1274 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1275 {
1276     AVCodecContext *dec;
1277     AVPicture *picture2;
1278     AVPicture picture_tmp;
1279     uint8_t *buf = 0;
1280
1281     dec = ist->st->codec;
1282
1283     /* deinterlace : must be done before any resize */
1284     if (do_deinterlace) {
1285         int size;
1286
1287         /* create temporary picture */
1288         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1289         buf  = av_malloc(size);
1290         if (!buf)
1291             return;
1292
1293         picture2 = &picture_tmp;
1294         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1295
1296         if (avpicture_deinterlace(picture2, picture,
1297                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1298             /* if error, do not deinterlace */
1299             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1300             av_free(buf);
1301             buf = NULL;
1302             picture2 = picture;
1303         }
1304     } else {
1305         picture2 = picture;
1306     }
1307
1308     if (picture != picture2)
1309         *picture = *picture2;
1310     *bufp = buf;
1311 }
1312
1313 static void do_subtitle_out(AVFormatContext *s,
1314                             OutputStream *ost,
1315                             InputStream *ist,
1316                             AVSubtitle *sub,
1317                             int64_t pts)
1318 {
1319     static uint8_t *subtitle_out = NULL;
1320     int subtitle_out_max_size = 1024 * 1024;
1321     int subtitle_out_size, nb, i;
1322     AVCodecContext *enc;
1323     AVPacket pkt;
1324
1325     if (pts == AV_NOPTS_VALUE) {
1326         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1327         if (exit_on_error)
1328             exit_program(1);
1329         return;
1330     }
1331
1332     enc = ost->st->codec;
1333
1334     if (!subtitle_out) {
1335         subtitle_out = av_malloc(subtitle_out_max_size);
1336     }
1337
1338     /* Note: DVB subtitle need one packet to draw them and one other
1339        packet to clear them */
1340     /* XXX: signal it in the codec context ? */
1341     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1342         nb = 2;
1343     else
1344         nb = 1;
1345
1346     for (i = 0; i < nb; i++) {
1347         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1348         if (!check_recording_time(ost))
1349             return;
1350
1351         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1352         // start_display_time is required to be 0
1353         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1354         sub->end_display_time  -= sub->start_display_time;
1355         sub->start_display_time = 0;
1356         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1357                                                     subtitle_out_max_size, sub);
1358         if (subtitle_out_size < 0) {
1359             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1360             exit_program(1);
1361         }
1362
1363         av_init_packet(&pkt);
1364         pkt.data = subtitle_out;
1365         pkt.size = subtitle_out_size;
1366         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1367         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1368             /* XXX: the pts correction is handled here. Maybe handling
1369                it in the codec would be better */
1370             if (i == 0)
1371                 pkt.pts += 90 * sub->start_display_time;
1372             else
1373                 pkt.pts += 90 * sub->end_display_time;
1374         }
1375         write_frame(s, &pkt, ost);
1376     }
1377 }
1378
1379 static void do_video_out(AVFormatContext *s,
1380                          OutputStream *ost,
1381                          AVFrame *in_picture,
1382                          int *frame_size, float quality)
1383 {
1384     int ret, format_video_sync;
1385     AVPacket pkt;
1386     AVCodecContext *enc = ost->st->codec;
1387
1388     *frame_size = 0;
1389
1390     format_video_sync = video_sync_method;
1391     if (format_video_sync == VSYNC_AUTO)
1392         format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
1393                             (s->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
1394     if (format_video_sync != VSYNC_PASSTHROUGH &&
1395         ost->frame_number &&
1396         in_picture->pts != AV_NOPTS_VALUE &&
1397         in_picture->pts < ost->sync_opts) {
1398         nb_frames_drop++;
1399         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1400         return;
1401     }
1402
1403     if (in_picture->pts == AV_NOPTS_VALUE)
1404         in_picture->pts = ost->sync_opts;
1405     ost->sync_opts = in_picture->pts;
1406
1407
1408     if (!ost->frame_number)
1409         ost->first_pts = in_picture->pts;
1410
1411     av_init_packet(&pkt);
1412     pkt.data = NULL;
1413     pkt.size = 0;
1414
1415     if (!check_recording_time(ost) ||
1416         ost->frame_number >= ost->max_frames)
1417         return;
1418
1419     if (s->oformat->flags & AVFMT_RAWPICTURE &&
1420         enc->codec->id == CODEC_ID_RAWVIDEO) {
1421         /* raw pictures are written as AVPicture structure to
1422            avoid any copies. We support temporarily the older
1423            method. */
1424         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1425         enc->coded_frame->top_field_first  = in_picture->top_field_first;
1426         pkt.data   = (uint8_t *)in_picture;
1427         pkt.size   =  sizeof(AVPicture);
1428         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
1429         pkt.flags |= AV_PKT_FLAG_KEY;
1430
1431         write_frame(s, &pkt, ost);
1432     } else {
1433         int got_packet;
1434         AVFrame big_picture;
1435
1436         big_picture = *in_picture;
1437         /* better than nothing: use input picture interlaced
1438            settings */
1439         big_picture.interlaced_frame = in_picture->interlaced_frame;
1440         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1441             if (ost->top_field_first == -1)
1442                 big_picture.top_field_first = in_picture->top_field_first;
1443             else
1444                 big_picture.top_field_first = !!ost->top_field_first;
1445         }
1446
1447         /* handles same_quant here. This is not correct because it may
1448            not be a global option */
1449         big_picture.quality = quality;
1450         if (!enc->me_threshold)
1451             big_picture.pict_type = 0;
1452         if (ost->forced_kf_index < ost->forced_kf_count &&
1453             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1454             big_picture.pict_type = AV_PICTURE_TYPE_I;
1455             ost->forced_kf_index++;
1456         }
1457         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
1458         if (ret < 0) {
1459             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1460             exit_program(1);
1461         }
1462
1463         if (got_packet) {
1464             if (pkt.pts != AV_NOPTS_VALUE)
1465                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1466             if (pkt.dts != AV_NOPTS_VALUE)
1467                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1468
1469             write_frame(s, &pkt, ost);
1470             *frame_size = pkt.size;
1471             video_size += pkt.size;
1472
1473             /* if two pass, output log */
1474             if (ost->logfile && enc->stats_out) {
1475                 fprintf(ost->logfile, "%s", enc->stats_out);
1476             }
1477         }
1478     }
1479     ost->sync_opts++;
1480     /*
1481      * For video, number of frames in == number of packets out.
1482      * But there may be reordering, so we can't throw away frames on encoder
1483      * flush, we need to limit them here, before they go into encoder.
1484      */
1485     ost->frame_number++;
1486 }
1487
1488 static double psnr(double d)
1489 {
1490     return -10.0 * log(d) / log(10.0);
1491 }
1492
1493 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1494                            int frame_size)
1495 {
1496     AVCodecContext *enc;
1497     int frame_number;
1498     double ti1, bitrate, avg_bitrate;
1499
1500     /* this is executed just the first time do_video_stats is called */
1501     if (!vstats_file) {
1502         vstats_file = fopen(vstats_filename, "w");
1503         if (!vstats_file) {
1504             perror("fopen");
1505             exit_program(1);
1506         }
1507     }
1508
1509     enc = ost->st->codec;
1510     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1511         frame_number = ost->frame_number;
1512         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1513         if (enc->flags&CODEC_FLAG_PSNR)
1514             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1515
1516         fprintf(vstats_file,"f_size= %6d ", frame_size);
1517         /* compute pts value */
1518         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1519         if (ti1 < 0.01)
1520             ti1 = 0.01;
1521
1522         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1523         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1524         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1525                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1526         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1527     }
1528 }
1529
1530 /* check for new output on any of the filtergraphs */
1531 static int poll_filters(void)
1532 {
1533     AVFilterBufferRef *picref;
1534     AVFrame *filtered_frame = NULL;
1535     int i, frame_size;
1536
1537     for (i = 0; i < nb_output_streams; i++) {
1538         OutputStream *ost = output_streams[i];
1539         OutputFile    *of = output_files[ost->file_index];
1540         int ret = 0;
1541
1542         if (!ost->filter)
1543             continue;
1544
1545         if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
1546             return AVERROR(ENOMEM);
1547         } else
1548             avcodec_get_frame_defaults(ost->filtered_frame);
1549         filtered_frame = ost->filtered_frame;
1550
1551         while (ret >= 0 && !ost->is_past_recording_time) {
1552             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1553                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1554                 ret = av_buffersink_read_samples(ost->filter->filter, &picref,
1555                                                  ost->st->codec->frame_size);
1556             else
1557                 ret = av_buffersink_read(ost->filter->filter, &picref);
1558
1559             if (ret < 0)
1560                 break;
1561
1562             avfilter_copy_buf_props(filtered_frame, picref);
1563             if (picref->pts != AV_NOPTS_VALUE)
1564                 filtered_frame->pts = av_rescale_q(picref->pts,
1565                                                    ost->filter->filter->inputs[0]->time_base,
1566                                                    ost->st->codec->time_base) -
1567                                       av_rescale_q(of->start_time,
1568                                                    AV_TIME_BASE_Q,
1569                                                    ost->st->codec->time_base);
1570
1571             if (of->start_time && filtered_frame->pts < of->start_time) {
1572                 avfilter_unref_buffer(picref);
1573                 continue;
1574             }
1575
1576             switch (ost->filter->filter->inputs[0]->type) {
1577             case AVMEDIA_TYPE_VIDEO:
1578                 if (!ost->frame_aspect_ratio)
1579                     ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
1580
1581                 do_video_out(of->ctx, ost, filtered_frame, &frame_size,
1582                              same_quant ? ost->last_quality :
1583                                           ost->st->codec->global_quality);
1584                 if (vstats_filename && frame_size)
1585                     do_video_stats(of->ctx, ost, frame_size);
1586                 break;
1587             case AVMEDIA_TYPE_AUDIO:
1588                 do_audio_out(of->ctx, ost, filtered_frame);
1589                 break;
1590             default:
1591                 // TODO support subtitle filters
1592                 av_assert0(0);
1593             }
1594
1595             avfilter_unref_buffer(picref);
1596         }
1597     }
1598     return 0;
1599 }
1600
1601 static void print_report(int is_last_report, int64_t timer_start)
1602 {
1603     char buf[1024];
1604     OutputStream *ost;
1605     AVFormatContext *oc;
1606     int64_t total_size;
1607     AVCodecContext *enc;
1608     int frame_number, vid, i;
1609     double bitrate, ti1, pts;
1610     static int64_t last_time = -1;
1611     static int qp_histogram[52];
1612
1613     if (!print_stats && !is_last_report)
1614         return;
1615
1616     if (!is_last_report) {
1617         int64_t cur_time;
1618         /* display the report every 0.5 seconds */
1619         cur_time = av_gettime();
1620         if (last_time == -1) {
1621             last_time = cur_time;
1622             return;
1623         }
1624         if ((cur_time - last_time) < 500000)
1625             return;
1626         last_time = cur_time;
1627     }
1628
1629
1630     oc = output_files[0]->ctx;
1631
1632     total_size = avio_size(oc->pb);
1633     if (total_size < 0) // FIXME improve avio_size() so it works with non seekable output too
1634         total_size = avio_tell(oc->pb);
1635
1636     buf[0] = '\0';
1637     ti1 = 1e10;
1638     vid = 0;
1639     for (i = 0; i < nb_output_streams; i++) {
1640         float q = -1;
1641         ost = output_streams[i];
1642         enc = ost->st->codec;
1643         if (!ost->stream_copy && enc->coded_frame)
1644             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1645         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1646             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1647         }
1648         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1649             float t = (av_gettime() - timer_start) / 1000000.0;
1650
1651             frame_number = ost->frame_number;
1652             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
1653                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
1654             if (is_last_report)
1655                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1656             if (qp_hist) {
1657                 int j;
1658                 int qp = lrintf(q);
1659                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1660                     qp_histogram[qp]++;
1661                 for (j = 0; j < 32; j++)
1662                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
1663             }
1664             if (enc->flags&CODEC_FLAG_PSNR) {
1665                 int j;
1666                 double error, error_sum = 0;
1667                 double scale, scale_sum = 0;
1668                 char type[3] = { 'Y','U','V' };
1669                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1670                 for (j = 0; j < 3; j++) {
1671                     if (is_last_report) {
1672                         error = enc->error[j];
1673                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1674                     } else {
1675                         error = enc->coded_frame->error[j];
1676                         scale = enc->width * enc->height * 255.0 * 255.0;
1677                     }
1678                     if (j)
1679                         scale /= 4;
1680                     error_sum += error;
1681                     scale_sum += scale;
1682                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
1683                 }
1684                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1685             }
1686             vid = 1;
1687         }
1688         /* compute min output value */
1689         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
1690         if ((pts < ti1) && (pts > 0))
1691             ti1 = pts;
1692     }
1693     if (ti1 < 0.01)
1694         ti1 = 0.01;
1695
1696     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
1697
1698     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1699             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
1700             (double)total_size / 1024, ti1, bitrate);
1701
1702     if (nb_frames_dup || nb_frames_drop)
1703         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1704                 nb_frames_dup, nb_frames_drop);
1705
1706     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1707
1708     fflush(stderr);
1709
1710     if (is_last_report) {
1711         int64_t raw= audio_size + video_size + extra_size;
1712         av_log(NULL, AV_LOG_INFO, "\n");
1713         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
1714                video_size / 1024.0,
1715                audio_size / 1024.0,
1716                extra_size / 1024.0,
1717                100.0 * (total_size - raw) / raw
1718         );
1719     }
1720 }
1721
1722 static void flush_encoders(void)
1723 {
1724     int i, ret;
1725
1726     for (i = 0; i < nb_output_streams; i++) {
1727         OutputStream   *ost = output_streams[i];
1728         AVCodecContext *enc = ost->st->codec;
1729         AVFormatContext *os = output_files[ost->file_index]->ctx;
1730         int stop_encoding = 0;
1731
1732         if (!ost->encoding_needed)
1733             continue;
1734
1735         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1736             continue;
1737         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
1738             continue;
1739
1740         for (;;) {
1741             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1742             const char *desc;
1743             int64_t *size;
1744
1745             switch (ost->st->codec->codec_type) {
1746             case AVMEDIA_TYPE_AUDIO:
1747                 encode = avcodec_encode_audio2;
1748                 desc   = "Audio";
1749                 size   = &audio_size;
1750                 break;
1751             case AVMEDIA_TYPE_VIDEO:
1752                 encode = avcodec_encode_video2;
1753                 desc   = "Video";
1754                 size   = &video_size;
1755                 break;
1756             default:
1757                 stop_encoding = 1;
1758             }
1759
1760             if (encode) {
1761                 AVPacket pkt;
1762                 int got_packet;
1763                 av_init_packet(&pkt);
1764                 pkt.data = NULL;
1765                 pkt.size = 0;
1766
1767                 ret = encode(enc, &pkt, NULL, &got_packet);
1768                 if (ret < 0) {
1769                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1770                     exit_program(1);
1771                 }
1772                 *size += ret;
1773                 if (ost->logfile && enc->stats_out) {
1774                     fprintf(ost->logfile, "%s", enc->stats_out);
1775                 }
1776                 if (!got_packet) {
1777                     stop_encoding = 1;
1778                     break;
1779                 }
1780                 if (pkt.pts != AV_NOPTS_VALUE)
1781                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1782                 if (pkt.dts != AV_NOPTS_VALUE)
1783                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1784                 write_frame(os, &pkt, ost);
1785             }
1786
1787             if (stop_encoding)
1788                 break;
1789         }
1790     }
1791 }
1792
1793 /*
1794  * Check whether a packet from ist should be written into ost at this time
1795  */
1796 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1797 {
1798     OutputFile *of = output_files[ost->file_index];
1799     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1800
1801     if (ost->source_index != ist_index)
1802         return 0;
1803
1804     if (of->start_time && ist->last_dts < of->start_time)
1805         return 0;
1806
1807     return 1;
1808 }
1809
1810 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1811 {
1812     OutputFile *of = output_files[ost->file_index];
1813     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
1814     AVPacket opkt;
1815
1816     av_init_packet(&opkt);
1817
1818     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1819         !ost->copy_initial_nonkeyframes)
1820         return;
1821
1822     if (of->recording_time != INT64_MAX &&
1823         ist->last_dts >= of->recording_time + of->start_time) {
1824         ost->is_past_recording_time = 1;
1825         return;
1826     }
1827
1828     /* force the input stream PTS */
1829     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1830         audio_size += pkt->size;
1831     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1832         video_size += pkt->size;
1833         ost->sync_opts++;
1834     }
1835
1836     if (pkt->pts != AV_NOPTS_VALUE)
1837         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1838     else
1839         opkt.pts = AV_NOPTS_VALUE;
1840
1841     if (pkt->dts == AV_NOPTS_VALUE)
1842         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
1843     else
1844         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1845     opkt.dts -= ost_tb_start_time;
1846
1847     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1848     opkt.flags    = pkt->flags;
1849
1850     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1851     if (  ost->st->codec->codec_id != CODEC_ID_H264
1852        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
1853        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
1854        && ost->st->codec->codec_id != CODEC_ID_VC1
1855        ) {
1856         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1857             opkt.destruct = av_destruct_packet;
1858     } else {
1859         opkt.data = pkt->data;
1860         opkt.size = pkt->size;
1861     }
1862
1863     write_frame(of->ctx, &opkt, ost);
1864     ost->st->codec->frame_number++;
1865     av_free_packet(&opkt);
1866 }
1867
1868 static void rate_emu_sleep(InputStream *ist)
1869 {
1870     if (input_files[ist->file_index]->rate_emu) {
1871         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
1872         int64_t now = av_gettime() - ist->start;
1873         if (pts > now)
1874             av_usleep(pts - now);
1875     }
1876 }
1877
1878 static int guess_input_channel_layout(InputStream *ist)
1879 {
1880     AVCodecContext *dec = ist->st->codec;
1881
1882     if (!dec->channel_layout) {
1883         char layout_name[256];
1884
1885         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1886         if (!dec->channel_layout)
1887             return 0;
1888         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1889                                      dec->channels, dec->channel_layout);
1890         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1891                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1892     }
1893     return 1;
1894 }
1895
1896 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1897 {
1898     AVFrame *decoded_frame;
1899     AVCodecContext *avctx = ist->st->codec;
1900     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
1901     int i, ret, resample_changed;
1902
1903     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1904         return AVERROR(ENOMEM);
1905     else
1906         avcodec_get_frame_defaults(ist->decoded_frame);
1907     decoded_frame = ist->decoded_frame;
1908
1909     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1910     if (ret < 0) {
1911         return ret;
1912     }
1913
1914     if (!*got_output) {
1915         /* no audio frame */
1916         if (!pkt->size)
1917             for (i = 0; i < ist->nb_filters; i++)
1918                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1919         return ret;
1920     }
1921
1922     /* if the decoder provides a pts, use it instead of the last packet pts.
1923        the decoder could be delaying output by a packet or more. */
1924     if (decoded_frame->pts != AV_NOPTS_VALUE)
1925         ist->next_dts = decoded_frame->pts;
1926     else if (pkt->pts != AV_NOPTS_VALUE) {
1927         decoded_frame->pts = pkt->pts;
1928         pkt->pts           = AV_NOPTS_VALUE;
1929     }
1930
1931     // preprocess audio (volume)
1932     if (audio_volume != 256) {
1933         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
1934         void *samples = decoded_frame->data[0];
1935         switch (avctx->sample_fmt) {
1936         case AV_SAMPLE_FMT_U8:
1937         {
1938             uint8_t *volp = samples;
1939             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1940                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
1941                 *volp++ = av_clip_uint8(v);
1942             }
1943             break;
1944         }
1945         case AV_SAMPLE_FMT_S16:
1946         {
1947             int16_t *volp = samples;
1948             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1949                 int v = ((*volp) * audio_volume + 128) >> 8;
1950                 *volp++ = av_clip_int16(v);
1951             }
1952             break;
1953         }
1954         case AV_SAMPLE_FMT_S32:
1955         {
1956             int32_t *volp = samples;
1957             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1958                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
1959                 *volp++ = av_clipl_int32(v);
1960             }
1961             break;
1962         }
1963         case AV_SAMPLE_FMT_FLT:
1964         {
1965             float *volp = samples;
1966             float scale = audio_volume / 256.f;
1967             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1968                 *volp++ *= scale;
1969             }
1970             break;
1971         }
1972         case AV_SAMPLE_FMT_DBL:
1973         {
1974             double *volp = samples;
1975             double scale = audio_volume / 256.;
1976             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1977                 *volp++ *= scale;
1978             }
1979             break;
1980         }
1981         default:
1982             av_log(NULL, AV_LOG_FATAL,
1983                    "Audio volume adjustment on sample format %s is not supported.\n",
1984                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
1985             exit_program(1);
1986         }
1987     }
1988
1989     rate_emu_sleep(ist);
1990
1991     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1992                        ist->resample_channels       != avctx->channels               ||
1993                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1994                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1995     if (resample_changed) {
1996         char layout1[64], layout2[64];
1997
1998         if (!guess_input_channel_layout(ist)) {
1999             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
2000                    "layout for Input Stream #%d.%d\n", ist->file_index,
2001                    ist->st->index);
2002             exit_program(1);
2003         }
2004         decoded_frame->channel_layout = avctx->channel_layout;
2005
2006         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
2007                                      ist->resample_channel_layout);
2008         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
2009                                      decoded_frame->channel_layout);
2010
2011         av_log(NULL, AV_LOG_INFO,
2012                "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",
2013                ist->file_index, ist->st->index,
2014                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2015                ist->resample_channels, layout1,
2016                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2017                avctx->channels, layout2);
2018
2019         ist->resample_sample_fmt     = decoded_frame->format;
2020         ist->resample_sample_rate    = decoded_frame->sample_rate;
2021         ist->resample_channel_layout = decoded_frame->channel_layout;
2022         ist->resample_channels       = avctx->channels;
2023
2024         for (i = 0; i < nb_filtergraphs; i++)
2025             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2026                 configure_filtergraph(filtergraphs[i]) < 0) {
2027                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2028                 exit_program(1);
2029             }
2030     }
2031
2032     for (i = 0; i < ist->nb_filters; i++)
2033         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
2034
2035     return ret;
2036 }
2037
2038 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
2039 {
2040     AVFrame *decoded_frame;
2041     void *buffer_to_free = NULL;
2042     int i, ret = 0, resample_changed;
2043     float quality;
2044
2045     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2046         return AVERROR(ENOMEM);
2047     else
2048         avcodec_get_frame_defaults(ist->decoded_frame);
2049     decoded_frame = ist->decoded_frame;
2050
2051     ret = avcodec_decode_video2(ist->st->codec,
2052                                 decoded_frame, got_output, pkt);
2053     if (ret < 0)
2054         return ret;
2055
2056     quality = same_quant ? decoded_frame->quality : 0;
2057     if (!*got_output) {
2058         /* no picture yet */
2059         if (!pkt->size)
2060             for (i = 0; i < ist->nb_filters; i++)
2061                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
2062         return ret;
2063     }
2064     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
2065                                            decoded_frame->pkt_dts);
2066     pkt->size = 0;
2067     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2068
2069     rate_emu_sleep(ist);
2070
2071     if (ist->st->sample_aspect_ratio.num)
2072         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2073
2074     resample_changed = ist->resample_width   != decoded_frame->width  ||
2075                        ist->resample_height  != decoded_frame->height ||
2076                        ist->resample_pix_fmt != decoded_frame->format;
2077     if (resample_changed) {
2078         av_log(NULL, AV_LOG_INFO,
2079                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2080                ist->file_index, ist->st->index,
2081                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2082                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2083
2084         ist->resample_width   = decoded_frame->width;
2085         ist->resample_height  = decoded_frame->height;
2086         ist->resample_pix_fmt = decoded_frame->format;
2087
2088         for (i = 0; i < nb_filtergraphs; i++)
2089             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2090                 configure_filtergraph(filtergraphs[i]) < 0) {
2091                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2092                 exit_program(1);
2093             }
2094     }
2095
2096     for (i = 0; i < ist->nb_filters; i++) {
2097         // XXX what an ugly hack
2098         if (ist->filters[i]->graph->nb_outputs == 1)
2099             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2100
2101         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
2102             FrameBuffer      *buf = decoded_frame->opaque;
2103             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2104                                         decoded_frame->data, decoded_frame->linesize,
2105                                         AV_PERM_READ | AV_PERM_PRESERVE,
2106                                         ist->st->codec->width, ist->st->codec->height,
2107                                         ist->st->codec->pix_fmt);
2108
2109             avfilter_copy_frame_props(fb, decoded_frame);
2110             fb->buf->priv           = buf;
2111             fb->buf->free           = filter_release_buffer;
2112
2113             buf->refcount++;
2114             av_buffersrc_buffer(ist->filters[i]->filter, fb);
2115         } else
2116             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
2117     }
2118
2119     av_free(buffer_to_free);
2120     return ret;
2121 }
2122
2123 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2124 {
2125     AVSubtitle subtitle;
2126     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2127                                           &subtitle, got_output, pkt);
2128     if (ret < 0)
2129         return ret;
2130     if (!*got_output)
2131         return ret;
2132
2133     rate_emu_sleep(ist);
2134
2135     for (i = 0; i < nb_output_streams; i++) {
2136         OutputStream *ost = output_streams[i];
2137
2138         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2139             continue;
2140
2141         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2142     }
2143
2144     avsubtitle_free(&subtitle);
2145     return ret;
2146 }
2147
2148 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2149 static int output_packet(InputStream *ist, const AVPacket *pkt)
2150 {
2151     int i;
2152     int got_output;
2153     AVPacket avpkt;
2154
2155     if (ist->next_dts == AV_NOPTS_VALUE)
2156         ist->next_dts = ist->last_dts;
2157
2158     if (pkt == NULL) {
2159         /* EOF handling */
2160         av_init_packet(&avpkt);
2161         avpkt.data = NULL;
2162         avpkt.size = 0;
2163         goto handle_eof;
2164     } else {
2165         avpkt = *pkt;
2166     }
2167
2168     if (pkt->dts != AV_NOPTS_VALUE)
2169         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2170
2171     // while we have more to decode or while the decoder did output something on EOF
2172     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2173         int ret = 0;
2174     handle_eof:
2175
2176         ist->last_dts = ist->next_dts;
2177
2178         if (avpkt.size && avpkt.size != pkt->size) {
2179             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2180                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2181             ist->showed_multi_packet_warning = 1;
2182         }
2183
2184         switch (ist->st->codec->codec_type) {
2185         case AVMEDIA_TYPE_AUDIO:
2186             ret = decode_audio    (ist, &avpkt, &got_output);
2187             break;
2188         case AVMEDIA_TYPE_VIDEO:
2189             ret = decode_video    (ist, &avpkt, &got_output);
2190             if (avpkt.duration)
2191                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2192             else if (ist->st->r_frame_rate.num)
2193                 ist->next_dts += av_rescale_q(1, (AVRational){ist->st->r_frame_rate.den,
2194                                                               ist->st->r_frame_rate.num},
2195                                               AV_TIME_BASE_Q);
2196             else if (ist->st->codec->time_base.num != 0) {
2197                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
2198                                                    ist->st->codec->ticks_per_frame;
2199                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
2200             }
2201             break;
2202         case AVMEDIA_TYPE_SUBTITLE:
2203             ret = transcode_subtitles(ist, &avpkt, &got_output);
2204             break;
2205         default:
2206             return -1;
2207         }
2208
2209         if (ret < 0)
2210             return ret;
2211         // touch data and size only if not EOF
2212         if (pkt) {
2213             avpkt.data += ret;
2214             avpkt.size -= ret;
2215         }
2216         if (!got_output) {
2217             continue;
2218         }
2219     }
2220
2221     /* handle stream copy */
2222     if (!ist->decoding_needed) {
2223         rate_emu_sleep(ist);
2224         ist->last_dts = ist->next_dts;
2225         switch (ist->st->codec->codec_type) {
2226         case AVMEDIA_TYPE_AUDIO:
2227             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2228                              ist->st->codec->sample_rate;
2229             break;
2230         case AVMEDIA_TYPE_VIDEO:
2231             if (ist->st->codec->time_base.num != 0) {
2232                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2233                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2234                                   ist->st->codec->time_base.num * ticks) /
2235                                   ist->st->codec->time_base.den;
2236             }
2237             break;
2238         }
2239     }
2240     for (i = 0; pkt && i < nb_output_streams; i++) {
2241         OutputStream *ost = output_streams[i];
2242
2243         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2244             continue;
2245
2246         do_streamcopy(ist, ost, pkt);
2247     }
2248
2249     return 0;
2250 }
2251
2252 static void print_sdp(void)
2253 {
2254     char sdp[2048];
2255     int i;
2256     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2257
2258     if (!avc)
2259         exit_program(1);
2260     for (i = 0; i < nb_output_files; i++)
2261         avc[i] = output_files[i]->ctx;
2262
2263     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2264     printf("SDP:\n%s\n", sdp);
2265     fflush(stdout);
2266     av_freep(&avc);
2267 }
2268
2269 static int init_input_stream(int ist_index, char *error, int error_len)
2270 {
2271     int i;
2272     InputStream *ist = input_streams[ist_index];
2273     if (ist->decoding_needed) {
2274         AVCodec *codec = ist->dec;
2275         if (!codec) {
2276             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
2277                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
2278             return AVERROR(EINVAL);
2279         }
2280
2281         /* update requested sample format for the decoder based on the
2282            corresponding encoder sample format */
2283         for (i = 0; i < nb_output_streams; i++) {
2284             OutputStream *ost = output_streams[i];
2285             if (ost->source_index == ist_index) {
2286                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
2287                 break;
2288             }
2289         }
2290
2291         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
2292             ist->st->codec->get_buffer     = codec_get_buffer;
2293             ist->st->codec->release_buffer = codec_release_buffer;
2294             ist->st->codec->opaque         = &ist->buffer_pool;
2295         }
2296
2297         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2298             av_dict_set(&ist->opts, "threads", "auto", 0);
2299         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2300             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2301                     ist->file_index, ist->st->index);
2302             return AVERROR(EINVAL);
2303         }
2304         assert_codec_experimental(ist->st->codec, 0);
2305         assert_avoptions(ist->opts);
2306     }
2307
2308     ist->last_dts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
2309     ist->next_dts = AV_NOPTS_VALUE;
2310     init_pts_correction(&ist->pts_ctx);
2311     ist->is_start = 1;
2312
2313     return 0;
2314 }
2315
2316 static InputStream *get_input_stream(OutputStream *ost)
2317 {
2318     if (ost->source_index >= 0)
2319         return input_streams[ost->source_index];
2320
2321     if (ost->filter) {
2322         FilterGraph *fg = ost->filter->graph;
2323         int i;
2324
2325         for (i = 0; i < fg->nb_inputs; i++)
2326             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
2327                 return fg->inputs[i]->ist;
2328     }
2329
2330     return NULL;
2331 }
2332
2333 static void parse_forced_key_frames(char *kf, OutputStream *ost,
2334                                     AVCodecContext *avctx)
2335 {
2336     char *p;
2337     int n = 1, i;
2338     int64_t t;
2339
2340     for (p = kf; *p; p++)
2341         if (*p == ',')
2342             n++;
2343     ost->forced_kf_count = n;
2344     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
2345     if (!ost->forced_kf_pts) {
2346         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
2347         exit_program(1);
2348     }
2349     for (i = 0; i < n; i++) {
2350         p = i ? strchr(p, ',') + 1 : kf;
2351         t = parse_time_or_die("force_key_frames", p, 1);
2352         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2353     }
2354 }
2355
2356 static int transcode_init(void)
2357 {
2358     int ret = 0, i, j, k;
2359     AVFormatContext *oc;
2360     AVCodecContext *codec, *icodec;
2361     OutputStream *ost;
2362     InputStream *ist;
2363     char error[1024];
2364     int want_sdp = 1;
2365
2366     /* init framerate emulation */
2367     for (i = 0; i < nb_input_files; i++) {
2368         InputFile *ifile = input_files[i];
2369         if (ifile->rate_emu)
2370             for (j = 0; j < ifile->nb_streams; j++)
2371                 input_streams[j + ifile->ist_index]->start = av_gettime();
2372     }
2373
2374     /* output stream init */
2375     for (i = 0; i < nb_output_files; i++) {
2376         oc = output_files[i]->ctx;
2377         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2378             av_dump_format(oc, i, oc->filename, 1);
2379             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2380             return AVERROR(EINVAL);
2381         }
2382     }
2383
2384     /* init complex filtergraphs */
2385     for (i = 0; i < nb_filtergraphs; i++)
2386         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2387             return ret;
2388
2389     /* for each output stream, we compute the right encoding parameters */
2390     for (i = 0; i < nb_output_streams; i++) {
2391         ost = output_streams[i];
2392         oc  = output_files[ost->file_index]->ctx;
2393         ist = get_input_stream(ost);
2394
2395         if (ost->attachment_filename)
2396             continue;
2397
2398         codec  = ost->st->codec;
2399
2400         if (ist) {
2401             icodec = ist->st->codec;
2402
2403             ost->st->disposition          = ist->st->disposition;
2404             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2405             codec->chroma_sample_location = icodec->chroma_sample_location;
2406         }
2407
2408         if (ost->stream_copy) {
2409             uint64_t extra_size;
2410
2411             av_assert0(ist && !ost->filter);
2412
2413             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2414
2415             if (extra_size > INT_MAX) {
2416                 return AVERROR(EINVAL);
2417             }
2418
2419             /* if stream_copy is selected, no need to decode or encode */
2420             codec->codec_id   = icodec->codec_id;
2421             codec->codec_type = icodec->codec_type;
2422
2423             if (!codec->codec_tag) {
2424                 if (!oc->oformat->codec_tag ||
2425                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2426                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2427                     codec->codec_tag = icodec->codec_tag;
2428             }
2429
2430             codec->bit_rate       = icodec->bit_rate;
2431             codec->rc_max_rate    = icodec->rc_max_rate;
2432             codec->rc_buffer_size = icodec->rc_buffer_size;
2433             codec->field_order    = icodec->field_order;
2434             codec->extradata      = av_mallocz(extra_size);
2435             if (!codec->extradata) {
2436                 return AVERROR(ENOMEM);
2437             }
2438             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2439             codec->extradata_size = icodec->extradata_size;
2440             if (!copy_tb) {
2441                 codec->time_base      = icodec->time_base;
2442                 codec->time_base.num *= icodec->ticks_per_frame;
2443                 av_reduce(&codec->time_base.num, &codec->time_base.den,
2444                           codec->time_base.num, codec->time_base.den, INT_MAX);
2445             } else
2446                 codec->time_base = ist->st->time_base;
2447
2448             switch (codec->codec_type) {
2449             case AVMEDIA_TYPE_AUDIO:
2450                 if (audio_volume != 256) {
2451                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2452                     exit_program(1);
2453                 }
2454                 codec->channel_layout     = icodec->channel_layout;
2455                 codec->sample_rate        = icodec->sample_rate;
2456                 codec->channels           = icodec->channels;
2457                 codec->frame_size         = icodec->frame_size;
2458                 codec->audio_service_type = icodec->audio_service_type;
2459                 codec->block_align        = icodec->block_align;
2460                 break;
2461             case AVMEDIA_TYPE_VIDEO:
2462                 codec->pix_fmt            = icodec->pix_fmt;
2463                 codec->width              = icodec->width;
2464                 codec->height             = icodec->height;
2465                 codec->has_b_frames       = icodec->has_b_frames;
2466                 if (!codec->sample_aspect_ratio.num) {
2467                     codec->sample_aspect_ratio   =
2468                     ost->st->sample_aspect_ratio =
2469                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2470                         ist->st->codec->sample_aspect_ratio.num ?
2471                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2472                 }
2473                 break;
2474             case AVMEDIA_TYPE_SUBTITLE:
2475                 codec->width  = icodec->width;
2476                 codec->height = icodec->height;
2477                 break;
2478             case AVMEDIA_TYPE_DATA:
2479             case AVMEDIA_TYPE_ATTACHMENT:
2480                 break;
2481             default:
2482                 abort();
2483             }
2484         } else {
2485             if (!ost->enc) {
2486                 /* should only happen when a default codec is not present. */
2487                 snprintf(error, sizeof(error), "Automatic encoder selection "
2488                          "failed for output stream #%d:%d. Default encoder for "
2489                          "format %s is probably disabled. Please choose an "
2490                          "encoder manually.\n", ost->file_index, ost->index,
2491                          oc->oformat->name);
2492                 ret = AVERROR(EINVAL);
2493                 goto dump_format;
2494             }
2495
2496             if (ist)
2497                 ist->decoding_needed = 1;
2498             ost->encoding_needed = 1;
2499
2500             /*
2501              * We want CFR output if and only if one of those is true:
2502              * 1) user specified output framerate with -r
2503              * 2) user specified -vsync cfr
2504              * 3) output format is CFR and the user didn't force vsync to
2505              *    something else than CFR
2506              *
2507              * in such a case, set ost->frame_rate
2508              */
2509             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
2510                 !ost->frame_rate.num && ist &&
2511                 (video_sync_method ==  VSYNC_CFR ||
2512                  (video_sync_method ==  VSYNC_AUTO &&
2513                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
2514                 ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
2515                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2516                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2517                     ost->frame_rate = ost->enc->supported_framerates[idx];
2518                 }
2519             }
2520
2521             if (!ost->filter &&
2522                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2523                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2524                     FilterGraph *fg;
2525                     fg = init_simple_filtergraph(ist, ost);
2526                     if (configure_filtergraph(fg)) {
2527                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2528                         exit(1);
2529                     }
2530             }
2531
2532             switch (codec->codec_type) {
2533             case AVMEDIA_TYPE_AUDIO:
2534                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2535                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2536                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2537                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
2538                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2539                 break;
2540             case AVMEDIA_TYPE_VIDEO:
2541                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
2542
2543                 codec->width  = ost->filter->filter->inputs[0]->w;
2544                 codec->height = ost->filter->filter->inputs[0]->h;
2545                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2546                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
2547                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
2548                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2549                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2550
2551                 if (codec->width   != icodec->width  ||
2552                     codec->height  != icodec->height ||
2553                     codec->pix_fmt != icodec->pix_fmt) {
2554                     codec->bits_per_raw_sample = 0;
2555                 }
2556
2557                 if (ost->forced_keyframes)
2558                     parse_forced_key_frames(ost->forced_keyframes, ost,
2559                                             ost->st->codec);
2560                 break;
2561             case AVMEDIA_TYPE_SUBTITLE:
2562                 codec->time_base = (AVRational){1, 1000};
2563                 break;
2564             default:
2565                 abort();
2566                 break;
2567             }
2568             /* two pass mode */
2569             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
2570                 char logfilename[1024];
2571                 FILE *f;
2572
2573                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2574                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
2575                          i);
2576                 if (!strcmp(ost->enc->name, "libx264")) {
2577                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2578                 } else {
2579                     if (codec->flags & CODEC_FLAG_PASS1) {
2580                         f = fopen(logfilename, "wb");
2581                         if (!f) {
2582                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2583                                    logfilename, strerror(errno));
2584                             exit_program(1);
2585                         }
2586                         ost->logfile = f;
2587                     } else {
2588                         char  *logbuffer;
2589                         size_t logbuffer_size;
2590                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2591                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2592                                    logfilename);
2593                             exit_program(1);
2594                         }
2595                         codec->stats_in = logbuffer;
2596                     }
2597                 }
2598             }
2599         }
2600     }
2601
2602     /* open each encoder */
2603     for (i = 0; i < nb_output_streams; i++) {
2604         ost = output_streams[i];
2605         if (ost->encoding_needed) {
2606             AVCodec      *codec = ost->enc;
2607             AVCodecContext *dec = NULL;
2608
2609             if ((ist = get_input_stream(ost)))
2610                 dec = ist->st->codec;
2611             if (dec && dec->subtitle_header) {
2612                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
2613                 if (!ost->st->codec->subtitle_header) {
2614                     ret = AVERROR(ENOMEM);
2615                     goto dump_format;
2616                 }
2617                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2618                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2619             }
2620             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2621                 av_dict_set(&ost->opts, "threads", "auto", 0);
2622             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
2623                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2624                         ost->file_index, ost->index);
2625                 ret = AVERROR(EINVAL);
2626                 goto dump_format;
2627             }
2628             assert_codec_experimental(ost->st->codec, 1);
2629             assert_avoptions(ost->opts);
2630             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2631                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2632                                              "It takes bits/s as argument, not kbits/s\n");
2633             extra_size += ost->st->codec->extradata_size;
2634
2635             if (ost->st->codec->me_threshold)
2636                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
2637         }
2638     }
2639
2640     /* init input streams */
2641     for (i = 0; i < nb_input_streams; i++)
2642         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
2643             goto dump_format;
2644
2645     /* discard unused programs */
2646     for (i = 0; i < nb_input_files; i++) {
2647         InputFile *ifile = input_files[i];
2648         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2649             AVProgram *p = ifile->ctx->programs[j];
2650             int discard  = AVDISCARD_ALL;
2651
2652             for (k = 0; k < p->nb_stream_indexes; k++)
2653                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
2654                     discard = AVDISCARD_DEFAULT;
2655                     break;
2656                 }
2657             p->discard = discard;
2658         }
2659     }
2660
2661     /* open files and write file headers */
2662     for (i = 0; i < nb_output_files; i++) {
2663         oc = output_files[i]->ctx;
2664         oc->interrupt_callback = int_cb;
2665         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
2666             char errbuf[128];
2667             const char *errbuf_ptr = errbuf;
2668             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
2669                 errbuf_ptr = strerror(AVUNERROR(ret));
2670             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
2671             ret = AVERROR(EINVAL);
2672             goto dump_format;
2673         }
2674         assert_avoptions(output_files[i]->opts);
2675         if (strcmp(oc->oformat->name, "rtp")) {
2676             want_sdp = 0;
2677         }
2678     }
2679
2680  dump_format:
2681     /* dump the file output parameters - cannot be done before in case
2682        of stream copy */
2683     for (i = 0; i < nb_output_files; i++) {
2684         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
2685     }
2686
2687     /* dump the stream mapping */
2688     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2689     for (i = 0; i < nb_input_streams; i++) {
2690         ist = input_streams[i];
2691
2692         for (j = 0; j < ist->nb_filters; j++) {
2693             if (ist->filters[j]->graph->graph_desc) {
2694                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
2695                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
2696                        ist->filters[j]->name);
2697                 if (nb_filtergraphs > 1)
2698                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
2699                 av_log(NULL, AV_LOG_INFO, "\n");
2700             }
2701         }
2702     }
2703
2704     for (i = 0; i < nb_output_streams; i++) {
2705         ost = output_streams[i];
2706
2707         if (ost->attachment_filename) {
2708             /* an attached file */
2709             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2710                    ost->attachment_filename, ost->file_index, ost->index);
2711             continue;
2712         }
2713
2714         if (ost->filter && ost->filter->graph->graph_desc) {
2715             /* output from a complex graph */
2716             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
2717             if (nb_filtergraphs > 1)
2718                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
2719
2720             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
2721                    ost->index, ost->enc ? ost->enc->name : "?");
2722             continue;
2723         }
2724
2725         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2726                input_streams[ost->source_index]->file_index,
2727                input_streams[ost->source_index]->st->index,
2728                ost->file_index,
2729                ost->index);
2730         if (ost->sync_ist != input_streams[ost->source_index])
2731             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2732                    ost->sync_ist->file_index,
2733                    ost->sync_ist->st->index);
2734         if (ost->stream_copy)
2735             av_log(NULL, AV_LOG_INFO, " (copy)");
2736         else
2737             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
2738                    input_streams[ost->source_index]->dec->name : "?",
2739                    ost->enc ? ost->enc->name : "?");
2740         av_log(NULL, AV_LOG_INFO, "\n");
2741     }
2742
2743     if (ret) {
2744         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2745         return ret;
2746     }
2747
2748     if (want_sdp) {
2749         print_sdp();
2750     }
2751
2752     return 0;
2753 }
2754
2755 /**
2756  * @return 1 if there are still streams where more output is wanted,
2757  *         0 otherwise
2758  */
2759 static int need_output(void)
2760 {
2761     int i;
2762
2763     for (i = 0; i < nb_output_streams; i++) {
2764         OutputStream *ost    = output_streams[i];
2765         OutputFile *of       = output_files[ost->file_index];
2766         AVFormatContext *os  = output_files[ost->file_index]->ctx;
2767
2768         if (ost->is_past_recording_time ||
2769             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2770             continue;
2771         if (ost->frame_number >= ost->max_frames) {
2772             int j;
2773             for (j = 0; j < of->ctx->nb_streams; j++)
2774                 output_streams[of->ost_index + j]->is_past_recording_time = 1;
2775             continue;
2776         }
2777
2778         return 1;
2779     }
2780
2781     return 0;
2782 }
2783
2784 static int select_input_file(uint8_t *no_packet)
2785 {
2786     int64_t ipts_min = INT64_MAX;
2787     int i, file_index = -1;
2788
2789     for (i = 0; i < nb_input_streams; i++) {
2790         InputStream *ist = input_streams[i];
2791         int64_t ipts     = ist->last_dts;
2792
2793         if (ist->discard || no_packet[ist->file_index])
2794             continue;
2795         if (!input_files[ist->file_index]->eof_reached) {
2796             if (ipts < ipts_min) {
2797                 ipts_min = ipts;
2798                 file_index = ist->file_index;
2799             }
2800         }
2801     }
2802
2803     return file_index;
2804 }
2805
2806 #if HAVE_PTHREADS
2807 static void *input_thread(void *arg)
2808 {
2809     InputFile *f = arg;
2810     int ret = 0;
2811
2812     while (!transcoding_finished && ret >= 0) {
2813         AVPacket pkt;
2814         ret = av_read_frame(f->ctx, &pkt);
2815
2816         if (ret == AVERROR(EAGAIN)) {
2817             av_usleep(10000);
2818             ret = 0;
2819             continue;
2820         } else if (ret < 0)
2821             break;
2822
2823         pthread_mutex_lock(&f->fifo_lock);
2824         while (!av_fifo_space(f->fifo))
2825             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2826
2827         av_dup_packet(&pkt);
2828         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2829
2830         pthread_mutex_unlock(&f->fifo_lock);
2831     }
2832
2833     f->finished = 1;
2834     return NULL;
2835 }
2836
2837 static void free_input_threads(void)
2838 {
2839     int i;
2840
2841     if (nb_input_files == 1)
2842         return;
2843
2844     transcoding_finished = 1;
2845
2846     for (i = 0; i < nb_input_files; i++) {
2847         InputFile *f = input_files[i];
2848         AVPacket pkt;
2849
2850         if (!f->fifo || f->joined)
2851             continue;
2852
2853         pthread_mutex_lock(&f->fifo_lock);
2854         while (av_fifo_size(f->fifo)) {
2855             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2856             av_free_packet(&pkt);
2857         }
2858         pthread_cond_signal(&f->fifo_cond);
2859         pthread_mutex_unlock(&f->fifo_lock);
2860
2861         pthread_join(f->thread, NULL);
2862         f->joined = 1;
2863
2864         while (av_fifo_size(f->fifo)) {
2865             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2866             av_free_packet(&pkt);
2867         }
2868         av_fifo_free(f->fifo);
2869     }
2870 }
2871
2872 static int init_input_threads(void)
2873 {
2874     int i, ret;
2875
2876     if (nb_input_files == 1)
2877         return 0;
2878
2879     for (i = 0; i < nb_input_files; i++) {
2880         InputFile *f = input_files[i];
2881
2882         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2883             return AVERROR(ENOMEM);
2884
2885         pthread_mutex_init(&f->fifo_lock, NULL);
2886         pthread_cond_init (&f->fifo_cond, NULL);
2887
2888         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2889             return AVERROR(ret);
2890     }
2891     return 0;
2892 }
2893
2894 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2895 {
2896     int ret = 0;
2897
2898     pthread_mutex_lock(&f->fifo_lock);
2899
2900     if (av_fifo_size(f->fifo)) {
2901         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2902         pthread_cond_signal(&f->fifo_cond);
2903     } else {
2904         if (f->finished)
2905             ret = AVERROR_EOF;
2906         else
2907             ret = AVERROR(EAGAIN);
2908     }
2909
2910     pthread_mutex_unlock(&f->fifo_lock);
2911
2912     return ret;
2913 }
2914 #endif
2915
2916 static int get_input_packet(InputFile *f, AVPacket *pkt)
2917 {
2918 #if HAVE_PTHREADS
2919     if (nb_input_files > 1)
2920         return get_input_packet_mt(f, pkt);
2921 #endif
2922     return av_read_frame(f->ctx, pkt);
2923 }
2924
2925 /*
2926  * The following code is the main loop of the file converter
2927  */
2928 static int transcode(void)
2929 {
2930     int ret, i;
2931     AVFormatContext *is, *os;
2932     OutputStream *ost;
2933     InputStream *ist;
2934     uint8_t *no_packet;
2935     int no_packet_count = 0;
2936     int64_t timer_start;
2937
2938     if (!(no_packet = av_mallocz(nb_input_files)))
2939         exit_program(1);
2940
2941     ret = transcode_init();
2942     if (ret < 0)
2943         goto fail;
2944
2945     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2946     term_init();
2947
2948     timer_start = av_gettime();
2949
2950 #if HAVE_PTHREADS
2951     if ((ret = init_input_threads()) < 0)
2952         goto fail;
2953 #endif
2954
2955     for (; received_sigterm == 0;) {
2956         int file_index, ist_index;
2957         AVPacket pkt;
2958
2959         /* check if there's any stream where output is still needed */
2960         if (!need_output()) {
2961             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2962             break;
2963         }
2964
2965         /* select the stream that we must read now */
2966         file_index = select_input_file(no_packet);
2967         /* if none, if is finished */
2968         if (file_index < 0) {
2969             if (no_packet_count) {
2970                 no_packet_count = 0;
2971                 memset(no_packet, 0, nb_input_files);
2972                 av_usleep(10000);
2973                 continue;
2974             }
2975             av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
2976             break;
2977         }
2978
2979         is  = input_files[file_index]->ctx;
2980         ret = get_input_packet(input_files[file_index], &pkt);
2981
2982         if (ret == AVERROR(EAGAIN)) {
2983             no_packet[file_index] = 1;
2984             no_packet_count++;
2985             continue;
2986         }
2987         if (ret < 0) {
2988             input_files[file_index]->eof_reached = 1;
2989
2990             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
2991                 ist = input_streams[input_files[file_index]->ist_index + i];
2992                 if (ist->decoding_needed)
2993                     output_packet(ist, NULL);
2994             }
2995
2996             if (opt_shortest)
2997                 break;
2998             else
2999                 continue;
3000         }
3001
3002         no_packet_count = 0;
3003         memset(no_packet, 0, nb_input_files);
3004
3005         if (do_pkt_dump) {
3006             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3007                              is->streams[pkt.stream_index]);
3008         }
3009         /* the following test is needed in case new streams appear
3010            dynamically in stream : we ignore them */
3011         if (pkt.stream_index >= input_files[file_index]->nb_streams)
3012             goto discard_packet;
3013         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
3014         ist = input_streams[ist_index];
3015         if (ist->discard)
3016             goto discard_packet;
3017
3018         if (pkt.dts != AV_NOPTS_VALUE)
3019             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3020         if (pkt.pts != AV_NOPTS_VALUE)
3021             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3022
3023         if (pkt.pts != AV_NOPTS_VALUE)
3024             pkt.pts *= ist->ts_scale;
3025         if (pkt.dts != AV_NOPTS_VALUE)
3026             pkt.dts *= ist->ts_scale;
3027
3028         //fprintf(stderr, "next:%"PRId64" dts:%"PRId64" off:%"PRId64" %d\n",
3029         //        ist->next_dts,
3030         //        pkt.dts, input_files[ist->file_index].ts_offset,
3031         //        ist->st->codec->codec_type);
3032         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE
3033             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
3034             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3035             int64_t delta   = pkt_dts - ist->next_dts;
3036             if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
3037                 input_files[ist->file_index]->ts_offset -= delta;
3038                 av_log(NULL, AV_LOG_DEBUG,
3039                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3040                        delta, input_files[ist->file_index]->ts_offset);
3041                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3042                 if (pkt.pts != AV_NOPTS_VALUE)
3043                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3044             }
3045         }
3046
3047         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
3048         if (output_packet(ist, &pkt) < 0 || poll_filters() < 0) {
3049             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
3050                    ist->file_index, ist->st->index);
3051             if (exit_on_error)
3052                 exit_program(1);
3053             av_free_packet(&pkt);
3054             continue;
3055         }
3056
3057     discard_packet:
3058         av_free_packet(&pkt);
3059
3060         /* dump report by using the output first video and audio streams */
3061         print_report(0, timer_start);
3062     }
3063 #if HAVE_PTHREADS
3064     free_input_threads();
3065 #endif
3066
3067     /* at the end of stream, we must flush the decoder buffers */
3068     for (i = 0; i < nb_input_streams; i++) {
3069         ist = input_streams[i];
3070         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3071             output_packet(ist, NULL);
3072         }
3073     }
3074     poll_filters();
3075     flush_encoders();
3076
3077     term_exit();
3078
3079     /* write the trailer if needed and close file */
3080     for (i = 0; i < nb_output_files; i++) {
3081         os = output_files[i]->ctx;
3082         av_write_trailer(os);
3083     }
3084
3085     /* dump report by using the first video and audio streams */
3086     print_report(1, timer_start);
3087
3088     /* close each encoder */
3089     for (i = 0; i < nb_output_streams; i++) {
3090         ost = output_streams[i];
3091         if (ost->encoding_needed) {
3092             av_freep(&ost->st->codec->stats_in);
3093             avcodec_close(ost->st->codec);
3094         }
3095     }
3096
3097     /* close each decoder */
3098     for (i = 0; i < nb_input_streams; i++) {
3099         ist = input_streams[i];
3100         if (ist->decoding_needed) {
3101             avcodec_close(ist->st->codec);
3102         }
3103     }
3104
3105     /* finished ! */
3106     ret = 0;
3107
3108  fail:
3109     av_freep(&no_packet);
3110 #if HAVE_PTHREADS
3111     free_input_threads();
3112 #endif
3113
3114     if (output_streams) {
3115         for (i = 0; i < nb_output_streams; i++) {
3116             ost = output_streams[i];
3117             if (ost) {
3118                 if (ost->stream_copy)
3119                     av_freep(&ost->st->codec->extradata);
3120                 if (ost->logfile) {
3121                     fclose(ost->logfile);
3122                     ost->logfile = NULL;
3123                 }
3124                 av_freep(&ost->st->codec->subtitle_header);
3125                 av_free(ost->forced_kf_pts);
3126                 av_dict_free(&ost->opts);
3127             }
3128         }
3129     }
3130     return ret;
3131 }
3132
3133 static double parse_frame_aspect_ratio(const char *arg)
3134 {
3135     int x = 0, y = 0;
3136     double ar = 0;
3137     const char *p;
3138     char *end;
3139
3140     p = strchr(arg, ':');
3141     if (p) {
3142         x = strtol(arg, &end, 10);
3143         if (end == p)
3144             y = strtol(end + 1, &end, 10);
3145         if (x > 0 && y > 0)
3146             ar = (double)x / (double)y;
3147     } else
3148         ar = strtod(arg, NULL);
3149
3150     if (!ar) {
3151         av_log(NULL, AV_LOG_FATAL, "Incorrect aspect ratio specification.\n");
3152         exit_program(1);
3153     }
3154     return ar;
3155 }
3156
3157 static int opt_audio_codec(OptionsContext *o, const char *opt, const char *arg)
3158 {
3159     return parse_option(o, "codec:a", arg, options);
3160 }
3161
3162 static int opt_video_codec(OptionsContext *o, const char *opt, const char *arg)
3163 {
3164     return parse_option(o, "codec:v", arg, options);
3165 }
3166
3167 static int opt_subtitle_codec(OptionsContext *o, const char *opt, const char *arg)
3168 {
3169     return parse_option(o, "codec:s", arg, options);
3170 }
3171
3172 static int opt_data_codec(OptionsContext *o, const char *opt, const char *arg)
3173 {
3174     return parse_option(o, "codec:d", arg, options);
3175 }
3176
3177 static int opt_map(OptionsContext *o, const char *opt, const char *arg)
3178 {
3179     StreamMap *m = NULL;
3180     int i, negative = 0, file_idx;
3181     int sync_file_idx = -1, sync_stream_idx;
3182     char *p, *sync;
3183     char *map;
3184
3185     if (*arg == '-') {
3186         negative = 1;
3187         arg++;
3188     }
3189     map = av_strdup(arg);
3190
3191     /* parse sync stream first, just pick first matching stream */
3192     if (sync = strchr(map, ',')) {
3193         *sync = 0;
3194         sync_file_idx = strtol(sync + 1, &sync, 0);
3195         if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
3196             av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
3197             exit_program(1);
3198         }
3199         if (*sync)
3200             sync++;
3201         for (i = 0; i < input_files[sync_file_idx]->nb_streams; i++)
3202             if (check_stream_specifier(input_files[sync_file_idx]->ctx,
3203                                        input_files[sync_file_idx]->ctx->streams[i], sync) == 1) {
3204                 sync_stream_idx = i;
3205                 break;
3206             }
3207         if (i == input_files[sync_file_idx]->nb_streams) {
3208             av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
3209                                        "match any streams.\n", arg);
3210             exit_program(1);
3211         }
3212     }
3213
3214
3215     if (map[0] == '[') {
3216         /* this mapping refers to lavfi output */
3217         const char *c = map + 1;
3218         o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3219                                     &o->nb_stream_maps, o->nb_stream_maps + 1);
3220         m = &o->stream_maps[o->nb_stream_maps - 1];
3221         m->linklabel = av_get_token(&c, "]");
3222         if (!m->linklabel) {
3223             av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
3224             exit_program(1);
3225         }
3226     } else {
3227         file_idx = strtol(map, &p, 0);
3228         if (file_idx >= nb_input_files || file_idx < 0) {
3229             av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
3230             exit_program(1);
3231         }
3232         if (negative)
3233             /* disable some already defined maps */
3234             for (i = 0; i < o->nb_stream_maps; i++) {
3235                 m = &o->stream_maps[i];
3236                 if (file_idx == m->file_index &&
3237                     check_stream_specifier(input_files[m->file_index]->ctx,
3238                                            input_files[m->file_index]->ctx->streams[m->stream_index],
3239                                            *p == ':' ? p + 1 : p) > 0)
3240                     m->disabled = 1;
3241             }
3242         else
3243             for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
3244                 if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
3245                             *p == ':' ? p + 1 : p) <= 0)
3246                     continue;
3247                 o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3248                                             &o->nb_stream_maps, o->nb_stream_maps + 1);
3249                 m = &o->stream_maps[o->nb_stream_maps - 1];
3250
3251                 m->file_index   = file_idx;
3252                 m->stream_index = i;
3253
3254                 if (sync_file_idx >= 0) {
3255                     m->sync_file_index   = sync_file_idx;
3256                     m->sync_stream_index = sync_stream_idx;
3257                 } else {
3258                     m->sync_file_index   = file_idx;
3259                     m->sync_stream_index = i;
3260                 }
3261             }
3262     }
3263
3264     if (!m) {
3265         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
3266         exit_program(1);
3267     }
3268
3269     av_freep(&map);
3270     return 0;
3271 }
3272
3273 static int opt_attach(OptionsContext *o, const char *opt, const char *arg)
3274 {
3275     o->attachments = grow_array(o->attachments, sizeof(*o->attachments),
3276                                 &o->nb_attachments, o->nb_attachments + 1);
3277     o->attachments[o->nb_attachments - 1] = arg;
3278     return 0;
3279 }
3280
3281 /**
3282  * Parse a metadata specifier in arg.
3283  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
3284  * @param index for type c/p, chapter/program index is written here
3285  * @param stream_spec for type s, the stream specifier is written here
3286  */
3287 static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
3288 {
3289     if (*arg) {
3290         *type = *arg;
3291         switch (*arg) {
3292         case 'g':
3293             break;
3294         case 's':
3295             if (*(++arg) && *arg != ':') {
3296                 av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
3297                 exit_program(1);
3298             }
3299             *stream_spec = *arg == ':' ? arg + 1 : "";
3300             break;
3301         case 'c':
3302         case 'p':
3303             if (*(++arg) == ':')
3304                 *index = strtol(++arg, NULL, 0);
3305             break;
3306         default:
3307             av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
3308             exit_program(1);
3309         }
3310     } else
3311         *type = 'g';
3312 }
3313
3314 static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
3315 {
3316     AVDictionary **meta_in = NULL;
3317     AVDictionary **meta_out;
3318     int i, ret = 0;
3319     char type_in, type_out;
3320     const char *istream_spec = NULL, *ostream_spec = NULL;
3321     int idx_in = 0, idx_out = 0;
3322
3323     parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
3324     parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
3325
3326     if (type_in == 'g' || type_out == 'g')
3327         o->metadata_global_manual = 1;
3328     if (type_in == 's' || type_out == 's')
3329         o->metadata_streams_manual = 1;
3330     if (type_in == 'c' || type_out == 'c')
3331         o->metadata_chapters_manual = 1;
3332
3333 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
3334     if ((index) < 0 || (index) >= (nb_elems)) {\
3335         av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
3336                 (desc), (index));\
3337         exit_program(1);\
3338     }
3339
3340 #define SET_DICT(type, meta, context, index)\
3341         switch (type) {\
3342         case 'g':\
3343             meta = &context->metadata;\
3344             break;\
3345         case 'c':\
3346             METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
3347             meta = &context->chapters[index]->metadata;\
3348             break;\
3349         case 'p':\
3350             METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
3351             meta = &context->programs[index]->metadata;\
3352             break;\
3353         default: av_assert0(0);\
3354         }\
3355
3356     SET_DICT(type_in, meta_in, ic, idx_in);
3357     SET_DICT(type_out, meta_out, oc, idx_out);
3358
3359     /* for input streams choose first matching stream */
3360     if (type_in == 's') {
3361         for (i = 0; i < ic->nb_streams; i++) {
3362             if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
3363                 meta_in = &ic->streams[i]->metadata;
3364                 break;
3365             } else if (ret < 0)
3366                 exit_program(1);
3367         }
3368         if (!meta_in) {
3369             av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
3370             exit_program(1);
3371         }
3372     }
3373
3374     if (type_out == 's') {
3375         for (i = 0; i < oc->nb_streams; i++) {
3376             if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
3377                 meta_out = &oc->streams[i]->metadata;
3378                 av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3379             } else if (ret < 0)
3380                 exit_program(1);
3381         }
3382     } else
3383         av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3384
3385     return 0;
3386 }
3387
3388 static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
3389 {
3390     const char *codec_string = encoder ? "encoder" : "decoder";
3391     AVCodec *codec;
3392
3393     codec = encoder ?
3394         avcodec_find_encoder_by_name(name) :
3395         avcodec_find_decoder_by_name(name);
3396     if (!codec) {
3397         av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
3398         exit_program(1);
3399     }
3400     if (codec->type != type) {
3401         av_log(NULL, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
3402         exit_program(1);
3403     }
3404     return codec;
3405 }
3406
3407 static AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVStream *st)
3408 {
3409     char *codec_name = NULL;
3410
3411     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
3412     if (codec_name) {
3413         AVCodec *codec = find_codec_or_die(codec_name, st->codec->codec_type, 0);
3414         st->codec->codec_id = codec->id;
3415         return codec;
3416     } else
3417         return avcodec_find_decoder(st->codec->codec_id);
3418 }
3419
3420 /**
3421  * Add all the streams from the given input file to the global
3422  * list of input streams.
3423  */
3424 static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
3425 {
3426     int i;
3427
3428     for (i = 0; i < ic->nb_streams; i++) {
3429         AVStream *st = ic->streams[i];
3430         AVCodecContext *dec = st->codec;
3431         InputStream *ist = av_mallocz(sizeof(*ist));
3432         char *framerate = NULL;
3433
3434         if (!ist)
3435             exit_program(1);
3436
3437         input_streams = grow_array(input_streams, sizeof(*input_streams), &nb_input_streams, nb_input_streams + 1);
3438         input_streams[nb_input_streams - 1] = ist;
3439
3440         ist->st = st;
3441         ist->file_index = nb_input_files;
3442         ist->discard = 1;
3443         st->discard  = AVDISCARD_ALL;
3444         ist->opts = filter_codec_opts(codec_opts, ist->st->codec->codec_id, ic, st, NULL);
3445
3446         ist->ts_scale = 1.0;
3447         MATCH_PER_STREAM_OPT(ts_scale, dbl, ist->ts_scale, ic, st);
3448
3449         ist->dec = choose_decoder(o, ic, st);
3450
3451         switch (dec->codec_type) {
3452         case AVMEDIA_TYPE_VIDEO:
3453             ist->resample_height  = dec->height;
3454             ist->resample_width   = dec->width;
3455             ist->resample_pix_fmt = dec->pix_fmt;
3456
3457             MATCH_PER_STREAM_OPT(frame_rates, str, framerate, ic, st);
3458             if (framerate && av_parse_video_rate(&ist->framerate,
3459                                                  framerate) < 0) {
3460                 av_log(NULL, AV_LOG_ERROR, "Error parsing framerate %s.\n",
3461                        framerate);
3462                 exit_program(1);
3463             }
3464
3465             break;
3466         case AVMEDIA_TYPE_AUDIO:
3467             guess_input_channel_layout(ist);
3468
3469             ist->resample_sample_fmt     = dec->sample_fmt;
3470             ist->resample_sample_rate    = dec->sample_rate;
3471             ist->resample_channels       = dec->channels;
3472             ist->resample_channel_layout = dec->channel_layout;
3473
3474             break;
3475         case AVMEDIA_TYPE_DATA:
3476         case AVMEDIA_TYPE_SUBTITLE:
3477         case AVMEDIA_TYPE_ATTACHMENT:
3478         case AVMEDIA_TYPE_UNKNOWN:
3479             break;
3480         default:
3481             abort();
3482         }
3483     }
3484 }
3485
3486 static void assert_file_overwrite(const char *filename)
3487 {
3488     if (!file_overwrite &&
3489         (strchr(filename, ':') == NULL || filename[1] == ':' ||
3490          av_strstart(filename, "file:", NULL))) {
3491         if (avio_check(filename, 0) == 0) {
3492             if (!using_stdin) {
3493                 fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
3494                 fflush(stderr);
3495                 if (!read_yesno()) {
3496                     fprintf(stderr, "Not overwriting - exiting\n");
3497                     exit_program(1);
3498                 }
3499             }
3500             else {
3501                 fprintf(stderr,"File '%s' already exists. Exiting.\n", filename);
3502                 exit_program(1);
3503             }
3504         }
3505     }
3506 }
3507
3508 static void dump_attachment(AVStream *st, const char *filename)
3509 {
3510     int ret;
3511     AVIOContext *out = NULL;
3512     AVDictionaryEntry *e;
3513
3514     if (!st->codec->extradata_size) {
3515         av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
3516                nb_input_files - 1, st->index);
3517         return;
3518     }
3519     if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
3520         filename = e->value;
3521     if (!*filename) {
3522         av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
3523                "in stream #%d:%d.\n", nb_input_files - 1, st->index);
3524         exit_program(1);
3525     }
3526
3527     assert_file_overwrite(filename);
3528
3529     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
3530         av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
3531                filename);
3532         exit_program(1);
3533     }
3534
3535     avio_write(out, st->codec->extradata, st->codec->extradata_size);
3536     avio_flush(out);
3537     avio_close(out);
3538 }
3539
3540 static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
3541 {
3542     AVFormatContext *ic;
3543     AVInputFormat *file_iformat = NULL;
3544     int err, i, ret;
3545     int64_t timestamp;
3546     uint8_t buf[128];
3547     AVDictionary **opts;
3548     int orig_nb_streams;                     // number of streams before avformat_find_stream_info
3549
3550     if (o->format) {
3551         if (!(file_iformat = av_find_input_format(o->format))) {
3552             av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
3553             exit_program(1);
3554         }
3555     }
3556
3557     if (!strcmp(filename, "-"))
3558         filename = "pipe:";
3559
3560     using_stdin |= !strncmp(filename, "pipe:", 5) ||
3561                     !strcmp(filename, "/dev/stdin");
3562
3563     /* get default parameters from command line */
3564     ic = avformat_alloc_context();
3565     if (!ic) {
3566         print_error(filename, AVERROR(ENOMEM));
3567         exit_program(1);
3568     }
3569     if (o->nb_audio_sample_rate) {
3570         snprintf(buf, sizeof(buf), "%d", o->audio_sample_rate[o->nb_audio_sample_rate - 1].u.i);
3571         av_dict_set(&format_opts, "sample_rate", buf, 0);
3572     }
3573     if (o->nb_audio_channels) {
3574         /* because we set audio_channels based on both the "ac" and
3575          * "channel_layout" options, we need to check that the specified
3576          * demuxer actually has the "channels" option before setting it */
3577         if (file_iformat && file_iformat->priv_class &&
3578             av_opt_find(&file_iformat->priv_class, "channels", NULL, 0,
3579                         AV_OPT_SEARCH_FAKE_OBJ)) {
3580             snprintf(buf, sizeof(buf), "%d",
3581                      o->audio_channels[o->nb_audio_channels - 1].u.i);
3582             av_dict_set(&format_opts, "channels", buf, 0);
3583         }
3584     }
3585     if (o->nb_frame_rates) {
3586         /* set the format-level framerate option;
3587          * this is important for video grabbers, e.g. x11 */
3588         if (file_iformat && file_iformat->priv_class &&
3589             av_opt_find(&file_iformat->priv_class, "framerate", NULL, 0,
3590                         AV_OPT_SEARCH_FAKE_OBJ)) {
3591             av_dict_set(&format_opts, "framerate",
3592                         o->frame_rates[o->nb_frame_rates - 1].u.str, 0);
3593         }
3594     }
3595     if (o->nb_frame_sizes) {
3596         av_dict_set(&format_opts, "video_size", o->frame_sizes[o->nb_frame_sizes - 1].u.str, 0);
3597     }
3598     if (o->nb_frame_pix_fmts)
3599         av_dict_set(&format_opts, "pixel_format", o->frame_pix_fmts[o->nb_frame_pix_fmts - 1].u.str, 0);
3600
3601     ic->flags |= AVFMT_FLAG_NONBLOCK;
3602     ic->interrupt_callback = int_cb;
3603
3604     /* open the input file with generic libav function */
3605     err = avformat_open_input(&ic, filename, file_iformat, &format_opts);
3606     if (err < 0) {
3607         print_error(filename, err);
3608         exit_program(1);
3609     }
3610     assert_avoptions(format_opts);
3611
3612     /* apply forced codec ids */
3613     for (i = 0; i < ic->nb_streams; i++)
3614         choose_decoder(o, ic, ic->streams[i]);
3615
3616     /* Set AVCodecContext options for avformat_find_stream_info */
3617     opts = setup_find_stream_info_opts(ic, codec_opts);
3618     orig_nb_streams = ic->nb_streams;
3619
3620     /* If not enough info to get the stream parameters, we decode the
3621        first frames to get it. (used in mpeg case for example) */
3622     ret = avformat_find_stream_info(ic, opts);
3623     if (ret < 0) {
3624         av_log(NULL, AV_LOG_FATAL, "%s: could not find codec parameters\n", filename);
3625         avformat_close_input(&ic);
3626         exit_program(1);
3627     }
3628
3629     timestamp = o->start_time;
3630     /* add the stream start time */
3631     if (ic->start_time != AV_NOPTS_VALUE)
3632         timestamp += ic->start_time;
3633
3634     /* if seeking requested, we execute it */
3635     if (o->start_time != 0) {
3636         ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
3637         if (ret < 0) {
3638             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
3639                    filename, (double)timestamp / AV_TIME_BASE);
3640         }
3641     }
3642
3643     /* update the current parameters so that they match the one of the input stream */
3644     add_input_streams(o, ic);
3645
3646     /* dump the file content */
3647     av_dump_format(ic, nb_input_files, filename, 0);
3648
3649     input_files = grow_array(input_files, sizeof(*input_files), &nb_input_files, nb_input_files + 1);
3650     if (!(input_files[nb_input_files - 1] = av_mallocz(sizeof(*input_files[0]))))
3651         exit_program(1);
3652
3653     input_files[nb_input_files - 1]->ctx        = ic;
3654     input_files[nb_input_files - 1]->ist_index  = nb_input_streams - ic->nb_streams;
3655     input_files[nb_input_files - 1]->ts_offset  = o->input_ts_offset - (copy_ts ? 0 : timestamp);
3656     input_files[nb_input_files - 1]->nb_streams = ic->nb_streams;
3657     input_files[nb_input_files - 1]->rate_emu   = o->rate_emu;
3658
3659     for (i = 0; i < o->nb_dump_attachment; i++) {
3660         int j;
3661
3662         for (j = 0; j < ic->nb_streams; j++) {
3663             AVStream *st = ic->streams[j];
3664
3665             if (check_stream_specifier(ic, st, o->dump_attachment[i].specifier) == 1)
3666                 dump_attachment(st, o->dump_attachment[i].u.str);
3667         }
3668     }
3669
3670     for (i = 0; i < orig_nb_streams; i++)
3671         av_dict_free(&opts[i]);
3672     av_freep(&opts);
3673
3674     reset_options(o);
3675     return 0;
3676 }
3677
3678 static uint8_t *get_line(AVIOContext *s)
3679 {
3680     AVIOContext *line;
3681     uint8_t *buf;
3682     char c;
3683
3684     if (avio_open_dyn_buf(&line) < 0) {
3685         av_log(NULL, AV_LOG_FATAL, "Could not alloc buffer for reading preset.\n");
3686         exit_program(1);
3687     }
3688
3689     while ((c = avio_r8(s)) && c != '\n')
3690         avio_w8(line, c);
3691     avio_w8(line, 0);
3692     avio_close_dyn_buf(line, &buf);
3693
3694     return buf;
3695 }
3696
3697 static int get_preset_file_2(const char *preset_name, const char *codec_name, AVIOContext **s)
3698 {
3699     int i, ret = 1;
3700     char filename[1000];
3701     const char *base[3] = { getenv("AVCONV_DATADIR"),
3702