avconv: use more descriptive names for hardcoded filters.
[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 # include "libavfilter/vsrc_buffer.h"
55
56 #if HAVE_SYS_RESOURCE_H
57 #include <sys/types.h>
58 #include <sys/resource.h>
59 #elif HAVE_GETPROCESSTIMES
60 #include <windows.h>
61 #endif
62 #if HAVE_GETPROCESSMEMORYINFO
63 #include <windows.h>
64 #include <psapi.h>
65 #endif
66
67 #if HAVE_SYS_SELECT_H
68 #include <sys/select.h>
69 #endif
70
71 #if HAVE_PTHREADS
72 #include <pthread.h>
73 #endif
74
75 #include <time.h>
76
77 #include "cmdutils.h"
78
79 #include "libavutil/avassert.h"
80
81 #define VSYNC_AUTO       -1
82 #define VSYNC_PASSTHROUGH 0
83 #define VSYNC_CFR         1
84 #define VSYNC_VFR         2
85
86 const char program_name[] = "avconv";
87 const int program_birth_year = 2000;
88
89 /* select an input stream for an output stream */
90 typedef struct StreamMap {
91     int disabled;           /** 1 is this mapping is disabled by a negative map */
92     int file_index;
93     int stream_index;
94     int sync_file_index;
95     int sync_stream_index;
96     char *linklabel;       /** name of an output link, for mapping lavfi outputs */
97 } StreamMap;
98
99 /**
100  * select an input file for an output file
101  */
102 typedef struct MetadataMap {
103     int  file;      ///< file index
104     char type;      ///< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
105     int  index;     ///< stream/chapter/program number
106 } MetadataMap;
107
108 static const OptionDef options[];
109
110 static int video_discard = 0;
111 static int same_quant = 0;
112 static int do_deinterlace = 0;
113 static int intra_dc_precision = 8;
114 static int qp_hist = 0;
115
116 static int file_overwrite = 0;
117 static int do_benchmark = 0;
118 static int do_hex_dump = 0;
119 static int do_pkt_dump = 0;
120 static int do_pass = 0;
121 static char *pass_logfilename_prefix = NULL;
122 static int video_sync_method = VSYNC_AUTO;
123 static int audio_sync_method = 0;
124 static float audio_drift_threshold = 0.1;
125 static int copy_ts = 0;
126 static int copy_tb = 1;
127 static int opt_shortest = 0;
128 static char *vstats_filename;
129 static FILE *vstats_file;
130
131 static int audio_volume = 256;
132
133 static int exit_on_error = 0;
134 static int using_stdin = 0;
135 static int64_t video_size = 0;
136 static int64_t audio_size = 0;
137 static int64_t extra_size = 0;
138 static int nb_frames_dup = 0;
139 static int nb_frames_drop = 0;
140 static int input_sync;
141
142 static float dts_delta_threshold = 10;
143
144 static int print_stats = 1;
145
146 #if HAVE_PTHREADS
147 /* signal to input threads that they should exit; set by the main thread */
148 static int transcoding_finished;
149 #endif
150
151 #define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
152
153 typedef struct InputFilter {
154     AVFilterContext    *filter;
155     struct InputStream *ist;
156     struct FilterGraph *graph;
157     uint8_t            *name;
158 } InputFilter;
159
160 typedef struct OutputFilter {
161     AVFilterContext     *filter;
162     struct OutputStream *ost;
163     struct FilterGraph  *graph;
164     uint8_t             *name;
165
166     /* temporary storage until stream maps are processed */
167     AVFilterInOut       *out_tmp;
168 } OutputFilter;
169
170 typedef struct FilterGraph {
171     int            index;
172     const char    *graph_desc;
173
174     AVFilterGraph *graph;
175
176     InputFilter   **inputs;
177     int          nb_inputs;
178     OutputFilter **outputs;
179     int         nb_outputs;
180 } FilterGraph;
181
182 typedef struct InputStream {
183     int file_index;
184     AVStream *st;
185     int discard;             /* true if stream data should be discarded */
186     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
187     AVCodec *dec;
188     AVFrame *decoded_frame;
189
190     int64_t       start;     /* time when read started */
191     /* predicted dts of the next packet read for this stream or (when there are
192      * several frames in a packet) of the next frame in current packet */
193     int64_t       next_dts;
194     /* dts of the last packet read for this stream */
195     int64_t       last_dts;
196     PtsCorrectionContext pts_ctx;
197     double ts_scale;
198     int is_start;            /* is 1 at the start and after a discontinuity */
199     int showed_multi_packet_warning;
200     AVDictionary *opts;
201     AVRational framerate;               /* framerate forced with -r */
202
203     int resample_height;
204     int resample_width;
205     int resample_pix_fmt;
206
207     int      resample_sample_fmt;
208     int      resample_sample_rate;
209     int      resample_channels;
210     uint64_t resample_channel_layout;
211
212     /* a pool of free buffers for decoded data */
213     FrameBuffer *buffer_pool;
214
215     /* decoded data from this stream goes into all those filters
216      * currently video and audio only */
217     InputFilter **filters;
218     int        nb_filters;
219 } InputStream;
220
221 typedef struct InputFile {
222     AVFormatContext *ctx;
223     int eof_reached;      /* true if eof reached */
224     int ist_index;        /* index of first stream in ist_table */
225     int buffer_size;      /* current total buffer size */
226     int64_t ts_offset;
227     int nb_streams;       /* number of stream that avconv is aware of; may be different
228                              from ctx.nb_streams if new streams appear during av_read_frame() */
229     int rate_emu;
230
231 #if HAVE_PTHREADS
232     pthread_t thread;           /* thread reading from this file */
233     int finished;               /* the thread has exited */
234     int joined;                 /* the thread has been joined */
235     pthread_mutex_t fifo_lock;  /* lock for access to fifo */
236     pthread_cond_t  fifo_cond;  /* the main thread will signal on this cond after reading from fifo */
237     AVFifoBuffer *fifo;         /* demuxed packets are stored here; freed by the main thread */
238 #endif
239 } InputFile;
240
241 typedef struct OutputStream {
242     int file_index;          /* file index */
243     int index;               /* stream index in the output file */
244     int source_index;        /* InputStream index */
245     AVStream *st;            /* stream in the output file */
246     int encoding_needed;     /* true if encoding needed for this stream */
247     int frame_number;
248     /* input pts and corresponding output pts
249        for A/V sync */
250     // double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
251     struct InputStream *sync_ist; /* input stream to sync against */
252     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
253     /* pts of the first frame encoded for this stream, used for limiting
254      * recording time */
255     int64_t first_pts;
256     AVBitStreamFilterContext *bitstream_filters;
257     AVCodec *enc;
258     int64_t max_frames;
259     AVFrame *filtered_frame;
260
261     /* video only */
262     AVRational frame_rate;
263     int force_fps;
264     int top_field_first;
265
266     float frame_aspect_ratio;
267     float last_quality;
268
269     /* forced key frames */
270     int64_t *forced_kf_pts;
271     int forced_kf_count;
272     int forced_kf_index;
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;
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     ist->discard         = 0;
602     ist->decoding_needed = 1;
603     ist->st->discard = AVDISCARD_NONE;
604
605     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
606                             &fg->nb_inputs, fg->nb_inputs + 1);
607     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
608         exit_program(1);
609     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
610     fg->inputs[fg->nb_inputs - 1]->graph = fg;
611
612     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
613                               &ist->nb_filters, ist->nb_filters + 1);
614     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
615 }
616
617 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
618 {
619     char *pix_fmts;
620     OutputStream *ost = ofilter->ost;
621     AVCodecContext *codec = ost->st->codec;
622     AVFilterContext *last_filter = out->filter_ctx;
623     int pad_idx = out->pad_idx;
624     int ret;
625     char name[255];
626
627     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
628     ret = avfilter_graph_create_filter(&ofilter->filter,
629                                        avfilter_get_by_name("buffersink"),
630                                        name, NULL, pix_fmts, fg->graph);
631     if (ret < 0)
632         return ret;
633
634     if (codec->width || codec->height) {
635         char args[255];
636         AVFilterContext *filter;
637
638         snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
639                  codec->width,
640                  codec->height,
641                  (unsigned)ost->sws_flags);
642         snprintf(name, sizeof(name), "scaler for output stream %d:%d",
643                  ost->file_index, ost->index);
644         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
645                                                 name, args, NULL, fg->graph)) < 0)
646             return ret;
647         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
648             return ret;
649
650         last_filter = filter;
651         pad_idx = 0;
652     }
653
654     if ((pix_fmts = choose_pix_fmts(ost))) {
655         AVFilterContext *filter;
656         snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
657                  ost->file_index, ost->index);
658         if ((ret = avfilter_graph_create_filter(&filter,
659                                                 avfilter_get_by_name("format"),
660                                                 "format", pix_fmts, NULL,
661                                                 fg->graph)) < 0)
662             return ret;
663         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
664             return ret;
665
666         last_filter = filter;
667         pad_idx     = 0;
668         av_freep(&pix_fmts);
669     }
670
671     if (ost->frame_rate.num) {
672         AVFilterContext *fps;
673         char args[255];
674
675         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
676                  ost->frame_rate.den);
677         snprintf(name, sizeof(name), "fps for output stream %d:%d",
678                  ost->file_index, ost->index);
679         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
680                                            name, args, NULL, fg->graph);
681         if (ret < 0)
682             return ret;
683
684         ret = avfilter_link(last_filter, pad_idx, fps, 0);
685         if (ret < 0)
686             return ret;
687         last_filter = fps;
688         pad_idx = 0;
689     }
690
691     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
692         return ret;
693
694     return 0;
695 }
696
697 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
698 {
699     OutputStream *ost = ofilter->ost;
700     AVCodecContext *codec  = ost->st->codec;
701     AVFilterContext *last_filter = out->filter_ctx;
702     int pad_idx = out->pad_idx;
703     char *sample_fmts, *sample_rates, *channel_layouts;
704     char name[255];
705     int ret;
706
707
708     snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
709     ret = avfilter_graph_create_filter(&ofilter->filter,
710                                        avfilter_get_by_name("abuffersink"),
711                                        name, NULL, NULL, fg->graph);
712     if (ret < 0)
713         return ret;
714
715     if (codec->channels && !codec->channel_layout)
716         codec->channel_layout = av_get_default_channel_layout(codec->channels);
717
718     sample_fmts     = choose_sample_fmts(ost);
719     sample_rates    = choose_sample_rates(ost);
720     channel_layouts = choose_channel_layouts(ost);
721     if (sample_fmts || sample_rates || channel_layouts) {
722         AVFilterContext *format;
723         char args[256];
724         int len = 0;
725
726         if (sample_fmts)
727             len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
728                             sample_fmts);
729         if (sample_rates)
730             len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
731                             sample_rates);
732         if (channel_layouts)
733             len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
734                             channel_layouts);
735         args[len - 1] = 0;
736
737         av_freep(&sample_fmts);
738         av_freep(&sample_rates);
739         av_freep(&channel_layouts);
740
741         snprintf(name, sizeof(name), "audio format for output stream %d:%d",
742                  ost->file_index, ost->index);
743         ret = avfilter_graph_create_filter(&format,
744                                            avfilter_get_by_name("aformat"),
745                                            name, args, NULL, fg->graph);
746         if (ret < 0)
747             return ret;
748
749         ret = avfilter_link(last_filter, pad_idx, format, 0);
750         if (ret < 0)
751             return ret;
752
753         last_filter = format;
754         pad_idx = 0;
755     }
756
757     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
758         return ret;
759
760     return 0;
761 }
762
763 #define DESCRIBE_FILTER_LINK(f, inout, in)                         \
764 {                                                                  \
765     AVFilterContext *ctx = inout->filter_ctx;                      \
766     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;  \
767     int       nb_pads = in ? ctx->input_count : ctx->output_count; \
768     AVIOContext *pb;                                               \
769                                                                    \
770     if (avio_open_dyn_buf(&pb) < 0)                                \
771         exit_program(1);                                           \
772                                                                    \
773     avio_printf(pb, "%s", ctx->filter->name);                      \
774     if (nb_pads > 1)                                               \
775         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
776     avio_w8(pb, 0);                                                \
777     avio_close_dyn_buf(pb, &f->name);                              \
778 }
779
780 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
781 {
782     av_freep(&ofilter->name);
783     DESCRIBE_FILTER_LINK(ofilter, out, 0);
784
785     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
786     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
787     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
788     default: av_assert0(0);
789     }
790 }
791
792 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
793                                         AVFilterInOut *in)
794 {
795     AVFilterContext *first_filter = in->filter_ctx;
796     AVFilter *filter = avfilter_get_by_name("buffer");
797     InputStream *ist = ifilter->ist;
798     AVRational tb = ist->framerate.num ? (AVRational){ist->framerate.den,
799                                                       ist->framerate.num} :
800                                          ist->st->time_base;
801     AVRational sar;
802     char args[255], name[255];
803     int pad_idx = in->pad_idx;
804     int ret;
805
806     sar = ist->st->sample_aspect_ratio.num ?
807           ist->st->sample_aspect_ratio :
808           ist->st->codec->sample_aspect_ratio;
809     snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
810              ist->st->codec->height, ist->st->codec->pix_fmt,
811              tb.num, tb.den, sar.num, sar.den);
812     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
813              ist->file_index, ist->st->index);
814
815     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, name,
816                                             args, NULL, fg->graph)) < 0)
817         return ret;
818
819     if (ist->framerate.num) {
820         AVFilterContext *setpts;
821
822         snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
823                  ist->file_index, ist->st->index);
824         if ((ret = avfilter_graph_create_filter(&setpts,
825                                                 avfilter_get_by_name("setpts"),
826                                                 name, "N", NULL,
827                                                 fg->graph)) < 0)
828             return ret;
829
830         if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0)
831             return ret;
832
833         first_filter = setpts;
834         pad_idx = 0;
835     }
836
837     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
838         return ret;
839     return 0;
840 }
841
842 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
843                                         AVFilterInOut *in)
844 {
845     AVFilterContext *first_filter = in->filter_ctx;
846     AVFilter *filter = avfilter_get_by_name("abuffer");
847     InputStream *ist = ifilter->ist;
848     int pad_idx = in->pad_idx;
849     char args[255], name[255];
850     int ret;
851
852     snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s"
853              ":channel_layout=0x%"PRIx64,
854              ist->st->time_base.num, ist->st->time_base.den,
855              ist->st->codec->sample_rate,
856              av_get_sample_fmt_name(ist->st->codec->sample_fmt),
857              ist->st->codec->channel_layout);
858     snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
859              ist->file_index, ist->st->index);
860
861     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter,
862                                             name, args, NULL,
863                                             fg->graph)) < 0)
864         return ret;
865
866     if (audio_sync_method > 0) {
867         AVFilterContext *async;
868         char args[256];
869         int  len = 0;
870
871         av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
872                "asyncts audio filter instead.\n");
873
874         if (audio_sync_method > 1)
875             len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
876                             "max_comp=%d:", audio_sync_method);
877         snprintf(args + len, sizeof(args) - len, "min_delta=%f",
878                  audio_drift_threshold);
879
880         snprintf(name, sizeof(name), "graph %d audio sync for input stream %d:%d",
881                  fg->index, ist->file_index, ist->st->index);
882         ret = avfilter_graph_create_filter(&async,
883                                            avfilter_get_by_name("asyncts"),
884                                            name, args, NULL, fg->graph);
885         if (ret < 0)
886             return ret;
887
888         ret = avfilter_link(async, 0, first_filter, pad_idx);
889         if (ret < 0)
890             return ret;
891
892         first_filter = async;
893         pad_idx = 0;
894     }
895     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
896         return ret;
897
898     return 0;
899 }
900
901 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
902                                   AVFilterInOut *in)
903 {
904     av_freep(&ifilter->name);
905     DESCRIBE_FILTER_LINK(ifilter, in, 1);
906
907     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
908     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
909     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
910     default: av_assert0(0);
911     }
912 }
913
914 static int configure_filtergraph(FilterGraph *fg)
915 {
916     AVFilterInOut *inputs, *outputs, *cur;
917     int ret, i, init = !fg->graph, simple = !fg->graph_desc;
918     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
919                                       fg->graph_desc;
920
921     avfilter_graph_free(&fg->graph);
922     if (!(fg->graph = avfilter_graph_alloc()))
923         return AVERROR(ENOMEM);
924
925     if (simple) {
926         OutputStream *ost = fg->outputs[0]->ost;
927         char args[255];
928         snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
929         fg->graph->scale_sws_opts = av_strdup(args);
930     }
931
932     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
933         return ret;
934
935     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
936         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
937                "exactly one input and output.\n", graph_desc);
938         return AVERROR(EINVAL);
939     }
940
941     for (cur = inputs; !simple && init && cur; cur = cur->next)
942         init_input_filter(fg, cur);
943
944     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
945         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
946             return ret;
947     avfilter_inout_free(&inputs);
948
949     if (!init || simple) {
950         /* we already know the mappings between lavfi outputs and output streams,
951          * so we can finish the setup */
952         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
953             configure_output_filter(fg, fg->outputs[i], cur);
954         avfilter_inout_free(&outputs);
955
956         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
957             return ret;
958     } else {
959         /* wait until output mappings are processed */
960         for (cur = outputs; cur;) {
961             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
962                                      &fg->nb_outputs, fg->nb_outputs + 1);
963             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
964                 exit_program(1);
965             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
966             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
967             cur = cur->next;
968             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
969         }
970     }
971
972     return 0;
973 }
974
975 static int configure_complex_filters(void)
976 {
977     int i, ret = 0;
978
979     for (i = 0; i < nb_filtergraphs; i++)
980         if (!filtergraphs[i]->graph &&
981             (ret = configure_filtergraph(filtergraphs[i])) < 0)
982             return ret;
983     return 0;
984 }
985
986 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
987 {
988     int i;
989     for (i = 0; i < fg->nb_inputs; i++)
990         if (fg->inputs[i]->ist == ist)
991             return 1;
992     return 0;
993 }
994
995 static void term_exit(void)
996 {
997     av_log(NULL, AV_LOG_QUIET, "");
998 }
999
1000 static volatile int received_sigterm = 0;
1001 static volatile int received_nb_signals = 0;
1002
1003 static void
1004 sigterm_handler(int sig)
1005 {
1006     received_sigterm = sig;
1007     received_nb_signals++;
1008     term_exit();
1009 }
1010
1011 static void term_init(void)
1012 {
1013     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1014     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1015 #ifdef SIGXCPU
1016     signal(SIGXCPU, sigterm_handler);
1017 #endif
1018 }
1019
1020 static int decode_interrupt_cb(void *ctx)
1021 {
1022     return received_nb_signals > 1;
1023 }
1024
1025 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1026
1027 void exit_program(int ret)
1028 {
1029     int i, j;
1030
1031     for (i = 0; i < nb_filtergraphs; i++) {
1032         avfilter_graph_free(&filtergraphs[i]->graph);
1033         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
1034             av_freep(&filtergraphs[i]->inputs[j]->name);
1035             av_freep(&filtergraphs[i]->inputs[j]);
1036         }
1037         av_freep(&filtergraphs[i]->inputs);
1038         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
1039             av_freep(&filtergraphs[i]->outputs[j]->name);
1040             av_freep(&filtergraphs[i]->outputs[j]);
1041         }
1042         av_freep(&filtergraphs[i]->outputs);
1043         av_freep(&filtergraphs[i]);
1044     }
1045     av_freep(&filtergraphs);
1046
1047     /* close files */
1048     for (i = 0; i < nb_output_files; i++) {
1049         AVFormatContext *s = output_files[i]->ctx;
1050         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1051             avio_close(s->pb);
1052         avformat_free_context(s);
1053         av_dict_free(&output_files[i]->opts);
1054         av_freep(&output_files[i]);
1055     }
1056     for (i = 0; i < nb_output_streams; i++) {
1057         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1058         while (bsfc) {
1059             AVBitStreamFilterContext *next = bsfc->next;
1060             av_bitstream_filter_close(bsfc);
1061             bsfc = next;
1062         }
1063         output_streams[i]->bitstream_filters = NULL;
1064
1065         av_freep(&output_streams[i]->avfilter);
1066         av_freep(&output_streams[i]->filtered_frame);
1067         av_freep(&output_streams[i]);
1068     }
1069     for (i = 0; i < nb_input_files; i++) {
1070         avformat_close_input(&input_files[i]->ctx);
1071         av_freep(&input_files[i]);
1072     }
1073     for (i = 0; i < nb_input_streams; i++) {
1074         av_freep(&input_streams[i]->decoded_frame);
1075         av_dict_free(&input_streams[i]->opts);
1076         free_buffer_pool(&input_streams[i]->buffer_pool);
1077         av_freep(&input_streams[i]->filters);
1078         av_freep(&input_streams[i]);
1079     }
1080
1081     if (vstats_file)
1082         fclose(vstats_file);
1083     av_free(vstats_filename);
1084
1085     av_freep(&input_streams);
1086     av_freep(&input_files);
1087     av_freep(&output_streams);
1088     av_freep(&output_files);
1089
1090     uninit_opts();
1091
1092     avfilter_uninit();
1093     avformat_network_deinit();
1094
1095     if (received_sigterm) {
1096         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1097                (int) received_sigterm);
1098         exit (255);
1099     }
1100
1101     exit(ret);
1102 }
1103
1104 static void assert_avoptions(AVDictionary *m)
1105 {
1106     AVDictionaryEntry *t;
1107     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1108         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1109         exit_program(1);
1110     }
1111 }
1112
1113 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1114 {
1115     const char *codec_string = encoder ? "encoder" : "decoder";
1116     AVCodec *codec;
1117     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1118         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1119         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1120                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1121                 codec_string, c->codec->name);
1122         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1123         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1124             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1125                    codec_string, codec->name);
1126         exit_program(1);
1127     }
1128 }
1129
1130 /**
1131  * Update the requested input sample format based on the output sample format.
1132  * This is currently only used to request float output from decoders which
1133  * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
1134  * Ideally this will be removed in the future when decoders do not do format
1135  * conversion and only output in their native format.
1136  */
1137 static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
1138                               AVCodecContext *enc)
1139 {
1140     /* if sample formats match or a decoder sample format has already been
1141        requested, just return */
1142     if (enc->sample_fmt == dec->sample_fmt ||
1143         dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
1144         return;
1145
1146     /* if decoder supports more than one output format */
1147     if (dec_codec && dec_codec->sample_fmts &&
1148         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
1149         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
1150         const enum AVSampleFormat *p;
1151         int min_dec = -1, min_inc = -1;
1152
1153         /* find a matching sample format in the encoder */
1154         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
1155             if (*p == enc->sample_fmt) {
1156                 dec->request_sample_fmt = *p;
1157                 return;
1158             } else if (*p > enc->sample_fmt) {
1159                 min_inc = FFMIN(min_inc, *p - enc->sample_fmt);
1160             } else
1161                 min_dec = FFMIN(min_dec, enc->sample_fmt - *p);
1162         }
1163
1164         /* if none match, provide the one that matches quality closest */
1165         dec->request_sample_fmt = min_inc > 0 ? enc->sample_fmt + min_inc :
1166                                   enc->sample_fmt - min_dec;
1167     }
1168 }
1169
1170 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1171 {
1172     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1173     AVCodecContext          *avctx = ost->st->codec;
1174     int ret;
1175
1176     /*
1177      * Audio encoders may split the packets --  #frames in != #packets out.
1178      * But there is no reordering, so we can limit the number of output packets
1179      * by simply dropping them here.
1180      * Counting encoded video frames needs to be done separately because of
1181      * reordering, see do_video_out()
1182      */
1183     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1184         if (ost->frame_number >= ost->max_frames) {
1185             av_free_packet(pkt);
1186             return;
1187         }
1188         ost->frame_number++;
1189     }
1190
1191     while (bsfc) {
1192         AVPacket new_pkt = *pkt;
1193         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1194                                            &new_pkt.data, &new_pkt.size,
1195                                            pkt->data, pkt->size,
1196                                            pkt->flags & AV_PKT_FLAG_KEY);
1197         if (a > 0) {
1198             av_free_packet(pkt);
1199             new_pkt.destruct = av_destruct_packet;
1200         } else if (a < 0) {
1201             av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
1202                    bsfc->filter->name, pkt->stream_index,
1203                    avctx->codec ? avctx->codec->name : "copy");
1204             print_error("", a);
1205             if (exit_on_error)
1206                 exit_program(1);
1207         }
1208         *pkt = new_pkt;
1209
1210         bsfc = bsfc->next;
1211     }
1212
1213     pkt->stream_index = ost->index;
1214     ret = av_interleaved_write_frame(s, pkt);
1215     if (ret < 0) {
1216         print_error("av_interleaved_write_frame()", ret);
1217         exit_program(1);
1218     }
1219 }
1220
1221 static int check_recording_time(OutputStream *ost)
1222 {
1223     OutputFile *of = output_files[ost->file_index];
1224
1225     if (of->recording_time != INT64_MAX &&
1226         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
1227                       AV_TIME_BASE_Q) >= 0) {
1228         ost->is_past_recording_time = 1;
1229         return 0;
1230     }
1231     return 1;
1232 }
1233
1234 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1235                          AVFrame *frame)
1236 {
1237     AVCodecContext *enc = ost->st->codec;
1238     AVPacket pkt;
1239     int got_packet = 0;
1240
1241     av_init_packet(&pkt);
1242     pkt.data = NULL;
1243     pkt.size = 0;
1244
1245     if (!check_recording_time(ost))
1246         return;
1247
1248     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
1249         frame->pts = ost->sync_opts;
1250     ost->sync_opts = frame->pts + frame->nb_samples;
1251
1252     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1253         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
1254         exit_program(1);
1255     }
1256
1257     if (got_packet) {
1258         if (pkt.pts != AV_NOPTS_VALUE)
1259             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1260         if (pkt.dts != AV_NOPTS_VALUE)
1261             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1262         if (pkt.duration > 0)
1263             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1264
1265         write_frame(s, &pkt, ost);
1266
1267         audio_size += pkt.size;
1268     }
1269 }
1270
1271 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1272 {
1273     AVCodecContext *dec;
1274     AVPicture *picture2;
1275     AVPicture picture_tmp;
1276     uint8_t *buf = 0;
1277
1278     dec = ist->st->codec;
1279
1280     /* deinterlace : must be done before any resize */
1281     if (do_deinterlace) {
1282         int size;
1283
1284         /* create temporary picture */
1285         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1286         buf  = av_malloc(size);
1287         if (!buf)
1288             return;
1289
1290         picture2 = &picture_tmp;
1291         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1292
1293         if (avpicture_deinterlace(picture2, picture,
1294                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1295             /* if error, do not deinterlace */
1296             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1297             av_free(buf);
1298             buf = NULL;
1299             picture2 = picture;
1300         }
1301     } else {
1302         picture2 = picture;
1303     }
1304
1305     if (picture != picture2)
1306         *picture = *picture2;
1307     *bufp = buf;
1308 }
1309
1310 static void do_subtitle_out(AVFormatContext *s,
1311                             OutputStream *ost,
1312                             InputStream *ist,
1313                             AVSubtitle *sub,
1314                             int64_t pts)
1315 {
1316     static uint8_t *subtitle_out = NULL;
1317     int subtitle_out_max_size = 1024 * 1024;
1318     int subtitle_out_size, nb, i;
1319     AVCodecContext *enc;
1320     AVPacket pkt;
1321
1322     if (pts == AV_NOPTS_VALUE) {
1323         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1324         if (exit_on_error)
1325             exit_program(1);
1326         return;
1327     }
1328
1329     enc = ost->st->codec;
1330
1331     if (!subtitle_out) {
1332         subtitle_out = av_malloc(subtitle_out_max_size);
1333     }
1334
1335     /* Note: DVB subtitle need one packet to draw them and one other
1336        packet to clear them */
1337     /* XXX: signal it in the codec context ? */
1338     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1339         nb = 2;
1340     else
1341         nb = 1;
1342
1343     for (i = 0; i < nb; i++) {
1344         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1345         if (!check_recording_time(ost))
1346             return;
1347
1348         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1349         // start_display_time is required to be 0
1350         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1351         sub->end_display_time  -= sub->start_display_time;
1352         sub->start_display_time = 0;
1353         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1354                                                     subtitle_out_max_size, sub);
1355         if (subtitle_out_size < 0) {
1356             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1357             exit_program(1);
1358         }
1359
1360         av_init_packet(&pkt);
1361         pkt.data = subtitle_out;
1362         pkt.size = subtitle_out_size;
1363         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1364         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1365             /* XXX: the pts correction is handled here. Maybe handling
1366                it in the codec would be better */
1367             if (i == 0)
1368                 pkt.pts += 90 * sub->start_display_time;
1369             else
1370                 pkt.pts += 90 * sub->end_display_time;
1371         }
1372         write_frame(s, &pkt, ost);
1373     }
1374 }
1375
1376 static void do_video_out(AVFormatContext *s,
1377                          OutputStream *ost,
1378                          AVFrame *in_picture,
1379                          int *frame_size, float quality)
1380 {
1381     int ret, format_video_sync;
1382     AVPacket pkt;
1383     AVCodecContext *enc = ost->st->codec;
1384
1385     *frame_size = 0;
1386
1387     format_video_sync = video_sync_method;
1388     if (format_video_sync == VSYNC_AUTO)
1389         format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
1390                             (s->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
1391     if (format_video_sync != VSYNC_PASSTHROUGH &&
1392         ost->frame_number &&
1393         in_picture->pts != AV_NOPTS_VALUE &&
1394         in_picture->pts < ost->sync_opts) {
1395         nb_frames_drop++;
1396         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1397         return;
1398     }
1399
1400     if (in_picture->pts == AV_NOPTS_VALUE)
1401         in_picture->pts = ost->sync_opts;
1402     ost->sync_opts = in_picture->pts;
1403
1404
1405     if (!ost->frame_number)
1406         ost->first_pts = in_picture->pts;
1407
1408     av_init_packet(&pkt);
1409     pkt.data = NULL;
1410     pkt.size = 0;
1411
1412     if (!check_recording_time(ost) ||
1413         ost->frame_number >= ost->max_frames)
1414         return;
1415
1416     if (s->oformat->flags & AVFMT_RAWPICTURE &&
1417         enc->codec->id == CODEC_ID_RAWVIDEO) {
1418         /* raw pictures are written as AVPicture structure to
1419            avoid any copies. We support temporarily the older
1420            method. */
1421         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1422         enc->coded_frame->top_field_first  = in_picture->top_field_first;
1423         pkt.data   = (uint8_t *)in_picture;
1424         pkt.size   =  sizeof(AVPicture);
1425         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
1426         pkt.flags |= AV_PKT_FLAG_KEY;
1427
1428         write_frame(s, &pkt, ost);
1429     } else {
1430         int got_packet;
1431         AVFrame big_picture;
1432
1433         big_picture = *in_picture;
1434         /* better than nothing: use input picture interlaced
1435            settings */
1436         big_picture.interlaced_frame = in_picture->interlaced_frame;
1437         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1438             if (ost->top_field_first == -1)
1439                 big_picture.top_field_first = in_picture->top_field_first;
1440             else
1441                 big_picture.top_field_first = !!ost->top_field_first;
1442         }
1443
1444         /* handles same_quant here. This is not correct because it may
1445            not be a global option */
1446         big_picture.quality = quality;
1447         if (!enc->me_threshold)
1448             big_picture.pict_type = 0;
1449         if (ost->forced_kf_index < ost->forced_kf_count &&
1450             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1451             big_picture.pict_type = AV_PICTURE_TYPE_I;
1452             ost->forced_kf_index++;
1453         }
1454         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
1455         if (ret < 0) {
1456             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1457             exit_program(1);
1458         }
1459
1460         if (got_packet) {
1461             if (pkt.pts != AV_NOPTS_VALUE)
1462                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1463             if (pkt.dts != AV_NOPTS_VALUE)
1464                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1465
1466             write_frame(s, &pkt, ost);
1467             *frame_size = pkt.size;
1468             video_size += pkt.size;
1469
1470             /* if two pass, output log */
1471             if (ost->logfile && enc->stats_out) {
1472                 fprintf(ost->logfile, "%s", enc->stats_out);
1473             }
1474         }
1475     }
1476     ost->sync_opts++;
1477     /*
1478      * For video, number of frames in == number of packets out.
1479      * But there may be reordering, so we can't throw away frames on encoder
1480      * flush, we need to limit them here, before they go into encoder.
1481      */
1482     ost->frame_number++;
1483 }
1484
1485 static double psnr(double d)
1486 {
1487     return -10.0 * log(d) / log(10.0);
1488 }
1489
1490 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1491                            int frame_size)
1492 {
1493     AVCodecContext *enc;
1494     int frame_number;
1495     double ti1, bitrate, avg_bitrate;
1496
1497     /* this is executed just the first time do_video_stats is called */
1498     if (!vstats_file) {
1499         vstats_file = fopen(vstats_filename, "w");
1500         if (!vstats_file) {
1501             perror("fopen");
1502             exit_program(1);
1503         }
1504     }
1505
1506     enc = ost->st->codec;
1507     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1508         frame_number = ost->frame_number;
1509         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1510         if (enc->flags&CODEC_FLAG_PSNR)
1511             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1512
1513         fprintf(vstats_file,"f_size= %6d ", frame_size);
1514         /* compute pts value */
1515         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1516         if (ti1 < 0.01)
1517             ti1 = 0.01;
1518
1519         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1520         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1521         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1522                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1523         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1524     }
1525 }
1526
1527 /* check for new output on any of the filtergraphs */
1528 static int poll_filters(void)
1529 {
1530     AVFilterBufferRef *picref;
1531     AVFrame *filtered_frame = NULL;
1532     int i, frame_size;
1533
1534     for (i = 0; i < nb_output_streams; i++) {
1535         OutputStream *ost = output_streams[i];
1536         OutputFile    *of = output_files[ost->file_index];
1537         int ret = 0;
1538
1539         if (!ost->filter)
1540             continue;
1541
1542         if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
1543             return AVERROR(ENOMEM);
1544         } else
1545             avcodec_get_frame_defaults(ost->filtered_frame);
1546         filtered_frame = ost->filtered_frame;
1547
1548         while (ret >= 0 && !ost->is_past_recording_time) {
1549             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1550                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1551                 ret = av_buffersink_read_samples(ost->filter->filter, &picref,
1552                                                  ost->st->codec->frame_size);
1553             else
1554                 ret = av_buffersink_read(ost->filter->filter, &picref);
1555
1556             if (ret < 0)
1557                 break;
1558
1559             avfilter_copy_buf_props(filtered_frame, picref);
1560             if (picref->pts != AV_NOPTS_VALUE)
1561                 filtered_frame->pts = av_rescale_q(picref->pts,
1562                                                    ost->filter->filter->inputs[0]->time_base,
1563                                                    ost->st->codec->time_base) -
1564                                       av_rescale_q(of->start_time,
1565                                                    AV_TIME_BASE_Q,
1566                                                    ost->st->codec->time_base);
1567
1568             if (of->start_time && filtered_frame->pts < of->start_time) {
1569                 avfilter_unref_buffer(picref);
1570                 continue;
1571             }
1572
1573             switch (ost->filter->filter->inputs[0]->type) {
1574             case AVMEDIA_TYPE_VIDEO:
1575                 if (!ost->frame_aspect_ratio)
1576                     ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
1577
1578                 do_video_out(of->ctx, ost, filtered_frame, &frame_size,
1579                              same_quant ? ost->last_quality :
1580                                           ost->st->codec->global_quality);
1581                 if (vstats_filename && frame_size)
1582                     do_video_stats(of->ctx, ost, frame_size);
1583                 break;
1584             case AVMEDIA_TYPE_AUDIO:
1585                 do_audio_out(of->ctx, ost, filtered_frame);
1586                 break;
1587             default:
1588                 // TODO support subtitle filters
1589                 av_assert0(0);
1590             }
1591
1592             avfilter_unref_buffer(picref);
1593         }
1594     }
1595     return 0;
1596 }
1597
1598 static void print_report(int is_last_report, int64_t timer_start)
1599 {
1600     char buf[1024];
1601     OutputStream *ost;
1602     AVFormatContext *oc;
1603     int64_t total_size;
1604     AVCodecContext *enc;
1605     int frame_number, vid, i;
1606     double bitrate, ti1, pts;
1607     static int64_t last_time = -1;
1608     static int qp_histogram[52];
1609
1610     if (!print_stats && !is_last_report)
1611         return;
1612
1613     if (!is_last_report) {
1614         int64_t cur_time;
1615         /* display the report every 0.5 seconds */
1616         cur_time = av_gettime();
1617         if (last_time == -1) {
1618             last_time = cur_time;
1619             return;
1620         }
1621         if ((cur_time - last_time) < 500000)
1622             return;
1623         last_time = cur_time;
1624     }
1625
1626
1627     oc = output_files[0]->ctx;
1628
1629     total_size = avio_size(oc->pb);
1630     if (total_size < 0) // FIXME improve avio_size() so it works with non seekable output too
1631         total_size = avio_tell(oc->pb);
1632
1633     buf[0] = '\0';
1634     ti1 = 1e10;
1635     vid = 0;
1636     for (i = 0; i < nb_output_streams; i++) {
1637         float q = -1;
1638         ost = output_streams[i];
1639         enc = ost->st->codec;
1640         if (!ost->stream_copy && enc->coded_frame)
1641             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1642         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1643             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1644         }
1645         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1646             float t = (av_gettime() - timer_start) / 1000000.0;
1647
1648             frame_number = ost->frame_number;
1649             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
1650                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
1651             if (is_last_report)
1652                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1653             if (qp_hist) {
1654                 int j;
1655                 int qp = lrintf(q);
1656                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1657                     qp_histogram[qp]++;
1658                 for (j = 0; j < 32; j++)
1659                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
1660             }
1661             if (enc->flags&CODEC_FLAG_PSNR) {
1662                 int j;
1663                 double error, error_sum = 0;
1664                 double scale, scale_sum = 0;
1665                 char type[3] = { 'Y','U','V' };
1666                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1667                 for (j = 0; j < 3; j++) {
1668                     if (is_last_report) {
1669                         error = enc->error[j];
1670                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1671                     } else {
1672                         error = enc->coded_frame->error[j];
1673                         scale = enc->width * enc->height * 255.0 * 255.0;
1674                     }
1675                     if (j)
1676                         scale /= 4;
1677                     error_sum += error;
1678                     scale_sum += scale;
1679                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
1680                 }
1681                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1682             }
1683             vid = 1;
1684         }
1685         /* compute min output value */
1686         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
1687         if ((pts < ti1) && (pts > 0))
1688             ti1 = pts;
1689     }
1690     if (ti1 < 0.01)
1691         ti1 = 0.01;
1692
1693     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
1694
1695     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1696             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
1697             (double)total_size / 1024, ti1, bitrate);
1698
1699     if (nb_frames_dup || nb_frames_drop)
1700         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1701                 nb_frames_dup, nb_frames_drop);
1702
1703     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1704
1705     fflush(stderr);
1706
1707     if (is_last_report) {
1708         int64_t raw= audio_size + video_size + extra_size;
1709         av_log(NULL, AV_LOG_INFO, "\n");
1710         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
1711                video_size / 1024.0,
1712                audio_size / 1024.0,
1713                extra_size / 1024.0,
1714                100.0 * (total_size - raw) / raw
1715         );
1716     }
1717 }
1718
1719 static void flush_encoders(void)
1720 {
1721     int i, ret;
1722
1723     for (i = 0; i < nb_output_streams; i++) {
1724         OutputStream   *ost = output_streams[i];
1725         AVCodecContext *enc = ost->st->codec;
1726         AVFormatContext *os = output_files[ost->file_index]->ctx;
1727         int stop_encoding = 0;
1728
1729         if (!ost->encoding_needed)
1730             continue;
1731
1732         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1733             continue;
1734         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
1735             continue;
1736
1737         for (;;) {
1738             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1739             const char *desc;
1740             int64_t *size;
1741
1742             switch (ost->st->codec->codec_type) {
1743             case AVMEDIA_TYPE_AUDIO:
1744                 encode = avcodec_encode_audio2;
1745                 desc   = "Audio";
1746                 size   = &audio_size;
1747                 break;
1748             case AVMEDIA_TYPE_VIDEO:
1749                 encode = avcodec_encode_video2;
1750                 desc   = "Video";
1751                 size   = &video_size;
1752                 break;
1753             default:
1754                 stop_encoding = 1;
1755             }
1756
1757             if (encode) {
1758                 AVPacket pkt;
1759                 int got_packet;
1760                 av_init_packet(&pkt);
1761                 pkt.data = NULL;
1762                 pkt.size = 0;
1763
1764                 ret = encode(enc, &pkt, NULL, &got_packet);
1765                 if (ret < 0) {
1766                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1767                     exit_program(1);
1768                 }
1769                 *size += ret;
1770                 if (ost->logfile && enc->stats_out) {
1771                     fprintf(ost->logfile, "%s", enc->stats_out);
1772                 }
1773                 if (!got_packet) {
1774                     stop_encoding = 1;
1775                     break;
1776                 }
1777                 if (pkt.pts != AV_NOPTS_VALUE)
1778                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1779                 if (pkt.dts != AV_NOPTS_VALUE)
1780                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1781                 write_frame(os, &pkt, ost);
1782             }
1783
1784             if (stop_encoding)
1785                 break;
1786         }
1787     }
1788 }
1789
1790 /*
1791  * Check whether a packet from ist should be written into ost at this time
1792  */
1793 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1794 {
1795     OutputFile *of = output_files[ost->file_index];
1796     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1797
1798     if (ost->source_index != ist_index)
1799         return 0;
1800
1801     if (of->start_time && ist->last_dts < of->start_time)
1802         return 0;
1803
1804     return 1;
1805 }
1806
1807 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1808 {
1809     OutputFile *of = output_files[ost->file_index];
1810     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
1811     AVPacket opkt;
1812
1813     av_init_packet(&opkt);
1814
1815     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1816         !ost->copy_initial_nonkeyframes)
1817         return;
1818
1819     if (of->recording_time != INT64_MAX &&
1820         ist->last_dts >= of->recording_time + of->start_time) {
1821         ost->is_past_recording_time = 1;
1822         return;
1823     }
1824
1825     /* force the input stream PTS */
1826     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1827         audio_size += pkt->size;
1828     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1829         video_size += pkt->size;
1830         ost->sync_opts++;
1831     }
1832
1833     if (pkt->pts != AV_NOPTS_VALUE)
1834         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1835     else
1836         opkt.pts = AV_NOPTS_VALUE;
1837
1838     if (pkt->dts == AV_NOPTS_VALUE)
1839         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
1840     else
1841         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1842     opkt.dts -= ost_tb_start_time;
1843
1844     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1845     opkt.flags    = pkt->flags;
1846
1847     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1848     if (  ost->st->codec->codec_id != CODEC_ID_H264
1849        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
1850        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
1851        && ost->st->codec->codec_id != CODEC_ID_VC1
1852        ) {
1853         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1854             opkt.destruct = av_destruct_packet;
1855     } else {
1856         opkt.data = pkt->data;
1857         opkt.size = pkt->size;
1858     }
1859
1860     write_frame(of->ctx, &opkt, ost);
1861     ost->st->codec->frame_number++;
1862     av_free_packet(&opkt);
1863 }
1864
1865 static void rate_emu_sleep(InputStream *ist)
1866 {
1867     if (input_files[ist->file_index]->rate_emu) {
1868         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
1869         int64_t now = av_gettime() - ist->start;
1870         if (pts > now)
1871             av_usleep(pts - now);
1872     }
1873 }
1874
1875 static int guess_input_channel_layout(InputStream *ist)
1876 {
1877     AVCodecContext *dec = ist->st->codec;
1878
1879     if (!dec->channel_layout) {
1880         char layout_name[256];
1881
1882         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1883         if (!dec->channel_layout)
1884             return 0;
1885         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1886                                      dec->channels, dec->channel_layout);
1887         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1888                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1889     }
1890     return 1;
1891 }
1892
1893 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1894 {
1895     AVFrame *decoded_frame;
1896     AVCodecContext *avctx = ist->st->codec;
1897     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
1898     int i, ret, resample_changed;
1899
1900     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1901         return AVERROR(ENOMEM);
1902     else
1903         avcodec_get_frame_defaults(ist->decoded_frame);
1904     decoded_frame = ist->decoded_frame;
1905
1906     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1907     if (ret < 0) {
1908         return ret;
1909     }
1910
1911     if (!*got_output) {
1912         /* no audio frame */
1913         if (!pkt->size)
1914             for (i = 0; i < ist->nb_filters; i++)
1915                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1916         return ret;
1917     }
1918
1919     /* if the decoder provides a pts, use it instead of the last packet pts.
1920        the decoder could be delaying output by a packet or more. */
1921     if (decoded_frame->pts != AV_NOPTS_VALUE)
1922         ist->next_dts = decoded_frame->pts;
1923     else if (pkt->pts != AV_NOPTS_VALUE) {
1924         decoded_frame->pts = pkt->pts;
1925         pkt->pts           = AV_NOPTS_VALUE;
1926     }
1927
1928     // preprocess audio (volume)
1929     if (audio_volume != 256) {
1930         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
1931         void *samples = decoded_frame->data[0];
1932         switch (avctx->sample_fmt) {
1933         case AV_SAMPLE_FMT_U8:
1934         {
1935             uint8_t *volp = samples;
1936             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1937                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
1938                 *volp++ = av_clip_uint8(v);
1939             }
1940             break;
1941         }
1942         case AV_SAMPLE_FMT_S16:
1943         {
1944             int16_t *volp = samples;
1945             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1946                 int v = ((*volp) * audio_volume + 128) >> 8;
1947                 *volp++ = av_clip_int16(v);
1948             }
1949             break;
1950         }
1951         case AV_SAMPLE_FMT_S32:
1952         {
1953             int32_t *volp = samples;
1954             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1955                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
1956                 *volp++ = av_clipl_int32(v);
1957             }
1958             break;
1959         }
1960         case AV_SAMPLE_FMT_FLT:
1961         {
1962             float *volp = samples;
1963             float scale = audio_volume / 256.f;
1964             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1965                 *volp++ *= scale;
1966             }
1967             break;
1968         }
1969         case AV_SAMPLE_FMT_DBL:
1970         {
1971             double *volp = samples;
1972             double scale = audio_volume / 256.;
1973             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1974                 *volp++ *= scale;
1975             }
1976             break;
1977         }
1978         default:
1979             av_log(NULL, AV_LOG_FATAL,
1980                    "Audio volume adjustment on sample format %s is not supported.\n",
1981                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
1982             exit_program(1);
1983         }
1984     }
1985
1986     rate_emu_sleep(ist);
1987
1988     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1989                        ist->resample_channels       != avctx->channels               ||
1990                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1991                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1992     if (resample_changed) {
1993         char layout1[64], layout2[64];
1994
1995         if (!guess_input_channel_layout(ist)) {
1996             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1997                    "layout for Input Stream #%d.%d\n", ist->file_index,
1998                    ist->st->index);
1999             exit_program(1);
2000         }
2001         decoded_frame->channel_layout = avctx->channel_layout;
2002
2003         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
2004                                      ist->resample_channel_layout);
2005         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
2006                                      decoded_frame->channel_layout);
2007
2008         av_log(NULL, AV_LOG_INFO,
2009                "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",
2010                ist->file_index, ist->st->index,
2011                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2012                ist->resample_channels, layout1,
2013                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2014                avctx->channels, layout2);
2015
2016         ist->resample_sample_fmt     = decoded_frame->format;
2017         ist->resample_sample_rate    = decoded_frame->sample_rate;
2018         ist->resample_channel_layout = decoded_frame->channel_layout;
2019         ist->resample_channels       = avctx->channels;
2020
2021         for (i = 0; i < nb_filtergraphs; i++)
2022             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2023                 configure_filtergraph(filtergraphs[i]) < 0) {
2024                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2025                 exit_program(1);
2026             }
2027     }
2028
2029     for (i = 0; i < ist->nb_filters; i++)
2030         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
2031
2032     return ret;
2033 }
2034
2035 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
2036 {
2037     AVFrame *decoded_frame;
2038     void *buffer_to_free = NULL;
2039     int i, ret = 0, resample_changed;
2040     float quality;
2041
2042     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2043         return AVERROR(ENOMEM);
2044     else
2045         avcodec_get_frame_defaults(ist->decoded_frame);
2046     decoded_frame = ist->decoded_frame;
2047
2048     ret = avcodec_decode_video2(ist->st->codec,
2049                                 decoded_frame, got_output, pkt);
2050     if (ret < 0)
2051         return ret;
2052
2053     quality = same_quant ? decoded_frame->quality : 0;
2054     if (!*got_output) {
2055         /* no picture yet */
2056         if (!pkt->size)
2057             for (i = 0; i < ist->nb_filters; i++)
2058                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
2059         return ret;
2060     }
2061     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
2062                                            decoded_frame->pkt_dts);
2063     pkt->size = 0;
2064     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2065
2066     rate_emu_sleep(ist);
2067
2068     if (ist->st->sample_aspect_ratio.num)
2069         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2070
2071     resample_changed = ist->resample_width   != decoded_frame->width  ||
2072                        ist->resample_height  != decoded_frame->height ||
2073                        ist->resample_pix_fmt != decoded_frame->format;
2074     if (resample_changed) {
2075         av_log(NULL, AV_LOG_INFO,
2076                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2077                ist->file_index, ist->st->index,
2078                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2079                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2080
2081         ist->resample_width   = decoded_frame->width;
2082         ist->resample_height  = decoded_frame->height;
2083         ist->resample_pix_fmt = decoded_frame->format;
2084
2085         for (i = 0; i < nb_filtergraphs; i++)
2086             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2087                 configure_filtergraph(filtergraphs[i]) < 0) {
2088                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2089                 exit_program(1);
2090             }
2091     }
2092
2093     for (i = 0; i < ist->nb_filters; i++) {
2094         // XXX what an ugly hack
2095         if (ist->filters[i]->graph->nb_outputs == 1)
2096             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2097
2098         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
2099             FrameBuffer      *buf = decoded_frame->opaque;
2100             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2101                                         decoded_frame->data, decoded_frame->linesize,
2102                                         AV_PERM_READ | AV_PERM_PRESERVE,
2103                                         ist->st->codec->width, ist->st->codec->height,
2104                                         ist->st->codec->pix_fmt);
2105
2106             avfilter_copy_frame_props(fb, decoded_frame);
2107             fb->buf->priv           = buf;
2108             fb->buf->free           = filter_release_buffer;
2109
2110             buf->refcount++;
2111             av_buffersrc_buffer(ist->filters[i]->filter, fb);
2112         } else
2113             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
2114     }
2115
2116     av_free(buffer_to_free);
2117     return ret;
2118 }
2119
2120 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2121 {
2122     AVSubtitle subtitle;
2123     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2124                                           &subtitle, got_output, pkt);
2125     if (ret < 0)
2126         return ret;
2127     if (!*got_output)
2128         return ret;
2129
2130     rate_emu_sleep(ist);
2131
2132     for (i = 0; i < nb_output_streams; i++) {
2133         OutputStream *ost = output_streams[i];
2134
2135         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2136             continue;
2137
2138         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2139     }
2140
2141     avsubtitle_free(&subtitle);
2142     return ret;
2143 }
2144
2145 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2146 static int output_packet(InputStream *ist, const AVPacket *pkt)
2147 {
2148     int i;
2149     int got_output;
2150     AVPacket avpkt;
2151
2152     if (ist->next_dts == AV_NOPTS_VALUE)
2153         ist->next_dts = ist->last_dts;
2154
2155     if (pkt == NULL) {
2156         /* EOF handling */
2157         av_init_packet(&avpkt);
2158         avpkt.data = NULL;
2159         avpkt.size = 0;
2160         goto handle_eof;
2161     } else {
2162         avpkt = *pkt;
2163     }
2164
2165     if (pkt->dts != AV_NOPTS_VALUE)
2166         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2167
2168     // while we have more to decode or while the decoder did output something on EOF
2169     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2170         int ret = 0;
2171     handle_eof:
2172
2173         ist->last_dts = ist->next_dts;
2174
2175         if (avpkt.size && avpkt.size != pkt->size) {
2176             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2177                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2178             ist->showed_multi_packet_warning = 1;
2179         }
2180
2181         switch (ist->st->codec->codec_type) {
2182         case AVMEDIA_TYPE_AUDIO:
2183             ret = decode_audio    (ist, &avpkt, &got_output);
2184             break;
2185         case AVMEDIA_TYPE_VIDEO:
2186             ret = decode_video    (ist, &avpkt, &got_output);
2187             if (avpkt.duration)
2188                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2189             else if (ist->st->r_frame_rate.num)
2190                 ist->next_dts += av_rescale_q(1, (AVRational){ist->st->r_frame_rate.den,
2191                                                               ist->st->r_frame_rate.num},
2192                                               AV_TIME_BASE_Q);
2193             else if (ist->st->codec->time_base.num != 0) {
2194                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
2195                                                    ist->st->codec->ticks_per_frame;
2196                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
2197             }
2198             break;
2199         case AVMEDIA_TYPE_SUBTITLE:
2200             ret = transcode_subtitles(ist, &avpkt, &got_output);
2201             break;
2202         default:
2203             return -1;
2204         }
2205
2206         if (ret < 0)
2207             return ret;
2208         // touch data and size only if not EOF
2209         if (pkt) {
2210             avpkt.data += ret;
2211             avpkt.size -= ret;
2212         }
2213         if (!got_output) {
2214             continue;
2215         }
2216     }
2217
2218     /* handle stream copy */
2219     if (!ist->decoding_needed) {
2220         rate_emu_sleep(ist);
2221         ist->last_dts = ist->next_dts;
2222         switch (ist->st->codec->codec_type) {
2223         case AVMEDIA_TYPE_AUDIO:
2224             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2225                              ist->st->codec->sample_rate;
2226             break;
2227         case AVMEDIA_TYPE_VIDEO:
2228             if (ist->st->codec->time_base.num != 0) {
2229                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2230                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2231                                   ist->st->codec->time_base.num * ticks) /
2232                                   ist->st->codec->time_base.den;
2233             }
2234             break;
2235         }
2236     }
2237     for (i = 0; pkt && i < nb_output_streams; i++) {
2238         OutputStream *ost = output_streams[i];
2239
2240         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2241             continue;
2242
2243         do_streamcopy(ist, ost, pkt);
2244     }
2245
2246     return 0;
2247 }
2248
2249 static void print_sdp(void)
2250 {
2251     char sdp[2048];
2252     int i;
2253     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2254
2255     if (!avc)
2256         exit_program(1);
2257     for (i = 0; i < nb_output_files; i++)
2258         avc[i] = output_files[i]->ctx;
2259
2260     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2261     printf("SDP:\n%s\n", sdp);
2262     fflush(stdout);
2263     av_freep(&avc);
2264 }
2265
2266 static int init_input_stream(int ist_index, char *error, int error_len)
2267 {
2268     int i;
2269     InputStream *ist = input_streams[ist_index];
2270     if (ist->decoding_needed) {
2271         AVCodec *codec = ist->dec;
2272         if (!codec) {
2273             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
2274                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
2275             return AVERROR(EINVAL);
2276         }
2277
2278         /* update requested sample format for the decoder based on the
2279            corresponding encoder sample format */
2280         for (i = 0; i < nb_output_streams; i++) {
2281             OutputStream *ost = output_streams[i];
2282             if (ost->source_index == ist_index) {
2283                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
2284                 break;
2285             }
2286         }
2287
2288         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
2289             ist->st->codec->get_buffer     = codec_get_buffer;
2290             ist->st->codec->release_buffer = codec_release_buffer;
2291             ist->st->codec->opaque         = &ist->buffer_pool;
2292         }
2293
2294         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2295             av_dict_set(&ist->opts, "threads", "auto", 0);
2296         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2297             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2298                     ist->file_index, ist->st->index);
2299             return AVERROR(EINVAL);
2300         }
2301         assert_codec_experimental(ist->st->codec, 0);
2302         assert_avoptions(ist->opts);
2303     }
2304
2305     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;
2306     ist->next_dts = AV_NOPTS_VALUE;
2307     init_pts_correction(&ist->pts_ctx);
2308     ist->is_start = 1;
2309
2310     return 0;
2311 }
2312
2313 static InputStream *get_input_stream(OutputStream *ost)
2314 {
2315     if (ost->source_index >= 0)
2316         return input_streams[ost->source_index];
2317
2318     if (ost->filter) {
2319         FilterGraph *fg = ost->filter->graph;
2320         int i;
2321
2322         for (i = 0; i < fg->nb_inputs; i++)
2323             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
2324                 return fg->inputs[i]->ist;
2325     }
2326
2327     return NULL;
2328 }
2329
2330 static int transcode_init(void)
2331 {
2332     int ret = 0, i, j, k;
2333     AVFormatContext *oc;
2334     AVCodecContext *codec, *icodec;
2335     OutputStream *ost;
2336     InputStream *ist;
2337     char error[1024];
2338     int want_sdp = 1;
2339
2340     /* init framerate emulation */
2341     for (i = 0; i < nb_input_files; i++) {
2342         InputFile *ifile = input_files[i];
2343         if (ifile->rate_emu)
2344             for (j = 0; j < ifile->nb_streams; j++)
2345                 input_streams[j + ifile->ist_index]->start = av_gettime();
2346     }
2347
2348     /* output stream init */
2349     for (i = 0; i < nb_output_files; i++) {
2350         oc = output_files[i]->ctx;
2351         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2352             av_dump_format(oc, i, oc->filename, 1);
2353             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2354             return AVERROR(EINVAL);
2355         }
2356     }
2357
2358     /* init complex filtergraphs */
2359     for (i = 0; i < nb_filtergraphs; i++)
2360         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2361             return ret;
2362
2363     /* for each output stream, we compute the right encoding parameters */
2364     for (i = 0; i < nb_output_streams; i++) {
2365         ost = output_streams[i];
2366         oc  = output_files[ost->file_index]->ctx;
2367         ist = get_input_stream(ost);
2368
2369         if (ost->attachment_filename)
2370             continue;
2371
2372         codec  = ost->st->codec;
2373
2374         if (ist) {
2375             icodec = ist->st->codec;
2376
2377             ost->st->disposition          = ist->st->disposition;
2378             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2379             codec->chroma_sample_location = icodec->chroma_sample_location;
2380         }
2381
2382         if (ost->stream_copy) {
2383             uint64_t extra_size;
2384
2385             av_assert0(ist && !ost->filter);
2386
2387             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2388
2389             if (extra_size > INT_MAX) {
2390                 return AVERROR(EINVAL);
2391             }
2392
2393             /* if stream_copy is selected, no need to decode or encode */
2394             codec->codec_id   = icodec->codec_id;
2395             codec->codec_type = icodec->codec_type;
2396
2397             if (!codec->codec_tag) {
2398                 if (!oc->oformat->codec_tag ||
2399                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2400                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2401                     codec->codec_tag = icodec->codec_tag;
2402             }
2403
2404             codec->bit_rate       = icodec->bit_rate;
2405             codec->rc_max_rate    = icodec->rc_max_rate;
2406             codec->rc_buffer_size = icodec->rc_buffer_size;
2407             codec->field_order    = icodec->field_order;
2408             codec->extradata      = av_mallocz(extra_size);
2409             if (!codec->extradata) {
2410                 return AVERROR(ENOMEM);
2411             }
2412             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2413             codec->extradata_size = icodec->extradata_size;
2414             if (!copy_tb) {
2415                 codec->time_base      = icodec->time_base;
2416                 codec->time_base.num *= icodec->ticks_per_frame;
2417                 av_reduce(&codec->time_base.num, &codec->time_base.den,
2418                           codec->time_base.num, codec->time_base.den, INT_MAX);
2419             } else
2420                 codec->time_base = ist->st->time_base;
2421
2422             switch (codec->codec_type) {
2423             case AVMEDIA_TYPE_AUDIO:
2424                 if (audio_volume != 256) {
2425                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2426                     exit_program(1);
2427                 }
2428                 codec->channel_layout     = icodec->channel_layout;
2429                 codec->sample_rate        = icodec->sample_rate;
2430                 codec->channels           = icodec->channels;
2431                 codec->frame_size         = icodec->frame_size;
2432                 codec->audio_service_type = icodec->audio_service_type;
2433                 codec->block_align        = icodec->block_align;
2434                 break;
2435             case AVMEDIA_TYPE_VIDEO:
2436                 codec->pix_fmt            = icodec->pix_fmt;
2437                 codec->width              = icodec->width;
2438                 codec->height             = icodec->height;
2439                 codec->has_b_frames       = icodec->has_b_frames;
2440                 if (!codec->sample_aspect_ratio.num) {
2441                     codec->sample_aspect_ratio   =
2442                     ost->st->sample_aspect_ratio =
2443                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2444                         ist->st->codec->sample_aspect_ratio.num ?
2445                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2446                 }
2447                 break;
2448             case AVMEDIA_TYPE_SUBTITLE:
2449                 codec->width  = icodec->width;
2450                 codec->height = icodec->height;
2451                 break;
2452             case AVMEDIA_TYPE_DATA:
2453             case AVMEDIA_TYPE_ATTACHMENT:
2454                 break;
2455             default:
2456                 abort();
2457             }
2458         } else {
2459             if (!ost->enc) {
2460                 /* should only happen when a default codec is not present. */
2461                 snprintf(error, sizeof(error), "Automatic encoder selection "
2462                          "failed for output stream #%d:%d. Default encoder for "
2463                          "format %s is probably disabled. Please choose an "
2464                          "encoder manually.\n", ost->file_index, ost->index,
2465                          oc->oformat->name);
2466                 ret = AVERROR(EINVAL);
2467                 goto dump_format;
2468             }
2469
2470             if (ist)
2471                 ist->decoding_needed = 1;
2472             ost->encoding_needed = 1;
2473
2474             /*
2475              * We want CFR output if and only if one of those is true:
2476              * 1) user specified output framerate with -r
2477              * 2) user specified -vsync cfr
2478              * 3) output format is CFR and the user didn't force vsync to
2479              *    something else than CFR
2480              *
2481              * in such a case, set ost->frame_rate
2482              */
2483             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
2484                 !ost->frame_rate.num && ist &&
2485                 (video_sync_method ==  VSYNC_CFR ||
2486                  (video_sync_method ==  VSYNC_AUTO &&
2487                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
2488                 ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
2489                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2490                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2491                     ost->frame_rate = ost->enc->supported_framerates[idx];
2492                 }
2493             }
2494
2495             if (!ost->filter &&
2496                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2497                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2498                     FilterGraph *fg;
2499                     fg = init_simple_filtergraph(ist, ost);
2500                     if (configure_filtergraph(fg)) {
2501                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2502                         exit(1);
2503                     }
2504             }
2505
2506             switch (codec->codec_type) {
2507             case AVMEDIA_TYPE_AUDIO:
2508                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2509                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2510                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2511                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
2512                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2513                 break;
2514             case AVMEDIA_TYPE_VIDEO:
2515                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
2516
2517                 codec->width  = ost->filter->filter->inputs[0]->w;
2518                 codec->height = ost->filter->filter->inputs[0]->h;
2519                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2520                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
2521                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
2522                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2523                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2524
2525                 if (codec->width   != icodec->width  ||
2526                     codec->height  != icodec->height ||
2527                     codec->pix_fmt != icodec->pix_fmt) {
2528                     codec->bits_per_raw_sample = 0;
2529                 }
2530
2531                 break;
2532             case AVMEDIA_TYPE_SUBTITLE:
2533                 codec->time_base = (AVRational){1, 1000};
2534                 break;
2535             default:
2536                 abort();
2537                 break;
2538             }
2539             /* two pass mode */
2540             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
2541                 char logfilename[1024];
2542                 FILE *f;
2543
2544                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2545                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
2546                          i);
2547                 if (!strcmp(ost->enc->name, "libx264")) {
2548                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2549                 } else {
2550                     if (codec->flags & CODEC_FLAG_PASS1) {
2551                         f = fopen(logfilename, "wb");
2552                         if (!f) {
2553                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2554                                    logfilename, strerror(errno));
2555                             exit_program(1);
2556                         }
2557                         ost->logfile = f;
2558                     } else {
2559                         char  *logbuffer;
2560                         size_t logbuffer_size;
2561                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2562                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2563                                    logfilename);
2564                             exit_program(1);
2565                         }
2566                         codec->stats_in = logbuffer;
2567                     }
2568                 }
2569             }
2570         }
2571     }
2572
2573     /* open each encoder */
2574     for (i = 0; i < nb_output_streams; i++) {
2575         ost = output_streams[i];
2576         if (ost->encoding_needed) {
2577             AVCodec      *codec = ost->enc;
2578             AVCodecContext *dec = NULL;
2579
2580             if ((ist = get_input_stream(ost)))
2581                 dec = ist->st->codec;
2582             if (dec && dec->subtitle_header) {
2583                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
2584                 if (!ost->st->codec->subtitle_header) {
2585                     ret = AVERROR(ENOMEM);
2586                     goto dump_format;
2587                 }
2588                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2589                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2590             }
2591             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2592                 av_dict_set(&ost->opts, "threads", "auto", 0);
2593             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
2594                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2595                         ost->file_index, ost->index);
2596                 ret = AVERROR(EINVAL);
2597                 goto dump_format;
2598             }
2599             assert_codec_experimental(ost->st->codec, 1);
2600             assert_avoptions(ost->opts);
2601             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2602                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2603                                              "It takes bits/s as argument, not kbits/s\n");
2604             extra_size += ost->st->codec->extradata_size;
2605
2606             if (ost->st->codec->me_threshold)
2607                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
2608         }
2609     }
2610
2611     /* init input streams */
2612     for (i = 0; i < nb_input_streams; i++)
2613         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
2614             goto dump_format;
2615
2616     /* discard unused programs */
2617     for (i = 0; i < nb_input_files; i++) {
2618         InputFile *ifile = input_files[i];
2619         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2620             AVProgram *p = ifile->ctx->programs[j];
2621             int discard  = AVDISCARD_ALL;
2622
2623             for (k = 0; k < p->nb_stream_indexes; k++)
2624                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
2625                     discard = AVDISCARD_DEFAULT;
2626                     break;
2627                 }
2628             p->discard = discard;
2629         }
2630     }
2631
2632     /* open files and write file headers */
2633     for (i = 0; i < nb_output_files; i++) {
2634         oc = output_files[i]->ctx;
2635         oc->interrupt_callback = int_cb;
2636         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
2637             char errbuf[128];
2638             const char *errbuf_ptr = errbuf;
2639             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
2640                 errbuf_ptr = strerror(AVUNERROR(ret));
2641             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
2642             ret = AVERROR(EINVAL);
2643             goto dump_format;
2644         }
2645         assert_avoptions(output_files[i]->opts);
2646         if (strcmp(oc->oformat->name, "rtp")) {
2647             want_sdp = 0;
2648         }
2649     }
2650
2651  dump_format:
2652     /* dump the file output parameters - cannot be done before in case
2653        of stream copy */
2654     for (i = 0; i < nb_output_files; i++) {
2655         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
2656     }
2657
2658     /* dump the stream mapping */
2659     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2660     for (i = 0; i < nb_input_streams; i++) {
2661         ist = input_streams[i];
2662
2663         for (j = 0; j < ist->nb_filters; j++) {
2664             if (ist->filters[j]->graph->graph_desc) {
2665                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
2666                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
2667                        ist->filters[j]->name);
2668                 if (nb_filtergraphs > 1)
2669                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
2670                 av_log(NULL, AV_LOG_INFO, "\n");
2671             }
2672         }
2673     }
2674
2675     for (i = 0; i < nb_output_streams; i++) {
2676         ost = output_streams[i];
2677
2678         if (ost->attachment_filename) {
2679             /* an attached file */
2680             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2681                    ost->attachment_filename, ost->file_index, ost->index);
2682             continue;
2683         }
2684
2685         if (ost->filter && ost->filter->graph->graph_desc) {
2686             /* output from a complex graph */
2687             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
2688             if (nb_filtergraphs > 1)
2689                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
2690
2691             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
2692                    ost->index, ost->enc ? ost->enc->name : "?");
2693             continue;
2694         }
2695
2696         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2697                input_streams[ost->source_index]->file_index,
2698                input_streams[ost->source_index]->st->index,
2699                ost->file_index,
2700                ost->index);
2701         if (ost->sync_ist != input_streams[ost->source_index])
2702             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2703                    ost->sync_ist->file_index,
2704                    ost->sync_ist->st->index);
2705         if (ost->stream_copy)
2706             av_log(NULL, AV_LOG_INFO, " (copy)");
2707         else
2708             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
2709                    input_streams[ost->source_index]->dec->name : "?",
2710                    ost->enc ? ost->enc->name : "?");
2711         av_log(NULL, AV_LOG_INFO, "\n");
2712     }
2713
2714     if (ret) {
2715         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2716         return ret;
2717     }
2718
2719     if (want_sdp) {
2720         print_sdp();
2721     }
2722
2723     return 0;
2724 }
2725
2726 /**
2727  * @return 1 if there are still streams where more output is wanted,
2728  *         0 otherwise
2729  */
2730 static int need_output(void)
2731 {
2732     int i;
2733
2734     for (i = 0; i < nb_output_streams; i++) {
2735         OutputStream *ost    = output_streams[i];
2736         OutputFile *of       = output_files[ost->file_index];
2737         AVFormatContext *os  = output_files[ost->file_index]->ctx;
2738
2739         if (ost->is_past_recording_time ||
2740             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2741             continue;
2742         if (ost->frame_number >= ost->max_frames) {
2743             int j;
2744             for (j = 0; j < of->ctx->nb_streams; j++)
2745                 output_streams[of->ost_index + j]->is_past_recording_time = 1;
2746             continue;
2747         }
2748
2749         return 1;
2750     }
2751
2752     return 0;
2753 }
2754
2755 static int select_input_file(uint8_t *no_packet)
2756 {
2757     int64_t ipts_min = INT64_MAX;
2758     int i, file_index = -1;
2759
2760     for (i = 0; i < nb_input_streams; i++) {
2761         InputStream *ist = input_streams[i];
2762         int64_t ipts     = ist->last_dts;
2763
2764         if (ist->discard || no_packet[ist->file_index])
2765             continue;
2766         if (!input_files[ist->file_index]->eof_reached) {
2767             if (ipts < ipts_min) {
2768                 ipts_min = ipts;
2769                 file_index = ist->file_index;
2770             }
2771         }
2772     }
2773
2774     return file_index;
2775 }
2776
2777 #if HAVE_PTHREADS
2778 static void *input_thread(void *arg)
2779 {
2780     InputFile *f = arg;
2781     int ret = 0;
2782
2783     while (!transcoding_finished && ret >= 0) {
2784         AVPacket pkt;
2785         ret = av_read_frame(f->ctx, &pkt);
2786
2787         if (ret == AVERROR(EAGAIN)) {
2788             av_usleep(10000);
2789             ret = 0;
2790             continue;
2791         } else if (ret < 0)
2792             break;
2793
2794         pthread_mutex_lock(&f->fifo_lock);
2795         while (!av_fifo_space(f->fifo))
2796             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2797
2798         av_dup_packet(&pkt);
2799         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2800
2801         pthread_mutex_unlock(&f->fifo_lock);
2802     }
2803
2804     f->finished = 1;
2805     return NULL;
2806 }
2807
2808 static void free_input_threads(void)
2809 {
2810     int i;
2811
2812     if (nb_input_files == 1)
2813         return;
2814
2815     transcoding_finished = 1;
2816
2817     for (i = 0; i < nb_input_files; i++) {
2818         InputFile *f = input_files[i];
2819         AVPacket pkt;
2820
2821         if (!f->fifo || f->joined)
2822             continue;
2823
2824         pthread_mutex_lock(&f->fifo_lock);
2825         while (av_fifo_size(f->fifo)) {
2826             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2827             av_free_packet(&pkt);
2828         }
2829         pthread_cond_signal(&f->fifo_cond);
2830         pthread_mutex_unlock(&f->fifo_lock);
2831
2832         pthread_join(f->thread, NULL);
2833         f->joined = 1;
2834
2835         while (av_fifo_size(f->fifo)) {
2836             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2837             av_free_packet(&pkt);
2838         }
2839         av_fifo_free(f->fifo);
2840     }
2841 }
2842
2843 static int init_input_threads(void)
2844 {
2845     int i, ret;
2846
2847     if (nb_input_files == 1)
2848         return 0;
2849
2850     for (i = 0; i < nb_input_files; i++) {
2851         InputFile *f = input_files[i];
2852
2853         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2854             return AVERROR(ENOMEM);
2855
2856         pthread_mutex_init(&f->fifo_lock, NULL);
2857         pthread_cond_init (&f->fifo_cond, NULL);
2858
2859         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2860             return AVERROR(ret);
2861     }
2862     return 0;
2863 }
2864
2865 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2866 {
2867     int ret = 0;
2868
2869     pthread_mutex_lock(&f->fifo_lock);
2870
2871     if (av_fifo_size(f->fifo)) {
2872         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2873         pthread_cond_signal(&f->fifo_cond);
2874     } else {
2875         if (f->finished)
2876             ret = AVERROR_EOF;
2877         else
2878             ret = AVERROR(EAGAIN);
2879     }
2880
2881     pthread_mutex_unlock(&f->fifo_lock);
2882
2883     return ret;
2884 }
2885 #endif
2886
2887 static int get_input_packet(InputFile *f, AVPacket *pkt)
2888 {
2889 #if HAVE_PTHREADS
2890     if (nb_input_files > 1)
2891         return get_input_packet_mt(f, pkt);
2892 #endif
2893     return av_read_frame(f->ctx, pkt);
2894 }
2895
2896 /*
2897  * The following code is the main loop of the file converter
2898  */
2899 static int transcode(void)
2900 {
2901     int ret, i;
2902     AVFormatContext *is, *os;
2903     OutputStream *ost;
2904     InputStream *ist;
2905     uint8_t *no_packet;
2906     int no_packet_count = 0;
2907     int64_t timer_start;
2908
2909     if (!(no_packet = av_mallocz(nb_input_files)))
2910         exit_program(1);
2911
2912     ret = transcode_init();
2913     if (ret < 0)
2914         goto fail;
2915
2916     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2917     term_init();
2918
2919     timer_start = av_gettime();
2920
2921 #if HAVE_PTHREADS
2922     if ((ret = init_input_threads()) < 0)
2923         goto fail;
2924 #endif
2925
2926     for (; received_sigterm == 0;) {
2927         int file_index, ist_index;
2928         AVPacket pkt;
2929
2930         /* check if there's any stream where output is still needed */
2931         if (!need_output()) {
2932             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2933             break;
2934         }
2935
2936         /* select the stream that we must read now */
2937         file_index = select_input_file(no_packet);
2938         /* if none, if is finished */
2939         if (file_index < 0) {
2940             if (no_packet_count) {
2941                 no_packet_count = 0;
2942                 memset(no_packet, 0, nb_input_files);
2943                 av_usleep(10000);
2944                 continue;
2945             }
2946             av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
2947             break;
2948         }
2949
2950         is  = input_files[file_index]->ctx;
2951         ret = get_input_packet(input_files[file_index], &pkt);
2952
2953         if (ret == AVERROR(EAGAIN)) {
2954             no_packet[file_index] = 1;
2955             no_packet_count++;
2956             continue;
2957         }
2958         if (ret < 0) {
2959             input_files[file_index]->eof_reached = 1;
2960
2961             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
2962                 ist = input_streams[input_files[file_index]->ist_index + i];
2963                 if (ist->decoding_needed)
2964                     output_packet(ist, NULL);
2965             }
2966
2967             if (opt_shortest)
2968                 break;
2969             else
2970                 continue;
2971         }
2972
2973         no_packet_count = 0;
2974         memset(no_packet, 0, nb_input_files);
2975
2976         if (do_pkt_dump) {
2977             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2978                              is->streams[pkt.stream_index]);
2979         }
2980         /* the following test is needed in case new streams appear
2981            dynamically in stream : we ignore them */
2982         if (pkt.stream_index >= input_files[file_index]->nb_streams)
2983             goto discard_packet;
2984         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
2985         ist = input_streams[ist_index];
2986         if (ist->discard)
2987             goto discard_packet;
2988
2989         if (pkt.dts != AV_NOPTS_VALUE)
2990             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2991         if (pkt.pts != AV_NOPTS_VALUE)
2992             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2993
2994         if (pkt.pts != AV_NOPTS_VALUE)
2995             pkt.pts *= ist->ts_scale;
2996         if (pkt.dts != AV_NOPTS_VALUE)
2997             pkt.dts *= ist->ts_scale;
2998
2999         //fprintf(stderr, "next:%"PRId64" dts:%"PRId64" off:%"PRId64" %d\n",
3000         //        ist->next_dts,
3001         //        pkt.dts, input_files[ist->file_index].ts_offset,
3002         //        ist->st->codec->codec_type);
3003         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE
3004             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
3005             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3006             int64_t delta   = pkt_dts - ist->next_dts;
3007             if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
3008                 input_files[ist->file_index]->ts_offset -= delta;
3009                 av_log(NULL, AV_LOG_DEBUG,
3010                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3011                        delta, input_files[ist->file_index]->ts_offset);
3012                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3013                 if (pkt.pts != AV_NOPTS_VALUE)
3014                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3015             }
3016         }
3017
3018         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
3019         if (output_packet(ist, &pkt) < 0 || poll_filters() < 0) {
3020             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
3021                    ist->file_index, ist->st->index);
3022             if (exit_on_error)
3023                 exit_program(1);
3024             av_free_packet(&pkt);
3025             continue;
3026         }
3027
3028     discard_packet:
3029         av_free_packet(&pkt);
3030
3031         /* dump report by using the output first video and audio streams */
3032         print_report(0, timer_start);
3033     }
3034 #if HAVE_PTHREADS
3035     free_input_threads();
3036 #endif
3037
3038     /* at the end of stream, we must flush the decoder buffers */
3039     for (i = 0; i < nb_input_streams; i++) {
3040         ist = input_streams[i];
3041         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3042             output_packet(ist, NULL);
3043         }
3044     }
3045     poll_filters();
3046     flush_encoders();
3047
3048     term_exit();
3049
3050     /* write the trailer if needed and close file */
3051     for (i = 0; i < nb_output_files; i++) {
3052         os = output_files[i]->ctx;
3053         av_write_trailer(os);
3054     }
3055
3056     /* dump report by using the first video and audio streams */
3057     print_report(1, timer_start);
3058
3059     /* close each encoder */
3060     for (i = 0; i < nb_output_streams; i++) {
3061         ost = output_streams[i];
3062         if (ost->encoding_needed) {
3063             av_freep(&ost->st->codec->stats_in);
3064             avcodec_close(ost->st->codec);
3065         }
3066     }
3067
3068     /* close each decoder */
3069     for (i = 0; i < nb_input_streams; i++) {
3070         ist = input_streams[i];
3071         if (ist->decoding_needed) {
3072             avcodec_close(ist->st->codec);
3073         }
3074     }
3075
3076     /* finished ! */
3077     ret = 0;
3078
3079  fail:
3080     av_freep(&no_packet);
3081 #if HAVE_PTHREADS
3082     free_input_threads();
3083 #endif
3084
3085     if (output_streams) {
3086         for (i = 0; i < nb_output_streams; i++) {
3087             ost = output_streams[i];
3088             if (ost) {
3089                 if (ost->stream_copy)
3090                     av_freep(&ost->st->codec->extradata);
3091                 if (ost->logfile) {
3092                     fclose(ost->logfile);
3093                     ost->logfile = NULL;
3094                 }
3095                 av_freep(&ost->st->codec->subtitle_header);
3096                 av_free(ost->forced_kf_pts);
3097                 av_dict_free(&ost->opts);
3098             }
3099         }
3100     }
3101     return ret;
3102 }
3103
3104 static double parse_frame_aspect_ratio(const char *arg)
3105 {
3106     int x = 0, y = 0;
3107     double ar = 0;
3108     const char *p;
3109     char *end;
3110
3111     p = strchr(arg, ':');
3112     if (p) {
3113         x = strtol(arg, &end, 10);
3114         if (end == p)
3115             y = strtol(end + 1, &end, 10);
3116         if (x > 0 && y > 0)
3117             ar = (double)x / (double)y;
3118     } else
3119         ar = strtod(arg, NULL);
3120
3121     if (!ar) {
3122         av_log(NULL, AV_LOG_FATAL, "Incorrect aspect ratio specification.\n");
3123         exit_program(1);
3124     }
3125     return ar;
3126 }
3127
3128 static int opt_audio_codec(OptionsContext *o, const char *opt, const char *arg)
3129 {
3130     return parse_option(o, "codec:a", arg, options);
3131 }
3132
3133 static int opt_video_codec(OptionsContext *o, const char *opt, const char *arg)
3134 {
3135     return parse_option(o, "codec:v", arg, options);
3136 }
3137
3138 static int opt_subtitle_codec(OptionsContext *o, const char *opt, const char *arg)
3139 {
3140     return parse_option(o, "codec:s", arg, options);
3141 }
3142
3143 static int opt_data_codec(OptionsContext *o, const char *opt, const char *arg)
3144 {
3145     return parse_option(o, "codec:d", arg, options);
3146 }
3147
3148 static int opt_map(OptionsContext *o, const char *opt, const char *arg)
3149 {
3150     StreamMap *m = NULL;
3151     int i, negative = 0, file_idx;
3152     int sync_file_idx = -1, sync_stream_idx;
3153     char *p, *sync;
3154     char *map;
3155
3156     if (*arg == '-') {
3157         negative = 1;
3158         arg++;
3159     }
3160     map = av_strdup(arg);
3161
3162     /* parse sync stream first, just pick first matching stream */
3163     if (sync = strchr(map, ',')) {
3164         *sync = 0;
3165         sync_file_idx = strtol(sync + 1, &sync, 0);
3166         if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
3167             av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
3168             exit_program(1);
3169         }
3170         if (*sync)
3171             sync++;
3172         for (i = 0; i < input_files[sync_file_idx]->nb_streams; i++)
3173             if (check_stream_specifier(input_files[sync_file_idx]->ctx,
3174                                        input_files[sync_file_idx]->ctx->streams[i], sync) == 1) {
3175                 sync_stream_idx = i;
3176                 break;
3177             }
3178         if (i == input_files[sync_file_idx]->nb_streams) {
3179             av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
3180                                        "match any streams.\n", arg);
3181             exit_program(1);
3182         }
3183     }
3184
3185
3186     if (map[0] == '[') {
3187         /* this mapping refers to lavfi output */
3188         const char *c = map + 1;
3189         o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3190                                     &o->nb_stream_maps, o->nb_stream_maps + 1);
3191         m = &o->stream_maps[o->nb_stream_maps - 1];
3192         m->linklabel = av_get_token(&c, "]");
3193         if (!m->linklabel) {
3194             av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
3195             exit_program(1);
3196         }
3197     } else {
3198         file_idx = strtol(map, &p, 0);
3199         if (file_idx >= nb_input_files || file_idx < 0) {
3200             av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
3201             exit_program(1);
3202         }
3203         if (negative)
3204             /* disable some already defined maps */
3205             for (i = 0; i < o->nb_stream_maps; i++) {
3206                 m = &o->stream_maps[i];
3207                 if (file_idx == m->file_index &&
3208                     check_stream_specifier(input_files[m->file_index]->ctx,
3209                                            input_files[m->file_index]->ctx->streams[m->stream_index],
3210                                            *p == ':' ? p + 1 : p) > 0)
3211                     m->disabled = 1;
3212             }
3213         else
3214             for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
3215                 if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
3216                             *p == ':' ? p + 1 : p) <= 0)
3217                     continue;
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
3222                 m->file_index   = file_idx;
3223                 m->stream_index = i;
3224
3225                 if (sync_file_idx >= 0) {
3226                     m->sync_file_index   = sync_file_idx;
3227                     m->sync_stream_index = sync_stream_idx;
3228                 } else {
3229                     m->sync_file_index   = file_idx;
3230                     m->sync_stream_index = i;
3231                 }
3232             }
3233     }
3234
3235     if (!m) {
3236         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
3237         exit_program(1);
3238     }
3239
3240     av_freep(&map);
3241     return 0;
3242 }
3243
3244 static int opt_attach(OptionsContext *o, const char *opt, const char *arg)
3245 {
3246     o->attachments = grow_array(o->attachments, sizeof(*o->attachments),
3247                                 &o->nb_attachments, o->nb_attachments + 1);
3248     o->attachments[o->nb_attachments - 1] = arg;
3249     return 0;
3250 }
3251
3252 /**
3253  * Parse a metadata specifier in arg.
3254  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
3255  * @param index for type c/p, chapter/program index is written here
3256  * @param stream_spec for type s, the stream specifier is written here
3257  */
3258 static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
3259 {
3260     if (*arg) {
3261         *type = *arg;
3262         switch (*arg) {
3263         case 'g':
3264             break;
3265         case 's':
3266             if (*(++arg) && *arg != ':') {
3267                 av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
3268                 exit_program(1);
3269             }
3270             *stream_spec = *arg == ':' ? arg + 1 : "";
3271             break;
3272         case 'c':
3273         case 'p':
3274             if (*(++arg) == ':')
3275                 *index = strtol(++arg, NULL, 0);
3276             break;
3277         default:
3278             av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
3279             exit_program(1);
3280         }
3281     } else
3282         *type = 'g';
3283 }
3284
3285 static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
3286 {
3287     AVDictionary **meta_in = NULL;
3288     AVDictionary **meta_out;
3289     int i, ret = 0;
3290     char type_in, type_out;
3291     const char *istream_spec = NULL, *ostream_spec = NULL;
3292     int idx_in = 0, idx_out = 0;
3293
3294     parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
3295     parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
3296
3297     if (type_in == 'g' || type_out == 'g')
3298         o->metadata_global_manual = 1;
3299     if (type_in == 's' || type_out == 's')
3300         o->metadata_streams_manual = 1;
3301     if (type_in == 'c' || type_out == 'c')
3302         o->metadata_chapters_manual = 1;
3303
3304 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
3305     if ((index) < 0 || (index) >= (nb_elems)) {\
3306         av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
3307                 (desc), (index));\
3308         exit_program(1);\
3309     }
3310
3311 #define SET_DICT(type, meta, context, index)\
3312         switch (type) {\
3313         case 'g':\
3314             meta = &context->metadata;\
3315             break;\
3316         case 'c':\
3317             METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
3318             meta = &context->chapters[index]->metadata;\
3319             break;\
3320         case 'p':\
3321             METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
3322             meta = &context->programs[index]->metadata;\
3323             break;\
3324         }\
3325
3326     SET_DICT(type_in, meta_in, ic, idx_in);
3327     SET_DICT(type_out, meta_out, oc, idx_out);
3328
3329     /* for input streams choose first matching stream */
3330     if (type_in == 's') {
3331         for (i = 0; i < ic->nb_streams; i++) {
3332             if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
3333                 meta_in = &ic->streams[i]->metadata;
3334                 break;
3335             } else if (ret < 0)
3336                 exit_program(1);
3337         }
3338         if (!meta_in) {
3339             av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
3340             exit_program(1);
3341         }
3342     }
3343
3344     if (type_out == 's') {
3345         for (i = 0; i < oc->nb_streams; i++) {
3346             if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
3347                 meta_out = &oc->streams[i]->metadata;
3348                 av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3349             } else if (ret < 0)
3350                 exit_program(1);
3351         }
3352     } else
3353         av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3354
3355     return 0;
3356 }
3357
3358 static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
3359 {
3360     const char *codec_string = encoder ? "encoder" : "decoder";
3361     AVCodec *codec;
3362
3363     codec = encoder ?
3364         avcodec_find_encoder_by_name(name) :
3365         avcodec_find_decoder_by_name(name);
3366     if (!codec) {
3367         av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
3368         exit_program(1);
3369     }
3370     if (codec->type != type) {
3371         av_log(NULL, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
3372         exit_program(1);
3373     }
3374     return codec;
3375 }
3376
3377 static AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVStream *st)
3378 {
3379     char *codec_name = NULL;
3380
3381     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
3382     if (codec_name) {
3383         AVCodec *codec = find_codec_or_die(codec_name, st->codec->codec_type, 0);
3384         st->codec->codec_id = codec->id;
3385         return codec;
3386     } else
3387         return avcodec_find_decoder(st->codec->codec_id);
3388 }
3389
3390 /**
3391  * Add all the streams from the given input file to the global
3392  * list of input streams.
3393  */
3394 static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
3395 {
3396     int i;
3397
3398     for (i = 0; i < ic->nb_streams; i++) {
3399         AVStream *st = ic->streams[i];
3400         AVCodecContext *dec = st->codec;
3401         InputStream *ist = av_mallocz(sizeof(*ist));
3402         char *framerate = NULL;
3403
3404         if (!ist)
3405             exit_program(1);
3406
3407         input_streams = grow_array(input_streams, sizeof(*input_streams), &nb_input_streams, nb_input_streams + 1);
3408         input_streams[nb_input_streams - 1] = ist;
3409
3410         ist->st = st;
3411         ist->file_index = nb_input_files;
3412         ist->discard = 1;
3413         st->discard  = AVDISCARD_ALL;
3414         ist->opts = filter_codec_opts(codec_opts, ist->st->codec->codec_id, ic, st);
3415
3416         ist->ts_scale = 1.0;
3417         MATCH_PER_STREAM_OPT(ts_scale, dbl, ist->ts_scale, ic, st);
3418
3419         ist->dec = choose_decoder(o, ic, st);
3420
3421         switch (dec->codec_type) {
3422         case AVMEDIA_TYPE_VIDEO:
3423             ist->resample_height  = dec->height;
3424             ist->resample_width   = dec->width;
3425             ist->resample_pix_fmt = dec->pix_fmt;
3426
3427             MATCH_PER_STREAM_OPT(frame_rates, str, framerate, ic, st);
3428             if (framerate && av_parse_video_rate(&ist->framerate,
3429                                                  framerate) < 0) {
3430                 av_log(NULL, AV_LOG_ERROR, "Error parsing framerate %s.\n",
3431                        framerate);
3432                 exit_program(1);
3433             }
3434
3435             break;
3436         case AVMEDIA_TYPE_AUDIO:
3437             guess_input_channel_layout(ist);
3438
3439             ist->resample_sample_fmt     = dec->sample_fmt;
3440             ist->resample_sample_rate    = dec->sample_rate;
3441             ist->resample_channels       = dec->channels;
3442             ist->resample_channel_layout = dec->channel_layout;
3443
3444             break;
3445         case AVMEDIA_TYPE_DATA:
3446         case AVMEDIA_TYPE_SUBTITLE:
3447         case AVMEDIA_TYPE_ATTACHMENT:
3448         case AVMEDIA_TYPE_UNKNOWN:
3449             break;
3450         default:
3451             abort();
3452         }
3453     }
3454 }
3455
3456 static void assert_file_overwrite(const char *filename)
3457 {
3458     if (!file_overwrite &&
3459         (strchr(filename, ':') == NULL || filename[1] == ':' ||
3460          av_strstart(filename, "file:", NULL))) {
3461         if (avio_check(filename, 0) == 0) {
3462             if (!using_stdin) {
3463                 fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
3464                 fflush(stderr);
3465                 if (!read_yesno()) {
3466                     fprintf(stderr, "Not overwriting - exiting\n");
3467                     exit_program(1);
3468                 }
3469             }
3470             else {
3471                 fprintf(stderr,"File '%s' already exists. Exiting.\n", filename);
3472                 exit_program(1);
3473             }
3474         }
3475     }
3476 }
3477
3478 static void dump_attachment(AVStream *st, const char *filename)
3479 {
3480     int ret;
3481     AVIOContext *out = NULL;
3482     AVDictionaryEntry *e;
3483
3484     if (!st->codec->extradata_size) {
3485         av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
3486                nb_input_files - 1, st->index);
3487         return;
3488     }
3489     if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
3490         filename = e->value;
3491     if (!*filename) {
3492         av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
3493                "in stream #%d:%d.\n", nb_input_files - 1, st->index);
3494         exit_program(1);
3495     }
3496
3497     assert_file_overwrite(filename);
3498
3499     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
3500         av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
3501                filename);
3502         exit_program(1);
3503     }
3504
3505     avio_write(out, st->codec->extradata, st->codec->extradata_size);
3506     avio_flush(out);
3507     avio_close(out);
3508 }
3509
3510 static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
3511 {
3512     AVFormatContext *ic;
3513     AVInputFormat *file_iformat = NULL;
3514     int err, i, ret;
3515     int64_t timestamp;
3516     uint8_t buf[128];
3517     AVDictionary **opts;
3518     int orig_nb_streams;                     // number of streams before avformat_find_stream_info
3519
3520     if (o->format) {
3521         if (!(file_iformat = av_find_input_format(o->format))) {
3522             av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
3523             exit_program(1);
3524         }
3525     }
3526
3527     if (!strcmp(filename, "-"))
3528         filename = "pipe:";
3529
3530     using_stdin |= !strncmp(filename, "pipe:", 5) ||
3531                     !strcmp(filename, "/dev/stdin");
3532
3533     /* get default parameters from command line */
3534     ic = avformat_alloc_context();
3535     if (!ic) {
3536         print_error(filename, AVERROR(ENOMEM));
3537         exit_program(1);
3538     }
3539     if (o->nb_audio_sample_rate) {
3540         snprintf(buf, sizeof(buf), "%d", o->audio_sample_rate[o->nb_audio_sample_rate - 1].u.i);
3541         av_dict_set(&format_opts, "sample_rate", buf, 0);
3542     }
3543     if (o->nb_audio_channels) {
3544         /* because we set audio_channels based on both the "ac" and
3545          * "channel_layout" options, we need to check that the specified
3546          * demuxer actually has the "channels" option before setting it */
3547         if (file_iformat && file_iformat->priv_class &&
3548             av_opt_find(&file_iformat->priv_class, "channels", NULL, 0,
3549                         AV_OPT_SEARCH_FAKE_OBJ)) {
3550             snprintf(buf, sizeof(buf), "%d",
3551                      o->audio_channels[o->nb_audio_channels - 1].u.i);
3552             av_dict_set(&format_opts, "channels", buf, 0);
3553         }
3554     }
3555     if (o->nb_frame_rates) {
3556         /* set the format-level framerate option;
3557          * this is important for video grabbers, e.g. x11 */
3558         if (file_iformat && file_iformat->priv_class &&
3559             av_opt_find(&file_iformat->priv_class, "framerate", NULL, 0,
3560                         AV_OPT_SEARCH_FAKE_OBJ)) {
3561             av_dict_set(&format_opts, "framerate",
3562                         o->frame_rates[o->nb_frame_rates - 1].u.str, 0);
3563         }
3564     }
3565     if (o->nb_frame_sizes) {
3566         av_dict_set(&format_opts, "video_size", o->frame_sizes[o->nb_frame_sizes - 1].u.str, 0);
3567     }
3568     if (o->nb_frame_pix_fmts)
3569         av_dict_set(&format_opts, "pixel_format", o->frame_pix_fmts[o->nb_frame_pix_fmts - 1].u.str, 0);
3570
3571     ic->flags |= AVFMT_FLAG_NONBLOCK;
3572     ic->interrupt_callback = int_cb;
3573
3574     /* open the input file with generic libav function */
3575     err = avformat_open_input(&ic, filename, file_iformat, &format_opts);
3576     if (err < 0) {
3577         print_error(filename, err);
3578         exit_program(1);
3579     }
3580     assert_avoptions(format_opts);
3581
3582     /* apply forced codec ids */
3583     for (i = 0; i < ic->nb_streams; i++)
3584         choose_decoder(o, ic, ic->streams[i]);
3585
3586     /* Set AVCodecContext options for avformat_find_stream_info */
3587     opts = setup_find_stream_info_opts(ic, codec_opts);
3588     orig_nb_streams = ic->nb_streams;
3589
3590     /* If not enough info to get the stream parameters, we decode the
3591        first frames to get it. (used in mpeg case for example) */
3592     ret = avformat_find_stream_info(ic, opts);
3593     if (ret < 0) {
3594         av_log(NULL, AV_LOG_FATAL, "%s: could not find codec parameters\n", filename);
3595         avformat_close_input(&ic);
3596         exit_program(1);
3597     }
3598
3599     timestamp = o->start_time;
3600     /* add the stream start time */
3601     if (ic->start_time != AV_NOPTS_VALUE)
3602         timestamp += ic->start_time;
3603
3604     /* if seeking requested, we execute it */
3605     if (o->start_time != 0) {
3606         ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
3607         if (ret < 0) {
3608             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
3609                    filename, (double)timestamp / AV_TIME_BASE);
3610         }
3611     }
3612
3613     /* update the current parameters so that they match the one of the input stream */
3614     add_input_streams(o, ic);
3615
3616     /* dump the file content */
3617     av_dump_format(ic, nb_input_files, filename, 0);
3618
3619     input_files = grow_array(input_files, sizeof(*input_files), &nb_input_files, nb_input_files + 1);
3620     if (!(input_files[nb_input_files - 1] = av_mallocz(sizeof(*input_files[0]))))
3621         exit_program(1);
3622
3623     input_files[nb_input_files - 1]->ctx        = ic;
3624     input_files[nb_input_files - 1]->ist_index  = nb_input_streams - ic->nb_streams;
3625     input_files[nb_input_files - 1]->ts_offset  = o->input_ts_offset - (copy_ts ? 0 : timestamp);
3626     input_files[nb_input_files - 1]->nb_streams = ic->nb_streams;
3627     input_files[nb_input_files - 1]->rate_emu   = o->rate_emu;
3628
3629     for (i = 0; i < o->nb_dump_attachment; i++) {
3630         int j;
3631
3632         for (j = 0; j < ic->nb_streams; j++) {
3633             AVStream *st = ic->streams[j];
3634
3635             if (check_stream_specifier(ic, st, o->dump_attachment[i].specifier) == 1)
3636                 dump_attachment(st, o->dump_attachment[i].u.str);
3637         }
3638     }
3639
3640     for (i = 0; i < orig_nb_streams; i++)
3641         av_dict_free(&opts[i]);
3642     av_freep(&opts);
3643
3644     reset_options(o);
3645     return 0;
3646 }
3647
3648 static void parse_forced_key_frames(char *kf, OutputStream *ost,
3649                                     AVCodecContext *avctx)
3650 {
3651     char *p;
3652     int n = 1, i;
3653     int64_t t;
3654
3655     for (p = kf; *p; p++)
3656         if (*p == ',')
3657             n++;
3658     ost->forced_kf_count = n;
3659     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
3660     if (!ost->forced_kf_pts) {
3661         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
3662         exit_program(1);
3663     }
3664     for (i = 0; i < n; i++) {
3665         p = i ? strchr(p, ',') + 1 : kf;
3666         t = parse_time_or_die("force_key_frames", p, 1);
3667         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
3668     }
3669 }
3670
3671 static uint8_t *get_line(AVIOContext *s)
3672 {
3673     AVIOContext *line;
3674     uint8_t *buf;
3675     char c;
3676
3677     if (avio_open_dyn_buf(&line) < 0) {
3678         av_log(NULL, AV_LOG_FATAL, "Could not alloc buffer for reading preset.\n");
3679         exit_program(1);
3680     }
3681
3682     while ((c = avio_r8(s)) && c != '\n')
3683         avio_w8(line, c);
3684     avio_w8(line, 0);
3685     avio_close_dyn_buf(line, &buf);
3686
3687     return buf;
3688 }
3689
3690 static int get_preset_file_2(const char *preset_name, const char *codec_name, AVIOContext **s)
3691 {
3692     int i, ret = 1;
3693     char filename[1000];
3694     const char *base[3] = { getenv("AVCONV_DATADIR"),
3695                             getenv("HOME"),
3696                             AVCONV_DATADIR,
3697                             };
3698
3699     for (i = 0; i < FF_ARRAY_ELEMS(base) && ret; i++) {
3700         if (!base[i])
3701             continue;
3702         if (codec_name) {
3703             snprintf(filename, sizeof(filename), "%s%s/%s-%s.avpreset", base[i],
3704                      i != 1 ? "" : "/.avconv", codec_name, preset_name);
3705             ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
3706         }
3707         if (ret) {
3708             snprintf(filename, sizeof(filename), "%s%s/%s.avpreset", base[i],
3709                      i != 1 ? "" : "/.avconv", preset_name);
3710             ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
3711         }
3712     }
3713     return ret;
3714 }
3715
3716 static void choose_encoder(OptionsContext *o, AVFormatContext *s, OutputStream *ost)
3717 {
3718     char *codec_name = NULL;
3719
3720     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, ost->st);
3721     if (!codec_name) {
3722         ost->st->codec->codec_id = av_guess_codec(s->oformat, NULL, s->filename,
3723                                                   NULL, ost->st->codec->codec_type);
3724         ost->enc = avcodec_find_encoder(ost->st->codec->codec_id);
3725     } else if (!strcmp(codec_name, "copy"))
3726         ost->stream_copy = 1;
3727     else {
3728         ost->enc = find_codec_or_die(codec_name, ost->st->codec->codec_type, 1);
3729         ost->st->codec->codec_id = ost->enc->id;
3730     }
3731 }
3732
3733 static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, enum AVMediaType type)
3734 {
3735     OutputStream *ost;
3736     AVStream *st = avformat_new_stream(oc, NULL);
3737     int idx      = oc->nb_streams - 1, ret = 0;
3738     char *bsf = NULL, *next, *codec_tag = NULL;
3739     AVBitStreamFilterContext *bsfc, *bsfc_prev = NULL;
3740     double qscale = -1;
3741     char *buf = NULL, *arg = NULL, *preset = NULL;
3742     AVIOContext *s = NULL;
3743
3744     if (!st) {
3745         av_log(NULL, AV_LOG_FATAL, "Could not alloc stream.\n");
3746         exit_program(1);
3747     }
3748
3749     if (oc->nb_streams - 1 < o->nb_streamid_map)
3750         st->id = o->streamid_map[oc->nb_streams - 1];
3751
3752     output_streams = grow_array(output_streams, sizeof(*output_streams), &nb_output_streams,
3753                                 nb_output_streams + 1);
3754     if (!(ost = av_mallocz(sizeof(*ost))))
3755         exit_program(1);
3756     output_streams[nb_output_streams - 1] = ost;
3757
3758     ost->file_index = nb_output_files;
3759     ost->index      = idx;
3760     ost->st         = st;
3761     st->codec->codec_type = type;
3762     choose_encoder(o, oc, ost);
3763     if (ost->enc) {
3764         ost->opts  = filter_codec_opts(codec_opts, ost->enc->id, oc, st);
3765     }
3766
3767     avcodec_get_context_defaults3(st->codec, ost->enc);
3768     st->codec->codec_type = type; // XXX hack, avcodec_get_context_defaults2() sets type to unknown for stream copy
3769
3770     MATCH_PER_STREAM_OPT(presets, str, preset, oc, st);
3771     if (preset && (!(ret = get_preset_file_2(preset, ost->enc->name, &s)))) {
3772         do  {
3773             buf = get_line(s);
3774             if (!buf[0] || buf[0] == '#') {
3775                 av_free(buf);
3776                 continue;
3777             }
3778             if (!(arg = strchr(buf, '='))) {
3779                 av_log(NULL, AV_LOG_FATAL, "Invalid line found in the preset file.\n");
3780                 exit_program(1);
3781             }
3782             *arg++ = 0;
3783             av_dict_set(&ost->opts, buf, arg, AV_DICT_DONT_OVERWRITE);
3784             av_free(buf);
3785         } while (!s->eof_reached);
3786         avio_close(s);
3787     }
3788     if (ret) {
3789         av_log(NULL, AV_LOG_FATAL,
3790                "Preset %s specified for stream %d:%d, but could not be opened.\n",
3791                preset, ost->file_index, ost->index);
3792         exit_program(1);
3793     }
3794
3795     ost->max_frames = INT64_MAX;
3796     MATCH_PER_STREAM_OPT(max_frames, i64, ost->max_frames, oc, st);
3797
3798     MATCH_PER_STREAM_OPT(bitstream_filters, str, bsf, oc, st);
3799     while (bsf) {
3800         if (next = strchr(bsf, ','))
3801             *next++ = 0;
3802         if (!(bsfc = av_bitstream_filter_init(bsf))) {
3803             av_log(NULL, AV_LOG_FATAL, "Unknown bitstream filter %s\n", bsf);
3804             exit_program(1);
3805         }
3806         if (bsfc_prev)
3807             bsfc_prev->next = bsfc;
3808         else
3809             ost->bitstream_filters = bsfc;
3810
3811         bsfc_prev = bsfc;
3812         bsf       = next;
3813     }
3814
3815     MATCH_PER_STREAM_OPT(codec_tags, str, codec_tag, oc, st);
3816     if (codec_tag) {
3817         uint32_t tag = strtol(codec_tag, &next, 0);
3818         if (*next)
3819             tag = AV_RL32(codec_tag);
3820         st->codec->codec_tag = tag;
3821     }
3822
3823     MATCH_PER_STREAM_OPT(qscale, dbl, qscale, oc, st);
3824     if (qscale >= 0 || same_quant) {
3825         st->codec->flags |= CODEC_FLAG_QSCALE;
3826         st->codec->global_quality = FF_QP2LAMBDA * qscale;
3827     }
3828
3829     if (oc->oformat->flags & AVFMT_GLOBALHEADER)
3830         st->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
3831
3832     av_opt_get_int(sws_opts, "sws_flags", 0, &ost->sws_flags);
3833
3834     ost->pix_fmts[0] = ost->pix_fmts[1] = PIX_FMT_NONE;
3835
3836     return ost;
3837 }
3838
3839 static void parse_matrix_coeffs(uint16_t *dest, const char *str)
3840 {
3841     int i;
3842     const char *p = str;
3843     for (i = 0;; i++) {
3844         dest[i] = atoi(p);
3845         if (i == 63)
3846             break;
3847         p = strchr(p, ',');
3848         if (!p) {
3849             av_log(NULL, AV_LOG_FATAL, "Syntax error in matrix \"%s\" at coeff %d\n", str, i);
3850             exit_program(1);
3851         }
3852         p++;
3853     }
3854 }
3855
3856 static OutputStream *new_video_stream(OptionsContext *o, AVFormatContext *oc)
3857 {
3858     AVStream *st;
3859     OutputStream *ost;
3860     AVCodecContext *video_enc;
3861
3862     ost = new_output_stream(o, oc, AVMEDIA_TYPE_VIDEO);
3863     st  = ost->st;
3864     video_enc = st->codec;
3865
3866     if (!ost->stream_copy) {
3867         const char *p = NULL;
3868         char *forced_key_frames = NULL, *frame_rate = NULL, *frame_size = NULL;
3869         char *frame_aspect_ratio = NULL, *frame_pix_fmt = NULL;
3870         char *intra_matrix = NULL, *inter_matrix = NULL;
3871         const char *filters = "null";
3872         int i;
3873
3874         MATCH_PER_STREAM_OPT(frame_rates, str, frame_rate, oc, st);
3875         if (frame_rate && av_parse_video_rate(&ost->frame_rate, frame_rate) < 0) {
3876             av_log(NULL, AV_LOG_FATAL, "Invalid framerate value: %s\n", frame_rate);
3877             exit_program(1);
3878         }
3879
3880         MATCH_PER_STREAM_OPT(frame_sizes, str, frame_size, oc, st);
3881         if (frame_size && av_parse_video_size(&video_enc->width, &video_enc->height, frame_size) < 0) {
3882             av_log(NULL, AV_LOG_FATAL, "Invalid frame size: %s.\n", frame_size);
3883             exit_program(1);
3884         }
3885
3886         MATCH_PER_STREAM_OPT(frame_aspect_ratios, str, frame_aspect_ratio, oc, st);
3887         if (frame_aspect_ratio)
3888             ost->frame_aspect_ratio = parse_frame_aspect_ratio(frame_aspect_ratio);
3889
3890         MATCH_PER_STREAM_OPT(frame_pix_fmts, str, frame_pix_fmt, oc, st);
3891         if (frame_pix_fmt && (video_enc->pix_fmt = av_get_pix_fmt(frame_pix_fmt)) == PIX_FMT_NONE) {
3892             av_log(NULL, AV_LOG_FATAL, "Unknown pixel format requested: %s.\n", frame_pix_fmt);
3893             exit_program(1);
3894         }
3895         st->sample_aspect_ratio = video_enc->sample_aspect_ratio;
3896
3897         MATCH_PER_STREAM_OPT(intra_matrices, str, intra_matrix, oc, st);
3898         if (intra_matrix) {
3899             if (!(video_enc->intra_matrix = av_mallocz(sizeof(*video_enc->intra_matrix) * 64))) {
3900                 av_log(NULL, AV_LOG_FATAL, "Could not allocate memory for intra matrix.\n");
3901                 exit_program(1);
3902             }
3903             parse_matrix_coeffs(video_enc->intra_matrix, intra_matrix);
3904         }
3905         MATCH_PER_STREAM_OPT(inter_matrices, str, inter_matrix, oc, st);
3906         if (inter_matrix) {
3907             if (!(video_enc->inter_matrix = av_mallocz(sizeof(*video_enc->inter_matrix) * 64))) {
3908                 av_log(NULL, AV_LOG_FATAL, "Could not allocate memory for inter matrix.\n");
3909                 exit_program(1);
3910             }
3911             parse_matrix_coeffs(video_enc->inter_matrix, inter_matrix);
3912         }
3913
3914         MATCH_PER_STREAM_OPT(rc_overrides, str, p, oc, st);
3915         for (i = 0; p; i++) {
3916             int start, end, q;
3917             int e = sscanf(p, "%d,%d,%d", &start, &end, &q);
3918             if (e != 3) {
3919                 av_log(NULL, AV_LOG_FATAL, "error parsing rc_override\n");
3920                 exit_program(1);
3921             }
3922             video_enc->rc_override =
3923                 av_realloc(video_enc->rc_override,
3924                            sizeof(RcOverride) * (i + 1));
3925             video_enc->rc_override[i].start_frame = start;
3926             video_enc->rc_override[i].end_frame   = end;
3927             if (q > 0) {
3928                 video_enc->rc_override[i].qscale         = q;
3929                 video_enc->rc_override[i].quality_factor = 1.0;
3930             }
3931             else {
3932                 video_enc->rc_override[i].qscale         = 0;
3933                 video_enc->rc_override[i].quality_factor = -q/100.0;
3934             }
3935             p = strchr(p, '/');
3936             if (p) p++;
3937         }
3938         video_enc->rc_override_count = i;
3939         if (!video_enc->rc_initial_buffer_occupancy)
3940             video_enc->rc_initial_buffer_occupancy = video_enc->rc_buffer_size * 3 / 4;
3941         video_enc->intra_dc_precision = intra_dc_precision - 8;
3942
3943         /* two pass mode */
3944         if (do_pass) {
3945             if (do_pass == 1) {
3946                 video_enc->flags |= CODEC_FLAG_PASS1;
3947             } else {
3948                 video_enc->flags |= CODEC_FLAG_PASS2;
3949             }
3950         }
3951
3952         MATCH_PER_STREAM_OPT(forced_key_frames, str, forced_key_frames, oc, st);
3953         if (forced_key_frames)
3954             parse_forced_key_frames(forced_key_frames, ost, video_enc);
3955
3956         MATCH_PER_STREAM_OPT(force_fps, i, ost->force_fps, oc, st);
3957
3958         ost->top_field_first = -1;
3959         MATCH_PER_STREAM_OPT(top_field_first, i, ost->top_field_first, oc, st);
3960
3961         MATCH_PER_STREAM_OPT(filters, str, filters, oc, st);
3962         ost->avfilter = av_strdup(filters);
3963     } else {
3964         MATCH_PER_STREAM_OPT(copy_initial_nonkeyframes, i, ost->copy_initial_nonkeyframes, oc ,st);
3965     }
3966
3967     return ost;
3968 }
3969
3970 static OutputStream *new_audio_stream(OptionsContext *o, AVFormatContext *oc)
3971 {
3972     AVStream *st;
3973     OutputStream *ost;
3974     AVCodecContext *audio_enc;
3975
3976     ost = new_output_stream(o, oc, AVMEDIA_TYPE_AUDIO);
3977     st  = ost->st;
3978
3979     audio_enc = st->codec;
3980     audio_enc->codec_type = AVMEDIA_TYPE_AUDIO;
3981
3982     if (!ost->stream_copy) {
3983         char *sample_fmt = NULL;
3984         const char *filters = "anull";
3985
3986         MATCH_PER_STREAM_OPT(audio_channels, i, audio_enc->channels, oc, st);
3987
3988         MATCH_PER_STREAM_OPT(sample_fmts, str, sample_fmt, oc, st);
3989         if (sample_fmt &&
3990             (audio_enc->sample_fmt = av_get_sample_fmt(sample_fmt)) == AV_SAMPLE_FMT_NONE) {
3991             av_log(NULL, AV_LOG_FATAL, "Invalid sample format '%s'\n", sample_fmt);
3992             exit_program(1);
3993         }
3994
3995         MATCH_PER_STREAM_OPT(audio_sample_rate, i, audio_enc->sample_rate, oc, st);
3996
3997         MATCH_PER_STREAM_OPT(filters, str, filters, oc, st);
3998         ost->avfilter = av_strdup(filters);
3999     }
4000
4001     return ost;
4002 }
4003
4004 static OutputStream *new_data_stream(OptionsContext *o, AVFormatContext *oc)
4005 {
4006     OutputStream *ost;
4007
4008     ost = new_output_stream(o, oc, AVMEDIA_TYPE_DATA);
4009     if (!ost->stream_copy) {
4010         av_log(NULL, AV_LOG_FATAL, "Data stream encoding not supported yet (only streamcopy)\n");
4011         exit_program(1);
4012     }
4013
4014     return ost;
4015 }
4016
4017 static OutputStream *new_attachment_stream(OptionsContext *o, AVFormatContext *oc)
4018 {
4019     OutputStream *ost = new_output_stream(o, oc, AVMEDIA_TYPE_ATTACHMENT);
4020     ost->stream_copy = 1;
4021     return ost;
4022 }
4023
4024 static OutputStream *new_subtitle_stream(OptionsContext *o, AVFormatContext *oc)
4025 {
4026     AVStream *st;
4027     OutputStream *ost;
4028     AVCodecContext *subtitle_enc;
4029
4030     ost = new_output_stream(o, oc, AVMEDIA_TYPE_SUBTITLE);
4031     st  = ost->st;
4032     subtitle_enc = st->codec;
4033
4034     subtitle_enc->codec_type = AVMEDIA_TYPE_SUBTITLE;
4035
4036     return ost;
4037 }
4038
4039 /* arg format is "output-stream-index:streamid-value". */
4040 static int opt_streamid(OptionsContext *o, const char *opt, const char *arg)
4041 {
4042     int idx;
4043     char *p;
4044     char idx_str[16];
4045
4046     av_strlcpy(idx_str, arg, sizeof(idx_str));
4047     p = strchr(idx_str, ':');
4048     if (!p) {
4049         av_log(NULL, AV_LOG_FATAL,
4050                "Invalid value '%s' for option '%s', required syntax is 'index:value'\n",
4051                arg, opt);
4052         exit_program(1);
4053     }
4054     *p++ = '\0';
4055     idx = parse_number_or_die(opt, idx_str, OPT_INT, 0, INT_MAX);
4056     o->streamid_map = grow_array(o->streamid_map, sizeof(*o->streamid_map), &o->nb_streamid_map, idx+1);
4057     o->streamid_map[idx] = parse_number_or_die(opt, p, OPT_INT, 0, INT_MAX);
4058     return 0;
4059 }
4060
4061 static int copy_chapters(InputFile *ifile, OutputFile *ofile, int copy_metadata)
4062 {
4063     AVFormatContext *is = ifile->ctx;
4064     AVFormatContext *os = ofile->ctx;
4065     int i;
4066
4067     for (i = 0; i < is->nb_chapters; i++) {
4068         AVChapter *in_ch = is->chapters[i], *out_ch;
4069         int64_t ts_off   = av_rescale_q(ofile->start_time - ifile->ts_offset,
4070                                        AV_TIME_BASE_Q, in_ch->time_base);
4071         int64_t rt       = (ofile->recording_time == INT64_MAX) ? INT64_MAX :
4072                            av_rescale_q(ofile->recording_time, AV_TIME_BASE_Q, in_ch->time_base);
4073
4074
4075         if (in_ch->end < ts_off)
4076             continue;
4077         if (rt != INT64_MAX && in_ch->start > rt + ts_off)
4078             break;
4079
4080         out_ch = av_mallocz(sizeof(AVChapter));
4081         if (!out_ch)
4082             return AVERROR(ENOMEM);
4083
4084         out_ch->id        = in_ch->id;
4085         out_ch->time_base = in_ch->time_base;
4086         out_ch->start     = FFMAX(0,  in_ch->start - ts_off);
4087         out_ch->end       = FFMIN(rt, in_ch->end   - ts_off);
4088
4089         if (copy_metadata)
4090             av_dict_copy(&out_ch->metadata, in_ch->metadata, 0);
4091
4092         os->nb_chapters++;
4093         os->chapters = av_realloc(os->chapters, sizeof(AVChapter) * os->nb_chapters);
4094         if (!os->chapters)
4095             return AVERROR(ENOMEM);
4096         os->chapters[os->nb_chapters - 1] = out_ch;
4097     }
4098     return 0;
4099 }
4100
4101 static void init_output_filter(OutputFilter *ofilter, OptionsContext *o,
4102                                AVFormatContext *oc)
4103 {
4104     OutputStream *ost;
4105
4106     switch (avfilter_pad_get_type(ofilter->out_tmp->filter_ctx->output_pads,
4107                                   ofilter->out_tmp->pad_idx)) {
4108     case AVMEDIA_TYPE_VIDEO: ost = new_video_stream(o, oc); break;
4109     case AVMEDIA_TYPE_AUDIO: ost = new_audio_stream(o, oc); break;
4110     default:
4111         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters are supported "
4112                "currently.\n");
4113         exit_program(1);
4114     }
4115
4116     ost->source_index = -1;
4117     ost->filter       = ofilter;
4118
4119     ofilter->ost      = ost;
4120
4121     if (ost->stream_copy) {
4122         av_log(NULL, AV_LOG_ERROR, "Streamcopy requested for output stream %d:%d, "
4123                "which is fed from a complex filtergraph. Filtering and streamcopy "
4124                "cannot be used together.\n", ost->file_index, ost->index);
4125         exit_program(1);
4126     }
4127
4128     if (configure_output_filter(ofilter->graph, ofilter, ofilter->out_tmp) < 0) {
4129         av_log(NULL, AV_LOG_FATAL, "Error configuring filter.\n");
4130         exit_program(1);
4131     }
4132     avfilter_inout_free(&ofilter->out_tmp);
4133 }
4134
4135 static void opt_output_file(void *optctx, const char *filename)
4136 {
4137     OptionsContext *o = optctx;
4138     AVFormatContext *oc;
4139     int i, j, err;
4140     AVOutputFormat *file_oformat;
4141     OutputStream *ost;
4142     InputStream  *ist;
4143
4144     if (configure_complex_filters() < 0) {
4145         av_log(NULL, AV_LOG_FATAL, "Error configuring filters.\n");
4146         exit_program(1);
4147     }
4148
4149     if (!strcmp(filename, "-"))
4150         filename = "pipe:";
4151
4152     oc = avformat_alloc_context();
4153     if (!oc) {
4154         print_error(filename, AVERROR(ENOMEM));
4155         exit_program(1);
4156     }
4157
4158     if (o->format) {
4159         file_oformat = av_guess_format(o->format, NULL, NULL);
4160         if (!file_oformat) {
4161             av_log(NULL, AV_LOG_FATAL, "Requested output format '%s' is not a suitable output format\n", o->format);
4162             exit_program(1);
4163         }
4164     } else {
4165         file_oformat = av_guess_format(NULL, filename, NULL);
4166         if (!file_oformat) {
4167             av_log(NULL, AV_LOG_FATAL, "Unable to find a suitable output format for '%s'\n",
4168                    filename);
4169             exit_program(1);
4170         }
4171     }
4172
4173     oc->oformat = file_oformat;
4174     oc->interrupt_callback = int_cb;
4175     av_strlcpy(oc->filename, filename, sizeof(oc->filename));
4176
4177     /* create streams for all unlabeled output pads */
4178     for (i = 0; i < nb_filtergraphs; i++) {
4179         FilterGraph *fg = filtergraphs[i];
4180         for (j = 0; j < fg->nb_outputs; j++) {
4181             OutputFilter *ofilter = fg->outputs[j];
4182
4183             if (!ofilter->out_tmp || ofilter->out_tmp->name)
4184                 continue;
4185
4186             switch (avfilter_pad_get_type(ofilter->out_tmp->filter_ctx->output_pads,
4187                                           ofilter->out_tmp->pad_idx)) {
4188             case AVMEDIA_TYPE_VIDEO:    o->video_disable    = 1; break;
4189             case AVMEDIA_TYPE_AUDIO:    o->audio_disable    = 1; break;
4190             case AVMEDIA_TYPE_SUBTITLE: o->subtitle_disable = 1; break;
4191             }
4192             init_output_filter(ofilter, o, oc);
4193         }
4194     }
4195
4196     if (!o->nb_stream_maps) {
4197         /* pick the "best" stream of each type */
4198 #define NEW_STREAM(type, index)\
4199         if (index >= 0) {\
4200             ost = new_ ## type ## _stream(o, oc);\
4201             ost->source_index = index;\
4202             ost->sync_ist     = input_streams[index];\
4203             input_streams[index]->discard = 0;\
4204             input_streams[index]->st->discard = AVDISCARD_NONE;\
4205         }
4206
4207         /* video: highest resolution */
4208         if (!o->video_disable && oc->oformat->video_codec != CODEC_ID_NONE) {
4209             int area = 0, idx = -1;
4210             for (i = 0; i < nb_input_streams; i++) {
4211                 ist = input_streams[i];
4212                 if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
4213                     ist->st->codec->width * ist->st->codec->height > area) {
4214                     area = ist->st->codec->width * ist->st->codec->height;
4215                     idx = i;
4216                 }
4217             }
4218             NEW_STREAM(video, idx);
4219         }
4220
4221         /* audio: most channels */
4222         if (!o->audio_disable && oc->oformat->audio_codec != CODEC_ID_NONE) {
4223             int channels = 0, idx = -1;
4224             for (i = 0; i < nb_input_streams; i++) {
4225                 ist = input_streams[i];
4226                 if (ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
4227                     ist->st->codec->channels > channels) {
4228                     channels = ist->st->codec->channels;
4229                     idx = i;
4230                 }
4231             }
4232             NEW_STREAM(audio, idx);
4233         }
4234
4235         /* subtitles: pick first */
4236         if (!o->subtitle_disable && oc->oformat->subtitle_codec != CODEC_ID_NONE) {
4237             for (i = 0; i < nb_input_streams; i++)
4238                 if (input_streams[i]->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
4239                     NEW_STREAM(subtitle, i);
4240                     break;
4241                 }
4242         }
4243         /* do something with data? */
4244     } else {
4245         for (i = 0; i < o->nb_stream_maps; i++) {
4246             StreamMap *map = &o->stream_maps[i];
4247
4248             if (map->disabled)
4249                 continue;
4250
4251             if (map->linklabel) {
4252                 FilterGraph *fg;
4253                 OutputFilter *ofilter = NULL;
4254                 int j, k;
4255
4256                 for (j = 0; j < nb_filtergraphs; j++) {
4257                     fg = filtergraphs[j];
4258                     for (k = 0; k < fg->nb_outputs; k++) {
4259                         AVFilterInOut *out = fg->outputs[k]->out_tmp;
4260                         if (out && !strcmp(out->name, map->linklabel)) {
4261                             ofilter = fg->outputs[k];
4262                             goto loop_end;
4263                         }
4264                     }
4265                 }
4266 loop_end:
4267                 if (!ofilter) {
4268                     av_log(NULL, AV_LOG_FATAL, "Output with label '%s' does not exist "
4269                            "in any defined filter graph.\n", map->linklabel);
4270                     exit_program(1);
4271                 }
4272                 init_output_filter(ofilter, o, oc);
4273             } else {
4274                 ist = input_streams[input_files[map->file_index]->ist_index + map->stream_index];
4275                 switch (ist->st->codec->codec_type) {
4276                 case AVMEDIA_TYPE_VIDEO:    ost = new_video_stream(o, oc);    break;
4277                 case AVMEDIA_TYPE_AUDIO:    ost = new_audio_stream(o, oc);    break;
4278                 case AVMEDIA_TYPE_SUBTITLE: ost = new_subtitle_stream(o, oc); break;
4279                 case AVMEDIA_TYPE_DATA:     ost = new_data_stream(o, oc);     break;
4280                 case AVMEDIA_TYPE_ATTACHMENT: ost = new_attachment_stream(o, oc); break;
4281                 default:
4282                     av_log(NULL, AV_LOG_FATAL, "Cannot map stream #%d:%d - unsupported type.\n",
4283                            map->file_index, map->stream_index);
4284                     exit_program(1);
4285                 }
4286
4287                 ost->source_index = input_files[map->file_index]->ist_index + map->stream_index;
4288                 ost->sync_ist     = input_streams[input_files[map->sync_file_index]->ist_index +
4289                                                map->sync_stream_index];
4290                 ist->discard = 0;
4291                 ist->st->discard = AVDISCARD_NONE;
4292             }
4293         }
4294     }
4295
4296     /* handle attached files */
4297     for (i = 0; i < o->nb_attachments; i++) {
4298         AVIOContext *pb;
4299         uint8_t *attachment;
4300         const char *p;
4301         int64_t len;
4302
4303         if ((err = avio_open2(&pb, o->attachments[i], AVIO_FLAG_READ, &int_cb, NULL)) < 0) {
4304             av_log(NULL, AV_LOG_FATAL, "Could not open attachment file %s.\n",
4305                    o->attachments[i]);
4306             exit_program(1);
4307         }
4308         if ((len = avio_size(pb)) <= 0) {
4309             av_log(NULL, AV_LOG_FATAL, "Could not get size of the attachment %s.\n",
4310                    o->attachments[i]);
4311             exit_program(1);
4312         }
4313         if (!(attachment = av_malloc(len))) {
4314             av_log(NULL, AV_LOG_FATAL, "Attachment %s too large to fit into memory.\n",
4315                    o->attachments[i]);
4316             exit_program(1);
4317         }
4318         avio_read(pb, attachment, len);
4319
4320         ost = new_attachment_stream(o, oc);
4321         ost->stream_copy               = 0;
4322         ost->source_index              = -1;
4323         ost->attachment_filename       = o->attachments[i];
4324         ost->st->codec->extradata      = attachment;
4325         ost->st->codec->extradata_size = len;
4326
4327         p = strrchr(o->attachments[i], '/');
4328         av_dict_set(&ost->st->metadata, "filename", (p && *p) ? p + 1 : o->attachments[i], AV_DICT_DONT_OVERWRITE);
4329         avio_close(pb);
4330     }
4331
4332     output_files = grow_array(output_files, sizeof(*output_files), &nb_output_files, nb_output_files + 1);
4333     if (!(output_files[nb_output_files - 1] = av_mallocz(sizeof(*output_files[0]))))
4334         exit_program(1);
4335
4336     output_files[nb_output_files - 1]->ctx            = oc;
4337     output_files[nb_output_files - 1]->ost_index      = nb_output_streams - oc->nb_streams;
4338     output_files[nb_output_files - 1]->recording_time = o->recording_time;
4339     if (o->recording_time != INT64_MAX)
4340         oc->duration = o->recording_time;
4341     output_files[nb_output_files - 1]->start_time     = o->start_time;
4342     output_files[nb_output_files - 1]->limit_filesize = o->limit_filesize;
4343     av_dict_copy(&output_files[nb_output_files - 1]->opts, format_opts, 0);
4344
4345     /* check filename in case of an image number is expected */
4346     if (oc->oformat->flags & AVFMT_NEEDNUMBER) {
4347         if (!av_filename_number_test(oc->filename)) {
4348             print_error(oc->filename, AVERROR(EINVAL));
4349             exit_program(1);
4350         }
4351     }
4352
4353     if (!(oc->oformat->flags & AVFMT_NOFILE)) {
4354         /* test if it already exists to avoid losing precious files */
4355         assert_file_overwrite(filename);
4356
4357         /* open the file */
4358         if ((err = avio_open2(&oc->pb, filename, AVIO_FLAG_WRITE,
4359                               &oc->interrupt_callback,
4360                               &output_files[nb_output_files - 1]->opts)) < 0) {
4361             print_error(filename, err);