lavfi: make AVFilterPad opaque after two major bumps.
[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 <unistd.h>
31 #include "libavformat/avformat.h"
32 #include "libavdevice/avdevice.h"
33 #include "libswscale/swscale.h"
34 #include "libavresample/avresample.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/audioconvert.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/samplefmt.h"
39 #include "libavutil/colorspace.h"
40 #include "libavutil/fifo.h"
41 #include "libavutil/intreadwrite.h"
42 #include "libavutil/dict.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/pixdesc.h"
45 #include "libavutil/avstring.h"
46 #include "libavutil/libm.h"
47 #include "libavutil/imgutils.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/time.h>
59 #include <sys/resource.h>
60 #elif HAVE_GETPROCESSTIMES
61 #include <windows.h>
62 #endif
63 #if HAVE_GETPROCESSMEMORYINFO
64 #include <windows.h>
65 #include <psapi.h>
66 #endif
67
68 #if HAVE_SYS_SELECT_H
69 #include <sys/select.h>
70 #endif
71
72 #if HAVE_PTHREADS
73 #include <pthread.h>
74 #endif
75
76 #include <time.h>
77
78 #include "cmdutils.h"
79
80 #include "libavutil/avassert.h"
81
82 #define VSYNC_AUTO       -1
83 #define VSYNC_PASSTHROUGH 0
84 #define VSYNC_CFR         1
85 #define VSYNC_VFR         2
86
87 const char program_name[] = "avconv";
88 const int program_birth_year = 2000;
89
90 /* select an input stream for an output stream */
91 typedef struct StreamMap {
92     int disabled;           /** 1 is this mapping is disabled by a negative map */
93     int file_index;
94     int stream_index;
95     int sync_file_index;
96     int sync_stream_index;
97     char *linklabel;       /** name of an output link, for mapping lavfi outputs */
98 } StreamMap;
99
100 /**
101  * select an input file for an output file
102  */
103 typedef struct MetadataMap {
104     int  file;      ///< file index
105     char type;      ///< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
106     int  index;     ///< stream/chapter/program number
107 } MetadataMap;
108
109 static const OptionDef options[];
110
111 static int video_discard = 0;
112 static int same_quant = 0;
113 static int do_deinterlace = 0;
114 static int intra_dc_precision = 8;
115 static int qp_hist = 0;
116
117 static int file_overwrite = 0;
118 static int do_benchmark = 0;
119 static int do_hex_dump = 0;
120 static int do_pkt_dump = 0;
121 static int do_pass = 0;
122 static char *pass_logfilename_prefix = NULL;
123 static int video_sync_method = VSYNC_AUTO;
124 static int audio_sync_method = 0;
125 static float audio_drift_threshold = 0.1;
126 static int copy_ts = 0;
127 static int copy_tb = 1;
128 static int opt_shortest = 0;
129 static char *vstats_filename;
130 static FILE *vstats_file;
131
132 static int audio_volume = 256;
133
134 static int exit_on_error = 0;
135 static int using_stdin = 0;
136 static int64_t video_size = 0;
137 static int64_t audio_size = 0;
138 static int64_t extra_size = 0;
139 static int nb_frames_dup = 0;
140 static int nb_frames_drop = 0;
141 static int input_sync;
142
143 static float dts_delta_threshold = 10;
144
145 static int print_stats = 1;
146
147 #if HAVE_PTHREADS
148 /* signal to input threads that they should exit; set by the main thread */
149 static int transcoding_finished;
150 #endif
151
152 #define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
153
154 typedef struct InputFilter {
155     AVFilterContext    *filter;
156     struct InputStream *ist;
157     struct FilterGraph *graph;
158     uint8_t            *name;
159 } InputFilter;
160
161 typedef struct OutputFilter {
162     AVFilterContext     *filter;
163     struct OutputStream *ost;
164     struct FilterGraph  *graph;
165     uint8_t             *name;
166
167     /* temporary storage until stream maps are processed */
168     AVFilterInOut       *out_tmp;
169 } OutputFilter;
170
171 typedef struct FilterGraph {
172     int            index;
173     const char    *graph_desc;
174
175     AVFilterGraph *graph;
176
177     InputFilter   **inputs;
178     int          nb_inputs;
179     OutputFilter **outputs;
180     int         nb_outputs;
181 } FilterGraph;
182
183 typedef struct InputStream {
184     int file_index;
185     AVStream *st;
186     int discard;             /* true if stream data should be discarded */
187     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
188     AVCodec *dec;
189     AVFrame *decoded_frame;
190
191     int64_t       start;     /* time when read started */
192     /* predicted dts of the next packet read for this stream or (when there are
193      * several frames in a packet) of the next frame in current packet */
194     int64_t       next_dts;
195     /* dts of the last packet read for this stream */
196     int64_t       last_dts;
197     PtsCorrectionContext pts_ctx;
198     double ts_scale;
199     int is_start;            /* is 1 at the start and after a discontinuity */
200     int showed_multi_packet_warning;
201     AVDictionary *opts;
202     AVRational framerate;               /* framerate forced with -r */
203
204     int resample_height;
205     int resample_width;
206     int resample_pix_fmt;
207
208     int      resample_sample_fmt;
209     int      resample_sample_rate;
210     int      resample_channels;
211     uint64_t resample_channel_layout;
212
213     /* a pool of free buffers for decoded data */
214     FrameBuffer *buffer_pool;
215
216     /* decoded data from this stream goes into all those filters
217      * currently video and audio only */
218     InputFilter **filters;
219     int        nb_filters;
220 } InputStream;
221
222 typedef struct InputFile {
223     AVFormatContext *ctx;
224     int eof_reached;      /* true if eof reached */
225     int ist_index;        /* index of first stream in ist_table */
226     int buffer_size;      /* current total buffer size */
227     int64_t ts_offset;
228     int nb_streams;       /* number of stream that avconv is aware of; may be different
229                              from ctx.nb_streams if new streams appear during av_read_frame() */
230     int rate_emu;
231
232 #if HAVE_PTHREADS
233     pthread_t thread;           /* thread reading from this file */
234     int finished;               /* the thread has exited */
235     int joined;                 /* the thread has been joined */
236     pthread_mutex_t fifo_lock;  /* lock for access to fifo */
237     pthread_cond_t  fifo_cond;  /* the main thread will signal on this cond after reading from fifo */
238     AVFifoBuffer *fifo;         /* demuxed packets are stored here; freed by the main thread */
239 #endif
240 } InputFile;
241
242 typedef struct OutputStream {
243     int file_index;          /* file index */
244     int index;               /* stream index in the output file */
245     int source_index;        /* InputStream index */
246     AVStream *st;            /* stream in the output file */
247     int encoding_needed;     /* true if encoding needed for this stream */
248     int frame_number;
249     /* input pts and corresponding output pts
250        for A/V sync */
251     // double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
252     struct InputStream *sync_ist; /* input stream to sync against */
253     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
254     /* pts of the first frame encoded for this stream, used for limiting
255      * recording time */
256     int64_t first_pts;
257     AVBitStreamFilterContext *bitstream_filters;
258     AVCodec *enc;
259     int64_t max_frames;
260     AVFrame *filtered_frame;
261
262     /* video only */
263     AVRational frame_rate;
264     int force_fps;
265     int top_field_first;
266
267     float frame_aspect_ratio;
268     float last_quality;
269
270     /* forced key frames */
271     int64_t *forced_kf_pts;
272     int forced_kf_count;
273     int forced_kf_index;
274
275     FILE *logfile;
276
277     OutputFilter *filter;
278     char *avfilter;
279
280     int64_t sws_flags;
281     AVDictionary *opts;
282     int is_past_recording_time;
283     int stream_copy;
284     const char *attachment_filename;
285     int copy_initial_nonkeyframes;
286
287     enum PixelFormat pix_fmts[2];
288 } OutputStream;
289
290
291 typedef struct OutputFile {
292     AVFormatContext *ctx;
293     AVDictionary *opts;
294     int ost_index;       /* index of the first stream in output_streams */
295     int64_t recording_time; /* desired length of the resulting file in microseconds */
296     int64_t start_time;     /* start time in microseconds */
297     uint64_t limit_filesize;
298 } OutputFile;
299
300 static InputStream **input_streams = NULL;
301 static int        nb_input_streams = 0;
302 static InputFile   **input_files   = NULL;
303 static int        nb_input_files   = 0;
304
305 static OutputStream **output_streams = NULL;
306 static int         nb_output_streams = 0;
307 static OutputFile   **output_files   = NULL;
308 static int         nb_output_files   = 0;
309
310 static FilterGraph **filtergraphs;
311 int               nb_filtergraphs;
312
313 typedef struct OptionsContext {
314     /* input/output options */
315     int64_t start_time;
316     const char *format;
317
318     SpecifierOpt *codec_names;
319     int        nb_codec_names;
320     SpecifierOpt *audio_channels;
321     int        nb_audio_channels;
322     SpecifierOpt *audio_sample_rate;
323     int        nb_audio_sample_rate;
324     SpecifierOpt *frame_rates;
325     int        nb_frame_rates;
326     SpecifierOpt *frame_sizes;
327     int        nb_frame_sizes;
328     SpecifierOpt *frame_pix_fmts;
329     int        nb_frame_pix_fmts;
330
331     /* input options */
332     int64_t input_ts_offset;
333     int rate_emu;
334
335     SpecifierOpt *ts_scale;
336     int        nb_ts_scale;
337     SpecifierOpt *dump_attachment;
338     int        nb_dump_attachment;
339
340     /* output options */
341     StreamMap *stream_maps;
342     int     nb_stream_maps;
343     /* first item specifies output metadata, second is input */
344     MetadataMap (*meta_data_maps)[2];
345     int nb_meta_data_maps;
346     int metadata_global_manual;
347     int metadata_streams_manual;
348     int metadata_chapters_manual;
349     const char **attachments;
350     int       nb_attachments;
351
352     int chapters_input_file;
353
354     int64_t recording_time;
355     uint64_t limit_filesize;
356     float mux_preload;
357     float mux_max_delay;
358
359     int video_disable;
360     int audio_disable;
361     int subtitle_disable;
362     int data_disable;
363
364     /* indexed by output file stream index */
365     int   *streamid_map;
366     int nb_streamid_map;
367
368     SpecifierOpt *metadata;
369     int        nb_metadata;
370     SpecifierOpt *max_frames;
371     int        nb_max_frames;
372     SpecifierOpt *bitstream_filters;
373     int        nb_bitstream_filters;
374     SpecifierOpt *codec_tags;
375     int        nb_codec_tags;
376     SpecifierOpt *sample_fmts;
377     int        nb_sample_fmts;
378     SpecifierOpt *qscale;
379     int        nb_qscale;
380     SpecifierOpt *forced_key_frames;
381     int        nb_forced_key_frames;
382     SpecifierOpt *force_fps;
383     int        nb_force_fps;
384     SpecifierOpt *frame_aspect_ratios;
385     int        nb_frame_aspect_ratios;
386     SpecifierOpt *rc_overrides;
387     int        nb_rc_overrides;
388     SpecifierOpt *intra_matrices;
389     int        nb_intra_matrices;
390     SpecifierOpt *inter_matrices;
391     int        nb_inter_matrices;
392     SpecifierOpt *top_field_first;
393     int        nb_top_field_first;
394     SpecifierOpt *metadata_map;
395     int        nb_metadata_map;
396     SpecifierOpt *presets;
397     int        nb_presets;
398     SpecifierOpt *copy_initial_nonkeyframes;
399     int        nb_copy_initial_nonkeyframes;
400     SpecifierOpt *filters;
401     int        nb_filters;
402 } OptionsContext;
403
404 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
405 {\
406     int i, ret;\
407     for (i = 0; i < o->nb_ ## name; i++) {\
408         char *spec = o->name[i].specifier;\
409         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
410             outvar = o->name[i].u.type;\
411         else if (ret < 0)\
412             exit_program(1);\
413     }\
414 }
415
416 static void reset_options(OptionsContext *o)
417 {
418     const OptionDef *po = options;
419     int i;
420
421     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
422     while (po->name) {
423         void *dst = (uint8_t*)o + po->u.off;
424
425         if (po->flags & OPT_SPEC) {
426             SpecifierOpt **so = dst;
427             int i, *count = (int*)(so + 1);
428             for (i = 0; i < *count; i++) {
429                 av_freep(&(*so)[i].specifier);
430                 if (po->flags & OPT_STRING)
431                     av_freep(&(*so)[i].u.str);
432             }
433             av_freep(so);
434             *count = 0;
435         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
436             av_freep(dst);
437         po++;
438     }
439
440     for (i = 0; i < o->nb_stream_maps; i++)
441         av_freep(&o->stream_maps[i].linklabel);
442     av_freep(&o->stream_maps);
443     av_freep(&o->meta_data_maps);
444     av_freep(&o->streamid_map);
445
446     memset(o, 0, sizeof(*o));
447
448     o->mux_max_delay  = 0.7;
449     o->recording_time = INT64_MAX;
450     o->limit_filesize = UINT64_MAX;
451     o->chapters_input_file = INT_MAX;
452
453     uninit_opts();
454     init_opts();
455 }
456
457 /**
458  * Define a function for building a string containing a list of
459  * allowed formats,
460  */
461 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator) \
462 static char *choose_ ## var ## s(OutputStream *ost)                             \
463 {                                                                               \
464     if (ost->st->codec->var != none) {                                          \
465         get_name(ost->st->codec->var);                                          \
466         return av_strdup(name);                                                 \
467     } else if (ost->enc->supported_list) {                                      \
468         const type *p;                                                          \
469         AVIOContext *s = NULL;                                                  \
470         uint8_t *ret;                                                           \
471         int len;                                                                \
472                                                                                 \
473         if (avio_open_dyn_buf(&s) < 0)                                          \
474             exit_program(1);                                                    \
475                                                                                 \
476         for (p = ost->enc->supported_list; *p != none; p++) {                   \
477             get_name(*p);                                                       \
478             avio_printf(s, "%s" separator, name);                               \
479         }                                                                       \
480         len = avio_close_dyn_buf(s, &ret);                                      \
481         ret[len - 1] = 0;                                                       \
482         return ret;                                                             \
483     } else                                                                      \
484         return NULL;                                                            \
485 }
486
487 #define GET_PIX_FMT_NAME(pix_fmt)\
488     const char *name = av_get_pix_fmt_name(pix_fmt);
489
490 DEF_CHOOSE_FORMAT(enum PixelFormat, pix_fmt, pix_fmts, PIX_FMT_NONE,
491                   GET_PIX_FMT_NAME, ":")
492
493 #define GET_SAMPLE_FMT_NAME(sample_fmt)\
494     const char *name = av_get_sample_fmt_name(sample_fmt)
495
496 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
497                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME, ",")
498
499 #define GET_SAMPLE_RATE_NAME(rate)\
500     char name[16];\
501     snprintf(name, sizeof(name), "%d", rate);
502
503 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
504                   GET_SAMPLE_RATE_NAME, ",")
505
506 #define GET_CH_LAYOUT_NAME(ch_layout)\
507     char name[16];\
508     snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
509
510 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
511                   GET_CH_LAYOUT_NAME, ",")
512
513 static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
514 {
515     FilterGraph *fg = av_mallocz(sizeof(*fg));
516
517     if (!fg)
518         exit_program(1);
519     fg->index = nb_filtergraphs;
520
521     fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
522                              fg->nb_outputs + 1);
523     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
524         exit_program(1);
525     fg->outputs[0]->ost   = ost;
526     fg->outputs[0]->graph = fg;
527
528     ost->filter = fg->outputs[0];
529
530     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
531                             fg->nb_inputs + 1);
532     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
533         exit_program(1);
534     fg->inputs[0]->ist   = ist;
535     fg->inputs[0]->graph = fg;
536
537     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
538                               &ist->nb_filters, ist->nb_filters + 1);
539     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
540
541     filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
542                               &nb_filtergraphs, nb_filtergraphs + 1);
543     filtergraphs[nb_filtergraphs - 1] = fg;
544
545     return fg;
546 }
547
548 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
549 {
550     InputStream *ist;
551     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
552     int i;
553
554     // TODO: support other filter types
555     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
556         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
557                "currently.\n");
558         exit_program(1);
559     }
560
561     if (in->name) {
562         AVFormatContext *s;
563         AVStream       *st = NULL;
564         char *p;
565         int file_idx = strtol(in->name, &p, 0);
566
567         if (file_idx < 0 || file_idx >= nb_input_files) {
568             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtegraph description %s.\n",
569                    file_idx, fg->graph_desc);
570             exit_program(1);
571         }
572         s = input_files[file_idx]->ctx;
573
574         for (i = 0; i < s->nb_streams; i++) {
575             if (s->streams[i]->codec->codec_type != type)
576                 continue;
577             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
578                 st = s->streams[i];
579                 break;
580             }
581         }
582         if (!st) {
583             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
584                    "matches no streams.\n", p, fg->graph_desc);
585             exit_program(1);
586         }
587         ist = input_streams[input_files[file_idx]->ist_index + st->index];
588     } else {
589         /* find the first unused stream of corresponding type */
590         for (i = 0; i < nb_input_streams; i++) {
591             ist = input_streams[i];
592             if (ist->st->codec->codec_type == type && ist->discard)
593                 break;
594         }
595         if (i == nb_input_streams) {
596             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
597                    "unlabeled input pad %d on filter %s", in->pad_idx,
598                    in->filter_ctx->name);
599             exit_program(1);
600         }
601     }
602     ist->discard         = 0;
603     ist->decoding_needed = 1;
604     ist->st->discard = AVDISCARD_NONE;
605
606     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
607                             &fg->nb_inputs, fg->nb_inputs + 1);
608     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
609         exit_program(1);
610     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
611     fg->inputs[fg->nb_inputs - 1]->graph = fg;
612
613     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
614                               &ist->nb_filters, ist->nb_filters + 1);
615     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
616 }
617
618 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
619 {
620     char *pix_fmts;
621     OutputStream *ost = ofilter->ost;
622     AVCodecContext *codec = ost->st->codec;
623     AVFilterContext *last_filter = out->filter_ctx;
624     int pad_idx = out->pad_idx;
625     int ret;
626
627
628     ret = avfilter_graph_create_filter(&ofilter->filter,
629                                        avfilter_get_by_name("buffersink"),
630                                        "out", 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         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
643                                                 NULL, args, NULL, fg->graph)) < 0)
644             return ret;
645         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
646             return ret;
647
648         last_filter = filter;
649         pad_idx = 0;
650     }
651
652     if ((pix_fmts = choose_pix_fmts(ost))) {
653         AVFilterContext *filter;
654         if ((ret = avfilter_graph_create_filter(&filter,
655                                                 avfilter_get_by_name("format"),
656                                                 "format", pix_fmts, NULL,
657                                                 fg->graph)) < 0)
658             return ret;
659         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
660             return ret;
661
662         last_filter = filter;
663         pad_idx     = 0;
664         av_freep(&pix_fmts);
665     }
666
667     if (ost->frame_rate.num) {
668         AVFilterContext *fps;
669         char args[255];
670
671         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
672                  ost->frame_rate.den);
673         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
674                                            "fps", args, NULL, fg->graph);
675         if (ret < 0)
676             return ret;
677
678         ret = avfilter_link(last_filter, pad_idx, fps, 0);
679         if (ret < 0)
680             return ret;
681         last_filter = fps;
682         pad_idx = 0;
683     }
684
685     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
686         return ret;
687
688     return 0;
689 }
690
691 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
692 {
693     OutputStream *ost = ofilter->ost;
694     AVCodecContext *codec  = ost->st->codec;
695     AVFilterContext *last_filter = out->filter_ctx;
696     int pad_idx = out->pad_idx;
697     char *sample_fmts, *sample_rates, *channel_layouts;
698     int ret;
699
700     ret = avfilter_graph_create_filter(&ofilter->filter,
701                                        avfilter_get_by_name("abuffersink"),
702                                        "out", NULL, NULL, fg->graph);
703     if (ret < 0)
704         return ret;
705
706     if (codec->channels && !codec->channel_layout)
707         codec->channel_layout = av_get_default_channel_layout(codec->channels);
708
709     sample_fmts     = choose_sample_fmts(ost);
710     sample_rates    = choose_sample_rates(ost);
711     channel_layouts = choose_channel_layouts(ost);
712     if (sample_fmts || sample_rates || channel_layouts) {
713         AVFilterContext *format;
714         char args[256];
715         int len = 0;
716
717         if (sample_fmts)
718             len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
719                             sample_fmts);
720         if (sample_rates)
721             len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
722                             sample_rates);
723         if (channel_layouts)
724             len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
725                             channel_layouts);
726         args[len - 1] = 0;
727
728         av_freep(&sample_fmts);
729         av_freep(&sample_rates);
730         av_freep(&channel_layouts);
731
732         ret = avfilter_graph_create_filter(&format,
733                                            avfilter_get_by_name("aformat"),
734                                            "aformat", args, NULL, fg->graph);
735         if (ret < 0)
736             return ret;
737
738         ret = avfilter_link(last_filter, pad_idx, format, 0);
739         if (ret < 0)
740             return ret;
741
742         last_filter = format;
743         pad_idx = 0;
744     }
745
746     if (audio_sync_method > 0) {
747         AVFilterContext *async;
748         char args[256];
749         int  len = 0;
750
751         av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
752                "asyncts audio filter instead.\n");
753
754         if (audio_sync_method > 1)
755             len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
756                             "max_comp=%d:", audio_sync_method);
757         snprintf(args + len, sizeof(args) - len, "min_delta=%f",
758                  audio_drift_threshold);
759
760         ret = avfilter_graph_create_filter(&async,
761                                            avfilter_get_by_name("asyncts"),
762                                            "async", args, NULL, fg->graph);
763         if (ret < 0)
764             return ret;
765
766         ret = avfilter_link(last_filter, pad_idx, async, 0);
767         if (ret < 0)
768             return ret;
769
770         last_filter = async;
771         pad_idx = 0;
772     }
773
774     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
775         return ret;
776
777     return 0;
778 }
779
780 #define DESCRIBE_FILTER_LINK(f, inout, in)                         \
781 {                                                                  \
782     AVFilterContext *ctx = inout->filter_ctx;                      \
783     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;  \
784     int       nb_pads = in ? ctx->input_count : ctx->output_count; \
785     AVIOContext *pb;                                               \
786                                                                    \
787     if (avio_open_dyn_buf(&pb) < 0)                                \
788         exit_program(1);                                           \
789                                                                    \
790     avio_printf(pb, "%s", ctx->filter->name);                      \
791     if (nb_pads > 1)                                               \
792         avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
793     avio_w8(pb, 0);                                                \
794     avio_close_dyn_buf(pb, &f->name);                              \
795 }
796
797 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
798 {
799     av_freep(&ofilter->name);
800     DESCRIBE_FILTER_LINK(ofilter, out, 0);
801
802     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
803     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
804     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
805     default: av_assert0(0);
806     }
807 }
808
809 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
810                                         AVFilterInOut *in)
811 {
812     AVFilterContext *first_filter = in->filter_ctx;
813     AVFilter *filter = avfilter_get_by_name("buffer");
814     InputStream *ist = ifilter->ist;
815     AVRational tb = ist->framerate.num ? (AVRational){ist->framerate.den,
816                                                       ist->framerate.num} :
817                                          ist->st->time_base;
818     AVRational sar;
819     char args[255];
820     int pad_idx = in->pad_idx;
821     int ret;
822
823     sar = ist->st->sample_aspect_ratio.num ?
824           ist->st->sample_aspect_ratio :
825           ist->st->codec->sample_aspect_ratio;
826     snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
827              ist->st->codec->height, ist->st->codec->pix_fmt,
828              tb.num, tb.den, sar.num, sar.den);
829
830     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, in->name,
831                                             args, NULL, fg->graph)) < 0)
832         return ret;
833
834     if (ist->framerate.num) {
835         AVFilterContext *setpts;
836
837         if ((ret = avfilter_graph_create_filter(&setpts,
838                                                 avfilter_get_by_name("setpts"),
839                                                 "setpts", "N", NULL,
840                                                 fg->graph)) < 0)
841             return ret;
842
843         if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0)
844             return ret;
845
846         first_filter = setpts;
847         pad_idx = 0;
848     }
849
850     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
851         return ret;
852     return 0;
853 }
854
855 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
856                                         AVFilterInOut *in)
857 {
858     AVFilterContext *first_filter = in->filter_ctx;
859     AVFilter *filter = avfilter_get_by_name("abuffer");
860     InputStream *ist = ifilter->ist;
861     int pad_idx = in->pad_idx;
862     char args[255];
863     int ret;
864
865     snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s"
866              ":channel_layout=0x%"PRIx64,
867              ist->st->time_base.num, ist->st->time_base.den,
868              ist->st->codec->sample_rate,
869              av_get_sample_fmt_name(ist->st->codec->sample_fmt),
870              ist->st->codec->channel_layout);
871
872     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter,
873                                             in->name, args, NULL,
874                                             fg->graph)) < 0)
875         return ret;
876
877     if (audio_sync_method > 0) {
878         AVFilterContext *async;
879         char args[256];
880         int  len = 0;
881
882         av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
883                "asyncts audio filter instead.\n");
884
885         if (audio_sync_method > 1)
886             len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
887                             "max_comp=%d:", audio_sync_method);
888         snprintf(args + len, sizeof(args) - len, "min_delta=%f",
889                  audio_drift_threshold);
890
891         ret = avfilter_graph_create_filter(&async,
892                                            avfilter_get_by_name("asyncts"),
893                                            "async", args, NULL, fg->graph);
894         if (ret < 0)
895             return ret;
896
897         ret = avfilter_link(async, 0, first_filter, pad_idx);
898         if (ret < 0)
899             return ret;
900
901         first_filter = async;
902         pad_idx = 0;
903     }
904     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
905         return ret;
906
907     return 0;
908 }
909
910 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
911                                   AVFilterInOut *in)
912 {
913     av_freep(&ifilter->name);
914     DESCRIBE_FILTER_LINK(ifilter, in, 1);
915
916     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
917     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
918     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
919     default: av_assert0(0);
920     }
921 }
922
923 static int configure_filtergraph(FilterGraph *fg)
924 {
925     AVFilterInOut *inputs, *outputs, *cur;
926     int ret, i, init = !fg->graph, simple = !fg->graph_desc;
927     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
928                                       fg->graph_desc;
929
930     avfilter_graph_free(&fg->graph);
931     if (!(fg->graph = avfilter_graph_alloc()))
932         return AVERROR(ENOMEM);
933
934     if (simple) {
935         OutputStream *ost = fg->outputs[0]->ost;
936         char args[255];
937         snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
938         fg->graph->scale_sws_opts = av_strdup(args);
939     }
940
941     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
942         return ret;
943
944     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
945         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
946                "exactly one input and output.\n", graph_desc);
947         return AVERROR(EINVAL);
948     }
949
950     for (cur = inputs; !simple && init && cur; cur = cur->next)
951         init_input_filter(fg, cur);
952
953     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
954         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
955             return ret;
956     avfilter_inout_free(&inputs);
957
958     if (!init || simple) {
959         /* we already know the mappings between lavfi outputs and output streams,
960          * so we can finish the setup */
961         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
962             configure_output_filter(fg, fg->outputs[i], cur);
963         avfilter_inout_free(&outputs);
964
965         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
966             return ret;
967     } else {
968         /* wait until output mappings are processed */
969         for (cur = outputs; cur;) {
970             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
971                                      &fg->nb_outputs, fg->nb_outputs + 1);
972             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
973                 exit_program(1);
974             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
975             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
976             cur = cur->next;
977             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
978         }
979     }
980
981     return 0;
982 }
983
984 static int configure_complex_filters(void)
985 {
986     int i, ret = 0;
987
988     for (i = 0; i < nb_filtergraphs; i++)
989         if (!filtergraphs[i]->graph &&
990             (ret = configure_filtergraph(filtergraphs[i])) < 0)
991             return ret;
992     return 0;
993 }
994
995 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
996 {
997     int i;
998     for (i = 0; i < fg->nb_inputs; i++)
999         if (fg->inputs[i]->ist == ist)
1000             return 1;
1001     return 0;
1002 }
1003
1004 static void term_exit(void)
1005 {
1006     av_log(NULL, AV_LOG_QUIET, "");
1007 }
1008
1009 static volatile int received_sigterm = 0;
1010 static volatile int received_nb_signals = 0;
1011
1012 static void
1013 sigterm_handler(int sig)
1014 {
1015     received_sigterm = sig;
1016     received_nb_signals++;
1017     term_exit();
1018 }
1019
1020 static void term_init(void)
1021 {
1022     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1023     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1024 #ifdef SIGXCPU
1025     signal(SIGXCPU, sigterm_handler);
1026 #endif
1027 }
1028
1029 static int decode_interrupt_cb(void *ctx)
1030 {
1031     return received_nb_signals > 1;
1032 }
1033
1034 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1035
1036 void exit_program(int ret)
1037 {
1038     int i, j;
1039
1040     for (i = 0; i < nb_filtergraphs; i++) {
1041         avfilter_graph_free(&filtergraphs[i]->graph);
1042         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
1043             av_freep(&filtergraphs[i]->inputs[j]->name);
1044             av_freep(&filtergraphs[i]->inputs[j]);
1045         }
1046         av_freep(&filtergraphs[i]->inputs);
1047         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
1048             av_freep(&filtergraphs[i]->outputs[j]->name);
1049             av_freep(&filtergraphs[i]->outputs[j]);
1050         }
1051         av_freep(&filtergraphs[i]->outputs);
1052         av_freep(&filtergraphs[i]);
1053     }
1054     av_freep(&filtergraphs);
1055
1056     /* close files */
1057     for (i = 0; i < nb_output_files; i++) {
1058         AVFormatContext *s = output_files[i]->ctx;
1059         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1060             avio_close(s->pb);
1061         avformat_free_context(s);
1062         av_dict_free(&output_files[i]->opts);
1063         av_freep(&output_files[i]);
1064     }
1065     for (i = 0; i < nb_output_streams; i++) {
1066         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1067         while (bsfc) {
1068             AVBitStreamFilterContext *next = bsfc->next;
1069             av_bitstream_filter_close(bsfc);
1070             bsfc = next;
1071         }
1072         output_streams[i]->bitstream_filters = NULL;
1073
1074         av_freep(&output_streams[i]->avfilter);
1075         av_freep(&output_streams[i]->filtered_frame);
1076         av_freep(&output_streams[i]);
1077     }
1078     for (i = 0; i < nb_input_files; i++) {
1079         avformat_close_input(&input_files[i]->ctx);
1080         av_freep(&input_files[i]);
1081     }
1082     for (i = 0; i < nb_input_streams; i++) {
1083         av_freep(&input_streams[i]->decoded_frame);
1084         av_dict_free(&input_streams[i]->opts);
1085         free_buffer_pool(&input_streams[i]->buffer_pool);
1086         av_freep(&input_streams[i]->filters);
1087         av_freep(&input_streams[i]);
1088     }
1089
1090     if (vstats_file)
1091         fclose(vstats_file);
1092     av_free(vstats_filename);
1093
1094     av_freep(&input_streams);
1095     av_freep(&input_files);
1096     av_freep(&output_streams);
1097     av_freep(&output_files);
1098
1099     uninit_opts();
1100
1101     avfilter_uninit();
1102     avformat_network_deinit();
1103
1104     if (received_sigterm) {
1105         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1106                (int) received_sigterm);
1107         exit (255);
1108     }
1109
1110     exit(ret);
1111 }
1112
1113 static void assert_avoptions(AVDictionary *m)
1114 {
1115     AVDictionaryEntry *t;
1116     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1117         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1118         exit_program(1);
1119     }
1120 }
1121
1122 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1123 {
1124     const char *codec_string = encoder ? "encoder" : "decoder";
1125     AVCodec *codec;
1126     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1127         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1128         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1129                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1130                 codec_string, c->codec->name);
1131         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1132         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1133             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1134                    codec_string, codec->name);
1135         exit_program(1);
1136     }
1137 }
1138
1139 /**
1140  * Update the requested input sample format based on the output sample format.
1141  * This is currently only used to request float output from decoders which
1142  * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
1143  * Ideally this will be removed in the future when decoders do not do format
1144  * conversion and only output in their native format.
1145  */
1146 static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
1147                               AVCodecContext *enc)
1148 {
1149     /* if sample formats match or a decoder sample format has already been
1150        requested, just return */
1151     if (enc->sample_fmt == dec->sample_fmt ||
1152         dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
1153         return;
1154
1155     /* if decoder supports more than one output format */
1156     if (dec_codec && dec_codec->sample_fmts &&
1157         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
1158         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
1159         const enum AVSampleFormat *p;
1160         int min_dec = -1, min_inc = -1;
1161
1162         /* find a matching sample format in the encoder */
1163         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
1164             if (*p == enc->sample_fmt) {
1165                 dec->request_sample_fmt = *p;
1166                 return;
1167             } else if (*p > enc->sample_fmt) {
1168                 min_inc = FFMIN(min_inc, *p - enc->sample_fmt);
1169             } else
1170                 min_dec = FFMIN(min_dec, enc->sample_fmt - *p);
1171         }
1172
1173         /* if none match, provide the one that matches quality closest */
1174         dec->request_sample_fmt = min_inc > 0 ? enc->sample_fmt + min_inc :
1175                                   enc->sample_fmt - min_dec;
1176     }
1177 }
1178
1179 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1180 {
1181     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1182     AVCodecContext          *avctx = ost->st->codec;
1183     int ret;
1184
1185     /*
1186      * Audio encoders may split the packets --  #frames in != #packets out.
1187      * But there is no reordering, so we can limit the number of output packets
1188      * by simply dropping them here.
1189      * Counting encoded video frames needs to be done separately because of
1190      * reordering, see do_video_out()
1191      */
1192     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1193         if (ost->frame_number >= ost->max_frames) {
1194             av_free_packet(pkt);
1195             return;
1196         }
1197         ost->frame_number++;
1198     }
1199
1200     while (bsfc) {
1201         AVPacket new_pkt = *pkt;
1202         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1203                                            &new_pkt.data, &new_pkt.size,
1204                                            pkt->data, pkt->size,
1205                                            pkt->flags & AV_PKT_FLAG_KEY);
1206         if (a > 0) {
1207             av_free_packet(pkt);
1208             new_pkt.destruct = av_destruct_packet;
1209         } else if (a < 0) {
1210             av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
1211                    bsfc->filter->name, pkt->stream_index,
1212                    avctx->codec ? avctx->codec->name : "copy");
1213             print_error("", a);
1214             if (exit_on_error)
1215                 exit_program(1);
1216         }
1217         *pkt = new_pkt;
1218
1219         bsfc = bsfc->next;
1220     }
1221
1222     pkt->stream_index = ost->index;
1223     ret = av_interleaved_write_frame(s, pkt);
1224     if (ret < 0) {
1225         print_error("av_interleaved_write_frame()", ret);
1226         exit_program(1);
1227     }
1228 }
1229
1230 static int check_recording_time(OutputStream *ost)
1231 {
1232     OutputFile *of = output_files[ost->file_index];
1233
1234     if (of->recording_time != INT64_MAX &&
1235         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
1236                       AV_TIME_BASE_Q) >= 0) {
1237         ost->is_past_recording_time = 1;
1238         return 0;
1239     }
1240     return 1;
1241 }
1242
1243 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1244                          AVFrame *frame)
1245 {
1246     AVCodecContext *enc = ost->st->codec;
1247     AVPacket pkt;
1248     int got_packet = 0;
1249
1250     av_init_packet(&pkt);
1251     pkt.data = NULL;
1252     pkt.size = 0;
1253
1254     if (!check_recording_time(ost))
1255         return;
1256
1257     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
1258         frame->pts = ost->sync_opts;
1259     ost->sync_opts = frame->pts + frame->nb_samples;
1260
1261     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1262         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
1263         exit_program(1);
1264     }
1265
1266     if (got_packet) {
1267         if (pkt.pts != AV_NOPTS_VALUE)
1268             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1269         if (pkt.dts != AV_NOPTS_VALUE)
1270             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1271         if (pkt.duration > 0)
1272             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1273
1274         write_frame(s, &pkt, ost);
1275
1276         audio_size += pkt.size;
1277     }
1278 }
1279
1280 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1281 {
1282     AVCodecContext *dec;
1283     AVPicture *picture2;
1284     AVPicture picture_tmp;
1285     uint8_t *buf = 0;
1286
1287     dec = ist->st->codec;
1288
1289     /* deinterlace : must be done before any resize */
1290     if (do_deinterlace) {
1291         int size;
1292
1293         /* create temporary picture */
1294         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1295         buf  = av_malloc(size);
1296         if (!buf)
1297             return;
1298
1299         picture2 = &picture_tmp;
1300         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1301
1302         if (avpicture_deinterlace(picture2, picture,
1303                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1304             /* if error, do not deinterlace */
1305             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1306             av_free(buf);
1307             buf = NULL;
1308             picture2 = picture;
1309         }
1310     } else {
1311         picture2 = picture;
1312     }
1313
1314     if (picture != picture2)
1315         *picture = *picture2;
1316     *bufp = buf;
1317 }
1318
1319 static void do_subtitle_out(AVFormatContext *s,
1320                             OutputStream *ost,
1321                             InputStream *ist,
1322                             AVSubtitle *sub,
1323                             int64_t pts)
1324 {
1325     static uint8_t *subtitle_out = NULL;
1326     int subtitle_out_max_size = 1024 * 1024;
1327     int subtitle_out_size, nb, i;
1328     AVCodecContext *enc;
1329     AVPacket pkt;
1330
1331     if (pts == AV_NOPTS_VALUE) {
1332         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1333         if (exit_on_error)
1334             exit_program(1);
1335         return;
1336     }
1337
1338     enc = ost->st->codec;
1339
1340     if (!subtitle_out) {
1341         subtitle_out = av_malloc(subtitle_out_max_size);
1342     }
1343
1344     /* Note: DVB subtitle need one packet to draw them and one other
1345        packet to clear them */
1346     /* XXX: signal it in the codec context ? */
1347     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1348         nb = 2;
1349     else
1350         nb = 1;
1351
1352     for (i = 0; i < nb; i++) {
1353         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1354         if (!check_recording_time(ost))
1355             return;
1356
1357         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1358         // start_display_time is required to be 0
1359         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1360         sub->end_display_time  -= sub->start_display_time;
1361         sub->start_display_time = 0;
1362         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1363                                                     subtitle_out_max_size, sub);
1364         if (subtitle_out_size < 0) {
1365             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1366             exit_program(1);
1367         }
1368
1369         av_init_packet(&pkt);
1370         pkt.data = subtitle_out;
1371         pkt.size = subtitle_out_size;
1372         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1373         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1374             /* XXX: the pts correction is handled here. Maybe handling
1375                it in the codec would be better */
1376             if (i == 0)
1377                 pkt.pts += 90 * sub->start_display_time;
1378             else
1379                 pkt.pts += 90 * sub->end_display_time;
1380         }
1381         write_frame(s, &pkt, ost);
1382     }
1383 }
1384
1385 static void do_video_out(AVFormatContext *s,
1386                          OutputStream *ost,
1387                          AVFrame *in_picture,
1388                          int *frame_size, float quality)
1389 {
1390     int ret, format_video_sync;
1391     AVPacket pkt;
1392     AVCodecContext *enc = ost->st->codec;
1393
1394     *frame_size = 0;
1395
1396     format_video_sync = video_sync_method;
1397     if (format_video_sync == VSYNC_AUTO)
1398         format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
1399                             (s->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
1400     if (format_video_sync != VSYNC_PASSTHROUGH &&
1401         ost->frame_number &&
1402         in_picture->pts != AV_NOPTS_VALUE &&
1403         in_picture->pts < ost->sync_opts) {
1404         nb_frames_drop++;
1405         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1406         return;
1407     }
1408
1409     if (in_picture->pts == AV_NOPTS_VALUE)
1410         in_picture->pts = ost->sync_opts;
1411     ost->sync_opts = in_picture->pts;
1412
1413
1414     if (!ost->frame_number)
1415         ost->first_pts = in_picture->pts;
1416
1417     av_init_packet(&pkt);
1418     pkt.data = NULL;
1419     pkt.size = 0;
1420
1421     if (!check_recording_time(ost) ||
1422         ost->frame_number >= ost->max_frames)
1423         return;
1424
1425     if (s->oformat->flags & AVFMT_RAWPICTURE &&
1426         enc->codec->id == CODEC_ID_RAWVIDEO) {
1427         /* raw pictures are written as AVPicture structure to
1428            avoid any copies. We support temporarily the older
1429            method. */
1430         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1431         enc->coded_frame->top_field_first  = in_picture->top_field_first;
1432         pkt.data   = (uint8_t *)in_picture;
1433         pkt.size   =  sizeof(AVPicture);
1434         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
1435         pkt.flags |= AV_PKT_FLAG_KEY;
1436
1437         write_frame(s, &pkt, ost);
1438     } else {
1439         int got_packet;
1440         AVFrame big_picture;
1441
1442         big_picture = *in_picture;
1443         /* better than nothing: use input picture interlaced
1444            settings */
1445         big_picture.interlaced_frame = in_picture->interlaced_frame;
1446         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1447             if (ost->top_field_first == -1)
1448                 big_picture.top_field_first = in_picture->top_field_first;
1449             else
1450                 big_picture.top_field_first = !!ost->top_field_first;
1451         }
1452
1453         /* handles same_quant here. This is not correct because it may
1454            not be a global option */
1455         big_picture.quality = quality;
1456         if (!enc->me_threshold)
1457             big_picture.pict_type = 0;
1458         if (ost->forced_kf_index < ost->forced_kf_count &&
1459             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1460             big_picture.pict_type = AV_PICTURE_TYPE_I;
1461             ost->forced_kf_index++;
1462         }
1463         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
1464         if (ret < 0) {
1465             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1466             exit_program(1);
1467         }
1468
1469         if (got_packet) {
1470             if (pkt.pts != AV_NOPTS_VALUE)
1471                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1472             if (pkt.dts != AV_NOPTS_VALUE)
1473                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1474
1475             write_frame(s, &pkt, ost);
1476             *frame_size = pkt.size;
1477             video_size += pkt.size;
1478
1479             /* if two pass, output log */
1480             if (ost->logfile && enc->stats_out) {
1481                 fprintf(ost->logfile, "%s", enc->stats_out);
1482             }
1483         }
1484     }
1485     ost->sync_opts++;
1486     /*
1487      * For video, number of frames in == number of packets out.
1488      * But there may be reordering, so we can't throw away frames on encoder
1489      * flush, we need to limit them here, before they go into encoder.
1490      */
1491     ost->frame_number++;
1492 }
1493
1494 static double psnr(double d)
1495 {
1496     return -10.0 * log(d) / log(10.0);
1497 }
1498
1499 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1500                            int frame_size)
1501 {
1502     AVCodecContext *enc;
1503     int frame_number;
1504     double ti1, bitrate, avg_bitrate;
1505
1506     /* this is executed just the first time do_video_stats is called */
1507     if (!vstats_file) {
1508         vstats_file = fopen(vstats_filename, "w");
1509         if (!vstats_file) {
1510             perror("fopen");
1511             exit_program(1);
1512         }
1513     }
1514
1515     enc = ost->st->codec;
1516     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1517         frame_number = ost->frame_number;
1518         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1519         if (enc->flags&CODEC_FLAG_PSNR)
1520             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1521
1522         fprintf(vstats_file,"f_size= %6d ", frame_size);
1523         /* compute pts value */
1524         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1525         if (ti1 < 0.01)
1526             ti1 = 0.01;
1527
1528         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1529         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1530         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1531                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1532         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1533     }
1534 }
1535
1536 /* check for new output on any of the filtergraphs */
1537 static int poll_filters(void)
1538 {
1539     AVFilterBufferRef *picref;
1540     AVFrame *filtered_frame = NULL;
1541     int i, frame_size;
1542
1543     for (i = 0; i < nb_output_streams; i++) {
1544         OutputStream *ost = output_streams[i];
1545         OutputFile    *of = output_files[ost->file_index];
1546         int ret = 0;
1547
1548         if (!ost->filter)
1549             continue;
1550
1551         if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
1552             return AVERROR(ENOMEM);
1553         } else
1554             avcodec_get_frame_defaults(ost->filtered_frame);
1555         filtered_frame = ost->filtered_frame;
1556
1557         while (ret >= 0 && !ost->is_past_recording_time) {
1558             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1559                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1560                 ret = av_buffersink_read_samples(ost->filter->filter, &picref,
1561                                                  ost->st->codec->frame_size);
1562             else
1563                 ret = av_buffersink_read(ost->filter->filter, &picref);
1564
1565             if (ret < 0)
1566                 break;
1567
1568             avfilter_copy_buf_props(filtered_frame, picref);
1569             if (picref->pts != AV_NOPTS_VALUE)
1570                 filtered_frame->pts = av_rescale_q(picref->pts,
1571                                                    ost->filter->filter->inputs[0]->time_base,
1572                                                    ost->st->codec->time_base) -
1573                                       av_rescale_q(of->start_time,
1574                                                    AV_TIME_BASE_Q,
1575                                                    ost->st->codec->time_base);
1576
1577             if (of->start_time && filtered_frame->pts < of->start_time) {
1578                 avfilter_unref_buffer(picref);
1579                 continue;
1580             }
1581
1582             switch (ost->filter->filter->inputs[0]->type) {
1583             case AVMEDIA_TYPE_VIDEO:
1584                 if (!ost->frame_aspect_ratio)
1585                     ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
1586
1587                 do_video_out(of->ctx, ost, filtered_frame, &frame_size,
1588                              same_quant ? ost->last_quality :
1589                                           ost->st->codec->global_quality);
1590                 if (vstats_filename && frame_size)
1591                     do_video_stats(of->ctx, ost, frame_size);
1592                 break;
1593             case AVMEDIA_TYPE_AUDIO:
1594                 do_audio_out(of->ctx, ost, filtered_frame);
1595                 break;
1596             default:
1597                 // TODO support subtitle filters
1598                 av_assert0(0);
1599             }
1600
1601             avfilter_unref_buffer(picref);
1602         }
1603     }
1604     return 0;
1605 }
1606
1607 static void print_report(int is_last_report, int64_t timer_start)
1608 {
1609     char buf[1024];
1610     OutputStream *ost;
1611     AVFormatContext *oc;
1612     int64_t total_size;
1613     AVCodecContext *enc;
1614     int frame_number, vid, i;
1615     double bitrate, ti1, pts;
1616     static int64_t last_time = -1;
1617     static int qp_histogram[52];
1618
1619     if (!print_stats && !is_last_report)
1620         return;
1621
1622     if (!is_last_report) {
1623         int64_t cur_time;
1624         /* display the report every 0.5 seconds */
1625         cur_time = av_gettime();
1626         if (last_time == -1) {
1627             last_time = cur_time;
1628             return;
1629         }
1630         if ((cur_time - last_time) < 500000)
1631             return;
1632         last_time = cur_time;
1633     }
1634
1635
1636     oc = output_files[0]->ctx;
1637
1638     total_size = avio_size(oc->pb);
1639     if (total_size < 0) // FIXME improve avio_size() so it works with non seekable output too
1640         total_size = avio_tell(oc->pb);
1641
1642     buf[0] = '\0';
1643     ti1 = 1e10;
1644     vid = 0;
1645     for (i = 0; i < nb_output_streams; i++) {
1646         float q = -1;
1647         ost = output_streams[i];
1648         enc = ost->st->codec;
1649         if (!ost->stream_copy && enc->coded_frame)
1650             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1651         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1652             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1653         }
1654         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1655             float t = (av_gettime() - timer_start) / 1000000.0;
1656
1657             frame_number = ost->frame_number;
1658             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
1659                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
1660             if (is_last_report)
1661                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1662             if (qp_hist) {
1663                 int j;
1664                 int qp = lrintf(q);
1665                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1666                     qp_histogram[qp]++;
1667                 for (j = 0; j < 32; j++)
1668                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
1669             }
1670             if (enc->flags&CODEC_FLAG_PSNR) {
1671                 int j;
1672                 double error, error_sum = 0;
1673                 double scale, scale_sum = 0;
1674                 char type[3] = { 'Y','U','V' };
1675                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1676                 for (j = 0; j < 3; j++) {
1677                     if (is_last_report) {
1678                         error = enc->error[j];
1679                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1680                     } else {
1681                         error = enc->coded_frame->error[j];
1682                         scale = enc->width * enc->height * 255.0 * 255.0;
1683                     }
1684                     if (j)
1685                         scale /= 4;
1686                     error_sum += error;
1687                     scale_sum += scale;
1688                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
1689                 }
1690                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1691             }
1692             vid = 1;
1693         }
1694         /* compute min output value */
1695         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
1696         if ((pts < ti1) && (pts > 0))
1697             ti1 = pts;
1698     }
1699     if (ti1 < 0.01)
1700         ti1 = 0.01;
1701
1702     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
1703
1704     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1705             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
1706             (double)total_size / 1024, ti1, bitrate);
1707
1708     if (nb_frames_dup || nb_frames_drop)
1709         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1710                 nb_frames_dup, nb_frames_drop);
1711
1712     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1713
1714     fflush(stderr);
1715
1716     if (is_last_report) {
1717         int64_t raw= audio_size + video_size + extra_size;
1718         av_log(NULL, AV_LOG_INFO, "\n");
1719         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
1720                video_size / 1024.0,
1721                audio_size / 1024.0,
1722                extra_size / 1024.0,
1723                100.0 * (total_size - raw) / raw
1724         );
1725     }
1726 }
1727
1728 static void flush_encoders(void)
1729 {
1730     int i, ret;
1731
1732     for (i = 0; i < nb_output_streams; i++) {
1733         OutputStream   *ost = output_streams[i];
1734         AVCodecContext *enc = ost->st->codec;
1735         AVFormatContext *os = output_files[ost->file_index]->ctx;
1736         int stop_encoding = 0;
1737
1738         if (!ost->encoding_needed)
1739             continue;
1740
1741         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1742             continue;
1743         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
1744             continue;
1745
1746         for (;;) {
1747             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1748             const char *desc;
1749             int64_t *size;
1750
1751             switch (ost->st->codec->codec_type) {
1752             case AVMEDIA_TYPE_AUDIO:
1753                 encode = avcodec_encode_audio2;
1754                 desc   = "Audio";
1755                 size   = &audio_size;
1756                 break;
1757             case AVMEDIA_TYPE_VIDEO:
1758                 encode = avcodec_encode_video2;
1759                 desc   = "Video";
1760                 size   = &video_size;
1761                 break;
1762             default:
1763                 stop_encoding = 1;
1764             }
1765
1766             if (encode) {
1767                 AVPacket pkt;
1768                 int got_packet;
1769                 av_init_packet(&pkt);
1770                 pkt.data = NULL;
1771                 pkt.size = 0;
1772
1773                 ret = encode(enc, &pkt, NULL, &got_packet);
1774                 if (ret < 0) {
1775                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1776                     exit_program(1);
1777                 }
1778                 *size += ret;
1779                 if (ost->logfile && enc->stats_out) {
1780                     fprintf(ost->logfile, "%s", enc->stats_out);
1781                 }
1782                 if (!got_packet) {
1783                     stop_encoding = 1;
1784                     break;
1785                 }
1786                 if (pkt.pts != AV_NOPTS_VALUE)
1787                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1788                 if (pkt.dts != AV_NOPTS_VALUE)
1789                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1790                 write_frame(os, &pkt, ost);
1791             }
1792
1793             if (stop_encoding)
1794                 break;
1795         }
1796     }
1797 }
1798
1799 /*
1800  * Check whether a packet from ist should be written into ost at this time
1801  */
1802 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1803 {
1804     OutputFile *of = output_files[ost->file_index];
1805     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1806
1807     if (ost->source_index != ist_index)
1808         return 0;
1809
1810     if (of->start_time && ist->last_dts < of->start_time)
1811         return 0;
1812
1813     return 1;
1814 }
1815
1816 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1817 {
1818     OutputFile *of = output_files[ost->file_index];
1819     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
1820     AVPacket opkt;
1821
1822     av_init_packet(&opkt);
1823
1824     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1825         !ost->copy_initial_nonkeyframes)
1826         return;
1827
1828     if (of->recording_time != INT64_MAX &&
1829         ist->last_dts >= of->recording_time + of->start_time) {
1830         ost->is_past_recording_time = 1;
1831         return;
1832     }
1833
1834     /* force the input stream PTS */
1835     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1836         audio_size += pkt->size;
1837     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1838         video_size += pkt->size;
1839         ost->sync_opts++;
1840     }
1841
1842     if (pkt->pts != AV_NOPTS_VALUE)
1843         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1844     else
1845         opkt.pts = AV_NOPTS_VALUE;
1846
1847     if (pkt->dts == AV_NOPTS_VALUE)
1848         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
1849     else
1850         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1851     opkt.dts -= ost_tb_start_time;
1852
1853     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1854     opkt.flags    = pkt->flags;
1855
1856     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1857     if (  ost->st->codec->codec_id != CODEC_ID_H264
1858        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
1859        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
1860        && ost->st->codec->codec_id != CODEC_ID_VC1
1861        ) {
1862         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1863             opkt.destruct = av_destruct_packet;
1864     } else {
1865         opkt.data = pkt->data;
1866         opkt.size = pkt->size;
1867     }
1868
1869     write_frame(of->ctx, &opkt, ost);
1870     ost->st->codec->frame_number++;
1871     av_free_packet(&opkt);
1872 }
1873
1874 static void rate_emu_sleep(InputStream *ist)
1875 {
1876     if (input_files[ist->file_index]->rate_emu) {
1877         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
1878         int64_t now = av_gettime() - ist->start;
1879         if (pts > now)
1880             usleep(pts - now);
1881     }
1882 }
1883
1884 static int guess_input_channel_layout(InputStream *ist)
1885 {
1886     AVCodecContext *dec = ist->st->codec;
1887
1888     if (!dec->channel_layout) {
1889         char layout_name[256];
1890
1891         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1892         if (!dec->channel_layout)
1893             return 0;
1894         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1895                                      dec->channels, dec->channel_layout);
1896         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1897                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1898     }
1899     return 1;
1900 }
1901
1902 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1903 {
1904     AVFrame *decoded_frame;
1905     AVCodecContext *avctx = ist->st->codec;
1906     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
1907     int i, ret, resample_changed;
1908
1909     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1910         return AVERROR(ENOMEM);
1911     else
1912         avcodec_get_frame_defaults(ist->decoded_frame);
1913     decoded_frame = ist->decoded_frame;
1914
1915     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1916     if (ret < 0) {
1917         return ret;
1918     }
1919
1920     if (!*got_output) {
1921         /* no audio frame */
1922         if (!pkt->size)
1923             for (i = 0; i < ist->nb_filters; i++)
1924                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1925         return ret;
1926     }
1927
1928     /* if the decoder provides a pts, use it instead of the last packet pts.
1929        the decoder could be delaying output by a packet or more. */
1930     if (decoded_frame->pts != AV_NOPTS_VALUE)
1931         ist->next_dts = decoded_frame->pts;
1932     else if (pkt->pts != AV_NOPTS_VALUE) {
1933         decoded_frame->pts = pkt->pts;
1934         pkt->pts           = AV_NOPTS_VALUE;
1935     }
1936
1937     // preprocess audio (volume)
1938     if (audio_volume != 256) {
1939         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
1940         void *samples = decoded_frame->data[0];
1941         switch (avctx->sample_fmt) {
1942         case AV_SAMPLE_FMT_U8:
1943         {
1944             uint8_t *volp = samples;
1945             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1946                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
1947                 *volp++ = av_clip_uint8(v);
1948             }
1949             break;
1950         }
1951         case AV_SAMPLE_FMT_S16:
1952         {
1953             int16_t *volp = samples;
1954             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1955                 int v = ((*volp) * audio_volume + 128) >> 8;
1956                 *volp++ = av_clip_int16(v);
1957             }
1958             break;
1959         }
1960         case AV_SAMPLE_FMT_S32:
1961         {
1962             int32_t *volp = samples;
1963             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1964                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
1965                 *volp++ = av_clipl_int32(v);
1966             }
1967             break;
1968         }
1969         case AV_SAMPLE_FMT_FLT:
1970         {
1971             float *volp = samples;
1972             float scale = audio_volume / 256.f;
1973             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1974                 *volp++ *= scale;
1975             }
1976             break;
1977         }
1978         case AV_SAMPLE_FMT_DBL:
1979         {
1980             double *volp = samples;
1981             double scale = audio_volume / 256.;
1982             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1983                 *volp++ *= scale;
1984             }
1985             break;
1986         }
1987         default:
1988             av_log(NULL, AV_LOG_FATAL,
1989                    "Audio volume adjustment on sample format %s is not supported.\n",
1990                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
1991             exit_program(1);
1992         }
1993     }
1994
1995     rate_emu_sleep(ist);
1996
1997     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1998                        ist->resample_channels       != avctx->channels               ||
1999                        ist->resample_channel_layout != decoded_frame->channel_layout ||
2000                        ist->resample_sample_rate    != decoded_frame->sample_rate;
2001     if (resample_changed) {
2002         char layout1[64], layout2[64];
2003
2004         if (!guess_input_channel_layout(ist)) {
2005             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
2006                    "layout for Input Stream #%d.%d\n", ist->file_index,
2007                    ist->st->index);
2008             exit_program(1);
2009         }
2010         decoded_frame->channel_layout = avctx->channel_layout;
2011
2012         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
2013                                      ist->resample_channel_layout);
2014         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
2015                                      decoded_frame->channel_layout);
2016
2017         av_log(NULL, AV_LOG_INFO,
2018                "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",
2019                ist->file_index, ist->st->index,
2020                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2021                ist->resample_channels, layout1,
2022                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2023                avctx->channels, layout2);
2024
2025         ist->resample_sample_fmt     = decoded_frame->format;
2026         ist->resample_sample_rate    = decoded_frame->sample_rate;
2027         ist->resample_channel_layout = decoded_frame->channel_layout;
2028         ist->resample_channels       = avctx->channels;
2029
2030         for (i = 0; i < nb_filtergraphs; i++)
2031             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2032                 configure_filtergraph(filtergraphs[i]) < 0) {
2033                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2034                 exit_program(1);
2035             }
2036     }
2037
2038     for (i = 0; i < ist->nb_filters; i++)
2039         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
2040
2041     return ret;
2042 }
2043
2044 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
2045 {
2046     AVFrame *decoded_frame;
2047     void *buffer_to_free = NULL;
2048     int i, ret = 0, resample_changed;
2049     float quality;
2050
2051     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2052         return AVERROR(ENOMEM);
2053     else
2054         avcodec_get_frame_defaults(ist->decoded_frame);
2055     decoded_frame = ist->decoded_frame;
2056
2057     ret = avcodec_decode_video2(ist->st->codec,
2058                                 decoded_frame, got_output, pkt);
2059     if (ret < 0)
2060         return ret;
2061
2062     quality = same_quant ? decoded_frame->quality : 0;
2063     if (!*got_output) {
2064         /* no picture yet */
2065         if (!pkt->size)
2066             for (i = 0; i < ist->nb_filters; i++)
2067                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
2068         return ret;
2069     }
2070     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
2071                                            decoded_frame->pkt_dts);
2072     pkt->size = 0;
2073     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2074
2075     rate_emu_sleep(ist);
2076
2077     if (ist->st->sample_aspect_ratio.num)
2078         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2079
2080     resample_changed = ist->resample_width   != decoded_frame->width  ||
2081                        ist->resample_height  != decoded_frame->height ||
2082                        ist->resample_pix_fmt != decoded_frame->format;
2083     if (resample_changed) {
2084         av_log(NULL, AV_LOG_INFO,
2085                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2086                ist->file_index, ist->st->index,
2087                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2088                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2089
2090         ist->resample_width   = decoded_frame->width;
2091         ist->resample_height  = decoded_frame->height;
2092         ist->resample_pix_fmt = decoded_frame->format;
2093
2094         for (i = 0; i < nb_filtergraphs; i++)
2095             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2096                 configure_filtergraph(filtergraphs[i]) < 0) {
2097                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2098                 exit_program(1);
2099             }
2100     }
2101
2102     for (i = 0; i < ist->nb_filters; i++) {
2103         // XXX what an ugly hack
2104         if (ist->filters[i]->graph->nb_outputs == 1)
2105             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2106
2107         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
2108             FrameBuffer      *buf = decoded_frame->opaque;
2109             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2110                                         decoded_frame->data, decoded_frame->linesize,
2111                                         AV_PERM_READ | AV_PERM_PRESERVE,
2112                                         ist->st->codec->width, ist->st->codec->height,
2113                                         ist->st->codec->pix_fmt);
2114
2115             avfilter_copy_frame_props(fb, decoded_frame);
2116             fb->buf->priv           = buf;
2117             fb->buf->free           = filter_release_buffer;
2118
2119             buf->refcount++;
2120             av_buffersrc_buffer(ist->filters[i]->filter, fb);
2121         } else
2122             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
2123     }
2124
2125     av_free(buffer_to_free);
2126     return ret;
2127 }
2128
2129 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2130 {
2131     AVSubtitle subtitle;
2132     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2133                                           &subtitle, got_output, pkt);
2134     if (ret < 0)
2135         return ret;
2136     if (!*got_output)
2137         return ret;
2138
2139     rate_emu_sleep(ist);
2140
2141     for (i = 0; i < nb_output_streams; i++) {
2142         OutputStream *ost = output_streams[i];
2143
2144         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2145             continue;
2146
2147         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2148     }
2149
2150     avsubtitle_free(&subtitle);
2151     return ret;
2152 }
2153
2154 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2155 static int output_packet(InputStream *ist, const AVPacket *pkt)
2156 {
2157     int i;
2158     int got_output;
2159     AVPacket avpkt;
2160
2161     if (ist->next_dts == AV_NOPTS_VALUE)
2162         ist->next_dts = ist->last_dts;
2163
2164     if (pkt == NULL) {
2165         /* EOF handling */
2166         av_init_packet(&avpkt);
2167         avpkt.data = NULL;
2168         avpkt.size = 0;
2169         goto handle_eof;
2170     } else {
2171         avpkt = *pkt;
2172     }
2173
2174     if (pkt->dts != AV_NOPTS_VALUE)
2175         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2176
2177     // while we have more to decode or while the decoder did output something on EOF
2178     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2179         int ret = 0;
2180     handle_eof:
2181
2182         ist->last_dts = ist->next_dts;
2183
2184         if (avpkt.size && avpkt.size != pkt->size) {
2185             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2186                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2187             ist->showed_multi_packet_warning = 1;
2188         }
2189
2190         switch (ist->st->codec->codec_type) {
2191         case AVMEDIA_TYPE_AUDIO:
2192             ret = decode_audio    (ist, &avpkt, &got_output);
2193             break;
2194         case AVMEDIA_TYPE_VIDEO:
2195             ret = decode_video    (ist, &avpkt, &got_output);
2196             if (avpkt.duration)
2197                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2198             else if (ist->st->r_frame_rate.num)
2199                 ist->next_dts += av_rescale_q(1, (AVRational){ist->st->r_frame_rate.den,
2200                                                               ist->st->r_frame_rate.num},
2201                                               AV_TIME_BASE_Q);
2202             else if (ist->st->codec->time_base.num != 0) {
2203                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
2204                                                    ist->st->codec->ticks_per_frame;
2205                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
2206             }
2207             break;
2208         case AVMEDIA_TYPE_SUBTITLE:
2209             ret = transcode_subtitles(ist, &avpkt, &got_output);
2210             break;
2211         default:
2212             return -1;
2213         }
2214
2215         if (ret < 0)
2216             return ret;
2217         // touch data and size only if not EOF
2218         if (pkt) {
2219             avpkt.data += ret;
2220             avpkt.size -= ret;
2221         }
2222         if (!got_output) {
2223             continue;
2224         }
2225     }
2226
2227     /* handle stream copy */
2228     if (!ist->decoding_needed) {
2229         rate_emu_sleep(ist);
2230         ist->last_dts = ist->next_dts;
2231         switch (ist->st->codec->codec_type) {
2232         case AVMEDIA_TYPE_AUDIO:
2233             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2234                              ist->st->codec->sample_rate;
2235             break;
2236         case AVMEDIA_TYPE_VIDEO:
2237             if (ist->st->codec->time_base.num != 0) {
2238                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2239                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2240                                   ist->st->codec->time_base.num * ticks) /
2241                                   ist->st->codec->time_base.den;
2242             }
2243             break;
2244         }
2245     }
2246     for (i = 0; pkt && i < nb_output_streams; i++) {
2247         OutputStream *ost = output_streams[i];
2248
2249         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2250             continue;
2251
2252         do_streamcopy(ist, ost, pkt);
2253     }
2254
2255     return 0;
2256 }
2257
2258 static void print_sdp(void)
2259 {
2260     char sdp[2048];
2261     int i;
2262     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2263
2264     if (!avc)
2265         exit_program(1);
2266     for (i = 0; i < nb_output_files; i++)
2267         avc[i] = output_files[i]->ctx;
2268
2269     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2270     printf("SDP:\n%s\n", sdp);
2271     fflush(stdout);
2272     av_freep(&avc);
2273 }
2274
2275 static int init_input_stream(int ist_index, char *error, int error_len)
2276 {
2277     int i;
2278     InputStream *ist = input_streams[ist_index];
2279     if (ist->decoding_needed) {
2280         AVCodec *codec = ist->dec;
2281         if (!codec) {
2282             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
2283                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
2284             return AVERROR(EINVAL);
2285         }
2286
2287         /* update requested sample format for the decoder based on the
2288            corresponding encoder sample format */
2289         for (i = 0; i < nb_output_streams; i++) {
2290             OutputStream *ost = output_streams[i];
2291             if (ost->source_index == ist_index) {
2292                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
2293                 break;
2294             }
2295         }
2296
2297         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
2298             ist->st->codec->get_buffer     = codec_get_buffer;
2299             ist->st->codec->release_buffer = codec_release_buffer;
2300             ist->st->codec->opaque         = &ist->buffer_pool;
2301         }
2302
2303         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2304             av_dict_set(&ist->opts, "threads", "auto", 0);
2305         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2306             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2307                     ist->file_index, ist->st->index);
2308             return AVERROR(EINVAL);
2309         }
2310         assert_codec_experimental(ist->st->codec, 0);
2311         assert_avoptions(ist->opts);
2312     }
2313
2314     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;
2315     ist->next_dts = AV_NOPTS_VALUE;
2316     init_pts_correction(&ist->pts_ctx);
2317     ist->is_start = 1;
2318
2319     return 0;
2320 }
2321
2322 static InputStream *get_input_stream(OutputStream *ost)
2323 {
2324     if (ost->source_index >= 0)
2325         return input_streams[ost->source_index];
2326
2327     if (ost->filter) {
2328         FilterGraph *fg = ost->filter->graph;
2329         int i;
2330
2331         for (i = 0; i < fg->nb_inputs; i++)
2332             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
2333                 return fg->inputs[i]->ist;
2334     }
2335
2336     return NULL;
2337 }
2338
2339 static int transcode_init(void)
2340 {
2341     int ret = 0, i, j, k;
2342     AVFormatContext *oc;
2343     AVCodecContext *codec, *icodec;
2344     OutputStream *ost;
2345     InputStream *ist;
2346     char error[1024];
2347     int want_sdp = 1;
2348
2349     /* init framerate emulation */
2350     for (i = 0; i < nb_input_files; i++) {
2351         InputFile *ifile = input_files[i];
2352         if (ifile->rate_emu)
2353             for (j = 0; j < ifile->nb_streams; j++)
2354                 input_streams[j + ifile->ist_index]->start = av_gettime();
2355     }
2356
2357     /* output stream init */
2358     for (i = 0; i < nb_output_files; i++) {
2359         oc = output_files[i]->ctx;
2360         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2361             av_dump_format(oc, i, oc->filename, 1);
2362             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2363             return AVERROR(EINVAL);
2364         }
2365     }
2366
2367     /* init complex filtergraphs */
2368     for (i = 0; i < nb_filtergraphs; i++)
2369         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2370             return ret;
2371
2372     /* for each output stream, we compute the right encoding parameters */
2373     for (i = 0; i < nb_output_streams; i++) {
2374         ost = output_streams[i];
2375         oc  = output_files[ost->file_index]->ctx;
2376         ist = get_input_stream(ost);
2377
2378         if (ost->attachment_filename)
2379             continue;
2380
2381         codec  = ost->st->codec;
2382
2383         if (ist) {
2384             icodec = ist->st->codec;
2385
2386             ost->st->disposition          = ist->st->disposition;
2387             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2388             codec->chroma_sample_location = icodec->chroma_sample_location;
2389         }
2390
2391         if (ost->stream_copy) {
2392             uint64_t extra_size;
2393
2394             av_assert0(ist && !ost->filter);
2395
2396             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2397
2398             if (extra_size > INT_MAX) {
2399                 return AVERROR(EINVAL);
2400             }
2401
2402             /* if stream_copy is selected, no need to decode or encode */
2403             codec->codec_id   = icodec->codec_id;
2404             codec->codec_type = icodec->codec_type;
2405
2406             if (!codec->codec_tag) {
2407                 if (!oc->oformat->codec_tag ||
2408                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2409                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2410                     codec->codec_tag = icodec->codec_tag;
2411             }
2412
2413             codec->bit_rate       = icodec->bit_rate;
2414             codec->rc_max_rate    = icodec->rc_max_rate;
2415             codec->rc_buffer_size = icodec->rc_buffer_size;
2416             codec->field_order    = icodec->field_order;
2417             codec->extradata      = av_mallocz(extra_size);
2418             if (!codec->extradata) {
2419                 return AVERROR(ENOMEM);
2420             }
2421             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2422             codec->extradata_size = icodec->extradata_size;
2423             if (!copy_tb) {
2424                 codec->time_base      = icodec->time_base;
2425                 codec->time_base.num *= icodec->ticks_per_frame;
2426                 av_reduce(&codec->time_base.num, &codec->time_base.den,
2427                           codec->time_base.num, codec->time_base.den, INT_MAX);
2428             } else
2429                 codec->time_base = ist->st->time_base;
2430
2431             switch (codec->codec_type) {
2432             case AVMEDIA_TYPE_AUDIO:
2433                 if (audio_volume != 256) {
2434                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2435                     exit_program(1);
2436                 }
2437                 codec->channel_layout     = icodec->channel_layout;
2438                 codec->sample_rate        = icodec->sample_rate;
2439                 codec->channels           = icodec->channels;
2440                 codec->frame_size         = icodec->frame_size;
2441                 codec->audio_service_type = icodec->audio_service_type;
2442                 codec->block_align        = icodec->block_align;
2443                 break;
2444             case AVMEDIA_TYPE_VIDEO:
2445                 codec->pix_fmt            = icodec->pix_fmt;
2446                 codec->width              = icodec->width;
2447                 codec->height             = icodec->height;
2448                 codec->has_b_frames       = icodec->has_b_frames;
2449                 if (!codec->sample_aspect_ratio.num) {
2450                     codec->sample_aspect_ratio   =
2451                     ost->st->sample_aspect_ratio =
2452                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2453                         ist->st->codec->sample_aspect_ratio.num ?
2454                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2455                 }
2456                 break;
2457             case AVMEDIA_TYPE_SUBTITLE:
2458                 codec->width  = icodec->width;
2459                 codec->height = icodec->height;
2460                 break;
2461             case AVMEDIA_TYPE_DATA:
2462             case AVMEDIA_TYPE_ATTACHMENT:
2463                 break;
2464             default:
2465                 abort();
2466             }
2467         } else {
2468             if (!ost->enc) {
2469                 /* should only happen when a default codec is not present. */
2470                 snprintf(error, sizeof(error), "Automatic encoder selection "
2471                          "failed for output stream #%d:%d. Default encoder for "
2472                          "format %s is probably disabled. Please choose an "
2473                          "encoder manually.\n", ost->file_index, ost->index,
2474                          oc->oformat->name);
2475                 ret = AVERROR(EINVAL);
2476                 goto dump_format;
2477             }
2478
2479             if (ist)
2480                 ist->decoding_needed = 1;
2481             ost->encoding_needed = 1;
2482
2483             /*
2484              * We want CFR output if and only if one of those is true:
2485              * 1) user specified output framerate with -r
2486              * 2) user specified -vsync cfr
2487              * 3) output format is CFR and the user didn't force vsync to
2488              *    something else than CFR
2489              *
2490              * in such a case, set ost->frame_rate
2491              */
2492             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
2493                 !ost->frame_rate.num && ist &&
2494                 (video_sync_method ==  VSYNC_CFR ||
2495                  (video_sync_method ==  VSYNC_AUTO &&
2496                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
2497                 ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
2498                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2499                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2500                     ost->frame_rate = ost->enc->supported_framerates[idx];
2501                 }
2502             }
2503
2504             if (!ost->filter &&
2505                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2506                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2507                     FilterGraph *fg;
2508                     fg = init_simple_filtergraph(ist, ost);
2509                     if (configure_filtergraph(fg)) {
2510                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2511                         exit(1);
2512                     }
2513             }
2514
2515             switch (codec->codec_type) {
2516             case AVMEDIA_TYPE_AUDIO:
2517                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2518                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2519                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2520                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
2521                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2522                 break;
2523             case AVMEDIA_TYPE_VIDEO:
2524                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
2525
2526                 codec->width  = ost->filter->filter->inputs[0]->w;
2527                 codec->height = ost->filter->filter->inputs[0]->h;
2528                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2529                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
2530                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
2531                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2532                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2533
2534                 if (codec->width   != icodec->width  ||
2535                     codec->height  != icodec->height ||
2536                     codec->pix_fmt != icodec->pix_fmt) {
2537                     codec->bits_per_raw_sample = 0;
2538                 }
2539
2540                 break;
2541             case AVMEDIA_TYPE_SUBTITLE:
2542                 codec->time_base = (AVRational){1, 1000};
2543                 break;
2544             default:
2545                 abort();
2546                 break;
2547             }
2548             /* two pass mode */
2549             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
2550                 char logfilename[1024];
2551                 FILE *f;
2552
2553                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2554                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
2555                          i);
2556                 if (!strcmp(ost->enc->name, "libx264")) {
2557                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2558                 } else {
2559                     if (codec->flags & CODEC_FLAG_PASS1) {
2560                         f = fopen(logfilename, "wb");
2561                         if (!f) {
2562                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2563                                    logfilename, strerror(errno));
2564                             exit_program(1);
2565                         }
2566                         ost->logfile = f;
2567                     } else {
2568                         char  *logbuffer;
2569                         size_t logbuffer_size;
2570                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2571                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2572                                    logfilename);
2573                             exit_program(1);
2574                         }
2575                         codec->stats_in = logbuffer;
2576                     }
2577                 }
2578             }
2579         }
2580     }
2581
2582     /* open each encoder */
2583     for (i = 0; i < nb_output_streams; i++) {
2584         ost = output_streams[i];
2585         if (ost->encoding_needed) {
2586             AVCodec      *codec = ost->enc;
2587             AVCodecContext *dec = NULL;
2588
2589             if ((ist = get_input_stream(ost)))
2590                 dec = ist->st->codec;
2591             if (dec && dec->subtitle_header) {
2592                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
2593                 if (!ost->st->codec->subtitle_header) {
2594                     ret = AVERROR(ENOMEM);
2595                     goto dump_format;
2596                 }
2597                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2598                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2599             }
2600             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2601                 av_dict_set(&ost->opts, "threads", "auto", 0);
2602             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
2603                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2604                         ost->file_index, ost->index);
2605                 ret = AVERROR(EINVAL);
2606                 goto dump_format;
2607             }
2608             assert_codec_experimental(ost->st->codec, 1);
2609             assert_avoptions(ost->opts);
2610             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2611                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2612                                              "It takes bits/s as argument, not kbits/s\n");
2613             extra_size += ost->st->codec->extradata_size;
2614
2615             if (ost->st->codec->me_threshold)
2616                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
2617         }
2618     }
2619
2620     /* init input streams */
2621     for (i = 0; i < nb_input_streams; i++)
2622         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
2623             goto dump_format;
2624
2625     /* discard unused programs */
2626     for (i = 0; i < nb_input_files; i++) {
2627         InputFile *ifile = input_files[i];
2628         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2629             AVProgram *p = ifile->ctx->programs[j];
2630             int discard  = AVDISCARD_ALL;
2631
2632             for (k = 0; k < p->nb_stream_indexes; k++)
2633                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
2634                     discard = AVDISCARD_DEFAULT;
2635                     break;
2636                 }
2637             p->discard = discard;
2638         }
2639     }
2640
2641     /* open files and write file headers */
2642     for (i = 0; i < nb_output_files; i++) {
2643         oc = output_files[i]->ctx;
2644         oc->interrupt_callback = int_cb;
2645         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
2646             char errbuf[128];
2647             const char *errbuf_ptr = errbuf;
2648             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
2649                 errbuf_ptr = strerror(AVUNERROR(ret));
2650             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
2651             ret = AVERROR(EINVAL);
2652             goto dump_format;
2653         }
2654         assert_avoptions(output_files[i]->opts);
2655         if (strcmp(oc->oformat->name, "rtp")) {
2656             want_sdp = 0;
2657         }
2658     }
2659
2660  dump_format:
2661     /* dump the file output parameters - cannot be done before in case
2662        of stream copy */
2663     for (i = 0; i < nb_output_files; i++) {
2664         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
2665     }
2666
2667     /* dump the stream mapping */
2668     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2669     for (i = 0; i < nb_input_streams; i++) {
2670         ist = input_streams[i];
2671
2672         for (j = 0; j < ist->nb_filters; j++) {
2673             if (ist->filters[j]->graph->graph_desc) {
2674                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
2675                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
2676                        ist->filters[j]->name);
2677                 if (nb_filtergraphs > 1)
2678                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
2679                 av_log(NULL, AV_LOG_INFO, "\n");
2680             }
2681         }
2682     }
2683
2684     for (i = 0; i < nb_output_streams; i++) {
2685         ost = output_streams[i];
2686
2687         if (ost->attachment_filename) {
2688             /* an attached file */
2689             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2690                    ost->attachment_filename, ost->file_index, ost->index);
2691             continue;
2692         }
2693
2694         if (ost->filter && ost->filter->graph->graph_desc) {
2695             /* output from a complex graph */
2696             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
2697             if (nb_filtergraphs > 1)
2698                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
2699
2700             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
2701                    ost->index, ost->enc ? ost->enc->name : "?");
2702             continue;
2703         }
2704
2705         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2706                input_streams[ost->source_index]->file_index,
2707                input_streams[ost->source_index]->st->index,
2708                ost->file_index,
2709                ost->index);
2710         if (ost->sync_ist != input_streams[ost->source_index])
2711             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2712                    ost->sync_ist->file_index,
2713                    ost->sync_ist->st->index);
2714         if (ost->stream_copy)
2715             av_log(NULL, AV_LOG_INFO, " (copy)");
2716         else
2717             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
2718                    input_streams[ost->source_index]->dec->name : "?",
2719                    ost->enc ? ost->enc->name : "?");
2720         av_log(NULL, AV_LOG_INFO, "\n");
2721     }
2722
2723     if (ret) {
2724         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2725         return ret;
2726     }
2727
2728     if (want_sdp) {
2729         print_sdp();
2730     }
2731
2732     return 0;
2733 }
2734
2735 /**
2736  * @return 1 if there are still streams where more output is wanted,
2737  *         0 otherwise
2738  */
2739 static int need_output(void)
2740 {
2741     int i;
2742
2743     for (i = 0; i < nb_output_streams; i++) {
2744         OutputStream *ost    = output_streams[i];
2745         OutputFile *of       = output_files[ost->file_index];
2746         AVFormatContext *os  = output_files[ost->file_index]->ctx;
2747
2748         if (ost->is_past_recording_time ||
2749             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2750             continue;
2751         if (ost->frame_number >= ost->max_frames) {
2752             int j;
2753             for (j = 0; j < of->ctx->nb_streams; j++)
2754                 output_streams[of->ost_index + j]->is_past_recording_time = 1;
2755             continue;
2756         }
2757
2758         return 1;
2759     }
2760
2761     return 0;
2762 }
2763
2764 static int select_input_file(uint8_t *no_packet)
2765 {
2766     int64_t ipts_min = INT64_MAX;
2767     int i, file_index = -1;
2768
2769     for (i = 0; i < nb_input_streams; i++) {
2770         InputStream *ist = input_streams[i];
2771         int64_t ipts     = ist->last_dts;
2772
2773         if (ist->discard || no_packet[ist->file_index])
2774             continue;
2775         if (!input_files[ist->file_index]->eof_reached) {
2776             if (ipts < ipts_min) {
2777                 ipts_min = ipts;
2778                 file_index = ist->file_index;
2779             }
2780         }
2781     }
2782
2783     return file_index;
2784 }
2785
2786 #if HAVE_PTHREADS
2787 static void *input_thread(void *arg)
2788 {
2789     InputFile *f = arg;
2790     int ret = 0;
2791
2792     while (!transcoding_finished && ret >= 0) {
2793         AVPacket pkt;
2794         ret = av_read_frame(f->ctx, &pkt);
2795
2796         if (ret == AVERROR(EAGAIN)) {
2797             usleep(10000);
2798             ret = 0;
2799             continue;
2800         } else if (ret < 0)
2801             break;
2802
2803         pthread_mutex_lock(&f->fifo_lock);
2804         while (!av_fifo_space(f->fifo))
2805             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2806
2807         av_dup_packet(&pkt);
2808         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2809
2810         pthread_mutex_unlock(&f->fifo_lock);
2811     }
2812
2813     f->finished = 1;
2814     return NULL;
2815 }
2816
2817 static void free_input_threads(void)
2818 {
2819     int i;
2820
2821     if (nb_input_files == 1)
2822         return;
2823
2824     transcoding_finished = 1;
2825
2826     for (i = 0; i < nb_input_files; i++) {
2827         InputFile *f = input_files[i];
2828         AVPacket pkt;
2829
2830         if (f->joined)
2831             continue;
2832
2833         pthread_mutex_lock(&f->fifo_lock);
2834         while (av_fifo_size(f->fifo)) {
2835             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2836             av_free_packet(&pkt);
2837         }
2838         pthread_cond_signal(&f->fifo_cond);
2839         pthread_mutex_unlock(&f->fifo_lock);
2840
2841         pthread_join(f->thread, NULL);
2842         f->joined = 1;
2843
2844         while (av_fifo_size(f->fifo)) {
2845             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2846             av_free_packet(&pkt);
2847         }
2848         av_fifo_free(f->fifo);
2849     }
2850 }
2851
2852 static int init_input_threads(void)
2853 {
2854     int i, ret;
2855
2856     if (nb_input_files == 1)
2857         return 0;
2858
2859     for (i = 0; i < nb_input_files; i++) {
2860         InputFile *f = input_files[i];
2861
2862         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2863             return AVERROR(ENOMEM);
2864
2865         pthread_mutex_init(&f->fifo_lock, NULL);
2866         pthread_cond_init (&f->fifo_cond, NULL);
2867
2868         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2869             return AVERROR(ret);
2870     }
2871     return 0;
2872 }
2873
2874 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2875 {
2876     int ret = 0;
2877
2878     pthread_mutex_lock(&f->fifo_lock);
2879
2880     if (av_fifo_size(f->fifo)) {
2881         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2882         pthread_cond_signal(&f->fifo_cond);
2883     } else {
2884         if (f->finished)
2885             ret = AVERROR_EOF;
2886         else
2887             ret = AVERROR(EAGAIN);
2888     }
2889
2890     pthread_mutex_unlock(&f->fifo_lock);
2891
2892     return ret;
2893 }
2894 #endif
2895
2896 static int get_input_packet(InputFile *f, AVPacket *pkt)
2897 {
2898 #if HAVE_PTHREADS
2899     if (nb_input_files > 1)
2900         return get_input_packet_mt(f, pkt);
2901 #endif
2902     return av_read_frame(f->ctx, pkt);
2903 }
2904
2905 /*
2906  * The following code is the main loop of the file converter
2907  */
2908 static int transcode(void)
2909 {
2910     int ret, i;
2911     AVFormatContext *is, *os;
2912     OutputStream *ost;
2913     InputStream *ist;
2914     uint8_t *no_packet;
2915     int no_packet_count = 0;
2916     int64_t timer_start;
2917
2918     if (!(no_packet = av_mallocz(nb_input_files)))
2919         exit_program(1);
2920
2921     ret = transcode_init();
2922     if (ret < 0)
2923         goto fail;
2924
2925     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2926     term_init();
2927
2928     timer_start = av_gettime();
2929
2930 #if HAVE_PTHREADS
2931     if ((ret = init_input_threads()) < 0)
2932         goto fail;
2933 #endif
2934
2935     for (; received_sigterm == 0;) {
2936         int file_index, ist_index;
2937         AVPacket pkt;
2938
2939         /* check if there's any stream where output is still needed */
2940         if (!need_output()) {
2941             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2942             break;
2943         }
2944
2945         /* select the stream that we must read now */
2946         file_index = select_input_file(no_packet);
2947         /* if none, if is finished */
2948         if (file_index < 0) {
2949             if (no_packet_count) {
2950                 no_packet_count = 0;
2951                 memset(no_packet, 0, nb_input_files);
2952                 usleep(10000);
2953                 continue;
2954             }
2955             av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
2956             break;
2957         }
2958
2959         is  = input_files[file_index]->ctx;
2960         ret = get_input_packet(input_files[file_index], &pkt);
2961
2962         if (ret == AVERROR(EAGAIN)) {
2963             no_packet[file_index] = 1;
2964             no_packet_count++;
2965             continue;
2966         }
2967         if (ret < 0) {
2968             input_files[file_index]->eof_reached = 1;
2969
2970             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
2971                 ist = input_streams[input_files[file_index]->ist_index + i];
2972                 if (ist->decoding_needed)
2973                     output_packet(ist, NULL);
2974             }
2975
2976             if (opt_shortest)
2977                 break;
2978             else
2979                 continue;
2980         }
2981
2982         no_packet_count = 0;
2983         memset(no_packet, 0, nb_input_files);
2984
2985         if (do_pkt_dump) {
2986             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2987                              is->streams[pkt.stream_index]);
2988         }
2989         /* the following test is needed in case new streams appear
2990            dynamically in stream : we ignore them */
2991         if (pkt.stream_index >= input_files[file_index]->nb_streams)
2992             goto discard_packet;
2993         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
2994         ist = input_streams[ist_index];
2995         if (ist->discard)
2996             goto discard_packet;
2997
2998         if (pkt.dts != AV_NOPTS_VALUE)
2999             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3000         if (pkt.pts != AV_NOPTS_VALUE)
3001             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3002
3003         if (pkt.pts != AV_NOPTS_VALUE)
3004             pkt.pts *= ist->ts_scale;
3005         if (pkt.dts != AV_NOPTS_VALUE)
3006             pkt.dts *= ist->ts_scale;
3007
3008         //fprintf(stderr, "next:%"PRId64" dts:%"PRId64" off:%"PRId64" %d\n",
3009         //        ist->next_dts,
3010         //        pkt.dts, input_files[ist->file_index].ts_offset,
3011         //        ist->st->codec->codec_type);
3012         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE
3013             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
3014             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3015             int64_t delta   = pkt_dts - ist->next_dts;
3016             if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
3017                 input_files[ist->file_index]->ts_offset -= delta;
3018                 av_log(NULL, AV_LOG_DEBUG,
3019                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3020                        delta, input_files[ist->file_index]->ts_offset);
3021                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3022                 if (pkt.pts != AV_NOPTS_VALUE)
3023                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3024             }
3025         }
3026
3027         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
3028         if (output_packet(ist, &pkt) < 0 || poll_filters() < 0) {
3029             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
3030                    ist->file_index, ist->st->index);
3031             if (exit_on_error)
3032                 exit_program(1);
3033             av_free_packet(&pkt);
3034             continue;
3035         }
3036
3037     discard_packet:
3038         av_free_packet(&pkt);
3039
3040         /* dump report by using the output first video and audio streams */
3041         print_report(0, timer_start);
3042     }
3043 #if HAVE_PTHREADS
3044     free_input_threads();
3045 #endif
3046
3047     /* at the end of stream, we must flush the decoder buffers */
3048     for (i = 0; i < nb_input_streams; i++) {
3049         ist = input_streams[i];
3050         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3051             output_packet(ist, NULL);
3052         }
3053     }
3054     poll_filters();
3055     flush_encoders();
3056
3057     term_exit();
3058
3059     /* write the trailer if needed and close file */
3060     for (i = 0; i < nb_output_files; i++) {
3061         os = output_files[i]->ctx;
3062         av_write_trailer(os);
3063     }
3064
3065     /* dump report by using the first video and audio streams */
3066     print_report(1, timer_start);
3067
3068     /* close each encoder */
3069     for (i = 0; i < nb_output_streams; i++) {
3070         ost = output_streams[i];
3071         if (ost->encoding_needed) {
3072             av_freep(&ost->st->codec->stats_in);
3073             avcodec_close(ost->st->codec);
3074         }
3075     }
3076
3077     /* close each decoder */
3078     for (i = 0; i < nb_input_streams; i++) {
3079         ist = input_streams[i];
3080         if (ist->decoding_needed) {
3081             avcodec_close(ist->st->codec);
3082         }
3083     }
3084
3085     /* finished ! */
3086     ret = 0;
3087
3088  fail:
3089     av_freep(&no_packet);
3090 #if HAVE_PTHREADS
3091     free_input_threads();
3092 #endif
3093
3094     if (output_streams) {
3095         for (i = 0; i < nb_output_streams; i++) {
3096             ost = output_streams[i];
3097             if (ost) {
3098                 if (ost->stream_copy)
3099                     av_freep(&ost->st->codec->extradata);
3100                 if (ost->logfile) {
3101                     fclose(ost->logfile);
3102                     ost->logfile = NULL;
3103                 }
3104                 av_freep(&ost->st->codec->subtitle_header);
3105                 av_free(ost->forced_kf_pts);
3106                 av_dict_free(&ost->opts);
3107             }
3108         }
3109     }
3110     return ret;
3111 }
3112
3113 static double parse_frame_aspect_ratio(const char *arg)
3114 {
3115     int x = 0, y = 0;
3116     double ar = 0;
3117     const char *p;
3118     char *end;
3119
3120     p = strchr(arg, ':');
3121     if (p) {
3122         x = strtol(arg, &end, 10);
3123         if (end == p)
3124             y = strtol(end + 1, &end, 10);
3125         if (x > 0 && y > 0)
3126             ar = (double)x / (double)y;
3127     } else
3128         ar = strtod(arg, NULL);
3129
3130     if (!ar) {
3131         av_log(NULL, AV_LOG_FATAL, "Incorrect aspect ratio specification.\n");
3132         exit_program(1);
3133     }
3134     return ar;
3135 }
3136
3137 static int opt_audio_codec(OptionsContext *o, const char *opt, const char *arg)
3138 {
3139     return parse_option(o, "codec:a", arg, options);
3140 }
3141
3142 static int opt_video_codec(OptionsContext *o, const char *opt, const char *arg)
3143 {
3144     return parse_option(o, "codec:v", arg, options);
3145 }
3146
3147 static int opt_subtitle_codec(OptionsContext *o, const char *opt, const char *arg)
3148 {
3149     return parse_option(o, "codec:s", arg, options);
3150 }
3151
3152 static int opt_data_codec(OptionsContext *o, const char *opt, const char *arg)
3153 {
3154     return parse_option(o, "codec:d", arg, options);
3155 }
3156
3157 static int opt_map(OptionsContext *o, const char *opt, const char *arg)
3158 {
3159     StreamMap *m = NULL;
3160     int i, negative = 0, file_idx;
3161     int sync_file_idx = -1, sync_stream_idx;
3162     char *p, *sync;
3163     char *map;
3164
3165     if (*arg == '-') {
3166         negative = 1;
3167         arg++;
3168     }
3169     map = av_strdup(arg);
3170
3171     /* parse sync stream first, just pick first matching stream */
3172     if (sync = strchr(map, ',')) {
3173         *sync = 0;
3174         sync_file_idx = strtol(sync + 1, &sync, 0);
3175         if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
3176             av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
3177             exit_program(1);
3178         }
3179         if (*sync)
3180             sync++;
3181         for (i = 0; i < input_files[sync_file_idx]->nb_streams; i++)
3182             if (check_stream_specifier(input_files[sync_file_idx]->ctx,
3183                                        input_files[sync_file_idx]->ctx->streams[i], sync) == 1) {
3184                 sync_stream_idx = i;
3185                 break;
3186             }
3187         if (i == input_files[sync_file_idx]->nb_streams) {
3188             av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
3189                                        "match any streams.\n", arg);
3190             exit_program(1);
3191         }
3192     }
3193
3194
3195     if (map[0] == '[') {
3196         /* this mapping refers to lavfi output */
3197         const char *c = map + 1;
3198         o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3199                                     &o->nb_stream_maps, o->nb_stream_maps + 1);
3200         m = &o->stream_maps[o->nb_stream_maps - 1];
3201         m->linklabel = av_get_token(&c, "]");
3202         if (!m->linklabel) {
3203             av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
3204             exit_program(1);
3205         }
3206     } else {
3207         file_idx = strtol(map, &p, 0);
3208         if (file_idx >= nb_input_files || file_idx < 0) {
3209             av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
3210             exit_program(1);
3211         }
3212         if (negative)
3213             /* disable some already defined maps */
3214             for (i = 0; i < o->nb_stream_maps; i++) {
3215                 m = &o->stream_maps[i];
3216                 if (file_idx == m->file_index &&
3217                     check_stream_specifier(input_files[m->file_index]->ctx,
3218                                            input_files[m->file_index]->ctx->streams[m->stream_index],
3219                                            *p == ':' ? p + 1 : p) > 0)
3220                     m->disabled = 1;
3221             }
3222         else
3223             for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
3224                 if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
3225                             *p == ':' ? p + 1 : p) <= 0)
3226                     continue;
3227                 o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3228                                             &o->nb_stream_maps, o->nb_stream_maps + 1);
3229                 m = &o->stream_maps[o->nb_stream_maps - 1];
3230
3231                 m->file_index   = file_idx;
3232                 m->stream_index = i;
3233
3234                 if (sync_file_idx >= 0) {
3235                     m->sync_file_index   = sync_file_idx;
3236                     m->sync_stream_index = sync_stream_idx;
3237                 } else {
3238                     m->sync_file_index   = file_idx;
3239                     m->sync_stream_index = i;
3240                 }
3241             }
3242     }
3243
3244     if (!m) {
3245         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
3246         exit_program(1);
3247     }
3248
3249     av_freep(&map);
3250     return 0;
3251 }
3252
3253 static int opt_attach(OptionsContext *o, const char *opt, const char *arg)
3254 {
3255     o->attachments = grow_array(o->attachments, sizeof(*o->attachments),
3256                                 &o->nb_attachments, o->nb_attachments + 1);
3257     o->attachments[o->nb_attachments - 1] = arg;
3258     return 0;
3259 }
3260
3261 /**
3262  * Parse a metadata specifier in arg.
3263  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
3264  * @param index for type c/p, chapter/program index is written here
3265  * @param stream_spec for type s, the stream specifier is written here
3266  */
3267 static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
3268 {
3269     if (*arg) {
3270         *type = *arg;
3271         switch (*arg) {
3272         case 'g':
3273             break;
3274         case 's':
3275             if (*(++arg) && *arg != ':') {
3276                 av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
3277                 exit_program(1);
3278             }
3279             *stream_spec = *arg == ':' ? arg + 1 : "";
3280             break;
3281         case 'c':
3282         case 'p':
3283             if (*(++arg) == ':')
3284                 *index = strtol(++arg, NULL, 0);
3285             break;
3286         default:
3287             av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
3288             exit_program(1);
3289         }
3290     } else
3291         *type = 'g';
3292 }
3293
3294 static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
3295 {
3296     AVDictionary **meta_in = NULL;
3297     AVDictionary **meta_out;
3298     int i, ret = 0;
3299     char type_in, type_out;
3300     const char *istream_spec = NULL, *ostream_spec = NULL;
3301     int idx_in = 0, idx_out = 0;
3302
3303     parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
3304     parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
3305
3306     if (type_in == 'g' || type_out == 'g')
3307         o->metadata_global_manual = 1;
3308     if (type_in == 's' || type_out == 's')
3309         o->metadata_streams_manual = 1;
3310     if (type_in == 'c' || type_out == 'c')
3311         o->metadata_chapters_manual = 1;
3312
3313 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
3314     if ((index) < 0 || (index) >= (nb_elems)) {\
3315         av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
3316                 (desc), (index));\
3317         exit_program(1);\
3318     }
3319
3320 #define SET_DICT(type, meta, context, index)\
3321         switch (type) {\
3322         case 'g':\
3323             meta = &context->metadata;\
3324             break;\
3325         case 'c':\
3326             METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
3327             meta = &context->chapters[index]->metadata;\
3328             break;\
3329         case 'p':\
3330             METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
3331             meta = &context->programs[index]->metadata;\
3332             break;\
3333         }\
3334
3335     SET_DICT(type_in, meta_in, ic, idx_in);
3336     SET_DICT(type_out, meta_out, oc, idx_out);
3337
3338     /* for input streams choose first matching stream */
3339     if (type_in == 's') {
3340         for (i = 0; i < ic->nb_streams; i++) {
3341             if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
3342                 meta_in = &ic->streams[i]->metadata;
3343                 break;
3344             } else if (ret < 0)
3345                 exit_program(1);
3346         }
3347         if (!meta_in) {
3348             av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
3349             exit_program(1);
3350         }
3351     }
3352
3353     if (type_out == 's') {
3354         for (i = 0; i < oc->nb_streams; i++) {
3355             if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
3356                 meta_out = &oc->streams[i]->metadata;
3357                 av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3358             } else if (ret < 0)
3359                 exit_program(1);
3360         }
3361     } else
3362         av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3363
3364     return 0;
3365 }
3366
3367 static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
3368 {
3369     const char *codec_string = encoder ? "encoder" : "decoder";
3370     AVCodec *codec;
3371
3372     codec = encoder ?
3373         avcodec_find_encoder_by_name(name) :
3374         avcodec_find_decoder_by_name(name);
3375     if (!codec) {
3376         av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
3377         exit_program(1);
3378     }
3379     if (codec->type != type) {
3380         av_log(NULL, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
3381         exit_program(1);
3382     }
3383     return codec;
3384 }
3385
3386 static AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVStream *st)
3387 {
3388     char *codec_name = NULL;
3389
3390     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
3391     if (codec_name) {
3392         AVCodec *codec = find_codec_or_die(codec_name, st->codec->codec_type, 0);
3393         st->codec->codec_id = codec->id;
3394         return codec;
3395     } else
3396         return avcodec_find_decoder(st->codec->codec_id);
3397 }
3398
3399 /**
3400  * Add all the streams from the given input file to the global
3401  * list of input streams.
3402  */
3403 static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
3404 {
3405     int i;
3406
3407     for (i = 0; i < ic->nb_streams; i++) {
3408         AVStream *st = ic->streams[i];
3409         AVCodecContext *dec = st->codec;
3410         InputStream *ist = av_mallocz(sizeof(*ist));
3411         char *framerate = NULL;
3412
3413         if (!ist)
3414             exit_program(1);
3415
3416         input_streams = grow_array(input_streams, sizeof(*input_streams), &nb_input_streams, nb_input_streams + 1);
3417         input_streams[nb_input_streams - 1] = ist;
3418
3419         ist->st = st;
3420         ist->file_index = nb_input_files;
3421         ist->discard = 1;
3422         st->discard  = AVDISCARD_ALL;
3423         ist->opts = filter_codec_opts(codec_opts, ist->st->codec->codec_id, ic, st);
3424
3425         ist->ts_scale = 1.0;
3426         MATCH_PER_STREAM_OPT(ts_scale, dbl, ist->ts_scale, ic, st);
3427
3428         ist->dec = choose_decoder(o, ic, st);
3429
3430         switch (dec->codec_type) {
3431         case AVMEDIA_TYPE_VIDEO:
3432             ist->resample_height  = dec->height;
3433             ist->resample_width   = dec->width;
3434             ist->resample_pix_fmt = dec->pix_fmt;
3435
3436             MATCH_PER_STREAM_OPT(frame_rates, str, framerate, ic, st);
3437             if (framerate && av_parse_video_rate(&ist->framerate,
3438                                                  framerate) < 0) {
3439                 av_log(NULL, AV_LOG_ERROR, "Error parsing framerate %s.\n",
3440                        framerate);
3441                 exit_program(1);
3442             }
3443
3444             break;
3445         case AVMEDIA_TYPE_AUDIO:
3446             guess_input_channel_layout(ist);
3447
3448             ist->resample_sample_fmt     = dec->sample_fmt;
3449             ist->resample_sample_rate    = dec->sample_rate;
3450             ist->resample_channels       = dec->channels;
3451             ist->resample_channel_layout = dec->channel_layout;
3452
3453             break;
3454         case AVMEDIA_TYPE_DATA:
3455         case AVMEDIA_TYPE_SUBTITLE:
3456         case AVMEDIA_TYPE_ATTACHMENT:
3457         case AVMEDIA_TYPE_UNKNOWN:
3458             break;
3459         default:
3460             abort();
3461         }
3462     }
3463 }
3464
3465 static void assert_file_overwrite(const char *filename)
3466 {
3467     if (!file_overwrite &&
3468         (strchr(filename, ':') == NULL || filename[1] == ':' ||
3469          av_strstart(filename, "file:", NULL))) {
3470         if (avio_check(filename, 0) == 0) {
3471             if (!using_stdin) {
3472                 fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
3473                 fflush(stderr);
3474                 if (!read_yesno()) {
3475                     fprintf(stderr, "Not overwriting - exiting\n");
3476                     exit_program(1);
3477                 }
3478             }
3479             else {
3480                 fprintf(stderr,"File '%s' already exists. Exiting.\n", filename);
3481                 exit_program(1);
3482             }
3483         }
3484     }
3485 }
3486
3487 static void dump_attachment(AVStream *st, const char *filename)
3488 {
3489     int ret;
3490     AVIOContext *out = NULL;
3491     AVDictionaryEntry *e;
3492
3493     if (!st->codec->extradata_size) {
3494         av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
3495                nb_input_files - 1, st->index);
3496         return;
3497     }
3498     if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
3499         filename = e->value;
3500     if (!*filename) {
3501         av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
3502                "in stream #%d:%d.\n", nb_input_files - 1, st->index);
3503         exit_program(1);
3504     }
3505
3506     assert_file_overwrite(filename);
3507
3508     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
3509         av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
3510                filename);
3511         exit_program(1);
3512     }
3513
3514     avio_write(out, st->codec->extradata, st->codec->extradata_size);
3515     avio_flush(out);
3516     avio_close(out);
3517 }
3518
3519 static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
3520 {
3521     AVFormatContext *ic;
3522     AVInputFormat *file_iformat = NULL;
3523     int err, i, ret;
3524     int64_t timestamp;
3525     uint8_t buf[128];
3526     AVDictionary **opts;
3527     int orig_nb_streams;                     // number of streams before avformat_find_stream_info
3528
3529     if (o->format) {
3530         if (!(file_iformat = av_find_input_format(o->format))) {
3531             av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
3532             exit_program(1);
3533         }
3534     }
3535
3536     if (!strcmp(filename, "-"))
3537         filename = "pipe:";
3538
3539     using_stdin |= !strncmp(filename, "pipe:", 5) ||
3540                     !strcmp(filename, "/dev/stdin");
3541
3542     /* get default parameters from command line */
3543     ic = avformat_alloc_context();
3544     if (!ic) {
3545         print_error(filename, AVERROR(ENOMEM));
3546         exit_program(1);
3547     }
3548     if (o->nb_audio_sample_rate) {
3549         snprintf(buf, sizeof(buf), "%d", o->audio_sample_rate[o->nb_audio_sample_rate - 1].u.i);
3550         av_dict_set(&format_opts, "sample_rate", buf, 0);
3551     }
3552     if (o->nb_audio_channels) {
3553         /* because we set audio_channels based on both the "ac" and
3554          * "channel_layout" options, we need to check that the specified
3555          * demuxer actually has the "channels" option before setting it */
3556         if (file_iformat && file_iformat->priv_class &&
3557             av_opt_find(&file_iformat->priv_class, "channels", NULL, 0,
3558                         AV_OPT_SEARCH_FAKE_OBJ)) {
3559             snprintf(buf, sizeof(buf), "%d",
3560                      o->audio_channels[o->nb_audio_channels - 1].u.i);
3561             av_dict_set(&format_opts, "channels", buf, 0);
3562         }
3563     }
3564     if (o->nb_frame_rates) {
3565         /* set the format-level framerate option;
3566          * this is important for video grabbers, e.g. x11 */
3567         if (file_iformat && file_iformat->priv_class &&
3568             av_opt_find(&file_iformat->priv_class, "framerate", NULL, 0,
3569                         AV_OPT_SEARCH_FAKE_OBJ)) {
3570             av_dict_set(&format_opts, "framerate",
3571                         o->frame_rates[o->nb_frame_rates - 1].u.str, 0);
3572         }
3573     }
3574     if (o->nb_frame_sizes) {
3575         av_dict_set(&format_opts, "video_size", o->frame_sizes[o->nb_frame_sizes - 1].u.str, 0);
3576     }
3577     if (o->nb_frame_pix_fmts)
3578         av_dict_set(&format_opts, "pixel_format", o->frame_pix_fmts[o->nb_frame_pix_fmts - 1].u.str, 0);
3579
3580     ic->flags |= AVFMT_FLAG_NONBLOCK;
3581     ic->interrupt_callback = int_cb;
3582
3583     /* open the input file with generic libav function */
3584     err = avformat_open_input(&ic, filename, file_iformat, &format_opts);
3585     if (err < 0) {
3586         print_error(filename, err);
3587         exit_program(1);
3588     }
3589     assert_avoptions(format_opts);
3590
3591     /* apply forced codec ids */
3592     for (i = 0; i < ic->nb_streams; i++)
3593         choose_decoder(o, ic, ic->streams[i]);
3594
3595     /* Set AVCodecContext options for avformat_find_stream_info */
3596     opts = setup_find_stream_info_opts(ic, codec_opts);
3597     orig_nb_streams = ic->nb_streams;
3598
3599     /* If not enough info to get the stream parameters, we decode the
3600        first frames to get it. (used in mpeg case for example) */
3601     ret = avformat_find_stream_info(ic, opts);
3602     if (ret < 0) {
3603         av_log(NULL, AV_LOG_FATAL, "%s: could not find codec parameters\n", filename);
3604         avformat_close_input(&ic);
3605         exit_program(1);
3606     }
3607
3608     timestamp = o->start_time;
3609     /* add the stream start time */
3610     if (ic->start_time != AV_NOPTS_VALUE)
3611         timestamp += ic->start_time;
3612
3613     /* if seeking requested, we execute it */
3614     if (o->start_time != 0) {
3615         ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
3616         if (ret < 0) {
3617             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
3618                    filename, (double)timestamp / AV_TIME_BASE);
3619         }
3620     }
3621
3622     /* update the current parameters so that they match the one of the input stream */
3623     add_input_streams(o, ic);
3624
3625     /* dump the file content */
3626     av_dump_format(ic, nb_input_files, filename, 0);
3627
3628     input_files = grow_array(input_files, sizeof(*input_files), &nb_input_files, nb_input_files + 1);
3629     if (!(input_files[nb_input_files - 1] = av_mallocz(sizeof(*input_files[0]))))
3630         exit_program(1);
3631
3632     input_files[nb_input_files - 1]->ctx        = ic;
3633     input_files[nb_input_files - 1]->ist_index  = nb_input_streams - ic->nb_streams;
3634     input_files[nb_input_files - 1]->ts_offset  = o->input_ts_offset - (copy_ts ? 0 : timestamp);
3635     input_files[nb_input_files - 1]->nb_streams = ic->nb_streams;
3636     input_files[nb_input_files - 1]->rate_emu   = o->rate_emu;
3637
3638     for (i = 0; i < o->nb_dump_attachment; i++) {
3639         int j;
3640
3641         for (j = 0; j < ic->nb_streams; j++) {
3642             AVStream *st = ic->streams[j];
3643
3644             if (check_stream_specifier(ic, st, o->dump_attachment[i].specifier) == 1)
3645                 dump_attachment(st, o->dump_attachment[i].u.str);
3646         }
3647     }
3648
3649     for (i = 0; i < orig_nb_streams; i++)
3650         av_dict_free(&opts[i]);
3651     av_freep(&opts);
3652
3653     reset_options(o);
3654     return 0;
3655 }
3656
3657 static void parse_forced_key_frames(char *kf, OutputStream *ost,
3658                                     AVCodecContext *avctx)
3659 {
3660     char *p;
3661     int n = 1, i;
3662     int64_t t;
3663
3664     for (p = kf; *p; p++)
3665         if (*p == ',')
3666             n++;
3667     ost->forced_kf_count = n;
3668     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
3669     if (!ost->forced_kf_pts) {
3670         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
3671         exit_program(1);
3672     }
3673     for (i = 0; i < n; i++) {
3674         p = i ? strchr(p, ',') + 1 : kf;
3675         t = parse_time_or_die("force_key_frames", p, 1);
3676         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
3677     }
3678 }
3679
3680 static uint8_t *get_line(AVIOContext *s)
3681 {
3682     AVIOContext *line;
3683     uint8_t *buf;
3684     char c;
3685
3686     if (avio_open_dyn_buf(&line) < 0) {
3687         av_log(NULL, AV_LOG_FATAL, "Could not alloc buffer for reading preset.\n");
3688         exit_program(1);
3689     }
3690
3691     while ((c = avio_r8(s)) && c != '\n')
3692         avio_w8(line, c);
3693     avio_w8(line, 0);
3694     avio_close_dyn_buf(line, &buf);
3695
3696     return buf;
3697 }
3698
3699 static int get_preset_file_2(const char *preset_name, const char *codec_name, AVIOContext **s)
3700 {
3701     int i, ret = 1;
3702     char filename[1000];
3703     const char *base[3] = { getenv("AVCONV_DATADIR"),
3704                             getenv("HOME"),
3705                             AVCONV_DATADIR,
3706                             };
3707
3708     for (i = 0; i < FF_ARRAY_ELEMS(base) && ret; i++) {
3709         if (!base[i])
3710             continue;
3711         if (codec_name) {
3712             snprintf(filename, sizeof(filename), "%s%s/%s-%s.avpreset", base[i],
3713                      i != 1 ? "" : "/.avconv", codec_name, preset_name);
3714             ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
3715         }
3716         if (ret) {
3717             snprintf(filename, sizeof(filename), "%s%s/%s.avpreset", base[i],
3718                      i != 1 ? "" : "/.avconv", preset_name);
3719             ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
3720         }
3721     }
3722     return ret;
3723 }
3724
3725 static void choose_encoder(OptionsContext *o, AVFormatContext *s, OutputStream *ost)
3726 {
3727     char *codec_name = NULL;
3728
3729     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, ost->st);
3730     if (!codec_name) {
3731         ost->st->codec->codec_id = av_guess_codec(s->oformat, NULL, s->filename,
3732                                                   NULL, ost->st->codec->codec_type);
3733         ost->enc = avcodec_find_encoder(ost->st->codec->codec_id);
3734     } else if (!strcmp(codec_name, "copy"))
3735         ost->stream_copy = 1;
3736     else {
3737         ost->enc = find_codec_or_die(codec_name, ost->st->codec->codec_type, 1);
3738         ost->st->codec->codec_id = ost->enc->id;
3739     }
3740 }
3741
3742 static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, enum AVMediaType type)
3743 {
3744     OutputStream *ost;
3745     AVStream *st = avformat_new_stream(oc, NULL);
3746     int idx      = oc->nb_streams - 1, ret = 0;
3747     char *bsf = NULL, *next, *codec_tag = NULL;
3748     AVBitStreamFilterContext *bsfc, *bsfc_prev = NULL;
3749     double qscale = -1;
3750     char *buf = NULL, *arg = NULL, *preset = NULL;
3751     AVIOContext *s = NULL;
3752
3753     if (!st) {
3754         av_log(NULL, AV_LOG_FATAL, "Could not alloc stream.\n");
3755         exit_program(1);
3756     }
3757
3758     if (oc->nb_streams - 1 < o->nb_streamid_map)
3759         st->id = o->streamid_map[oc->nb_streams - 1];
3760
3761     output_streams = grow_array(output_streams, sizeof(*output_streams), &nb_output_streams,
3762                                 nb_output_streams + 1);
3763     if (!(ost = av_mallocz(sizeof(*ost))))
3764         exit_program(1);
3765     output_streams[nb_output_streams - 1] = ost;
3766
3767     ost->file_index = nb_output_files;
3768     ost->index      = idx;
3769     ost->st         = st;
3770     st->codec->codec_type = type;
3771     choose_encoder(o, oc, ost);
3772     if (ost->enc) {
3773         ost->opts  = filter_codec_opts(codec_opts, ost->enc->id, oc, st);
3774     }
3775
3776     avcodec_get_context_defaults3(st->codec, ost->enc);
3777     st->codec->codec_type = type; // XXX hack, avcodec_get_context_defaults2() sets type to unknown for stream copy
3778
3779     MATCH_PER_STREAM_OPT(presets, str, preset, oc, st);
3780     if (preset && (!(ret = get_preset_file_2(preset, ost->enc->name, &s)))) {
3781         do  {
3782             buf = get_line(s);
3783             if (!buf[0] || buf[0] == '#') {
3784                 av_free(buf);
3785                 continue;
3786             }
3787             if (!(arg = strchr(buf, '='))) {
3788                 av_log(NULL, AV_LOG_FATAL, "Invalid line found in the preset file.\n");
3789                 exit_program(1);
3790             }
3791             *arg++ = 0;
3792             av_dict_set(&ost->opts, buf, arg, AV_DICT_DONT_OVERWRITE);
3793             av_free(buf);
3794         } while (!s->eof_reached);
3795         avio_close(s);
3796     }
3797     if (ret) {
3798         av_log(NULL, AV_LOG_FATAL,
3799                "Preset %s specified for stream %d:%d, but could not be opened.\n",
3800                preset, ost->file_index, ost->index);
3801         exit_program(1);
3802     }
3803
3804     ost->max_frames = INT64_MAX;
3805     MATCH_PER_STREAM_OPT(max_frames, i64, ost->max_frames, oc, st);
3806
3807     MATCH_PER_STREAM_OPT(bitstream_filters, str, bsf, oc, st);
3808     while (bsf) {
3809         if (next = strchr(bsf, ','))
3810             *next++ = 0;
3811         if (!(bsfc = av_bitstream_filter_init(bsf))) {
3812             av_log(NULL, AV_LOG_FATAL, "Unknown bitstream filter %s\n", bsf);
3813             exit_program(1);
3814         }
3815         if (bsfc_prev)
3816             bsfc_prev->next = bsfc;
3817         else
3818             ost->bitstream_filters = bsfc;
3819
3820         bsfc_prev = bsfc;
3821         bsf       = next;
3822     }
3823
3824     MATCH_PER_STREAM_OPT(codec_tags, str, codec_tag, oc, st);
3825     if (codec_tag) {
3826         uint32_t tag = strtol(codec_tag, &next, 0);
3827         if (*next)
3828             tag = AV_RL32(codec_tag);
3829         st->codec->codec_tag = tag;
3830     }
3831
3832     MATCH_PER_STREAM_OPT(qscale, dbl, qscale, oc, st);
3833     if (qscale >= 0 || same_quant) {
3834         st->codec->flags |= CODEC_FLAG_QSCALE;
3835         st->codec->global_quality = FF_QP2LAMBDA * qscale;
3836     }
3837
3838     if (oc->oformat->flags & AVFMT_GLOBALHEADER)
3839         st->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
3840
3841     av_opt_get_int(sws_opts, "sws_flags", 0, &ost->sws_flags);
3842
3843     ost->pix_fmts[0] = ost->pix_fmts[1] = PIX_FMT_NONE;
3844
3845     return ost;
3846 }
3847
3848 static void parse_matrix_coeffs(uint16_t *dest, const char *str)
3849 {
3850     int i;
3851     const char *p = str;
3852     for (i = 0;; i++) {
3853         dest[i] = atoi(p);
3854         if (i == 63)
3855             break;
3856         p = strchr(p, ',');
3857         if (!p) {
3858             av_log(NULL, AV_LOG_FATAL, "Syntax error in matrix \"%s\" at coeff %d\n", str, i);
3859             exit_program(1);
3860         }
3861         p++;
3862     }
3863 }
3864
3865 static OutputStream *new_video_stream(OptionsContext *o, AVFormatContext *oc)
3866 {
3867     AVStream *st;
3868     OutputStream *ost;
3869     AVCodecContext *video_enc;
3870
3871     ost = new_output_stream(o, oc, AVMEDIA_TYPE_VIDEO);
3872     st  = ost->st;
3873     video_enc = st->codec;
3874
3875     if (!ost->stream_copy) {
3876         const char *p = NULL;
3877         char *forced_key_frames = NULL, *frame_rate = NULL, *frame_size = NULL;
3878         char *frame_aspect_ratio = NULL, *frame_pix_fmt = NULL;
3879         char *intra_matrix = NULL, *inter_matrix = NULL;
3880         const char *filters = "null";
3881         int i;
3882
3883         MATCH_PER_STREAM_OPT(frame_rates, str, frame_rate, oc, st);
3884         if (frame_rate && av_parse_video_rate(&ost->frame_rate, frame_rate) < 0) {
3885             av_log(NULL, AV_LOG_FATAL, "Invalid framerate value: %s\n", frame_rate);
3886             exit_program(1);
3887         }
3888
3889         MATCH_PER_STREAM_OPT(frame_sizes, str, frame_size, oc, st);
3890         if (frame_size && av_parse_video_size(&video_enc->width, &video_enc->height, frame_size) < 0) {
3891             av_log(NULL, AV_LOG_FATAL, "Invalid frame size: %s.\n", frame_size);
3892             exit_program(1);
3893         }
3894
3895         MATCH_PER_STREAM_OPT(frame_aspect_ratios, str, frame_aspect_ratio, oc, st);
3896         if (frame_aspect_ratio)
3897             ost->frame_aspect_ratio = parse_frame_aspect_ratio(frame_aspect_ratio);
3898
3899         MATCH_PER_STREAM_OPT(frame_pix_fmts, str, frame_pix_fmt, oc, st);
3900         if (frame_pix_fmt && (video_enc->pix_fmt = av_get_pix_fmt(frame_pix_fmt)) == PIX_FMT_NONE) {
3901             av_log(NULL, AV_LOG_FATAL, "Unknown pixel format requested: %s.\n", frame_pix_fmt);
3902             exit_program(1);
3903         }
3904         st->sample_aspect_ratio = video_enc->sample_aspect_ratio;
3905
3906         MATCH_PER_STREAM_OPT(intra_matrices, str, intra_matrix, oc, st);
3907         if (intra_matrix) {
3908             if (!(video_enc->intra_matrix = av_mallocz(sizeof(*video_enc->intra_matrix) * 64))) {
3909                 av_log(NULL, AV_LOG_FATAL, "Could not allocate memory for intra matrix.\n");
3910                 exit_program(1);
3911             }
3912             parse_matrix_coeffs(video_enc->intra_matrix, intra_matrix);
3913         }
3914         MATCH_PER_STREAM_OPT(inter_matrices, str, inter_matrix, oc, st);
3915         if (inter_matrix) {
3916             if (!(video_enc->inter_matrix = av_mallocz(sizeof(*video_enc->inter_matrix) * 64))) {
3917                 av_log(NULL, AV_LOG_FATAL, "Could not allocate memory for inter matrix.\n");
3918                 exit_program(1);
3919             }
3920             parse_matrix_coeffs(video_enc->inter_matrix, inter_matrix);
3921         }
3922
3923         MATCH_PER_STREAM_OPT(rc_overrides, str, p, oc, st);
3924         for (i = 0; p; i++) {
3925             int start, end, q;
3926             int e = sscanf(p, "%d,%d,%d", &start, &end, &q);
3927             if (e != 3) {
3928                 av_log(NULL, AV_LOG_FATAL, "error parsing rc_override\n");
3929                 exit_program(1);
3930             }
3931             video_enc->rc_override =
3932                 av_realloc(video_enc->rc_override,
3933                            sizeof(RcOverride) * (i + 1));
3934             video_enc->rc_override[i].start_frame = start;
3935             video_enc->rc_override[i].end_frame   = end;
3936             if (q > 0) {
3937                 video_enc->rc_override[i].qscale         = q;
3938                 video_enc->rc_override[i].quality_factor = 1.0;
3939             }
3940             else {
3941                 video_enc->rc_override[i].qscale         = 0;
3942                 video_enc->rc_override[i].quality_factor = -q/100.0;
3943             }
3944             p = strchr(p, '/');
3945             if (p) p++;
3946         }
3947         video_enc->rc_override_count = i;
3948         if (!video_enc->rc_initial_buffer_occupancy)
3949             video_enc->rc_initial_buffer_occupancy = video_enc->rc_buffer_size * 3 / 4;
3950         video_enc->intra_dc_precision = intra_dc_precision - 8;
3951
3952         /* two pass mode */
3953         if (do_pass) {
3954             if (do_pass == 1) {
3955                 video_enc->flags |= CODEC_FLAG_PASS1;
3956             } else {
3957                 video_enc->flags |= CODEC_FLAG_PASS2;
3958             }
3959         }
3960
3961         MATCH_PER_STREAM_OPT(forced_key_frames, str, forced_key_frames, oc, st);
3962         if (forced_key_frames)
3963             parse_forced_key_frames(forced_key_frames, ost, video_enc);
3964
3965         MATCH_PER_STREAM_OPT(force_fps, i, ost->force_fps, oc, st);
3966
3967         ost->top_field_first = -1;
3968         MATCH_PER_STREAM_OPT(top_field_first, i, ost->top_field_first, oc, st);
3969
3970         MATCH_PER_STREAM_OPT(filters, str, filters, oc, st);
3971         ost->avfilter = av_strdup(filters);
3972     } else {
3973         MATCH_PER_STREAM_OPT(copy_initial_nonkeyframes, i, ost->copy_initial_nonkeyframes, oc ,st);
3974     }
3975
3976     return ost;
3977 }
3978
3979 static OutputStream *new_audio_stream(OptionsContext *o, AVFormatContext *oc)
3980 {
3981     AVStream *st;
3982     OutputStream *ost;
3983     AVCodecContext *audio_enc;
3984
3985     ost = new_output_stream(o, oc, AVMEDIA_TYPE_AUDIO);
3986     st  = ost->st;
3987
3988     audio_enc = st->codec;
3989     audio_enc->codec_type = AVMEDIA_TYPE_AUDIO;
3990
3991     if (!ost->stream_copy) {
3992         char *sample_fmt = NULL;
3993         const char *filters = "anull";
3994
3995         MATCH_PER_STREAM_OPT(audio_channels, i, audio_enc->channels, oc, st);
3996
3997         MATCH_PER_STREAM_OPT(sample_fmts, str, sample_fmt, oc, st);
3998         if (sample_fmt &&
3999             (audio_enc->sample_fmt = av_get_sample_fmt(sample_fmt)) == AV_SAMPLE_FMT_NONE) {
4000             av_log(NULL, AV_LOG_FATAL, "Invalid sample format '%s'\n", sample_fmt);
4001             exit_program(1);
4002         }
4003
4004         MATCH_PER_STREAM_OPT(audio_sample_rate, i, audio_enc->sample_rate, oc, st);
4005
4006         MATCH_PER_STREAM_OPT(filters, str, filters, oc, st);
4007         ost->avfilter = av_strdup(filters);
4008     }
4009
4010     return ost;
4011 }
4012
4013 static OutputStream *new_data_stream(OptionsContext *o, AVFormatContext *oc)
4014 {
4015     OutputStream *ost;
4016
4017     ost = new_output_stream(o, oc, AVMEDIA_TYPE_DATA);
4018     if (!ost->stream_copy) {
4019         av_log(NULL, AV_LOG_FATAL, "Data stream encoding not supported yet (only streamcopy)\n");
4020         exit_program(1);
4021     }
4022
4023     return ost;
4024 }
4025
4026 static OutputStream *new_attachment_stream(OptionsContext *o, AVFormatContext *oc)
4027 {
4028     OutputStream *ost = new_output_stream(o, oc, AVMEDIA_TYPE_ATTACHMENT);
4029     ost->stream_copy = 1;
4030     return ost;
4031 }
4032
4033 static OutputStream *new_subtitle_stream(OptionsContext *o, AVFormatContext *oc)
4034 {
4035     AVStream *st;
4036     OutputStream *ost;
4037     AVCodecContext *subtitle_enc;
4038
4039     ost = new_output_stream(o, oc, AVMEDIA_TYPE_SUBTITLE);
4040     st  = ost->st;
4041     subtitle_enc = st->codec;
4042
4043     subtitle_enc->codec_type = AVMEDIA_TYPE_SUBTITLE;
4044
4045     return ost;
4046 }
4047
4048 /* arg format is "output-stream-index:streamid-value". */
4049 static int opt_streamid(OptionsContext *o, const char *opt, const char *arg)
4050 {
4051     int idx;
4052     char *p;
4053     char idx_str[16];
4054
4055     av_strlcpy(idx_str, arg, sizeof(idx_str));
4056     p = strchr(idx_str, ':');
4057     if (!p) {
4058         av_log(NULL, AV_LOG_FATAL,
4059                "Invalid value '%s' for option '%s', required syntax is 'index:value'\n",
4060                arg, opt);
4061         exit_program(1);
4062     }
4063     *p++ = '\0';
4064     idx = parse_number_or_die(opt, idx_str, OPT_INT, 0, INT_MAX);
4065     o->streamid_map = grow_array(o->streamid_map, sizeof(*o->streamid_map), &o->nb_streamid_map, idx+1);
4066     o->streamid_map[idx] = parse_number_or_die(opt, p, OPT_INT, 0, INT_MAX);
4067     return 0;
4068 }
4069
4070 static int copy_chapters(InputFile *ifile, OutputFile *ofile, int copy_metadata)
4071 {
4072     AVFormatContext *is = ifile->ctx;
4073     AVFormatContext *os = ofile->ctx;
4074     int i;
4075
4076     for (i = 0; i < is->nb_chapters; i++) {
4077         AVChapter *in_ch = is->chapters[i], *out_ch;
4078         int64_t ts_off   = av_rescale_q(ofile->start_time - ifile->ts_offset,
4079                                        AV_TIME_BASE_Q, in_ch->time_base);
4080         int64_t rt       = (ofile->recording_time == INT64_MAX) ? INT64_MAX :
4081                            av_rescale_q(ofile->recording_time, AV_TIME_BASE_Q, in_ch->time_base);
4082
4083
4084         if (in_ch->end < ts_off)
4085             continue;
4086         if (rt != INT64_MAX && in_ch->start > rt + ts_off)
4087             break;
4088
4089         out_ch = av_mallocz(sizeof(AVChapter));
4090         if (!out_ch)
4091             return AVERROR(ENOMEM);
4092
4093         out_ch->id        = in_ch->id;
4094         out_ch->time_base = in_ch->time_base;
4095         out_ch->start     = FFMAX(0,  in_ch->start - ts_off);
4096         out_ch->end       = FFMIN(rt, in_ch->end   - ts_off);
4097
4098         if (copy_metadata)
4099             av_dict_copy(&out_ch->metadata, in_ch->metadata, 0);
4100
4101         os->nb_chapters++;
4102         os->chapters = av_realloc(os->chapters, sizeof(AVChapter) * os->nb_chapters);
4103         if (!os->chapters)
4104             return AVERROR(ENOMEM);
4105         os->chapters[os->nb_chapters - 1] = out_ch;
4106     }
4107     return 0;
4108 }
4109
4110 static void init_output_filter(OutputFilter *ofilter, OptionsContext *o,
4111                                AVFormatContext *oc)
4112 {
4113     OutputStream *ost;
4114
4115     switch (avfilter_pad_get_type(ofilter->out_tmp->filter_ctx->output_pads,
4116                                   ofilter->out_tmp->pad_idx)) {
4117     case AVMEDIA_TYPE_VIDEO: ost = new_video_stream(o, oc); break;
4118     case AVMEDIA_TYPE_AUDIO: ost = new_audio_stream(o, oc); break;
4119     default:
4120         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters are supported "
4121                "currently.\n");
4122         exit_program(1);
4123     }
4124
4125     ost->source_index = -1;
4126     ost->filter       = ofilter;
4127
4128     ofilter->ost      = ost;
4129
4130     if (ost->stream_copy) {
4131         av_log(NULL, AV_LOG_ERROR, "Streamcopy requested for output stream %d:%d, "
4132                "which is fed from a complex filtergraph. Filtering and streamcopy "
4133                "cannot be used together.\n", ost->file_index, ost->index);
4134         exit_program(1);
4135     }
4136
4137     if (configure_output_filter(ofilter->graph, ofilter, ofilter->out_tmp) < 0) {
4138         av_log(NULL, AV_LOG_FATAL, "Error configuring filter.\n");
4139         exit_program(1);
4140     }
4141     avfilter_inout_free(&ofilter->out_tmp);
4142 }
4143
4144 static void opt_output_file(void *optctx, const char *filename)
4145 {
4146     OptionsContext *o = optctx;
4147     AVFormatContext *oc;
4148     int i, j, err;
4149     AVOutputFormat *file_oformat;
4150     OutputStream *ost;
4151     InputStream  *ist;
4152
4153     if (configure_complex_filters() < 0) {
4154         av_log(NULL, AV_LOG_FATAL, "Error configuring filters.\n");
4155         exit_program(1);
4156     }
4157
4158     if (!strcmp(filename, "-"))
4159         filename = "pipe:";
4160
4161     oc = avformat_alloc_context();
4162     if (!oc) {
4163         print_error(filename, AVERROR(ENOMEM));
4164         exit_program(1);
4165     }
4166
4167     if (o->format) {
4168         file_oformat = av_guess_format(o->format, NULL, NULL);
4169         if (!file_oformat) {
4170             av_log(NULL, AV_LOG_FATAL, "Requested output format '%s' is not a suitable output format\n", o->format);
4171             exit_program(1);
4172         }
4173     } else {
4174         file_oformat = av_guess_format(NULL, filename, NULL);
4175         if (!file_oformat) {
4176             av_log(NULL, AV_LOG_FATAL, "Unable to find a suitable output format for '%s'\n",
4177                    filename);
4178             exit_program(1);
4179         }
4180     }
4181
4182     oc->oformat = file_oformat;
4183     oc->interrupt_callback = int_cb;
4184     av_strlcpy(oc->filename, filename, sizeof(oc->filename));
4185
4186     /* create streams for all unlabeled output pads */
4187     for (i = 0; i < nb_filtergraphs; i++) {
4188         FilterGraph *fg = filtergraphs[i];
4189         for (j = 0; j < fg->nb_outputs; j++) {
4190             OutputFilter *ofilter = fg->outputs[j];
4191
4192             if (!ofilter->out_tmp || ofilter->out_tmp->name)
4193                 continue;
4194
4195             switch (avfilter_pad_get_type(ofilter->out_tmp->filter_ctx->output_pads,
4196                                           ofilter->out_tmp->pad_idx)) {
4197             case AVMEDIA_TYPE_VIDEO:    o->video_disable    = 1; break;
4198             case AVMEDIA_TYPE_AUDIO:    o->audio_disable    = 1; break;
4199             case AVMEDIA_TYPE_SUBTITLE: o->subtitle_disable = 1; break;
4200             }
4201             init_output_filter(ofilter, o, oc);
4202         }
4203     }
4204
4205     if (!o->nb_stream_maps) {
4206         /* pick the "best" stream of each type */
4207 #define NEW_STREAM(type, index)\
4208         if (index >= 0) {\
4209             ost = new_ ## type ## _stream(o, oc);\
4210             ost->source_index = index;\
4211             ost->sync_ist     = input_streams[index];\
4212             input_streams[index]->discard = 0;\
4213             input_streams[index]->st->discard = AVDISCARD_NONE;\
4214         }
4215
4216         /* video: highest resolution */
4217         if (!o->video_disable && oc->oformat->video_codec != CODEC_ID_NONE) {
4218             int area = 0, idx = -1;
4219             for (i = 0; i < nb_input_streams; i++) {
4220                 ist = input_streams[i];
4221                 if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
4222                     ist->st->codec->width * ist->st->codec->height > area) {
4223                     area = ist->st->codec->width * ist->st->codec->height;
4224                     idx = i;
4225                 }
4226             }
4227             NEW_STREAM(video, idx);
4228         }
4229
4230         /* audio: most channels */
4231         if (!o->audio_disable && oc->oformat->audio_codec != CODEC_ID_NONE) {
4232             int channels = 0, idx = -1;
4233             for (i = 0; i < nb_input_streams; i++) {
4234                 ist = input_streams[i];
4235                 if (ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
4236                     ist->st->codec->channels > channels) {
4237                     channels = ist->st->codec->channels;
4238                     idx = i;
4239                 }
4240             }
4241             NEW_STREAM(audio, idx);
4242         }
4243
4244         /* subtitles: pick first */
4245         if (!o->subtitle_disable && oc->oformat->subtitle_codec != CODEC_ID_NONE) {
4246             for (i = 0; i < nb_input_streams; i++)
4247                 if (input_streams[i]->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
4248                     NEW_STREAM(subtitle, i);
4249                     break;
4250                 }
4251         }
4252         /* do something with data? */
4253     } else {
4254         for (i = 0; i < o->nb_stream_maps; i++) {
4255             StreamMap *map = &o->stream_maps[i];
4256
4257             if (map->disabled)
4258                 continue;
4259
4260             if (map->linklabel) {
4261                 FilterGraph *fg;
4262                 OutputFilter *ofilter = NULL;
4263                 int j, k;
4264
4265                 for (j = 0; j < nb_filtergraphs; j++) {
4266                     fg = filtergraphs[j];
4267                     for (k = 0; k < fg->nb_outputs; k++) {
4268                         AVFilterInOut *out = fg->outputs[k]->out_tmp;
4269                         if (out && !strcmp(out->name, map->linklabel)) {
4270                             ofilter = fg->outputs[k];
4271                             goto loop_end;
4272                         }
4273                     }
4274                 }
4275 loop_end:
4276                 if (!ofilter) {
4277                     av_log(NULL, AV_LOG_FATAL, "Output with label '%s' does not exist "
4278                            "in any defined filter graph.\n", map->linklabel);
4279                     exit_program(1);
4280                 }
4281                 init_output_filter(ofilter, o, oc);
4282             } else {
4283                 ist = input_streams[input_files[map->file_index]->ist_index + map->stream_index];
4284                 switch (ist->st->codec->codec_type) {
4285                 case AVMEDIA_TYPE_VIDEO:    ost = new_video_stream(o, oc);    break;
4286                 case AVMEDIA_TYPE_AUDIO:    ost = new_audio_stream(o, oc);    break;
4287                 case AVMEDIA_TYPE_SUBTITLE: ost = new_subtitle_stream(o, oc); break;
4288                 case AVMEDIA_TYPE_DATA:     ost = new_data_stream(o, oc);     break;
4289                 case AVMEDIA_TYPE_ATTACHMENT: ost = new_attachment_stream(o, oc); break;
4290                 default:
4291                     av_log(NULL, AV_LOG_FATAL, "Cannot map stream #%d:%d - unsupported type.\n",
4292                            map->file_index, map->stream_index);
4293                     exit_program(1);
4294                 }
4295
4296                 ost->source_index = input_files[map->file_index]->ist_index + map->stream_index;
4297                 ost->sync_ist     = input_streams[input_files[map->sync_file_index]->ist_index +
4298                                                map->sync_stream_index];
4299                 ist->discard = 0;
4300                 ist->st->discard = AVDISCARD_NONE;
4301             }
4302         }
4303     }
4304
4305     /* handle attached files */
4306     for (i = 0; i < o->nb_attachments; i++) {
4307         AVIOContext *pb;
4308         uint8_t *attachment;
4309         const char *p;
4310         int64_t len;
4311
4312         if ((err = avio_open2(&pb, o->attachments[i], AVIO_FLAG_READ, &int_cb, NULL)) < 0) {
4313             av_log(NULL, AV_LOG_FATAL, "Could not open attachment file %s.\n",
4314                    o->attachments[i]);
4315             exit_program(1);
4316         }
4317         if ((len = avio_size(pb)) <= 0) {
4318             av_log(NULL, AV_LOG_FATAL, "Could not get size of the attachment %s.\n",
4319                    o->attachments[i]);
4320             exit_program(1);
4321         }
4322         if (!(attachment = av_malloc(len))) {
4323             av_log(NULL, AV_LOG_FATAL, "Attachment %s too large to fit into memory.\n",
4324                    o->attachments[i]);
4325             exit_program(1);
4326         }
4327         avio_read(pb, attachment, len);
4328
4329         ost = new_attachment_stream(o, oc);
4330         ost->stream_copy               = 0;
4331         ost->source_index              = -1;
4332         ost->attachment_filename       = o->attachments[i];
4333         ost->st->codec->extradata      = attachment;
4334         ost->st->codec->extradata_size = len;
4335
4336         p = strrchr(o->attachments[i], '/');
4337         av_dict_set(&ost->st->metadata, "filename", (p && *p) ? p + 1 : o->attachments[i], AV_DICT_DONT_OVERWRITE);
4338         avio_close(pb);
4339     }
4340
4341     output_files = grow_array(output_files, sizeof(*output_files), &nb_output_files, nb_output_files + 1);
4342     if (!(output_files[nb_output_files - 1] = av_mallocz(sizeof(*output_files[0]))))
4343         exit_program(1);
4344
4345     output_files[nb_output_files - 1]->ctx            = oc;
4346     output_files[nb_output_files - 1]->ost_index      = nb_output_streams - oc->nb_streams;
4347     output_files[nb_output_files - 1]->recording_time = o->recording_time;
4348     if (o->recording_time != INT64_MAX)
4349         oc->duration = o->recording_time;
4350     output_files[nb_output_files - 1]->start_time     = o->start_time;
4351     output_files[nb_output_files - 1]->limit_filesize = o->limit_filesize;
4352     av_dict_copy(&output_files[nb_output_files - 1]->opts, format_opts, 0);
4353
4354     /* check filename in case of an image number is expected */
4355     if (oc->oformat->flags & AVFMT_NEEDNUMBER) {
4356         if (!av_filename_number_test(oc->filename)) {
4357             print_error(oc->filename, AVERROR(EINVAL));
4358             exit_program(1);
4359         }
4360     }
4361
4362     if (!(oc->oformat->flags & AVFMT_NOFILE)) {
4363         /* test if it already exists to avoid losing precious files */
4364         assert_file_overwrite(filename);
4365
4366         /* open the file */