avconv: Display the error returned by avformat_write_header
[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 #include <time.h>
73
74 #include "cmdutils.h"
75
76 #include "libavutil/avassert.h"
77
78 #define VSYNC_AUTO       -1
79 #define VSYNC_PASSTHROUGH 0
80 #define VSYNC_CFR         1
81 #define VSYNC_VFR         2
82
83 const char program_name[] = "avconv";
84 const int program_birth_year = 2000;
85
86 /* select an input stream for an output stream */
87 typedef struct StreamMap {
88     int disabled;           /** 1 is this mapping is disabled by a negative map */
89     int file_index;
90     int stream_index;
91     int sync_file_index;
92     int sync_stream_index;
93     char *linklabel;       /** name of an output link, for mapping lavfi outputs */
94 } StreamMap;
95
96 /**
97  * select an input file for an output file
98  */
99 typedef struct MetadataMap {
100     int  file;      ///< file index
101     char type;      ///< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
102     int  index;     ///< stream/chapter/program number
103 } MetadataMap;
104
105 static const OptionDef options[];
106
107 static int video_discard = 0;
108 static int same_quant = 0;
109 static int do_deinterlace = 0;
110 static int intra_dc_precision = 8;
111 static int qp_hist = 0;
112
113 static int file_overwrite = 0;
114 static int do_benchmark = 0;
115 static int do_hex_dump = 0;
116 static int do_pkt_dump = 0;
117 static int do_pass = 0;
118 static char *pass_logfilename_prefix = NULL;
119 static int video_sync_method = VSYNC_AUTO;
120 static int audio_sync_method = 0;
121 static float audio_drift_threshold = 0.1;
122 static int copy_ts = 0;
123 static int copy_tb = 1;
124 static int opt_shortest = 0;
125 static char *vstats_filename;
126 static FILE *vstats_file;
127
128 static int audio_volume = 256;
129
130 static int exit_on_error = 0;
131 static int using_stdin = 0;
132 static int64_t video_size = 0;
133 static int64_t audio_size = 0;
134 static int64_t extra_size = 0;
135 static int nb_frames_dup = 0;
136 static int nb_frames_drop = 0;
137 static int input_sync;
138
139 static float dts_delta_threshold = 10;
140
141 static int print_stats = 1;
142
143 #define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
144
145 typedef struct InputFilter {
146     AVFilterContext    *filter;
147     struct InputStream *ist;
148     struct FilterGraph *graph;
149 } InputFilter;
150
151 typedef struct OutputFilter {
152     AVFilterContext     *filter;
153     struct OutputStream *ost;
154     struct FilterGraph  *graph;
155
156     /* temporary storage until stream maps are processed */
157     AVFilterInOut       *out_tmp;
158 } OutputFilter;
159
160 typedef struct FilterGraph {
161     int            index;
162     const char    *graph_desc;
163
164     AVFilterGraph *graph;
165
166     InputFilter   **inputs;
167     int          nb_inputs;
168     OutputFilter **outputs;
169     int         nb_outputs;
170 } FilterGraph;
171
172 typedef struct FrameBuffer {
173     uint8_t *base[4];
174     uint8_t *data[4];
175     int  linesize[4];
176
177     int h, w;
178     enum PixelFormat pix_fmt;
179
180     int refcount;
181     struct InputStream *ist;
182     struct FrameBuffer *next;
183 } FrameBuffer;
184
185 typedef struct InputStream {
186     int file_index;
187     AVStream *st;
188     int discard;             /* true if stream data should be discarded */
189     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
190     AVCodec *dec;
191     AVFrame *decoded_frame;
192
193     int64_t       start;     /* time when read started */
194     /* predicted dts of the next packet read for this stream or (when there are
195      * several frames in a packet) of the next frame in current packet */
196     int64_t       next_dts;
197     /* dts of the last packet read for this stream */
198     int64_t       last_dts;
199     PtsCorrectionContext pts_ctx;
200     double ts_scale;
201     int is_start;            /* is 1 at the start and after a discontinuity */
202     int showed_multi_packet_warning;
203     AVDictionary *opts;
204
205     int resample_height;
206     int resample_width;
207     int resample_pix_fmt;
208
209     int      resample_sample_fmt;
210     int      resample_sample_rate;
211     int      resample_channels;
212     uint64_t resample_channel_layout;
213
214     /* a pool of free buffers for decoded data */
215     FrameBuffer *buffer_pool;
216
217     /* decoded data from this stream goes into all those filters
218      * currently video and audio only */
219     InputFilter **filters;
220     int        nb_filters;
221 } InputStream;
222
223 typedef struct InputFile {
224     AVFormatContext *ctx;
225     int eof_reached;      /* true if eof reached */
226     int ist_index;        /* index of first stream in ist_table */
227     int buffer_size;      /* current total buffer size */
228     int64_t ts_offset;
229     int nb_streams;       /* number of stream that avconv is aware of; may be different
230                              from ctx.nb_streams if new streams appear during av_read_frame() */
231     int rate_emu;
232 } InputFile;
233
234 typedef struct OutputStream {
235     int file_index;          /* file index */
236     int index;               /* stream index in the output file */
237     int source_index;        /* InputStream index */
238     AVStream *st;            /* stream in the output file */
239     int encoding_needed;     /* true if encoding needed for this stream */
240     int frame_number;
241     /* input pts and corresponding output pts
242        for A/V sync */
243     // double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
244     struct InputStream *sync_ist; /* input stream to sync against */
245     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
246     /* pts of the first frame encoded for this stream, used for limiting
247      * recording time */
248     int64_t first_pts;
249     AVBitStreamFilterContext *bitstream_filters;
250     AVCodec *enc;
251     int64_t max_frames;
252     AVFrame *filtered_frame;
253
254     /* video only */
255     AVRational frame_rate;
256     int force_fps;
257     int top_field_first;
258
259     float frame_aspect_ratio;
260     float last_quality;
261
262     /* forced key frames */
263     int64_t *forced_kf_pts;
264     int forced_kf_count;
265     int forced_kf_index;
266
267     FILE *logfile;
268
269     OutputFilter *filter;
270     char *avfilter;
271
272     int64_t sws_flags;
273     AVDictionary *opts;
274     int is_past_recording_time;
275     int stream_copy;
276     const char *attachment_filename;
277     int copy_initial_nonkeyframes;
278
279     enum PixelFormat pix_fmts[2];
280 } OutputStream;
281
282
283 typedef struct OutputFile {
284     AVFormatContext *ctx;
285     AVDictionary *opts;
286     int ost_index;       /* index of the first stream in output_streams */
287     int64_t recording_time; /* desired length of the resulting file in microseconds */
288     int64_t start_time;     /* start time in microseconds */
289     uint64_t limit_filesize;
290 } OutputFile;
291
292 static InputStream **input_streams = NULL;
293 static int        nb_input_streams = 0;
294 static InputFile   **input_files   = NULL;
295 static int        nb_input_files   = 0;
296
297 static OutputStream **output_streams = NULL;
298 static int         nb_output_streams = 0;
299 static OutputFile   **output_files   = NULL;
300 static int         nb_output_files   = 0;
301
302 static FilterGraph **filtergraphs;
303 int               nb_filtergraphs;
304
305 typedef struct OptionsContext {
306     /* input/output options */
307     int64_t start_time;
308     const char *format;
309
310     SpecifierOpt *codec_names;
311     int        nb_codec_names;
312     SpecifierOpt *audio_channels;
313     int        nb_audio_channels;
314     SpecifierOpt *audio_sample_rate;
315     int        nb_audio_sample_rate;
316     SpecifierOpt *frame_rates;
317     int        nb_frame_rates;
318     SpecifierOpt *frame_sizes;
319     int        nb_frame_sizes;
320     SpecifierOpt *frame_pix_fmts;
321     int        nb_frame_pix_fmts;
322
323     /* input options */
324     int64_t input_ts_offset;
325     int rate_emu;
326
327     SpecifierOpt *ts_scale;
328     int        nb_ts_scale;
329     SpecifierOpt *dump_attachment;
330     int        nb_dump_attachment;
331
332     /* output options */
333     StreamMap *stream_maps;
334     int     nb_stream_maps;
335     /* first item specifies output metadata, second is input */
336     MetadataMap (*meta_data_maps)[2];
337     int nb_meta_data_maps;
338     int metadata_global_manual;
339     int metadata_streams_manual;
340     int metadata_chapters_manual;
341     const char **attachments;
342     int       nb_attachments;
343
344     int chapters_input_file;
345
346     int64_t recording_time;
347     uint64_t limit_filesize;
348     float mux_preload;
349     float mux_max_delay;
350
351     int video_disable;
352     int audio_disable;
353     int subtitle_disable;
354     int data_disable;
355
356     /* indexed by output file stream index */
357     int   *streamid_map;
358     int nb_streamid_map;
359
360     SpecifierOpt *metadata;
361     int        nb_metadata;
362     SpecifierOpt *max_frames;
363     int        nb_max_frames;
364     SpecifierOpt *bitstream_filters;
365     int        nb_bitstream_filters;
366     SpecifierOpt *codec_tags;
367     int        nb_codec_tags;
368     SpecifierOpt *sample_fmts;
369     int        nb_sample_fmts;
370     SpecifierOpt *qscale;
371     int        nb_qscale;
372     SpecifierOpt *forced_key_frames;
373     int        nb_forced_key_frames;
374     SpecifierOpt *force_fps;
375     int        nb_force_fps;
376     SpecifierOpt *frame_aspect_ratios;
377     int        nb_frame_aspect_ratios;
378     SpecifierOpt *rc_overrides;
379     int        nb_rc_overrides;
380     SpecifierOpt *intra_matrices;
381     int        nb_intra_matrices;
382     SpecifierOpt *inter_matrices;
383     int        nb_inter_matrices;
384     SpecifierOpt *top_field_first;
385     int        nb_top_field_first;
386     SpecifierOpt *metadata_map;
387     int        nb_metadata_map;
388     SpecifierOpt *presets;
389     int        nb_presets;
390     SpecifierOpt *copy_initial_nonkeyframes;
391     int        nb_copy_initial_nonkeyframes;
392     SpecifierOpt *filters;
393     int        nb_filters;
394 } OptionsContext;
395
396 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
397 {\
398     int i, ret;\
399     for (i = 0; i < o->nb_ ## name; i++) {\
400         char *spec = o->name[i].specifier;\
401         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
402             outvar = o->name[i].u.type;\
403         else if (ret < 0)\
404             exit_program(1);\
405     }\
406 }
407
408 static void reset_options(OptionsContext *o)
409 {
410     const OptionDef *po = options;
411     int i;
412
413     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
414     while (po->name) {
415         void *dst = (uint8_t*)o + po->u.off;
416
417         if (po->flags & OPT_SPEC) {
418             SpecifierOpt **so = dst;
419             int i, *count = (int*)(so + 1);
420             for (i = 0; i < *count; i++) {
421                 av_freep(&(*so)[i].specifier);
422                 if (po->flags & OPT_STRING)
423                     av_freep(&(*so)[i].u.str);
424             }
425             av_freep(so);
426             *count = 0;
427         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
428             av_freep(dst);
429         po++;
430     }
431
432     for (i = 0; i < o->nb_stream_maps; i++)
433         av_freep(&o->stream_maps[i].linklabel);
434     av_freep(&o->stream_maps);
435     av_freep(&o->meta_data_maps);
436     av_freep(&o->streamid_map);
437
438     memset(o, 0, sizeof(*o));
439
440     o->mux_max_delay  = 0.7;
441     o->recording_time = INT64_MAX;
442     o->limit_filesize = UINT64_MAX;
443     o->chapters_input_file = INT_MAX;
444
445     uninit_opts();
446     init_opts();
447 }
448
449 static int alloc_buffer(InputStream *ist, AVCodecContext *s, FrameBuffer **pbuf)
450 {
451     FrameBuffer  *buf = av_mallocz(sizeof(*buf));
452     int i, ret;
453     const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
454     int h_chroma_shift, v_chroma_shift;
455     int edge = 32; // XXX should be avcodec_get_edge_width(), but that fails on svq1
456     int w = s->width, h = s->height;
457
458     if (!buf)
459         return AVERROR(ENOMEM);
460
461     if (!(s->flags & CODEC_FLAG_EMU_EDGE)) {
462         w += 2*edge;
463         h += 2*edge;
464     }
465
466     avcodec_align_dimensions(s, &w, &h);
467     if ((ret = av_image_alloc(buf->base, buf->linesize, w, h,
468                               s->pix_fmt, 32)) < 0) {
469         av_freep(&buf);
470         return ret;
471     }
472     /* XXX this shouldn't be needed, but some tests break without this line
473      * those decoders are buggy and need to be fixed.
474      * the following tests fail:
475      * cdgraphics, ansi, aasc, fraps-v1, qtrle-1bit
476      */
477     memset(buf->base[0], 128, ret);
478
479     avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
480     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
481         const int h_shift = i==0 ? 0 : h_chroma_shift;
482         const int v_shift = i==0 ? 0 : v_chroma_shift;
483         if (s->flags & CODEC_FLAG_EMU_EDGE)
484             buf->data[i] = buf->base[i];
485         else
486             buf->data[i] = buf->base[i] +
487                            FFALIGN((buf->linesize[i]*edge >> v_shift) +
488                                    (pixel_size*edge >> h_shift), 32);
489     }
490     buf->w       = s->width;
491     buf->h       = s->height;
492     buf->pix_fmt = s->pix_fmt;
493     buf->ist     = ist;
494
495     *pbuf = buf;
496     return 0;
497 }
498
499 static void free_buffer_pool(InputStream *ist)
500 {
501     FrameBuffer *buf = ist->buffer_pool;
502     while (buf) {
503         ist->buffer_pool = buf->next;
504         av_freep(&buf->base[0]);
505         av_free(buf);
506         buf = ist->buffer_pool;
507     }
508 }
509
510 static void unref_buffer(InputStream *ist, FrameBuffer *buf)
511 {
512     av_assert0(buf->refcount);
513     buf->refcount--;
514     if (!buf->refcount) {
515         buf->next = ist->buffer_pool;
516         ist->buffer_pool = buf;
517     }
518 }
519
520 static int codec_get_buffer(AVCodecContext *s, AVFrame *frame)
521 {
522     InputStream *ist = s->opaque;
523     FrameBuffer *buf;
524     int ret, i;
525
526     if (!ist->buffer_pool && (ret = alloc_buffer(ist, s, &ist->buffer_pool)) < 0)
527         return ret;
528
529     buf              = ist->buffer_pool;
530     ist->buffer_pool = buf->next;
531     buf->next        = NULL;
532     if (buf->w != s->width || buf->h != s->height || buf->pix_fmt != s->pix_fmt) {
533         av_freep(&buf->base[0]);
534         av_free(buf);
535         if ((ret = alloc_buffer(ist, s, &buf)) < 0)
536             return ret;
537     }
538     buf->refcount++;
539
540     frame->opaque        = buf;
541     frame->type          = FF_BUFFER_TYPE_USER;
542     frame->extended_data = frame->data;
543     frame->pkt_pts       = s->pkt ? s->pkt->pts : AV_NOPTS_VALUE;
544     frame->width         = buf->w;
545     frame->height        = buf->h;
546     frame->format        = buf->pix_fmt;
547     frame->sample_aspect_ratio = s->sample_aspect_ratio;
548
549     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
550         frame->base[i]     = buf->base[i];  // XXX h264.c uses base though it shouldn't
551         frame->data[i]     = buf->data[i];
552         frame->linesize[i] = buf->linesize[i];
553     }
554
555     return 0;
556 }
557
558 static void codec_release_buffer(AVCodecContext *s, AVFrame *frame)
559 {
560     InputStream *ist = s->opaque;
561     FrameBuffer *buf = frame->opaque;
562     int i;
563
564     for (i = 0; i < FF_ARRAY_ELEMS(frame->data); i++)
565         frame->data[i] = NULL;
566
567     unref_buffer(ist, buf);
568 }
569
570 static void filter_release_buffer(AVFilterBuffer *fb)
571 {
572     FrameBuffer *buf = fb->priv;
573     av_free(fb);
574     unref_buffer(buf->ist, buf);
575 }
576
577 /**
578  * Define a function for building a string containing a list of
579  * allowed formats,
580  */
581 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator) \
582 static char *choose_ ## var ## s(OutputStream *ost)                             \
583 {                                                                               \
584     if (ost->st->codec->var != none) {                                          \
585         get_name(ost->st->codec->var);                                          \
586         return av_strdup(name);                                                 \
587     } else if (ost->enc->supported_list) {                                      \
588         const type *p;                                                          \
589         AVIOContext *s = NULL;                                                  \
590         uint8_t *ret;                                                           \
591         int len;                                                                \
592                                                                                 \
593         if (avio_open_dyn_buf(&s) < 0)                                          \
594             exit_program(1);                                                    \
595                                                                                 \
596         for (p = ost->enc->supported_list; *p != none; p++) {                   \
597             get_name(*p);                                                       \
598             avio_printf(s, "%s" separator, name);                               \
599         }                                                                       \
600         len = avio_close_dyn_buf(s, &ret);                                      \
601         ret[len - 1] = 0;                                                       \
602         return ret;                                                             \
603     } else                                                                      \
604         return NULL;                                                            \
605 }
606
607 #define GET_PIX_FMT_NAME(pix_fmt)\
608     const char *name = av_get_pix_fmt_name(pix_fmt);
609
610 DEF_CHOOSE_FORMAT(enum PixelFormat, pix_fmt, pix_fmts, PIX_FMT_NONE,
611                   GET_PIX_FMT_NAME, ":")
612
613 #define GET_SAMPLE_FMT_NAME(sample_fmt)\
614     const char *name = av_get_sample_fmt_name(sample_fmt)
615
616 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
617                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME, ",")
618
619 #define GET_SAMPLE_RATE_NAME(rate)\
620     char name[16];\
621     snprintf(name, sizeof(name), "%d", rate);
622
623 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
624                   GET_SAMPLE_RATE_NAME, ",")
625
626 #define GET_CH_LAYOUT_NAME(ch_layout)\
627     char name[16];\
628     snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
629
630 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
631                   GET_CH_LAYOUT_NAME, ",")
632
633 static int configure_audio_filters(FilterGraph *fg, AVFilterContext **in_filter,
634                                    AVFilterContext **out_filter)
635 {
636     InputStream  *ist = fg->inputs[0]->ist;
637     OutputStream *ost = fg->outputs[0]->ost;
638     AVCodecContext *codec  = ost->st->codec;
639     AVCodecContext *icodec = ist->st->codec;
640     char *sample_fmts, *sample_rates, *channel_layouts;
641     char args[256];
642     int ret;
643
644     avfilter_graph_free(&fg->graph);
645     if (!(fg->graph = avfilter_graph_alloc()))
646         return AVERROR(ENOMEM);
647
648     snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s:"
649              "channel_layout=0x%"PRIx64, ist->st->time_base.num,
650              ist->st->time_base.den, icodec->sample_rate,
651              av_get_sample_fmt_name(icodec->sample_fmt), icodec->channel_layout);
652     ret = avfilter_graph_create_filter(&fg->inputs[0]->filter,
653                                        avfilter_get_by_name("abuffer"),
654                                        "src", args, NULL, fg->graph);
655     if (ret < 0)
656         return ret;
657
658     ret = avfilter_graph_create_filter(&fg->outputs[0]->filter,
659                                        avfilter_get_by_name("abuffersink"),
660                                        "out", NULL, NULL, fg->graph);
661     if (ret < 0)
662         return ret;
663
664     *in_filter  = fg->inputs[0]->filter;
665     *out_filter = fg->outputs[0]->filter;
666
667     if (codec->channels && !codec->channel_layout)
668         codec->channel_layout = av_get_default_channel_layout(codec->channels);
669
670     sample_fmts     = choose_sample_fmts(ost);
671     sample_rates    = choose_sample_rates(ost);
672     channel_layouts = choose_channel_layouts(ost);
673     if (sample_fmts || sample_rates || channel_layouts) {
674         AVFilterContext *format;
675         char args[256];
676         int len = 0;
677
678         if (sample_fmts)
679             len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
680                             sample_fmts);
681         if (sample_rates)
682             len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
683                             sample_rates);
684         if (channel_layouts)
685             len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
686                             channel_layouts);
687         args[len - 1] = 0;
688
689         av_freep(&sample_fmts);
690         av_freep(&sample_rates);
691         av_freep(&channel_layouts);
692
693         ret = avfilter_graph_create_filter(&format,
694                                            avfilter_get_by_name("aformat"),
695                                            "aformat", args, NULL, fg->graph);
696         if (ret < 0)
697             return ret;
698
699         ret = avfilter_link(format, 0, fg->outputs[0]->filter, 0);
700         if (ret < 0)
701             return ret;
702
703         *out_filter = format;
704     }
705
706     if (audio_sync_method > 0) {
707         AVFilterContext *async;
708         char args[256];
709         int  len = 0;
710
711         av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
712                "asyncts audio filter instead.\n");
713
714         if (audio_sync_method > 1)
715             len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
716                             "max_comp=%d:", audio_sync_method);
717         snprintf(args + len, sizeof(args) - len, "min_delta=%f",
718                  audio_drift_threshold);
719
720         ret = avfilter_graph_create_filter(&async,
721                                            avfilter_get_by_name("asyncts"),
722                                            "async", args, NULL, fg->graph);
723         if (ret < 0)
724             return ret;
725
726         ret = avfilter_link(*in_filter, 0, async, 0);
727         if (ret < 0)
728             return ret;
729
730         *in_filter = async;
731     }
732
733     return 0;
734 }
735
736 static int configure_video_filters(FilterGraph *fg, AVFilterContext **in_filter,
737                                    AVFilterContext **out_filter)
738 {
739     InputStream  *ist = fg->inputs[0]->ist;
740     OutputStream *ost = fg->outputs[0]->ost;
741     AVFilterContext *filter;
742     AVCodecContext *codec = ost->st->codec;
743     char *pix_fmts;
744     AVRational sample_aspect_ratio;
745     char args[255];
746     int ret;
747
748     if (ist->st->sample_aspect_ratio.num) {
749         sample_aspect_ratio = ist->st->sample_aspect_ratio;
750     } else
751         sample_aspect_ratio = ist->st->codec->sample_aspect_ratio;
752
753     snprintf(args, 255, "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
754              ist->st->codec->height, ist->st->codec->pix_fmt,
755              ist->st->time_base.num, ist->st->time_base.den,
756              sample_aspect_ratio.num, sample_aspect_ratio.den);
757
758     ret = avfilter_graph_create_filter(&fg->inputs[0]->filter,
759                                        avfilter_get_by_name("buffer"),
760                                        "src", args, NULL, fg->graph);
761     if (ret < 0)
762         return ret;
763     ret = avfilter_graph_create_filter(&fg->outputs[0]->filter,
764                                        avfilter_get_by_name("buffersink"),
765                                        "out", NULL, NULL, fg->graph);
766     if (ret < 0)
767         return ret;
768     *in_filter  = fg->inputs[0]->filter;
769     *out_filter = fg->outputs[0]->filter;
770
771     if (codec->width || codec->height) {
772         snprintf(args, 255, "%d:%d:flags=0x%X",
773                  codec->width,
774                  codec->height,
775                  (unsigned)ost->sws_flags);
776         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
777                                                 NULL, args, NULL, fg->graph)) < 0)
778             return ret;
779         if ((ret = avfilter_link(*in_filter, 0, filter, 0)) < 0)
780             return ret;
781         *in_filter = filter;
782     }
783
784     if (ost->frame_rate.num) {
785         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
786                  ost->frame_rate.den);
787         ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("fps"),
788                                            "fps", args, NULL, fg->graph);
789         if (ret < 0)
790             return ret;
791
792         ret = avfilter_link(filter, 0, *out_filter, 0);
793         if (ret < 0)
794             return ret;
795         *out_filter = filter;
796     }
797
798     if ((pix_fmts = choose_pix_fmts(ost))) {
799         if ((ret = avfilter_graph_create_filter(&filter,
800                                                 avfilter_get_by_name("format"),
801                                                 "format", pix_fmts, NULL,
802                                                 fg->graph)) < 0)
803             return ret;
804         if ((ret = avfilter_link(filter, 0, *out_filter, 0)) < 0)
805             return ret;
806
807         *out_filter = filter;
808         av_freep(&pix_fmts);
809     }
810
811     snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
812     fg->graph->scale_sws_opts = av_strdup(args);
813
814     return 0;
815 }
816
817 static int configure_simple_filtergraph(FilterGraph *fg)
818 {
819     OutputStream *ost = fg->outputs[0]->ost;
820     AVFilterContext *in_filter, *out_filter;
821     int ret;
822
823     avfilter_graph_free(&fg->graph);
824     fg->graph = avfilter_graph_alloc();
825
826     switch (ost->st->codec->codec_type) {
827     case AVMEDIA_TYPE_VIDEO:
828         ret = configure_video_filters(fg, &in_filter, &out_filter);
829         break;
830     case AVMEDIA_TYPE_AUDIO:
831         ret = configure_audio_filters(fg, &in_filter, &out_filter);
832         break;
833     default: av_assert0(0);
834     }
835     if (ret < 0)
836         return ret;
837
838     if (ost->avfilter) {
839         AVFilterInOut *outputs = avfilter_inout_alloc();
840         AVFilterInOut *inputs  = avfilter_inout_alloc();
841
842         outputs->name    = av_strdup("in");
843         outputs->filter_ctx = in_filter;
844         outputs->pad_idx = 0;
845         outputs->next    = NULL;
846
847         inputs->name    = av_strdup("out");
848         inputs->filter_ctx = out_filter;
849         inputs->pad_idx = 0;
850         inputs->next    = NULL;
851
852         if ((ret = avfilter_graph_parse(fg->graph, ost->avfilter, inputs, outputs, NULL)) < 0)
853             return ret;
854     } else {
855         if ((ret = avfilter_link(in_filter, 0, out_filter, 0)) < 0)
856             return ret;
857     }
858
859     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
860         return ret;
861
862     ost->filter = fg->outputs[0];
863
864     return 0;
865 }
866
867 static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
868 {
869     FilterGraph *fg = av_mallocz(sizeof(*fg));
870
871     if (!fg)
872         exit_program(1);
873     fg->index = nb_filtergraphs;
874
875     fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
876                              fg->nb_outputs + 1);
877     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
878         exit_program(1);
879     fg->outputs[0]->ost   = ost;
880     fg->outputs[0]->graph = fg;
881
882     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
883                             fg->nb_inputs + 1);
884     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
885         exit_program(1);
886     fg->inputs[0]->ist   = ist;
887     fg->inputs[0]->graph = fg;
888
889     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
890                               &ist->nb_filters, ist->nb_filters + 1);
891     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
892
893     filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
894                               &nb_filtergraphs, nb_filtergraphs + 1);
895     filtergraphs[nb_filtergraphs - 1] = fg;
896
897     return fg;
898 }
899
900 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
901 {
902     InputStream *ist;
903     enum AVMediaType type = in->filter_ctx->input_pads[in->pad_idx].type;
904     int i;
905
906     // TODO: support other filter types
907     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
908         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
909                "currently.\n");
910         exit_program(1);
911     }
912
913     if (in->name) {
914         AVFormatContext *s;
915         AVStream       *st = NULL;
916         char *p;
917         int file_idx = strtol(in->name, &p, 0);
918
919         if (file_idx < 0 || file_idx >= nb_input_files) {
920             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtegraph description %s.\n",
921                    file_idx, fg->graph_desc);
922             exit_program(1);
923         }
924         s = input_files[file_idx]->ctx;
925
926         for (i = 0; i < s->nb_streams; i++) {
927             if (s->streams[i]->codec->codec_type != type)
928                 continue;
929             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
930                 st = s->streams[i];
931                 break;
932             }
933         }
934         if (!st) {
935             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
936                    "matches no streams.\n", p, fg->graph_desc);
937             exit_program(1);
938         }
939         ist = input_streams[input_files[file_idx]->ist_index + st->index];
940     } else {
941         /* find the first unused stream of corresponding type */
942         for (i = 0; i < nb_input_streams; i++) {
943             ist = input_streams[i];
944             if (ist->st->codec->codec_type == type && ist->discard)
945                 break;
946         }
947         if (i == nb_input_streams) {
948             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
949                    "unlabeled input pad %d on filter %s", in->pad_idx,
950                    in->filter_ctx->name);
951             exit_program(1);
952         }
953     }
954     ist->discard         = 0;
955     ist->decoding_needed = 1;
956     ist->st->discard = AVDISCARD_NONE;
957
958     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
959                             &fg->nb_inputs, fg->nb_inputs + 1);
960     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
961         exit_program(1);
962     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
963     fg->inputs[fg->nb_inputs - 1]->graph = fg;
964
965     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
966                               &ist->nb_filters, ist->nb_filters + 1);
967     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
968 }
969
970 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
971 {
972     char *pix_fmts;
973     AVCodecContext *codec = ofilter->ost->st->codec;
974     AVFilterContext *last_filter = out->filter_ctx;
975     int pad_idx = out->pad_idx;
976     int ret;
977
978
979     ret = avfilter_graph_create_filter(&ofilter->filter,
980                                        avfilter_get_by_name("buffersink"),
981                                        "out", NULL, pix_fmts, fg->graph);
982     if (ret < 0)
983         return ret;
984
985     if (codec->width || codec->height) {
986         char args[255];
987         AVFilterContext *filter;
988
989         snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
990                  codec->width,
991                  codec->height,
992                  (unsigned)ofilter->ost->sws_flags);
993         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
994                                                 NULL, args, NULL, fg->graph)) < 0)
995             return ret;
996         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
997             return ret;
998
999         last_filter = filter;
1000         pad_idx = 0;
1001     }
1002
1003     if ((pix_fmts = choose_pix_fmts(ofilter->ost))) {
1004         AVFilterContext *filter;
1005         if ((ret = avfilter_graph_create_filter(&filter,
1006                                                 avfilter_get_by_name("format"),
1007                                                 "format", pix_fmts, NULL,
1008                                                 fg->graph)) < 0)
1009             return ret;
1010         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
1011             return ret;
1012
1013         last_filter = filter;
1014         pad_idx     = 0;
1015         av_freep(&pix_fmts);
1016     }
1017
1018     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
1019         return ret;
1020
1021     return 0;
1022 }
1023
1024 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
1025 {
1026     OutputStream *ost = ofilter->ost;
1027     AVCodecContext *codec  = ost->st->codec;
1028     AVFilterContext *last_filter = out->filter_ctx;
1029     int pad_idx = out->pad_idx;
1030     char *sample_fmts, *sample_rates, *channel_layouts;
1031     int ret;
1032
1033     ret = avfilter_graph_create_filter(&ofilter->filter,
1034                                        avfilter_get_by_name("abuffersink"),
1035                                        "out", NULL, NULL, fg->graph);
1036     if (ret < 0)
1037         return ret;
1038
1039     if (codec->channels && !codec->channel_layout)
1040         codec->channel_layout = av_get_default_channel_layout(codec->channels);
1041
1042     sample_fmts     = choose_sample_fmts(ost);
1043     sample_rates    = choose_sample_rates(ost);
1044     channel_layouts = choose_channel_layouts(ost);
1045     if (sample_fmts || sample_rates || channel_layouts) {
1046         AVFilterContext *format;
1047         char args[256];
1048         int len = 0;
1049
1050         if (sample_fmts)
1051             len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
1052                             sample_fmts);
1053         if (sample_rates)
1054             len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
1055                             sample_rates);
1056         if (channel_layouts)
1057             len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
1058                             channel_layouts);
1059         args[len - 1] = 0;
1060
1061         av_freep(&sample_fmts);
1062         av_freep(&sample_rates);
1063         av_freep(&channel_layouts);
1064
1065         ret = avfilter_graph_create_filter(&format,
1066                                            avfilter_get_by_name("aformat"),
1067                                            "aformat", args, NULL, fg->graph);
1068         if (ret < 0)
1069             return ret;
1070
1071         ret = avfilter_link(last_filter, pad_idx, format, 0);
1072         if (ret < 0)
1073             return ret;
1074
1075         last_filter = format;
1076         pad_idx = 0;
1077     }
1078
1079     if (audio_sync_method > 0) {
1080         AVFilterContext *async;
1081         char args[256];
1082         int  len = 0;
1083
1084         av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
1085                "asyncts audio filter instead.\n");
1086
1087         if (audio_sync_method > 1)
1088             len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
1089                             "max_comp=%d:", audio_sync_method);
1090         snprintf(args + len, sizeof(args) - len, "min_delta=%f",
1091                  audio_drift_threshold);
1092
1093         ret = avfilter_graph_create_filter(&async,
1094                                            avfilter_get_by_name("asyncts"),
1095                                            "async", args, NULL, fg->graph);
1096         if (ret < 0)
1097             return ret;
1098
1099         ret = avfilter_link(last_filter, pad_idx, async, 0);
1100         if (ret < 0)
1101             return ret;
1102
1103         last_filter = async;
1104         pad_idx = 0;
1105     }
1106
1107     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
1108         return ret;
1109
1110     return 0;
1111 }
1112
1113 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
1114 {
1115     switch (out->filter_ctx->output_pads[out->pad_idx].type) {
1116     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
1117     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
1118     default: av_assert0(0);
1119     }
1120 }
1121
1122 static int configure_complex_filter(FilterGraph *fg)
1123 {
1124     AVFilterInOut *inputs, *outputs, *cur;
1125     int ret, i, init = !fg->graph;
1126
1127     avfilter_graph_free(&fg->graph);
1128     if (!(fg->graph = avfilter_graph_alloc()))
1129         return AVERROR(ENOMEM);
1130
1131     if ((ret = avfilter_graph_parse2(fg->graph, fg->graph_desc, &inputs, &outputs)) < 0)
1132         return ret;
1133
1134     for (cur = inputs; init && cur; cur = cur->next)
1135         init_input_filter(fg, cur);
1136
1137     for (cur = inputs, i = 0; cur; cur = cur->next, i++) {
1138         InputFilter *ifilter = fg->inputs[i];
1139         InputStream     *ist = ifilter->ist;
1140         AVRational       sar;
1141         AVFilter     *filter;
1142         char            args[255];
1143
1144         switch (cur->filter_ctx->input_pads[cur->pad_idx].type) {
1145         case AVMEDIA_TYPE_VIDEO:
1146             sar = ist->st->sample_aspect_ratio.num ?
1147                   ist->st->sample_aspect_ratio :
1148                   ist->st->codec->sample_aspect_ratio;
1149             snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
1150                      ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
1151                      sar.num, sar.den);
1152             filter = avfilter_get_by_name("buffer");
1153             break;
1154         case AVMEDIA_TYPE_AUDIO:
1155             snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:"
1156                      "sample_fmt=%s:channel_layout=0x%"PRIx64,
1157                      ist->st->time_base.num, ist->st->time_base.den,
1158                      ist->st->codec->sample_rate,
1159                      av_get_sample_fmt_name(ist->st->codec->sample_fmt),
1160                      ist->st->codec->channel_layout);
1161             filter = avfilter_get_by_name("abuffer");
1162             break;
1163         default:
1164             av_assert0(0);
1165         }
1166
1167         if ((ret = avfilter_graph_create_filter(&ifilter->filter,
1168                                                 filter, cur->name,
1169                                                 args, NULL, fg->graph)) < 0)
1170             return ret;
1171         if ((ret = avfilter_link(ifilter->filter, 0,
1172                                  cur->filter_ctx, cur->pad_idx)) < 0)
1173             return ret;
1174     }
1175     avfilter_inout_free(&inputs);
1176
1177     if (!init) {
1178         /* we already know the mappings between lavfi outputs and output streams,
1179          * so we can finish the setup */
1180         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1181             configure_output_filter(fg, fg->outputs[i], cur);
1182         avfilter_inout_free(&outputs);
1183
1184         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1185             return ret;
1186     } else {
1187         /* wait until output mappings are processed */
1188         for (cur = outputs; cur;) {
1189             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
1190                                      &fg->nb_outputs, fg->nb_outputs + 1);
1191             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
1192                 exit_program(1);
1193             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
1194             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
1195             cur = cur->next;
1196             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
1197         }
1198     }
1199
1200     return 0;
1201 }
1202
1203 static int configure_complex_filters(void)
1204 {
1205     int i, ret = 0;
1206
1207     for (i = 0; i < nb_filtergraphs; i++)
1208         if (!filtergraphs[i]->graph &&
1209             (ret = configure_complex_filter(filtergraphs[i])) < 0)
1210             return ret;
1211     return 0;
1212 }
1213
1214 static int configure_filtergraph(FilterGraph *fg)
1215 {
1216     return fg->graph_desc ? configure_complex_filter(fg) :
1217                             configure_simple_filtergraph(fg);
1218 }
1219
1220 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1221 {
1222     int i;
1223     for (i = 0; i < fg->nb_inputs; i++)
1224         if (fg->inputs[i]->ist == ist)
1225             return 1;
1226     return 0;
1227 }
1228
1229 static void term_exit(void)
1230 {
1231     av_log(NULL, AV_LOG_QUIET, "");
1232 }
1233
1234 static volatile int received_sigterm = 0;
1235 static volatile int received_nb_signals = 0;
1236
1237 static void
1238 sigterm_handler(int sig)
1239 {
1240     received_sigterm = sig;
1241     received_nb_signals++;
1242     term_exit();
1243 }
1244
1245 static void term_init(void)
1246 {
1247     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1248     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1249 #ifdef SIGXCPU
1250     signal(SIGXCPU, sigterm_handler);
1251 #endif
1252 }
1253
1254 static int decode_interrupt_cb(void *ctx)
1255 {
1256     return received_nb_signals > 1;
1257 }
1258
1259 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1260
1261 void exit_program(int ret)
1262 {
1263     int i, j;
1264
1265     for (i = 0; i < nb_filtergraphs; i++) {
1266         avfilter_graph_free(&filtergraphs[i]->graph);
1267         for (j = 0; j < filtergraphs[i]->nb_inputs; j++)
1268             av_freep(&filtergraphs[i]->inputs[j]);
1269         av_freep(&filtergraphs[i]->inputs);
1270         for (j = 0; j < filtergraphs[i]->nb_outputs; j++)
1271             av_freep(&filtergraphs[i]->outputs[j]);
1272         av_freep(&filtergraphs[i]->outputs);
1273         av_freep(&filtergraphs[i]);
1274     }
1275     av_freep(&filtergraphs);
1276
1277     /* close files */
1278     for (i = 0; i < nb_output_files; i++) {
1279         AVFormatContext *s = output_files[i]->ctx;
1280         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1281             avio_close(s->pb);
1282         avformat_free_context(s);
1283         av_dict_free(&output_files[i]->opts);
1284         av_freep(&output_files[i]);
1285     }
1286     for (i = 0; i < nb_output_streams; i++) {
1287         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1288         while (bsfc) {
1289             AVBitStreamFilterContext *next = bsfc->next;
1290             av_bitstream_filter_close(bsfc);
1291             bsfc = next;
1292         }
1293         output_streams[i]->bitstream_filters = NULL;
1294
1295         av_freep(&output_streams[i]->avfilter);
1296         av_freep(&output_streams[i]->filtered_frame);
1297         av_freep(&output_streams[i]);
1298     }
1299     for (i = 0; i < nb_input_files; i++) {
1300         avformat_close_input(&input_files[i]->ctx);
1301         av_freep(&input_files[i]);
1302     }
1303     for (i = 0; i < nb_input_streams; i++) {
1304         av_freep(&input_streams[i]->decoded_frame);
1305         av_dict_free(&input_streams[i]->opts);
1306         free_buffer_pool(input_streams[i]);
1307         av_freep(&input_streams[i]->filters);
1308         av_freep(&input_streams[i]);
1309     }
1310
1311     if (vstats_file)
1312         fclose(vstats_file);
1313     av_free(vstats_filename);
1314
1315     av_freep(&input_streams);
1316     av_freep(&input_files);
1317     av_freep(&output_streams);
1318     av_freep(&output_files);
1319
1320     uninit_opts();
1321
1322     avfilter_uninit();
1323     avformat_network_deinit();
1324
1325     if (received_sigterm) {
1326         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1327                (int) received_sigterm);
1328         exit (255);
1329     }
1330
1331     exit(ret);
1332 }
1333
1334 static void assert_avoptions(AVDictionary *m)
1335 {
1336     AVDictionaryEntry *t;
1337     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1338         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1339         exit_program(1);
1340     }
1341 }
1342
1343 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1344 {
1345     const char *codec_string = encoder ? "encoder" : "decoder";
1346     AVCodec *codec;
1347     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1348         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1349         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1350                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1351                 codec_string, c->codec->name);
1352         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1353         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1354             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1355                    codec_string, codec->name);
1356         exit_program(1);
1357     }
1358 }
1359
1360 /**
1361  * Update the requested input sample format based on the output sample format.
1362  * This is currently only used to request float output from decoders which
1363  * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
1364  * Ideally this will be removed in the future when decoders do not do format
1365  * conversion and only output in their native format.
1366  */
1367 static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
1368                               AVCodecContext *enc)
1369 {
1370     /* if sample formats match or a decoder sample format has already been
1371        requested, just return */
1372     if (enc->sample_fmt == dec->sample_fmt ||
1373         dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
1374         return;
1375
1376     /* if decoder supports more than one output format */
1377     if (dec_codec && dec_codec->sample_fmts &&
1378         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
1379         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
1380         const enum AVSampleFormat *p;
1381         int min_dec = -1, min_inc = -1;
1382
1383         /* find a matching sample format in the encoder */
1384         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
1385             if (*p == enc->sample_fmt) {
1386                 dec->request_sample_fmt = *p;
1387                 return;
1388             } else if (*p > enc->sample_fmt) {
1389                 min_inc = FFMIN(min_inc, *p - enc->sample_fmt);
1390             } else
1391                 min_dec = FFMIN(min_dec, enc->sample_fmt - *p);
1392         }
1393
1394         /* if none match, provide the one that matches quality closest */
1395         dec->request_sample_fmt = min_inc > 0 ? enc->sample_fmt + min_inc :
1396                                   enc->sample_fmt - min_dec;
1397     }
1398 }
1399
1400 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1401 {
1402     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1403     AVCodecContext          *avctx = ost->st->codec;
1404     int ret;
1405
1406     /*
1407      * Audio encoders may split the packets --  #frames in != #packets out.
1408      * But there is no reordering, so we can limit the number of output packets
1409      * by simply dropping them here.
1410      * Counting encoded video frames needs to be done separately because of
1411      * reordering, see do_video_out()
1412      */
1413     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1414         if (ost->frame_number >= ost->max_frames) {
1415             av_free_packet(pkt);
1416             return;
1417         }
1418         ost->frame_number++;
1419     }
1420
1421     while (bsfc) {
1422         AVPacket new_pkt = *pkt;
1423         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1424                                            &new_pkt.data, &new_pkt.size,
1425                                            pkt->data, pkt->size,
1426                                            pkt->flags & AV_PKT_FLAG_KEY);
1427         if (a > 0) {
1428             av_free_packet(pkt);
1429             new_pkt.destruct = av_destruct_packet;
1430         } else if (a < 0) {
1431             av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
1432                    bsfc->filter->name, pkt->stream_index,
1433                    avctx->codec ? avctx->codec->name : "copy");
1434             print_error("", a);
1435             if (exit_on_error)
1436                 exit_program(1);
1437         }
1438         *pkt = new_pkt;
1439
1440         bsfc = bsfc->next;
1441     }
1442
1443     pkt->stream_index = ost->index;
1444     ret = av_interleaved_write_frame(s, pkt);
1445     if (ret < 0) {
1446         print_error("av_interleaved_write_frame()", ret);
1447         exit_program(1);
1448     }
1449 }
1450
1451 static int check_recording_time(OutputStream *ost)
1452 {
1453     OutputFile *of = output_files[ost->file_index];
1454
1455     if (of->recording_time != INT64_MAX &&
1456         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
1457                       AV_TIME_BASE_Q) >= 0) {
1458         ost->is_past_recording_time = 1;
1459         return 0;
1460     }
1461     return 1;
1462 }
1463
1464 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1465                          AVFrame *frame)
1466 {
1467     AVCodecContext *enc = ost->st->codec;
1468     AVPacket pkt;
1469     int got_packet = 0;
1470
1471     av_init_packet(&pkt);
1472     pkt.data = NULL;
1473     pkt.size = 0;
1474
1475     if (!check_recording_time(ost))
1476         return;
1477
1478     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
1479         frame->pts = ost->sync_opts;
1480     ost->sync_opts = frame->pts + frame->nb_samples;
1481
1482     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1483         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
1484         exit_program(1);
1485     }
1486
1487     if (got_packet) {
1488         if (pkt.pts != AV_NOPTS_VALUE)
1489             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1490         if (pkt.dts != AV_NOPTS_VALUE)
1491             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1492         if (pkt.duration > 0)
1493             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1494
1495         write_frame(s, &pkt, ost);
1496
1497         audio_size += pkt.size;
1498     }
1499 }
1500
1501 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1502 {
1503     AVCodecContext *dec;
1504     AVPicture *picture2;
1505     AVPicture picture_tmp;
1506     uint8_t *buf = 0;
1507
1508     dec = ist->st->codec;
1509
1510     /* deinterlace : must be done before any resize */
1511     if (do_deinterlace) {
1512         int size;
1513
1514         /* create temporary picture */
1515         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1516         buf  = av_malloc(size);
1517         if (!buf)
1518             return;
1519
1520         picture2 = &picture_tmp;
1521         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1522
1523         if (avpicture_deinterlace(picture2, picture,
1524                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1525             /* if error, do not deinterlace */
1526             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1527             av_free(buf);
1528             buf = NULL;
1529             picture2 = picture;
1530         }
1531     } else {
1532         picture2 = picture;
1533     }
1534
1535     if (picture != picture2)
1536         *picture = *picture2;
1537     *bufp = buf;
1538 }
1539
1540 static void do_subtitle_out(AVFormatContext *s,
1541                             OutputStream *ost,
1542                             InputStream *ist,
1543                             AVSubtitle *sub,
1544                             int64_t pts)
1545 {
1546     static uint8_t *subtitle_out = NULL;
1547     int subtitle_out_max_size = 1024 * 1024;
1548     int subtitle_out_size, nb, i;
1549     AVCodecContext *enc;
1550     AVPacket pkt;
1551
1552     if (pts == AV_NOPTS_VALUE) {
1553         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1554         if (exit_on_error)
1555             exit_program(1);
1556         return;
1557     }
1558
1559     enc = ost->st->codec;
1560
1561     if (!subtitle_out) {
1562         subtitle_out = av_malloc(subtitle_out_max_size);
1563     }
1564
1565     /* Note: DVB subtitle need one packet to draw them and one other
1566        packet to clear them */
1567     /* XXX: signal it in the codec context ? */
1568     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1569         nb = 2;
1570     else
1571         nb = 1;
1572
1573     for (i = 0; i < nb; i++) {
1574         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1575         if (!check_recording_time(ost))
1576             return;
1577
1578         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1579         // start_display_time is required to be 0
1580         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1581         sub->end_display_time  -= sub->start_display_time;
1582         sub->start_display_time = 0;
1583         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1584                                                     subtitle_out_max_size, sub);
1585         if (subtitle_out_size < 0) {
1586             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1587             exit_program(1);
1588         }
1589
1590         av_init_packet(&pkt);
1591         pkt.data = subtitle_out;
1592         pkt.size = subtitle_out_size;
1593         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1594         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1595             /* XXX: the pts correction is handled here. Maybe handling
1596                it in the codec would be better */
1597             if (i == 0)
1598                 pkt.pts += 90 * sub->start_display_time;
1599             else
1600                 pkt.pts += 90 * sub->end_display_time;
1601         }
1602         write_frame(s, &pkt, ost);
1603     }
1604 }
1605
1606 static void do_video_out(AVFormatContext *s,
1607                          OutputStream *ost,
1608                          AVFrame *in_picture,
1609                          int *frame_size, float quality)
1610 {
1611     int ret, format_video_sync;
1612     AVPacket pkt;
1613     AVCodecContext *enc = ost->st->codec;
1614
1615     *frame_size = 0;
1616
1617     format_video_sync = video_sync_method;
1618     if (format_video_sync == VSYNC_AUTO)
1619         format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
1620                             (s->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
1621     if (format_video_sync != VSYNC_PASSTHROUGH &&
1622         ost->frame_number &&
1623         in_picture->pts != AV_NOPTS_VALUE &&
1624         in_picture->pts < ost->sync_opts) {
1625         nb_frames_drop++;
1626         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1627         return;
1628     }
1629
1630     if (in_picture->pts == AV_NOPTS_VALUE)
1631         in_picture->pts = ost->sync_opts;
1632     ost->sync_opts = in_picture->pts;
1633
1634
1635     if (!ost->frame_number)
1636         ost->first_pts = in_picture->pts;
1637
1638     av_init_packet(&pkt);
1639     pkt.data = NULL;
1640     pkt.size = 0;
1641
1642     if (!check_recording_time(ost) ||
1643         ost->frame_number >= ost->max_frames)
1644         return;
1645
1646     if (s->oformat->flags & AVFMT_RAWPICTURE &&
1647         enc->codec->id == CODEC_ID_RAWVIDEO) {
1648         /* raw pictures are written as AVPicture structure to
1649            avoid any copies. We support temporarily the older
1650            method. */
1651         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1652         enc->coded_frame->top_field_first  = in_picture->top_field_first;
1653         pkt.data   = (uint8_t *)in_picture;
1654         pkt.size   =  sizeof(AVPicture);
1655         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
1656         pkt.flags |= AV_PKT_FLAG_KEY;
1657
1658         write_frame(s, &pkt, ost);
1659     } else {
1660         int got_packet;
1661         AVFrame big_picture;
1662
1663         big_picture = *in_picture;
1664         /* better than nothing: use input picture interlaced
1665            settings */
1666         big_picture.interlaced_frame = in_picture->interlaced_frame;
1667         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1668             if (ost->top_field_first == -1)
1669                 big_picture.top_field_first = in_picture->top_field_first;
1670             else
1671                 big_picture.top_field_first = !!ost->top_field_first;
1672         }
1673
1674         /* handles same_quant here. This is not correct because it may
1675            not be a global option */
1676         big_picture.quality = quality;
1677         if (!enc->me_threshold)
1678             big_picture.pict_type = 0;
1679         if (ost->forced_kf_index < ost->forced_kf_count &&
1680             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1681             big_picture.pict_type = AV_PICTURE_TYPE_I;
1682             ost->forced_kf_index++;
1683         }
1684         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
1685         if (ret < 0) {
1686             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1687             exit_program(1);
1688         }
1689
1690         if (got_packet) {
1691             if (pkt.pts != AV_NOPTS_VALUE)
1692                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1693             if (pkt.dts != AV_NOPTS_VALUE)
1694                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1695
1696             write_frame(s, &pkt, ost);
1697             *frame_size = pkt.size;
1698             video_size += pkt.size;
1699
1700             /* if two pass, output log */
1701             if (ost->logfile && enc->stats_out) {
1702                 fprintf(ost->logfile, "%s", enc->stats_out);
1703             }
1704         }
1705     }
1706     ost->sync_opts++;
1707     /*
1708      * For video, number of frames in == number of packets out.
1709      * But there may be reordering, so we can't throw away frames on encoder
1710      * flush, we need to limit them here, before they go into encoder.
1711      */
1712     ost->frame_number++;
1713 }
1714
1715 static double psnr(double d)
1716 {
1717     return -10.0 * log(d) / log(10.0);
1718 }
1719
1720 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1721                            int frame_size)
1722 {
1723     AVCodecContext *enc;
1724     int frame_number;
1725     double ti1, bitrate, avg_bitrate;
1726
1727     /* this is executed just the first time do_video_stats is called */
1728     if (!vstats_file) {
1729         vstats_file = fopen(vstats_filename, "w");
1730         if (!vstats_file) {
1731             perror("fopen");
1732             exit_program(1);
1733         }
1734     }
1735
1736     enc = ost->st->codec;
1737     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1738         frame_number = ost->frame_number;
1739         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1740         if (enc->flags&CODEC_FLAG_PSNR)
1741             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1742
1743         fprintf(vstats_file,"f_size= %6d ", frame_size);
1744         /* compute pts value */
1745         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1746         if (ti1 < 0.01)
1747             ti1 = 0.01;
1748
1749         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1750         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1751         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1752                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1753         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1754     }
1755 }
1756
1757 /* check for new output on any of the filtergraphs */
1758 static int poll_filters(void)
1759 {
1760     AVFilterBufferRef *picref;
1761     AVFrame *filtered_frame = NULL;
1762     int i, frame_size;
1763
1764     for (i = 0; i < nb_output_streams; i++) {
1765         OutputStream *ost = output_streams[i];
1766         OutputFile    *of = output_files[ost->file_index];
1767         int ret = 0;
1768
1769         if (!ost->filter || ost->is_past_recording_time)
1770             continue;
1771
1772         if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
1773             return AVERROR(ENOMEM);
1774         } else
1775             avcodec_get_frame_defaults(ost->filtered_frame);
1776         filtered_frame = ost->filtered_frame;
1777
1778         while (ret >= 0) {
1779             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1780                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1781                 ret = av_buffersink_read_samples(ost->filter->filter, &picref,
1782                                                  ost->st->codec->frame_size);
1783             else
1784                 ret = av_buffersink_read(ost->filter->filter, &picref);
1785
1786             if (ret < 0)
1787                 break;
1788
1789             avfilter_copy_buf_props(filtered_frame, picref);
1790             if (picref->pts != AV_NOPTS_VALUE)
1791                 filtered_frame->pts = av_rescale_q(picref->pts,
1792                                                    ost->filter->filter->inputs[0]->time_base,
1793                                                    ost->st->codec->time_base) -
1794                                       av_rescale_q(of->start_time,
1795                                                    AV_TIME_BASE_Q,
1796                                                    ost->st->codec->time_base);
1797
1798             if (of->start_time && filtered_frame->pts < of->start_time) {
1799                 avfilter_unref_buffer(picref);
1800                 continue;
1801             }
1802
1803             switch (ost->filter->filter->inputs[0]->type) {
1804             case AVMEDIA_TYPE_VIDEO:
1805                 if (!ost->frame_aspect_ratio)
1806                     ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
1807
1808                 do_video_out(of->ctx, ost, filtered_frame, &frame_size,
1809                              same_quant ? ost->last_quality :
1810                                           ost->st->codec->global_quality);
1811                 if (vstats_filename && frame_size)
1812                     do_video_stats(of->ctx, ost, frame_size);
1813                 break;
1814             case AVMEDIA_TYPE_AUDIO:
1815                 do_audio_out(of->ctx, ost, filtered_frame);
1816                 break;
1817             default:
1818                 // TODO support subtitle filters
1819                 av_assert0(0);
1820             }
1821
1822             avfilter_unref_buffer(picref);
1823         }
1824     }
1825     return 0;
1826 }
1827
1828 static void print_report(int is_last_report, int64_t timer_start)
1829 {
1830     char buf[1024];
1831     OutputStream *ost;
1832     AVFormatContext *oc;
1833     int64_t total_size;
1834     AVCodecContext *enc;
1835     int frame_number, vid, i;
1836     double bitrate, ti1, pts;
1837     static int64_t last_time = -1;
1838     static int qp_histogram[52];
1839
1840     if (!print_stats && !is_last_report)
1841         return;
1842
1843     if (!is_last_report) {
1844         int64_t cur_time;
1845         /* display the report every 0.5 seconds */
1846         cur_time = av_gettime();
1847         if (last_time == -1) {
1848             last_time = cur_time;
1849             return;
1850         }
1851         if ((cur_time - last_time) < 500000)
1852             return;
1853         last_time = cur_time;
1854     }
1855
1856
1857     oc = output_files[0]->ctx;
1858
1859     total_size = avio_size(oc->pb);
1860     if (total_size < 0) // FIXME improve avio_size() so it works with non seekable output too
1861         total_size = avio_tell(oc->pb);
1862
1863     buf[0] = '\0';
1864     ti1 = 1e10;
1865     vid = 0;
1866     for (i = 0; i < nb_output_streams; i++) {
1867         float q = -1;
1868         ost = output_streams[i];
1869         enc = ost->st->codec;
1870         if (!ost->stream_copy && enc->coded_frame)
1871             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1872         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1873             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1874         }
1875         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1876             float t = (av_gettime() - timer_start) / 1000000.0;
1877
1878             frame_number = ost->frame_number;
1879             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
1880                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
1881             if (is_last_report)
1882                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1883             if (qp_hist) {
1884                 int j;
1885                 int qp = lrintf(q);
1886                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1887                     qp_histogram[qp]++;
1888                 for (j = 0; j < 32; j++)
1889                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
1890             }
1891             if (enc->flags&CODEC_FLAG_PSNR) {
1892                 int j;
1893                 double error, error_sum = 0;
1894                 double scale, scale_sum = 0;
1895                 char type[3] = { 'Y','U','V' };
1896                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1897                 for (j = 0; j < 3; j++) {
1898                     if (is_last_report) {
1899                         error = enc->error[j];
1900                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1901                     } else {
1902                         error = enc->coded_frame->error[j];
1903                         scale = enc->width * enc->height * 255.0 * 255.0;
1904                     }
1905                     if (j)
1906                         scale /= 4;
1907                     error_sum += error;
1908                     scale_sum += scale;
1909                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
1910                 }
1911                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1912             }
1913             vid = 1;
1914         }
1915         /* compute min output value */
1916         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
1917         if ((pts < ti1) && (pts > 0))
1918             ti1 = pts;
1919     }
1920     if (ti1 < 0.01)
1921         ti1 = 0.01;
1922
1923     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
1924
1925     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1926             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
1927             (double)total_size / 1024, ti1, bitrate);
1928
1929     if (nb_frames_dup || nb_frames_drop)
1930         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1931                 nb_frames_dup, nb_frames_drop);
1932
1933     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1934
1935     fflush(stderr);
1936
1937     if (is_last_report) {
1938         int64_t raw= audio_size + video_size + extra_size;
1939         av_log(NULL, AV_LOG_INFO, "\n");
1940         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
1941                video_size / 1024.0,
1942                audio_size / 1024.0,
1943                extra_size / 1024.0,
1944                100.0 * (total_size - raw) / raw
1945         );
1946     }
1947 }
1948
1949 static void flush_encoders(void)
1950 {
1951     int i, ret;
1952
1953     for (i = 0; i < nb_output_streams; i++) {
1954         OutputStream   *ost = output_streams[i];
1955         AVCodecContext *enc = ost->st->codec;
1956         AVFormatContext *os = output_files[ost->file_index]->ctx;
1957         int stop_encoding = 0;
1958
1959         if (!ost->encoding_needed)
1960             continue;
1961
1962         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1963             continue;
1964         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
1965             continue;
1966
1967         for (;;) {
1968             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1969             const char *desc;
1970             int64_t *size;
1971
1972             switch (ost->st->codec->codec_type) {
1973             case AVMEDIA_TYPE_AUDIO:
1974                 encode = avcodec_encode_audio2;
1975                 desc   = "Audio";
1976                 size   = &audio_size;
1977                 break;
1978             case AVMEDIA_TYPE_VIDEO:
1979                 encode = avcodec_encode_video2;
1980                 desc   = "Video";
1981                 size   = &video_size;
1982                 break;
1983             default:
1984                 stop_encoding = 1;
1985             }
1986
1987             if (encode) {
1988                 AVPacket pkt;
1989                 int got_packet;
1990                 av_init_packet(&pkt);
1991                 pkt.data = NULL;
1992                 pkt.size = 0;
1993
1994                 ret = encode(enc, &pkt, NULL, &got_packet);
1995                 if (ret < 0) {
1996                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1997                     exit_program(1);
1998                 }
1999                 *size += ret;
2000                 if (ost->logfile && enc->stats_out) {
2001                     fprintf(ost->logfile, "%s", enc->stats_out);
2002                 }
2003                 if (!got_packet) {
2004                     stop_encoding = 1;
2005                     break;
2006                 }
2007                 if (pkt.pts != AV_NOPTS_VALUE)
2008                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
2009                 if (pkt.dts != AV_NOPTS_VALUE)
2010                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
2011                 write_frame(os, &pkt, ost);
2012             }
2013
2014             if (stop_encoding)
2015                 break;
2016         }
2017     }
2018 }
2019
2020 /*
2021  * Check whether a packet from ist should be written into ost at this time
2022  */
2023 static int check_output_constraints(InputStream *ist, OutputStream *ost)
2024 {
2025     OutputFile *of = output_files[ost->file_index];
2026     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
2027
2028     if (ost->source_index != ist_index)
2029         return 0;
2030
2031     if (of->start_time && ist->last_dts < of->start_time)
2032         return 0;
2033
2034     return 1;
2035 }
2036
2037 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
2038 {
2039     OutputFile *of = output_files[ost->file_index];
2040     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
2041     AVPacket opkt;
2042
2043     av_init_packet(&opkt);
2044
2045     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
2046         !ost->copy_initial_nonkeyframes)
2047         return;
2048
2049     if (of->recording_time != INT64_MAX &&
2050         ist->last_dts >= of->recording_time + of->start_time) {
2051         ost->is_past_recording_time = 1;
2052         return;
2053     }
2054
2055     /* force the input stream PTS */
2056     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2057         audio_size += pkt->size;
2058     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2059         video_size += pkt->size;
2060         ost->sync_opts++;
2061     }
2062
2063     if (pkt->pts != AV_NOPTS_VALUE)
2064         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
2065     else
2066         opkt.pts = AV_NOPTS_VALUE;
2067
2068     if (pkt->dts == AV_NOPTS_VALUE)
2069         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
2070     else
2071         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
2072     opkt.dts -= ost_tb_start_time;
2073
2074     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
2075     opkt.flags    = pkt->flags;
2076
2077     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
2078     if (  ost->st->codec->codec_id != CODEC_ID_H264
2079        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
2080        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
2081        && ost->st->codec->codec_id != CODEC_ID_VC1
2082        ) {
2083         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
2084             opkt.destruct = av_destruct_packet;
2085     } else {
2086         opkt.data = pkt->data;
2087         opkt.size = pkt->size;
2088     }
2089
2090     write_frame(of->ctx, &opkt, ost);
2091     ost->st->codec->frame_number++;
2092     av_free_packet(&opkt);
2093 }
2094
2095 static void rate_emu_sleep(InputStream *ist)
2096 {
2097     if (input_files[ist->file_index]->rate_emu) {
2098         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
2099         int64_t now = av_gettime() - ist->start;
2100         if (pts > now)
2101             usleep(pts - now);
2102     }
2103 }
2104
2105 static int guess_input_channel_layout(InputStream *ist)
2106 {
2107     AVCodecContext *dec = ist->st->codec;
2108
2109     if (!dec->channel_layout) {
2110         char layout_name[256];
2111
2112         dec->channel_layout = av_get_default_channel_layout(dec->channels);
2113         if (!dec->channel_layout)
2114             return 0;
2115         av_get_channel_layout_string(layout_name, sizeof(layout_name),
2116                                      dec->channels, dec->channel_layout);
2117         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
2118                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
2119     }
2120     return 1;
2121 }
2122
2123 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
2124 {
2125     AVFrame *decoded_frame;
2126     AVCodecContext *avctx = ist->st->codec;
2127     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
2128     int i, ret, resample_changed;
2129
2130     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2131         return AVERROR(ENOMEM);
2132     else
2133         avcodec_get_frame_defaults(ist->decoded_frame);
2134     decoded_frame = ist->decoded_frame;
2135
2136     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
2137     if (ret < 0) {
2138         return ret;
2139     }
2140
2141     if (!*got_output) {
2142         /* no audio frame */
2143         if (!pkt->size)
2144             for (i = 0; i < ist->nb_filters; i++)
2145                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
2146         return ret;
2147     }
2148
2149     /* if the decoder provides a pts, use it instead of the last packet pts.
2150        the decoder could be delaying output by a packet or more. */
2151     if (decoded_frame->pts != AV_NOPTS_VALUE)
2152         ist->next_dts = decoded_frame->pts;
2153     else if (pkt->pts != AV_NOPTS_VALUE) {
2154         decoded_frame->pts = pkt->pts;
2155         pkt->pts           = AV_NOPTS_VALUE;
2156     }
2157
2158     // preprocess audio (volume)
2159     if (audio_volume != 256) {
2160         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
2161         void *samples = decoded_frame->data[0];
2162         switch (avctx->sample_fmt) {
2163         case AV_SAMPLE_FMT_U8:
2164         {
2165             uint8_t *volp = samples;
2166             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2167                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
2168                 *volp++ = av_clip_uint8(v);
2169             }
2170             break;
2171         }
2172         case AV_SAMPLE_FMT_S16:
2173         {
2174             int16_t *volp = samples;
2175             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2176                 int v = ((*volp) * audio_volume + 128) >> 8;
2177                 *volp++ = av_clip_int16(v);
2178             }
2179             break;
2180         }
2181         case AV_SAMPLE_FMT_S32:
2182         {
2183             int32_t *volp = samples;
2184             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2185                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
2186                 *volp++ = av_clipl_int32(v);
2187             }
2188             break;
2189         }
2190         case AV_SAMPLE_FMT_FLT:
2191         {
2192             float *volp = samples;
2193             float scale = audio_volume / 256.f;
2194             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2195                 *volp++ *= scale;
2196             }
2197             break;
2198         }
2199         case AV_SAMPLE_FMT_DBL:
2200         {
2201             double *volp = samples;
2202             double scale = audio_volume / 256.;
2203             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2204                 *volp++ *= scale;
2205             }
2206             break;
2207         }
2208         default:
2209             av_log(NULL, AV_LOG_FATAL,
2210                    "Audio volume adjustment on sample format %s is not supported.\n",
2211                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
2212             exit_program(1);
2213         }
2214     }
2215
2216     rate_emu_sleep(ist);
2217
2218     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
2219                        ist->resample_channels       != avctx->channels               ||
2220                        ist->resample_channel_layout != decoded_frame->channel_layout ||
2221                        ist->resample_sample_rate    != decoded_frame->sample_rate;
2222     if (resample_changed) {
2223         char layout1[64], layout2[64];
2224
2225         if (!guess_input_channel_layout(ist)) {
2226             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
2227                    "layout for Input Stream #%d.%d\n", ist->file_index,
2228                    ist->st->index);
2229             exit_program(1);
2230         }
2231         decoded_frame->channel_layout = avctx->channel_layout;
2232
2233         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
2234                                      ist->resample_channel_layout);
2235         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
2236                                      decoded_frame->channel_layout);
2237
2238         av_log(NULL, AV_LOG_INFO,
2239                "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",
2240                ist->file_index, ist->st->index,
2241                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2242                ist->resample_channels, layout1,
2243                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2244                avctx->channels, layout2);
2245
2246         ist->resample_sample_fmt     = decoded_frame->format;
2247         ist->resample_sample_rate    = decoded_frame->sample_rate;
2248         ist->resample_channel_layout = decoded_frame->channel_layout;
2249         ist->resample_channels       = avctx->channels;
2250
2251         for (i = 0; i < nb_filtergraphs; i++)
2252             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2253                 configure_filtergraph(filtergraphs[i]) < 0) {
2254                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2255                 exit_program(1);
2256             }
2257     }
2258
2259     for (i = 0; i < ist->nb_filters; i++)
2260         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
2261
2262     return ret;
2263 }
2264
2265 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
2266 {
2267     AVFrame *decoded_frame;
2268     void *buffer_to_free = NULL;
2269     int i, ret = 0, resample_changed;
2270     float quality;
2271
2272     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2273         return AVERROR(ENOMEM);
2274     else
2275         avcodec_get_frame_defaults(ist->decoded_frame);
2276     decoded_frame = ist->decoded_frame;
2277
2278     ret = avcodec_decode_video2(ist->st->codec,
2279                                 decoded_frame, got_output, pkt);
2280     if (ret < 0)
2281         return ret;
2282
2283     quality = same_quant ? decoded_frame->quality : 0;
2284     if (!*got_output) {
2285         /* no picture yet */
2286         if (!pkt->size)
2287             for (i = 0; i < ist->nb_filters; i++)
2288                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
2289         return ret;
2290     }
2291     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
2292                                            decoded_frame->pkt_dts);
2293     pkt->size = 0;
2294     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2295
2296     rate_emu_sleep(ist);
2297
2298     if (ist->st->sample_aspect_ratio.num)
2299         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2300
2301     resample_changed = ist->resample_width   != decoded_frame->width  ||
2302                        ist->resample_height  != decoded_frame->height ||
2303                        ist->resample_pix_fmt != decoded_frame->format;
2304     if (resample_changed) {
2305         av_log(NULL, AV_LOG_INFO,
2306                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2307                ist->file_index, ist->st->index,
2308                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2309                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2310
2311         ist->resample_width   = decoded_frame->width;
2312         ist->resample_height  = decoded_frame->height;
2313         ist->resample_pix_fmt = decoded_frame->format;
2314
2315         for (i = 0; i < nb_filtergraphs; i++)
2316             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2317                 configure_filtergraph(filtergraphs[i]) < 0) {
2318                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2319                 exit_program(1);
2320             }
2321     }
2322
2323     for (i = 0; i < ist->nb_filters; i++) {
2324         // XXX what an ugly hack
2325         if (ist->filters[i]->graph->nb_outputs == 1)
2326             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2327
2328         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
2329             FrameBuffer      *buf = decoded_frame->opaque;
2330             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2331                                         decoded_frame->data, decoded_frame->linesize,
2332                                         AV_PERM_READ | AV_PERM_PRESERVE,
2333                                         ist->st->codec->width, ist->st->codec->height,
2334                                         ist->st->codec->pix_fmt);
2335
2336             avfilter_copy_frame_props(fb, decoded_frame);
2337             fb->buf->priv           = buf;
2338             fb->buf->free           = filter_release_buffer;
2339
2340             buf->refcount++;
2341             av_buffersrc_buffer(ist->filters[i]->filter, fb);
2342         } else
2343             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
2344     }
2345
2346     av_free(buffer_to_free);
2347     return ret;
2348 }
2349
2350 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2351 {
2352     AVSubtitle subtitle;
2353     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2354                                           &subtitle, got_output, pkt);
2355     if (ret < 0)
2356         return ret;
2357     if (!*got_output)
2358         return ret;
2359
2360     rate_emu_sleep(ist);
2361
2362     for (i = 0; i < nb_output_streams; i++) {
2363         OutputStream *ost = output_streams[i];
2364
2365         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2366             continue;
2367
2368         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2369     }
2370
2371     avsubtitle_free(&subtitle);
2372     return ret;
2373 }
2374
2375 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2376 static int output_packet(InputStream *ist, const AVPacket *pkt)
2377 {
2378     int i;
2379     int got_output;
2380     AVPacket avpkt;
2381
2382     if (ist->next_dts == AV_NOPTS_VALUE)
2383         ist->next_dts = ist->last_dts;
2384
2385     if (pkt == NULL) {
2386         /* EOF handling */
2387         av_init_packet(&avpkt);
2388         avpkt.data = NULL;
2389         avpkt.size = 0;
2390         goto handle_eof;
2391     } else {
2392         avpkt = *pkt;
2393     }
2394
2395     if (pkt->dts != AV_NOPTS_VALUE)
2396         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2397
2398     // while we have more to decode or while the decoder did output something on EOF
2399     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2400         int ret = 0;
2401     handle_eof:
2402
2403         ist->last_dts = ist->next_dts;
2404
2405         if (avpkt.size && avpkt.size != pkt->size) {
2406             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2407                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2408             ist->showed_multi_packet_warning = 1;
2409         }
2410
2411         switch (ist->st->codec->codec_type) {
2412         case AVMEDIA_TYPE_AUDIO:
2413             ret = decode_audio    (ist, &avpkt, &got_output);
2414             break;
2415         case AVMEDIA_TYPE_VIDEO:
2416             ret = decode_video    (ist, &avpkt, &got_output);
2417             if (avpkt.duration)
2418                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2419             else if (ist->st->r_frame_rate.num)
2420                 ist->next_dts += av_rescale_q(1, (AVRational){ist->st->r_frame_rate.den,
2421                                                               ist->st->r_frame_rate.num},
2422                                               AV_TIME_BASE_Q);
2423             else if (ist->st->codec->time_base.num != 0) {
2424                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
2425                                                    ist->st->codec->ticks_per_frame;
2426                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
2427             }
2428             break;
2429         case AVMEDIA_TYPE_SUBTITLE:
2430             ret = transcode_subtitles(ist, &avpkt, &got_output);
2431             break;
2432         default:
2433             return -1;
2434         }
2435
2436         if (ret < 0)
2437             return ret;
2438         // touch data and size only if not EOF
2439         if (pkt) {
2440             avpkt.data += ret;
2441             avpkt.size -= ret;
2442         }
2443         if (!got_output) {
2444             continue;
2445         }
2446     }
2447
2448     /* handle stream copy */
2449     if (!ist->decoding_needed) {
2450         rate_emu_sleep(ist);
2451         ist->last_dts = ist->next_dts;
2452         switch (ist->st->codec->codec_type) {
2453         case AVMEDIA_TYPE_AUDIO:
2454             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2455                              ist->st->codec->sample_rate;
2456             break;
2457         case AVMEDIA_TYPE_VIDEO:
2458             if (ist->st->codec->time_base.num != 0) {
2459                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2460                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2461                                   ist->st->codec->time_base.num * ticks) /
2462                                   ist->st->codec->time_base.den;
2463             }
2464             break;
2465         }
2466     }
2467     for (i = 0; pkt && i < nb_output_streams; i++) {
2468         OutputStream *ost = output_streams[i];
2469
2470         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2471             continue;
2472
2473         do_streamcopy(ist, ost, pkt);
2474     }
2475
2476     return 0;
2477 }
2478
2479 static void print_sdp(void)
2480 {
2481     char sdp[2048];
2482     int i;
2483     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2484
2485     if (!avc)
2486         exit_program(1);
2487     for (i = 0; i < nb_output_files; i++)
2488         avc[i] = output_files[i]->ctx;
2489
2490     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2491     printf("SDP:\n%s\n", sdp);
2492     fflush(stdout);
2493     av_freep(&avc);
2494 }
2495
2496 static int init_input_stream(int ist_index, char *error, int error_len)
2497 {
2498     int i;
2499     InputStream *ist = input_streams[ist_index];
2500     if (ist->decoding_needed) {
2501         AVCodec *codec = ist->dec;
2502         if (!codec) {
2503             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
2504                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
2505             return AVERROR(EINVAL);
2506         }
2507
2508         /* update requested sample format for the decoder based on the
2509            corresponding encoder sample format */
2510         for (i = 0; i < nb_output_streams; i++) {
2511             OutputStream *ost = output_streams[i];
2512             if (ost->source_index == ist_index) {
2513                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
2514                 break;
2515             }
2516         }
2517
2518         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
2519             ist->st->codec->get_buffer     = codec_get_buffer;
2520             ist->st->codec->release_buffer = codec_release_buffer;
2521             ist->st->codec->opaque         = ist;
2522         }
2523
2524         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2525             av_dict_set(&ist->opts, "threads", "auto", 0);
2526         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2527             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2528                     ist->file_index, ist->st->index);
2529             return AVERROR(EINVAL);
2530         }
2531         assert_codec_experimental(ist->st->codec, 0);
2532         assert_avoptions(ist->opts);
2533     }
2534
2535     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;
2536     ist->next_dts = AV_NOPTS_VALUE;
2537     init_pts_correction(&ist->pts_ctx);
2538     ist->is_start = 1;
2539
2540     return 0;
2541 }
2542
2543 static InputStream *get_input_stream(OutputStream *ost)
2544 {
2545     if (ost->source_index >= 0)
2546         return input_streams[ost->source_index];
2547
2548     if (ost->filter) {
2549         FilterGraph *fg = ost->filter->graph;
2550         int i;
2551
2552         for (i = 0; i < fg->nb_inputs; i++)
2553             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
2554                 return fg->inputs[i]->ist;
2555     }
2556
2557     return NULL;
2558 }
2559
2560 static int transcode_init(void)
2561 {
2562     int ret = 0, i, j, k;
2563     AVFormatContext *oc;
2564     AVCodecContext *codec, *icodec;
2565     OutputStream *ost;
2566     InputStream *ist;
2567     char error[1024];
2568     int want_sdp = 1;
2569
2570     /* init framerate emulation */
2571     for (i = 0; i < nb_input_files; i++) {
2572         InputFile *ifile = input_files[i];
2573         if (ifile->rate_emu)
2574             for (j = 0; j < ifile->nb_streams; j++)
2575                 input_streams[j + ifile->ist_index]->start = av_gettime();
2576     }
2577
2578     /* output stream init */
2579     for (i = 0; i < nb_output_files; i++) {
2580         oc = output_files[i]->ctx;
2581         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2582             av_dump_format(oc, i, oc->filename, 1);
2583             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2584             return AVERROR(EINVAL);
2585         }
2586     }
2587
2588     /* init complex filtergraphs */
2589     for (i = 0; i < nb_filtergraphs; i++)
2590         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2591             return ret;
2592
2593     /* for each output stream, we compute the right encoding parameters */
2594     for (i = 0; i < nb_output_streams; i++) {
2595         ost = output_streams[i];
2596         oc  = output_files[ost->file_index]->ctx;
2597         ist = get_input_stream(ost);
2598
2599         if (ost->attachment_filename)
2600             continue;
2601
2602         codec  = ost->st->codec;
2603
2604         if (ist) {
2605             icodec = ist->st->codec;
2606
2607             ost->st->disposition          = ist->st->disposition;
2608             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2609             codec->chroma_sample_location = icodec->chroma_sample_location;
2610         }
2611
2612         if (ost->stream_copy) {
2613             uint64_t extra_size;
2614
2615             av_assert0(ist && !ost->filter);
2616
2617             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2618
2619             if (extra_size > INT_MAX) {
2620                 return AVERROR(EINVAL);
2621             }
2622
2623             /* if stream_copy is selected, no need to decode or encode */
2624             codec->codec_id   = icodec->codec_id;
2625             codec->codec_type = icodec->codec_type;
2626
2627             if (!codec->codec_tag) {
2628                 if (!oc->oformat->codec_tag ||
2629                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2630                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2631                     codec->codec_tag = icodec->codec_tag;
2632             }
2633
2634             codec->bit_rate       = icodec->bit_rate;
2635             codec->rc_max_rate    = icodec->rc_max_rate;
2636             codec->rc_buffer_size = icodec->rc_buffer_size;
2637             codec->field_order    = icodec->field_order;
2638             codec->extradata      = av_mallocz(extra_size);
2639             if (!codec->extradata) {
2640                 return AVERROR(ENOMEM);
2641             }
2642             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2643             codec->extradata_size = icodec->extradata_size;
2644             if (!copy_tb) {
2645                 codec->time_base      = icodec->time_base;
2646                 codec->time_base.num *= icodec->ticks_per_frame;
2647                 av_reduce(&codec->time_base.num, &codec->time_base.den,
2648                           codec->time_base.num, codec->time_base.den, INT_MAX);
2649             } else
2650                 codec->time_base = ist->st->time_base;
2651
2652             switch (codec->codec_type) {
2653             case AVMEDIA_TYPE_AUDIO:
2654                 if (audio_volume != 256) {
2655                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2656                     exit_program(1);
2657                 }
2658                 codec->channel_layout     = icodec->channel_layout;
2659                 codec->sample_rate        = icodec->sample_rate;
2660                 codec->channels           = icodec->channels;
2661                 codec->frame_size         = icodec->frame_size;
2662                 codec->audio_service_type = icodec->audio_service_type;
2663                 codec->block_align        = icodec->block_align;
2664                 break;
2665             case AVMEDIA_TYPE_VIDEO:
2666                 codec->pix_fmt            = icodec->pix_fmt;
2667                 codec->width              = icodec->width;
2668                 codec->height             = icodec->height;
2669                 codec->has_b_frames       = icodec->has_b_frames;
2670                 if (!codec->sample_aspect_ratio.num) {
2671                     codec->sample_aspect_ratio   =
2672                     ost->st->sample_aspect_ratio =
2673                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2674                         ist->st->codec->sample_aspect_ratio.num ?
2675                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2676                 }
2677                 break;
2678             case AVMEDIA_TYPE_SUBTITLE:
2679                 codec->width  = icodec->width;
2680                 codec->height = icodec->height;
2681                 break;
2682             case AVMEDIA_TYPE_DATA:
2683             case AVMEDIA_TYPE_ATTACHMENT:
2684                 break;
2685             default:
2686                 abort();
2687             }
2688         } else {
2689             if (!ost->enc) {
2690                 /* should only happen when a default codec is not present. */
2691                 snprintf(error, sizeof(error), "Automatic encoder selection "
2692                          "failed for output stream #%d:%d. Default encoder for "
2693                          "format %s is probably disabled. Please choose an "
2694                          "encoder manually.\n", ost->file_index, ost->index,
2695                          oc->oformat->name);
2696                 ret = AVERROR(EINVAL);
2697                 goto dump_format;
2698             }
2699
2700             if (ist)
2701                 ist->decoding_needed = 1;
2702             ost->encoding_needed = 1;
2703
2704             /*
2705              * We want CFR output if and only if one of those is true:
2706              * 1) user specified output framerate with -r
2707              * 2) user specified -vsync cfr
2708              * 3) output format is CFR and the user didn't force vsync to
2709              *    something else than CFR
2710              *
2711              * in such a case, set ost->frame_rate
2712              */
2713             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
2714                 !ost->frame_rate.num && ist &&
2715                 (video_sync_method ==  VSYNC_CFR ||
2716                  (video_sync_method ==  VSYNC_AUTO &&
2717                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
2718                 ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
2719                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2720                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2721                     ost->frame_rate = ost->enc->supported_framerates[idx];
2722                 }
2723             }
2724
2725             if (!ost->filter &&
2726                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2727                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2728                     FilterGraph *fg;
2729                     fg = init_simple_filtergraph(ist, ost);
2730                     if (configure_simple_filtergraph(fg)) {
2731                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2732                         exit(1);
2733                     }
2734             }
2735
2736             switch (codec->codec_type) {
2737             case AVMEDIA_TYPE_AUDIO:
2738                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2739                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2740                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2741                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
2742                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2743                 break;
2744             case AVMEDIA_TYPE_VIDEO:
2745                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
2746
2747                 codec->width  = ost->filter->filter->inputs[0]->w;
2748                 codec->height = ost->filter->filter->inputs[0]->h;
2749                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2750                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
2751                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
2752                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2753                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2754
2755                 if (codec->width   != icodec->width  ||
2756                     codec->height  != icodec->height ||
2757                     codec->pix_fmt != icodec->pix_fmt) {
2758                     codec->bits_per_raw_sample = 0;
2759                 }
2760
2761                 break;
2762             case AVMEDIA_TYPE_SUBTITLE:
2763                 codec->time_base = (AVRational){1, 1000};
2764                 break;
2765             default:
2766                 abort();
2767                 break;
2768             }
2769             /* two pass mode */
2770             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
2771                 char logfilename[1024];
2772                 FILE *f;
2773
2774                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2775                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
2776                          i);
2777                 if (!strcmp(ost->enc->name, "libx264")) {
2778                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2779                 } else {
2780                     if (codec->flags & CODEC_FLAG_PASS1) {
2781                         f = fopen(logfilename, "wb");
2782                         if (!f) {
2783                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2784                                    logfilename, strerror(errno));
2785                             exit_program(1);
2786                         }
2787                         ost->logfile = f;
2788                     } else {
2789                         char  *logbuffer;
2790                         size_t logbuffer_size;
2791                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2792                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2793                                    logfilename);
2794                             exit_program(1);
2795                         }
2796                         codec->stats_in = logbuffer;
2797                     }
2798                 }
2799             }
2800         }
2801     }
2802
2803     /* open each encoder */
2804     for (i = 0; i < nb_output_streams; i++) {
2805         ost = output_streams[i];
2806         if (ost->encoding_needed) {
2807             AVCodec      *codec = ost->enc;
2808             AVCodecContext *dec = NULL;
2809
2810             if ((ist = get_input_stream(ost)))
2811                 dec = ist->st->codec;
2812             if (dec && dec->subtitle_header) {
2813                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
2814                 if (!ost->st->codec->subtitle_header) {
2815                     ret = AVERROR(ENOMEM);
2816                     goto dump_format;
2817                 }
2818                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2819                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2820             }
2821             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2822                 av_dict_set(&ost->opts, "threads", "auto", 0);
2823             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
2824                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2825                         ost->file_index, ost->index);
2826                 ret = AVERROR(EINVAL);
2827                 goto dump_format;
2828             }
2829             assert_codec_experimental(ost->st->codec, 1);
2830             assert_avoptions(ost->opts);
2831             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2832                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2833                                              "It takes bits/s as argument, not kbits/s\n");
2834             extra_size += ost->st->codec->extradata_size;
2835
2836             if (ost->st->codec->me_threshold)
2837                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
2838         }
2839     }
2840
2841     /* init input streams */
2842     for (i = 0; i < nb_input_streams; i++)
2843         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
2844             goto dump_format;
2845
2846     /* discard unused programs */
2847     for (i = 0; i < nb_input_files; i++) {
2848         InputFile *ifile = input_files[i];
2849         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2850             AVProgram *p = ifile->ctx->programs[j];
2851             int discard  = AVDISCARD_ALL;
2852
2853             for (k = 0; k < p->nb_stream_indexes; k++)
2854                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
2855                     discard = AVDISCARD_DEFAULT;
2856                     break;
2857                 }
2858             p->discard = discard;
2859         }
2860     }
2861
2862     /* open files and write file headers */
2863     for (i = 0; i < nb_output_files; i++) {
2864         oc = output_files[i]->ctx;
2865         oc->interrupt_callback = int_cb;
2866         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
2867             char errbuf[128];
2868             const char *errbuf_ptr = errbuf;
2869             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
2870                 errbuf_ptr = strerror(AVUNERROR(ret));
2871             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
2872             ret = AVERROR(EINVAL);
2873             goto dump_format;
2874         }
2875         assert_avoptions(output_files[i]->opts);
2876         if (strcmp(oc->oformat->name, "rtp")) {
2877             want_sdp = 0;
2878         }
2879     }
2880
2881  dump_format:
2882     /* dump the file output parameters - cannot be done before in case
2883        of stream copy */
2884     for (i = 0; i < nb_output_files; i++) {
2885         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
2886     }
2887
2888     /* dump the stream mapping */
2889     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2890     for (i = 0; i < nb_input_streams; i++) {
2891         ist = input_streams[i];
2892
2893         for (j = 0; j < ist->nb_filters; j++) {
2894             AVFilterLink *link = ist->filters[j]->filter->outputs[0];
2895             if (ist->filters[j]->graph->graph_desc) {
2896                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
2897                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
2898                        link->dst->filter->name);
2899                 if (link->dst->input_count > 1)
2900                     av_log(NULL, AV_LOG_INFO, ":%s", link->dstpad->name);
2901                 if (nb_filtergraphs > 1)
2902                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
2903                 av_log(NULL, AV_LOG_INFO, "\n");
2904             }
2905         }
2906     }
2907
2908     for (i = 0; i < nb_output_streams; i++) {
2909         ost = output_streams[i];
2910
2911         if (ost->attachment_filename) {
2912             /* an attached file */
2913             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2914                    ost->attachment_filename, ost->file_index, ost->index);
2915             continue;
2916         }
2917
2918         if (ost->filter && ost->filter->graph->graph_desc) {
2919             /* output from a complex graph */
2920             AVFilterLink *link = ost->filter->filter->inputs[0];
2921             av_log(NULL, AV_LOG_INFO, "  %s", link->src->filter->name);
2922             if (link->src->output_count > 1)
2923                 av_log(NULL, AV_LOG_INFO, ":%s", link->srcpad->name);
2924             if (nb_filtergraphs > 1)
2925                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
2926
2927             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
2928                    ost->index, ost->enc ? ost->enc->name : "?");
2929             continue;
2930         }
2931
2932         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2933                input_streams[ost->source_index]->file_index,
2934                input_streams[ost->source_index]->st->index,
2935                ost->file_index,
2936                ost->index);
2937         if (ost->sync_ist != input_streams[ost->source_index])
2938             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2939                    ost->sync_ist->file_index,
2940                    ost->sync_ist->st->index);
2941         if (ost->stream_copy)
2942             av_log(NULL, AV_LOG_INFO, " (copy)");
2943         else
2944             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
2945                    input_streams[ost->source_index]->dec->name : "?",
2946                    ost->enc ? ost->enc->name : "?");
2947         av_log(NULL, AV_LOG_INFO, "\n");
2948     }
2949
2950     if (ret) {
2951         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2952         return ret;
2953     }
2954
2955     if (want_sdp) {
2956         print_sdp();
2957     }
2958
2959     return 0;
2960 }
2961
2962 /*
2963  * The following code is the main loop of the file converter
2964  */
2965 static int transcode(void)
2966 {
2967     int ret, i;
2968     AVFormatContext *is, *os;
2969     OutputStream *ost;
2970     InputStream *ist;
2971     uint8_t *no_packet;
2972     int no_packet_count = 0;
2973     int64_t timer_start;
2974
2975     if (!(no_packet = av_mallocz(nb_input_files)))
2976         exit_program(1);
2977
2978     ret = transcode_init();
2979     if (ret < 0)
2980         goto fail;
2981
2982     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2983     term_init();
2984
2985     timer_start = av_gettime();
2986
2987     for (; received_sigterm == 0;) {
2988         int file_index, ist_index, past_recording_time = 1;
2989         AVPacket pkt;
2990         int64_t ipts_min;
2991
2992         ipts_min = INT64_MAX;
2993
2994         /* check if there's any stream where output is still needed */
2995         for (i = 0; i < nb_output_streams; i++) {
2996             OutputFile *of;
2997             ost = output_streams[i];
2998             of  = output_files[ost->file_index];
2999             os  = output_files[ost->file_index]->ctx;
3000             if (ost->is_past_recording_time ||
3001                 (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3002                 continue;
3003             if (ost->frame_number > ost->max_frames) {
3004                 int j;
3005                 for (j = 0; j < of->ctx->nb_streams; j++)
3006                     output_streams[of->ost_index + j]->is_past_recording_time = 1;
3007                 continue;
3008             }
3009             past_recording_time = 0;
3010         }
3011         if (past_recording_time)
3012             break;
3013
3014         /* select the stream that we must read now by looking at the
3015            smallest output pts */
3016         file_index = -1;
3017         for (i = 0; i < nb_input_streams; i++) {
3018             int64_t ipts;
3019             ist = input_streams[i];
3020             ipts = ist->last_dts;
3021             if (ist->discard || no_packet[ist->file_index])
3022                 continue;
3023             if (!input_files[ist->file_index]->eof_reached) {
3024                 if (ipts < ipts_min) {
3025                     ipts_min = ipts;
3026                     file_index = ist->file_index;
3027                 }
3028             }
3029         }
3030         /* if none, if is finished */
3031         if (file_index < 0) {
3032             if (no_packet_count) {
3033                 no_packet_count = 0;
3034                 memset(no_packet, 0, nb_input_files);
3035                 usleep(10000);
3036                 continue;
3037             }
3038             break;
3039         }
3040
3041         /* read a frame from it and output it in the fifo */
3042         is  = input_files[file_index]->ctx;
3043         ret = av_read_frame(is, &pkt);
3044         if (ret == AVERROR(EAGAIN)) {
3045             no_packet[file_index] = 1;
3046             no_packet_count++;
3047             continue;
3048         }
3049         if (ret < 0) {
3050             input_files[file_index]->eof_reached = 1;
3051
3052             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
3053                 ist = input_streams[input_files[file_index]->ist_index + i];
3054                 if (ist->decoding_needed)
3055                     output_packet(ist, NULL);
3056             }
3057
3058             if (opt_shortest)
3059                 break;
3060             else
3061                 continue;
3062         }
3063
3064         no_packet_count = 0;
3065         memset(no_packet, 0, nb_input_files);
3066
3067         if (do_pkt_dump) {
3068             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3069                              is->streams[pkt.stream_index]);
3070         }
3071         /* the following test is needed in case new streams appear
3072            dynamically in stream : we ignore them */
3073         if (pkt.stream_index >= input_files[file_index]->nb_streams)
3074             goto discard_packet;
3075         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
3076         ist = input_streams[ist_index];
3077         if (ist->discard)
3078             goto discard_packet;
3079
3080         if (pkt.dts != AV_NOPTS_VALUE)
3081             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3082         if (pkt.pts != AV_NOPTS_VALUE)
3083             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3084
3085         if (pkt.pts != AV_NOPTS_VALUE)
3086             pkt.pts *= ist->ts_scale;
3087         if (pkt.dts != AV_NOPTS_VALUE)
3088             pkt.dts *= ist->ts_scale;
3089
3090         //fprintf(stderr, "next:%"PRId64" dts:%"PRId64" off:%"PRId64" %d\n",
3091         //        ist->next_dts,
3092         //        pkt.dts, input_files[ist->file_index].ts_offset,
3093         //        ist->st->codec->codec_type);
3094         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE
3095             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
3096             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3097             int64_t delta   = pkt_dts - ist->next_dts;
3098             if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
3099                 input_files[ist->file_index]->ts_offset -= delta;
3100                 av_log(NULL, AV_LOG_DEBUG,
3101                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3102                        delta, input_files[ist->file_index]->ts_offset);
3103                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3104                 if (pkt.pts != AV_NOPTS_VALUE)
3105                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3106             }
3107         }
3108
3109         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
3110         if (output_packet(ist, &pkt) < 0 || poll_filters() < 0) {
3111             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
3112                    ist->file_index, ist->st->index);
3113             if (exit_on_error)
3114                 exit_program(1);
3115             av_free_packet(&pkt);
3116             continue;
3117         }
3118
3119     discard_packet:
3120         av_free_packet(&pkt);
3121
3122         /* dump report by using the output first video and audio streams */
3123         print_report(0, timer_start);
3124     }
3125
3126     /* at the end of stream, we must flush the decoder buffers */
3127     for (i = 0; i < nb_input_streams; i++) {
3128         ist = input_streams[i];
3129         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3130             output_packet(ist, NULL);
3131         }
3132     }
3133     poll_filters();
3134     flush_encoders();
3135
3136     term_exit();
3137
3138     /* write the trailer if needed and close file */
3139     for (i = 0; i < nb_output_files; i++) {
3140         os = output_files[i]->ctx;
3141         av_write_trailer(os);
3142     }
3143
3144     /* dump report by using the first video and audio streams */
3145     print_report(1, timer_start);
3146
3147     /* close each encoder */
3148     for (i = 0; i < nb_output_streams; i++) {
3149         ost = output_streams[i];
3150         if (ost->encoding_needed) {
3151             av_freep(&ost->st->codec->stats_in);
3152             avcodec_close(ost->st->codec);
3153         }
3154     }
3155
3156     /* close each decoder */
3157     for (i = 0; i < nb_input_streams; i++) {
3158         ist = input_streams[i];
3159         if (ist->decoding_needed) {
3160             avcodec_close(ist->st->codec);
3161         }
3162     }
3163
3164     /* finished ! */
3165     ret = 0;
3166
3167  fail:
3168     av_freep(&no_packet);
3169
3170     if (output_streams) {
3171         for (i = 0; i < nb_output_streams; i++) {
3172             ost = output_streams[i];
3173             if (ost) {
3174                 if (ost->stream_copy)
3175                     av_freep(&ost->st->codec->extradata);
3176                 if (ost->logfile) {
3177                     fclose(ost->logfile);
3178                     ost->logfile = NULL;
3179                 }
3180                 av_freep(&ost->st->codec->subtitle_header);
3181                 av_free(ost->forced_kf_pts);
3182                 av_dict_free(&ost->opts);
3183             }
3184         }
3185     }
3186     return ret;
3187 }
3188
3189 static double parse_frame_aspect_ratio(const char *arg)
3190 {
3191     int x = 0, y = 0;
3192     double ar = 0;
3193     const char *p;
3194     char *end;
3195
3196     p = strchr(arg, ':');
3197     if (p) {
3198         x = strtol(arg, &end, 10);
3199         if (end == p)
3200             y = strtol(end + 1, &end, 10);
3201         if (x > 0 && y > 0)
3202             ar = (double)x / (double)y;
3203     } else
3204         ar = strtod(arg, NULL);
3205
3206     if (!ar) {
3207         av_log(NULL, AV_LOG_FATAL, "Incorrect aspect ratio specification.\n");
3208         exit_program(1);
3209     }
3210     return ar;
3211 }
3212
3213 static int opt_audio_codec(OptionsContext *o, const char *opt, const char *arg)
3214 {
3215     return parse_option(o, "codec:a", arg, options);
3216 }
3217
3218 static int opt_video_codec(OptionsContext *o, const char *opt, const char *arg)
3219 {
3220     return parse_option(o, "codec:v", arg, options);
3221 }
3222
3223 static int opt_subtitle_codec(OptionsContext *o, const char *opt, const char *arg)
3224 {
3225     return parse_option(o, "codec:s", arg, options);
3226 }
3227
3228 static int opt_data_codec(OptionsContext *o, const char *opt, const char *arg)
3229 {
3230     return parse_option(o, "codec:d", arg, options);
3231 }
3232
3233 static int opt_map(OptionsContext *o, const char *opt, const char *arg)
3234 {
3235     StreamMap *m = NULL;
3236     int i, negative = 0, file_idx;
3237     int sync_file_idx = -1, sync_stream_idx;
3238     char *p, *sync;
3239     char *map;
3240
3241     if (*arg == '-') {
3242         negative = 1;
3243         arg++;
3244     }
3245     map = av_strdup(arg);
3246
3247     /* parse sync stream first, just pick first matching stream */
3248     if (sync = strchr(map, ',')) {
3249         *sync = 0;
3250         sync_file_idx = strtol(sync + 1, &sync, 0);
3251         if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
3252             av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
3253             exit_program(1);
3254         }
3255         if (*sync)
3256             sync++;
3257         for (i = 0; i < input_files[sync_file_idx]->nb_streams; i++)
3258             if (check_stream_specifier(input_files[sync_file_idx]->ctx,
3259                                        input_files[sync_file_idx]->ctx->streams[i], sync) == 1) {
3260                 sync_stream_idx = i;
3261                 break;
3262             }
3263         if (i == input_files[sync_file_idx]->nb_streams) {
3264             av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
3265                                        "match any streams.\n", arg);
3266             exit_program(1);
3267         }
3268     }
3269
3270
3271     if (map[0] == '[') {
3272         /* this mapping refers to lavfi output */
3273         const char *c = map + 1;
3274         o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3275                                     &o->nb_stream_maps, o->nb_stream_maps + 1);
3276         m = &o->stream_maps[o->nb_stream_maps - 1];
3277         m->linklabel = av_get_token(&c, "]");
3278         if (!m->linklabel) {
3279             av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
3280             exit_program(1);
3281         }
3282     } else {
3283         file_idx = strtol(map, &p, 0);
3284         if (file_idx >= nb_input_files || file_idx < 0) {
3285             av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
3286             exit_program(1);
3287         }
3288         if (negative)
3289             /* disable some already defined maps */
3290             for (i = 0; i < o->nb_stream_maps; i++) {
3291                 m = &o->stream_maps[i];
3292                 if (file_idx == m->file_index &&
3293                     check_stream_specifier(input_files[m->file_index]->ctx,
3294                                            input_files[m->file_index]->ctx->streams[m->stream_index],
3295                                            *p == ':' ? p + 1 : p) > 0)
3296                     m->disabled = 1;
3297             }
3298         else
3299             for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
3300                 if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
3301                             *p == ':' ? p + 1 : p) <= 0)
3302                     continue;
3303                 o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3304                                             &o->nb_stream_maps, o->nb_stream_maps + 1);
3305                 m = &o->stream_maps[o->nb_stream_maps - 1];
3306
3307                 m->file_index   = file_idx;
3308                 m->stream_index = i;
3309
3310                 if (sync_file_idx >= 0) {
3311                     m->sync_file_index   = sync_file_idx;
3312                     m->sync_stream_index = sync_stream_idx;
3313                 } else {
3314                     m->sync_file_index   = file_idx;
3315                     m->sync_stream_index = i;
3316                 }
3317             }
3318     }
3319
3320     if (!m) {
3321         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
3322         exit_program(1);
3323     }
3324
3325     av_freep(&map);
3326     return 0;
3327 }
3328
3329 static int opt_attach(OptionsContext *o, const char *opt, const char *arg)
3330 {
3331     o->attachments = grow_array(o->attachments, sizeof(*o->attachments),
3332                                 &o->nb_attachments, o->nb_attachments + 1);
3333     o->attachments[o->nb_attachments - 1] = arg;
3334     return 0;
3335 }
3336
3337 /**
3338  * Parse a metadata specifier in arg.
3339  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
3340  * @param index for type c/p, chapter/program index is written here
3341  * @param stream_spec for type s, the stream specifier is written here
3342  */
3343 static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
3344 {
3345     if (*arg) {
3346         *type = *arg;
3347         switch (*arg) {
3348         case 'g':
3349             break;
3350         case 's':
3351             if (*(++arg) && *arg != ':') {
3352                 av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
3353                 exit_program(1);
3354             }
3355             *stream_spec = *arg == ':' ? arg + 1 : "";
3356             break;
3357         case 'c':
3358         case 'p':
3359             if (*(++arg) == ':')
3360                 *index = strtol(++arg, NULL, 0);
3361             break;
3362         default:
3363             av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
3364             exit_program(1);
3365         }
3366     } else
3367         *type = 'g';
3368 }
3369
3370 static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
3371 {
3372     AVDictionary **meta_in = NULL;
3373     AVDictionary **meta_out;
3374     int i, ret = 0;
3375     char type_in, type_out;
3376     const char *istream_spec = NULL, *ostream_spec = NULL;
3377     int idx_in = 0, idx_out = 0;
3378
3379     parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
3380     parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
3381
3382     if (type_in == 'g' || type_out == 'g')
3383         o->metadata_global_manual = 1;
3384     if (type_in == 's' || type_out == 's')
3385         o->metadata_streams_manual = 1;
3386     if (type_in == 'c' || type_out == 'c')
3387         o->metadata_chapters_manual = 1;
3388
3389 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
3390     if ((index) < 0 || (index) >= (nb_elems)) {\
3391         av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
3392                 (desc), (index));\
3393         exit_program(1);\
3394     }
3395
3396 #define SET_DICT(type, meta, context, index)\
3397         switch (type) {\
3398         case 'g':\
3399             meta = &context->metadata;\
3400             break;\
3401         case 'c':\
3402             METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
3403             meta = &context->chapters[index]->metadata;\
3404             break;\
3405         case 'p':\
3406             METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
3407             meta = &context->programs[index]->metadata;\
3408             break;\
3409         }\
3410
3411     SET_DICT(type_in, meta_in, ic, idx_in);
3412     SET_DICT(type_out, meta_out, oc, idx_out);
3413
3414     /* for input streams choose first matching stream */
3415     if (type_in == 's') {
3416         for (i = 0; i < ic->nb_streams; i++) {
3417             if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
3418                 meta_in = &ic->streams[i]->metadata;
3419                 break;
3420             } else if (ret < 0)
3421                 exit_program(1);
3422         }
3423         if (!meta_in) {
3424             av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
3425             exit_program(1);
3426         }
3427     }
3428
3429     if (type_out == 's') {
3430         for (i = 0; i < oc->nb_streams; i++) {
3431             if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
3432                 meta_out = &oc->streams[i]->metadata;
3433                 av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3434             } else if (ret < 0)
3435                 exit_program(1);
3436         }
3437     } else
3438         av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3439
3440     return 0;
3441 }
3442
3443 static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
3444 {
3445     const char *codec_string = encoder ? "encoder" : "decoder";
3446     AVCodec *codec;
3447
3448     codec = encoder ?
3449         avcodec_find_encoder_by_name(name) :
3450         avcodec_find_decoder_by_name(name);
3451     if (!codec) {
3452         av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
3453         exit_program(1);
3454     }
3455     if (codec->type != type) {
3456         av_log(NULL, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
3457         exit_program(1);
3458     }
3459     return codec;
3460 }
3461
3462 static AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVStream *st)
3463 {
3464     char *codec_name = NULL;
3465
3466     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
3467     if (codec_name) {
3468         AVCodec *codec = find_codec_or_die(codec_name, st->codec->codec_type, 0);
3469         st->codec->codec_id = codec->id;
3470         return codec;
3471     } else
3472         return avcodec_find_decoder(st->codec->codec_id);
3473 }
3474
3475 /**
3476  * Add all the streams from the given input file to the global
3477  * list of input streams.
3478  */
3479 static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
3480 {
3481     int i;
3482
3483     for (i = 0; i < ic->nb_streams; i++) {
3484         AVStream *st = ic->streams[i];
3485         AVCodecContext *dec = st->codec;
3486         InputStream *ist = av_mallocz(sizeof(*ist));
3487
3488         if (!ist)
3489             exit_program(1);
3490
3491         input_streams = grow_array(input_streams, sizeof(*input_streams), &nb_input_streams, nb_input_streams + 1);
3492         input_streams[nb_input_streams - 1] = ist;
3493
3494         ist->st = st;
3495         ist->file_index = nb_input_files;
3496         ist->discard = 1;
3497         st->discard  = AVDISCARD_ALL;
3498         ist->opts = filter_codec_opts(codec_opts, ist->st->codec->codec_id, ic, st);
3499
3500         ist->ts_scale = 1.0;
3501         MATCH_PER_STREAM_OPT(ts_scale, dbl, ist->ts_scale, ic, st);
3502
3503         ist->dec = choose_decoder(o, ic, st);
3504
3505         switch (dec->codec_type) {
3506         case AVMEDIA_TYPE_VIDEO:
3507             ist->resample_height  = dec->height;
3508             ist->resample_width   = dec->width;
3509             ist->resample_pix_fmt = dec->pix_fmt;
3510
3511             break;
3512         case AVMEDIA_TYPE_AUDIO:
3513             guess_input_channel_layout(ist);
3514
3515             ist->resample_sample_fmt     = dec->sample_fmt;
3516             ist->resample_sample_rate    = dec->sample_rate;
3517             ist->resample_channels       = dec->channels;
3518             ist->resample_channel_layout = dec->channel_layout;
3519
3520             break;
3521         case AVMEDIA_TYPE_DATA:
3522         case AVMEDIA_TYPE_SUBTITLE:
3523         case AVMEDIA_TYPE_ATTACHMENT:
3524         case AVMEDIA_TYPE_UNKNOWN:
3525             break;
3526         default:
3527             abort();
3528         }
3529     }
3530 }
3531
3532 static void assert_file_overwrite(const char *filename)
3533 {
3534     if (!file_overwrite &&
3535         (strchr(filename, ':') == NULL || filename[1] == ':' ||
3536          av_strstart(filename, "file:", NULL))) {
3537         if (avio_check(filename, 0) == 0) {
3538             if (!using_stdin) {
3539                 fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
3540                 fflush(stderr);
3541                 if (!read_yesno()) {
3542                     fprintf(stderr, "Not overwriting - exiting\n");
3543                     exit_program(1);
3544                 }
3545             }
3546             else {
3547                 fprintf(stderr,"File '%s' already exists. Exiting.\n", filename);
3548                 exit_program(1);
3549             }
3550         }
3551     }
3552 }
3553
3554 static void dump_attachment(AVStream *st, const char *filename)
3555 {
3556     int ret;
3557     AVIOContext *out = NULL;
3558     AVDictionaryEntry *e;
3559
3560     if (!st->codec->extradata_size) {
3561         av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
3562                nb_input_files - 1, st->index);
3563         return;
3564     }
3565     if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
3566         filename = e->value;
3567     if (!*filename) {
3568         av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
3569                "in stream #%d:%d.\n", nb_input_files - 1, st->index);
3570         exit_program(1);
3571     }
3572
3573     assert_file_overwrite(filename);
3574
3575     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
3576         av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
3577                filename);
3578         exit_program(1);
3579     }
3580
3581     avio_write(out, st->codec->extradata, st->codec->extradata_size);
3582     avio_flush(out);
3583     avio_close(out);
3584 }
3585
3586 static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
3587 {
3588     AVFormatContext *ic;
3589     AVInputFormat *file_iformat = NULL;
3590     int err, i, ret;
3591     int64_t timestamp;
3592     uint8_t buf[128];
3593     AVDictionary **opts;
3594     int orig_nb_streams;                     // number of streams before avformat_find_stream_info
3595
3596     if (o->format) {
3597         if (!(file_iformat = av_find_input_format(o->format))) {
3598             av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
3599             exit_program(1);
3600         }
3601     }
3602
3603     if (!strcmp(filename, "-"))
3604         filename = "pipe:";
3605
3606     using_stdin |= !strncmp(filename, "pipe:", 5) ||
3607                     !strcmp(filename, "/dev/stdin");
3608
3609     /* get default parameters from command line */
3610     ic = avformat_alloc_context();
3611     if (!ic) {
3612         print_error(filename, AVERROR(ENOMEM));
3613         exit_program(1);
3614     }
3615     if (o->nb_audio_sample_rate) {
3616         snprintf(buf, sizeof(buf), "%d", o->audio_sample_rate[o->nb_audio_sample_rate - 1].u.i);
3617         av_dict_set(&format_opts, "sample_rate", buf, 0);
3618     }
3619     if (o->nb_audio_channels) {
3620         /* because we set audio_channels based on both the "ac" and
3621          * "channel_layout" options, we need to check that the specified
3622          * demuxer actually has the "channels" option before setting it */
3623         if (file_iformat && file_iformat->priv_class &&
3624             av_opt_find(&file_iformat->priv_class, "channels", NULL, 0,
3625                         AV_OPT_SEARCH_FAKE_OBJ)) {
3626             snprintf(buf, sizeof(buf), "%d",
3627                      o->audio_channels[o->nb_audio_channels - 1].u.i);
3628             av_dict_set(&format_opts, "channels", buf, 0);
3629         }
3630     }
3631     if (o->nb_frame_rates) {
3632         av_dict_set(&format_opts, "framerate", o->frame_rates[o->nb_frame_rates - 1].u.str, 0);
3633     }
3634     if (o->nb_frame_sizes) {
3635         av_dict_set(&format_opts, "video_size", o->frame_sizes[o->nb_frame_sizes - 1].u.str, 0);
3636     }
3637     if (o->nb_frame_pix_fmts)
3638         av_dict_set(&format_opts, "pixel_format", o->frame_pix_fmts[o->nb_frame_pix_fmts - 1].u.str, 0);
3639
3640     ic->flags |= AVFMT_FLAG_NONBLOCK;
3641     ic->interrupt_callback = int_cb;
3642
3643     /* open the input file with generic libav function */
3644     err = avformat_open_input(&ic, filename, file_iformat, &format_opts);
3645     if (err < 0) {
3646         print_error(filename, err);
3647         exit_program(1);
3648     }
3649     assert_avoptions(format_opts);
3650
3651     /* apply forced codec ids */
3652     for (i = 0; i < ic->nb_streams; i++)
3653         choose_decoder(o, ic, ic->streams[i]);
3654
3655     /* Set AVCodecContext options for avformat_find_stream_info */
3656     opts = setup_find_stream_info_opts(ic, codec_opts);
3657     orig_nb_streams = ic->nb_streams;
3658
3659     /* If not enough info to get the stream parameters, we decode the
3660        first frames to get it. (used in mpeg case for example) */
3661     ret = avformat_find_stream_info(ic, opts);
3662     if (ret < 0) {
3663         av_log(NULL, AV_LOG_FATAL, "%s: could not find codec parameters\n", filename);
3664         avformat_close_input(&ic);
3665         exit_program(1);
3666     }
3667
3668     timestamp = o->start_time;
3669     /* add the stream start time */
3670     if (ic->start_time != AV_NOPTS_VALUE)
3671         timestamp += ic->start_time;
3672
3673     /* if seeking requested, we execute it */
3674     if (o->start_time != 0) {
3675         ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
3676         if (ret < 0) {
3677             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
3678                    filename, (double)timestamp / AV_TIME_BASE);
3679         }
3680     }
3681
3682     /* update the current parameters so that they match the one of the input stream */
3683     add_input_streams(o, ic);
3684
3685     /* dump the file content */
3686     av_dump_format(ic, nb_input_files, filename, 0);
3687
3688     input_files = grow_array(input_files, sizeof(*input_files), &nb_input_files, nb_input_files + 1);
3689     if (!(input_files[nb_input_files - 1] = av_mallocz(sizeof(*input_files[0]))))
3690         exit_program(1);
3691
3692     input_files[nb_input_files - 1]->ctx        = ic;
3693     input_files[nb_input_files - 1]->ist_index  = nb_input_streams - ic->nb_streams;
3694     input_files[nb_input_files - 1]->ts_offset  = o->input_ts_offset - (copy_ts ? 0 : timestamp);
3695     input_files[nb_input_files - 1]->nb_streams = ic->nb_streams;
3696     input_files[nb_input_files - 1]->rate_emu   = o->rate_emu;
3697
3698     for (i = 0; i < o->nb_dump_attachment; i++) {
3699         int j;
3700
3701         for (j = 0; j < ic->nb_streams; j++) {
3702             AVStream *st = ic->streams[j];
3703
3704             if (check_stream_specifier(ic, st, o->dump_attachment[i].specifier) == 1)
3705                 dump_attachment(st, o->dump_attachment[i].u.str);
3706         }
3707     }
3708
3709     for (i = 0; i < orig_nb_streams; i++)
3710         av_dict_free(&opts[i]);
3711     av_freep(&opts);
3712
3713     reset_options(o);
3714     return 0;
3715 }
3716
3717 static void parse_forced_key_frames(char *kf, OutputStream *ost,
3718                                     AVCodecContext *avctx)
3719 {
3720     char *p;
3721     int n = 1, i;
3722     int64_t t;
3723
3724     for (p = kf; *p; p++)
3725         if (*p == ',')
3726             n++;
3727     ost->forced_kf_count = n;
3728     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
3729     if (!ost->forced_kf_pts) {
3730         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
3731         exit_program(1);
3732     }
3733     for (i = 0; i < n; i++) {
3734         p = i ? strchr(p, ',') + 1 : kf;
3735         t = parse_time_or_die("force_key_frames", p, 1);
3736         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
3737     }
3738 }
3739
3740 static uint8_t *get_line(AVIOContext *s)
3741 {
3742     AVIOContext *line;
3743     uint8_t *buf;
3744     char c;
3745
3746     if (avio_open_dyn_buf(&line) < 0) {
3747         av_log(NULL, AV_LOG_FATAL, "Could not alloc buffer for reading preset.\n");
3748         exit_program(1);
3749     }
3750
3751     while ((c = avio_r8(s)) && c != '\n')
3752         avio_w8(line, c);
3753     avio_w8(line, 0);
3754     avio_close_dyn_buf(line, &buf);
3755
3756     return buf;
3757 }
3758
3759 static int get_preset_file_2(const char *preset_name, const char *codec_name, AVIOContext **s)
3760 {
3761     int i, ret = 1;
3762     char filename[1000];
3763     const char *base[3] = { getenv("AVCONV_DATADIR"),
3764                             getenv("HOME"),
3765                             AVCONV_DATADIR,
3766                             };
3767
3768     for (i = 0; i < FF_ARRAY_ELEMS(base) && ret; i++) {
3769         if (!base[i])
3770             continue;
3771         if (codec_name) {
3772             snprintf(filename, sizeof(filename), "%s%s/%s-%s.avpreset", base[i],
3773                      i != 1 ? "" : "/.avconv", codec_name, preset_name);
3774             ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
3775         }
3776         if (ret) {
3777             snprintf(filename, sizeof(filename), "%s%s/%s.avpreset", base[i],
3778                      i != 1 ? "" : "/.avconv", preset_name);
3779             ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
3780         }
3781     }
3782     return ret;
3783 }
3784
3785 static void choose_encoder(OptionsContext *o, AVFormatContext *s, OutputStream *ost)
3786 {
3787     char *codec_name = NULL;
3788
3789     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, ost->st);
3790     if (!codec_name) {
3791         ost->st->codec->codec_id = av_guess_codec(s->oformat, NULL, s->filename,
3792                                                   NULL, ost->st->codec->codec_type);
3793         ost->enc = avcodec_find_encoder(ost->st->codec->codec_id);
3794     } else if (!strcmp(codec_name, "copy"))
3795         ost->stream_copy = 1;
3796     else {
3797         ost->enc = find_codec_or_die(codec_name, ost->st->codec->codec_type, 1);
3798         ost->st->codec->codec_id = ost->enc->id;
3799     }
3800 }
3801
3802 static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, enum AVMediaType type)
3803 {
3804     OutputStream *ost;
3805     AVStream *st = avformat_new_stream(oc, NULL);
3806     int idx      = oc->nb_streams - 1, ret = 0;
3807     char *bsf = NULL, *next, *codec_tag = NULL;
3808     AVBitStreamFilterContext *bsfc, *bsfc_prev = NULL;
3809     double qscale = -1;
3810     char *buf = NULL, *arg = NULL, *preset = NULL;
3811     AVIOContext *s = NULL;
3812
3813     if (!st) {
3814         av_log(NULL, AV_LOG_FATAL, "Could not alloc stream.\n");
3815         exit_program(1);
3816     }
3817
3818     if (oc->nb_streams - 1 < o->nb_streamid_map)
3819         st->id = o->streamid_map[oc->nb_streams - 1];
3820
3821     output_streams = grow_array(output_streams, sizeof(*output_streams), &nb_output_streams,
3822                                 nb_output_streams + 1);
3823     if (!(ost = av_mallocz(sizeof(*ost))))
3824         exit_program(1);
3825     output_streams[nb_output_streams - 1] = ost;
3826
3827     ost->file_index = nb_output_files;
3828     ost->index      = idx;
3829     ost->st         = st;
3830     st->codec->codec_type = type;
3831     choose_encoder(o, oc, ost);
3832     if (ost->enc) {
3833         ost->opts  = filter_codec_opts(codec_opts, ost->enc->id, oc, st);
3834     }
3835
3836     avcodec_get_context_defaults3(st->codec, ost->enc);
3837     st->codec->codec_type = type; // XXX hack, avcodec_get_context_defaults2() sets type to unknown for stream copy
3838
3839     MATCH_PER_STREAM_OPT(presets, str, preset, oc, st);
3840     if (preset && (!(ret = get_preset_file_2(preset, ost->enc->name, &s)))) {
3841         do  {
3842             buf = get_line(s);
3843             if (!buf[0] || buf[0] == '#') {
3844                 av_free(buf);
3845                 continue;
3846             }
3847             if (!(arg = strchr(buf, '='))) {
3848                 av_log(NULL, AV_LOG_FATAL, "Invalid line found in the preset file.\n");
3849                 exit_program(1);
3850             }
3851             *arg++ = 0;
3852             av_dict_set(&ost->opts, buf, arg, AV_DICT_DONT_OVERWRITE);
3853             av_free(buf);
3854         } while (!s->eof_reached);
3855         avio_close(s);
3856     }
3857     if (ret) {
3858         av_log(NULL, AV_LOG_FATAL,
3859                "Preset %s specified for stream %d:%d, but could not be opened.\n",
3860                preset, ost->file_index, ost->index);
3861         exit_program(1);
3862     }
3863
3864     ost->max_frames = INT64_MAX;
3865     MATCH_PER_STREAM_OPT(max_frames, i64, ost->max_frames, oc, st);
3866
3867     MATCH_PER_STREAM_OPT(bitstream_filters, str, bsf, oc, st);
3868     while (bsf) {
3869         if (next = strchr(bsf, ','))
3870             *next++ = 0;
3871         if (!(bsfc = av_bitstream_filter_init(bsf))) {
3872             av_log(NULL, AV_LOG_FATAL, "Unknown bitstream filter %s\n", bsf);
3873             exit_program(1);
3874         }
3875         if (bsfc_prev)
3876             bsfc_prev->next = bsfc;
3877         else
3878             ost->bitstream_filters = bsfc;
3879
3880         bsfc_prev = bsfc;
3881         bsf       = next;
3882     }
3883
3884     MATCH_PER_STREAM_OPT(codec_tags, str, codec_tag, oc, st);
3885     if (codec_tag) {
3886         uint32_t tag = strtol(codec_tag, &next, 0);
3887         if (*next)
3888             tag = AV_RL32(codec_tag);
3889         st->codec->codec_tag = tag;
3890     }
3891
3892     MATCH_PER_STREAM_OPT(qscale, dbl, qscale, oc, st);
3893     if (qscale >= 0 || same_quant) {
3894         st->codec->flags |= CODEC_FLAG_QSCALE;
3895         st->codec->global_quality = FF_QP2LAMBDA * qscale;
3896     }
3897
3898     if (oc->oformat->flags & AVFMT_GLOBALHEADER)
3899         st->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
3900
3901     av_opt_get_int(sws_opts, "sws_flags", 0, &ost->sws_flags);
3902
3903     ost->pix_fmts[0] = ost->pix_fmts[1] = PIX_FMT_NONE;
3904
3905     return ost;
3906 }
3907
3908 static void parse_matrix_coeffs(uint16_t *dest, const char *str)
3909 {
3910     int i;
3911     const char *p = str;
3912     for (i = 0;; i++) {
3913         dest[i] = atoi(p);
3914         if (i == 63)
3915             break;
3916         p = strchr(p, ',');
3917         if (!p) {
3918             av_log(NULL, AV_LOG_FATAL, "Syntax error in matrix \"%s\" at coeff %d\n", str, i);
3919             exit_program(1);
3920         }
3921         p++;
3922     }
3923 }
3924
3925 static OutputStream *new_video_stream(OptionsContext *o, AVFormatContext *oc)
3926 {
3927     AVStream *st;
3928     OutputStream *ost;
3929     AVCodecContext *video_enc;
3930
3931     ost = new_output_stream(o, oc, AVMEDIA_TYPE_VIDEO);
3932     st  = ost->st;
3933     video_enc = st->codec;
3934
3935     if (!ost->stream_copy) {
3936         const char *p = NULL;
3937         char *forced_key_frames = NULL, *frame_rate = NULL, *frame_size = NULL;
3938         char *frame_aspect_ratio = NULL, *frame_pix_fmt = NULL;
3939         char *intra_matrix = NULL, *inter_matrix = NULL, *filters = NULL;
3940         int i;
3941
3942         MATCH_PER_STREAM_OPT(frame_rates, str, frame_rate, oc, st);
3943         if (frame_rate && av_parse_video_rate(&ost->frame_rate, frame_rate) < 0) {
3944             av_log(NULL, AV_LOG_FATAL, "Invalid framerate value: %s\n", frame_rate);
3945             exit_program(1);
3946         }
3947
3948         MATCH_PER_STREAM_OPT(frame_sizes, str, frame_size, oc, st);
3949         if (frame_size && av_parse_video_size(&video_enc->width, &video_enc->height, frame_size) < 0) {
3950             av_log(NULL, AV_LOG_FATAL, "Invalid frame size: %s.\n", frame_size);
3951             exit_program(1);
3952         }
3953
3954         MATCH_PER_STREAM_OPT(frame_aspect_ratios, str, frame_aspect_ratio, oc, st);
3955         if (frame_aspect_ratio)
3956             ost->frame_aspect_ratio = parse_frame_aspect_ratio(frame_aspect_ratio);
3957
3958         MATCH_PER_STREAM_OPT(frame_pix_fmts, str, frame_pix_fmt, oc, st);
3959         if (frame_pix_fmt && (video_enc->pix_fmt = av_get_pix_fmt(frame_pix_fmt)) == PIX_FMT_NONE) {
3960             av_log(NULL, AV_LOG_FATAL, "Unknown pixel format requested: %s.\n", frame_pix_fmt);
3961             exit_program(1);
3962         }
3963         st->sample_aspect_ratio = video_enc->sample_aspect_ratio;
3964
3965         MATCH_PER_STREAM_OPT(intra_matrices, str, intra_matrix, oc, st);
3966         if (intra_matrix) {
3967             if (!(video_enc->intra_matrix = av_mallocz(sizeof(*video_enc->intra_matrix) * 64))) {
3968                 av_log(NULL, AV_LOG_FATAL, "Could not allocate memory for intra matrix.\n");
3969                 exit_program(1);
3970             }
3971             parse_matrix_coeffs(video_enc->intra_matrix, intra_matrix);
3972         }
3973         MATCH_PER_STREAM_OPT(inter_matrices, str, inter_matrix, oc, st);
3974         if (inter_matrix) {
3975             if (!(video_enc->inter_matrix = av_mallocz(sizeof(*video_enc->inter_matrix) * 64))) {
3976                 av_log(NULL, AV_LOG_FATAL, "Could not allocate memory for inter matrix.\n");
3977                 exit_program(1);
3978             }
3979             parse_matrix_coeffs(video_enc->inter_matrix, inter_matrix);
3980         }
3981
3982         MATCH_PER_STREAM_OPT(rc_overrides, str, p, oc, st);
3983         for (i = 0; p; i++) {
3984             int start, end, q;
3985             int e = sscanf(p, "%d,%d,%d", &start, &end, &q);
3986             if (e != 3) {
3987                 av_log(NULL, AV_LOG_FATAL, "error parsing rc_override\n");
3988                 exit_program(1);
3989             }
3990             video_enc->rc_override =
3991                 av_realloc(video_enc->rc_override,
3992                            sizeof(RcOverride) * (i + 1));
3993             video_enc->rc_override[i].start_frame = start;
3994             video_enc->rc_override[i].end_frame   = end;
3995             if (q > 0) {
3996                 video_enc->rc_override[i].qscale         = q;
3997                 video_enc->rc_override[i].quality_factor = 1.0;
3998             }
3999             else {
4000                 video_enc->rc_override[i].qscale         = 0;
4001                 video_enc->rc_override[i].quality_factor = -q/100.0;
4002             }
4003             p = strchr(p, '/');
4004             if (p) p++;
4005         }
4006         video_enc->rc_override_count = i;
4007         if (!video_enc->rc_initial_buffer_occupancy)
4008             video_enc->rc_initial_buffer_occupancy = video_enc->rc_buffer_size * 3 / 4;
4009         video_enc->intra_dc_precision = intra_dc_precision - 8;
4010
4011         /* two pass mode */
4012         if (do_pass) {
4013             if (do_pass == 1) {
4014                 video_enc->flags |= CODEC_FLAG_PASS1;
4015             } else {
4016                 video_enc->flags |= CODEC_FLAG_PASS2;
4017             }
4018         }
4019
4020         MATCH_PER_STREAM_OPT(forced_key_frames, str, forced_key_frames, oc, st);
4021         if (forced_key_frames)
4022             parse_forced_key_frames(forced_key_frames, ost, video_enc);
4023
4024         MATCH_PER_STREAM_OPT(force_fps, i, ost->force_fps, oc, st);
4025
4026         ost->top_field_first = -1;
4027         MATCH_PER_STREAM_OPT(top_field_first, i, ost->top_field_first, oc, st);
4028
4029         MATCH_PER_STREAM_OPT(filters, str, filters, oc, st);
4030         if (filters)
4031             ost->avfilter = av_strdup(filters);
4032     } else {
4033         MATCH_PER_STREAM_OPT(copy_initial_nonkeyframes, i, ost->copy_initial_nonkeyframes, oc ,st);
4034     }
4035
4036     return ost;
4037 }
4038
4039 static OutputStream *new_audio_stream(OptionsContext *o, AVFormatContext *oc)
4040 {
4041     AVStream *st;
4042     OutputStream *ost;
4043     AVCodecContext *audio_enc;
4044
4045     ost = new_output_stream(o, oc, AVMEDIA_TYPE_AUDIO);
4046     st  = ost->st;
4047
4048     audio_enc = st->codec;
4049     audio_enc->codec_type = AVMEDIA_TYPE_AUDIO;
4050
4051     if (!ost->stream_copy) {
4052         char *sample_fmt = NULL, *filters = NULL;;
4053
4054         MATCH_PER_STREAM_OPT(audio_channels, i, audio_enc->channels, oc, st);
4055
4056         MATCH_PER_STREAM_OPT(sample_fmts, str, sample_fmt, oc, st);
4057         if (sample_fmt &&
4058             (audio_enc->sample_fmt = av_get_sample_fmt(sample_fmt)) == AV_SAMPLE_FMT_NONE) {
4059             av_log(NULL, AV_LOG_FATAL, "Invalid sample format '%s'\n", sample_fmt);
4060             exit_program(1);
4061         }
4062
4063         MATCH_PER_STREAM_OPT(audio_sample_rate, i, audio_enc->sample_rate, oc, st);
4064
4065         MATCH_PER_STREAM_OPT(filters, str, filters, oc, st);
4066         if (filters)
4067             ost->avfilter = av_strdup(filters);
4068     }
4069
4070     return ost;
4071 }
4072
4073 static OutputStream *new_data_stream(OptionsContext *o, AVFormatContext *oc)
4074 {
4075     OutputStream *ost;
4076
4077     ost = new_output_stream(o, oc, AVMEDIA_TYPE_DATA);
4078     if (!ost->stream_copy) {
4079         av_log(NULL, AV_LOG_FATAL, "Data stream encoding not supported yet (only streamcopy)\n");
4080         exit_program(1);
4081     }
4082
4083     return ost;
4084 }
4085
4086 static OutputStream *new_attachment_stream(OptionsContext *o, AVFormatContext *oc)
4087 {
4088     OutputStream *ost = new_output_stream(o, oc, AVMEDIA_TYPE_ATTACHMENT);
4089     ost->stream_copy = 1;
4090     return ost;
4091 }
4092
4093 static OutputStream *new_subtitle_stream(OptionsContext *o, AVFormatContext *oc)
4094 {
4095     AVStream *st;
4096     OutputStream *ost;
4097     AVCodecContext *subtitle_enc;
4098
4099     ost = new_output_stream(o, oc, AVMEDIA_TYPE_SUBTITLE);
4100     st  = ost->st;
4101     subtitle_enc = st->codec;
4102
4103     subtitle_enc->codec_type = AVMEDIA_TYPE_SUBTITLE;
4104
4105     return ost;
4106 }
4107
4108 /* arg format is "output-stream-index:streamid-value". */
4109 static int opt_streamid(OptionsContext *o, const char *opt, const char *arg)
4110 {
4111     int idx;
4112     char *p;
4113     char idx_str[16];
4114
4115     av_strlcpy(idx_str, arg, sizeof(idx_str));
4116     p = strchr(idx_str, ':');
4117     if (!p) {
4118         av_log(NULL, AV_LOG_FATAL,
4119                "Invalid value '%s' for option '%s', required syntax is 'index:value'\n",
4120                arg, opt);
4121         exit_program(1);
4122     }
4123     *p++ = '\0';
4124     idx = parse_number_or_die(opt, idx_str, OPT_INT, 0, INT_MAX);
4125     o->streamid_map = grow_array(o->streamid_map, sizeof(*o->streamid_map), &o->nb_streamid_map, idx+1);
4126     o->streamid_map[idx] = parse_number_or_die(opt, p, OPT_INT, 0, INT_MAX);
4127     return 0;
4128 }
4129
4130 static int copy_chapters(InputFile *ifile, OutputFile *ofile, int copy_metadata)
4131 {
4132     AVFormatContext *is = ifile->ctx;
4133     AVFormatContext *os = ofile->ctx;
4134     int i;
4135
4136     for (i = 0; i < is->nb_chapters; i++) {
4137         AVChapter *in_ch = is->chapters[i], *out_ch;
4138         int64_t ts_off   = av_rescale_q(ofile->start_time - ifile->ts_offset,
4139                                        AV_TIME_BASE_Q, in_ch->time_base);
4140         int64_t rt       = (ofile->recording_time == INT64_MAX) ? INT64_MAX :
4141                            av_rescale_q(ofile->recording_time, AV_TIME_BASE_Q, in_ch->time_base);
4142
4143
4144         if (in_ch->end < ts_off)
4145             continue;
4146         if (rt != INT64_MAX && in_ch->start > rt + ts_off)
4147             break;
4148
4149         out_ch = av_mallocz(sizeof(AVChapter));
4150         if (!out_ch)
4151             return AVERROR(ENOMEM);
4152
4153         out_ch->id        = in_ch->id;
4154         out_ch->time_base = in_ch->time_base;
4155         out_ch->start     = FFMAX(0,  in_ch->start - ts_off);
4156         out_ch->end       = FFMIN(rt, in_ch->end   - ts_off);
4157
4158         if (copy_metadata)
4159             av_dict_copy(&out_ch->metadata, in_ch->metadata, 0);
4160
4161         os->nb_chapters++;
4162         os->chapters = av_realloc(os->chapters, sizeof(AVChapter) * os->nb_chapters);
4163         if (!os->chapters)
4164             return AVERROR(ENOMEM);
4165         os->chapters[os->nb_chapters - 1] = out_ch;
4166     }
4167     return 0;
4168 }
4169
4170 static void init_output_filter(OutputFilter *ofilter, OptionsContext *o,
4171                                AVFormatContext *oc)
4172 {
4173     OutputStream *ost;
4174
4175     switch (ofilter->out_tmp->filter_ctx->output_pads[ofilter->out_tmp->pad_idx].type) {
4176     case AVMEDIA_TYPE_VIDEO: ost = new_video_stream(o, oc); break;
4177     case AVMEDIA_TYPE_AUDIO: ost = new_audio_stream(o, oc); break;
4178     default:
4179         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters are supported "
4180                "currently.\n");
4181         exit_program(1);
4182     }
4183
4184     ost->source_index = -1;
4185     ost->filter       = ofilter;
4186
4187     ofilter->ost      = ost;
4188
4189     if (ost->stream_copy) {
4190         av_log(NULL, AV_LOG_ERROR, "Streamcopy requested for output stream %d:%d, "
4191                "which is fed from a complex filtergraph. Filtering and streamcopy "
4192                "cannot be used together.\n", ost->file_index, ost->index);
4193         exit_program(1);
4194     }
4195
4196     if (configure_output_filter(ofilter->graph, ofilter, ofilter->out_tmp) < 0) {
4197         av_log(NULL, AV_LOG_FATAL, "Error configuring filter.\n");
4198         exit_program(1);
4199     }
4200     avfilter_inout_free(&ofilter->out_tmp);
4201 }
4202
4203 static void opt_output_file(void *optctx, const char *filename)
4204 {
4205     OptionsContext *o = optctx;
4206     AVFormatContext *oc;
4207     int i, j, err;
4208     AVOutputFormat *file_oformat;
4209     OutputStream *ost;
4210     InputStream  *ist;
4211
4212     if (configure_complex_filters() < 0) {
4213         av_log(NULL, AV_LOG_FATAL, "Error configuring filters.\n");
4214         exit_program(1);
4215     }
4216
4217     if (!strcmp(filename, "-"))
4218         filename = "pipe:";
4219
4220     oc = avformat_alloc_context();
4221     if (!oc) {
4222         print_error(filename, AVERROR(ENOMEM));
4223         exit_program(1);
4224     }
4225
4226     if (o->format) {
4227         file_oformat = av_guess_format(o->format, NULL, NULL);
4228         if (!file_oformat) {
4229             av_log(NULL, AV_LOG_FATAL, "Requested output format '%s' is not a suitable output format\n", o->format);
4230             exit_program(1);
4231         }
4232     } else {
4233         file_oformat = av_guess_format(NULL, filename, NULL);
4234         if (!file_oformat) {
4235             av_log(NULL, AV_LOG_FATAL, "Unable to find a suitable output format for '%s'\n",
4236                    filename);
4237             exit_program(1);
4238         }
4239     }
4240
4241     oc->oformat = file_oformat;
4242     oc->interrupt_callback = int_cb;
4243     av_strlcpy(oc->filename, filename, sizeof(oc->filename));
4244
4245     /* create streams for all unlabeled output pads */
4246     for (i = 0; i < nb_filtergraphs; i++) {
4247         FilterGraph *fg = filtergraphs[i];
4248         for (j = 0; j < fg->nb_outputs; j++) {
4249             OutputFilter *ofilter = fg->outputs[j];
4250
4251             if (!ofilter->out_tmp || ofilter->out_tmp->name)
4252                 continue;
4253
4254             switch (ofilter->out_tmp->filter_ctx->output_pads[ofilter->out_tmp->pad_idx].type) {
4255             case AVMEDIA_TYPE_VIDEO:    o->video_disable    = 1; break;
4256             case AVMEDIA_TYPE_AUDIO:    o->audio_disable    = 1; break;
4257             case AVMEDIA_TYPE_SUBTITLE: o->subtitle_disable = 1; break;
4258             }
4259             init_output_filter(ofilter, o, oc);
4260         }
4261     }
4262
4263     if (!o->nb_stream_maps) {
4264         /* pick the "best" stream of each type */
4265 #define NEW_STREAM(type, index)\
4266         if (index >= 0) {\
4267             ost = new_ ## type ## _stream(o, oc);\
4268             ost->source_index = index;\
4269             ost->sync_ist     = input_streams[index];\
4270             input_streams[index]->discard = 0;\
4271             input_streams[index]->st->discard = AVDISCARD_NONE;\
4272         }
4273
4274         /* video: highest resolution */
4275         if (!o->video_disable && oc->oformat->video_codec != CODEC_ID_NONE) {
4276             int area = 0, idx = -1;
4277             for (i = 0; i < nb_input_streams; i++) {
4278                 ist = input_streams[i];
4279                 if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
4280                     ist->st->codec->width * ist->st->codec->height > area) {
4281                     area = ist->st->codec->width * ist->st->codec->height;
4282                     idx = i;
4283                 }
4284             }
4285             NEW_STREAM(video, idx);
4286         }
4287
4288         /* audio: most channels */
4289         if (!o->audio_disable && oc->oformat->audio_codec != CODEC_ID_NONE) {
4290             int channels = 0, idx = -1;
4291             for (i = 0; i < nb_input_streams; i++) {
4292                 ist = input_streams[i];
4293                 if (ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
4294                     ist->st->codec->channels > channels) {
4295                     channels = ist->st->codec->channels;
4296                     idx = i;
4297                 }
4298             }
4299             NEW_STREAM(audio, idx);
4300         }
4301
4302         /* subtitles: pick first */
4303         if (!o->subtitle_disable && oc->oformat->subtitle_codec != CODEC_ID_NONE) {
4304             for (i = 0; i < nb_input_streams; i++)
4305                 if (input_streams[i]->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
4306                     NEW_STREAM(subtitle, i);
4307                     break;
4308                 }
4309         }
4310         /* do something with data? */
4311     } else {
4312         for (i = 0; i < o->nb_stream_maps; i++) {
4313             StreamMap *map = &o->stream_maps[i];
4314
4315             if (map->disabled)
4316                 continue;
4317
4318             if (map->linklabel) {
4319                 FilterGraph *fg;
4320                 OutputFilter *ofilter = NULL;
4321                 int j, k;
4322
4323                 for (j = 0; j < nb_filtergraphs; j++) {
4324                     fg = filtergraphs[j];
4325                     for (k = 0; k < fg->nb_outputs; k++) {
4326                         AVFilterInOut *out = fg->outputs[k]->out_tmp;
4327                         if (out && !strcmp(out->name, map->linklabel)) {
4328                             ofilter = fg->outputs[k];
4329                             goto loop_end;
4330                         }
4331                     }
4332                 }
4333 loop_end:
4334                 if (!ofilter) {
4335                     av_log(NULL, AV_LOG_FATAL, "Output with label '%s' does not exist "
4336                            "in any defined filter graph.\n", map->linklabel);
4337                     exit_program(1);
4338                 }
4339                 init_output_filter(ofilter, o, oc);
4340             } else {
4341                 ist = input_streams[input_files[map->file_index]->ist_index + map->stream_index];
4342                 switch (ist->st->codec->codec_type) {
4343                 case AVMEDIA_TYPE_VIDEO:    ost = new_video_stream(o, oc);    break;
4344                 case AVMEDIA_TYPE_AUDIO:    ost = new_audio_stream(o, oc);    break;
4345                 case AVMEDIA_TYPE_SUBTITLE: ost = new_subtitle_stream(o, oc); break;
4346                 case AVMEDIA_TYPE_DATA:     ost = new_data_stream(o, oc);     break;
4347                 case AVMEDIA_TYPE_ATTACHMENT: ost = new_attachment_stream(o, oc); break;
4348                 default:
4349                     av_log(NULL, AV_LOG_FATAL, "Cannot map stream #%d:%d - unsupported type.\n",
4350                            map->file_index, map->stream_index);
4351                     exit_program(1);
4352                 }
4353
4354                 ost->source_index = input_files[map->file_index]->ist_index + map->stream_index;
4355                 ost->sync_ist     = input_streams[input_files[map->sync_file_index]->ist_index +
4356                                                map->sync_stream_index];
4357                 ist->discard = 0;
4358                 ist->st->discard = AVDISCARD_NONE;
4359             }
4360         }
4361     }
4362
4363     /* handle attached files */