adpcm: Check for channels to be a non-zero integer
[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 "libavutil/opt.h"
35 #include "libavcodec/audioconvert.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 "libavformat/os_support.h"
48
49 #if CONFIG_AVFILTER
50 # include "libavfilter/avfilter.h"
51 # include "libavfilter/avfiltergraph.h"
52 # include "libavfilter/vsrc_buffer.h"
53 #endif
54
55 #if HAVE_SYS_RESOURCE_H
56 #include <sys/types.h>
57 #include <sys/time.h>
58 #include <sys/resource.h>
59 #elif HAVE_GETPROCESSTIMES
60 #include <windows.h>
61 #endif
62 #if HAVE_GETPROCESSMEMORYINFO
63 #include <windows.h>
64 #include <psapi.h>
65 #endif
66
67 #if HAVE_SYS_SELECT_H
68 #include <sys/select.h>
69 #endif
70
71 #include <time.h>
72
73 #include "cmdutils.h"
74
75 #include "libavutil/avassert.h"
76
77 const char program_name[] = "avconv";
78 const int program_birth_year = 2000;
79
80 /* select an input stream for an output stream */
81 typedef struct StreamMap {
82     int disabled;           /** 1 is this mapping is disabled by a negative map */
83     int file_index;
84     int stream_index;
85     int sync_file_index;
86     int sync_stream_index;
87 } StreamMap;
88
89 /**
90  * select an input file for an output file
91  */
92 typedef struct MetadataMap {
93     int  file;      ///< file index
94     char type;      ///< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
95     int  index;     ///< stream/chapter/program number
96 } MetadataMap;
97
98 static const OptionDef options[];
99
100 static int video_discard = 0;
101 static int same_quant = 0;
102 static int do_deinterlace = 0;
103 static int intra_dc_precision = 8;
104 static int qp_hist = 0;
105
106 static int file_overwrite = 0;
107 static int do_benchmark = 0;
108 static int do_hex_dump = 0;
109 static int do_pkt_dump = 0;
110 static int do_pass = 0;
111 static char *pass_logfilename_prefix = NULL;
112 static int video_sync_method= -1;
113 static int audio_sync_method= 0;
114 static float audio_drift_threshold= 0.1;
115 static int copy_ts= 0;
116 static int copy_tb = 1;
117 static int opt_shortest = 0;
118 static char *vstats_filename;
119 static FILE *vstats_file;
120
121 static int audio_volume = 256;
122
123 static int exit_on_error = 0;
124 static int using_stdin = 0;
125 static int64_t video_size = 0;
126 static int64_t audio_size = 0;
127 static int64_t extra_size = 0;
128 static int nb_frames_dup = 0;
129 static int nb_frames_drop = 0;
130 static int input_sync;
131
132 static float dts_delta_threshold = 10;
133
134 static int print_stats = 1;
135
136 static uint8_t *audio_buf;
137 static uint8_t *audio_out;
138 static unsigned int allocated_audio_out_size, allocated_audio_buf_size;
139
140 #define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
141
142 typedef struct InputStream {
143     int file_index;
144     AVStream *st;
145     int discard;             /* true if stream data should be discarded */
146     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
147     AVCodec *dec;
148     AVFrame *decoded_frame;
149     AVFrame *filtered_frame;
150
151     int64_t       start;     /* time when read started */
152     int64_t       next_pts;  /* synthetic pts for cases where pkt.pts
153                                 is not defined */
154     int64_t       pts;       /* current pts */
155     PtsCorrectionContext pts_ctx;
156     double ts_scale;
157     int is_start;            /* is 1 at the start and after a discontinuity */
158     int showed_multi_packet_warning;
159     AVDictionary *opts;
160 } InputStream;
161
162 typedef struct InputFile {
163     AVFormatContext *ctx;
164     int eof_reached;      /* true if eof reached */
165     int ist_index;        /* index of first stream in ist_table */
166     int buffer_size;      /* current total buffer size */
167     int64_t ts_offset;
168     int nb_streams;       /* number of stream that avconv is aware of; may be different
169                              from ctx.nb_streams if new streams appear during av_read_frame() */
170     int rate_emu;
171 } InputFile;
172
173 typedef struct OutputStream {
174     int file_index;          /* file index */
175     int index;               /* stream index in the output file */
176     int source_index;        /* InputStream index */
177     AVStream *st;            /* stream in the output file */
178     int encoding_needed;     /* true if encoding needed for this stream */
179     int frame_number;
180     /* input pts and corresponding output pts
181        for A/V sync */
182     //double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
183     struct InputStream *sync_ist; /* input stream to sync against */
184     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ //FIXME look at frame_number
185     AVBitStreamFilterContext *bitstream_filters;
186     AVCodec *enc;
187     int64_t max_frames;
188
189     /* video only */
190     int video_resample;
191     AVFrame pict_tmp;      /* temporary image for resampling */
192     struct SwsContext *img_resample_ctx; /* for image resampling */
193     int resample_height;
194     int resample_width;
195     int resample_pix_fmt;
196     AVRational frame_rate;
197     int force_fps;
198     int top_field_first;
199
200     float frame_aspect_ratio;
201
202     /* forced key frames */
203     int64_t *forced_kf_pts;
204     int forced_kf_count;
205     int forced_kf_index;
206
207     /* audio only */
208     int audio_resample;
209     ReSampleContext *resample; /* for audio resampling */
210     int resample_sample_fmt;
211     int resample_channels;
212     int resample_sample_rate;
213     int reformat_pair;
214     AVAudioConvert *reformat_ctx;
215     AVFifoBuffer *fifo;     /* for compression: one audio fifo per codec */
216     FILE *logfile;
217
218 #if CONFIG_AVFILTER
219     AVFilterContext *output_video_filter;
220     AVFilterContext *input_video_filter;
221     AVFilterBufferRef *picref;
222     char *avfilter;
223     AVFilterGraph *graph;
224 #endif
225
226     int64_t sws_flags;
227     AVDictionary *opts;
228     int is_past_recording_time;
229     int stream_copy;
230     const char *attachment_filename;
231     int copy_initial_nonkeyframes;
232 } OutputStream;
233
234
235 typedef struct OutputFile {
236     AVFormatContext *ctx;
237     AVDictionary *opts;
238     int ost_index;       /* index of the first stream in output_streams */
239     int64_t recording_time; /* desired length of the resulting file in microseconds */
240     int64_t start_time;     /* start time in microseconds */
241     uint64_t limit_filesize;
242 } OutputFile;
243
244 static InputStream *input_streams = NULL;
245 static int         nb_input_streams = 0;
246 static InputFile   *input_files   = NULL;
247 static int         nb_input_files   = 0;
248
249 static OutputStream *output_streams = NULL;
250 static int        nb_output_streams = 0;
251 static OutputFile   *output_files   = NULL;
252 static int        nb_output_files   = 0;
253
254 typedef struct OptionsContext {
255     /* input/output options */
256     int64_t start_time;
257     const char *format;
258
259     SpecifierOpt *codec_names;
260     int        nb_codec_names;
261     SpecifierOpt *audio_channels;
262     int        nb_audio_channels;
263     SpecifierOpt *audio_sample_rate;
264     int        nb_audio_sample_rate;
265     SpecifierOpt *frame_rates;
266     int        nb_frame_rates;
267     SpecifierOpt *frame_sizes;
268     int        nb_frame_sizes;
269     SpecifierOpt *frame_pix_fmts;
270     int        nb_frame_pix_fmts;
271
272     /* input options */
273     int64_t input_ts_offset;
274     int rate_emu;
275
276     SpecifierOpt *ts_scale;
277     int        nb_ts_scale;
278     SpecifierOpt *dump_attachment;
279     int        nb_dump_attachment;
280
281     /* output options */
282     StreamMap *stream_maps;
283     int     nb_stream_maps;
284     /* first item specifies output metadata, second is input */
285     MetadataMap (*meta_data_maps)[2];
286     int nb_meta_data_maps;
287     int metadata_global_manual;
288     int metadata_streams_manual;
289     int metadata_chapters_manual;
290     const char **attachments;
291     int       nb_attachments;
292
293     int chapters_input_file;
294
295     int64_t recording_time;
296     uint64_t limit_filesize;
297     float mux_preload;
298     float mux_max_delay;
299
300     int video_disable;
301     int audio_disable;
302     int subtitle_disable;
303     int data_disable;
304
305     /* indexed by output file stream index */
306     int   *streamid_map;
307     int nb_streamid_map;
308
309     SpecifierOpt *metadata;
310     int        nb_metadata;
311     SpecifierOpt *max_frames;
312     int        nb_max_frames;
313     SpecifierOpt *bitstream_filters;
314     int        nb_bitstream_filters;
315     SpecifierOpt *codec_tags;
316     int        nb_codec_tags;
317     SpecifierOpt *sample_fmts;
318     int        nb_sample_fmts;
319     SpecifierOpt *qscale;
320     int        nb_qscale;
321     SpecifierOpt *forced_key_frames;
322     int        nb_forced_key_frames;
323     SpecifierOpt *force_fps;
324     int        nb_force_fps;
325     SpecifierOpt *frame_aspect_ratios;
326     int        nb_frame_aspect_ratios;
327     SpecifierOpt *rc_overrides;
328     int        nb_rc_overrides;
329     SpecifierOpt *intra_matrices;
330     int        nb_intra_matrices;
331     SpecifierOpt *inter_matrices;
332     int        nb_inter_matrices;
333     SpecifierOpt *top_field_first;
334     int        nb_top_field_first;
335     SpecifierOpt *metadata_map;
336     int        nb_metadata_map;
337     SpecifierOpt *presets;
338     int        nb_presets;
339     SpecifierOpt *copy_initial_nonkeyframes;
340     int        nb_copy_initial_nonkeyframes;
341 #if CONFIG_AVFILTER
342     SpecifierOpt *filters;
343     int        nb_filters;
344 #endif
345 } OptionsContext;
346
347 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
348 {\
349     int i, ret;\
350     for (i = 0; i < o->nb_ ## name; i++) {\
351         char *spec = o->name[i].specifier;\
352         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
353             outvar = o->name[i].u.type;\
354         else if (ret < 0)\
355             exit_program(1);\
356     }\
357 }
358
359 static void reset_options(OptionsContext *o)
360 {
361     const OptionDef *po = options;
362
363     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
364     while (po->name) {
365         void *dst = (uint8_t*)o + po->u.off;
366
367         if (po->flags & OPT_SPEC) {
368             SpecifierOpt **so = dst;
369             int i, *count = (int*)(so + 1);
370             for (i = 0; i < *count; i++) {
371                 av_freep(&(*so)[i].specifier);
372                 if (po->flags & OPT_STRING)
373                     av_freep(&(*so)[i].u.str);
374             }
375             av_freep(so);
376             *count = 0;
377         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
378             av_freep(dst);
379         po++;
380     }
381
382     av_freep(&o->stream_maps);
383     av_freep(&o->meta_data_maps);
384     av_freep(&o->streamid_map);
385
386     memset(o, 0, sizeof(*o));
387
388     o->mux_max_delay  = 0.7;
389     o->recording_time = INT64_MAX;
390     o->limit_filesize = UINT64_MAX;
391     o->chapters_input_file = INT_MAX;
392
393     uninit_opts();
394     init_opts();
395 }
396
397 #if CONFIG_AVFILTER
398
399 static int configure_video_filters(InputStream *ist, OutputStream *ost)
400 {
401     AVFilterContext *last_filter, *filter;
402     /** filter graph containing all filters including input & output */
403     AVCodecContext *codec = ost->st->codec;
404     AVCodecContext *icodec = ist->st->codec;
405     FFSinkContext ffsink_ctx = { .pix_fmt = codec->pix_fmt };
406     AVRational sample_aspect_ratio;
407     char args[255];
408     int ret;
409
410     ost->graph = avfilter_graph_alloc();
411
412     if (ist->st->sample_aspect_ratio.num){
413         sample_aspect_ratio = ist->st->sample_aspect_ratio;
414     }else
415         sample_aspect_ratio = ist->st->codec->sample_aspect_ratio;
416
417     snprintf(args, 255, "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
418              ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
419              sample_aspect_ratio.num, sample_aspect_ratio.den);
420
421     ret = avfilter_graph_create_filter(&ost->input_video_filter, avfilter_get_by_name("buffer"),
422                                        "src", args, NULL, ost->graph);
423     if (ret < 0)
424         return ret;
425     ret = avfilter_graph_create_filter(&ost->output_video_filter, &ffsink,
426                                        "out", NULL, &ffsink_ctx, ost->graph);
427     if (ret < 0)
428         return ret;
429     last_filter = ost->input_video_filter;
430
431     if (codec->width  != icodec->width || codec->height != icodec->height) {
432         snprintf(args, 255, "%d:%d:flags=0x%X",
433                  codec->width,
434                  codec->height,
435                  (unsigned)ost->sws_flags);
436         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
437                                                 NULL, args, NULL, ost->graph)) < 0)
438             return ret;
439         if ((ret = avfilter_link(last_filter, 0, filter, 0)) < 0)
440             return ret;
441         last_filter = filter;
442     }
443
444     snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
445     ost->graph->scale_sws_opts = av_strdup(args);
446
447     if (ost->avfilter) {
448         AVFilterInOut *outputs = av_malloc(sizeof(AVFilterInOut));
449         AVFilterInOut *inputs  = av_malloc(sizeof(AVFilterInOut));
450
451         outputs->name    = av_strdup("in");
452         outputs->filter_ctx = last_filter;
453         outputs->pad_idx = 0;
454         outputs->next    = NULL;
455
456         inputs->name    = av_strdup("out");
457         inputs->filter_ctx = ost->output_video_filter;
458         inputs->pad_idx = 0;
459         inputs->next    = NULL;
460
461         if ((ret = avfilter_graph_parse(ost->graph, ost->avfilter, inputs, outputs, NULL)) < 0)
462             return ret;
463         av_freep(&ost->avfilter);
464     } else {
465         if ((ret = avfilter_link(last_filter, 0, ost->output_video_filter, 0)) < 0)
466             return ret;
467     }
468
469     if ((ret = avfilter_graph_config(ost->graph, NULL)) < 0)
470         return ret;
471
472     codec->width  = ost->output_video_filter->inputs[0]->w;
473     codec->height = ost->output_video_filter->inputs[0]->h;
474     codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
475         ost->frame_aspect_ratio ? // overridden by the -aspect cli option
476         av_d2q(ost->frame_aspect_ratio*codec->height/codec->width, 255) :
477         ost->output_video_filter->inputs[0]->sample_aspect_ratio;
478
479     return 0;
480 }
481 #endif /* CONFIG_AVFILTER */
482
483 static void term_exit(void)
484 {
485     av_log(NULL, AV_LOG_QUIET, "");
486 }
487
488 static volatile int received_sigterm = 0;
489 static volatile int received_nb_signals = 0;
490
491 static void
492 sigterm_handler(int sig)
493 {
494     received_sigterm = sig;
495     received_nb_signals++;
496     term_exit();
497 }
498
499 static void term_init(void)
500 {
501     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).  */
502     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
503 #ifdef SIGXCPU
504     signal(SIGXCPU, sigterm_handler);
505 #endif
506 }
507
508 static int decode_interrupt_cb(void *ctx)
509 {
510     return received_nb_signals > 1;
511 }
512
513 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
514
515 void exit_program(int ret)
516 {
517     int i;
518
519     /* close files */
520     for(i=0;i<nb_output_files;i++) {
521         AVFormatContext *s = output_files[i].ctx;
522         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
523             avio_close(s->pb);
524         avformat_free_context(s);
525         av_dict_free(&output_files[i].opts);
526     }
527     for(i=0;i<nb_input_files;i++) {
528         avformat_close_input(&input_files[i].ctx);
529     }
530     for (i = 0; i < nb_input_streams; i++) {
531         av_freep(&input_streams[i].decoded_frame);
532         av_freep(&input_streams[i].filtered_frame);
533         av_dict_free(&input_streams[i].opts);
534     }
535
536     if (vstats_file)
537         fclose(vstats_file);
538     av_free(vstats_filename);
539
540     av_freep(&input_streams);
541     av_freep(&input_files);
542     av_freep(&output_streams);
543     av_freep(&output_files);
544
545     uninit_opts();
546     av_free(audio_buf);
547     av_free(audio_out);
548     allocated_audio_buf_size= allocated_audio_out_size= 0;
549
550 #if CONFIG_AVFILTER
551     avfilter_uninit();
552 #endif
553     avformat_network_deinit();
554
555     if (received_sigterm) {
556         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
557                (int) received_sigterm);
558         exit (255);
559     }
560
561     exit(ret);
562 }
563
564 static void assert_avoptions(AVDictionary *m)
565 {
566     AVDictionaryEntry *t;
567     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
568         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
569         exit_program(1);
570     }
571 }
572
573 static void assert_codec_experimental(AVCodecContext *c, int encoder)
574 {
575     const char *codec_string = encoder ? "encoder" : "decoder";
576     AVCodec *codec;
577     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
578         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
579         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
580                 "results.\nAdd '-strict experimental' if you want to use it.\n",
581                 codec_string, c->codec->name);
582         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
583         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
584             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
585                    codec_string, codec->name);
586         exit_program(1);
587     }
588 }
589
590 static void choose_sample_fmt(AVStream *st, AVCodec *codec)
591 {
592     if(codec && codec->sample_fmts){
593         const enum AVSampleFormat *p= codec->sample_fmts;
594         for(; *p!=-1; p++){
595             if(*p == st->codec->sample_fmt)
596                 break;
597         }
598         if (*p == -1) {
599             av_log(NULL, AV_LOG_WARNING,
600                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
601                    av_get_sample_fmt_name(st->codec->sample_fmt),
602                    codec->name,
603                    av_get_sample_fmt_name(codec->sample_fmts[0]));
604             st->codec->sample_fmt = codec->sample_fmts[0];
605         }
606     }
607 }
608
609 /**
610  * Update the requested input sample format based on the output sample format.
611  * This is currently only used to request float output from decoders which
612  * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
613  * Ideally this will be removed in the future when decoders do not do format
614  * conversion and only output in their native format.
615  */
616 static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
617                               AVCodecContext *enc)
618 {
619     /* if sample formats match or a decoder sample format has already been
620        requested, just return */
621     if (enc->sample_fmt == dec->sample_fmt ||
622         dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
623         return;
624
625     /* if decoder supports more than one output format */
626     if (dec_codec && dec_codec->sample_fmts &&
627         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
628         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
629         const enum AVSampleFormat *p;
630         int min_dec = -1, min_inc = -1;
631
632         /* find a matching sample format in the encoder */
633         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
634             if (*p == enc->sample_fmt) {
635                 dec->request_sample_fmt = *p;
636                 return;
637             } else if (*p > enc->sample_fmt) {
638                 min_inc = FFMIN(min_inc, *p - enc->sample_fmt);
639             } else
640                 min_dec = FFMIN(min_dec, enc->sample_fmt - *p);
641         }
642
643         /* if none match, provide the one that matches quality closest */
644         dec->request_sample_fmt = min_inc > 0 ? enc->sample_fmt + min_inc :
645                                   enc->sample_fmt - min_dec;
646     }
647 }
648
649 static void choose_sample_rate(AVStream *st, AVCodec *codec)
650 {
651     if(codec && codec->supported_samplerates){
652         const int *p= codec->supported_samplerates;
653         int best=0;
654         int best_dist=INT_MAX;
655         for(; *p; p++){
656             int dist= abs(st->codec->sample_rate - *p);
657             if(dist < best_dist){
658                 best_dist= dist;
659                 best= *p;
660             }
661         }
662         if(best_dist){
663             av_log(st->codec, AV_LOG_WARNING, "Requested sampling rate unsupported using closest supported (%d)\n", best);
664         }
665         st->codec->sample_rate= best;
666     }
667 }
668
669 static void choose_pixel_fmt(AVStream *st, AVCodec *codec)
670 {
671     if(codec && codec->pix_fmts){
672         const enum PixelFormat *p= codec->pix_fmts;
673         if(st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL){
674             if(st->codec->codec_id==CODEC_ID_MJPEG){
675                 p= (const enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE};
676             }else if(st->codec->codec_id==CODEC_ID_LJPEG){
677                 p= (const enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE};
678             }
679         }
680         for (; *p != PIX_FMT_NONE; p++) {
681             if(*p == st->codec->pix_fmt)
682                 break;
683         }
684         if (*p == PIX_FMT_NONE) {
685             if(st->codec->pix_fmt != PIX_FMT_NONE)
686                 av_log(NULL, AV_LOG_WARNING,
687                         "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
688                         av_pix_fmt_descriptors[st->codec->pix_fmt].name,
689                         codec->name,
690                         av_pix_fmt_descriptors[codec->pix_fmts[0]].name);
691             st->codec->pix_fmt = codec->pix_fmts[0];
692         }
693     }
694 }
695
696 static double
697 get_sync_ipts(const OutputStream *ost)
698 {
699     const InputStream *ist = ost->sync_ist;
700     OutputFile *of = &output_files[ost->file_index];
701     return (double)(ist->pts - of->start_time)/AV_TIME_BASE;
702 }
703
704 static void write_frame(AVFormatContext *s, AVPacket *pkt, AVCodecContext *avctx, AVBitStreamFilterContext *bsfc){
705     int ret;
706
707     while(bsfc){
708         AVPacket new_pkt= *pkt;
709         int a= av_bitstream_filter_filter(bsfc, avctx, NULL,
710                                           &new_pkt.data, &new_pkt.size,
711                                           pkt->data, pkt->size,
712                                           pkt->flags & AV_PKT_FLAG_KEY);
713         if(a>0){
714             av_free_packet(pkt);
715             new_pkt.destruct= av_destruct_packet;
716         } else if(a<0){
717             av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
718                    bsfc->filter->name, pkt->stream_index,
719                    avctx->codec ? avctx->codec->name : "copy");
720             print_error("", a);
721             if (exit_on_error)
722                 exit_program(1);
723         }
724         *pkt= new_pkt;
725
726         bsfc= bsfc->next;
727     }
728
729     ret= av_interleaved_write_frame(s, pkt);
730     if(ret < 0){
731         print_error("av_interleaved_write_frame()", ret);
732         exit_program(1);
733     }
734 }
735
736 static void generate_silence(uint8_t* buf, enum AVSampleFormat sample_fmt, size_t size)
737 {
738     int fill_char = 0x00;
739     if (sample_fmt == AV_SAMPLE_FMT_U8)
740         fill_char = 0x80;
741     memset(buf, fill_char, size);
742 }
743
744 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
745                          InputStream *ist, AVFrame *decoded_frame)
746 {
747     uint8_t *buftmp;
748     int64_t audio_out_size, audio_buf_size;
749
750     int size_out, frame_bytes, ret, resample_changed;
751     AVCodecContext *enc= ost->st->codec;
752     AVCodecContext *dec= ist->st->codec;
753     int osize = av_get_bytes_per_sample(enc->sample_fmt);
754     int isize = av_get_bytes_per_sample(dec->sample_fmt);
755     const int coded_bps = av_get_bits_per_sample(enc->codec->id);
756     uint8_t *buf = decoded_frame->data[0];
757     int size     = decoded_frame->nb_samples * dec->channels * isize;
758     int64_t allocated_for_size = size;
759
760 need_realloc:
761     audio_buf_size= (allocated_for_size + isize*dec->channels - 1) / (isize*dec->channels);
762     audio_buf_size= (audio_buf_size*enc->sample_rate + dec->sample_rate) / dec->sample_rate;
763     audio_buf_size= audio_buf_size*2 + 10000; //safety factors for the deprecated resampling API
764     audio_buf_size= FFMAX(audio_buf_size, enc->frame_size);
765     audio_buf_size*= osize*enc->channels;
766
767     audio_out_size= FFMAX(audio_buf_size, enc->frame_size * osize * enc->channels);
768     if(coded_bps > 8*osize)
769         audio_out_size= audio_out_size * coded_bps / (8*osize);
770     audio_out_size += FF_MIN_BUFFER_SIZE;
771
772     if(audio_out_size > INT_MAX || audio_buf_size > INT_MAX){
773         av_log(NULL, AV_LOG_FATAL, "Buffer sizes too large\n");
774         exit_program(1);
775     }
776
777     av_fast_malloc(&audio_buf, &allocated_audio_buf_size, audio_buf_size);
778     av_fast_malloc(&audio_out, &allocated_audio_out_size, audio_out_size);
779     if (!audio_buf || !audio_out){
780         av_log(NULL, AV_LOG_FATAL, "Out of memory in do_audio_out\n");
781         exit_program(1);
782     }
783
784     if (enc->channels != dec->channels || enc->sample_rate != dec->sample_rate)
785         ost->audio_resample = 1;
786
787     resample_changed = ost->resample_sample_fmt  != dec->sample_fmt ||
788                        ost->resample_channels    != dec->channels   ||
789                        ost->resample_sample_rate != dec->sample_rate;
790
791     if ((ost->audio_resample && !ost->resample) || resample_changed) {
792         if (resample_changed) {
793             av_log(NULL, AV_LOG_INFO, "Input stream #%d:%d frame changed from rate:%d fmt:%s ch:%d to rate:%d fmt:%s ch:%d\n",
794                    ist->file_index, ist->st->index,
795                    ost->resample_sample_rate, av_get_sample_fmt_name(ost->resample_sample_fmt), ost->resample_channels,
796                    dec->sample_rate, av_get_sample_fmt_name(dec->sample_fmt), dec->channels);
797             ost->resample_sample_fmt  = dec->sample_fmt;
798             ost->resample_channels    = dec->channels;
799             ost->resample_sample_rate = dec->sample_rate;
800             if (ost->resample)
801                 audio_resample_close(ost->resample);
802         }
803         /* if audio_sync_method is >1 the resampler is needed for audio drift compensation */
804         if (audio_sync_method <= 1 &&
805             ost->resample_sample_fmt  == enc->sample_fmt &&
806             ost->resample_channels    == enc->channels   &&
807             ost->resample_sample_rate == enc->sample_rate) {
808             ost->resample = NULL;
809             ost->audio_resample = 0;
810         } else if (ost->audio_resample) {
811             if (dec->sample_fmt != AV_SAMPLE_FMT_S16)
812                 av_log(NULL, AV_LOG_WARNING, "Using s16 intermediate sample format for resampling\n");
813             ost->resample = av_audio_resample_init(enc->channels,    dec->channels,
814                                                    enc->sample_rate, dec->sample_rate,
815                                                    enc->sample_fmt,  dec->sample_fmt,
816                                                    16, 10, 0, 0.8);
817             if (!ost->resample) {
818                 av_log(NULL, AV_LOG_FATAL, "Can not resample %d channels @ %d Hz to %d channels @ %d Hz\n",
819                        dec->channels, dec->sample_rate,
820                        enc->channels, enc->sample_rate);
821                 exit_program(1);
822             }
823         }
824     }
825
826 #define MAKE_SFMT_PAIR(a,b) ((a)+AV_SAMPLE_FMT_NB*(b))
827     if (!ost->audio_resample && dec->sample_fmt!=enc->sample_fmt &&
828         MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt)!=ost->reformat_pair) {
829         if (ost->reformat_ctx)
830             av_audio_convert_free(ost->reformat_ctx);
831         ost->reformat_ctx = av_audio_convert_alloc(enc->sample_fmt, 1,
832                                                    dec->sample_fmt, 1, NULL, 0);
833         if (!ost->reformat_ctx) {
834             av_log(NULL, AV_LOG_FATAL, "Cannot convert %s sample format to %s sample format\n",
835                    av_get_sample_fmt_name(dec->sample_fmt),
836                    av_get_sample_fmt_name(enc->sample_fmt));
837             exit_program(1);
838         }
839         ost->reformat_pair=MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt);
840     }
841
842     if(audio_sync_method){
843         double delta = get_sync_ipts(ost) * enc->sample_rate - ost->sync_opts
844                 - av_fifo_size(ost->fifo)/(enc->channels * osize);
845         int idelta = delta * dec->sample_rate / enc->sample_rate;
846         int byte_delta = idelta * isize * dec->channels;
847
848         //FIXME resample delay
849         if(fabs(delta) > 50){
850             if(ist->is_start || fabs(delta) > audio_drift_threshold*enc->sample_rate){
851                 if(byte_delta < 0){
852                     byte_delta= FFMAX(byte_delta, -size);
853                     size += byte_delta;
854                     buf  -= byte_delta;
855                     av_log(NULL, AV_LOG_VERBOSE, "discarding %d audio samples\n",
856                            -byte_delta / (isize * dec->channels));
857                     if(!size)
858                         return;
859                     ist->is_start=0;
860                 }else{
861                     static uint8_t *input_tmp= NULL;
862                     input_tmp= av_realloc(input_tmp, byte_delta + size);
863
864                     if(byte_delta > allocated_for_size - size){
865                         allocated_for_size= byte_delta + (int64_t)size;
866                         goto need_realloc;
867                     }
868                     ist->is_start=0;
869
870                     generate_silence(input_tmp, dec->sample_fmt, byte_delta);
871                     memcpy(input_tmp + byte_delta, buf, size);
872                     buf= input_tmp;
873                     size += byte_delta;
874                     av_log(NULL, AV_LOG_VERBOSE, "adding %d audio samples of silence\n", idelta);
875                 }
876             }else if(audio_sync_method>1){
877                 int comp= av_clip(delta, -audio_sync_method, audio_sync_method);
878                 av_assert0(ost->audio_resample);
879                 av_log(NULL, AV_LOG_VERBOSE, "compensating audio timestamp drift:%f compensation:%d in:%d\n",
880                        delta, comp, enc->sample_rate);
881 //                fprintf(stderr, "drift:%f len:%d opts:%"PRId64" ipts:%"PRId64" fifo:%d\n", delta, -1, ost->sync_opts, (int64_t)(get_sync_ipts(ost) * enc->sample_rate), av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2));
882                 av_resample_compensate(*(struct AVResampleContext**)ost->resample, comp, enc->sample_rate);
883             }
884         }
885     }else
886         ost->sync_opts= lrintf(get_sync_ipts(ost) * enc->sample_rate)
887                         - av_fifo_size(ost->fifo)/(enc->channels * osize); //FIXME wrong
888
889     if (ost->audio_resample) {
890         buftmp = audio_buf;
891         size_out = audio_resample(ost->resample,
892                                   (short *)buftmp, (short *)buf,
893                                   size / (dec->channels * isize));
894         size_out = size_out * enc->channels * osize;
895     } else {
896         buftmp = buf;
897         size_out = size;
898     }
899
900     if (!ost->audio_resample && dec->sample_fmt!=enc->sample_fmt) {
901         const void *ibuf[6]= {buftmp};
902         void *obuf[6]= {audio_buf};
903         int istride[6]= {isize};
904         int ostride[6]= {osize};
905         int len= size_out/istride[0];
906         if (av_audio_convert(ost->reformat_ctx, obuf, ostride, ibuf, istride, len)<0) {
907             printf("av_audio_convert() failed\n");
908             if (exit_on_error)
909                 exit_program(1);
910             return;
911         }
912         buftmp = audio_buf;
913         size_out = len*osize;
914     }
915
916     /* now encode as many frames as possible */
917     if (enc->frame_size > 1) {
918         /* output resampled raw samples */
919         if (av_fifo_realloc2(ost->fifo, av_fifo_size(ost->fifo) + size_out) < 0) {
920             av_log(NULL, AV_LOG_FATAL, "av_fifo_realloc2() failed\n");
921             exit_program(1);
922         }
923         av_fifo_generic_write(ost->fifo, buftmp, size_out, NULL);
924
925         frame_bytes = enc->frame_size * osize * enc->channels;
926
927         while (av_fifo_size(ost->fifo) >= frame_bytes) {
928             AVPacket pkt;
929             av_init_packet(&pkt);
930
931             av_fifo_generic_read(ost->fifo, audio_buf, frame_bytes, NULL);
932
933             //FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()
934
935             ret = avcodec_encode_audio(enc, audio_out, audio_out_size,
936                                        (short *)audio_buf);
937             if (ret < 0) {
938                 av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
939                 exit_program(1);
940             }
941             audio_size += ret;
942             pkt.stream_index= ost->index;
943             pkt.data= audio_out;
944             pkt.size= ret;
945             if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
946                 pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
947             pkt.flags |= AV_PKT_FLAG_KEY;
948             write_frame(s, &pkt, enc, ost->bitstream_filters);
949
950             ost->sync_opts += enc->frame_size;
951         }
952     } else {
953         AVPacket pkt;
954         av_init_packet(&pkt);
955
956         ost->sync_opts += size_out / (osize * enc->channels);
957
958         /* output a pcm frame */
959         /* determine the size of the coded buffer */
960         size_out /= osize;
961         if (coded_bps)
962             size_out = size_out*coded_bps/8;
963
964         if(size_out > audio_out_size){
965             av_log(NULL, AV_LOG_FATAL, "Internal error, buffer size too small\n");
966             exit_program(1);
967         }
968
969         //FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()
970         ret = avcodec_encode_audio(enc, audio_out, size_out,
971                                    (short *)buftmp);
972         if (ret < 0) {
973             av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
974             exit_program(1);
975         }
976         audio_size += ret;
977         pkt.stream_index= ost->index;
978         pkt.data= audio_out;
979         pkt.size= ret;
980         if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
981             pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
982         pkt.flags |= AV_PKT_FLAG_KEY;
983         write_frame(s, &pkt, enc, ost->bitstream_filters);
984     }
985 }
986
987 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
988 {
989     AVCodecContext *dec;
990     AVPicture *picture2;
991     AVPicture picture_tmp;
992     uint8_t *buf = 0;
993
994     dec = ist->st->codec;
995
996     /* deinterlace : must be done before any resize */
997     if (do_deinterlace) {
998         int size;
999
1000         /* create temporary picture */
1001         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1002         buf = av_malloc(size);
1003         if (!buf)
1004             return;
1005
1006         picture2 = &picture_tmp;
1007         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1008
1009         if(avpicture_deinterlace(picture2, picture,
1010                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1011             /* if error, do not deinterlace */
1012             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1013             av_free(buf);
1014             buf = NULL;
1015             picture2 = picture;
1016         }
1017     } else {
1018         picture2 = picture;
1019     }
1020
1021     if (picture != picture2)
1022         *picture = *picture2;
1023     *bufp = buf;
1024 }
1025
1026 static void do_subtitle_out(AVFormatContext *s,
1027                             OutputStream *ost,
1028                             InputStream *ist,
1029                             AVSubtitle *sub,
1030                             int64_t pts)
1031 {
1032     static uint8_t *subtitle_out = NULL;
1033     int subtitle_out_max_size = 1024 * 1024;
1034     int subtitle_out_size, nb, i;
1035     AVCodecContext *enc;
1036     AVPacket pkt;
1037
1038     if (pts == AV_NOPTS_VALUE) {
1039         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1040         if (exit_on_error)
1041             exit_program(1);
1042         return;
1043     }
1044
1045     enc = ost->st->codec;
1046
1047     if (!subtitle_out) {
1048         subtitle_out = av_malloc(subtitle_out_max_size);
1049     }
1050
1051     /* Note: DVB subtitle need one packet to draw them and one other
1052        packet to clear them */
1053     /* XXX: signal it in the codec context ? */
1054     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1055         nb = 2;
1056     else
1057         nb = 1;
1058
1059     for(i = 0; i < nb; i++) {
1060         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1061         // start_display_time is required to be 0
1062         sub->pts              += av_rescale_q(sub->start_display_time, (AVRational){1, 1000}, AV_TIME_BASE_Q);
1063         sub->end_display_time -= sub->start_display_time;
1064         sub->start_display_time = 0;
1065         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1066                                                     subtitle_out_max_size, sub);
1067         if (subtitle_out_size < 0) {
1068             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1069             exit_program(1);
1070         }
1071
1072         av_init_packet(&pkt);
1073         pkt.stream_index = ost->index;
1074         pkt.data = subtitle_out;
1075         pkt.size = subtitle_out_size;
1076         pkt.pts = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1077         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1078             /* XXX: the pts correction is handled here. Maybe handling
1079                it in the codec would be better */
1080             if (i == 0)
1081                 pkt.pts += 90 * sub->start_display_time;
1082             else
1083                 pkt.pts += 90 * sub->end_display_time;
1084         }
1085         write_frame(s, &pkt, ost->st->codec, ost->bitstream_filters);
1086     }
1087 }
1088
1089 static int bit_buffer_size= 1024*256;
1090 static uint8_t *bit_buffer= NULL;
1091
1092 static void do_video_resample(OutputStream *ost,
1093                               InputStream *ist,
1094                               AVFrame *in_picture,
1095                               AVFrame **out_picture)
1096 {
1097     int resample_changed = 0;
1098     AVCodecContext *dec = ist->st->codec;
1099     *out_picture = in_picture;
1100
1101     resample_changed = ost->resample_width   != dec->width  ||
1102                        ost->resample_height  != dec->height ||
1103                        ost->resample_pix_fmt != dec->pix_fmt;
1104
1105     if (resample_changed) {
1106         av_log(NULL, AV_LOG_INFO,
1107                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1108                ist->file_index, ist->st->index,
1109                ost->resample_width, ost->resample_height, av_get_pix_fmt_name(ost->resample_pix_fmt),
1110                dec->width         , dec->height         , av_get_pix_fmt_name(dec->pix_fmt));
1111         if(!ost->video_resample)
1112             ost->video_resample = 1;
1113     }
1114
1115 #if !CONFIG_AVFILTER
1116     if (ost->video_resample) {
1117         *out_picture = &ost->pict_tmp;
1118         if (resample_changed) {
1119             /* initialize a new scaler context */
1120             sws_freeContext(ost->img_resample_ctx);
1121             ost->img_resample_ctx = sws_getContext(
1122                 ist->st->codec->width,
1123                 ist->st->codec->height,
1124                 ist->st->codec->pix_fmt,
1125                 ost->st->codec->width,
1126                 ost->st->codec->height,
1127                 ost->st->codec->pix_fmt,
1128                 ost->sws_flags, NULL, NULL, NULL);
1129             if (ost->img_resample_ctx == NULL) {
1130                 av_log(NULL, AV_LOG_FATAL, "Cannot get resampling context\n");
1131                 exit_program(1);
1132             }
1133         }
1134         sws_scale(ost->img_resample_ctx, in_picture->data, in_picture->linesize,
1135               0, ost->resample_height, (*out_picture)->data, (*out_picture)->linesize);
1136     }
1137 #else
1138     if (resample_changed) {
1139         avfilter_graph_free(&ost->graph);
1140         if (configure_video_filters(ist, ost)) {
1141             av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1142             exit_program(1);
1143         }
1144     }
1145 #endif
1146     if (resample_changed) {
1147         ost->resample_width   = dec->width;
1148         ost->resample_height  = dec->height;
1149         ost->resample_pix_fmt = dec->pix_fmt;
1150     }
1151 }
1152
1153
1154 static void do_video_out(AVFormatContext *s,
1155                          OutputStream *ost,
1156                          InputStream *ist,
1157                          AVFrame *in_picture,
1158                          int *frame_size, float quality)
1159 {
1160     int nb_frames, i, ret, format_video_sync;
1161     AVFrame *final_picture;
1162     AVCodecContext *enc;
1163     double sync_ipts;
1164
1165     enc = ost->st->codec;
1166
1167     sync_ipts = get_sync_ipts(ost) / av_q2d(enc->time_base);
1168
1169     /* by default, we output a single frame */
1170     nb_frames = 1;
1171
1172     *frame_size = 0;
1173
1174     format_video_sync = video_sync_method;
1175     if (format_video_sync < 0)
1176         format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? 0 :
1177                             (s->oformat->flags & AVFMT_VARIABLE_FPS) ? 2 : 1;
1178
1179     if (format_video_sync) {
1180         double vdelta = sync_ipts - ost->sync_opts;
1181         //FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
1182         if (vdelta < -1.1)
1183             nb_frames = 0;
1184         else if (format_video_sync == 2) {
1185             if(vdelta<=-0.6){
1186                 nb_frames=0;
1187             }else if(vdelta>0.6)
1188                 ost->sync_opts= lrintf(sync_ipts);
1189         }else if (vdelta > 1.1)
1190             nb_frames = lrintf(vdelta);
1191 //fprintf(stderr, "vdelta:%f, ost->sync_opts:%"PRId64", ost->sync_ipts:%f nb_frames:%d\n", vdelta, ost->sync_opts, get_sync_ipts(ost), nb_frames);
1192         if (nb_frames == 0){
1193             ++nb_frames_drop;
1194             av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1195         }else if (nb_frames > 1) {
1196             nb_frames_dup += nb_frames - 1;
1197             av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames-1);
1198         }
1199     }else
1200         ost->sync_opts= lrintf(sync_ipts);
1201
1202     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
1203     if (nb_frames <= 0)
1204         return;
1205
1206     do_video_resample(ost, ist, in_picture, &final_picture);
1207
1208     /* duplicates frame if needed */
1209     for(i=0;i<nb_frames;i++) {
1210         AVPacket pkt;
1211         av_init_packet(&pkt);
1212         pkt.stream_index= ost->index;
1213
1214         if (s->oformat->flags & AVFMT_RAWPICTURE &&
1215             enc->codec->id == CODEC_ID_RAWVIDEO) {
1216             /* raw pictures are written as AVPicture structure to
1217                avoid any copies. We support temporarily the older
1218                method. */
1219             enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1220             enc->coded_frame->top_field_first  = in_picture->top_field_first;
1221             pkt.data= (uint8_t *)final_picture;
1222             pkt.size=  sizeof(AVPicture);
1223             pkt.pts= av_rescale_q(ost->sync_opts, enc->time_base, ost->st->time_base);
1224             pkt.flags |= AV_PKT_FLAG_KEY;
1225
1226             write_frame(s, &pkt, ost->st->codec, ost->bitstream_filters);
1227         } else {
1228             AVFrame big_picture;
1229
1230             big_picture= *final_picture;
1231             /* better than nothing: use input picture interlaced
1232                settings */
1233             big_picture.interlaced_frame = in_picture->interlaced_frame;
1234             if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1235                 if (ost->top_field_first == -1)
1236                     big_picture.top_field_first = in_picture->top_field_first;
1237                 else
1238                     big_picture.top_field_first = !!ost->top_field_first;
1239             }
1240
1241             /* handles same_quant here. This is not correct because it may
1242                not be a global option */
1243             big_picture.quality = quality;
1244             if (!enc->me_threshold)
1245                 big_picture.pict_type = 0;
1246 //            big_picture.pts = AV_NOPTS_VALUE;
1247             big_picture.pts= ost->sync_opts;
1248 //            big_picture.pts= av_rescale(ost->sync_opts, AV_TIME_BASE*(int64_t)enc->time_base.num, enc->time_base.den);
1249 //av_log(NULL, AV_LOG_DEBUG, "%"PRId64" -> encoder\n", ost->sync_opts);
1250             if (ost->forced_kf_index < ost->forced_kf_count &&
1251                 big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1252                 big_picture.pict_type = AV_PICTURE_TYPE_I;
1253                 ost->forced_kf_index++;
1254             }
1255             ret = avcodec_encode_video(enc,
1256                                        bit_buffer, bit_buffer_size,
1257                                        &big_picture);
1258             if (ret < 0) {
1259                 av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1260                 exit_program(1);
1261             }
1262
1263             if(ret>0){
1264                 pkt.data= bit_buffer;
1265                 pkt.size= ret;
1266                 if(enc->coded_frame->pts != AV_NOPTS_VALUE)
1267                     pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
1268 /*av_log(NULL, AV_LOG_DEBUG, "encoder -> %"PRId64"/%"PRId64"\n",
1269    pkt.pts != AV_NOPTS_VALUE ? av_rescale(pkt.pts, enc->time_base.den, AV_TIME_BASE*(int64_t)enc->time_base.num) : -1,
1270    pkt.dts != AV_NOPTS_VALUE ? av_rescale(pkt.dts, enc->time_base.den, AV_TIME_BASE*(int64_t)enc->time_base.num) : -1);*/
1271
1272                 if(enc->coded_frame->key_frame)
1273                     pkt.flags |= AV_PKT_FLAG_KEY;
1274                 write_frame(s, &pkt, ost->st->codec, ost->bitstream_filters);
1275                 *frame_size = ret;
1276                 video_size += ret;
1277                 //fprintf(stderr,"\nFrame: %3d size: %5d type: %d",
1278                 //        enc->frame_number-1, ret, enc->pict_type);
1279                 /* if two pass, output log */
1280                 if (ost->logfile && enc->stats_out) {
1281                     fprintf(ost->logfile, "%s", enc->stats_out);
1282                 }
1283             }
1284         }
1285         ost->sync_opts++;
1286         ost->frame_number++;
1287     }
1288 }
1289
1290 static double psnr(double d){
1291     return -10.0*log(d)/log(10.0);
1292 }
1293
1294 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1295                            int frame_size)
1296 {
1297     AVCodecContext *enc;
1298     int frame_number;
1299     double ti1, bitrate, avg_bitrate;
1300
1301     /* this is executed just the first time do_video_stats is called */
1302     if (!vstats_file) {
1303         vstats_file = fopen(vstats_filename, "w");
1304         if (!vstats_file) {
1305             perror("fopen");
1306             exit_program(1);
1307         }
1308     }
1309
1310     enc = ost->st->codec;
1311     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1312         frame_number = ost->frame_number;
1313         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality/(float)FF_QP2LAMBDA);
1314         if (enc->flags&CODEC_FLAG_PSNR)
1315             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0]/(enc->width*enc->height*255.0*255.0)));
1316
1317         fprintf(vstats_file,"f_size= %6d ", frame_size);
1318         /* compute pts value */
1319         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1320         if (ti1 < 0.01)
1321             ti1 = 0.01;
1322
1323         bitrate = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1324         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1325         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1326             (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1327         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1328     }
1329 }
1330
1331 static void print_report(OutputFile *output_files,
1332                          OutputStream *ost_table, int nb_ostreams,
1333                          int is_last_report, int64_t timer_start)
1334 {
1335     char buf[1024];
1336     OutputStream *ost;
1337     AVFormatContext *oc;
1338     int64_t total_size;
1339     AVCodecContext *enc;
1340     int frame_number, vid, i;
1341     double bitrate, ti1, pts;
1342     static int64_t last_time = -1;
1343     static int qp_histogram[52];
1344
1345     if (!print_stats && !is_last_report)
1346         return;
1347
1348     if (!is_last_report) {
1349         int64_t cur_time;
1350         /* display the report every 0.5 seconds */
1351         cur_time = av_gettime();
1352         if (last_time == -1) {
1353             last_time = cur_time;
1354             return;
1355         }
1356         if ((cur_time - last_time) < 500000)
1357             return;
1358         last_time = cur_time;
1359     }
1360
1361
1362     oc = output_files[0].ctx;
1363
1364     total_size = avio_size(oc->pb);
1365     if(total_size<0) // FIXME improve avio_size() so it works with non seekable output too
1366         total_size= avio_tell(oc->pb);
1367
1368     buf[0] = '\0';
1369     ti1 = 1e10;
1370     vid = 0;
1371     for(i=0;i<nb_ostreams;i++) {
1372         float q = -1;
1373         ost = &ost_table[i];
1374         enc = ost->st->codec;
1375         if (!ost->stream_copy && enc->coded_frame)
1376             q = enc->coded_frame->quality/(float)FF_QP2LAMBDA;
1377         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1378             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1379         }
1380         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1381             float t = (av_gettime()-timer_start) / 1000000.0;
1382
1383             frame_number = ost->frame_number;
1384             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
1385                      frame_number, (t>1)?(int)(frame_number/t+0.5) : 0, q);
1386             if(is_last_report)
1387                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1388             if(qp_hist){
1389                 int j;
1390                 int qp = lrintf(q);
1391                 if(qp>=0 && qp<FF_ARRAY_ELEMS(qp_histogram))
1392                     qp_histogram[qp]++;
1393                 for(j=0; j<32; j++)
1394                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j]+1)/log(2)));
1395             }
1396             if (enc->flags&CODEC_FLAG_PSNR){
1397                 int j;
1398                 double error, error_sum=0;
1399                 double scale, scale_sum=0;
1400                 char type[3]= {'Y','U','V'};
1401                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1402                 for(j=0; j<3; j++){
1403                     if(is_last_report){
1404                         error= enc->error[j];
1405                         scale= enc->width*enc->height*255.0*255.0*frame_number;
1406                     }else{
1407                         error= enc->coded_frame->error[j];
1408                         scale= enc->width*enc->height*255.0*255.0;
1409                     }
1410                     if(j) scale/=4;
1411                     error_sum += error;
1412                     scale_sum += scale;
1413                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error/scale));
1414                 }
1415                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum/scale_sum));
1416             }
1417             vid = 1;
1418         }
1419         /* compute min output value */
1420         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
1421         if ((pts < ti1) && (pts > 0))
1422             ti1 = pts;
1423     }
1424     if (ti1 < 0.01)
1425         ti1 = 0.01;
1426
1427     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
1428
1429     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1430             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
1431             (double)total_size / 1024, ti1, bitrate);
1432
1433     if (nb_frames_dup || nb_frames_drop)
1434         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1435                 nb_frames_dup, nb_frames_drop);
1436
1437     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1438
1439     fflush(stderr);
1440
1441     if (is_last_report) {
1442         int64_t raw= audio_size + video_size + extra_size;
1443         av_log(NULL, AV_LOG_INFO, "\n");
1444         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
1445                video_size/1024.0,
1446                audio_size/1024.0,
1447                extra_size/1024.0,
1448                100.0*(total_size - raw)/raw
1449         );
1450     }
1451 }
1452
1453 static void flush_encoders(OutputStream *ost_table, int nb_ostreams)
1454 {
1455     int i, ret;
1456
1457     for (i = 0; i < nb_ostreams; i++) {
1458         OutputStream   *ost = &ost_table[i];
1459         AVCodecContext *enc = ost->st->codec;
1460         AVFormatContext *os = output_files[ost->file_index].ctx;
1461
1462         if (!ost->encoding_needed)
1463             continue;
1464
1465         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <=1)
1466             continue;
1467         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
1468             continue;
1469
1470         for(;;) {
1471             AVPacket pkt;
1472             int fifo_bytes;
1473             av_init_packet(&pkt);
1474             pkt.stream_index= ost->index;
1475
1476             switch (ost->st->codec->codec_type) {
1477             case AVMEDIA_TYPE_AUDIO:
1478                 fifo_bytes = av_fifo_size(ost->fifo);
1479                 ret = 0;
1480                 /* encode any samples remaining in fifo */
1481                 if (fifo_bytes > 0) {
1482                     int osize = av_get_bytes_per_sample(enc->sample_fmt);
1483                     int fs_tmp = enc->frame_size;
1484
1485                     av_fifo_generic_read(ost->fifo, audio_buf, fifo_bytes, NULL);
1486                     if (enc->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
1487                         enc->frame_size = fifo_bytes / (osize * enc->channels);
1488                     } else { /* pad */
1489                         int frame_bytes = enc->frame_size*osize*enc->channels;
1490                         if (allocated_audio_buf_size < frame_bytes)
1491                             exit_program(1);
1492                         generate_silence(audio_buf+fifo_bytes, enc->sample_fmt, frame_bytes - fifo_bytes);
1493                     }
1494
1495                     ret = avcodec_encode_audio(enc, bit_buffer, bit_buffer_size, (short *)audio_buf);
1496                     pkt.duration = av_rescale((int64_t)enc->frame_size*ost->st->time_base.den,
1497                                               ost->st->time_base.num, enc->sample_rate);
1498                     enc->frame_size = fs_tmp;
1499                 }
1500                 if (ret <= 0) {
1501                     ret = avcodec_encode_audio(enc, bit_buffer, bit_buffer_size, NULL);
1502                 }
1503                 if (ret < 0) {
1504                     av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
1505                     exit_program(1);
1506                 }
1507                 audio_size += ret;
1508                 pkt.flags |= AV_PKT_FLAG_KEY;
1509                 break;
1510             case AVMEDIA_TYPE_VIDEO:
1511                 ret = avcodec_encode_video(enc, bit_buffer, bit_buffer_size, NULL);
1512                 if (ret < 0) {
1513                     av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1514                     exit_program(1);
1515                 }
1516                 video_size += ret;
1517                 if(enc->coded_frame && enc->coded_frame->key_frame)
1518                     pkt.flags |= AV_PKT_FLAG_KEY;
1519                 if (ost->logfile && enc->stats_out) {
1520                     fprintf(ost->logfile, "%s", enc->stats_out);
1521                 }
1522                 break;
1523             default:
1524                 ret=-1;
1525             }
1526
1527             if (ret <= 0)
1528                 break;
1529             pkt.data = bit_buffer;
1530             pkt.size = ret;
1531             if (enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
1532                 pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
1533             write_frame(os, &pkt, ost->st->codec, ost->bitstream_filters);
1534         }
1535     }
1536 }
1537
1538 /*
1539  * Check whether a packet from ist should be written into ost at this time
1540  */
1541 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1542 {
1543     OutputFile *of = &output_files[ost->file_index];
1544     int ist_index  = ist - input_streams;
1545
1546     if (ost->source_index != ist_index)
1547         return 0;
1548
1549     if (of->start_time && ist->pts < of->start_time)
1550         return 0;
1551
1552     if (of->recording_time != INT64_MAX &&
1553         av_compare_ts(ist->pts, AV_TIME_BASE_Q, of->recording_time + of->start_time,
1554                       (AVRational){1, 1000000}) >= 0) {
1555         ost->is_past_recording_time = 1;
1556         return 0;
1557     }
1558
1559     return 1;
1560 }
1561
1562 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1563 {
1564     OutputFile *of = &output_files[ost->file_index];
1565     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
1566     AVPacket opkt;
1567
1568     av_init_packet(&opkt);
1569
1570     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1571         !ost->copy_initial_nonkeyframes)
1572         return;
1573
1574     /* force the input stream PTS */
1575     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1576         audio_size += pkt->size;
1577     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1578         video_size += pkt->size;
1579         ost->sync_opts++;
1580     }
1581
1582     opkt.stream_index = ost->index;
1583     if (pkt->pts != AV_NOPTS_VALUE)
1584         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1585     else
1586         opkt.pts = AV_NOPTS_VALUE;
1587
1588     if (pkt->dts == AV_NOPTS_VALUE)
1589         opkt.dts = av_rescale_q(ist->pts, AV_TIME_BASE_Q, ost->st->time_base);
1590     else
1591         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1592     opkt.dts -= ost_tb_start_time;
1593
1594     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1595     opkt.flags    = pkt->flags;
1596
1597     //FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1598     if(   ost->st->codec->codec_id != CODEC_ID_H264
1599        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
1600        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
1601        ) {
1602         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1603             opkt.destruct = av_destruct_packet;
1604     } else {
1605         opkt.data = pkt->data;
1606         opkt.size = pkt->size;
1607     }
1608
1609     write_frame(of->ctx, &opkt, ost->st->codec, ost->bitstream_filters);
1610     ost->st->codec->frame_number++;
1611     ost->frame_number++;
1612     av_free_packet(&opkt);
1613 }
1614
1615 static void rate_emu_sleep(InputStream *ist)
1616 {
1617     if (input_files[ist->file_index].rate_emu) {
1618         int64_t pts = av_rescale(ist->pts, 1000000, AV_TIME_BASE);
1619         int64_t now = av_gettime() - ist->start;
1620         if (pts > now)
1621             usleep(pts - now);
1622     }
1623 }
1624
1625 static int transcode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1626 {
1627     AVFrame *decoded_frame;
1628     AVCodecContext *avctx = ist->st->codec;
1629     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
1630     int i, ret;
1631
1632     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1633         return AVERROR(ENOMEM);
1634     else
1635         avcodec_get_frame_defaults(ist->decoded_frame);
1636     decoded_frame = ist->decoded_frame;
1637
1638     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1639     if (ret < 0) {
1640         return ret;
1641     }
1642
1643     if (!*got_output) {
1644         /* no audio frame */
1645         return ret;
1646     }
1647
1648     /* if the decoder provides a pts, use it instead of the last packet pts.
1649        the decoder could be delaying output by a packet or more. */
1650     if (decoded_frame->pts != AV_NOPTS_VALUE)
1651         ist->next_pts = decoded_frame->pts;
1652
1653     /* increment next_pts to use for the case where the input stream does not
1654        have timestamps or there are multiple frames in the packet */
1655     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1656                      avctx->sample_rate;
1657
1658     // preprocess audio (volume)
1659     if (audio_volume != 256) {
1660         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
1661         void *samples = decoded_frame->data[0];
1662         switch (avctx->sample_fmt) {
1663         case AV_SAMPLE_FMT_U8:
1664         {
1665             uint8_t *volp = samples;
1666             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1667                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
1668                 *volp++ = av_clip_uint8(v);
1669             }
1670             break;
1671         }
1672         case AV_SAMPLE_FMT_S16:
1673         {
1674             int16_t *volp = samples;
1675             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1676                 int v = ((*volp) * audio_volume + 128) >> 8;
1677                 *volp++ = av_clip_int16(v);
1678             }
1679             break;
1680         }
1681         case AV_SAMPLE_FMT_S32:
1682         {
1683             int32_t *volp = samples;
1684             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1685                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
1686                 *volp++ = av_clipl_int32(v);
1687             }
1688             break;
1689         }
1690         case AV_SAMPLE_FMT_FLT:
1691         {
1692             float *volp = samples;
1693             float scale = audio_volume / 256.f;
1694             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1695                 *volp++ *= scale;
1696             }
1697             break;
1698         }
1699         case AV_SAMPLE_FMT_DBL:
1700         {
1701             double *volp = samples;
1702             double scale = audio_volume / 256.;
1703             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1704                 *volp++ *= scale;
1705             }
1706             break;
1707         }
1708         default:
1709             av_log(NULL, AV_LOG_FATAL,
1710                    "Audio volume adjustment on sample format %s is not supported.\n",
1711                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
1712             exit_program(1);
1713         }
1714     }
1715
1716     rate_emu_sleep(ist);
1717
1718     for (i = 0; i < nb_output_streams; i++) {
1719         OutputStream *ost = &output_streams[i];
1720
1721         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1722             continue;
1723         do_audio_out(output_files[ost->file_index].ctx, ost, ist, decoded_frame);
1724     }
1725
1726     return ret;
1727 }
1728
1729 static int transcode_video(InputStream *ist, AVPacket *pkt, int *got_output, int64_t *pkt_pts)
1730 {
1731     AVFrame *decoded_frame, *filtered_frame = NULL;
1732     void *buffer_to_free = NULL;
1733     int i, ret = 0;
1734     float quality;
1735 #if CONFIG_AVFILTER
1736     int frame_available = 1;
1737 #endif
1738
1739     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1740         return AVERROR(ENOMEM);
1741     else
1742         avcodec_get_frame_defaults(ist->decoded_frame);
1743     decoded_frame = ist->decoded_frame;
1744     pkt->pts  = *pkt_pts;
1745     pkt->dts  = ist->pts;
1746     *pkt_pts  = AV_NOPTS_VALUE;
1747
1748     ret = avcodec_decode_video2(ist->st->codec,
1749                                 decoded_frame, got_output, pkt);
1750     if (ret < 0)
1751         return ret;
1752
1753     quality = same_quant ? decoded_frame->quality : 0;
1754     if (!*got_output) {
1755         /* no picture yet */
1756         return ret;
1757     }
1758     ist->next_pts = ist->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
1759                                                  decoded_frame->pkt_dts);
1760     if (pkt->duration)
1761         ist->next_pts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
1762     else if (ist->st->codec->time_base.num != 0) {
1763         int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
1764                                            ist->st->codec->ticks_per_frame;
1765         ist->next_pts += ((int64_t)AV_TIME_BASE *
1766                           ist->st->codec->time_base.num * ticks) /
1767                           ist->st->codec->time_base.den;
1768     }
1769     pkt->size = 0;
1770     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
1771
1772     rate_emu_sleep(ist);
1773
1774     for (i = 0; i < nb_output_streams; i++) {
1775         OutputStream *ost = &output_streams[i];
1776         int frame_size;
1777
1778         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1779             continue;
1780
1781 #if CONFIG_AVFILTER
1782         if (ost->input_video_filter) {
1783             AVRational sar;
1784             if (ist->st->sample_aspect_ratio.num)
1785                 sar = ist->st->sample_aspect_ratio;
1786             else
1787                 sar = ist->st->codec->sample_aspect_ratio;
1788             av_vsrc_buffer_add_frame(ost->input_video_filter, decoded_frame, ist->pts, sar);
1789             if (!ist->filtered_frame && !(ist->filtered_frame = avcodec_alloc_frame())) {
1790                 av_free(buffer_to_free);
1791                 return AVERROR(ENOMEM);
1792             } else
1793                 avcodec_get_frame_defaults(ist->filtered_frame);
1794             filtered_frame = ist->filtered_frame;
1795             frame_available = avfilter_poll_frame(ost->output_video_filter->inputs[0]);
1796         }
1797         while (frame_available) {
1798             AVRational ist_pts_tb;
1799             if (ost->output_video_filter)
1800                 get_filtered_video_frame(ost->output_video_filter, filtered_frame, &ost->picref, &ist_pts_tb);
1801             if (ost->picref)
1802                 ist->pts = av_rescale_q(ost->picref->pts, ist_pts_tb, AV_TIME_BASE_Q);
1803             if (ost->picref->video && !ost->frame_aspect_ratio)
1804                 ost->st->codec->sample_aspect_ratio = ost->picref->video->pixel_aspect;
1805 #else
1806             filtered_frame = decoded_frame;
1807 #endif
1808
1809             do_video_out(output_files[ost->file_index].ctx, ost, ist, filtered_frame, &frame_size,
1810                          same_quant ? quality : ost->st->codec->global_quality);
1811             if (vstats_filename && frame_size)
1812                 do_video_stats(output_files[ost->file_index].ctx, ost, frame_size);
1813 #if CONFIG_AVFILTER
1814             frame_available = ost->output_video_filter && avfilter_poll_frame(ost->output_video_filter->inputs[0]);
1815             if (ost->picref)
1816                 avfilter_unref_buffer(ost->picref);
1817         }
1818 #endif
1819     }
1820
1821     av_free(buffer_to_free);
1822     return ret;
1823 }
1824
1825 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1826 {
1827     AVSubtitle subtitle;
1828     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1829                                           &subtitle, got_output, pkt);
1830     if (ret < 0)
1831         return ret;
1832     if (!*got_output)
1833         return ret;
1834
1835     rate_emu_sleep(ist);
1836
1837     for (i = 0; i < nb_output_streams; i++) {
1838         OutputStream *ost = &output_streams[i];
1839
1840         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1841             continue;
1842
1843         do_subtitle_out(output_files[ost->file_index].ctx, ost, ist, &subtitle, pkt->pts);
1844     }
1845
1846     avsubtitle_free(&subtitle);
1847     return ret;
1848 }
1849
1850 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1851 static int output_packet(InputStream *ist,
1852                          OutputStream *ost_table, int nb_ostreams,
1853                          const AVPacket *pkt)
1854 {
1855     int i;
1856     int got_output;
1857     int64_t pkt_pts = AV_NOPTS_VALUE;
1858     AVPacket avpkt;
1859
1860     if (ist->next_pts == AV_NOPTS_VALUE)
1861         ist->next_pts = ist->pts;
1862
1863     if (pkt == NULL) {
1864         /* EOF handling */
1865         av_init_packet(&avpkt);
1866         avpkt.data = NULL;
1867         avpkt.size = 0;
1868         goto handle_eof;
1869     } else {
1870         avpkt = *pkt;
1871     }
1872
1873     if(pkt->dts != AV_NOPTS_VALUE)
1874         ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1875     if(pkt->pts != AV_NOPTS_VALUE)
1876         pkt_pts = av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
1877
1878     //while we have more to decode or while the decoder did output something on EOF
1879     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1880         int ret = 0;
1881     handle_eof:
1882
1883         ist->pts = ist->next_pts;
1884
1885         if (avpkt.size && avpkt.size != pkt->size) {
1886             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1887                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1888             ist->showed_multi_packet_warning = 1;
1889         }
1890
1891         switch(ist->st->codec->codec_type) {
1892         case AVMEDIA_TYPE_AUDIO:
1893             ret = transcode_audio    (ist, &avpkt, &got_output);
1894             break;
1895         case AVMEDIA_TYPE_VIDEO:
1896             ret = transcode_video    (ist, &avpkt, &got_output, &pkt_pts);
1897             break;
1898         case AVMEDIA_TYPE_SUBTITLE:
1899             ret = transcode_subtitles(ist, &avpkt, &got_output);
1900             break;
1901         default:
1902             return -1;
1903         }
1904
1905         if (ret < 0)
1906             return ret;
1907         // touch data and size only if not EOF
1908         if (pkt) {
1909             avpkt.data += ret;
1910             avpkt.size -= ret;
1911         }
1912         if (!got_output) {
1913             continue;
1914         }
1915     }
1916
1917     /* handle stream copy */
1918     if (!ist->decoding_needed) {
1919         rate_emu_sleep(ist);
1920         ist->pts = ist->next_pts;
1921         switch (ist->st->codec->codec_type) {
1922         case AVMEDIA_TYPE_AUDIO:
1923             ist->next_pts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1924                              ist->st->codec->sample_rate;
1925             break;
1926         case AVMEDIA_TYPE_VIDEO:
1927             if (ist->st->codec->time_base.num != 0) {
1928                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
1929                 ist->next_pts += ((int64_t)AV_TIME_BASE *
1930                                   ist->st->codec->time_base.num * ticks) /
1931                                   ist->st->codec->time_base.den;
1932             }
1933             break;
1934         }
1935     }
1936     for (i = 0; pkt && i < nb_ostreams; i++) {
1937         OutputStream *ost = &ost_table[i];
1938
1939         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1940             continue;
1941
1942         do_streamcopy(ist, ost, pkt);
1943     }
1944
1945     return 0;
1946 }
1947
1948 static void print_sdp(OutputFile *output_files, int n)
1949 {
1950     char sdp[2048];
1951     int i;
1952     AVFormatContext **avc = av_malloc(sizeof(*avc)*n);
1953
1954     if (!avc)
1955         exit_program(1);
1956     for (i = 0; i < n; i++)
1957         avc[i] = output_files[i].ctx;
1958
1959     av_sdp_create(avc, n, sdp, sizeof(sdp));
1960     printf("SDP:\n%s\n", sdp);
1961     fflush(stdout);
1962     av_freep(&avc);
1963 }
1964
1965 static int init_input_stream(int ist_index, OutputStream *output_streams, int nb_output_streams,
1966                              char *error, int error_len)
1967 {
1968     int i;
1969     InputStream *ist = &input_streams[ist_index];
1970     if (ist->decoding_needed) {
1971         AVCodec *codec = ist->dec;
1972         if (!codec) {
1973             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
1974                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
1975             return AVERROR(EINVAL);
1976         }
1977
1978         /* update requested sample format for the decoder based on the
1979            corresponding encoder sample format */
1980         for (i = 0; i < nb_output_streams; i++) {
1981             OutputStream *ost = &output_streams[i];
1982             if (ost->source_index == ist_index) {
1983                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
1984                 break;
1985             }
1986         }
1987
1988         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
1989             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
1990                     ist->file_index, ist->st->index);
1991             return AVERROR(EINVAL);
1992         }
1993         assert_codec_experimental(ist->st->codec, 0);
1994         assert_avoptions(ist->opts);
1995     }
1996
1997     ist->pts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames*AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
1998     ist->next_pts = AV_NOPTS_VALUE;
1999     init_pts_correction(&ist->pts_ctx);
2000     ist->is_start = 1;
2001
2002     return 0;
2003 }
2004
2005 static int transcode_init(OutputFile *output_files,
2006                           int nb_output_files,
2007                           InputFile *input_files,
2008                           int nb_input_files)
2009 {
2010     int ret = 0, i, j, k;
2011     AVFormatContext *oc;
2012     AVCodecContext *codec, *icodec;
2013     OutputStream *ost;
2014     InputStream *ist;
2015     char error[1024];
2016     int want_sdp = 1;
2017
2018     /* init framerate emulation */
2019     for (i = 0; i < nb_input_files; i++) {
2020         InputFile *ifile = &input_files[i];
2021         if (ifile->rate_emu)
2022             for (j = 0; j < ifile->nb_streams; j++)
2023                 input_streams[j + ifile->ist_index].start = av_gettime();
2024     }
2025
2026     /* output stream init */
2027     for (i = 0; i < nb_output_files; i++) {
2028         oc = output_files[i].ctx;
2029         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2030             av_dump_format(oc, i, oc->filename, 1);
2031             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2032             return AVERROR(EINVAL);
2033         }
2034     }
2035
2036     /* for each output stream, we compute the right encoding parameters */
2037     for (i = 0; i < nb_output_streams; i++) {
2038         ost = &output_streams[i];
2039         oc  = output_files[ost->file_index].ctx;
2040         ist = &input_streams[ost->source_index];
2041
2042         if (ost->attachment_filename)
2043             continue;
2044
2045         codec  = ost->st->codec;
2046         icodec = ist->st->codec;
2047
2048         ost->st->disposition          = ist->st->disposition;
2049         codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2050         codec->chroma_sample_location = icodec->chroma_sample_location;
2051
2052         if (ost->stream_copy) {
2053             uint64_t extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2054
2055             if (extra_size > INT_MAX) {
2056                 return AVERROR(EINVAL);
2057             }
2058
2059             /* if stream_copy is selected, no need to decode or encode */
2060             codec->codec_id   = icodec->codec_id;
2061             codec->codec_type = icodec->codec_type;
2062
2063             if (!codec->codec_tag) {
2064                 if (!oc->oformat->codec_tag ||
2065                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2066                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2067                     codec->codec_tag = icodec->codec_tag;
2068             }
2069
2070             codec->bit_rate       = icodec->bit_rate;
2071             codec->rc_max_rate    = icodec->rc_max_rate;
2072             codec->rc_buffer_size = icodec->rc_buffer_size;
2073             codec->extradata      = av_mallocz(extra_size);
2074             if (!codec->extradata) {
2075                 return AVERROR(ENOMEM);
2076             }
2077             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2078             codec->extradata_size = icodec->extradata_size;
2079             if (!copy_tb) {
2080                 codec->time_base      = icodec->time_base;
2081                 codec->time_base.num *= icodec->ticks_per_frame;
2082                 av_reduce(&codec->time_base.num, &codec->time_base.den,
2083                           codec->time_base.num, codec->time_base.den, INT_MAX);
2084             } else
2085                 codec->time_base = ist->st->time_base;
2086
2087             switch(codec->codec_type) {
2088             case AVMEDIA_TYPE_AUDIO:
2089                 if(audio_volume != 256) {
2090                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2091                     exit_program(1);
2092                 }
2093                 codec->channel_layout     = icodec->channel_layout;
2094                 codec->sample_rate        = icodec->sample_rate;
2095                 codec->channels           = icodec->channels;
2096                 codec->frame_size         = icodec->frame_size;
2097                 codec->audio_service_type = icodec->audio_service_type;
2098                 codec->block_align        = icodec->block_align;
2099                 break;
2100             case AVMEDIA_TYPE_VIDEO:
2101                 codec->pix_fmt            = icodec->pix_fmt;
2102                 codec->width              = icodec->width;
2103                 codec->height             = icodec->height;
2104                 codec->has_b_frames       = icodec->has_b_frames;
2105                 if (!codec->sample_aspect_ratio.num) {
2106                     codec->sample_aspect_ratio   =
2107                     ost->st->sample_aspect_ratio =
2108                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2109                         ist->st->codec->sample_aspect_ratio.num ?
2110                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2111                 }
2112                 break;
2113             case AVMEDIA_TYPE_SUBTITLE:
2114                 codec->width  = icodec->width;
2115                 codec->height = icodec->height;
2116                 break;
2117             case AVMEDIA_TYPE_DATA:
2118             case AVMEDIA_TYPE_ATTACHMENT:
2119                 break;
2120             default:
2121                 abort();
2122             }
2123         } else {
2124             if (!ost->enc)
2125                 ost->enc = avcodec_find_encoder(ost->st->codec->codec_id);
2126
2127             ist->decoding_needed = 1;
2128             ost->encoding_needed = 1;
2129
2130             switch(codec->codec_type) {
2131             case AVMEDIA_TYPE_AUDIO:
2132                 ost->fifo = av_fifo_alloc(1024);
2133                 if (!ost->fifo) {
2134                     return AVERROR(ENOMEM);
2135                 }
2136                 ost->reformat_pair = MAKE_SFMT_PAIR(AV_SAMPLE_FMT_NONE,AV_SAMPLE_FMT_NONE);
2137
2138                 if (!codec->sample_rate)
2139                     codec->sample_rate = icodec->sample_rate;
2140                 choose_sample_rate(ost->st, ost->enc);
2141                 codec->time_base = (AVRational){1, codec->sample_rate};
2142
2143                 if (codec->sample_fmt == AV_SAMPLE_FMT_NONE)
2144                     codec->sample_fmt = icodec->sample_fmt;
2145                 choose_sample_fmt(ost->st, ost->enc);
2146
2147                 if (!codec->channels)
2148                     codec->channels = icodec->channels;
2149                 codec->channel_layout = icodec->channel_layout;
2150                 if (av_get_channel_layout_nb_channels(codec->channel_layout) != codec->channels)
2151                     codec->channel_layout = 0;
2152
2153                 ost->audio_resample       = codec-> sample_rate != icodec->sample_rate || audio_sync_method > 1;
2154                 icodec->request_channels  = codec-> channels;
2155                 ost->resample_sample_fmt  = icodec->sample_fmt;
2156                 ost->resample_sample_rate = icodec->sample_rate;
2157                 ost->resample_channels    = icodec->channels;
2158                 break;
2159             case AVMEDIA_TYPE_VIDEO:
2160                 if (codec->pix_fmt == PIX_FMT_NONE)
2161                     codec->pix_fmt = icodec->pix_fmt;
2162                 choose_pixel_fmt(ost->st, ost->enc);
2163
2164                 if (ost->st->codec->pix_fmt == PIX_FMT_NONE) {
2165                     av_log(NULL, AV_LOG_FATAL, "Video pixel format is unknown, stream cannot be encoded\n");
2166                     exit_program(1);
2167                 }
2168
2169                 if (!codec->width || !codec->height) {
2170                     codec->width  = icodec->width;
2171                     codec->height = icodec->height;
2172                 }
2173
2174                 ost->video_resample = codec->width   != icodec->width  ||
2175                                       codec->height  != icodec->height ||
2176                                       codec->pix_fmt != icodec->pix_fmt;
2177                 if (ost->video_resample) {
2178 #if !CONFIG_AVFILTER
2179                     avcodec_get_frame_defaults(&ost->pict_tmp);
2180                     if(avpicture_alloc((AVPicture*)&ost->pict_tmp, codec->pix_fmt,
2181                                        codec->width, codec->height)) {
2182                         av_log(NULL, AV_LOG_FATAL, "Cannot allocate temp picture, check pix fmt\n");
2183                         exit_program(1);
2184                     }
2185                     ost->img_resample_ctx = sws_getContext(
2186                         icodec->width,
2187                         icodec->height,
2188                         icodec->pix_fmt,
2189                         codec->width,
2190                         codec->height,
2191                         codec->pix_fmt,
2192                         ost->sws_flags, NULL, NULL, NULL);
2193                     if (ost->img_resample_ctx == NULL) {
2194                         av_log(NULL, AV_LOG_FATAL, "Cannot get resampling context\n");
2195                         exit_program(1);
2196                     }
2197 #endif
2198                     codec->bits_per_raw_sample= 0;
2199                 }
2200
2201                 ost->resample_height  = icodec->height;
2202                 ost->resample_width   = icodec->width;
2203                 ost->resample_pix_fmt = icodec->pix_fmt;
2204
2205                 if (!ost->frame_rate.num)
2206                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25,1};
2207                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2208                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2209                     ost->frame_rate = ost->enc->supported_framerates[idx];
2210                 }
2211                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
2212
2213 #if CONFIG_AVFILTER
2214                 if (configure_video_filters(ist, ost)) {
2215                     av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2216                     exit(1);
2217                 }
2218 #endif
2219                 break;
2220             case AVMEDIA_TYPE_SUBTITLE:
2221                 break;
2222             default:
2223                 abort();
2224                 break;
2225             }
2226             /* two pass mode */
2227             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
2228                 char logfilename[1024];
2229                 FILE *f;
2230
2231                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2232                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
2233                          i);
2234                 if (codec->flags & CODEC_FLAG_PASS1) {
2235                     f = fopen(logfilename, "wb");
2236                     if (!f) {
2237                         av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2238                                logfilename, strerror(errno));
2239                         exit_program(1);
2240                     }
2241                     ost->logfile = f;
2242                 } else {
2243                     char  *logbuffer;
2244                     size_t logbuffer_size;
2245                     if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2246                         av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2247                                logfilename);
2248                         exit_program(1);
2249                     }
2250                     codec->stats_in = logbuffer;
2251                 }
2252             }
2253         }
2254         if(codec->codec_type == AVMEDIA_TYPE_VIDEO){
2255             int        size = codec->width * codec->height;
2256             bit_buffer_size = FFMAX(bit_buffer_size, 6*size + 200);
2257         }
2258     }
2259
2260     if (!bit_buffer)
2261         bit_buffer = av_malloc(bit_buffer_size);
2262     if (!bit_buffer) {
2263         av_log(NULL, AV_LOG_ERROR, "Cannot allocate %d bytes output buffer\n",
2264                bit_buffer_size);
2265         return AVERROR(ENOMEM);
2266     }
2267
2268     /* open each encoder */
2269     for (i = 0; i < nb_output_streams; i++) {
2270         ost = &output_streams[i];
2271         if (ost->encoding_needed) {
2272             AVCodec      *codec = ost->enc;
2273             AVCodecContext *dec = input_streams[ost->source_index].st->codec;
2274             if (!codec) {
2275                 snprintf(error, sizeof(error), "Encoder (codec id %d) not found for output stream #%d:%d",
2276                          ost->st->codec->codec_id, ost->file_index, ost->index);
2277                 ret = AVERROR(EINVAL);
2278                 goto dump_format;
2279             }
2280             if (dec->subtitle_header) {
2281                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
2282                 if (!ost->st->codec->subtitle_header) {
2283                     ret = AVERROR(ENOMEM);
2284                     goto dump_format;
2285                 }
2286                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2287                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2288             }
2289             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
2290                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2291                         ost->file_index, ost->index);
2292                 ret = AVERROR(EINVAL);
2293                 goto dump_format;
2294             }
2295             assert_codec_experimental(ost->st->codec, 1);
2296             assert_avoptions(ost->opts);
2297             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2298                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2299                                              "It takes bits/s as argument, not kbits/s\n");
2300             extra_size += ost->st->codec->extradata_size;
2301
2302             if (ost->st->codec->me_threshold)
2303                 input_streams[ost->source_index].st->codec->debug |= FF_DEBUG_MV;
2304         }
2305     }
2306
2307     /* init input streams */
2308     for (i = 0; i < nb_input_streams; i++)
2309         if ((ret = init_input_stream(i, output_streams, nb_output_streams, error, sizeof(error))) < 0)
2310             goto dump_format;
2311
2312     /* discard unused programs */
2313     for (i = 0; i < nb_input_files; i++) {
2314         InputFile *ifile = &input_files[i];
2315         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2316             AVProgram *p = ifile->ctx->programs[j];
2317             int discard  = AVDISCARD_ALL;
2318
2319             for (k = 0; k < p->nb_stream_indexes; k++)
2320                 if (!input_streams[ifile->ist_index + p->stream_index[k]].discard) {
2321                     discard = AVDISCARD_DEFAULT;
2322                     break;
2323                 }
2324             p->discard = discard;
2325         }
2326     }
2327
2328     /* open files and write file headers */
2329     for (i = 0; i < nb_output_files; i++) {
2330         oc = output_files[i].ctx;
2331         oc->interrupt_callback = int_cb;
2332         if (avformat_write_header(oc, &output_files[i].opts) < 0) {
2333             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?)", i);
2334             ret = AVERROR(EINVAL);
2335             goto dump_format;
2336         }
2337         assert_avoptions(output_files[i].opts);
2338         if (strcmp(oc->oformat->name, "rtp")) {
2339             want_sdp = 0;
2340         }
2341     }
2342
2343  dump_format:
2344     /* dump the file output parameters - cannot be done before in case
2345        of stream copy */
2346     for (i = 0; i < nb_output_files; i++) {
2347         av_dump_format(output_files[i].ctx, i, output_files[i].ctx->filename, 1);
2348     }
2349
2350     /* dump the stream mapping */
2351     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2352     for (i = 0; i < nb_output_streams; i++) {
2353         ost = &output_streams[i];
2354
2355         if (ost->attachment_filename) {
2356             /* an attached file */
2357             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2358                    ost->attachment_filename, ost->file_index, ost->index);
2359             continue;
2360         }
2361         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2362                input_streams[ost->source_index].file_index,
2363                input_streams[ost->source_index].st->index,
2364                ost->file_index,
2365                ost->index);
2366         if (ost->sync_ist != &input_streams[ost->source_index])
2367             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2368                    ost->sync_ist->file_index,
2369                    ost->sync_ist->st->index);
2370         if (ost->stream_copy)
2371             av_log(NULL, AV_LOG_INFO, " (copy)");
2372         else
2373             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index].dec ?
2374                    input_streams[ost->source_index].dec->name : "?",
2375                    ost->enc ? ost->enc->name : "?");
2376         av_log(NULL, AV_LOG_INFO, "\n");
2377     }
2378
2379     if (ret) {
2380         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2381         return ret;
2382     }
2383
2384     if (want_sdp) {
2385         print_sdp(output_files, nb_output_files);
2386     }
2387
2388     return 0;
2389 }
2390
2391 /*
2392  * The following code is the main loop of the file converter
2393  */
2394 static int transcode(OutputFile *output_files,
2395                      int nb_output_files,
2396                      InputFile *input_files,
2397                      int nb_input_files)
2398 {
2399     int ret, i;
2400     AVFormatContext *is, *os;
2401     OutputStream *ost;
2402     InputStream *ist;
2403     uint8_t *no_packet;
2404     int no_packet_count=0;
2405     int64_t timer_start;
2406
2407     if (!(no_packet = av_mallocz(nb_input_files)))
2408         exit_program(1);
2409
2410     ret = transcode_init(output_files, nb_output_files, input_files, nb_input_files);
2411     if (ret < 0)
2412         goto fail;
2413
2414     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2415     term_init();
2416
2417     timer_start = av_gettime();
2418
2419     for(; received_sigterm == 0;) {
2420         int file_index, ist_index;
2421         AVPacket pkt;
2422         int64_t ipts_min;
2423         double opts_min;
2424
2425         ipts_min = INT64_MAX;
2426         opts_min= 1e100;
2427
2428         /* select the stream that we must read now by looking at the
2429            smallest output pts */
2430         file_index = -1;
2431         for (i = 0; i < nb_output_streams; i++) {
2432             OutputFile *of;
2433             int64_t ipts;
2434             double  opts;
2435             ost = &output_streams[i];
2436             of = &output_files[ost->file_index];
2437             os = output_files[ost->file_index].ctx;
2438             ist = &input_streams[ost->source_index];
2439             if (ost->is_past_recording_time || no_packet[ist->file_index] ||
2440                 (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2441                 continue;
2442             opts = ost->st->pts.val * av_q2d(ost->st->time_base);
2443             ipts = ist->pts;
2444             if (!input_files[ist->file_index].eof_reached){
2445                 if(ipts < ipts_min) {
2446                     ipts_min = ipts;
2447                     if(input_sync ) file_index = ist->file_index;
2448                 }
2449                 if(opts < opts_min) {
2450                     opts_min = opts;
2451                     if(!input_sync) file_index = ist->file_index;
2452                 }
2453             }
2454             if (ost->frame_number >= ost->max_frames) {
2455                 int j;
2456                 for (j = 0; j < of->ctx->nb_streams; j++)
2457                     output_streams[of->ost_index + j].is_past_recording_time = 1;
2458                 continue;
2459             }
2460         }
2461         /* if none, if is finished */
2462         if (file_index < 0) {
2463             if(no_packet_count){
2464                 no_packet_count=0;
2465                 memset(no_packet, 0, nb_input_files);
2466                 usleep(10000);
2467                 continue;
2468             }
2469             break;
2470         }
2471
2472         /* read a frame from it and output it in the fifo */
2473         is = input_files[file_index].ctx;
2474         ret= av_read_frame(is, &pkt);
2475         if(ret == AVERROR(EAGAIN)){
2476             no_packet[file_index]=1;
2477             no_packet_count++;
2478             continue;
2479         }
2480         if (ret < 0) {
2481             input_files[file_index].eof_reached = 1;
2482             if (opt_shortest)
2483                 break;
2484             else
2485                 continue;
2486         }
2487
2488         no_packet_count=0;
2489         memset(no_packet, 0, nb_input_files);
2490
2491         if (do_pkt_dump) {
2492             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2493                              is->streams[pkt.stream_index]);
2494         }
2495         /* the following test is needed in case new streams appear
2496            dynamically in stream : we ignore them */
2497         if (pkt.stream_index >= input_files[file_index].nb_streams)
2498             goto discard_packet;
2499         ist_index = input_files[file_index].ist_index + pkt.stream_index;
2500         ist = &input_streams[ist_index];
2501         if (ist->discard)
2502             goto discard_packet;
2503
2504         if (pkt.dts != AV_NOPTS_VALUE)
2505             pkt.dts += av_rescale_q(input_files[ist->file_index].ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2506         if (pkt.pts != AV_NOPTS_VALUE)
2507             pkt.pts += av_rescale_q(input_files[ist->file_index].ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2508
2509         if(pkt.pts != AV_NOPTS_VALUE)
2510             pkt.pts *= ist->ts_scale;
2511         if(pkt.dts != AV_NOPTS_VALUE)
2512             pkt.dts *= ist->ts_scale;
2513
2514 //        fprintf(stderr, "next:%"PRId64" dts:%"PRId64" off:%"PRId64" %d\n", ist->next_pts, pkt.dts, input_files[ist->file_index].ts_offset, ist->st->codec->codec_type);
2515         if (pkt.dts != AV_NOPTS_VALUE && ist->next_pts != AV_NOPTS_VALUE
2516             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
2517             int64_t pkt_dts= av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2518             int64_t delta= pkt_dts - ist->next_pts;
2519             if((FFABS(delta) > 1LL*dts_delta_threshold*AV_TIME_BASE || pkt_dts+1<ist->pts)&& !copy_ts){
2520                 input_files[ist->file_index].ts_offset -= delta;
2521                 av_log(NULL, AV_LOG_DEBUG, "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2522                        delta, input_files[ist->file_index].ts_offset);
2523                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2524                 if(pkt.pts != AV_NOPTS_VALUE)
2525                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2526             }
2527         }
2528
2529         //fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
2530         if (output_packet(ist, output_streams, nb_output_streams, &pkt) < 0) {
2531
2532             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
2533                    ist->file_index, ist->st->index);
2534             if (exit_on_error)
2535                 exit_program(1);
2536             av_free_packet(&pkt);
2537             continue;
2538         }
2539
2540     discard_packet:
2541         av_free_packet(&pkt);
2542
2543         /* dump report by using the output first video and audio streams */
2544         print_report(output_files, output_streams, nb_output_streams, 0, timer_start);
2545     }
2546
2547     /* at the end of stream, we must flush the decoder buffers */
2548     for (i = 0; i < nb_input_streams; i++) {
2549         ist = &input_streams[i];
2550         if (ist->decoding_needed) {
2551             output_packet(ist, output_streams, nb_output_streams, NULL);
2552         }
2553     }
2554     flush_encoders(output_streams, nb_output_streams);
2555
2556     term_exit();
2557
2558     /* write the trailer if needed and close file */
2559     for(i=0;i<nb_output_files;i++) {
2560         os = output_files[i].ctx;
2561         av_write_trailer(os);
2562     }
2563
2564     /* dump report by using the first video and audio streams */
2565     print_report(output_files, output_streams, nb_output_streams, 1, timer_start);
2566
2567     /* close each encoder */
2568     for (i = 0; i < nb_output_streams; i++) {
2569         ost = &output_streams[i];
2570         if (ost->encoding_needed) {
2571             av_freep(&ost->st->codec->stats_in);
2572             avcodec_close(ost->st->codec);
2573         }
2574 #if CONFIG_AVFILTER
2575         avfilter_graph_free(&ost->graph);
2576 #endif
2577     }
2578
2579     /* close each decoder */
2580     for (i = 0; i < nb_input_streams; i++) {
2581         ist = &input_streams[i];
2582         if (ist->decoding_needed) {
2583             avcodec_close(ist->st->codec);
2584         }
2585     }
2586
2587     /* finished ! */
2588     ret = 0;
2589
2590  fail:
2591     av_freep(&bit_buffer);
2592     av_freep(&no_packet);
2593
2594     if (output_streams) {
2595         for (i = 0; i < nb_output_streams; i++) {
2596             ost = &output_streams[i];
2597             if (ost) {
2598                 if (ost->stream_copy)
2599                     av_freep(&ost->st->codec->extradata);
2600                 if (ost->logfile) {
2601                     fclose(ost->logfile);
2602                     ost->logfile = NULL;
2603                 }
2604                 av_fifo_free(ost->fifo); /* works even if fifo is not
2605                                              initialized but set to zero */
2606                 av_freep(&ost->st->codec->subtitle_header);
2607                 av_free(ost->pict_tmp.data[0]);
2608                 av_free(ost->forced_kf_pts);
2609                 if (ost->video_resample)
2610                     sws_freeContext(ost->img_resample_ctx);
2611                 if (ost->resample)
2612                     audio_resample_close(ost->resample);
2613                 if (ost->reformat_ctx)
2614                     av_audio_convert_free(ost->reformat_ctx);
2615                 av_dict_free(&ost->opts);
2616             }
2617         }
2618     }
2619     return ret;
2620 }
2621
2622 static double parse_frame_aspect_ratio(const char *arg)
2623 {
2624     int x = 0, y = 0;
2625     double ar = 0;
2626     const char *p;
2627     char *end;
2628
2629     p = strchr(arg, ':');
2630     if (p) {
2631         x = strtol(arg, &end, 10);
2632         if (end == p)
2633             y = strtol(end+1, &end, 10);
2634         if (x > 0 && y > 0)
2635             ar = (double)x / (double)y;
2636     } else
2637         ar = strtod(arg, NULL);
2638
2639     if (!ar) {
2640         av_log(NULL, AV_LOG_FATAL, "Incorrect aspect ratio specification.\n");
2641         exit_program(1);
2642     }
2643     return ar;
2644 }
2645
2646 static int opt_audio_codec(OptionsContext *o, const char *opt, const char *arg)
2647 {
2648     return parse_option(o, "codec:a", arg, options);
2649 }
2650
2651 static int opt_video_codec(OptionsContext *o, const char *opt, const char *arg)
2652 {
2653     return parse_option(o, "codec:v", arg, options);
2654 }
2655
2656 static int opt_subtitle_codec(OptionsContext *o, const char *opt, const char *arg)
2657 {
2658     return parse_option(o, "codec:s", arg, options);
2659 }
2660
2661 static int opt_data_codec(OptionsContext *o, const char *opt, const char *arg)
2662 {
2663     return parse_option(o, "codec:d", arg, options);
2664 }
2665
2666 static int opt_map(OptionsContext *o, const char *opt, const char *arg)
2667 {
2668     StreamMap *m = NULL;
2669     int i, negative = 0, file_idx;
2670     int sync_file_idx = -1, sync_stream_idx;
2671     char *p, *sync;
2672     char *map;
2673
2674     if (*arg == '-') {
2675         negative = 1;
2676         arg++;
2677     }
2678     map = av_strdup(arg);
2679
2680     /* parse sync stream first, just pick first matching stream */
2681     if (sync = strchr(map, ',')) {
2682         *sync = 0;
2683         sync_file_idx = strtol(sync + 1, &sync, 0);
2684         if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
2685             av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
2686             exit_program(1);
2687         }
2688         if (*sync)
2689             sync++;
2690         for (i = 0; i < input_files[sync_file_idx].nb_streams; i++)
2691             if (check_stream_specifier(input_files[sync_file_idx].ctx,
2692                                        input_files[sync_file_idx].ctx->streams[i], sync) == 1) {
2693                 sync_stream_idx = i;
2694                 break;
2695             }
2696         if (i == input_files[sync_file_idx].nb_streams) {
2697             av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
2698                                        "match any streams.\n", arg);
2699             exit_program(1);
2700         }
2701     }
2702
2703
2704     file_idx = strtol(map, &p, 0);
2705     if (file_idx >= nb_input_files || file_idx < 0) {
2706         av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
2707         exit_program(1);
2708     }
2709     if (negative)
2710         /* disable some already defined maps */
2711         for (i = 0; i < o->nb_stream_maps; i++) {
2712             m = &o->stream_maps[i];
2713             if (file_idx == m->file_index &&
2714                 check_stream_specifier(input_files[m->file_index].ctx,
2715                                        input_files[m->file_index].ctx->streams[m->stream_index],
2716                                        *p == ':' ? p + 1 : p) > 0)
2717                 m->disabled = 1;
2718         }
2719     else
2720         for (i = 0; i < input_files[file_idx].nb_streams; i++) {
2721             if (check_stream_specifier(input_files[file_idx].ctx, input_files[file_idx].ctx->streams[i],
2722                         *p == ':' ? p + 1 : p) <= 0)
2723                 continue;
2724             o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
2725                                         &o->nb_stream_maps, o->nb_stream_maps + 1);
2726             m = &o->stream_maps[o->nb_stream_maps - 1];
2727
2728             m->file_index   = file_idx;
2729             m->stream_index = i;
2730
2731             if (sync_file_idx >= 0) {
2732                 m->sync_file_index   = sync_file_idx;
2733                 m->sync_stream_index = sync_stream_idx;
2734             } else {
2735                 m->sync_file_index   = file_idx;
2736                 m->sync_stream_index = i;
2737             }
2738         }
2739
2740     if (!m) {
2741         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
2742         exit_program(1);
2743     }
2744
2745     av_freep(&map);
2746     return 0;
2747 }
2748
2749 static int opt_attach(OptionsContext *o, const char *opt, const char *arg)
2750 {
2751     o->attachments = grow_array(o->attachments, sizeof(*o->attachments),
2752                                 &o->nb_attachments, o->nb_attachments + 1);
2753     o->attachments[o->nb_attachments - 1] = arg;
2754     return 0;
2755 }
2756
2757 /**
2758  * Parse a metadata specifier in arg.
2759  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
2760  * @param index for type c/p, chapter/program index is written here
2761  * @param stream_spec for type s, the stream specifier is written here
2762  */
2763 static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
2764 {
2765     if (*arg) {
2766         *type = *arg;
2767         switch (*arg) {
2768         case 'g':
2769             break;
2770         case 's':
2771             if (*(++arg) && *arg != ':') {
2772                 av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
2773                 exit_program(1);
2774             }
2775             *stream_spec = *arg == ':' ? arg + 1 : "";
2776             break;
2777         case 'c':
2778         case 'p':
2779             if (*(++arg) == ':')
2780                 *index = strtol(++arg, NULL, 0);
2781             break;
2782         default:
2783             av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
2784             exit_program(1);
2785         }
2786     } else
2787         *type = 'g';
2788 }
2789
2790 static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
2791 {
2792     AVDictionary **meta_in = NULL;
2793     AVDictionary **meta_out;
2794     int i, ret = 0;
2795     char type_in, type_out;
2796     const char *istream_spec = NULL, *ostream_spec = NULL;
2797     int idx_in = 0, idx_out = 0;
2798
2799     parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
2800     parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
2801
2802     if (type_in == 'g' || type_out == 'g')
2803         o->metadata_global_manual = 1;
2804     if (type_in == 's' || type_out == 's')
2805         o->metadata_streams_manual = 1;
2806     if (type_in == 'c' || type_out == 'c')
2807         o->metadata_chapters_manual = 1;
2808
2809 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
2810     if ((index) < 0 || (index) >= (nb_elems)) {\
2811         av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
2812                 (desc), (index));\
2813         exit_program(1);\
2814     }
2815
2816 #define SET_DICT(type, meta, context, index)\
2817         switch (type) {\
2818         case 'g':\
2819             meta = &context->metadata;\
2820             break;\
2821         case 'c':\
2822             METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
2823             meta = &context->chapters[index]->metadata;\
2824             break;\
2825         case 'p':\
2826             METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
2827             meta = &context->programs[index]->metadata;\
2828             break;\
2829         }\
2830
2831     SET_DICT(type_in, meta_in, ic, idx_in);
2832     SET_DICT(type_out, meta_out, oc, idx_out);
2833
2834     /* for input streams choose first matching stream */
2835     if (type_in == 's') {
2836         for (i = 0; i < ic->nb_streams; i++) {
2837             if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
2838                 meta_in = &ic->streams[i]->metadata;
2839                 break;
2840             } else if (ret < 0)
2841                 exit_program(1);
2842         }
2843         if (!meta_in) {
2844             av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
2845             exit_program(1);
2846         }
2847     }
2848
2849     if (type_out == 's') {
2850         for (i = 0; i < oc->nb_streams; i++) {
2851             if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
2852                 meta_out = &oc->streams[i]->metadata;
2853                 av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
2854             } else if (ret < 0)
2855                 exit_program(1);
2856         }
2857     } else
2858         av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
2859
2860     return 0;
2861 }
2862
2863 static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
2864 {
2865     const char *codec_string = encoder ? "encoder" : "decoder";
2866     AVCodec *codec;
2867
2868     codec = encoder ?
2869         avcodec_find_encoder_by_name(name) :
2870         avcodec_find_decoder_by_name(name);
2871     if(!codec) {
2872         av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
2873         exit_program(1);
2874     }
2875     if(codec->type != type) {
2876         av_log(NULL, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
2877         exit_program(1);
2878     }
2879     return codec;
2880 }
2881
2882 static AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVStream *st)
2883 {
2884     char *codec_name = NULL;
2885
2886     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
2887     if (codec_name) {
2888         AVCodec *codec = find_codec_or_die(codec_name, st->codec->codec_type, 0);
2889         st->codec->codec_id = codec->id;
2890         return codec;
2891     } else
2892         return avcodec_find_decoder(st->codec->codec_id);
2893 }
2894
2895 /**
2896  * Add all the streams from the given input file to the global
2897  * list of input streams.
2898  */
2899 static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
2900 {
2901     int i, rfps, rfps_base;
2902
2903     for (i = 0; i < ic->nb_streams; i++) {
2904         AVStream *st = ic->streams[i];
2905         AVCodecContext *dec = st->codec;
2906         InputStream *ist;
2907
2908         input_streams = grow_array(input_streams, sizeof(*input_streams), &nb_input_streams, nb_input_streams + 1);
2909         ist = &input_streams[nb_input_streams - 1];
2910         ist->st = st;
2911         ist->file_index = nb_input_files;
2912         ist->discard = 1;
2913         ist->opts = filter_codec_opts(codec_opts, ist->st->codec->codec_id, ic, st);
2914
2915         ist->ts_scale = 1.0;
2916         MATCH_PER_STREAM_OPT(ts_scale, dbl, ist->ts_scale, ic, st);
2917
2918         ist->dec = choose_decoder(o, ic, st);
2919
2920         switch (dec->codec_type) {
2921         case AVMEDIA_TYPE_AUDIO:
2922             if (o->audio_disable)
2923                 st->discard= AVDISCARD_ALL;
2924             break;
2925         case AVMEDIA_TYPE_VIDEO:
2926             rfps      = ic->streams[i]->r_frame_rate.num;
2927             rfps_base = ic->streams[i]->r_frame_rate.den;
2928             if (dec->lowres) {
2929                 dec->flags |= CODEC_FLAG_EMU_EDGE;
2930                 dec->height >>= dec->lowres;
2931                 dec->width  >>= dec->lowres;
2932             }
2933
2934             if (dec->time_base.den != rfps*dec->ticks_per_frame || dec->time_base.num != rfps_base) {
2935
2936                 av_log(NULL, AV_LOG_INFO,"\nSeems stream %d codec frame rate differs from container frame rate: %2.2f (%d/%d) -> %2.2f (%d/%d)\n",
2937                        i, (float)dec->time_base.den / dec->time_base.num, dec->time_base.den, dec->time_base.num,
2938                        (float)rfps / rfps_base, rfps, rfps_base);
2939             }
2940
2941             if (o->video_disable)
2942                 st->discard= AVDISCARD_ALL;
2943             else if(video_discard)
2944                 st->discard= video_discard;
2945             break;
2946         case AVMEDIA_TYPE_DATA:
2947             break;
2948         case AVMEDIA_TYPE_SUBTITLE:
2949             if (o->subtitle_disable)
2950                 st->discard = AVDISCARD_ALL;
2951             break;
2952         case AVMEDIA_TYPE_ATTACHMENT:
2953         case AVMEDIA_TYPE_UNKNOWN:
2954             break;
2955         default:
2956             abort();
2957         }
2958     }
2959 }
2960
2961 static void assert_file_overwrite(const char *filename)
2962 {
2963     if (!file_overwrite &&
2964         (strchr(filename, ':') == NULL || filename[1] == ':' ||
2965          av_strstart(filename, "file:", NULL))) {
2966         if (avio_check(filename, 0) == 0) {
2967             if (!using_stdin) {
2968                 fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
2969                 fflush(stderr);
2970                 if (!read_yesno()) {
2971                     fprintf(stderr, "Not overwriting - exiting\n");
2972                     exit_program(1);
2973                 }
2974             }
2975             else {
2976                 fprintf(stderr,"File '%s' already exists. Exiting.\n", filename);
2977                 exit_program(1);
2978             }
2979         }
2980     }
2981 }
2982
2983 static void dump_attachment(AVStream *st, const char *filename)
2984 {
2985     int ret;
2986     AVIOContext *out = NULL;
2987     AVDictionaryEntry *e;
2988
2989     if (!st->codec->extradata_size) {
2990         av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
2991                nb_input_files - 1, st->index);
2992         return;
2993     }
2994     if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
2995         filename = e->value;
2996     if (!*filename) {
2997         av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
2998                "in stream #%d:%d.\n", nb_input_files - 1, st->index);
2999         exit_program(1);
3000     }
3001
3002     assert_file_overwrite(filename);
3003
3004     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
3005         av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
3006                filename);
3007         exit_program(1);
3008     }
3009
3010     avio_write(out, st->codec->extradata, st->codec->extradata_size);
3011     avio_flush(out);
3012     avio_close(out);
3013 }
3014
3015 static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
3016 {
3017     AVFormatContext *ic;
3018     AVInputFormat *file_iformat = NULL;
3019     int err, i, ret;
3020     int64_t timestamp;
3021     uint8_t buf[128];
3022     AVDictionary **opts;
3023     int orig_nb_streams;                     // number of streams before avformat_find_stream_info
3024
3025     if (o->format) {
3026         if (!(file_iformat = av_find_input_format(o->format))) {
3027             av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
3028             exit_program(1);
3029         }
3030     }
3031
3032     if (!strcmp(filename, "-"))
3033         filename = "pipe:";
3034
3035     using_stdin |= !strncmp(filename, "pipe:", 5) ||
3036                     !strcmp(filename, "/dev/stdin");
3037
3038     /* get default parameters from command line */
3039     ic = avformat_alloc_context();
3040     if (!ic) {
3041         print_error(filename, AVERROR(ENOMEM));
3042         exit_program(1);
3043     }
3044     if (o->nb_audio_sample_rate) {
3045         snprintf(buf, sizeof(buf), "%d", o->audio_sample_rate[o->nb_audio_sample_rate - 1].u.i);
3046         av_dict_set(&format_opts, "sample_rate", buf, 0);
3047     }
3048     if (o->nb_audio_channels) {
3049         snprintf(buf, sizeof(buf), "%d", o->audio_channels[o->nb_audio_channels - 1].u.i);
3050         av_dict_set(&format_opts, "channels", buf, 0);
3051     }
3052     if (o->nb_frame_rates) {
3053         av_dict_set(&format_opts, "framerate", o->frame_rates[o->nb_frame_rates - 1].u.str, 0);
3054     }
3055     if (o->nb_frame_sizes) {
3056         av_dict_set(&format_opts, "video_size", o->frame_sizes[o->nb_frame_sizes - 1].u.str, 0);
3057     }
3058     if (o->nb_frame_pix_fmts)
3059         av_dict_set(&format_opts, "pixel_format", o->frame_pix_fmts[o->nb_frame_pix_fmts - 1].u.str, 0);
3060
3061     ic->flags |= AVFMT_FLAG_NONBLOCK;
3062     ic->interrupt_callback = int_cb;
3063
3064     /* open the input file with generic libav function */
3065     err = avformat_open_input(&ic, filename, file_iformat, &format_opts);
3066     if (err < 0) {
3067         print_error(filename, err);
3068         exit_program(1);
3069     }
3070     assert_avoptions(format_opts);
3071
3072     /* apply forced codec ids */
3073     for (i = 0; i < ic->nb_streams; i++)
3074         choose_decoder(o, ic, ic->streams[i]);
3075
3076     /* Set AVCodecContext options for avformat_find_stream_info */
3077     opts = setup_find_stream_info_opts(ic, codec_opts);
3078     orig_nb_streams = ic->nb_streams;
3079
3080     /* If not enough info to get the stream parameters, we decode the
3081        first frames to get it. (used in mpeg case for example) */
3082     ret = avformat_find_stream_info(ic, opts);
3083     if (ret < 0) {
3084         av_log(NULL, AV_LOG_FATAL, "%s: could not find codec parameters\n", filename);
3085         avformat_close_input(&ic);
3086         exit_program(1);
3087     }
3088
3089     timestamp = o->start_time;
3090     /* add the stream start time */
3091     if (ic->start_time != AV_NOPTS_VALUE)
3092         timestamp += ic->start_time;
3093
3094     /* if seeking requested, we execute it */
3095     if (o->start_time != 0) {
3096         ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
3097         if (ret < 0) {
3098             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
3099                    filename, (double)timestamp / AV_TIME_BASE);
3100         }
3101     }
3102
3103     /* update the current parameters so that they match the one of the input stream */
3104     add_input_streams(o, ic);
3105
3106     /* dump the file content */
3107     av_dump_format(ic, nb_input_files, filename, 0);
3108
3109     input_files = grow_array(input_files, sizeof(*input_files), &nb_input_files, nb_input_files + 1);
3110     input_files[nb_input_files - 1].ctx        = ic;
3111     input_files[nb_input_files - 1].ist_index  = nb_input_streams - ic->nb_streams;
3112     input_files[nb_input_files - 1].ts_offset  = o->input_ts_offset - (copy_ts ? 0 : timestamp);
3113     input_files[nb_input_files - 1].nb_streams = ic->nb_streams;
3114     input_files[nb_input_files - 1].rate_emu   = o->rate_emu;
3115
3116     for (i = 0; i < o->nb_dump_attachment; i++) {
3117         int j;
3118
3119         for (j = 0; j < ic->nb_streams; j++) {
3120             AVStream *st = ic->streams[j];
3121
3122             if (check_stream_specifier(ic, st, o->dump_attachment[i].specifier) == 1)
3123                 dump_attachment(st, o->dump_attachment[i].u.str);
3124         }
3125     }
3126
3127     for (i = 0; i < orig_nb_streams; i++)
3128         av_dict_free(&opts[i]);
3129     av_freep(&opts);
3130
3131     reset_options(o);
3132     return 0;
3133 }
3134
3135 static void parse_forced_key_frames(char *kf, OutputStream *ost,
3136                                     AVCodecContext *avctx)
3137 {
3138     char *p;
3139     int n = 1, i;
3140     int64_t t;
3141
3142     for (p = kf; *p; p++)
3143         if (*p == ',')
3144             n++;
3145     ost->forced_kf_count = n;
3146     ost->forced_kf_pts = av_malloc(sizeof(*ost->forced_kf_pts) * n);
3147     if (!ost->forced_kf_pts) {
3148         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
3149         exit_program(1);
3150     }
3151     for (i = 0; i < n; i++) {
3152         p = i ? strchr(p, ',') + 1 : kf;
3153         t = parse_time_or_die("force_key_frames", p, 1);
3154         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
3155     }
3156 }
3157
3158 static uint8_t *get_line(AVIOContext *s)
3159 {
3160     AVIOContext *line;
3161     uint8_t *buf;
3162     char c;
3163
3164     if (avio_open_dyn_buf(&line) < 0) {
3165         av_log(NULL, AV_LOG_FATAL, "Could not alloc buffer for reading preset.\n");
3166         exit_program(1);
3167     }
3168
3169     while ((c = avio_r8(s)) && c != '\n')
3170         avio_w8(line, c);
3171     avio_w8(line, 0);
3172     avio_close_dyn_buf(line, &buf);
3173
3174     return buf;
3175 }
3176
3177 static int get_preset_file_2(const char *preset_name, const char *codec_name, AVIOContext **s)
3178 {
3179     int i, ret = 1;
3180     char filename[1000];
3181     const char *base[3] = { getenv("AVCONV_DATADIR"),
3182                             getenv("HOME"),
3183                             AVCONV_DATADIR,
3184                             };
3185
3186     for (i = 0; i < FF_ARRAY_ELEMS(base) && ret; i++) {
3187         if (!base[i])
3188             continue;
3189         if (codec_name) {
3190             snprintf(filename, sizeof(filename), "%s%s/%s-%s.avpreset", base[i],
3191                      i != 1 ? "" : "/.avconv", codec_name, preset_name);
3192             ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
3193         }
3194         if (ret) {
3195             snprintf(filename, sizeof(filename), "%s%s/%s.avpreset", base[i],
3196                      i != 1 ? "" : "/.avconv", preset_name);
3197             ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
3198         }
3199     }
3200     return ret;
3201 }
3202
3203 static void choose_encoder(OptionsContext *o, AVFormatContext *s, OutputStream *ost)
3204 {
3205     char *codec_name = NULL;
3206
3207     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, ost->st);
3208     if (!codec_name) {
3209         ost->st->codec->codec_id = av_guess_codec(s->oformat, NULL, s->filename,
3210                                                   NULL, ost->st->codec->codec_type);
3211         ost->enc = avcodec_find_encoder(ost->st->codec->codec_id);
3212     } else if (!strcmp(codec_name, "copy"))
3213         ost->stream_copy = 1;
3214     else {
3215         ost->enc = find_codec_or_die(codec_name, ost->st->codec->codec_type, 1);
3216         ost->st->codec->codec_id = ost->enc->id;
3217     }
3218 }
3219
3220 static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, enum AVMediaType type)
3221 {
3222     OutputStream *ost;
3223     AVStream *st = avformat_new_stream(oc, NULL);
3224     int idx      = oc->nb_streams - 1, ret = 0;
3225     char *bsf = NULL, *next, *codec_tag = NULL;
3226     AVBitStreamFilterContext *bsfc, *bsfc_prev = NULL;
3227     double qscale = -1;
3228     char *buf = NULL, *arg = NULL, *preset = NULL;
3229     AVIOContext *s = NULL;
3230
3231     if (!st) {
3232         av_log(NULL, AV_LOG_FATAL, "Could not alloc stream.\n");
3233         exit_program(1);
3234     }
3235
3236     if (oc->nb_streams - 1 < o->nb_streamid_map)
3237         st->id = o->streamid_map[oc->nb_streams - 1];
3238
3239     output_streams = grow_array(output_streams, sizeof(*output_streams), &nb_output_streams,
3240                                 nb_output_streams + 1);
3241     ost = &output_streams[nb_output_streams - 1];
3242     ost->file_index = nb_output_files;
3243     ost->index = idx;
3244     ost->st    = st;
3245     st->codec->codec_type = type;
3246     choose_encoder(o, oc, ost);
3247     if (ost->enc) {
3248         ost->opts  = filter_codec_opts(codec_opts, ost->enc->id, oc, st);
3249     }
3250
3251     avcodec_get_context_defaults3(st->codec, ost->enc);
3252     st->codec->codec_type = type; // XXX hack, avcodec_get_context_defaults2() sets type to unknown for stream copy
3253
3254     MATCH_PER_STREAM_OPT(presets, str, preset, oc, st);
3255     if (preset && (!(ret = get_preset_file_2(preset, ost->enc->name, &s)))) {
3256         do  {
3257             buf = get_line(s);
3258             if (!buf[0] || buf[0] == '#') {
3259                 av_free(buf);
3260                 continue;
3261             }
3262             if (!(arg = strchr(buf, '='))) {
3263                 av_log(NULL, AV_LOG_FATAL, "Invalid line found in the preset file.\n");
3264                 exit_program(1);
3265             }
3266             *arg++ = 0;
3267             av_dict_set(&ost->opts, buf, arg, AV_DICT_DONT_OVERWRITE);
3268             av_free(buf);
3269         } while (!s->eof_reached);
3270         avio_close(s);
3271     }
3272     if (ret) {
3273         av_log(NULL, AV_LOG_FATAL,
3274                "Preset %s specified for stream %d:%d, but could not be opened.\n",
3275                preset, ost->file_index, ost->index);
3276         exit_program(1);
3277     }
3278
3279     ost->max_frames = INT64_MAX;
3280     MATCH_PER_STREAM_OPT(max_frames, i64, ost->max_frames, oc, st);
3281
3282     MATCH_PER_STREAM_OPT(bitstream_filters, str, bsf, oc, st);
3283     while (bsf) {
3284         if (next = strchr(bsf, ','))
3285             *next++ = 0;
3286         if (!(bsfc = av_bitstream_filter_init(bsf))) {
3287             av_log(NULL, AV_LOG_FATAL, "Unknown bitstream filter %s\n", bsf);
3288             exit_program(1);
3289         }
3290         if (bsfc_prev)
3291             bsfc_prev->next = bsfc;
3292         else
3293             ost->bitstream_filters = bsfc;
3294
3295         bsfc_prev = bsfc;
3296         bsf       = next;
3297     }
3298
3299     MATCH_PER_STREAM_OPT(codec_tags, str, codec_tag, oc, st);
3300     if (codec_tag) {
3301         uint32_t tag = strtol(codec_tag, &next, 0);
3302         if (*next)
3303             tag = AV_RL32(codec_tag);
3304         st->codec->codec_tag = tag;
3305     }
3306
3307     MATCH_PER_STREAM_OPT(qscale, dbl, qscale, oc, st);
3308     if (qscale >= 0 || same_quant) {
3309         st->codec->flags |= CODEC_FLAG_QSCALE;
3310         st->codec->global_quality = FF_QP2LAMBDA * qscale;
3311     }
3312
3313     if (oc->oformat->flags & AVFMT_GLOBALHEADER)
3314         st->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
3315
3316     av_opt_get_int(sws_opts, "sws_flags", 0, &ost->sws_flags);
3317     return ost;
3318 }
3319
3320 static void parse_matrix_coeffs(uint16_t *dest, const char *str)
3321 {
3322     int i;
3323     const char *p = str;
3324     for(i = 0;; i++) {
3325         dest[i] = atoi(p);
3326         if(i == 63)
3327             break;
3328         p = strchr(p, ',');
3329         if(!p) {
3330             av_log(NULL, AV_LOG_FATAL, "Syntax error in matrix \"%s\" at coeff %d\n", str, i);
3331             exit_program(1);
3332         }
3333         p++;
3334     }
3335 }
3336
3337 static OutputStream *new_video_stream(OptionsContext *o, AVFormatContext *oc)
3338 {
3339     AVStream *st;
3340     OutputStream *ost;
3341     AVCodecContext *video_enc;
3342
3343     ost = new_output_stream(o, oc, AVMEDIA_TYPE_VIDEO);
3344     st  = ost->st;
3345     video_enc = st->codec;
3346
3347     if (!ost->stream_copy) {
3348         const char *p = NULL;
3349         char *forced_key_frames = NULL, *frame_rate = NULL, *frame_size = NULL;
3350         char *frame_aspect_ratio = NULL, *frame_pix_fmt = NULL;
3351         char *intra_matrix = NULL, *inter_matrix = NULL, *filters = NULL;
3352         int i;
3353
3354         MATCH_PER_STREAM_OPT(frame_rates, str, frame_rate, oc, st);
3355         if (frame_rate && av_parse_video_rate(&ost->frame_rate, frame_rate) < 0) {
3356             av_log(NULL, AV_LOG_FATAL, "Invalid framerate value: %s\n", frame_rate);
3357             exit_program(1);
3358         }
3359
3360         MATCH_PER_STREAM_OPT(frame_sizes, str, frame_size, oc, st);
3361         if (frame_size && av_parse_video_size(&video_enc->width, &video_enc->height, frame_size) < 0) {
3362             av_log(NULL, AV_LOG_FATAL, "Invalid frame size: %s.\n", frame_size);
3363             exit_program(1);
3364         }
3365
3366         MATCH_PER_STREAM_OPT(frame_aspect_ratios, str, frame_aspect_ratio, oc, st);
3367         if (frame_aspect_ratio)
3368             ost->frame_aspect_ratio = parse_frame_aspect_ratio(frame_aspect_ratio);
3369
3370         MATCH_PER_STREAM_OPT(frame_pix_fmts, str, frame_pix_fmt, oc, st);
3371         if (frame_pix_fmt && (video_enc->pix_fmt = av_get_pix_fmt(frame_pix_fmt)) == PIX_FMT_NONE) {
3372             av_log(NULL, AV_LOG_FATAL, "Unknown pixel format requested: %s.\n", frame_pix_fmt);
3373             exit_program(1);
3374         }
3375         st->sample_aspect_ratio = video_enc->sample_aspect_ratio;
3376
3377         MATCH_PER_STREAM_OPT(intra_matrices, str, intra_matrix, oc, st);
3378         if (intra_matrix) {
3379             if (!(video_enc->intra_matrix = av_mallocz(sizeof(*video_enc->intra_matrix) * 64))) {
3380                 av_log(NULL, AV_LOG_FATAL, "Could not allocate memory for intra matrix.\n");
3381                 exit_program(1);
3382             }
3383             parse_matrix_coeffs(video_enc->intra_matrix, intra_matrix);
3384         }
3385         MATCH_PER_STREAM_OPT(inter_matrices, str, inter_matrix, oc, st);
3386         if (inter_matrix) {
3387             if (!(video_enc->inter_matrix = av_mallocz(sizeof(*video_enc->inter_matrix) * 64))) {
3388                 av_log(NULL, AV_LOG_FATAL, "Could not allocate memory for inter matrix.\n");
3389                 exit_program(1);
3390             }
3391             parse_matrix_coeffs(video_enc->inter_matrix, inter_matrix);
3392         }
3393
3394         MATCH_PER_STREAM_OPT(rc_overrides, str, p, oc, st);
3395         for(i=0; p; i++){
3396             int start, end, q;
3397             int e=sscanf(p, "%d,%d,%d", &start, &end, &q);
3398             if(e!=3){
3399                 av_log(NULL, AV_LOG_FATAL, "error parsing rc_override\n");
3400                 exit_program(1);
3401             }
3402             video_enc->rc_override=
3403                 av_realloc(video_enc->rc_override,
3404                            sizeof(RcOverride)*(i+1));
3405             video_enc->rc_override[i].start_frame= start;
3406             video_enc->rc_override[i].end_frame  = end;
3407             if(q>0){
3408                 video_enc->rc_override[i].qscale= q;
3409                 video_enc->rc_override[i].quality_factor= 1.0;
3410             }
3411             else{
3412                 video_enc->rc_override[i].qscale= 0;
3413                 video_enc->rc_override[i].quality_factor= -q/100.0;
3414             }
3415             p= strchr(p, '/');
3416             if(p) p++;
3417         }
3418         video_enc->rc_override_count=i;
3419         if (!video_enc->rc_initial_buffer_occupancy)
3420             video_enc->rc_initial_buffer_occupancy = video_enc->rc_buffer_size*3/4;
3421         video_enc->intra_dc_precision= intra_dc_precision - 8;
3422
3423         /* two pass mode */
3424         if (do_pass) {
3425             if (do_pass == 1) {
3426                 video_enc->flags |= CODEC_FLAG_PASS1;
3427             } else {
3428                 video_enc->flags |= CODEC_FLAG_PASS2;
3429             }
3430         }
3431
3432         MATCH_PER_STREAM_OPT(forced_key_frames, str, forced_key_frames, oc, st);
3433         if (forced_key_frames)
3434             parse_forced_key_frames(forced_key_frames, ost, video_enc);
3435
3436         MATCH_PER_STREAM_OPT(force_fps, i, ost->force_fps, oc, st);
3437
3438         ost->top_field_first = -1;
3439         MATCH_PER_STREAM_OPT(top_field_first, i, ost->top_field_first, oc, st);
3440
3441         MATCH_PER_STREAM_OPT(copy_initial_nonkeyframes, i, ost->copy_initial_nonkeyframes, oc ,st);
3442
3443 #if CONFIG_AVFILTER
3444         MATCH_PER_STREAM_OPT(filters, str, filters, oc, st);
3445         if (filters)
3446             ost->avfilter = av_strdup(filters);
3447 #endif
3448     }
3449
3450     return ost;
3451 }
3452
3453 static OutputStream *new_audio_stream(OptionsContext *o, AVFormatContext *oc)
3454 {
3455     AVStream *st;
3456     OutputStream *ost;
3457     AVCodecContext *audio_enc;
3458
3459     ost = new_output_stream(o, oc, AVMEDIA_TYPE_AUDIO);
3460     st  = ost->st;
3461
3462     audio_enc = st->codec;
3463     audio_enc->codec_type = AVMEDIA_TYPE_AUDIO;
3464
3465     if (!ost->stream_copy) {
3466         char *sample_fmt = NULL;
3467
3468         MATCH_PER_STREAM_OPT(audio_channels, i, audio_enc->channels, oc, st);
3469
3470         MATCH_PER_STREAM_OPT(sample_fmts, str, sample_fmt, oc, st);
3471         if (sample_fmt &&
3472             (audio_enc->sample_fmt = av_get_sample_fmt(sample_fmt)) == AV_SAMPLE_FMT_NONE) {
3473             av_log(NULL, AV_LOG_FATAL, "Invalid sample format '%s'\n", sample_fmt);
3474             exit_program(1);
3475         }
3476
3477         MATCH_PER_STREAM_OPT(audio_sample_rate, i, audio_enc->sample_rate, oc, st);
3478     }
3479
3480     return ost;
3481 }
3482
3483 static OutputStream *new_data_stream(OptionsContext *o, AVFormatContext *oc)
3484 {
3485     OutputStream *ost;
3486
3487     ost = new_output_stream(o, oc, AVMEDIA_TYPE_DATA);
3488     if (!ost->stream_copy) {
3489         av_log(NULL, AV_LOG_FATAL, "Data stream encoding not supported yet (only streamcopy)\n");
3490         exit_program(1);
3491     }
3492
3493     return ost;
3494 }
3495
3496 static OutputStream *new_attachment_stream(OptionsContext *o, AVFormatContext *oc)
3497 {
3498     OutputStream *ost = new_output_stream(o, oc, AVMEDIA_TYPE_ATTACHMENT);
3499     ost->stream_copy = 1;
3500     return ost;
3501 }
3502
3503 static OutputStream *new_subtitle_stream(OptionsContext *o, AVFormatContext *oc)
3504 {
3505     AVStream *st;
3506     OutputStream *ost;
3507     AVCodecContext *subtitle_enc;
3508
3509     ost = new_output_stream(o, oc, AVMEDIA_TYPE_SUBTITLE);
3510     st  = ost->st;
3511     subtitle_enc = st->codec;
3512
3513     subtitle_enc->codec_type = AVMEDIA_TYPE_SUBTITLE;
3514
3515     return ost;
3516 }
3517
3518 /* arg format is "output-stream-index:streamid-value". */
3519 static int opt_streamid(OptionsContext *o, const char *opt, const char *arg)
3520 {
3521     int idx;
3522     char *p;
3523     char idx_str[16];
3524
3525     av_strlcpy(idx_str, arg, sizeof(idx_str));
3526     p = strchr(idx_str, ':');
3527     if (!p) {
3528         av_log(NULL, AV_LOG_FATAL,
3529                "Invalid value '%s' for option '%s', required syntax is 'index:value'\n",
3530                arg, opt);
3531         exit_program(1);
3532     }
3533     *p++ = '\0';
3534     idx = parse_number_or_die(opt, idx_str, OPT_INT, 0, INT_MAX);
3535     o->streamid_map = grow_array(o->streamid_map, sizeof(*o->streamid_map), &o->nb_streamid_map, idx+1);
3536     o->streamid_map[idx] = parse_number_or_die(opt, p, OPT_INT, 0, INT_MAX);
3537     return 0;
3538 }
3539
3540 static int copy_chapters(InputFile *ifile, OutputFile *ofile, int copy_metadata)
3541 {
3542     AVFormatContext *is = ifile->ctx;
3543     AVFormatContext *os = ofile->ctx;
3544     int i;
3545
3546     for (i = 0; i < is->nb_chapters; i++) {
3547         AVChapter *in_ch = is->chapters[i], *out_ch;
3548         int64_t ts_off   = av_rescale_q(ofile->start_time - ifile->ts_offset,
3549                                       AV_TIME_BASE_Q, in_ch->time_base);
3550         int64_t rt       = (ofile->recording_time == INT64_MAX) ? INT64_MAX :
3551                            av_rescale_q(ofile->recording_time, AV_TIME_BASE_Q, in_ch->time_base);
3552
3553
3554         if (in_ch->end < ts_off)
3555             continue;
3556         if (rt != INT64_MAX && in_ch->start > rt + ts_off)
3557             break;
3558
3559         out_ch = av_mallocz(sizeof(AVChapter));
3560         if (!out_ch)
3561             return AVERROR(ENOMEM);
3562
3563         out_ch->id        = in_ch->id;
3564         out_ch->time_base = in_ch->time_base;
3565         out_ch->start     = FFMAX(0,  in_ch->start - ts_off);
3566         out_ch->end       = FFMIN(rt, in_ch->end   - ts_off);
3567
3568         if (copy_metadata)
3569             av_dict_copy(&out_ch->metadata, in_ch->metadata, 0);
3570
3571         os->nb_chapters++;
3572         os->chapters = av_realloc(os->chapters, sizeof(AVChapter)*os->nb_chapters);
3573         if (!os->chapters)
3574             return AVERROR(ENOMEM);
3575         os->chapters[os->nb_chapters - 1] = out_ch;
3576     }
3577     return 0;
3578 }
3579
3580 static void opt_output_file(void *optctx, const char *filename)
3581 {
3582     OptionsContext *o = optctx;
3583     AVFormatContext *oc;
3584     int i, err;
3585     AVOutputFormat *file_oformat;
3586     OutputStream *ost;
3587     InputStream  *ist;
3588
3589     if (!strcmp(filename, "-"))
3590         filename = "pipe:";
3591
3592     oc = avformat_alloc_context();
3593     if (!oc) {
3594         print_error(filename, AVERROR(ENOMEM));
3595         exit_program(1);
3596     }
3597
3598     if (o->format) {
3599         file_oformat = av_guess_format(o->format, NULL, NULL);
3600         if (!file_oformat) {
3601             av_log(NULL, AV_LOG_FATAL, "Requested output format '%s' is not a suitable output format\n", o->format);
3602             exit_program(1);
3603         }
3604     } else {
3605         file_oformat = av_guess_format(NULL, filename, NULL);
3606         if (!file_oformat) {
3607             av_log(NULL, AV_LOG_FATAL, "Unable to find a suitable output format for '%s'\n",
3608                    filename);
3609             exit_program(1);
3610         }
3611     }
3612
3613     oc->oformat = file_oformat;
3614     oc->interrupt_callback = int_cb;
3615     av_strlcpy(oc->filename, filename, sizeof(oc->filename));
3616
3617     if (!o->nb_stream_maps) {
3618         /* pick the "best" stream of each type */
3619 #define NEW_STREAM(type, index)\
3620         if (index >= 0) {\
3621             ost = new_ ## type ## _stream(o, oc);\
3622             ost->source_index = index;\
3623             ost->sync_ist     = &input_streams[index];\
3624             input_streams[index].discard = 0;\
3625         }
3626
3627         /* video: highest resolution */
3628         if (!o->video_disable && oc->oformat->video_codec != CODEC_ID_NONE) {
3629             int area = 0, idx = -1;
3630             for (i = 0; i < nb_input_streams; i++) {
3631                 ist = &input_streams[i];
3632                 if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3633                     ist->st->codec->width * ist->st->codec->height > area) {
3634                     area = ist->st->codec->width * ist->st->codec->height;
3635                     idx = i;
3636                 }
3637             }
3638             NEW_STREAM(video, idx);
3639         }
3640
3641         /* audio: most channels */
3642         if (!o->audio_disable && oc->oformat->audio_codec != CODEC_ID_NONE) {
3643             int channels = 0, idx = -1;
3644             for (i = 0; i < nb_input_streams; i++) {
3645                 ist = &input_streams[i];
3646                 if (ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
3647                     ist->st->codec->channels > channels) {
3648                     channels = ist->st->codec->channels;
3649                     idx = i;
3650                 }
3651             }
3652             NEW_STREAM(audio, idx);
3653         }
3654
3655         /* subtitles: pick first */
3656         if (!o->subtitle_disable && oc->oformat->subtitle_codec != CODEC_ID_NONE) {
3657             for (i = 0; i < nb_input_streams; i++)
3658                 if (input_streams[i].st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3659                     NEW_STREAM(subtitle, i);
3660                     break;
3661                 }
3662         }
3663         /* do something with data? */
3664     } else {
3665         for (i = 0; i < o->nb_stream_maps; i++) {
3666             StreamMap *map = &o->stream_maps[i];
3667
3668             if (map->disabled)
3669                 continue;
3670
3671             ist = &input_streams[input_files[map->file_index].ist_index + map->stream_index];
3672             switch (ist->st->codec->codec_type) {
3673             case AVMEDIA_TYPE_VIDEO:    ost = new_video_stream(o, oc);    break;
3674             case AVMEDIA_TYPE_AUDIO:    ost = new_audio_stream(o, oc);    break;
3675             case AVMEDIA_TYPE_SUBTITLE: ost = new_subtitle_stream(o, oc); break;
3676             case AVMEDIA_TYPE_DATA:     ost = new_data_stream(o, oc);     break;
3677             case AVMEDIA_TYPE_ATTACHMENT: ost = new_attachment_stream(o, oc); break;
3678             default:
3679                 av_log(NULL, AV_LOG_FATAL, "Cannot map stream #%d:%d - unsupported type.\n",
3680                        map->file_index, map->stream_index);
3681                 exit_program(1);
3682             }
3683
3684             ost->source_index = input_files[map->file_index].ist_index + map->stream_index;
3685             ost->sync_ist = &input_streams[input_files[map->sync_file_index].ist_index +
3686                                            map->sync_stream_index];
3687             ist->discard = 0;
3688         }
3689     }
3690
3691     /* handle attached files */
3692     for (i = 0; i < o->nb_attachments; i++) {
3693         AVIOContext *pb;
3694         uint8_t *attachment;
3695         const char *p;
3696         int64_t len;
3697
3698         if ((err = avio_open2(&pb, o->attachments[i], AVIO_FLAG_READ, &int_cb, NULL)) < 0) {
3699             av_log(NULL, AV_LOG_FATAL, "Could not open attachment file %s.\n",