pthreads: Generic progress lubrication support.
[ffmpeg.git] / ffmpeg.c
1 /*
2  * Copyright (c) 2000-2003 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 /**
22  * @file
23  * multimedia converter based on the FFmpeg libraries
24  */
25
26 #include "config.h"
27 #include <ctype.h>
28 #include <string.h>
29 #include <math.h>
30 #include <stdlib.h>
31 #include <errno.h>
32 #include <signal.h>
33 #include <limits.h>
34 #include <unistd.h>
35 #include "libavformat/avformat.h"
36 #include "libavdevice/avdevice.h"
37 #include "libswscale/swscale.h"
38 #include "libavutil/opt.h"
39 #include "libavcodec/audioconvert.h"
40 #include "libavutil/audioconvert.h"
41 #include "libavutil/parseutils.h"
42 #include "libavutil/samplefmt.h"
43 #include "libavutil/colorspace.h"
44 #include "libavutil/fifo.h"
45 #include "libavutil/intreadwrite.h"
46 #include "libavutil/dict.h"
47 #include "libavutil/mathematics.h"
48 #include "libavutil/pixdesc.h"
49 #include "libavutil/avstring.h"
50 #include "libavutil/libm.h"
51 #include "libavutil/imgutils.h"
52 #include "libavformat/os_support.h"
53 #include "libswresample/swresample.h"
54
55 #include "libavformat/ffm.h" // not public API
56
57 #if CONFIG_AVFILTER
58 # include "libavfilter/avcodec.h"
59 # include "libavfilter/avfilter.h"
60 # include "libavfilter/avfiltergraph.h"
61 # include "libavfilter/buffersink.h"
62 # include "libavfilter/buffersrc.h"
63 # include "libavfilter/vsrc_buffer.h"
64 #endif
65
66 #if HAVE_SYS_RESOURCE_H
67 #include <sys/types.h>
68 #include <sys/time.h>
69 #include <sys/resource.h>
70 #elif HAVE_GETPROCESSTIMES
71 #include <windows.h>
72 #endif
73 #if HAVE_GETPROCESSMEMORYINFO
74 #include <windows.h>
75 #include <psapi.h>
76 #endif
77
78 #if HAVE_SYS_SELECT_H
79 #include <sys/select.h>
80 #endif
81
82 #if HAVE_TERMIOS_H
83 #include <fcntl.h>
84 #include <sys/ioctl.h>
85 #include <sys/time.h>
86 #include <termios.h>
87 #elif HAVE_KBHIT
88 #include <conio.h>
89 #endif
90 #include <time.h>
91
92 #include "cmdutils.h"
93
94 #include "libavutil/avassert.h"
95
96 #define VSYNC_AUTO       -1
97 #define VSYNC_PASSTHROUGH 0
98 #define VSYNC_CFR         1
99 #define VSYNC_VFR         2
100
101 const char program_name[] = "ffmpeg";
102 const int program_birth_year = 2000;
103
104 /* select an input stream for an output stream */
105 typedef struct StreamMap {
106     int disabled;           /** 1 is this mapping is disabled by a negative map */
107     int file_index;
108     int stream_index;
109     int sync_file_index;
110     int sync_stream_index;
111 } StreamMap;
112
113 typedef struct {
114     int  file_idx,  stream_idx,  channel_idx; // input
115     int ofile_idx, ostream_idx;               // output
116 } AudioChannelMap;
117
118 /**
119  * select an input file for an output file
120  */
121 typedef struct MetadataMap {
122     int  file;      ///< file index
123     char type;      ///< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
124     int  index;     ///< stream/chapter/program number
125 } MetadataMap;
126
127 static const OptionDef options[];
128
129 #define MAX_STREAMS 1024    /* arbitrary sanity check value */
130
131 static int frame_bits_per_raw_sample = 0;
132 static int video_discard = 0;
133 static int same_quant = 0;
134 static int do_deinterlace = 0;
135 static int intra_dc_precision = 8;
136 static int loop_input = 0;
137 static int loop_output = AVFMT_NOOUTPUTLOOP;
138 static int qp_hist = 0;
139 static int intra_only = 0;
140 static const char *video_codec_name    = NULL;
141 static const char *audio_codec_name    = NULL;
142 static const char *subtitle_codec_name = NULL;
143
144 static int file_overwrite = 0;
145 static int no_file_overwrite = 0;
146 static int do_benchmark = 0;
147 static int do_hex_dump = 0;
148 static int do_pkt_dump = 0;
149 static int do_psnr = 0;
150 static int do_pass = 0;
151 static const char *pass_logfilename_prefix;
152 static int video_sync_method = VSYNC_AUTO;
153 static int audio_sync_method = 0;
154 static float audio_drift_threshold = 0.1;
155 static int copy_ts = 0;
156 static int copy_tb = -1;
157 static int opt_shortest = 0;
158 static char *vstats_filename;
159 static FILE *vstats_file;
160
161 static int audio_volume = 256;
162
163 static int exit_on_error = 0;
164 static int using_stdin = 0;
165 static int run_as_daemon  = 0;
166 static volatile int received_nb_signals = 0;
167 static int64_t video_size = 0;
168 static int64_t audio_size = 0;
169 static int64_t extra_size = 0;
170 static int nb_frames_dup = 0;
171 static int nb_frames_drop = 0;
172 static int input_sync;
173
174 static float dts_delta_threshold = 10;
175
176 static int print_stats = 1;
177
178 static uint8_t *audio_buf;
179 static unsigned int allocated_audio_buf_size;
180
181 static uint8_t *input_tmp= NULL;
182
183 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
184
185 typedef struct FrameBuffer {
186     uint8_t *base[4];
187     uint8_t *data[4];
188     int  linesize[4];
189
190     int h, w;
191     enum PixelFormat pix_fmt;
192
193     int refcount;
194     struct InputStream *ist;
195     struct FrameBuffer *next;
196 } FrameBuffer;
197
198 typedef struct InputStream {
199     int file_index;
200     AVStream *st;
201     int discard;             /* true if stream data should be discarded */
202     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
203     AVCodec *dec;
204     AVFrame *decoded_frame;
205     AVFrame *filtered_frame;
206
207     int64_t       start;     /* time when read started */
208     int64_t       next_pts;  /* synthetic pts for cases where pkt.pts
209                                 is not defined */
210     int64_t       pts;       /* current pts */
211     double ts_scale;
212     int is_start;            /* is 1 at the start and after a discontinuity */
213     int showed_multi_packet_warning;
214     AVDictionary *opts;
215
216     /* a pool of free buffers for decoded data */
217     FrameBuffer *buffer_pool;
218     int dr1;
219 } InputStream;
220
221 typedef struct InputFile {
222     AVFormatContext *ctx;
223     int eof_reached;      /* true if eof reached */
224     int ist_index;        /* index of first stream in input_streams */
225     int buffer_size;      /* current total buffer size */
226     int64_t ts_offset;
227     int nb_streams;       /* number of stream that ffmpeg is aware of; may be different
228                              from ctx.nb_streams if new streams appear during av_read_frame() */
229     int rate_emu;
230 } InputFile;
231
232 typedef struct OutputStream {
233     int file_index;          /* file index */
234     int index;               /* stream index in the output file */
235     int source_index;        /* InputStream index */
236     AVStream *st;            /* stream in the output file */
237     int encoding_needed;     /* true if encoding needed for this stream */
238     int frame_number;
239     /* input pts and corresponding output pts
240        for A/V sync */
241     struct InputStream *sync_ist; /* input stream to sync against */
242     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
243     AVBitStreamFilterContext *bitstream_filters;
244     AVCodec *enc;
245     int64_t max_frames;
246     AVFrame *output_frame;
247
248     /* video only */
249     int video_resample;
250     AVFrame resample_frame;              /* temporary frame for image resampling */
251     struct SwsContext *img_resample_ctx; /* for image resampling */
252     int resample_height;
253     int resample_width;
254     int resample_pix_fmt;
255     AVRational frame_rate;
256     int force_fps;
257     int top_field_first;
258
259     float frame_aspect_ratio;
260
261     /* forced key frames */
262     int64_t *forced_kf_pts;
263     int forced_kf_count;
264     int forced_kf_index;
265
266     /* audio only */
267     int audio_resample;
268     int audio_channels_map[SWR_CH_MAX];  ///< list of the channels id to pick from the source stream
269     int audio_channels_mapped;           ///< number of channels in audio_channels_map
270     int resample_sample_fmt;
271     int resample_channels;
272     int resample_sample_rate;
273     float rematrix_volume;
274     AVFifoBuffer *fifo;     /* for compression: one audio fifo per codec */
275     FILE *logfile;
276
277     struct SwrContext *swr;
278
279 #if CONFIG_AVFILTER
280     AVFilterContext *output_video_filter;
281     AVFilterContext *input_video_filter;
282     AVFilterBufferRef *picref;
283     char *avfilter;
284     AVFilterGraph *graph;
285 #endif
286
287     int64_t sws_flags;
288     AVDictionary *opts;
289     int is_past_recording_time;
290     int stream_copy;
291     const char *attachment_filename;
292     int copy_initial_nonkeyframes;
293 } OutputStream;
294
295
296 #if HAVE_TERMIOS_H
297
298 /* init terminal so that we can grab keys */
299 static struct termios oldtty;
300 static int restore_tty;
301 #endif
302
303 typedef struct OutputFile {
304     AVFormatContext *ctx;
305     AVDictionary *opts;
306     int ost_index;       /* index of the first stream in output_streams */
307     int64_t recording_time; /* desired length of the resulting file in microseconds */
308     int64_t start_time;     /* start time in microseconds */
309     uint64_t limit_filesize;
310 } OutputFile;
311
312 static InputStream *input_streams   = NULL;
313 static int         nb_input_streams = 0;
314 static InputFile   *input_files     = NULL;
315 static int         nb_input_files   = 0;
316
317 static OutputStream *output_streams = NULL;
318 static int        nb_output_streams = 0;
319 static OutputFile   *output_files   = NULL;
320 static int        nb_output_files   = 0;
321
322 typedef struct OptionsContext {
323     /* input/output options */
324     int64_t start_time;
325     const char *format;
326
327     SpecifierOpt *codec_names;
328     int        nb_codec_names;
329     SpecifierOpt *audio_channels;
330     int        nb_audio_channels;
331     SpecifierOpt *audio_sample_rate;
332     int        nb_audio_sample_rate;
333     SpecifierOpt *rematrix_volume;
334     int        nb_rematrix_volume;
335     SpecifierOpt *frame_rates;
336     int        nb_frame_rates;
337     SpecifierOpt *frame_sizes;
338     int        nb_frame_sizes;
339     SpecifierOpt *frame_pix_fmts;
340     int        nb_frame_pix_fmts;
341
342     /* input options */
343     int64_t input_ts_offset;
344     int rate_emu;
345
346     SpecifierOpt *ts_scale;
347     int        nb_ts_scale;
348     SpecifierOpt *dump_attachment;
349     int        nb_dump_attachment;
350
351     /* output options */
352     StreamMap *stream_maps;
353     int     nb_stream_maps;
354     AudioChannelMap *audio_channel_maps; ///< one info entry per -map_channel
355     int           nb_audio_channel_maps; ///< number of (valid) -map_channel settings
356     /* first item specifies output metadata, second is input */
357     MetadataMap (*meta_data_maps)[2];
358     int nb_meta_data_maps;
359     int metadata_global_manual;
360     int metadata_streams_manual;
361     int metadata_chapters_manual;
362     const char **attachments;
363     int       nb_attachments;
364
365     int chapters_input_file;
366
367     int64_t recording_time;
368     uint64_t limit_filesize;
369     float mux_preload;
370     float mux_max_delay;
371
372     int video_disable;
373     int audio_disable;
374     int subtitle_disable;
375     int data_disable;
376
377     /* indexed by output file stream index */
378     int   *streamid_map;
379     int nb_streamid_map;
380
381     SpecifierOpt *metadata;
382     int        nb_metadata;
383     SpecifierOpt *max_frames;
384     int        nb_max_frames;
385     SpecifierOpt *bitstream_filters;
386     int        nb_bitstream_filters;
387     SpecifierOpt *codec_tags;
388     int        nb_codec_tags;
389     SpecifierOpt *sample_fmts;
390     int        nb_sample_fmts;
391     SpecifierOpt *qscale;
392     int        nb_qscale;
393     SpecifierOpt *forced_key_frames;
394     int        nb_forced_key_frames;
395     SpecifierOpt *force_fps;
396     int        nb_force_fps;
397     SpecifierOpt *frame_aspect_ratios;
398     int        nb_frame_aspect_ratios;
399     SpecifierOpt *rc_overrides;
400     int        nb_rc_overrides;
401     SpecifierOpt *intra_matrices;
402     int        nb_intra_matrices;
403     SpecifierOpt *inter_matrices;
404     int        nb_inter_matrices;
405     SpecifierOpt *top_field_first;
406     int        nb_top_field_first;
407     SpecifierOpt *metadata_map;
408     int        nb_metadata_map;
409     SpecifierOpt *presets;
410     int        nb_presets;
411     SpecifierOpt *copy_initial_nonkeyframes;
412     int        nb_copy_initial_nonkeyframes;
413 #if CONFIG_AVFILTER
414     SpecifierOpt *filters;
415     int        nb_filters;
416 #endif
417 } OptionsContext;
418
419 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
420 {\
421     int i, ret;\
422     for (i = 0; i < o->nb_ ## name; i++) {\
423         char *spec = o->name[i].specifier;\
424         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
425             outvar = o->name[i].u.type;\
426         else if (ret < 0)\
427             exit_program(1);\
428     }\
429 }
430
431 static void reset_options(OptionsContext *o, int is_input)
432 {
433     const OptionDef *po = options;
434     OptionsContext bak= *o;
435
436     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
437     while (po->name) {
438         void *dst = (uint8_t*)o + po->u.off;
439
440         if (po->flags & OPT_SPEC) {
441             SpecifierOpt **so = dst;
442             int i, *count = (int*)(so + 1);
443             for (i = 0; i < *count; i++) {
444                 av_freep(&(*so)[i].specifier);
445                 if (po->flags & OPT_STRING)
446                     av_freep(&(*so)[i].u.str);
447             }
448             av_freep(so);
449             *count = 0;
450         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
451             av_freep(dst);
452         po++;
453     }
454
455     av_freep(&o->stream_maps);
456     av_freep(&o->audio_channel_maps);
457     av_freep(&o->meta_data_maps);
458     av_freep(&o->streamid_map);
459
460     memset(o, 0, sizeof(*o));
461
462     if(is_input) o->recording_time = bak.recording_time;
463     else         o->recording_time = INT64_MAX;
464     o->mux_max_delay  = 0.7;
465     o->limit_filesize = UINT64_MAX;
466     o->chapters_input_file = INT_MAX;
467
468     uninit_opts();
469     init_opts();
470 }
471
472 static int alloc_buffer(InputStream *ist, FrameBuffer **pbuf)
473 {
474     AVCodecContext *s = ist->st->codec;
475     FrameBuffer  *buf = av_mallocz(sizeof(*buf));
476     int ret, i;
477     const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
478     int h_chroma_shift, v_chroma_shift;
479     int edge = 32; // XXX should be avcodec_get_edge_width(), but that fails on svq1
480     int w = s->width, h = s->height;
481
482     if (!buf)
483         return AVERROR(ENOMEM);
484
485     if (!(s->flags & CODEC_FLAG_EMU_EDGE)) {
486         w += 2*edge;
487         h += 2*edge;
488     }
489
490     avcodec_align_dimensions(s, &w, &h);
491     if ((ret = av_image_alloc(buf->base, buf->linesize, w, h,
492                               s->pix_fmt, 32)) < 0) {
493         av_freep(&buf);
494         return ret;
495     }
496     /* XXX this shouldn't be needed, but some tests break without this line
497      * those decoders are buggy and need to be fixed.
498      * the following tests fail:
499      * bethsoft-vid, cdgraphics, ansi, aasc, fraps-v1, qtrle-1bit
500      */
501     memset(buf->base[0], 128, ret);
502
503     avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
504     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
505         const int h_shift = i==0 ? 0 : h_chroma_shift;
506         const int v_shift = i==0 ? 0 : v_chroma_shift;
507         if (s->flags & CODEC_FLAG_EMU_EDGE)
508             buf->data[i] = buf->base[i];
509         else
510             buf->data[i] = buf->base[i] +
511                            FFALIGN((buf->linesize[i]*edge >> v_shift) +
512                                    (pixel_size*edge >> h_shift), 32);
513     }
514     buf->w       = s->width;
515     buf->h       = s->height;
516     buf->pix_fmt = s->pix_fmt;
517     buf->ist     = ist;
518
519     *pbuf = buf;
520     return 0;
521 }
522
523 static void free_buffer_pool(InputStream *ist)
524 {
525     FrameBuffer *buf = ist->buffer_pool;
526     while (buf) {
527         ist->buffer_pool = buf->next;
528         av_freep(&buf->base[0]);
529         av_free(buf);
530         buf = ist->buffer_pool;
531     }
532 }
533
534 static void unref_buffer(InputStream *ist, FrameBuffer *buf)
535 {
536     av_assert0(buf->refcount);
537     buf->refcount--;
538     if (!buf->refcount) {
539         buf->next = ist->buffer_pool;
540         ist->buffer_pool = buf;
541     }
542 }
543
544 static int codec_get_buffer(AVCodecContext *s, AVFrame *frame)
545 {
546     InputStream *ist = s->opaque;
547     FrameBuffer *buf;
548     int ret, i;
549
550     if (!ist->buffer_pool && (ret = alloc_buffer(ist, &ist->buffer_pool)) < 0)
551         return ret;
552
553     buf              = ist->buffer_pool;
554     ist->buffer_pool = buf->next;
555     buf->next        = NULL;
556     if (buf->w != s->width || buf->h != s->height || buf->pix_fmt != s->pix_fmt) {
557         av_freep(&buf->base[0]);
558         av_free(buf);
559         ist->dr1 = 0;
560         if ((ret = alloc_buffer(ist, &buf)) < 0)
561             return ret;
562     }
563     buf->refcount++;
564
565     frame->opaque        = buf;
566     frame->type          = FF_BUFFER_TYPE_USER;
567     frame->extended_data = frame->data;
568     frame->pkt_pts       = s->pkt ? s->pkt->pts : AV_NOPTS_VALUE;
569
570     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
571         frame->base[i]     = buf->base[i];  // XXX h264.c uses base though it shouldn't
572         frame->data[i]     = buf->data[i];
573         frame->linesize[i] = buf->linesize[i];
574     }
575
576     return 0;
577 }
578
579 static void codec_release_buffer(AVCodecContext *s, AVFrame *frame)
580 {
581     InputStream *ist = s->opaque;
582     FrameBuffer *buf = frame->opaque;
583     int i;
584
585     if(frame->type!=FF_BUFFER_TYPE_USER)
586         return avcodec_default_release_buffer(s, frame);
587
588     for (i = 0; i < FF_ARRAY_ELEMS(frame->data); i++)
589         frame->data[i] = NULL;
590
591     unref_buffer(ist, buf);
592 }
593
594 static void filter_release_buffer(AVFilterBuffer *fb)
595 {
596     FrameBuffer *buf = fb->priv;
597     av_free(fb);
598     unref_buffer(buf->ist, buf);
599 }
600
601 #if CONFIG_AVFILTER
602
603 static int configure_video_filters(InputStream *ist, OutputStream *ost)
604 {
605     AVFilterContext *last_filter, *filter;
606     /** filter graph containing all filters including input & output */
607     AVCodecContext *codec = ost->st->codec;
608     AVCodecContext *icodec = ist->st->codec;
609     enum PixelFormat pix_fmts[] = { codec->pix_fmt, PIX_FMT_NONE };
610     AVBufferSinkParams *buffersink_params = av_buffersink_params_alloc();
611     AVRational sample_aspect_ratio;
612     char args[255];
613     int ret;
614
615     ost->graph = avfilter_graph_alloc();
616
617     if (ist->st->sample_aspect_ratio.num) {
618         sample_aspect_ratio = ist->st->sample_aspect_ratio;
619     } else
620         sample_aspect_ratio = ist->st->codec->sample_aspect_ratio;
621
622     snprintf(args, 255, "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
623              ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
624              sample_aspect_ratio.num, sample_aspect_ratio.den);
625
626     ret = avfilter_graph_create_filter(&ost->input_video_filter, avfilter_get_by_name("buffer"),
627                                        "src", args, NULL, ost->graph);
628     if (ret < 0)
629         return ret;
630 #if FF_API_OLD_VSINK_API
631     ret = avfilter_graph_create_filter(&ost->output_video_filter, avfilter_get_by_name("buffersink"),
632                                        "out", NULL, pix_fmts, ost->graph);
633 #else
634     buffersink_params->pixel_fmts = pix_fmts;
635     ret = avfilter_graph_create_filter(&ost->output_video_filter, avfilter_get_by_name("buffersink"),
636                                        "out", NULL, buffersink_params, ost->graph);
637 #endif
638     av_freep(&buffersink_params);
639     if (ret < 0)
640         return ret;
641     last_filter = ost->input_video_filter;
642
643     if (codec->width != icodec->width || codec->height != icodec->height) {
644         snprintf(args, 255, "%d:%d:flags=0x%X",
645                  codec->width,
646                  codec->height,
647                  (unsigned)ost->sws_flags);
648         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
649                                                 NULL, args, NULL, ost->graph)) < 0)
650             return ret;
651         if ((ret = avfilter_link(last_filter, 0, filter, 0)) < 0)
652             return ret;
653         last_filter = filter;
654     }
655
656     snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
657     ost->graph->scale_sws_opts = av_strdup(args);
658
659     if (ost->avfilter) {
660         AVFilterInOut *outputs = avfilter_inout_alloc();
661         AVFilterInOut *inputs  = avfilter_inout_alloc();
662
663         outputs->name    = av_strdup("in");
664         outputs->filter_ctx = last_filter;
665         outputs->pad_idx = 0;
666         outputs->next    = NULL;
667
668         inputs->name    = av_strdup("out");
669         inputs->filter_ctx = ost->output_video_filter;
670         inputs->pad_idx = 0;
671         inputs->next    = NULL;
672
673         if ((ret = avfilter_graph_parse(ost->graph, ost->avfilter, &inputs, &outputs, NULL)) < 0)
674             return ret;
675         av_freep(&ost->avfilter);
676     } else {
677         if ((ret = avfilter_link(last_filter, 0, ost->output_video_filter, 0)) < 0)
678             return ret;
679     }
680
681     if ((ret = avfilter_graph_config(ost->graph, NULL)) < 0)
682         return ret;
683
684     codec->width  = ost->output_video_filter->inputs[0]->w;
685     codec->height = ost->output_video_filter->inputs[0]->h;
686     codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
687         ost->frame_aspect_ratio ? // overridden by the -aspect cli option
688         av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
689         ost->output_video_filter->inputs[0]->sample_aspect_ratio;
690
691     return 0;
692 }
693 #endif /* CONFIG_AVFILTER */
694
695 static void term_exit(void)
696 {
697     av_log(NULL, AV_LOG_QUIET, "%s", "");
698 #if HAVE_TERMIOS_H
699     if(restore_tty)
700         tcsetattr (0, TCSANOW, &oldtty);
701 #endif
702 }
703
704 static volatile int received_sigterm = 0;
705
706 static void sigterm_handler(int sig)
707 {
708     received_sigterm = sig;
709     received_nb_signals++;
710     term_exit();
711     if(received_nb_signals > 3)
712         exit(123);
713 }
714
715 static void term_init(void)
716 {
717 #if HAVE_TERMIOS_H
718     if(!run_as_daemon){
719     struct termios tty;
720
721     if (tcgetattr (0, &tty) == 0) {
722     oldtty = tty;
723     restore_tty = 1;
724     atexit(term_exit);
725
726     tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
727                           |INLCR|IGNCR|ICRNL|IXON);
728     tty.c_oflag |= OPOST;
729     tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
730     tty.c_cflag &= ~(CSIZE|PARENB);
731     tty.c_cflag |= CS8;
732     tty.c_cc[VMIN] = 1;
733     tty.c_cc[VTIME] = 0;
734
735     tcsetattr (0, TCSANOW, &tty);
736     }
737     signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
738     }
739 #endif
740     avformat_network_deinit();
741
742     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
743     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
744 #ifdef SIGXCPU
745     signal(SIGXCPU, sigterm_handler);
746 #endif
747 }
748
749 /* read a key without blocking */
750 static int read_key(void)
751 {
752     unsigned char ch;
753 #if HAVE_TERMIOS_H
754     int n = 1;
755     struct timeval tv;
756     fd_set rfds;
757
758     FD_ZERO(&rfds);
759     FD_SET(0, &rfds);
760     tv.tv_sec = 0;
761     tv.tv_usec = 0;
762     n = select(1, &rfds, NULL, NULL, &tv);
763     if (n > 0) {
764         n = read(0, &ch, 1);
765         if (n == 1)
766             return ch;
767
768         return n;
769     }
770 #elif HAVE_KBHIT
771 #    if HAVE_PEEKNAMEDPIPE
772     static int is_pipe;
773     static HANDLE input_handle;
774     DWORD dw, nchars;
775     if(!input_handle){
776         input_handle = GetStdHandle(STD_INPUT_HANDLE);
777         is_pipe = !GetConsoleMode(input_handle, &dw);
778     }
779
780     if (stdin->_cnt > 0) {
781         read(0, &ch, 1);
782         return ch;
783     }
784     if (is_pipe) {
785         /* When running under a GUI, you will end here. */
786         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL))
787             return -1;
788         //Read it
789         if(nchars != 0) {
790             read(0, &ch, 1);
791             return ch;
792         }else{
793             return -1;
794         }
795     }
796 #    endif
797     if(kbhit())
798         return(getch());
799 #endif
800     return -1;
801 }
802
803 static int decode_interrupt_cb(void *ctx)
804 {
805     return received_nb_signals > 1;
806 }
807
808 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
809
810 void av_noreturn exit_program(int ret)
811 {
812     int i;
813
814     /* close files */
815     for (i = 0; i < nb_output_files; i++) {
816         AVFormatContext *s = output_files[i].ctx;
817         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
818             avio_close(s->pb);
819         avformat_free_context(s);
820         av_dict_free(&output_files[i].opts);
821     }
822     for (i = 0; i < nb_output_streams; i++) {
823         AVBitStreamFilterContext *bsfc = output_streams[i].bitstream_filters;
824         while (bsfc) {
825             AVBitStreamFilterContext *next = bsfc->next;
826             av_bitstream_filter_close(bsfc);
827             bsfc = next;
828         }
829         output_streams[i].bitstream_filters = NULL;
830
831         if (output_streams[i].output_frame) {
832             AVFrame *frame = output_streams[i].output_frame;
833             if (frame->extended_data != frame->data)
834                 av_freep(&frame->extended_data);
835             av_freep(&frame);
836         }
837     }
838     for (i = 0; i < nb_input_files; i++) {
839         avformat_close_input(&input_files[i].ctx);
840     }
841     for (i = 0; i < nb_input_streams; i++) {
842         av_freep(&input_streams[i].decoded_frame);
843         av_freep(&input_streams[i].filtered_frame);
844         av_dict_free(&input_streams[i].opts);
845         free_buffer_pool(&input_streams[i]);
846     }
847
848     if (vstats_file)
849         fclose(vstats_file);
850     av_free(vstats_filename);
851
852     av_freep(&input_streams);
853     av_freep(&input_files);
854     av_freep(&output_streams);
855     av_freep(&output_files);
856
857     uninit_opts();
858     av_free(audio_buf);
859     allocated_audio_buf_size = 0;
860
861 #if CONFIG_AVFILTER
862     avfilter_uninit();
863 #endif
864     avformat_network_deinit();
865
866     av_freep(&input_tmp);
867
868     if (received_sigterm) {
869         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
870                (int) received_sigterm);
871         exit (255);
872     }
873
874     exit(ret); /* not all OS-es handle main() return value */
875 }
876
877 static void assert_avoptions(AVDictionary *m)
878 {
879     AVDictionaryEntry *t;
880     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
881         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
882         exit_program(1);
883     }
884 }
885
886 static void assert_codec_experimental(AVCodecContext *c, int encoder)
887 {
888     const char *codec_string = encoder ? "encoder" : "decoder";
889     AVCodec *codec;
890     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
891         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
892         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
893                 "results.\nAdd '-strict experimental' if you want to use it.\n",
894                 codec_string, c->codec->name);
895         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
896         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
897             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
898                    codec_string, codec->name);
899         exit_program(1);
900     }
901 }
902
903 static void choose_sample_fmt(AVStream *st, AVCodec *codec)
904 {
905     if (codec && codec->sample_fmts) {
906         const enum AVSampleFormat *p = codec->sample_fmts;
907         for (; *p != -1; p++) {
908             if (*p == st->codec->sample_fmt)
909                 break;
910         }
911         if (*p == -1) {
912             if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
913                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
914             if(av_get_sample_fmt_name(st->codec->sample_fmt))
915             av_log(NULL, AV_LOG_WARNING,
916                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
917                    av_get_sample_fmt_name(st->codec->sample_fmt),
918                    codec->name,
919                    av_get_sample_fmt_name(codec->sample_fmts[0]));
920             st->codec->sample_fmt = codec->sample_fmts[0];
921         }
922     }
923 }
924
925 static void choose_sample_rate(AVStream *st, AVCodec *codec)
926 {
927     if (codec && codec->supported_samplerates) {
928         const int *p  = codec->supported_samplerates;
929         int best      = 0;
930         int best_dist = INT_MAX;
931         for (; *p; p++) {
932             int dist = abs(st->codec->sample_rate - *p);
933             if (dist < best_dist) {
934                 best_dist = dist;
935                 best      = *p;
936             }
937         }
938         if (best_dist) {
939             av_log(st->codec, AV_LOG_WARNING, "Requested sampling rate unsupported using closest supported (%d)\n", best);
940         }
941         st->codec->sample_rate = best;
942     }
943 }
944
945 static void choose_pixel_fmt(AVStream *st, AVCodec *codec)
946 {
947     if (codec && codec->pix_fmts) {
948         const enum PixelFormat *p = codec->pix_fmts;
949         int has_alpha= av_pix_fmt_descriptors[st->codec->pix_fmt].nb_components % 2 == 0;
950         enum PixelFormat best= PIX_FMT_NONE;
951         if (st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
952             if (st->codec->codec_id == CODEC_ID_MJPEG) {
953                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
954             } else if (st->codec->codec_id == CODEC_ID_LJPEG) {
955                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
956                                                  PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
957             }
958         }
959         for (; *p != PIX_FMT_NONE; p++) {
960             best= avcodec_find_best_pix_fmt2(best, *p, st->codec->pix_fmt, has_alpha, NULL);
961             if (*p == st->codec->pix_fmt)
962                 break;
963         }
964         if (*p == PIX_FMT_NONE) {
965             if (st->codec->pix_fmt != PIX_FMT_NONE)
966                 av_log(NULL, AV_LOG_WARNING,
967                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
968                        av_pix_fmt_descriptors[st->codec->pix_fmt].name,
969                        codec->name,
970                        av_pix_fmt_descriptors[best].name);
971             st->codec->pix_fmt = best;
972         }
973     }
974 }
975
976 static double get_sync_ipts(const OutputStream *ost)
977 {
978     const InputStream *ist = ost->sync_ist;
979     OutputFile *of = &output_files[ost->file_index];
980     return (double)(ist->pts - of->start_time) / AV_TIME_BASE;
981 }
982
983 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
984 {
985     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
986     AVCodecContext          *avctx = ost->st->codec;
987     int ret;
988
989     /*
990      * Audio encoders may split the packets --  #frames in != #packets out.
991      * But there is no reordering, so we can limit the number of output packets
992      * by simply dropping them here.
993      * Counting encoded video frames needs to be done separately because of
994      * reordering, see do_video_out()
995      */
996     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
997         if (ost->frame_number >= ost->max_frames)
998             return;
999         ost->frame_number++;
1000     }
1001
1002     while (bsfc) {
1003         AVPacket new_pkt = *pkt;
1004         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1005                                            &new_pkt.data, &new_pkt.size,
1006                                            pkt->data, pkt->size,
1007                                            pkt->flags & AV_PKT_FLAG_KEY);
1008         if (a > 0) {
1009             av_free_packet(pkt);
1010             new_pkt.destruct = av_destruct_packet;
1011         } else if (a < 0) {
1012             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
1013                    bsfc->filter->name, pkt->stream_index,
1014                    avctx->codec ? avctx->codec->name : "copy");
1015             print_error("", a);
1016             if (exit_on_error)
1017                 exit_program(1);
1018         }
1019         *pkt = new_pkt;
1020
1021         bsfc = bsfc->next;
1022     }
1023
1024     ret = av_interleaved_write_frame(s, pkt);
1025     if (ret < 0) {
1026         print_error("av_interleaved_write_frame()", ret);
1027         exit_program(1);
1028     }
1029 }
1030
1031 static void generate_silence(uint8_t* buf, enum AVSampleFormat sample_fmt, size_t size)
1032 {
1033     int fill_char = 0x00;
1034     if (sample_fmt == AV_SAMPLE_FMT_U8)
1035         fill_char = 0x80;
1036     memset(buf, fill_char, size);
1037 }
1038
1039 static int encode_audio_frame(AVFormatContext *s, OutputStream *ost,
1040                               const uint8_t *buf, int buf_size)
1041 {
1042     AVCodecContext *enc = ost->st->codec;
1043     AVFrame *frame = NULL;
1044     AVPacket pkt;
1045     int ret, got_packet;
1046
1047     av_init_packet(&pkt);
1048     pkt.data = NULL;
1049     pkt.size = 0;
1050
1051     if (buf) {
1052         if (!ost->output_frame) {
1053             ost->output_frame = avcodec_alloc_frame();
1054             if (!ost->output_frame) {
1055                 av_log(NULL, AV_LOG_FATAL, "out-of-memory in encode_audio_frame()\n");
1056                 exit_program(1);
1057             }
1058         }
1059         frame = ost->output_frame;
1060         if (frame->extended_data != frame->data)
1061             av_freep(&frame->extended_data);
1062         avcodec_get_frame_defaults(frame);
1063
1064         frame->nb_samples  = buf_size /
1065                              (enc->channels * av_get_bytes_per_sample(enc->sample_fmt));
1066         if ((ret = avcodec_fill_audio_frame(frame, enc->channels, enc->sample_fmt,
1067                                             buf, buf_size, 1)) < 0) {
1068             av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
1069             exit_program(1);
1070         }
1071     }
1072
1073     got_packet = 0;
1074     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1075         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
1076         exit_program(1);
1077     }
1078
1079     ret = pkt.size;
1080
1081     if (got_packet) {
1082         pkt.stream_index = ost->index;
1083         if (pkt.pts != AV_NOPTS_VALUE)
1084             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1085         if (pkt.duration > 0)
1086             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1087
1088         write_frame(s, &pkt, ost);
1089
1090         audio_size += pkt.size;
1091
1092         av_free_packet(&pkt);
1093     }
1094
1095     if (frame)
1096         ost->sync_opts += frame->nb_samples;
1097
1098     return ret;
1099 }
1100
1101 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1102                          InputStream *ist, AVFrame *decoded_frame)
1103 {
1104     uint8_t *buftmp;
1105     int64_t audio_buf_size, size_out;
1106
1107     int frame_bytes, resample_changed;
1108     AVCodecContext *enc = ost->st->codec;
1109     AVCodecContext *dec = ist->st->codec;
1110     int osize = av_get_bytes_per_sample(enc->sample_fmt);
1111     int isize = av_get_bytes_per_sample(dec->sample_fmt);
1112     uint8_t *buf = decoded_frame->data[0];
1113     int size     = decoded_frame->nb_samples * dec->channels * isize;
1114     int64_t allocated_for_size = size;
1115
1116 need_realloc:
1117     audio_buf_size  = (allocated_for_size + isize * dec->channels - 1) / (isize * dec->channels);
1118     audio_buf_size  = (audio_buf_size * enc->sample_rate + dec->sample_rate) / dec->sample_rate;
1119     audio_buf_size  = audio_buf_size * 2 + 10000; // safety factors for the deprecated resampling API
1120     audio_buf_size  = FFMAX(audio_buf_size, enc->frame_size);
1121     audio_buf_size *= osize * enc->channels;
1122
1123     if (audio_buf_size > INT_MAX) {
1124         av_log(NULL, AV_LOG_FATAL, "Buffer sizes too large\n");
1125         exit_program(1);
1126     }
1127
1128     av_fast_malloc(&audio_buf, &allocated_audio_buf_size, audio_buf_size);
1129     if (!audio_buf) {
1130         av_log(NULL, AV_LOG_FATAL, "Out of memory in do_audio_out\n");
1131         exit_program(1);
1132     }
1133
1134     if (enc->channels != dec->channels
1135      || enc->sample_fmt != dec->sample_fmt
1136      || enc->sample_rate!= dec->sample_rate
1137     )
1138         ost->audio_resample = 1;
1139
1140     resample_changed = ost->resample_sample_fmt  != dec->sample_fmt ||
1141                        ost->resample_channels    != dec->channels   ||
1142                        ost->resample_sample_rate != dec->sample_rate;
1143
1144     if ((ost->audio_resample && !ost->swr) || resample_changed || ost->audio_channels_mapped) {
1145         if (resample_changed) {
1146             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",
1147                    ist->file_index, ist->st->index,
1148                    ost->resample_sample_rate, av_get_sample_fmt_name(ost->resample_sample_fmt), ost->resample_channels,
1149                    dec->sample_rate, av_get_sample_fmt_name(dec->sample_fmt), dec->channels);
1150             ost->resample_sample_fmt  = dec->sample_fmt;
1151             ost->resample_channels    = dec->channels;
1152             ost->resample_sample_rate = dec->sample_rate;
1153             swr_free(&ost->swr);
1154         }
1155         /* if audio_sync_method is >1 the resampler is needed for audio drift compensation */
1156         if (audio_sync_method <= 1 && !ost->audio_channels_mapped &&
1157             ost->resample_sample_fmt  == enc->sample_fmt &&
1158             ost->resample_channels    == enc->channels   &&
1159             ost->resample_sample_rate == enc->sample_rate) {
1160             //ost->swr = NULL;
1161             ost->audio_resample = 0;
1162         } else {
1163             ost->swr = swr_alloc_set_opts(ost->swr,
1164                                           enc->channel_layout, enc->sample_fmt, enc->sample_rate,
1165                                           dec->channel_layout, dec->sample_fmt, dec->sample_rate,
1166                                           0, NULL);
1167             if (ost->audio_channels_mapped)
1168                 swr_set_channel_mapping(ost->swr, ost->audio_channels_map);
1169             av_opt_set_double(ost->swr, "rmvol", ost->rematrix_volume, 0);
1170             if (ost->audio_channels_mapped) {
1171                 av_opt_set_int(ost->swr, "icl", av_get_default_channel_layout(ost->audio_channels_mapped), 0);
1172                 av_opt_set_int(ost->swr, "uch", ost->audio_channels_mapped, 0);
1173             }
1174             if (av_opt_set_int(ost->swr, "ich", dec->channels, 0) < 0) {
1175                 av_log(NULL, AV_LOG_FATAL, "Unsupported number of input channels\n");
1176                 exit_program(1);
1177             }
1178             if (av_opt_set_int(ost->swr, "och", enc->channels, 0) < 0) {
1179                 av_log(NULL, AV_LOG_FATAL, "Unsupported number of output channels\n");
1180                 exit_program(1);
1181             }
1182             if(audio_sync_method>1) av_opt_set_int(ost->swr, "flags", SWR_FLAG_RESAMPLE, 0);
1183             if(ost->swr && swr_init(ost->swr) < 0){
1184                 av_log(NULL, AV_LOG_FATAL, "swr_init() failed\n");
1185                 swr_free(&ost->swr);
1186             }
1187
1188             if (!ost->swr) {
1189                 av_log(NULL, AV_LOG_FATAL, "Can not resample %d channels @ %d Hz to %d channels @ %d Hz\n",
1190                         dec->channels, dec->sample_rate,
1191                         enc->channels, enc->sample_rate);
1192                 exit_program(1);
1193             }
1194         }
1195     }
1196
1197     av_assert0(ost->audio_resample || dec->sample_fmt==enc->sample_fmt);
1198
1199     if (audio_sync_method) {
1200         double delta = get_sync_ipts(ost) * enc->sample_rate - ost->sync_opts -
1201                        av_fifo_size(ost->fifo) / (enc->channels * osize);
1202         int idelta = delta * dec->sample_rate / enc->sample_rate;
1203         int byte_delta = idelta * isize * dec->channels;
1204
1205         // FIXME resample delay
1206         if (fabs(delta) > 50) {
1207             if (ist->is_start || fabs(delta) > audio_drift_threshold*enc->sample_rate) {
1208                 if (byte_delta < 0) {
1209                     byte_delta = FFMAX(byte_delta, -size);
1210                     size += byte_delta;
1211                     buf  -= byte_delta;
1212                     av_log(NULL, AV_LOG_VERBOSE, "discarding %d audio samples\n",
1213                            -byte_delta / (isize * dec->channels));
1214                     if (!size)
1215                         return;
1216                     ist->is_start = 0;
1217                 } else {
1218                     input_tmp = av_realloc(input_tmp, byte_delta + size);
1219
1220                     if (byte_delta > allocated_for_size - size) {
1221                         allocated_for_size = byte_delta + (int64_t)size;
1222                         goto need_realloc;
1223                     }
1224                     ist->is_start = 0;
1225
1226                     generate_silence(input_tmp, dec->sample_fmt, byte_delta);
1227                     memcpy(input_tmp + byte_delta, buf, size);
1228                     buf = input_tmp;
1229                     size += byte_delta;
1230                     av_log(NULL, AV_LOG_VERBOSE, "adding %d audio samples of silence\n", idelta);
1231                 }
1232             } else if (audio_sync_method > 1) {
1233                 int comp = av_clip(delta, -audio_sync_method, audio_sync_method);
1234                 av_assert0(ost->audio_resample);
1235                 av_log(NULL, AV_LOG_VERBOSE, "compensating audio timestamp drift:%f compensation:%d in:%d\n",
1236                        delta, comp, enc->sample_rate);
1237 //                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));
1238                 swr_set_compensation(ost->swr, comp, enc->sample_rate);
1239             }
1240         }
1241     } else
1242         ost->sync_opts = lrintf(get_sync_ipts(ost) * enc->sample_rate) -
1243                                 av_fifo_size(ost->fifo) / (enc->channels * osize); // FIXME wrong
1244
1245     if (ost->audio_resample) {
1246         buftmp = audio_buf;
1247         size_out = swr_convert(ost->swr, (      uint8_t*[]){buftmp}, audio_buf_size / (enc->channels * osize),
1248                                          (const uint8_t*[]){buf   }, size / (dec->channels * isize));
1249         size_out = size_out * enc->channels * osize;
1250     } else {
1251         buftmp = buf;
1252         size_out = size;
1253     }
1254
1255     av_assert0(ost->audio_resample || dec->sample_fmt==enc->sample_fmt);
1256
1257     /* now encode as many frames as possible */
1258     if (!(enc->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
1259         /* output resampled raw samples */
1260         if (av_fifo_realloc2(ost->fifo, av_fifo_size(ost->fifo) + size_out) < 0) {
1261             av_log(NULL, AV_LOG_FATAL, "av_fifo_realloc2() failed\n");
1262             exit_program(1);
1263         }
1264         av_fifo_generic_write(ost->fifo, buftmp, size_out, NULL);
1265
1266         frame_bytes = enc->frame_size * osize * enc->channels;
1267
1268         while (av_fifo_size(ost->fifo) >= frame_bytes) {
1269             av_fifo_generic_read(ost->fifo, audio_buf, frame_bytes, NULL);
1270             encode_audio_frame(s, ost, audio_buf, frame_bytes);
1271         }
1272     } else {
1273         encode_audio_frame(s, ost, buftmp, size_out);
1274     }
1275 }
1276
1277 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1278 {
1279     AVCodecContext *dec;
1280     AVPicture *picture2;
1281     AVPicture picture_tmp;
1282     uint8_t *buf = 0;
1283
1284     dec = ist->st->codec;
1285
1286     /* deinterlace : must be done before any resize */
1287     if (do_deinterlace) {
1288         int size;
1289
1290         /* create temporary picture */
1291         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1292         buf  = av_malloc(size);
1293         if (!buf)
1294             return;
1295
1296         picture2 = &picture_tmp;
1297         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1298
1299         if (avpicture_deinterlace(picture2, picture,
1300                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1301             /* if error, do not deinterlace */
1302             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1303             av_free(buf);
1304             buf = NULL;
1305             picture2 = picture;
1306         }
1307     } else {
1308         picture2 = picture;
1309     }
1310
1311     if (picture != picture2)
1312         *picture = *picture2;
1313     *bufp = buf;
1314 }
1315
1316 static void do_subtitle_out(AVFormatContext *s,
1317                             OutputStream *ost,
1318                             InputStream *ist,
1319                             AVSubtitle *sub,
1320                             int64_t pts)
1321 {
1322     static uint8_t *subtitle_out = NULL;
1323     int subtitle_out_max_size = 1024 * 1024;
1324     int subtitle_out_size, nb, i;
1325     AVCodecContext *enc;
1326     AVPacket pkt;
1327
1328     if (pts == AV_NOPTS_VALUE) {
1329         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1330         if (exit_on_error)
1331             exit_program(1);
1332         return;
1333     }
1334
1335     enc = ost->st->codec;
1336
1337     if (!subtitle_out) {
1338         subtitle_out = av_malloc(subtitle_out_max_size);
1339     }
1340
1341     /* Note: DVB subtitle need one packet to draw them and one other
1342        packet to clear them */
1343     /* XXX: signal it in the codec context ? */
1344     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1345         nb = 2;
1346     else
1347         nb = 1;
1348
1349     for (i = 0; i < nb; i++) {
1350         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1351         // start_display_time is required to be 0
1352         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1353         sub->end_display_time  -= sub->start_display_time;
1354         sub->start_display_time = 0;
1355         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1356                                                     subtitle_out_max_size, sub);
1357         if (subtitle_out_size < 0) {
1358             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1359             exit_program(1);
1360         }
1361
1362         av_init_packet(&pkt);
1363         pkt.stream_index = ost->index;
1364         pkt.data = subtitle_out;
1365         pkt.size = subtitle_out_size;
1366         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1367         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1368             /* XXX: the pts correction is handled here. Maybe handling
1369                it in the codec would be better */
1370             if (i == 0)
1371                 pkt.pts += 90 * sub->start_display_time;
1372             else
1373                 pkt.pts += 90 * sub->end_display_time;
1374         }
1375         write_frame(s, &pkt, ost);
1376     }
1377 }
1378
1379 static int bit_buffer_size = 1024 * 256;
1380 static uint8_t *bit_buffer = NULL;
1381
1382 static void do_video_resample(OutputStream *ost,
1383                               InputStream *ist,
1384                               AVFrame *in_picture,
1385                               AVFrame **out_picture)
1386 {
1387 #if CONFIG_AVFILTER
1388     *out_picture = in_picture;
1389 #else
1390     AVCodecContext *dec = ist->st->codec;
1391     AVCodecContext *enc = ost->st->codec;
1392     int resample_changed = ost->resample_width   != in_picture->width  ||
1393                            ost->resample_height  != in_picture->height ||
1394                            ost->resample_pix_fmt != in_picture->format;
1395
1396     *out_picture = in_picture;
1397     if (resample_changed) {
1398         av_log(NULL, AV_LOG_INFO,
1399                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s / frm size:%dx%d fmt:%s\n",
1400                ist->file_index, ist->st->index,
1401                ost->resample_width, ost->resample_height, av_get_pix_fmt_name(ost->resample_pix_fmt),
1402                dec->width         , dec->height         , av_get_pix_fmt_name(dec->pix_fmt),
1403                in_picture->width, in_picture->height, av_get_pix_fmt_name(in_picture->format));
1404         ost->resample_width   = in_picture->width;
1405         ost->resample_height  = in_picture->height;
1406         ost->resample_pix_fmt = in_picture->format;
1407     }
1408
1409     ost->video_resample = in_picture->width   != enc->width  ||
1410                           in_picture->height  != enc->height ||
1411                           in_picture->format  != enc->pix_fmt;
1412
1413     if (ost->video_resample) {
1414         *out_picture = &ost->resample_frame;
1415         if (!ost->img_resample_ctx || resample_changed) {
1416             /* initialize the destination picture */
1417             if (!ost->resample_frame.data[0]) {
1418                 avcodec_get_frame_defaults(&ost->resample_frame);
1419                 if (avpicture_alloc((AVPicture *)&ost->resample_frame, enc->pix_fmt,
1420                                     enc->width, enc->height)) {
1421                     av_log(NULL, AV_LOG_FATAL, "Cannot allocate temp picture, check pix fmt\n");
1422                     exit_program(1);
1423                 }
1424             }
1425             /* initialize a new scaler context */
1426             sws_freeContext(ost->img_resample_ctx);
1427             ost->img_resample_ctx = sws_getContext(in_picture->width, in_picture->height, in_picture->format,
1428                                                    enc->width, enc->height, enc->pix_fmt,
1429                                                    ost->sws_flags, NULL, NULL, NULL);
1430             if (ost->img_resample_ctx == NULL) {
1431                 av_log(NULL, AV_LOG_FATAL, "Cannot get resampling context\n");
1432                 exit_program(1);
1433             }
1434         }
1435         sws_scale(ost->img_resample_ctx, in_picture->data, in_picture->linesize,
1436               0, ost->resample_height, (*out_picture)->data, (*out_picture)->linesize);
1437     }
1438 #endif
1439 }
1440
1441
1442 static void do_video_out(AVFormatContext *s,
1443                          OutputStream *ost,
1444                          InputStream *ist,
1445                          AVFrame *in_picture,
1446                          int *frame_size, float quality)
1447 {
1448     int nb_frames, i, ret, format_video_sync;
1449     AVFrame *final_picture;
1450     AVCodecContext *enc;
1451     double sync_ipts;
1452     double duration = 0;
1453
1454     enc = ost->st->codec;
1455
1456     if (ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE) {
1457         duration = FFMAX(av_q2d(ist->st->time_base), av_q2d(ist->st->codec->time_base));
1458         if(ist->st->avg_frame_rate.num)
1459             duration= FFMAX(duration, 1/av_q2d(ist->st->avg_frame_rate));
1460
1461         duration /= av_q2d(enc->time_base);
1462     }
1463
1464     sync_ipts = get_sync_ipts(ost) / av_q2d(enc->time_base);
1465
1466     /* by default, we output a single frame */
1467     nb_frames = 1;
1468
1469     *frame_size = 0;
1470
1471     format_video_sync = video_sync_method;
1472     if (format_video_sync == VSYNC_AUTO)
1473         format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : 1;
1474
1475     if (format_video_sync != VSYNC_PASSTHROUGH) {
1476         double vdelta = sync_ipts - ost->sync_opts + duration;
1477         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
1478         if (vdelta < -1.1)
1479             nb_frames = 0;
1480         else if (format_video_sync == VSYNC_VFR) {
1481             if (vdelta <= -0.6) {
1482                 nb_frames = 0;
1483             } else if (vdelta > 0.6)
1484                 ost->sync_opts = lrintf(sync_ipts);
1485         } else if (vdelta > 1.1)
1486             nb_frames = lrintf(vdelta);
1487 //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);
1488         if (nb_frames == 0) {
1489             ++nb_frames_drop;
1490             av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1491         } else if (nb_frames > 1) {
1492             nb_frames_dup += nb_frames - 1;
1493             av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
1494         }
1495     } else
1496         ost->sync_opts = lrintf(sync_ipts);
1497
1498     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
1499     if (nb_frames <= 0)
1500         return;
1501
1502     do_video_resample(ost, ist, in_picture, &final_picture);
1503
1504     /* duplicates frame if needed */
1505     for (i = 0; i < nb_frames; i++) {
1506         AVPacket pkt;
1507         av_init_packet(&pkt);
1508         pkt.stream_index = ost->index;
1509
1510         if (s->oformat->flags & AVFMT_RAWPICTURE &&
1511             enc->codec->id == CODEC_ID_RAWVIDEO) {
1512             /* raw pictures are written as AVPicture structure to
1513                avoid any copies. We support temporarily the older
1514                method. */
1515             enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1516             enc->coded_frame->top_field_first  = in_picture->top_field_first;
1517             pkt.data   = (uint8_t *)final_picture;
1518             pkt.size   =  sizeof(AVPicture);
1519             pkt.pts    = av_rescale_q(ost->sync_opts, enc->time_base, ost->st->time_base);
1520             pkt.flags |= AV_PKT_FLAG_KEY;
1521
1522             write_frame(s, &pkt, ost);
1523         } else {
1524             AVFrame big_picture;
1525
1526             big_picture = *final_picture;
1527             /* better than nothing: use input picture interlaced
1528                settings */
1529             big_picture.interlaced_frame = in_picture->interlaced_frame;
1530             if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1531                 if (ost->top_field_first == -1)
1532                     big_picture.top_field_first = in_picture->top_field_first;
1533                 else
1534                     big_picture.top_field_first = !!ost->top_field_first;
1535             }
1536
1537             /* handles same_quant here. This is not correct because it may
1538                not be a global option */
1539             big_picture.quality = quality;
1540             if (!enc->me_threshold)
1541                 big_picture.pict_type = 0;
1542 //            big_picture.pts = AV_NOPTS_VALUE;
1543             big_picture.pts = ost->sync_opts;
1544 //            big_picture.pts= av_rescale(ost->sync_opts, AV_TIME_BASE*(int64_t)enc->time_base.num, enc->time_base.den);
1545 // av_log(NULL, AV_LOG_DEBUG, "%"PRId64" -> encoder\n", ost->sync_opts);
1546             if (ost->forced_kf_index < ost->forced_kf_count &&
1547                 big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1548                 big_picture.pict_type = AV_PICTURE_TYPE_I;
1549                 ost->forced_kf_index++;
1550             }
1551             ret = avcodec_encode_video(enc,
1552                                        bit_buffer, bit_buffer_size,
1553                                        &big_picture);
1554             if (ret < 0) {
1555                 av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1556                 exit_program(1);
1557             }
1558
1559             if (ret > 0) {
1560                 pkt.data = bit_buffer;
1561                 pkt.size = ret;
1562                 if (enc->coded_frame->pts != AV_NOPTS_VALUE)
1563                     pkt.pts = av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
1564 /*av_log(NULL, AV_LOG_DEBUG, "encoder -> %"PRId64"/%"PRId64"\n",
1565    pkt.pts != AV_NOPTS_VALUE ? av_rescale(pkt.pts, enc->time_base.den, AV_TIME_BASE*(int64_t)enc->time_base.num) : -1,
1566    pkt.dts != AV_NOPTS_VALUE ? av_rescale(pkt.dts, enc->time_base.den, AV_TIME_BASE*(int64_t)enc->time_base.num) : -1);*/
1567
1568                 if (enc->coded_frame->key_frame)
1569                     pkt.flags |= AV_PKT_FLAG_KEY;
1570                 write_frame(s, &pkt, ost);
1571                 *frame_size = ret;
1572                 video_size += ret;
1573                 // fprintf(stderr,"\nFrame: %3d size: %5d type: %d",
1574                 //         enc->frame_number-1, ret, enc->pict_type);
1575                 /* if two pass, output log */
1576                 if (ost->logfile && enc->stats_out) {
1577                     fprintf(ost->logfile, "%s", enc->stats_out);
1578                 }
1579             }
1580         }
1581         ost->sync_opts++;
1582         /*
1583          * For video, number of frames in == number of packets out.
1584          * But there may be reordering, so we can't throw away frames on encoder
1585          * flush, we need to limit them here, before they go into encoder.
1586          */
1587         ost->frame_number++;
1588     }
1589 }
1590
1591 static double psnr(double d)
1592 {
1593     return -10.0 * log(d) / log(10.0);
1594 }
1595
1596 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1597                            int frame_size)
1598 {
1599     AVCodecContext *enc;
1600     int frame_number;
1601     double ti1, bitrate, avg_bitrate;
1602
1603     /* this is executed just the first time do_video_stats is called */
1604     if (!vstats_file) {
1605         vstats_file = fopen(vstats_filename, "w");
1606         if (!vstats_file) {
1607             perror("fopen");
1608             exit_program(1);
1609         }
1610     }
1611
1612     enc = ost->st->codec;
1613     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1614         frame_number = ost->frame_number;
1615         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1616         if (enc->flags&CODEC_FLAG_PSNR)
1617             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1618
1619         fprintf(vstats_file,"f_size= %6d ", frame_size);
1620         /* compute pts value */
1621         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1622         if (ti1 < 0.01)
1623             ti1 = 0.01;
1624
1625         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1626         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1627         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1628                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1629         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1630     }
1631 }
1632
1633 static void print_report(OutputFile *output_files,
1634                          OutputStream *ost_table, int nb_ostreams,
1635                          int is_last_report, int64_t timer_start, int64_t cur_time)
1636 {
1637     char buf[1024];
1638     OutputStream *ost;
1639     AVFormatContext *oc;
1640     int64_t total_size;
1641     AVCodecContext *enc;
1642     int frame_number, vid, i;
1643     double bitrate;
1644     int64_t pts = INT64_MAX;
1645     static int64_t last_time = -1;
1646     static int qp_histogram[52];
1647     int hours, mins, secs, us;
1648
1649     if (!print_stats && !is_last_report)
1650         return;
1651
1652     if (!is_last_report) {
1653         if (last_time == -1) {
1654             last_time = cur_time;
1655             return;
1656         }
1657         if ((cur_time - last_time) < 500000)
1658             return;
1659         last_time = cur_time;
1660     }
1661
1662
1663     oc = output_files[0].ctx;
1664
1665     total_size = avio_size(oc->pb);
1666     if (total_size < 0) { // FIXME improve avio_size() so it works with non seekable output too
1667         total_size = avio_tell(oc->pb);
1668         if (total_size < 0)
1669             total_size = 0;
1670     }
1671
1672     buf[0] = '\0';
1673     vid = 0;
1674     for (i = 0; i < nb_ostreams; i++) {
1675         float q = -1;
1676         ost = &ost_table[i];
1677         enc = ost->st->codec;
1678         if (!ost->stream_copy && enc->coded_frame)
1679             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1680         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1681             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1682         }
1683         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1684             float t = (cur_time-timer_start) / 1000000.0;
1685
1686             frame_number = ost->frame_number;
1687             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
1688                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
1689             if (is_last_report)
1690                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1691             if (qp_hist) {
1692                 int j;
1693                 int qp = lrintf(q);
1694                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1695                     qp_histogram[qp]++;
1696                 for (j = 0; j < 32; j++)
1697                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
1698             }
1699             if (enc->flags&CODEC_FLAG_PSNR) {
1700                 int j;
1701                 double error, error_sum = 0;
1702                 double scale, scale_sum = 0;
1703                 char type[3] = { 'Y','U','V' };
1704                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1705                 for (j = 0; j < 3; j++) {
1706                     if (is_last_report) {
1707                         error = enc->error[j];
1708                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1709                     } else {
1710                         error = enc->coded_frame->error[j];
1711                         scale = enc->width * enc->height * 255.0 * 255.0;
1712                     }
1713                     if (j)
1714                         scale /= 4;
1715                     error_sum += error;
1716                     scale_sum += scale;
1717                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
1718                 }
1719                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1720             }
1721             vid = 1;
1722         }
1723         /* compute min output value */
1724         pts = FFMIN(pts, av_rescale_q(ost->st->pts.val,
1725                                       ost->st->time_base, AV_TIME_BASE_Q));
1726     }
1727
1728     secs = pts / AV_TIME_BASE;
1729     us = pts % AV_TIME_BASE;
1730     mins = secs / 60;
1731     secs %= 60;
1732     hours = mins / 60;
1733     mins %= 60;
1734
1735     bitrate = pts ? total_size * 8 / (pts / 1000.0) : 0;
1736
1737     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1738              "size=%8.0fkB time=", total_size / 1024.0);
1739     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1740              "%02d:%02d:%02d.%02d ", hours, mins, secs,
1741              (100 * us) / AV_TIME_BASE);
1742     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1743              "bitrate=%6.1fkbits/s", bitrate);
1744
1745     if (nb_frames_dup || nb_frames_drop)
1746         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1747                 nb_frames_dup, nb_frames_drop);
1748
1749     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1750
1751     fflush(stderr);
1752
1753     if (is_last_report) {
1754         int64_t raw= audio_size + video_size + extra_size;
1755         av_log(NULL, AV_LOG_INFO, "\n");
1756         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
1757                video_size / 1024.0,
1758                audio_size / 1024.0,
1759                extra_size / 1024.0,
1760                100.0 * (total_size - raw) / raw
1761         );
1762         if(video_size + audio_size + extra_size == 0){
1763             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
1764         }
1765     }
1766 }
1767
1768 static void flush_encoders(OutputStream *ost_table, int nb_ostreams)
1769 {
1770     int i, ret;
1771
1772     for (i = 0; i < nb_ostreams; i++) {
1773         OutputStream   *ost = &ost_table[i];
1774         AVCodecContext *enc = ost->st->codec;
1775         AVFormatContext *os = output_files[ost->file_index].ctx;
1776         int stop_encoding = 0;
1777
1778         if (!ost->encoding_needed)
1779             continue;
1780
1781         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1782             continue;
1783         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
1784             continue;
1785
1786         for (;;) {
1787             AVPacket pkt;
1788             int fifo_bytes;
1789             av_init_packet(&pkt);
1790             pkt.data = NULL;
1791             pkt.size = 0;
1792
1793             switch (ost->st->codec->codec_type) {
1794             case AVMEDIA_TYPE_AUDIO:
1795                 fifo_bytes = av_fifo_size(ost->fifo);
1796                 if (fifo_bytes > 0) {
1797                     /* encode any samples remaining in fifo */
1798                     int frame_bytes = fifo_bytes;
1799
1800                     av_fifo_generic_read(ost->fifo, audio_buf, fifo_bytes, NULL);
1801
1802                     /* pad last frame with silence if needed */
1803                     if (!(enc->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME)) {
1804                         frame_bytes = enc->frame_size * enc->channels *
1805                                       av_get_bytes_per_sample(enc->sample_fmt);
1806                         if (allocated_audio_buf_size < frame_bytes)
1807                             exit_program(1);
1808                         generate_silence(audio_buf+fifo_bytes, enc->sample_fmt, frame_bytes - fifo_bytes);
1809                     }
1810                     encode_audio_frame(os, ost, audio_buf, frame_bytes);
1811                 } else {
1812                     /* flush encoder with NULL frames until it is done
1813                        returning packets */
1814                     if (encode_audio_frame(os, ost, NULL, 0) == 0) {
1815                         stop_encoding = 1;
1816                         break;
1817                     }
1818                 }
1819                 break;
1820             case AVMEDIA_TYPE_VIDEO:
1821                 ret = avcodec_encode_video(enc, bit_buffer, bit_buffer_size, NULL);
1822                 if (ret < 0) {
1823                     av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1824                     exit_program(1);
1825                 }
1826                 video_size += ret;
1827                 if (enc->coded_frame && enc->coded_frame->key_frame)
1828                     pkt.flags |= AV_PKT_FLAG_KEY;
1829                 if (ost->logfile && enc->stats_out) {
1830                     fprintf(ost->logfile, "%s", enc->stats_out);
1831                 }
1832                 if (ret <= 0) {
1833                     stop_encoding = 1;
1834                     break;
1835                 }
1836                 pkt.stream_index = ost->index;
1837                 pkt.data = bit_buffer;
1838                 pkt.size = ret;
1839                 if (enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
1840                     pkt.pts = av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
1841                 write_frame(os, &pkt, ost);
1842                 break;
1843             default:
1844                 stop_encoding = 1;
1845             }
1846             if (stop_encoding)
1847                 break;
1848         }
1849     }
1850 }
1851
1852 /*
1853  * Check whether a packet from ist should be written into ost at this time
1854  */
1855 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1856 {
1857     OutputFile *of = &output_files[ost->file_index];
1858     int ist_index  = ist - input_streams;
1859
1860     if (ost->source_index != ist_index)
1861         return 0;
1862
1863     if (of->start_time && ist->pts < of->start_time)
1864         return 0;
1865
1866     if (of->recording_time != INT64_MAX &&
1867         av_compare_ts(ist->pts, AV_TIME_BASE_Q, of->recording_time + of->start_time,
1868                       (AVRational){ 1, 1000000 }) >= 0) {
1869         ost->is_past_recording_time = 1;
1870         return 0;
1871     }
1872
1873     return 1;
1874 }
1875
1876 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1877 {
1878     OutputFile *of = &output_files[ost->file_index];
1879     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
1880     AVPicture pict;
1881     AVPacket opkt;
1882
1883     av_init_packet(&opkt);
1884
1885     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1886         !ost->copy_initial_nonkeyframes)
1887         return;
1888
1889     /* force the input stream PTS */
1890     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1891         audio_size += pkt->size;
1892     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1893         video_size += pkt->size;
1894         ost->sync_opts++;
1895     }
1896
1897     opkt.stream_index = ost->index;
1898     if (pkt->pts != AV_NOPTS_VALUE)
1899         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1900     else
1901         opkt.pts = AV_NOPTS_VALUE;
1902
1903     if (pkt->dts == AV_NOPTS_VALUE)
1904         opkt.dts = av_rescale_q(ist->pts, AV_TIME_BASE_Q, ost->st->time_base);
1905     else
1906         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1907     opkt.dts -= ost_tb_start_time;
1908
1909     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1910     opkt.flags    = pkt->flags;
1911
1912     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1913     if (  ost->st->codec->codec_id != CODEC_ID_H264
1914        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
1915        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
1916        ) {
1917         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1918             opkt.destruct = av_destruct_packet;
1919     } else {
1920         opkt.data = pkt->data;
1921         opkt.size = pkt->size;
1922     }
1923     if (of->ctx->oformat->flags & AVFMT_RAWPICTURE) {
1924         /* store AVPicture in AVPacket, as expected by the output format */
1925         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
1926         opkt.data = (uint8_t *)&pict;
1927         opkt.size = sizeof(AVPicture);
1928         opkt.flags |= AV_PKT_FLAG_KEY;
1929     }
1930
1931     write_frame(of->ctx, &opkt, ost);
1932     ost->st->codec->frame_number++;
1933     av_free_packet(&opkt);
1934 }
1935
1936 static void rate_emu_sleep(InputStream *ist)
1937 {
1938     if (input_files[ist->file_index].rate_emu) {
1939         int64_t pts = av_rescale(ist->pts, 1000000, AV_TIME_BASE);
1940         int64_t now = av_gettime() - ist->start;
1941         if (pts > now)
1942             usleep(pts - now);
1943     }
1944 }
1945
1946 static int transcode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1947 {
1948     AVFrame *decoded_frame;
1949     AVCodecContext *avctx = ist->st->codec;
1950     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
1951     int i, ret;
1952
1953     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1954         return AVERROR(ENOMEM);
1955     else
1956         avcodec_get_frame_defaults(ist->decoded_frame);
1957     decoded_frame = ist->decoded_frame;
1958
1959     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1960     if (ret < 0) {
1961         return ret;
1962     }
1963
1964     if (!*got_output) {
1965         /* no audio frame */
1966         return ret;
1967     }
1968
1969     /* if the decoder provides a pts, use it instead of the last packet pts.
1970        the decoder could be delaying output by a packet or more. */
1971     if (decoded_frame->pts != AV_NOPTS_VALUE)
1972         ist->next_pts = decoded_frame->pts;
1973
1974     /* increment next_pts to use for the case where the input stream does not
1975        have timestamps or there are multiple frames in the packet */
1976     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1977                      avctx->sample_rate;
1978
1979     // preprocess audio (volume)
1980     if (audio_volume != 256) {
1981         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
1982         void *samples = decoded_frame->data[0];
1983         switch (avctx->sample_fmt) {
1984         case AV_SAMPLE_FMT_U8:
1985         {
1986             uint8_t *volp = samples;
1987             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1988                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
1989                 *volp++ = av_clip_uint8(v);
1990             }
1991             break;
1992         }
1993         case AV_SAMPLE_FMT_S16:
1994         {
1995             int16_t *volp = samples;
1996             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1997                 int v = ((*volp) * audio_volume + 128) >> 8;
1998                 *volp++ = av_clip_int16(v);
1999             }
2000             break;
2001         }
2002         case AV_SAMPLE_FMT_S32:
2003         {
2004             int32_t *volp = samples;
2005             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2006                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
2007                 *volp++ = av_clipl_int32(v);
2008             }
2009             break;
2010         }
2011         case AV_SAMPLE_FMT_FLT:
2012         {
2013             float *volp = samples;
2014             float scale = audio_volume / 256.f;
2015             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2016                 *volp++ *= scale;
2017             }
2018             break;
2019         }
2020         case AV_SAMPLE_FMT_DBL:
2021         {
2022             double *volp = samples;
2023             double scale = audio_volume / 256.;
2024             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2025                 *volp++ *= scale;
2026             }
2027             break;
2028         }
2029         default:
2030             av_log(NULL, AV_LOG_FATAL,
2031                    "Audio volume adjustment on sample format %s is not supported.\n",
2032                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
2033             exit_program(1);
2034         }
2035     }
2036
2037     rate_emu_sleep(ist);
2038
2039     for (i = 0; i < nb_output_streams; i++) {
2040         OutputStream *ost = &output_streams[i];
2041
2042         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2043             continue;
2044         do_audio_out(output_files[ost->file_index].ctx, ost, ist, decoded_frame);
2045     }
2046
2047     return ret;
2048 }
2049
2050 static int transcode_video(InputStream *ist, AVPacket *pkt, int *got_output, int64_t *pkt_pts, int64_t *pkt_dts)
2051 {
2052     AVFrame *decoded_frame, *filtered_frame = NULL;
2053     void *buffer_to_free = NULL;
2054     int i, ret = 0;
2055     float quality = 0;
2056 #if CONFIG_AVFILTER
2057     int frame_available = 1;
2058 #endif
2059     int duration=0;
2060     int64_t *best_effort_timestamp;
2061     AVRational *frame_sample_aspect;
2062
2063     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2064         return AVERROR(ENOMEM);
2065     else
2066         avcodec_get_frame_defaults(ist->decoded_frame);
2067     decoded_frame = ist->decoded_frame;
2068     pkt->pts  = *pkt_pts;
2069     pkt->dts  = *pkt_dts;
2070     *pkt_pts  = AV_NOPTS_VALUE;
2071
2072     if (pkt->duration) {
2073         duration = av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2074     } else if(ist->st->codec->time_base.num != 0) {
2075         int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
2076         duration = ((int64_t)AV_TIME_BASE *
2077                           ist->st->codec->time_base.num * ticks) /
2078                           ist->st->codec->time_base.den;
2079     }
2080
2081     if(*pkt_dts != AV_NOPTS_VALUE && duration) {
2082         *pkt_dts += duration;
2083     }else
2084         *pkt_dts = AV_NOPTS_VALUE;
2085
2086     ret = avcodec_decode_video2(ist->st->codec,
2087                                 decoded_frame, got_output, pkt);
2088     if (ret < 0)
2089         return ret;
2090
2091     quality = same_quant ? decoded_frame->quality : 0;
2092     if (!*got_output) {
2093         /* no picture yet */
2094         return ret;
2095     }
2096
2097     best_effort_timestamp= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "best_effort_timestamp");
2098     if(*best_effort_timestamp != AV_NOPTS_VALUE)
2099         ist->next_pts = ist->pts = *best_effort_timestamp;
2100
2101     ist->next_pts += duration;
2102     pkt->size = 0;
2103
2104     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2105
2106 #if CONFIG_AVFILTER
2107     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2108     for(i=0;i<nb_output_streams;i++) {
2109         OutputStream *ost = ost = &output_streams[i];
2110         if(check_output_constraints(ist, ost) && ost->encoding_needed){
2111             if (!frame_sample_aspect->num)
2112                 *frame_sample_aspect = ist->st->sample_aspect_ratio;
2113             decoded_frame->pts = ist->pts;
2114             if (ist->dr1 && decoded_frame->type==FF_BUFFER_TYPE_USER) {
2115                 FrameBuffer      *buf = decoded_frame->opaque;
2116                 AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2117                                             decoded_frame->data, decoded_frame->linesize,
2118                                             AV_PERM_READ | AV_PERM_PRESERVE,
2119                                             ist->st->codec->width, ist->st->codec->height,
2120                                             ist->st->codec->pix_fmt);
2121
2122                 avfilter_copy_frame_props(fb, decoded_frame);
2123                 fb->pts                 = ist->pts;
2124                 fb->buf->priv           = buf;
2125                 fb->buf->free           = filter_release_buffer;
2126
2127                 buf->refcount++;
2128                 av_buffersrc_buffer(ost->input_video_filter, fb);
2129             } else
2130             if((av_vsrc_buffer_add_frame(ost->input_video_filter, decoded_frame, AV_VSRC_BUF_FLAG_OVERWRITE)) < 0){
2131                 av_log(0, AV_LOG_FATAL, "Failed to inject frame into filter network\n");
2132                 exit_program(1);
2133             }
2134         }
2135     }
2136 #endif
2137
2138     rate_emu_sleep(ist);
2139
2140     for (i = 0; i < nb_output_streams; i++) {
2141         OutputStream *ost = &output_streams[i];
2142         int frame_size;
2143
2144         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2145             continue;
2146
2147 #if CONFIG_AVFILTER
2148         if (ost->input_video_filter) {
2149             frame_available = av_buffersink_poll_frame(ost->output_video_filter);
2150         }
2151         while (frame_available) {
2152             if (ost->output_video_filter) {
2153                 AVRational ist_pts_tb = ost->output_video_filter->inputs[0]->time_base;
2154                 if (av_buffersink_get_buffer_ref(ost->output_video_filter, &ost->picref, 0) < 0){
2155                     av_log(0, AV_LOG_WARNING, "AV Filter told us it has a frame available but failed to output one\n");
2156                     goto cont;
2157                 }
2158                 if (!ist->filtered_frame && !(ist->filtered_frame = avcodec_alloc_frame())) {
2159                     av_free(buffer_to_free);
2160                     return AVERROR(ENOMEM);
2161                 } else
2162                     avcodec_get_frame_defaults(ist->filtered_frame);
2163                 filtered_frame = ist->filtered_frame;
2164                 *filtered_frame= *decoded_frame; //for me_threshold
2165                 if (ost->picref) {
2166                     avfilter_fill_frame_from_video_buffer_ref(filtered_frame, ost->picref);
2167                     ist->pts = av_rescale_q(ost->picref->pts, ist_pts_tb, AV_TIME_BASE_Q);
2168                 }
2169             }
2170             if (ost->picref->video && !ost->frame_aspect_ratio)
2171                 ost->st->codec->sample_aspect_ratio = ost->picref->video->sample_aspect_ratio;
2172 #else
2173             filtered_frame = decoded_frame;
2174 #endif
2175
2176             do_video_out(output_files[ost->file_index].ctx, ost, ist, filtered_frame, &frame_size,
2177                          same_quant ? quality : ost->st->codec->global_quality);
2178             if (vstats_filename && frame_size)
2179                 do_video_stats(output_files[ost->file_index].ctx, ost, frame_size);
2180 #if CONFIG_AVFILTER
2181             cont:
2182             frame_available = ost->output_video_filter && av_buffersink_poll_frame(ost->output_video_filter);
2183             avfilter_unref_buffer(ost->picref);
2184         }
2185 #endif
2186     }
2187
2188     av_free(buffer_to_free);
2189     return ret;
2190 }
2191
2192 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2193 {
2194     AVSubtitle subtitle;
2195     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2196                                           &subtitle, got_output, pkt);
2197     if (ret < 0)
2198         return ret;
2199     if (!*got_output)
2200         return ret;
2201
2202     rate_emu_sleep(ist);
2203
2204     for (i = 0; i < nb_output_streams; i++) {
2205         OutputStream *ost = &output_streams[i];
2206
2207         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2208             continue;
2209
2210         do_subtitle_out(output_files[ost->file_index].ctx, ost, ist, &subtitle, pkt->pts);
2211     }
2212
2213     avsubtitle_free(&subtitle);
2214     return ret;
2215 }
2216
2217 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2218 static int output_packet(InputStream *ist,
2219                          OutputStream *ost_table, int nb_ostreams,
2220                          const AVPacket *pkt)
2221 {
2222     int ret = 0, i;
2223     int got_output;
2224     int64_t pkt_dts = AV_NOPTS_VALUE;
2225     int64_t pkt_pts = AV_NOPTS_VALUE;
2226
2227     AVPacket avpkt;
2228
2229     if (ist->next_pts == AV_NOPTS_VALUE)
2230         ist->next_pts = ist->pts;
2231
2232     if (pkt == NULL) {
2233         /* EOF handling */
2234         av_init_packet(&avpkt);
2235         avpkt.data = NULL;
2236         avpkt.size = 0;
2237         goto handle_eof;
2238     } else {
2239         avpkt = *pkt;
2240     }
2241
2242     if (pkt->dts != AV_NOPTS_VALUE) {
2243         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2244             ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2245         pkt_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2246     }
2247     if(pkt->pts != AV_NOPTS_VALUE)
2248         pkt_pts = av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2249
2250     // while we have more to decode or while the decoder did output something on EOF
2251     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2252     handle_eof:
2253
2254         ist->pts = ist->next_pts;
2255
2256         if (avpkt.size && avpkt.size != pkt->size) {
2257             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2258                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2259             ist->showed_multi_packet_warning = 1;
2260         }
2261
2262         switch (ist->st->codec->codec_type) {
2263         case AVMEDIA_TYPE_AUDIO:
2264             ret = transcode_audio    (ist, &avpkt, &got_output);
2265             break;
2266         case AVMEDIA_TYPE_VIDEO:
2267             ret = transcode_video    (ist, &avpkt, &got_output, &pkt_pts, &pkt_dts);
2268             break;
2269         case AVMEDIA_TYPE_SUBTITLE:
2270             ret = transcode_subtitles(ist, &avpkt, &got_output);
2271             break;
2272         default:
2273             return -1;
2274         }
2275
2276         if (ret < 0)
2277             return ret;
2278
2279         avpkt.dts=
2280         avpkt.pts= AV_NOPTS_VALUE;
2281
2282         // touch data and size only if not EOF
2283         if (pkt) {
2284             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
2285                 ret = avpkt.size;
2286             avpkt.data += ret;
2287             avpkt.size -= ret;
2288         }
2289         if (!got_output) {
2290             continue;
2291         }
2292     }
2293
2294     /* handle stream copy */
2295     if (!ist->decoding_needed) {
2296         rate_emu_sleep(ist);
2297         ist->pts = ist->next_pts;
2298         switch (ist->st->codec->codec_type) {
2299         case AVMEDIA_TYPE_AUDIO:
2300             ist->next_pts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2301                              ist->st->codec->sample_rate;
2302             break;
2303         case AVMEDIA_TYPE_VIDEO:
2304             if (pkt->duration) {
2305                 ist->next_pts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2306             } else if(ist->st->codec->time_base.num != 0) {
2307                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2308                 ist->next_pts += ((int64_t)AV_TIME_BASE *
2309                                   ist->st->codec->time_base.num * ticks) /
2310                                   ist->st->codec->time_base.den;
2311             }
2312             break;
2313         }
2314     }
2315     for (i = 0; pkt && i < nb_ostreams; i++) {
2316         OutputStream *ost = &ost_table[i];
2317
2318         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2319             continue;
2320
2321         do_streamcopy(ist, ost, pkt);
2322     }
2323
2324     return 0;
2325 }
2326
2327 static void print_sdp(OutputFile *output_files, int n)
2328 {
2329     char sdp[2048];
2330     int i;
2331     AVFormatContext **avc = av_malloc(sizeof(*avc) * n);
2332
2333     if (!avc)
2334         exit_program(1);
2335     for (i = 0; i < n; i++)
2336         avc[i] = output_files[i].ctx;
2337
2338     av_sdp_create(avc, n, sdp, sizeof(sdp));
2339     printf("SDP:\n%s\n", sdp);
2340     fflush(stdout);
2341     av_freep(&avc);
2342 }
2343
2344 static int init_input_stream(int ist_index, OutputStream *output_streams, int nb_output_streams,
2345                              char *error, int error_len)
2346 {
2347     InputStream *ist = &input_streams[ist_index];
2348     if (ist->decoding_needed) {
2349         AVCodec *codec = ist->dec;
2350         if (!codec) {
2351             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2352                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
2353             return AVERROR(EINVAL);
2354         }
2355
2356         ist->dr1 = codec->capabilities & CODEC_CAP_DR1;
2357         if (codec->type == AVMEDIA_TYPE_VIDEO && ist->dr1) {
2358             ist->st->codec->get_buffer     = codec_get_buffer;
2359             ist->st->codec->release_buffer = codec_release_buffer;
2360             ist->st->codec->opaque         = ist;
2361         }
2362
2363         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2364             av_dict_set(&ist->opts, "threads", "auto", 0);
2365         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2366             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2367                     ist->file_index, ist->st->index);
2368             return AVERROR(EINVAL);
2369         }
2370         assert_codec_experimental(ist->st->codec, 0);
2371         assert_avoptions(ist->opts);
2372     }
2373
2374     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;
2375     ist->next_pts = AV_NOPTS_VALUE;
2376     ist->is_start = 1;
2377
2378     return 0;
2379 }
2380
2381 static int transcode_init(OutputFile *output_files, int nb_output_files,
2382                           InputFile  *input_files,  int nb_input_files)
2383 {
2384     int ret = 0, i, j, k;
2385     AVFormatContext *oc;
2386     AVCodecContext *codec, *icodec;
2387     OutputStream *ost;
2388     InputStream *ist;
2389     char error[1024];
2390     int want_sdp = 1;
2391
2392     /* init framerate emulation */
2393     for (i = 0; i < nb_input_files; i++) {
2394         InputFile *ifile = &input_files[i];
2395         if (ifile->rate_emu)
2396             for (j = 0; j < ifile->nb_streams; j++)
2397                 input_streams[j + ifile->ist_index].start = av_gettime();
2398     }
2399
2400     /* output stream init */
2401     for (i = 0; i < nb_output_files; i++) {
2402         oc = output_files[i].ctx;
2403         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2404             av_dump_format(oc, i, oc->filename, 1);
2405             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2406             return AVERROR(EINVAL);
2407         }
2408     }
2409
2410     /* for each output stream, we compute the right encoding parameters */
2411     for (i = 0; i < nb_output_streams; i++) {
2412         ost = &output_streams[i];
2413         oc  = output_files[ost->file_index].ctx;
2414         ist = &input_streams[ost->source_index];
2415
2416         if (ost->attachment_filename)
2417             continue;
2418
2419         codec  = ost->st->codec;
2420         icodec = ist->st->codec;
2421
2422         ost->st->disposition          = ist->st->disposition;
2423         codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2424         codec->chroma_sample_location = icodec->chroma_sample_location;
2425
2426         if (ost->stream_copy) {
2427             uint64_t extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2428
2429             if (extra_size > INT_MAX) {
2430                 return AVERROR(EINVAL);
2431             }
2432
2433             /* if stream_copy is selected, no need to decode or encode */
2434             codec->codec_id   = icodec->codec_id;
2435             codec->codec_type = icodec->codec_type;
2436
2437             if (!codec->codec_tag) {
2438                 if (!oc->oformat->codec_tag ||
2439                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2440                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2441                     codec->codec_tag = icodec->codec_tag;
2442             }
2443
2444             codec->bit_rate       = icodec->bit_rate;
2445             codec->rc_max_rate    = icodec->rc_max_rate;
2446             codec->rc_buffer_size = icodec->rc_buffer_size;
2447             codec->field_order    = icodec->field_order;
2448             codec->extradata      = av_mallocz(extra_size);
2449             if (!codec->extradata) {
2450                 return AVERROR(ENOMEM);
2451             }
2452             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2453             codec->extradata_size= icodec->extradata_size;
2454
2455             codec->time_base = ist->st->time_base;
2456             if(!strcmp(oc->oformat->name, "avi")) {
2457                 if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2458                                  && av_q2d(ist->st->time_base) < 1.0/500
2459                     || copy_tb==0){
2460                     codec->time_base = icodec->time_base;
2461                     codec->time_base.num *= icodec->ticks_per_frame;
2462                     codec->time_base.den *= 2;
2463                 }
2464             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2465                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2466                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2467             ) {
2468                 if(   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
2469                                 && av_q2d(ist->st->time_base) < 1.0/500
2470                    || copy_tb==0){
2471                     codec->time_base = icodec->time_base;
2472                     codec->time_base.num *= icodec->ticks_per_frame;
2473                 }
2474             }
2475             av_reduce(&codec->time_base.num, &codec->time_base.den,
2476                         codec->time_base.num, codec->time_base.den, INT_MAX);
2477
2478             switch (codec->codec_type) {
2479             case AVMEDIA_TYPE_AUDIO:
2480                 if (audio_volume != 256) {
2481                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2482                     exit_program(1);
2483                 }
2484                 codec->channel_layout     = icodec->channel_layout;
2485                 codec->sample_rate        = icodec->sample_rate;
2486                 codec->channels           = icodec->channels;
2487                 codec->frame_size         = icodec->frame_size;
2488                 codec->audio_service_type = icodec->audio_service_type;
2489                 codec->block_align        = icodec->block_align;
2490                 break;
2491             case AVMEDIA_TYPE_VIDEO:
2492                 codec->pix_fmt            = icodec->pix_fmt;
2493                 codec->width              = icodec->width;
2494                 codec->height             = icodec->height;
2495                 codec->has_b_frames       = icodec->has_b_frames;
2496                 if (!codec->sample_aspect_ratio.num) {
2497                     codec->sample_aspect_ratio   =
2498                     ost->st->sample_aspect_ratio =
2499                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2500                         ist->st->codec->sample_aspect_ratio.num ?
2501                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2502                 }
2503                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2504                 break;
2505             case AVMEDIA_TYPE_SUBTITLE:
2506                 codec->width  = icodec->width;
2507                 codec->height = icodec->height;
2508                 break;
2509             case AVMEDIA_TYPE_DATA:
2510             case AVMEDIA_TYPE_ATTACHMENT:
2511                 break;
2512             default:
2513                 abort();
2514             }
2515         } else {
2516             if (!ost->enc)
2517                 ost->enc = avcodec_find_encoder(ost->st->codec->codec_id);
2518
2519             ist->decoding_needed = 1;
2520             ost->encoding_needed = 1;
2521
2522             switch (codec->codec_type) {
2523             case AVMEDIA_TYPE_AUDIO:
2524                 ost->fifo = av_fifo_alloc(1024);
2525                 if (!ost->fifo) {
2526                     return AVERROR(ENOMEM);
2527                 }
2528                 if (!codec->sample_rate)
2529                     codec->sample_rate = icodec->sample_rate;
2530                 choose_sample_rate(ost->st, ost->enc);
2531                 codec->time_base = (AVRational){ 1, codec->sample_rate };
2532
2533                 if (codec->sample_fmt == AV_SAMPLE_FMT_NONE)
2534                     codec->sample_fmt = icodec->sample_fmt;
2535                 choose_sample_fmt(ost->st, ost->enc);
2536
2537                 if (ost->audio_channels_mapped) {
2538                     /* the requested output channel is set to the number of
2539                      * -map_channel only if no -ac are specified */
2540                     if (!codec->channels) {
2541                         codec->channels       = ost->audio_channels_mapped;
2542                         codec->channel_layout = av_get_default_channel_layout(codec->channels);
2543                         if (!codec->channel_layout) {
2544                             av_log(NULL, AV_LOG_FATAL, "Unable to find an appropriate channel layout for requested number of channel\n");
2545                             exit_program(1);
2546                         }
2547                     }
2548                     /* fill unused channel mapping with -1 (which means a muted
2549                      * channel in case the number of output channels is bigger
2550                      * than the number of mapped channel) */
2551                     for (j = ost->audio_channels_mapped; j < FF_ARRAY_ELEMS(ost->audio_channels_map); j++)
2552                         ost->audio_channels_map[j] = -1;
2553                 } else if (!codec->channels) {
2554                     codec->channels = icodec->channels;
2555                     codec->channel_layout = icodec->channel_layout;
2556                 }
2557                 if (av_get_channel_layout_nb_channels(codec->channel_layout) != codec->channels)
2558                     codec->channel_layout = 0;
2559
2560                 ost->audio_resample       = codec->sample_rate != icodec->sample_rate || audio_sync_method > 1;
2561                 ost->audio_resample      |=    codec->sample_fmt     != icodec->sample_fmt
2562                                             || codec->channel_layout != icodec->channel_layout;
2563                 icodec->request_channels  = codec->channels;
2564                 ost->resample_sample_fmt  = icodec->sample_fmt;
2565                 ost->resample_sample_rate = icodec->sample_rate;
2566                 ost->resample_channels    = icodec->channels;
2567                 break;
2568             case AVMEDIA_TYPE_VIDEO:
2569                 if (codec->pix_fmt == PIX_FMT_NONE)
2570                     codec->pix_fmt = icodec->pix_fmt;
2571                 choose_pixel_fmt(ost->st, ost->enc);
2572
2573                 if (ost->st->codec->pix_fmt == PIX_FMT_NONE) {
2574                     av_log(NULL, AV_LOG_FATAL, "Video pixel format is unknown, stream cannot be encoded\n");
2575                     exit_program(1);
2576                 }
2577
2578                 if (!codec->width || !codec->height) {
2579                     codec->width  = icodec->width;
2580                     codec->height = icodec->height;
2581                 }
2582
2583                 ost->video_resample = codec->width   != icodec->width  ||
2584                                       codec->height  != icodec->height ||
2585                                       codec->pix_fmt != icodec->pix_fmt;
2586                 if (ost->video_resample) {
2587                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
2588                 }
2589
2590                 ost->resample_height  = icodec->height;
2591                 ost->resample_width   = icodec->width;
2592                 ost->resample_pix_fmt = icodec->pix_fmt;
2593
2594                 if (!ost->frame_rate.num)
2595                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational) { 25, 1 };
2596                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2597                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2598                     ost->frame_rate = ost->enc->supported_framerates[idx];
2599                 }
2600                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
2601                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method
2602                    && (video_sync_method==1 || (video_sync_method<0 && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
2603                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not effciciently supporting it.\n"
2604                                                "Please consider specifiying a lower framerate, a different muxer or -vsync 2\n");
2605                 }
2606                 for (j = 0; j < ost->forced_kf_count; j++)
2607                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
2608                                                          AV_TIME_BASE_Q,
2609                                                          codec->time_base);
2610
2611 #if CONFIG_AVFILTER
2612                 if (configure_video_filters(ist, ost)) {
2613                     av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2614                     exit(1);
2615                 }
2616 #endif
2617                 break;
2618             case AVMEDIA_TYPE_SUBTITLE:
2619                 break;
2620             default:
2621                 abort();
2622                 break;
2623             }
2624             /* two pass mode */
2625             if (codec->codec_id != CODEC_ID_H264 &&
2626                 (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
2627                 char logfilename[1024];
2628                 FILE *f;
2629
2630                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2631                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
2632                          i);
2633                 if (codec->flags & CODEC_FLAG_PASS2) {
2634                     char  *logbuffer;
2635                     size_t logbuffer_size;
2636                     if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2637                         av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2638                                logfilename);
2639                         exit_program(1);
2640                     }
2641                     codec->stats_in = logbuffer;
2642                 }
2643                 if (codec->flags & CODEC_FLAG_PASS1) {
2644                     f = fopen(logfilename, "wb");
2645                     if (!f) {
2646                         av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2647                                logfilename, strerror(errno));
2648                         exit_program(1);
2649                     }
2650                     ost->logfile = f;
2651                 }
2652             }
2653         }
2654         if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2655             /* maximum video buffer size is 8-bytes per pixel, plus DPX header size (1664)*/
2656             int size        = codec->width * codec->height;
2657             bit_buffer_size = FFMAX(bit_buffer_size, 9*size + 10000);
2658         }
2659     }
2660
2661     if (!bit_buffer)
2662         bit_buffer = av_malloc(bit_buffer_size);
2663     if (!bit_buffer) {
2664         av_log(NULL, AV_LOG_ERROR, "Cannot allocate %d bytes output buffer\n",
2665                bit_buffer_size);
2666         return AVERROR(ENOMEM);
2667     }
2668
2669     /* open each encoder */
2670     for (i = 0; i < nb_output_streams; i++) {
2671         ost = &output_streams[i];
2672         if (ost->encoding_needed) {
2673             AVCodec      *codec = ost->enc;
2674             AVCodecContext *dec = input_streams[ost->source_index].st->codec;
2675             if (!codec) {
2676                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
2677                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
2678                 ret = AVERROR(EINVAL);
2679                 goto dump_format;
2680             }
2681             if (dec->subtitle_header) {
2682                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
2683                 if (!ost->st->codec->subtitle_header) {
2684                     ret = AVERROR(ENOMEM);
2685                     goto dump_format;
2686                 }
2687                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2688                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2689             }
2690             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2691                 av_dict_set(&ost->opts, "threads", "auto", 0);
2692             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
2693                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2694                         ost->file_index, ost->index);
2695                 ret = AVERROR(EINVAL);
2696                 goto dump_format;
2697             }
2698             assert_codec_experimental(ost->st->codec, 1);
2699             assert_avoptions(ost->opts);
2700             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2701                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2702                                              " It takes bits/s as argument, not kbits/s\n");
2703             extra_size += ost->st->codec->extradata_size;
2704
2705             if (ost->st->codec->me_threshold)
2706                 input_streams[ost->source_index].st->codec->debug |= FF_DEBUG_MV;
2707         }
2708     }
2709
2710     /* init input streams */
2711     for (i = 0; i < nb_input_streams; i++)
2712         if ((ret = init_input_stream(i, output_streams, nb_output_streams, error, sizeof(error))) < 0)
2713             goto dump_format;
2714
2715     /* discard unused programs */
2716     for (i = 0; i < nb_input_files; i++) {
2717         InputFile *ifile = &input_files[i];
2718         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2719             AVProgram *p = ifile->ctx->programs[j];
2720             int discard  = AVDISCARD_ALL;
2721
2722             for (k = 0; k < p->nb_stream_indexes; k++)
2723                 if (!input_streams[ifile->ist_index + p->stream_index[k]].discard) {
2724                     discard = AVDISCARD_DEFAULT;
2725                     break;
2726                 }
2727             p->discard = discard;
2728         }
2729     }
2730
2731     /* open files and write file headers */
2732     for (i = 0; i < nb_output_files; i++) {
2733         oc = output_files[i].ctx;
2734         oc->interrupt_callback = int_cb;
2735         if (avformat_write_header(oc, &output_files[i].opts) < 0) {
2736             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?)", i);
2737             ret = AVERROR(EINVAL);
2738             goto dump_format;
2739         }
2740 //        assert_avoptions(output_files[i].opts);
2741         if (strcmp(oc->oformat->name, "rtp")) {
2742             want_sdp = 0;
2743         }
2744     }
2745
2746  dump_format:
2747     /* dump the file output parameters - cannot be done before in case
2748        of stream copy */
2749     for (i = 0; i < nb_output_files; i++) {
2750         av_dump_format(output_files[i].ctx, i, output_files[i].ctx->filename, 1);
2751     }
2752
2753     /* dump the stream mapping */
2754     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2755     for (i = 0; i < nb_output_streams; i++) {
2756         ost = &output_streams[i];
2757
2758         if (ost->attachment_filename) {
2759             /* an attached file */
2760             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2761                    ost->attachment_filename, ost->file_index, ost->index);
2762             continue;
2763         }
2764         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2765                input_streams[ost->source_index].file_index,
2766                input_streams[ost->source_index].st->index,
2767                ost->file_index,
2768                ost->index);
2769         if (ost->audio_channels_mapped) {
2770             av_log(NULL, AV_LOG_INFO, " [ch:");
2771             for (j = 0; j < ost->audio_channels_mapped; j++)
2772                 if (ost->audio_channels_map[j] == -1)
2773                     av_log(NULL, AV_LOG_INFO, " M");
2774                 else
2775                     av_log(NULL, AV_LOG_INFO, " %d", ost->audio_channels_map[j]);
2776             av_log(NULL, AV_LOG_INFO, "]");
2777         }
2778         if (ost->sync_ist != &input_streams[ost->source_index])
2779             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2780                    ost->sync_ist->file_index,
2781                    ost->sync_ist->st->index);
2782         if (ost->stream_copy)
2783             av_log(NULL, AV_LOG_INFO, " (copy)");
2784         else
2785             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index].dec ?
2786                    input_streams[ost->source_index].dec->name : "?",
2787                    ost->enc ? ost->enc->name : "?");
2788         av_log(NULL, AV_LOG_INFO, "\n");
2789     }
2790
2791     if (ret) {
2792         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2793         return ret;
2794     }
2795
2796     if (want_sdp) {
2797         print_sdp(output_files, nb_output_files);
2798     }
2799
2800     return 0;
2801 }
2802
2803 /*
2804  * The following code is the main loop of the file converter
2805  */
2806 static int transcode(OutputFile *output_files, int nb_output_files,
2807                      InputFile  *input_files,  int nb_input_files)
2808 {
2809     int ret, i;
2810     AVFormatContext *is, *os;
2811     OutputStream *ost;
2812     InputStream *ist;
2813     uint8_t *no_packet;
2814     int no_packet_count = 0;
2815     int64_t timer_start;
2816     int key;
2817
2818     if (!(no_packet = av_mallocz(nb_input_files)))
2819         exit_program(1);
2820
2821     ret = transcode_init(output_files, nb_output_files, input_files, nb_input_files);
2822     if (ret < 0)
2823         goto fail;
2824
2825     if (!using_stdin) {
2826         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
2827     }
2828
2829     timer_start = av_gettime();
2830
2831     for (; received_sigterm == 0;) {
2832         int file_index, ist_index;
2833         AVPacket pkt;
2834         int64_t ipts_min;
2835         double opts_min;
2836         int64_t cur_time= av_gettime();
2837
2838         ipts_min = INT64_MAX;
2839         opts_min = 1e100;
2840         /* if 'q' pressed, exits */
2841         if (!using_stdin) {
2842             static int64_t last_time;
2843             if (received_nb_signals)
2844                 break;
2845             /* read_key() returns 0 on EOF */
2846             if(cur_time - last_time >= 100000 && !run_as_daemon){
2847                 key =  read_key();
2848                 last_time = cur_time;
2849             }else
2850                 key = -1;
2851             if (key == 'q')
2852                 break;
2853             if (key == '+') av_log_set_level(av_log_get_level()+10);
2854             if (key == '-') av_log_set_level(av_log_get_level()-10);
2855             if (key == 's') qp_hist     ^= 1;
2856             if (key == 'h'){
2857                 if (do_hex_dump){
2858                     do_hex_dump = do_pkt_dump = 0;
2859                 } else if(do_pkt_dump){
2860                     do_hex_dump = 1;
2861                 } else
2862                     do_pkt_dump = 1;
2863                 av_log_set_level(AV_LOG_DEBUG);
2864             }
2865 #if CONFIG_AVFILTER
2866             if (key == 'c' || key == 'C'){
2867                 char buf[4096], target[64], command[256], arg[256] = {0};
2868                 double time;
2869                 int k, n = 0;
2870                 fprintf(stderr, "\nEnter command: <target> <time> <command>[ <argument>]\n");
2871                 i = 0;
2872                 while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
2873                     if (k > 0)
2874                         buf[i++] = k;
2875                 buf[i] = 0;
2876                 if (k > 0 &&
2877                     (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
2878                     av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
2879                            target, time, command, arg);
2880                     for (i = 0; i < nb_output_streams; i++) {
2881                         ost = &output_streams[i];
2882                         if (ost->graph) {
2883                             if (time < 0) {
2884                                 ret = avfilter_graph_send_command(ost->graph, target, command, arg, buf, sizeof(buf),
2885                                                                   key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
2886                                 fprintf(stderr, "Command reply for stream %d: ret:%d res:%s\n", i, ret, buf);
2887                             } else {
2888                                 ret = avfilter_graph_queue_command(ost->graph, target, command, arg, 0, time);
2889                             }
2890                         }
2891                     }
2892                 } else {
2893                     av_log(NULL, AV_LOG_ERROR,
2894                            "Parse error, at least 3 arguments were expected, "
2895                            "only %d given in string '%s'\n", n, buf);
2896                 }
2897             }
2898 #endif
2899             if (key == 'd' || key == 'D'){
2900                 int debug=0;
2901                 if(key == 'D') {
2902                     debug = input_streams[0].st->codec->debug<<1;
2903                     if(!debug) debug = 1;
2904                     while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
2905                         debug += debug;
2906                 }else
2907                     if(scanf("%d", &debug)!=1)
2908                         fprintf(stderr,"error parsing debug value\n");
2909                 for(i=0;i<nb_input_streams;i++) {
2910                     input_streams[i].st->codec->debug = debug;
2911                 }
2912                 for(i=0;i<nb_output_streams;i++) {
2913                     ost = &output_streams[i];
2914                     ost->st->codec->debug = debug;
2915                 }
2916                 if(debug) av_log_set_level(AV_LOG_DEBUG);
2917                 fprintf(stderr,"debug=%d\n", debug);
2918             }
2919             if (key == '?'){
2920                 fprintf(stderr, "key    function\n"
2921                                 "?      show this help\n"
2922                                 "+      increase verbosity\n"
2923                                 "-      decrease verbosity\n"
2924                                 "c      Send command to filtergraph\n"
2925                                 "D      cycle through available debug modes\n"
2926                                 "h      dump packets/hex press to cycle through the 3 states\n"
2927                                 "q      quit\n"
2928                                 "s      Show QP histogram\n"
2929                 );
2930             }
2931         }
2932
2933         /* select the stream that we must read now by looking at the
2934            smallest output pts */
2935         file_index = -1;
2936         for (i = 0; i < nb_output_streams; i++) {
2937             OutputFile *of;
2938             int64_t ipts;
2939             double  opts;
2940             ost = &output_streams[i];
2941             of = &output_files[ost->file_index];
2942             os = output_files[ost->file_index].ctx;
2943             ist = &input_streams[ost->source_index];
2944             if (ost->is_past_recording_time || no_packet[ist->file_index] ||
2945                 (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2946                 continue;
2947             opts = ost->st->pts.val * av_q2d(ost->st->time_base);
2948             ipts = ist->pts;
2949             if (!input_files[ist->file_index].eof_reached) {
2950                 if (ipts < ipts_min) {
2951                     ipts_min = ipts;
2952                     if (input_sync)
2953                         file_index = ist->file_index;
2954                 }
2955                 if (opts < opts_min) {
2956                     opts_min = opts;
2957                     if (!input_sync) file_index = ist->file_index;
2958                 }
2959             }
2960             if (ost->frame_number >= ost->max_frames) {
2961                 int j;
2962                 for (j = 0; j < of->ctx->nb_streams; j++)
2963                     output_streams[of->ost_index + j].is_past_recording_time = 1;
2964                 continue;
2965             }
2966         }
2967         /* if none, if is finished */
2968         if (file_index < 0) {
2969             if (no_packet_count) {
2970                 no_packet_count = 0;
2971                 memset(no_packet, 0, nb_input_files);
2972                 usleep(10000);
2973                 continue;
2974             }
2975             break;
2976         }
2977
2978         /* read a frame from it and output it in the fifo */
2979         is  = input_files[file_index].ctx;
2980         ret = av_read_frame(is, &pkt);
2981         if (ret == AVERROR(EAGAIN)) {
2982             no_packet[file_index] = 1;
2983             no_packet_count++;
2984             continue;
2985         }
2986         if (ret < 0) {
2987             input_files[file_index].eof_reached = 1;
2988             if (opt_shortest)
2989                 break;
2990             else
2991                 continue;
2992         }
2993
2994         no_packet_count = 0;
2995         memset(no_packet, 0, nb_input_files);
2996
2997         if (do_pkt_dump) {
2998             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2999                              is->streams[pkt.stream_index]);
3000         }
3001         /* the following test is needed in case new streams appear
3002            dynamically in stream : we ignore them */
3003         if (pkt.stream_index >= input_files[file_index].nb_streams)
3004             goto discard_packet;
3005         ist_index = input_files[file_index].ist_index + pkt.stream_index;
3006         ist = &input_streams[ist_index];
3007         if (ist->discard)
3008             goto discard_packet;
3009
3010         if (pkt.dts != AV_NOPTS_VALUE)
3011             pkt.dts += av_rescale_q(input_files[ist->file_index].ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3012         if (pkt.pts != AV_NOPTS_VALUE)
3013             pkt.pts += av_rescale_q(input_files[ist->file_index].ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3014
3015         if (pkt.pts != AV_NOPTS_VALUE)
3016             pkt.pts *= ist->ts_scale;
3017         if (pkt.dts != AV_NOPTS_VALUE)
3018             pkt.dts *= ist->ts_scale;
3019
3020         //fprintf(stderr, "next:%"PRId64" dts:%"PRId64" off:%"PRId64" %d\n",
3021         //        ist->next_pts,
3022         //        pkt.dts, input_files[ist->file_index].ts_offset,
3023         //        ist->st->codec->codec_type);
3024         if (pkt.dts != AV_NOPTS_VALUE && ist->next_pts != AV_NOPTS_VALUE
3025             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
3026             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3027             int64_t delta   = pkt_dts - ist->next_pts;
3028             if((delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3029                 (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3030                  ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3031                 pkt_dts+1<ist->pts)&& !copy_ts){
3032                 input_files[ist->file_index].ts_offset -= delta;
3033                 av_log(NULL, AV_LOG_DEBUG,
3034                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3035                        delta, input_files[ist->file_index].ts_offset);
3036                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3037                 if (pkt.pts != AV_NOPTS_VALUE)
3038                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3039             }
3040         }
3041
3042         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
3043         if (output_packet(ist, output_streams, nb_output_streams, &pkt) < 0) {
3044
3045             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
3046                    ist->file_index, ist->st->index);
3047             if (exit_on_error)
3048                 exit_program(1);
3049             av_free_packet(&pkt);
3050             continue;
3051         }
3052
3053     discard_packet:
3054         av_free_packet(&pkt);
3055
3056         /* dump report by using the output first video and audio streams */
3057         print_report(output_files, output_streams, nb_output_streams, 0, timer_start, cur_time);
3058     }
3059
3060     /* at the end of stream, we must flush the decoder buffers */
3061     for (i = 0; i < nb_input_streams; i++) {
3062         ist = &input_streams[i];
3063         if (ist->decoding_needed) {
3064             output_packet(ist, output_streams, nb_output_streams, NULL);
3065         }
3066     }
3067     flush_encoders(output_streams, nb_output_streams);
3068
3069     term_exit();
3070
3071     /* write the trailer if needed and close file */
3072     for (i = 0; i < nb_output_files; i++) {
3073         os = output_files[i].ctx;
3074         av_write_trailer(os);
3075     }
3076
3077     /* dump report by using the first video and audio streams */
3078     print_report(output_files, output_streams, nb_output_streams, 1, timer_start, av_gettime());
3079
3080     /* close each encoder */
3081     for (i = 0; i < nb_output_streams; i++) {
3082         ost = &output_streams[i];
3083         if (ost->encoding_needed) {
3084             av_freep(&ost->st->codec->stats_in);
3085             avcodec_close(ost->st->codec);
3086         }
3087 #if CONFIG_AVFILTER
3088         avfilter_graph_free(&ost->graph);
3089 #endif
3090     }
3091
3092     /* close each decoder */
3093     for (i = 0; i < nb_input_streams; i++) {
3094         ist = &input_streams[i];
3095         if (ist->decoding_needed) {
3096             avcodec_close(ist->st->codec);
3097         }
3098     }
3099
3100     /* finished ! */
3101     ret = 0;
3102
3103  fail:
3104     av_freep(&bit_buffer);
3105     av_freep(&no_packet);
3106
3107     if (output_streams) {
3108         for (i = 0; i < nb_output_streams; i++) {
3109             ost = &output_streams[i];
3110             if (ost) {
3111                 if (ost->stream_copy)
3112                     av_freep(&ost->st->codec->extradata);
3113                 if (ost->logfile) {
3114                     fclose(ost->logfile);
3115                     ost->logfile = NULL;
3116                 }
3117                 av_fifo_free(ost->fifo); /* works even if fifo is not
3118                                              initialized but set to zero */
3119                 av_freep(&ost->st->codec->subtitle_header);
3120                 av_free(ost->resample_frame.data[0]);
3121                 av_free(ost->forced_kf_pts);
3122                 if (ost->video_resample)
3123                     sws_freeContext(ost->img_resample_ctx);
3124                 swr_free(&ost->swr);
3125                 av_dict_free(&ost->opts);
3126             }
3127         }
3128     }
3129     return ret;
3130 }
3131
3132 static int opt_frame_crop(const char *opt, const char *arg)
3133 {
3134     av_log(NULL, AV_LOG_FATAL, "Option '%s' has been removed, use the crop filter instead\n", opt);
3135     return AVERROR(EINVAL);
3136 }
3137
3138 static int opt_pad(const char *opt, const char *arg)
3139 {
3140     av_log(NULL, AV_LOG_FATAL, "Option '%s' has been removed, use the pad filter instead\n", opt);
3141     return -1;
3142 }
3143
3144 static double parse_frame_aspect_ratio(const char *arg)
3145 {
3146     int x = 0, y = 0;
3147     double ar = 0;
3148     const char *p;
3149     char *end;
3150
3151     p = strchr(arg, ':');
3152     if (p) {
3153         x = strtol(arg, &end, 10);
3154         if (end == p)
3155             y = strtol(end + 1, &end, 10);
3156         if (x > 0 && y > 0)
3157             ar = (double)x / (double)y;
3158     } else
3159         ar = strtod(arg, NULL);
3160
3161     if (!ar) {
3162         av_log(NULL, AV_LOG_FATAL, "Incorrect aspect ratio specification.\n");
3163         exit_program(1);
3164     }
3165     return ar;
3166 }
3167
3168 static int opt_video_channel(const char *opt, const char *arg)
3169 {
3170     av_log(NULL, AV_LOG_WARNING, "This option is deprecated, use -channel.\n");
3171     return opt_default("channel", arg);
3172 }
3173
3174 static int opt_video_standard(const char *opt, const char *arg)
3175 {
3176     av_log(NULL, AV_LOG_WARNING, "This option is deprecated, use -standard.\n");
3177     return opt_default("standard", arg);
3178 }
3179
3180 static int opt_audio_codec(OptionsContext *o, const char *opt, const char *arg)
3181 {
3182     audio_codec_name = arg;
3183     return parse_option(o, "codec:a", arg, options);
3184 }
3185
3186 static int opt_video_codec(OptionsContext *o, const char *opt, const char *arg)
3187 {
3188     video_codec_name = arg;
3189     return parse_option(o, "codec:v", arg, options);
3190 }
3191
3192 static int opt_subtitle_codec(OptionsContext *o, const char *opt, const char *arg)
3193 {
3194     subtitle_codec_name = arg;
3195     return parse_option(o, "codec:s", arg, options);
3196 }
3197
3198 static int opt_data_codec(OptionsContext *o, const char *opt, const char *arg)
3199 {
3200     return parse_option(o, "codec:d", arg, options);
3201 }
3202
3203 static int opt_map(OptionsContext *o, const char *opt, const char *arg)
3204 {
3205     StreamMap *m = NULL;
3206     int i, negative = 0, file_idx;
3207     int sync_file_idx = -1, sync_stream_idx = 0;
3208     char *p, *sync;
3209     char *map;
3210
3211     if (*arg == '-') {
3212         negative = 1;
3213         arg++;
3214     }
3215     map = av_strdup(arg);
3216
3217     /* parse sync stream first, just pick first matching stream */
3218     if (sync = strchr(map, ',')) {
3219         *sync = 0;
3220         sync_file_idx = strtol(sync + 1, &sync, 0);
3221         if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
3222             av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
3223             exit_program(1);
3224         }
3225         if (*sync)
3226             sync++;
3227         for (i = 0; i < input_files[sync_file_idx].nb_streams; i++)
3228             if (check_stream_specifier(input_files[sync_file_idx].ctx,
3229                                        input_files[sync_file_idx].ctx->streams[i], sync) == 1) {
3230                 sync_stream_idx = i;
3231                 break;
3232             }
3233         if (i == input_files[sync_file_idx].nb_streams) {
3234             av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
3235                                        "match any streams.\n", arg);
3236             exit_program(1);
3237         }
3238     }
3239
3240
3241     file_idx = strtol(map, &p, 0);
3242     if (file_idx >= nb_input_files || file_idx < 0) {
3243         av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
3244         exit_program(1);
3245     }
3246     if (negative)
3247         /* disable some already defined maps */
3248         for (i = 0; i < o->nb_stream_maps; i++) {
3249             m = &o->stream_maps[i];
3250             if (file_idx == m->file_index &&
3251                 check_stream_specifier(input_files[m->file_index].ctx,
3252                                        input_files[m->file_index].ctx->streams[m->stream_index],
3253                                        *p == ':' ? p + 1 : p) > 0)
3254                 m->disabled = 1;
3255         }
3256     else
3257         for (i = 0; i < input_files[file_idx].nb_streams; i++) {
3258             if (check_stream_specifier(input_files[file_idx].ctx, input_files[file_idx].ctx->streams[i],
3259                         *p == ':' ? p + 1 : p) <= 0)
3260                 continue;
3261             o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3262                                         &o->nb_stream_maps, o->nb_stream_maps + 1);
3263             m = &o->stream_maps[o->nb_stream_maps - 1];
3264
3265             m->file_index   = file_idx;
3266             m->stream_index = i;
3267
3268             if (sync_file_idx >= 0) {
3269                 m->sync_file_index   = sync_file_idx;
3270                 m->sync_stream_index = sync_stream_idx;
3271             } else {
3272                 m->sync_file_index   = file_idx;
3273                 m->sync_stream_index = i;
3274             }
3275         }
3276
3277     if (!m) {
3278         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
3279         exit_program(1);
3280     }
3281
3282     av_freep(&map);
3283     return 0;
3284 }
3285
3286 static int opt_attach(OptionsContext *o, const char *opt, const char *arg)
3287 {
3288     o->attachments = grow_array(o->attachments, sizeof(*o->attachments),
3289                                 &o->nb_attachments, o->nb_attachments + 1);
3290     o->attachments[o->nb_attachments - 1] = arg;
3291     return 0;
3292 }
3293
3294 static int opt_map_channel(OptionsContext *o, const char *opt, const char *arg)
3295 {
3296     int n;
3297     AVStream *st;
3298     AudioChannelMap *m;
3299
3300     o->audio_channel_maps =
3301         grow_array(o->audio_channel_maps, sizeof(*o->audio_channel_maps),
3302                    &o->nb_audio_channel_maps, o->nb_audio_channel_maps + 1);
3303     m = &o->audio_channel_maps[o->nb_audio_channel_maps - 1];
3304
3305     /* muted channel syntax */
3306     n = sscanf(arg, "%d:%d.%d", &m->channel_idx, &m->ofile_idx, &m->ostream_idx);
3307     if ((n == 1 || n == 3) && m->channel_idx == -1) {
3308         m->file_idx = m->stream_idx = -1;
3309         if (n == 1)
3310             m->ofile_idx = m->ostream_idx = -1;
3311         return 0;
3312     }
3313
3314     /* normal syntax */
3315     n = sscanf(arg, "%d.%d.%d:%d.%d",
3316                &m->file_idx,  &m->stream_idx, &m->channel_idx,
3317                &m->ofile_idx, &m->ostream_idx);
3318
3319     if (n != 3 && n != 5) {
3320         av_log(NULL, AV_LOG_FATAL, "Syntax error, mapchan usage: "
3321                "[file.stream.channel|-1][:syncfile:syncstream]\n");
3322         exit_program(1);
3323     }
3324
3325     if (n != 5) // only file.stream.channel specified
3326         m->ofile_idx = m->ostream_idx = -1;
3327
3328     /* check input */
3329     if (m->file_idx < 0 || m->file_idx >= nb_input_files) {
3330         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid input file index: %d\n",
3331                m->file_idx);
3332         exit_program(1);
3333     }
3334     if (m->stream_idx < 0 ||
3335         m->stream_idx >= input_files[m->file_idx].nb_streams) {
3336         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid input file stream index #%d.%d\n",
3337                m->file_idx, m->stream_idx);
3338         exit_program(1);
3339     }
3340     st = input_files[m->file_idx].ctx->streams[m->stream_idx];
3341     if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
3342         av_log(NULL, AV_LOG_FATAL, "mapchan: stream #%d.%d is not an audio stream.\n",
3343                m->file_idx, m->stream_idx);
3344         exit_program(1);
3345     }
3346     if (m->channel_idx < 0 || m->channel_idx >= st->codec->channels) {
3347         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid audio channel #%d.%d.%d\n",
3348                m->file_idx, m->stream_idx, m->channel_idx);
3349         exit_program(1);
3350     }
3351     return 0;
3352 }
3353
3354 /**
3355  * Parse a metadata specifier in arg.
3356  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
3357  * @param index for type c/p, chapter/program index is written here
3358  * @param stream_spec for type s, the stream specifier is written here
3359  */
3360 static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
3361 {
3362     if (*arg) {
3363         *type = *arg;
3364         switch (*arg) {
3365         case 'g':
3366             break;
3367         case 's':
3368             if (*(++arg) && *arg != ':') {
3369                 av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
3370                 exit_program(1);
3371             }
3372             *stream_spec = *arg == ':' ? arg + 1 : "";
3373             break;
3374         case 'c':
3375         case 'p':
3376             if (*(++arg) == ':')
3377                 *index = strtol(++arg, NULL, 0);
3378             break;
3379         default:
3380             av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
3381             exit_program(1);
3382         }
3383     } else
3384         *type = 'g';
3385 }
3386
3387 static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
3388 {
3389     AVDictionary **meta_in = NULL;
3390     AVDictionary **meta_out = NULL;
3391     int i, ret = 0;
3392     char type_in, type_out;
3393     const char *istream_spec = NULL, *ostream_spec = NULL;
3394     int idx_in = 0, idx_out = 0;
3395
3396     parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
3397     parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
3398
3399     if (type_in == 'g' || type_out == 'g')
3400         o->metadata_global_manual = 1;
3401     if (type_in == 's' || type_out == 's')
3402         o->metadata_streams_manual = 1;
3403     if (type_in == 'c' || type_out == 'c')
3404         o->metadata_chapters_manual = 1;
3405
3406 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
3407     if ((index) < 0 || (index) >= (nb_elems)) {\
3408         av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
3409                 (desc), (index));\
3410         exit_program(1);\
3411     }
3412
3413 #define SET_DICT(type, meta, context, index)\
3414         switch (type) {\
3415         case 'g':\
3416             meta = &context->metadata;\
3417             break;\
3418         case 'c':\
3419             METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
3420             meta = &context->chapters[index]->metadata;\
3421             break;\
3422         case 'p':\
3423             METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
3424             meta = &context->programs[index]->metadata;\
3425             break;\
3426         }\
3427
3428     SET_DICT(type_in, meta_in, ic, idx_in);
3429     SET_DICT(type_out, meta_out, oc, idx_out);
3430
3431     /* for input streams choose first matching stream */
3432     if (type_in == 's') {
3433         for (i = 0; i < ic->nb_streams; i++) {
3434             if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
3435                 meta_in = &ic->streams[i]->metadata;
3436                 break;
3437             } else if (ret < 0)
3438                 exit_program(1);
3439         }
3440         if (!meta_in) {
3441             av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
3442             exit_program(1);
3443         }
3444     }
3445
3446     if (type_out == 's') {
3447         for (i = 0; i < oc->nb_streams; i++) {
3448             if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
3449                 meta_out = &oc->streams[i]->metadata;
3450                 av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3451             } else if (ret < 0)
3452                 exit_program(1);
3453         }
3454     } else
3455         av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3456
3457     return 0;
3458 }
3459
3460 static int opt_recording_timestamp(OptionsContext *o, const char *opt, const char *arg)
3461 {
3462     char buf[128];
3463     int64_t recording_timestamp = parse_time_or_die(opt, arg, 0) / 1E6;
3464     struct tm time = *gmtime((time_t*)&recording_timestamp);
3465     strftime(buf, sizeof(buf), "creation_time=%FT%T%z", &time);
3466     parse_option(o, "metadata", buf, options);
3467
3468     av_log(NULL, AV_LOG_WARNING, "%s is deprecated, set the 'creation_time' metadata "
3469                                  "tag instead.\n", opt);
3470     return 0;
3471 }
3472
3473 static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
3474 {
3475     const char *codec_string = encoder ? "encoder" : "decoder";
3476     AVCodec *codec;
3477
3478     codec = encoder ?
3479         avcodec_find_encoder_by_name(name) :
3480         avcodec_find_decoder_by_name(name);
3481     if (!codec) {
3482         av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
3483         exit_program(1);
3484     }
3485     if (codec->type != type) {
3486         av_log(NULL, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
3487         exit_program(1);
3488     }
3489     return codec;
3490 }
3491
3492 static AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVStream *st)
3493 {
3494     char *codec_name = NULL;
3495
3496     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
3497     if (codec_name) {
3498         AVCodec *codec = find_codec_or_die(codec_name, st->codec->codec_type, 0);
3499         st->codec->codec_id = codec->id;
3500         return codec;
3501     } else
3502         return avcodec_find_decoder(st->codec->codec_id);
3503 }
3504
3505 /**
3506  * Add all the streams from the given input file to the global
3507  * list of input streams.
3508  */
3509 static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
3510 {
3511     int i;
3512     char *next, *codec_tag = NULL;
3513
3514     for (i = 0; i < ic->nb_streams; i++) {
3515         AVStream *st = ic->streams[i];
3516         AVCodecContext *dec = st->codec;
3517         InputStream *ist;
3518
3519         input_streams = grow_array(input_streams, sizeof(*input_streams), &nb_input_streams, nb_input_streams + 1);
3520         ist = &input_streams[nb_input_streams - 1];
3521         ist->st = st;
3522         ist->file_index = nb_input_files;
3523         ist->discard = 1;
3524         ist->opts = filter_codec_opts(codec_opts, choose_decoder(o, ic, st), ic, st);
3525
3526         ist->ts_scale = 1.0;
3527         MATCH_PER_STREAM_OPT(ts_scale, dbl, ist->ts_scale, ic, st);
3528
3529         MATCH_PER_STREAM_OPT(codec_tags, str, codec_tag, ic, st);
3530         if (codec_tag) {
3531             uint32_t tag = strtol(codec_tag, &next, 0);
3532             if (*next)
3533                 tag = AV_RL32(codec_tag);
3534             st->codec->codec_tag = tag;
3535         }
3536
3537         ist->dec = choose_decoder(o, ic, st);
3538
3539         switch (dec->codec_type) {
3540         case AVMEDIA_TYPE_AUDIO:
3541             if (!ist->dec)
3542                 ist->dec = avcodec_find_decoder(dec->codec_id);
3543             if (o->audio_disable)
3544                 st->discard = AVDISCARD_ALL;
3545             break;
3546         case AVMEDIA_TYPE_VIDEO:
3547             if(!ist->dec)
3548                 ist->dec = avcodec_find_decoder(dec->codec_id);
3549             if (dec->lowres) {
3550                 dec->flags |= CODEC_FLAG_EMU_EDGE;
3551             }
3552
3553             if (o->video_disable)
3554                 st->discard = AVDISCARD_ALL;
3555             else if (video_discard)
3556                 st->discard = video_discard;
3557             break;
3558         case AVMEDIA_TYPE_DATA:
3559             if (o->data_disable)
3560                 st->discard= AVDISCARD_ALL;
3561             break;
3562         case AVMEDIA_TYPE_SUBTITLE:
3563             if(!ist->dec)
3564                 ist->dec = avcodec_find_decoder(dec->codec_id);
3565             if(o->subtitle_disable)
3566                 st->discard = AVDISCARD_ALL;
3567             break;
3568         case AVMEDIA_TYPE_ATTACHMENT:
3569         case AVMEDIA_TYPE_UNKNOWN:
3570             break;
3571         default:
3572             abort();
3573         }
3574     }
3575 }
3576
3577 static void assert_file_overwrite(const char *filename)
3578 {
3579     if ((!file_overwrite || no_file_overwrite) &&
3580         (strchr(filename, ':') == NULL || filename[1] == ':' ||
3581          av_strstart(filename, "file:", NULL))) {
3582         if (avio_check(filename, 0) == 0) {
3583             if (!using_stdin && (!no_file_overwrite || file_overwrite)) {
3584                 fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
3585                 fflush(stderr);
3586                 term_exit();
3587                 signal(SIGINT, SIG_DFL);
3588                 if (!read_yesno()) {
3589                     av_log(0, AV_LOG_FATAL, "Not overwriting - exiting\n");
3590                     exit_program(1);
3591                 }
3592                 term_init();
3593             }
3594             else {
3595                 av_log(0, AV_LOG_FATAL, "File '%s' already exists. Exiting.\n", filename);
3596                 exit_program(1);
3597             }
3598         }
3599     }
3600 }
3601
3602 static void dump_attachment(AVStream *st, const char *filename)
3603 {
3604     int ret;
3605     AVIOContext *out = NULL;
3606     AVDictionaryEntry *e;
3607
3608     if (!st->codec->extradata_size) {
3609         av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
3610                nb_input_files - 1, st->index);
3611         return;
3612     }
3613     if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
3614         filename = e->value;
3615     if (!*filename) {
3616         av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
3617                "in stream #%d:%d.\n", nb_input_files - 1, st->index);
3618         exit_program(1);
3619     }
3620
3621     assert_file_overwrite(filename);
3622
3623     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
3624         av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
3625                filename);
3626         exit_program(1);
3627     }
3628
3629     avio_write(out, st->codec->extradata, st->codec->extradata_size);
3630     avio_flush(out);
3631     avio_close(out);
3632 }
3633
3634 static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
3635 {
3636     AVFormatContext *ic;
3637     AVInputFormat *file_iformat = NULL;
3638     int err, i, ret;
3639     int64_t timestamp;
3640     uint8_t buf[128];
3641     AVDictionary **opts;
3642     int orig_nb_streams;                     // number of streams before avformat_find_stream_info
3643
3644     if (o->format) {
3645         if (!(file_iformat = av_find_input_format(o->format))) {
3646             av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
3647             exit_program(1);
3648         }
3649     }
3650
3651     if (!strcmp(filename, "-"))
3652         filename = "pipe:";
3653
3654     using_stdin |= !strncmp(filename, "pipe:", 5) ||
3655                     !strcmp(filename, "/dev/stdin");
3656
3657     /* get default parameters from command line */
3658     ic = avformat_alloc_context();
3659     if (!ic) {
3660         print_error(filename, AVERROR(ENOMEM));
3661         exit_program(1);
3662     }