ffmpeg: reintroducing check_recording_time()
[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 "libswresample/swresample.h"
39 #include "libavutil/opt.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 "libavutil/timestamp.h"
53 #include "libavutil/bprint.h"
54 #include "libavformat/os_support.h"
55
56 #include "libavformat/ffm.h" // not public API
57
58 # include "libavfilter/avcodec.h"
59 # include "libavfilter/avfilter.h"
60 # include "libavfilter/avfiltergraph.h"
61 # include "libavfilter/buffersrc.h"
62 # include "libavfilter/buffersink.h"
63
64 #if HAVE_SYS_RESOURCE_H
65 #include <sys/types.h>
66 #include <sys/time.h>
67 #include <sys/resource.h>
68 #elif HAVE_GETPROCESSTIMES
69 #include <windows.h>
70 #endif
71 #if HAVE_GETPROCESSMEMORYINFO
72 #include <windows.h>
73 #include <psapi.h>
74 #endif
75
76 #if HAVE_SYS_SELECT_H
77 #include <sys/select.h>
78 #endif
79
80 #if HAVE_TERMIOS_H
81 #include <fcntl.h>
82 #include <sys/ioctl.h>
83 #include <sys/time.h>
84 #include <termios.h>
85 #elif HAVE_KBHIT
86 #include <conio.h>
87 #endif
88 #include <time.h>
89
90 #include "cmdutils.h"
91
92 #include "libavutil/avassert.h"
93
94 #define VSYNC_AUTO       -1
95 #define VSYNC_PASSTHROUGH 0
96 #define VSYNC_CFR         1
97 #define VSYNC_VFR         2
98 #define VSYNC_DROP        0xff
99
100 #define SINKA
101
102 const char program_name[] = "ffmpeg";
103 const int program_birth_year = 2000;
104
105 /* select an input stream for an output stream */
106 typedef struct StreamMap {
107     int disabled;           /** 1 is this mapping is disabled by a negative map */
108     int file_index;
109     int stream_index;
110     int sync_file_index;
111     int sync_stream_index;
112     char *linklabel;       /** name of an output link, for mapping lavfi outputs */
113 } StreamMap;
114
115 typedef struct {
116     int  file_idx,  stream_idx,  channel_idx; // input
117     int ofile_idx, ostream_idx;               // output
118 } AudioChannelMap;
119
120 static const OptionDef options[];
121
122 #define MAX_STREAMS 1024    /* arbitrary sanity check value */
123
124 static int frame_bits_per_raw_sample = 0;
125 static int video_discard = 0;
126 static int same_quant = 0;
127 static int do_deinterlace = 0;
128 static int intra_dc_precision = 8;
129 static int qp_hist = 0;
130 static int intra_only = 0;
131 static const char *video_codec_name    = NULL;
132 static const char *audio_codec_name    = NULL;
133 static const char *subtitle_codec_name = NULL;
134
135 static int file_overwrite = 0;
136 static int no_file_overwrite = 0;
137 static int do_benchmark = 0;
138 static int do_benchmark_all = 0;
139 static int do_hex_dump = 0;
140 static int do_pkt_dump = 0;
141 static int do_psnr = 0;
142 static int do_pass = 0;
143 static const char *pass_logfilename_prefix;
144 static int video_sync_method = VSYNC_AUTO;
145 static int audio_sync_method = 0;
146 static float audio_drift_threshold = 0.1;
147 static int copy_ts = 0;
148 static int copy_tb = -1;
149 static int opt_shortest = 0;
150 static char *vstats_filename;
151 static FILE *vstats_file;
152
153 static int audio_volume = 256;
154
155 static int exit_on_error = 0;
156 static int using_stdin = 0;
157 static int run_as_daemon  = 0;
158 static volatile int received_nb_signals = 0;
159 static int64_t video_size = 0;
160 static int64_t audio_size = 0;
161 static int64_t extra_size = 0;
162 static int nb_frames_dup = 0;
163 static int nb_frames_drop = 0;
164 static int input_sync;
165
166 static float dts_delta_threshold = 10;
167 static float dts_error_threshold = 3600*30;
168
169 static int print_stats = 1;
170 static int debug_ts = 0;
171 static int current_time;
172
173 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
174
175 typedef struct InputFilter {
176     AVFilterContext    *filter;
177     struct InputStream *ist;
178     struct FilterGraph *graph;
179 } InputFilter;
180
181 typedef struct OutputFilter {
182     AVFilterContext     *filter;
183     struct OutputStream *ost;
184     struct FilterGraph  *graph;
185
186     /* temporary storage until stream maps are processed */
187     AVFilterInOut       *out_tmp;
188 } OutputFilter;
189
190 typedef struct FilterGraph {
191     int            index;
192     const char    *graph_desc;
193
194     AVFilterGraph *graph;
195
196     InputFilter   **inputs;
197     int          nb_inputs;
198     OutputFilter **outputs;
199     int         nb_outputs;
200 } FilterGraph;
201
202 typedef struct FrameBuffer {
203     uint8_t *base[4];
204     uint8_t *data[4];
205     int  linesize[4];
206
207     int h, w;
208     enum PixelFormat pix_fmt;
209
210     int refcount;
211     struct InputStream *ist;
212     struct FrameBuffer *next;
213 } FrameBuffer;
214
215 typedef struct InputStream {
216     int file_index;
217     AVStream *st;
218     int discard;             /* true if stream data should be discarded */
219     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
220     AVCodec *dec;
221     AVFrame *decoded_frame;
222
223     int64_t       start;     /* time when read started */
224     /* predicted dts of the next packet read for this stream or (when there are
225      * several frames in a packet) of the next frame in current packet */
226     int64_t       next_dts;
227     /* dts of the last packet read for this stream */
228     int64_t       dts;
229
230     int64_t       next_pts;  /* synthetic pts for the next decode frame */
231     int64_t       pts;       /* current pts of the decoded frame */
232     double ts_scale;
233     int is_start;            /* is 1 at the start and after a discontinuity */
234     int saw_first_ts;
235     int showed_multi_packet_warning;
236     AVDictionary *opts;
237
238     int resample_height;
239     int resample_width;
240     int resample_pix_fmt;
241
242     int      resample_sample_fmt;
243     int      resample_sample_rate;
244     int      resample_channels;
245     uint64_t resample_channel_layout;
246
247     /* a pool of free buffers for decoded data */
248     FrameBuffer *buffer_pool;
249     int dr1;
250
251     /* decoded data from this stream goes into all those filters
252      * currently video and audio only */
253     InputFilter **filters;
254     int        nb_filters;
255 } InputStream;
256
257 typedef struct InputFile {
258     AVFormatContext *ctx;
259     int eof_reached;      /* true if eof reached */
260     int ist_index;        /* index of first stream in input_streams */
261     int buffer_size;      /* current total buffer size */
262     int64_t ts_offset;
263     int nb_streams;       /* number of stream that ffmpeg is aware of; may be different
264                              from ctx.nb_streams if new streams appear during av_read_frame() */
265     int rate_emu;
266 } InputFile;
267
268 typedef struct OutputStream {
269     int file_index;          /* file index */
270     int index;               /* stream index in the output file */
271     int source_index;        /* InputStream index */
272     AVStream *st;            /* stream in the output file */
273     int encoding_needed;     /* true if encoding needed for this stream */
274     int frame_number;
275     /* input pts and corresponding output pts
276        for A/V sync */
277     struct InputStream *sync_ist; /* input stream to sync against */
278     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
279     /* pts of the first frame encoded for this stream, used for limiting
280      * recording time */
281     int64_t first_pts;
282     AVBitStreamFilterContext *bitstream_filters;
283     AVCodec *enc;
284     int64_t max_frames;
285     AVFrame *filtered_frame;
286
287     /* video only */
288     AVRational frame_rate;
289     int force_fps;
290     int top_field_first;
291
292     float frame_aspect_ratio;
293     float last_quality;
294
295     /* forced key frames */
296     int64_t *forced_kf_pts;
297     int forced_kf_count;
298     int forced_kf_index;
299
300     /* audio only */
301     int audio_channels_map[SWR_CH_MAX];  /* list of the channels id to pick from the source stream */
302     int audio_channels_mapped;           /* number of channels in audio_channels_map */
303
304     FILE *logfile;
305
306     OutputFilter *filter;
307     char *avfilter;
308
309     int64_t sws_flags;
310     int64_t swr_dither_method;
311     double swr_dither_scale;
312     AVDictionary *opts;
313     int is_past_recording_time;
314     int stream_copy;
315     const char *attachment_filename;
316     int copy_initial_nonkeyframes;
317
318     int keep_pix_fmt;
319 } OutputStream;
320
321
322 #if HAVE_TERMIOS_H
323
324 /* init terminal so that we can grab keys */
325 static struct termios oldtty;
326 static int restore_tty;
327 #endif
328
329 typedef struct OutputFile {
330     AVFormatContext *ctx;
331     AVDictionary *opts;
332     int ost_index;       /* index of the first stream in output_streams */
333     int64_t recording_time; /* desired length of the resulting file in microseconds */
334     int64_t start_time;     /* start time in microseconds */
335     uint64_t limit_filesize; /* filesize limit expressed in bytes */
336 } OutputFile;
337
338 static InputStream **input_streams = NULL;
339 static int        nb_input_streams = 0;
340 static InputFile   **input_files   = NULL;
341 static int        nb_input_files   = 0;
342
343 static OutputStream **output_streams = NULL;
344 static int         nb_output_streams = 0;
345 static OutputFile   **output_files   = NULL;
346 static int         nb_output_files   = 0;
347
348 static FilterGraph **filtergraphs;
349 int               nb_filtergraphs;
350
351 typedef struct OptionsContext {
352     /* input/output options */
353     int64_t start_time;
354     const char *format;
355
356     SpecifierOpt *codec_names;
357     int        nb_codec_names;
358     SpecifierOpt *audio_channels;
359     int        nb_audio_channels;
360     SpecifierOpt *audio_sample_rate;
361     int        nb_audio_sample_rate;
362     SpecifierOpt *frame_rates;
363     int        nb_frame_rates;
364     SpecifierOpt *frame_sizes;
365     int        nb_frame_sizes;
366     SpecifierOpt *frame_pix_fmts;
367     int        nb_frame_pix_fmts;
368
369     /* input options */
370     int64_t input_ts_offset;
371     int rate_emu;
372
373     SpecifierOpt *ts_scale;
374     int        nb_ts_scale;
375     SpecifierOpt *dump_attachment;
376     int        nb_dump_attachment;
377
378     /* output options */
379     StreamMap *stream_maps;
380     int     nb_stream_maps;
381     AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
382     int           nb_audio_channel_maps; /* number of (valid) -map_channel settings */
383     int metadata_global_manual;
384     int metadata_streams_manual;
385     int metadata_chapters_manual;
386     const char **attachments;
387     int       nb_attachments;
388
389     int chapters_input_file;
390
391     int64_t recording_time;
392     uint64_t limit_filesize;
393     float mux_preload;
394     float mux_max_delay;
395
396     int video_disable;
397     int audio_disable;
398     int subtitle_disable;
399     int data_disable;
400
401     /* indexed by output file stream index */
402     int   *streamid_map;
403     int nb_streamid_map;
404
405     SpecifierOpt *metadata;
406     int        nb_metadata;
407     SpecifierOpt *max_frames;
408     int        nb_max_frames;
409     SpecifierOpt *bitstream_filters;
410     int        nb_bitstream_filters;
411     SpecifierOpt *codec_tags;
412     int        nb_codec_tags;
413     SpecifierOpt *sample_fmts;
414     int        nb_sample_fmts;
415     SpecifierOpt *qscale;
416     int        nb_qscale;
417     SpecifierOpt *forced_key_frames;
418     int        nb_forced_key_frames;
419     SpecifierOpt *force_fps;
420     int        nb_force_fps;
421     SpecifierOpt *frame_aspect_ratios;
422     int        nb_frame_aspect_ratios;
423     SpecifierOpt *rc_overrides;
424     int        nb_rc_overrides;
425     SpecifierOpt *intra_matrices;
426     int        nb_intra_matrices;
427     SpecifierOpt *inter_matrices;
428     int        nb_inter_matrices;
429     SpecifierOpt *top_field_first;
430     int        nb_top_field_first;
431     SpecifierOpt *metadata_map;
432     int        nb_metadata_map;
433     SpecifierOpt *presets;
434     int        nb_presets;
435     SpecifierOpt *copy_initial_nonkeyframes;
436     int        nb_copy_initial_nonkeyframes;
437     SpecifierOpt *filters;
438     int        nb_filters;
439 } OptionsContext;
440
441 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
442 {\
443     int i, ret;\
444     for (i = 0; i < o->nb_ ## name; i++) {\
445         char *spec = o->name[i].specifier;\
446         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
447             outvar = o->name[i].u.type;\
448         else if (ret < 0)\
449             exit_program(1);\
450     }\
451 }
452
453 static int64_t getutime(void)
454 {
455 #if HAVE_GETRUSAGE
456     struct rusage rusage;
457
458     getrusage(RUSAGE_SELF, &rusage);
459     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
460 #elif HAVE_GETPROCESSTIMES
461     HANDLE proc;
462     FILETIME c, e, k, u;
463     proc = GetCurrentProcess();
464     GetProcessTimes(proc, &c, &e, &k, &u);
465     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
466 #else
467     return av_gettime();
468 #endif
469 }
470
471 static void update_benchmark(const char *fmt, ...)
472 {
473     if (do_benchmark_all) {
474         int64_t t = getutime();
475         va_list va;
476         char buf[1024];
477
478         if (fmt) {
479             va_start(va, fmt);
480             vsnprintf(buf, sizeof(buf), fmt, va);
481             va_end(va);
482             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
483         }
484         current_time = t;
485     }
486 }
487
488 static void reset_options(OptionsContext *o, int is_input)
489 {
490     const OptionDef *po = options;
491     OptionsContext bak= *o;
492     int i;
493
494     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
495     while (po->name) {
496         void *dst = (uint8_t*)o + po->u.off;
497
498         if (po->flags & OPT_SPEC) {
499             SpecifierOpt **so = dst;
500             int i, *count = (int*)(so + 1);
501             for (i = 0; i < *count; i++) {
502                 av_freep(&(*so)[i].specifier);
503                 if (po->flags & OPT_STRING)
504                     av_freep(&(*so)[i].u.str);
505             }
506             av_freep(so);
507             *count = 0;
508         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
509             av_freep(dst);
510         po++;
511     }
512
513     for (i = 0; i < o->nb_stream_maps; i++)
514         av_freep(&o->stream_maps[i].linklabel);
515     av_freep(&o->stream_maps);
516     av_freep(&o->audio_channel_maps);
517     av_freep(&o->streamid_map);
518
519     memset(o, 0, sizeof(*o));
520
521     if(is_input) o->recording_time = bak.recording_time;
522     else         o->recording_time = INT64_MAX;
523     o->mux_max_delay  = 0.7;
524     o->limit_filesize = UINT64_MAX;
525     o->chapters_input_file = INT_MAX;
526
527     uninit_opts();
528     init_opts();
529 }
530
531 static int alloc_buffer(InputStream *ist, AVCodecContext *s, FrameBuffer **pbuf)
532 {
533     FrameBuffer  *buf = av_mallocz(sizeof(*buf));
534     int i, ret;
535     const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
536     int h_chroma_shift, v_chroma_shift;
537     int edge = 32; // XXX should be avcodec_get_edge_width(), but that fails on svq1
538     int w = s->width, h = s->height;
539
540     if (!buf)
541         return AVERROR(ENOMEM);
542
543     avcodec_align_dimensions(s, &w, &h);
544
545     if (!(s->flags & CODEC_FLAG_EMU_EDGE)) {
546         w += 2*edge;
547         h += 2*edge;
548     }
549
550     if ((ret = av_image_alloc(buf->base, buf->linesize, w, h,
551                               s->pix_fmt, 32)) < 0) {
552         av_freep(&buf);
553         return ret;
554     }
555     /* XXX this shouldn't be needed, but some tests break without this line
556      * those decoders are buggy and need to be fixed.
557      * the following tests fail:
558      * cdgraphics, ansi, aasc, fraps-v1, qtrle-1bit
559      */
560     memset(buf->base[0], 128, ret);
561
562     avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
563     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
564         const int h_shift = i==0 ? 0 : h_chroma_shift;
565         const int v_shift = i==0 ? 0 : v_chroma_shift;
566         if ((s->flags & CODEC_FLAG_EMU_EDGE) || !buf->linesize[1] || !buf->base[i])
567             buf->data[i] = buf->base[i];
568         else
569             buf->data[i] = buf->base[i] +
570                            FFALIGN((buf->linesize[i]*edge >> v_shift) +
571                                    (pixel_size*edge >> h_shift), 32);
572     }
573     buf->w       = s->width;
574     buf->h       = s->height;
575     buf->pix_fmt = s->pix_fmt;
576     buf->ist     = ist;
577
578     *pbuf = buf;
579     return 0;
580 }
581
582 static void free_buffer_pool(InputStream *ist)
583 {
584     FrameBuffer *buf = ist->buffer_pool;
585     while (buf) {
586         ist->buffer_pool = buf->next;
587         av_freep(&buf->base[0]);
588         av_free(buf);
589         buf = ist->buffer_pool;
590     }
591 }
592
593 static void unref_buffer(InputStream *ist, FrameBuffer *buf)
594 {
595     av_assert0(buf->refcount > 0);
596     buf->refcount--;
597     if (!buf->refcount) {
598         FrameBuffer *tmp;
599         for(tmp= ist->buffer_pool; tmp; tmp= tmp->next)
600             av_assert1(tmp != buf);
601         buf->next = ist->buffer_pool;
602         ist->buffer_pool = buf;
603     }
604 }
605
606 static int codec_get_buffer(AVCodecContext *s, AVFrame *frame)
607 {
608     InputStream *ist = s->opaque;
609     FrameBuffer *buf;
610     int ret, i;
611
612     if(av_image_check_size(s->width, s->height, 0, s) || s->pix_fmt<0)
613         return -1;
614
615     if (!ist->buffer_pool && (ret = alloc_buffer(ist, s, &ist->buffer_pool)) < 0)
616         return ret;
617
618     buf              = ist->buffer_pool;
619     ist->buffer_pool = buf->next;
620     buf->next        = NULL;
621     if (buf->w != s->width || buf->h != s->height || buf->pix_fmt != s->pix_fmt) {
622         av_freep(&buf->base[0]);
623         av_free(buf);
624         if ((ret = alloc_buffer(ist, s, &buf)) < 0)
625             return ret;
626     }
627     av_assert0(!buf->refcount);
628     buf->refcount++;
629
630     frame->opaque        = buf;
631     frame->type          = FF_BUFFER_TYPE_USER;
632     frame->extended_data = frame->data;
633     frame->pkt_pts       = s->pkt ? s->pkt->pts : AV_NOPTS_VALUE;
634     frame->width         = buf->w;
635     frame->height        = buf->h;
636     frame->format        = buf->pix_fmt;
637     frame->sample_aspect_ratio = s->sample_aspect_ratio;
638
639     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
640         frame->base[i]     = buf->base[i];  // XXX h264.c uses base though it shouldn't
641         frame->data[i]     = buf->data[i];
642         frame->linesize[i] = buf->linesize[i];
643     }
644
645     return 0;
646 }
647
648 static void codec_release_buffer(AVCodecContext *s, AVFrame *frame)
649 {
650     InputStream *ist = s->opaque;
651     FrameBuffer *buf = frame->opaque;
652     int i;
653
654     if(frame->type!=FF_BUFFER_TYPE_USER)
655         return avcodec_default_release_buffer(s, frame);
656
657     for (i = 0; i < FF_ARRAY_ELEMS(frame->data); i++)
658         frame->data[i] = NULL;
659
660     unref_buffer(ist, buf);
661 }
662
663 static void filter_release_buffer(AVFilterBuffer *fb)
664 {
665     FrameBuffer *buf = fb->priv;
666     av_free(fb);
667     unref_buffer(buf->ist, buf);
668 }
669
670 static enum PixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum PixelFormat target)
671 {
672     if (codec && codec->pix_fmts) {
673         const enum PixelFormat *p = codec->pix_fmts;
674         int has_alpha= av_pix_fmt_descriptors[target].nb_components % 2 == 0;
675         enum PixelFormat best= PIX_FMT_NONE;
676         if (st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
677             if (st->codec->codec_id == CODEC_ID_MJPEG) {
678                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
679             } else if (st->codec->codec_id == CODEC_ID_LJPEG) {
680                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
681                                                  PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
682             }
683         }
684         for (; *p != PIX_FMT_NONE; p++) {
685             best= avcodec_find_best_pix_fmt2(best, *p, target, has_alpha, NULL);
686             if (*p == target)
687                 break;
688         }
689         if (*p == PIX_FMT_NONE) {
690             if (target != PIX_FMT_NONE)
691                 av_log(NULL, AV_LOG_WARNING,
692                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
693                        av_pix_fmt_descriptors[target].name,
694                        codec->name,
695                        av_pix_fmt_descriptors[best].name);
696             return best;
697         }
698     }
699     return target;
700 }
701
702 static char *choose_pix_fmts(OutputStream *ost)
703 {
704      if (ost->keep_pix_fmt) {
705         if (ost->filter)
706             avfilter_graph_set_auto_convert(ost->filter->graph->graph,
707                                             AVFILTER_AUTO_CONVERT_NONE);
708         if (ost->st->codec->pix_fmt == PIX_FMT_NONE)
709             return NULL;
710         return av_strdup(av_get_pix_fmt_name(ost->st->codec->pix_fmt));
711     }
712     if (ost->st->codec->pix_fmt != PIX_FMT_NONE) {
713         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc, ost->st->codec->pix_fmt)));
714     } else if (ost->enc->pix_fmts) {
715         const enum PixelFormat *p;
716         AVIOContext *s = NULL;
717         uint8_t *ret;
718         int len;
719
720         if (avio_open_dyn_buf(&s) < 0)
721             exit_program(1);
722
723         p = ost->enc->pix_fmts;
724         if (ost->st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
725             if (ost->st->codec->codec_id == CODEC_ID_MJPEG) {
726                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
727             } else if (ost->st->codec->codec_id == CODEC_ID_LJPEG) {
728                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
729                                                     PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
730             }
731         }
732
733         for (; *p != PIX_FMT_NONE; p++) {
734             const char *name = av_get_pix_fmt_name(*p);
735             avio_printf(s, "%s:", name);
736         }
737         len = avio_close_dyn_buf(s, &ret);
738         ret[len - 1] = 0;
739         return ret;
740     } else
741         return NULL;
742 }
743
744 /**
745  * Define a function for building a string containing a list of
746  * allowed formats,
747  */
748 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator) \
749 static char *choose_ ## var ## s(OutputStream *ost)                             \
750 {                                                                               \
751     if (ost->st->codec->var != none) {                                          \
752         get_name(ost->st->codec->var);                                          \
753         return av_strdup(name);                                                 \
754     } else if (ost->enc->supported_list) {                                      \
755         const type *p;                                                          \
756         AVIOContext *s = NULL;                                                  \
757         uint8_t *ret;                                                           \
758         int len;                                                                \
759                                                                                 \
760         if (avio_open_dyn_buf(&s) < 0)                                          \
761             exit_program(1);                                                    \
762                                                                                 \
763         for (p = ost->enc->supported_list; *p != none; p++) {                   \
764             get_name(*p);                                                       \
765             avio_printf(s, "%s" separator, name);                               \
766         }                                                                       \
767         len = avio_close_dyn_buf(s, &ret);                                      \
768         ret[len - 1] = 0;                                                       \
769         return ret;                                                             \
770     } else                                                                      \
771         return NULL;                                                            \
772 }
773
774 #define GET_PIX_FMT_NAME(pix_fmt)\
775     const char *name = av_get_pix_fmt_name(pix_fmt);
776
777 // DEF_CHOOSE_FORMAT(enum PixelFormat, pix_fmt, pix_fmts, PIX_FMT_NONE,
778 //                   GET_PIX_FMT_NAME, ":")
779
780 #define GET_SAMPLE_FMT_NAME(sample_fmt)\
781     const char *name = av_get_sample_fmt_name(sample_fmt)
782
783 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
784                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME, ",")
785
786 #define GET_SAMPLE_RATE_NAME(rate)\
787     char name[16];\
788     snprintf(name, sizeof(name), "%d", rate);
789
790 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
791                   GET_SAMPLE_RATE_NAME, ",")
792
793 #define GET_CH_LAYOUT_NAME(ch_layout)\
794     char name[16];\
795     snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
796
797 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
798                   GET_CH_LAYOUT_NAME, ",")
799
800 static int configure_audio_filters(FilterGraph *fg, AVFilterContext **in_filter,
801                                    AVFilterContext **out_filter)
802 {
803     InputStream  *ist = fg->inputs[0]->ist;
804     OutputStream *ost = fg->outputs[0]->ost;
805     AVCodecContext *codec  = ost->st->codec;
806     AVCodecContext *icodec = ist->st->codec;
807     char *sample_fmts, *sample_rates, *channel_layouts;
808     char args[256];
809     int ret;
810
811     avfilter_graph_free(&fg->graph);
812     if (!(fg->graph = avfilter_graph_alloc()))
813         return AVERROR(ENOMEM);
814
815     snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s:"
816              "channel_layout=0x%"PRIx64, ist->st->time_base.num,
817              ist->st->time_base.den, icodec->sample_rate,
818              av_get_sample_fmt_name(icodec->sample_fmt), icodec->channel_layout);
819     ret = avfilter_graph_create_filter(&fg->inputs[0]->filter,
820                                        avfilter_get_by_name("abuffer"),
821                                        "src", args, NULL, fg->graph);
822     if (ret < 0)
823         return ret;
824
825     ret = avfilter_graph_create_filter(&fg->outputs[0]->filter,
826                                        avfilter_get_by_name("abuffersink_old"),
827                                        "out", NULL, NULL, fg->graph);
828     if (ret < 0)
829         return ret;
830
831     *in_filter  = fg->inputs[0]->filter;
832     *out_filter = fg->outputs[0]->filter;
833
834     if (codec->channels && !codec->channel_layout)
835         codec->channel_layout = av_get_default_channel_layout(codec->channels);
836
837     sample_fmts     = choose_sample_fmts(ost);
838     sample_rates    = choose_sample_rates(ost);
839     channel_layouts = choose_channel_layouts(ost);
840     if (sample_fmts || sample_rates || channel_layouts) {
841         AVFilterContext *format;
842         char args[256];
843         int len = 0;
844
845         if (sample_fmts)
846             len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
847                             sample_fmts);
848         if (sample_rates)
849             len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
850                             sample_rates);
851         if (channel_layouts)
852             len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
853                             channel_layouts);
854         args[len - 1] = 0;
855
856         av_freep(&sample_fmts);
857         av_freep(&sample_rates);
858         av_freep(&channel_layouts);
859
860         ret = avfilter_graph_create_filter(&format,
861                                            avfilter_get_by_name("aformat"),
862                                            "aformat", args, NULL, fg->graph);
863         if (ret < 0)
864             return ret;
865
866         ret = avfilter_link(format, 0, fg->outputs[0]->filter, 0);
867         if (ret < 0)
868             return ret;
869
870         *out_filter = format;
871     }
872
873     if (audio_sync_method > 0) {
874         AVFilterContext *aswr;
875         char args[256] = {0};
876
877         av_strlcatf(args, sizeof(args), "min_comp=0.001:min_hard_comp=%f", audio_drift_threshold);
878
879         if (audio_sync_method > 1)
880             av_strlcatf(args, sizeof(args), ":max_soft_comp=%f", audio_sync_method/(double)icodec->sample_rate);
881
882         av_log(NULL, AV_LOG_INFO, "-async %d is forwarded to lavfi similarly to -af aresample=%s\n", audio_sync_method, args);
883
884         ret = avfilter_graph_create_filter(&aswr, avfilter_get_by_name("aresample"),
885                                            "aresample", args, NULL, fg->graph);
886         if (ret < 0)
887             return ret;
888
889         ret = avfilter_link(*in_filter, 0, aswr, 0);
890         if (ret < 0)
891             return ret;
892
893         *in_filter = aswr;
894     }
895
896 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do {                 \
897     AVFilterContext *filt_ctx;                                              \
898                                                                             \
899     av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi "            \
900            "similarly to -af " filter_name "=%s.\n", arg);                  \
901                                                                             \
902     ret = avfilter_graph_create_filter(&filt_ctx,                           \
903                                        avfilter_get_by_name(filter_name),   \
904                                        filter_name, arg, NULL, fg->graph);  \
905     if (ret < 0)                                                            \
906         return ret;                                                         \
907                                                                             \
908     ret = avfilter_link(*in_filter, 0, filt_ctx, 0);                        \
909     if (ret < 0)                                                            \
910         return ret;                                                         \
911                                                                             \
912     *in_filter = filt_ctx;                                                  \
913 } while (0)
914
915     if (ost->audio_channels_mapped) {
916         int i;
917         AVBPrint pan_buf;
918
919         av_bprint_init(&pan_buf, 256, 8192);
920         av_bprintf(&pan_buf, "0x%"PRIx64,
921                    av_get_default_channel_layout(ost->audio_channels_mapped));
922         for (i = 0; i < ost->audio_channels_mapped; i++)
923             if (ost->audio_channels_map[i] != -1)
924                 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
925
926         AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
927         av_bprint_finalize(&pan_buf, NULL);
928     }
929
930     if (audio_volume != 256) {
931         char args[256];
932
933         snprintf(args, sizeof(args), "%lf", audio_volume / 256.);
934         AUTO_INSERT_FILTER("-vol", "volume", args);
935     }
936
937     return 0;
938 }
939
940 static int configure_video_filters(FilterGraph *fg, AVFilterContext **in_filter,
941                                    AVFilterContext **out_filter)
942 {
943     InputStream  *ist = fg->inputs[0]->ist;
944     OutputStream *ost = fg->outputs[0]->ost;
945     AVFilterContext *filter;
946     AVCodecContext *codec = ost->st->codec;
947     AVBufferSinkParams *buffersink_params = av_buffersink_params_alloc();
948     char *pix_fmts;
949     AVRational sample_aspect_ratio;
950     char args[255];
951     int ret;
952
953     if (ist->st->sample_aspect_ratio.num) {
954         sample_aspect_ratio = ist->st->sample_aspect_ratio;
955     } else
956         sample_aspect_ratio = ist->st->codec->sample_aspect_ratio;
957
958     snprintf(args, 255, "%d:%d:%d:%d:%d:%d:%d:flags=%d", ist->st->codec->width,
959              ist->st->codec->height, ist->st->codec->pix_fmt,
960              1, AV_TIME_BASE,
961              sample_aspect_ratio.num, sample_aspect_ratio.den,
962              SWS_BILINEAR + ((ist->st->codec->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
963
964     ret = avfilter_graph_create_filter(&fg->inputs[0]->filter,
965                                        avfilter_get_by_name("buffer"),
966                                        "src", args, NULL, fg->graph);
967     if (ret < 0)
968         return ret;
969
970 #if FF_API_OLD_VSINK_API
971     ret = avfilter_graph_create_filter(&fg->outputs[0]->filter,
972                                        avfilter_get_by_name("buffersink"),
973                                        "out", NULL, NULL, fg->graph);
974 #else
975     ret = avfilter_graph_create_filter(&fg->outputs[0]->filter,
976                                        avfilter_get_by_name("buffersink"),
977                                        "out", NULL, buffersink_params, fg->graph);
978 #endif
979     av_freep(&buffersink_params);
980
981     if (ret < 0)
982         return ret;
983     *in_filter  = fg->inputs[0]->filter;
984     *out_filter = fg->outputs[0]->filter;
985
986     if (codec->width || codec->height) {
987         snprintf(args, 255, "%d:%d:flags=0x%X",
988                  codec->width,
989                  codec->height,
990                  (unsigned)ost->sws_flags);
991         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
992                                                 NULL, args, NULL, fg->graph)) < 0)
993             return ret;
994         if ((ret = avfilter_link(*in_filter, 0, filter, 0)) < 0)
995             return ret;
996         *in_filter = filter;
997     }
998
999     if ((pix_fmts = choose_pix_fmts(ost))) {
1000         if ((ret = avfilter_graph_create_filter(&filter,
1001                                                 avfilter_get_by_name("format"),
1002                                                 "format", pix_fmts, NULL,
1003                                                 fg->graph)) < 0)
1004             return ret;
1005         if ((ret = avfilter_link(filter, 0, *out_filter, 0)) < 0)
1006             return ret;
1007
1008         *out_filter = filter;
1009         av_freep(&pix_fmts);
1010     }
1011
1012     snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
1013     fg->graph->scale_sws_opts = av_strdup(args);
1014
1015     return 0;
1016 }
1017
1018 static int configure_simple_filtergraph(FilterGraph *fg)
1019 {
1020     OutputStream *ost = fg->outputs[0]->ost;
1021     AVFilterContext *in_filter, *out_filter;
1022     int ret;
1023
1024     avfilter_graph_free(&fg->graph);
1025     fg->graph = avfilter_graph_alloc();
1026     if (!fg->graph)
1027         return AVERROR(ENOMEM);
1028
1029     switch (ost->st->codec->codec_type) {
1030     case AVMEDIA_TYPE_VIDEO:
1031         ret = configure_video_filters(fg, &in_filter, &out_filter);
1032         break;
1033     case AVMEDIA_TYPE_AUDIO:
1034         ret = configure_audio_filters(fg, &in_filter, &out_filter);
1035         break;
1036     default: av_assert0(0);
1037     }
1038     if (ret < 0)
1039         return ret;
1040
1041     if (ost->avfilter) {
1042         AVFilterInOut *outputs = avfilter_inout_alloc();
1043         AVFilterInOut *inputs  = avfilter_inout_alloc();
1044
1045         outputs->name    = av_strdup("in");
1046         outputs->filter_ctx = in_filter;
1047         outputs->pad_idx = 0;
1048         outputs->next    = NULL;
1049
1050         inputs->name    = av_strdup("out");
1051         inputs->filter_ctx = out_filter;
1052         inputs->pad_idx = 0;
1053         inputs->next    = NULL;
1054
1055         if ((ret = avfilter_graph_parse(fg->graph, ost->avfilter, &inputs, &outputs, NULL)) < 0)
1056             return ret;
1057         av_freep(&ost->avfilter);
1058     } else {
1059         if ((ret = avfilter_link(in_filter, 0, out_filter, 0)) < 0)
1060             return ret;
1061     }
1062
1063     if (ost->keep_pix_fmt)
1064         avfilter_graph_set_auto_convert(fg->graph,
1065                                         AVFILTER_AUTO_CONVERT_NONE);
1066
1067     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1068         return ret;
1069
1070     ost->filter = fg->outputs[0];
1071
1072     return 0;
1073 }
1074
1075 static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
1076 {
1077     FilterGraph *fg = av_mallocz(sizeof(*fg));
1078
1079     if (!fg)
1080         exit_program(1);
1081     fg->index = nb_filtergraphs;
1082
1083     fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
1084                              fg->nb_outputs + 1);
1085     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
1086         exit_program(1);
1087     fg->outputs[0]->ost   = ost;
1088     fg->outputs[0]->graph = fg;
1089
1090     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
1091                             fg->nb_inputs + 1);
1092     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
1093         exit_program(1);
1094     fg->inputs[0]->ist   = ist;
1095     fg->inputs[0]->graph = fg;
1096
1097     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
1098                               &ist->nb_filters, ist->nb_filters + 1);
1099     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
1100
1101     filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
1102                               &nb_filtergraphs, nb_filtergraphs + 1);
1103     filtergraphs[nb_filtergraphs - 1] = fg;
1104
1105     return fg;
1106 }
1107
1108 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
1109 {
1110     InputStream *ist = NULL;
1111     enum AVMediaType type = in->filter_ctx->input_pads[in->pad_idx].type;
1112     int i;
1113
1114     // TODO: support other filter types
1115     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
1116         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
1117                "currently.\n");
1118         exit_program(1);
1119     }
1120
1121     if (in->name) {
1122         AVFormatContext *s;
1123         AVStream       *st = NULL;
1124         char *p;
1125         int file_idx = strtol(in->name, &p, 0);
1126
1127         if (file_idx < 0 || file_idx >= nb_input_files) {
1128             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
1129                    file_idx, fg->graph_desc);
1130             exit_program(1);
1131         }
1132         s = input_files[file_idx]->ctx;
1133
1134         for (i = 0; i < s->nb_streams; i++) {
1135             if (s->streams[i]->codec->codec_type != type)
1136                 continue;
1137             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
1138                 st = s->streams[i];
1139                 break;
1140             }
1141         }
1142         if (!st) {
1143             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
1144                    "matches no streams.\n", p, fg->graph_desc);
1145             exit_program(1);
1146         }
1147         ist = input_streams[input_files[file_idx]->ist_index + st->index];
1148     } else {
1149         /* find the first unused stream of corresponding type */
1150         for (i = 0; i < nb_input_streams; i++) {
1151             ist = input_streams[i];
1152             if (ist->st->codec->codec_type == type && ist->discard)
1153                 break;
1154         }
1155         if (i == nb_input_streams) {
1156             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
1157                    "unlabeled input pad %d on filter %s", in->pad_idx,
1158                    in->filter_ctx->name);
1159             exit_program(1);
1160         }
1161     }
1162     ist->discard         = 0;
1163     ist->decoding_needed = 1;
1164     ist->st->discard = AVDISCARD_NONE;
1165
1166     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
1167                             &fg->nb_inputs, fg->nb_inputs + 1);
1168     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
1169         exit_program(1);
1170     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
1171     fg->inputs[fg->nb_inputs - 1]->graph = fg;
1172
1173     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
1174                               &ist->nb_filters, ist->nb_filters + 1);
1175     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
1176 }
1177
1178 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
1179 {
1180     char *pix_fmts;
1181     AVCodecContext *codec = ofilter->ost->st->codec;
1182     AVFilterContext *last_filter = out->filter_ctx;
1183     int pad_idx = out->pad_idx;
1184     int ret;
1185     AVBufferSinkParams *buffersink_params = av_buffersink_params_alloc();
1186
1187 #if FF_API_OLD_VSINK_API
1188     ret = avfilter_graph_create_filter(&ofilter->filter,
1189                                        avfilter_get_by_name("buffersink"),
1190                                        "out", NULL, NULL, fg->graph);
1191 #else
1192     ret = avfilter_graph_create_filter(&ofilter->filter,
1193                                        avfilter_get_by_name("buffersink"),
1194                                        "out", NULL, buffersink_params, fg->graph);
1195 #endif
1196     av_freep(&buffersink_params);
1197
1198     if (ret < 0)
1199         return ret;
1200
1201     if (codec->width || codec->height) {
1202         char args[255];
1203         AVFilterContext *filter;
1204
1205         snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
1206                  codec->width,
1207                  codec->height,
1208                  (unsigned)ofilter->ost->sws_flags);
1209         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
1210                                                 NULL, args, NULL, fg->graph)) < 0)
1211             return ret;
1212         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
1213             return ret;
1214
1215         last_filter = filter;
1216         pad_idx = 0;
1217     }
1218
1219     if ((pix_fmts = choose_pix_fmts(ofilter->ost))) {
1220         AVFilterContext *filter;
1221         if ((ret = avfilter_graph_create_filter(&filter,
1222                                                 avfilter_get_by_name("format"),
1223                                                 "format", pix_fmts, NULL,
1224                                                 fg->graph)) < 0)
1225             return ret;
1226         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
1227             return ret;
1228
1229         last_filter = filter;
1230         pad_idx     = 0;
1231         av_freep(&pix_fmts);
1232     }
1233
1234     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
1235         return ret;
1236
1237     return 0;
1238 }
1239
1240 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
1241 {
1242     OutputStream *ost = ofilter->ost;
1243     AVCodecContext *codec  = ost->st->codec;
1244     AVFilterContext *last_filter = out->filter_ctx;
1245     int pad_idx = out->pad_idx;
1246     char *sample_fmts, *sample_rates, *channel_layouts;
1247     int ret;
1248
1249     ret = avfilter_graph_create_filter(&ofilter->filter,
1250                                        avfilter_get_by_name("abuffersink"),
1251                                        "out", NULL, NULL, fg->graph);
1252     if (ret < 0)
1253         return ret;
1254
1255     if (codec->channels && !codec->channel_layout)
1256         codec->channel_layout = av_get_default_channel_layout(codec->channels);
1257
1258     sample_fmts     = choose_sample_fmts(ost);
1259     sample_rates    = choose_sample_rates(ost);
1260     channel_layouts = choose_channel_layouts(ost);
1261     if (sample_fmts || sample_rates || channel_layouts) {
1262         AVFilterContext *format;
1263         char args[256];
1264         int len = 0;
1265
1266         if (sample_fmts)
1267             len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
1268                             sample_fmts);
1269         if (sample_rates)
1270             len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
1271                             sample_rates);
1272         if (channel_layouts)
1273             len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
1274                             channel_layouts);
1275         args[len - 1] = 0;
1276
1277         av_freep(&sample_fmts);
1278         av_freep(&sample_rates);
1279         av_freep(&channel_layouts);
1280
1281         ret = avfilter_graph_create_filter(&format,
1282                                            avfilter_get_by_name("aformat"),
1283                                            "aformat", args, NULL, fg->graph);
1284         if (ret < 0)
1285             return ret;
1286
1287         ret = avfilter_link(last_filter, pad_idx, format, 0);
1288         if (ret < 0)
1289             return ret;
1290
1291         last_filter = format;
1292         pad_idx = 0;
1293     }
1294
1295     if (audio_sync_method > 0) {
1296         AVFilterContext *async;
1297         char args[256];
1298         int  len = 0;
1299
1300         av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
1301                "asyncts audio filter instead.\n");
1302
1303         if (audio_sync_method > 1)
1304             len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
1305                             "max_comp=%d:", audio_sync_method);
1306         snprintf(args + len, sizeof(args) - len, "min_delta=%f",
1307                  audio_drift_threshold);
1308
1309         ret = avfilter_graph_create_filter(&async,
1310                                            avfilter_get_by_name("asyncts"),
1311                                            "async", args, NULL, fg->graph);
1312         if (ret < 0)
1313             return ret;
1314
1315         ret = avfilter_link(last_filter, pad_idx, async, 0);
1316         if (ret < 0)
1317             return ret;
1318
1319         last_filter = async;
1320         pad_idx = 0;
1321     }
1322
1323     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
1324         return ret;
1325
1326     return 0;
1327 }
1328
1329 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
1330 {
1331     switch (out->filter_ctx->output_pads[out->pad_idx].type) {
1332     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
1333     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
1334     default: av_assert0(0);
1335     }
1336 }
1337
1338 static int configure_complex_filter(FilterGraph *fg)
1339 {
1340     AVFilterInOut *inputs, *outputs, *cur;
1341     int ret, i, init = !fg->graph;
1342
1343     avfilter_graph_free(&fg->graph);
1344     if (!(fg->graph = avfilter_graph_alloc()))
1345         return AVERROR(ENOMEM);
1346
1347     if ((ret = avfilter_graph_parse2(fg->graph, fg->graph_desc, &inputs, &outputs)) < 0)
1348         return ret;
1349
1350     for (cur = inputs; init && cur; cur = cur->next)
1351         init_input_filter(fg, cur);
1352
1353     for (cur = inputs, i = 0; cur; cur = cur->next, i++) {
1354         InputFilter *ifilter = fg->inputs[i];
1355         InputStream     *ist = ifilter->ist;
1356         AVRational       sar;
1357         AVFilter     *filter;
1358         char            args[255];
1359
1360         switch (cur->filter_ctx->input_pads[cur->pad_idx].type) {
1361         case AVMEDIA_TYPE_VIDEO:
1362             sar = ist->st->sample_aspect_ratio.num ?
1363                   ist->st->sample_aspect_ratio :
1364                   ist->st->codec->sample_aspect_ratio;
1365             snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
1366                      ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
1367                      sar.num, sar.den);
1368             filter = avfilter_get_by_name("buffer");
1369             break;
1370         case AVMEDIA_TYPE_AUDIO:
1371             snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:"
1372                      "sample_fmt=%s:channel_layout=0x%"PRIx64,
1373                      ist->st->time_base.num, ist->st->time_base.den,
1374                      ist->st->codec->sample_rate,
1375                      av_get_sample_fmt_name(ist->st->codec->sample_fmt),
1376                      ist->st->codec->channel_layout);
1377             filter = avfilter_get_by_name("abuffer");
1378             break;
1379         default:
1380             av_assert0(0);
1381         }
1382
1383         if ((ret = avfilter_graph_create_filter(&ifilter->filter,
1384                                                 filter, cur->name,
1385                                                 args, NULL, fg->graph)) < 0)
1386             return ret;
1387         if ((ret = avfilter_link(ifilter->filter, 0,
1388                                  cur->filter_ctx, cur->pad_idx)) < 0)
1389             return ret;
1390     }
1391     avfilter_inout_free(&inputs);
1392
1393     if (!init) {
1394         /* we already know the mappings between lavfi outputs and output streams,
1395          * so we can finish the setup */
1396         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1397             configure_output_filter(fg, fg->outputs[i], cur);
1398         avfilter_inout_free(&outputs);
1399
1400         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1401             return ret;
1402     } else {
1403         /* wait until output mappings are processed */
1404         for (cur = outputs; cur;) {
1405             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
1406                                      &fg->nb_outputs, fg->nb_outputs + 1);
1407             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
1408                 exit_program(1);
1409             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
1410             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
1411             cur = cur->next;
1412             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
1413         }
1414     }
1415
1416     return 0;
1417 }
1418
1419 static int configure_complex_filters(void)
1420 {
1421     int i, ret = 0;
1422
1423     for (i = 0; i < nb_filtergraphs; i++)
1424         if (!filtergraphs[i]->graph &&
1425             (ret = configure_complex_filter(filtergraphs[i])) < 0)
1426             return ret;
1427     return 0;
1428 }
1429
1430 static int configure_filtergraph(FilterGraph *fg)
1431 {
1432     return fg->graph_desc ? configure_complex_filter(fg) :
1433                             configure_simple_filtergraph(fg);
1434 }
1435
1436 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1437 {
1438     int i;
1439     for (i = 0; i < fg->nb_inputs; i++)
1440         if (fg->inputs[i]->ist == ist)
1441             return 1;
1442     return 0;
1443 }
1444
1445 static void term_exit(void)
1446 {
1447     av_log(NULL, AV_LOG_QUIET, "%s", "");
1448 #if HAVE_TERMIOS_H
1449     if(restore_tty)
1450         tcsetattr (0, TCSANOW, &oldtty);
1451 #endif
1452 }
1453
1454 static volatile int received_sigterm = 0;
1455
1456 static void sigterm_handler(int sig)
1457 {
1458     received_sigterm = sig;
1459     received_nb_signals++;
1460     term_exit();
1461     if(received_nb_signals > 3)
1462         exit(123);
1463 }
1464
1465 static void term_init(void)
1466 {
1467 #if HAVE_TERMIOS_H
1468     if(!run_as_daemon){
1469         struct termios tty;
1470
1471         if (tcgetattr (0, &tty) == 0) {
1472             oldtty = tty;
1473             restore_tty = 1;
1474             atexit(term_exit);
1475
1476             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1477                              |INLCR|IGNCR|ICRNL|IXON);
1478             tty.c_oflag |= OPOST;
1479             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1480             tty.c_cflag &= ~(CSIZE|PARENB);
1481             tty.c_cflag |= CS8;
1482             tty.c_cc[VMIN] = 1;
1483             tty.c_cc[VTIME] = 0;
1484
1485             tcsetattr (0, TCSANOW, &tty);
1486         }
1487         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
1488     }
1489 #endif
1490     avformat_network_deinit();
1491
1492     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1493     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1494 #ifdef SIGXCPU
1495     signal(SIGXCPU, sigterm_handler);
1496 #endif
1497 }
1498
1499 /* read a key without blocking */
1500 static int read_key(void)
1501 {
1502     unsigned char ch;
1503 #if HAVE_TERMIOS_H
1504     int n = 1;
1505     struct timeval tv;
1506     fd_set rfds;
1507
1508     FD_ZERO(&rfds);
1509     FD_SET(0, &rfds);
1510     tv.tv_sec = 0;
1511     tv.tv_usec = 0;
1512     n = select(1, &rfds, NULL, NULL, &tv);
1513     if (n > 0) {
1514         n = read(0, &ch, 1);
1515         if (n == 1)
1516             return ch;
1517
1518         return n;
1519     }
1520 #elif HAVE_KBHIT
1521 #    if HAVE_PEEKNAMEDPIPE
1522     static int is_pipe;
1523     static HANDLE input_handle;
1524     DWORD dw, nchars;
1525     if(!input_handle){
1526         input_handle = GetStdHandle(STD_INPUT_HANDLE);
1527         is_pipe = !GetConsoleMode(input_handle, &dw);
1528     }
1529
1530     if (stdin->_cnt > 0) {
1531         read(0, &ch, 1);
1532         return ch;
1533     }
1534     if (is_pipe) {
1535         /* When running under a GUI, you will end here. */
1536         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL))
1537             return -1;
1538         //Read it
1539         if(nchars != 0) {
1540             read(0, &ch, 1);
1541             return ch;
1542         }else{
1543             return -1;
1544         }
1545     }
1546 #    endif
1547     if(kbhit())
1548         return(getch());
1549 #endif
1550     return -1;
1551 }
1552
1553 static int decode_interrupt_cb(void *ctx)
1554 {
1555     return received_nb_signals > 1;
1556 }
1557
1558 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1559
1560 void av_noreturn exit_program(int ret)
1561 {
1562     int i, j;
1563
1564     for (i = 0; i < nb_filtergraphs; i++) {
1565         avfilter_graph_free(&filtergraphs[i]->graph);
1566         for (j = 0; j < filtergraphs[i]->nb_inputs; j++)
1567             av_freep(&filtergraphs[i]->inputs[j]);
1568         av_freep(&filtergraphs[i]->inputs);
1569         for (j = 0; j < filtergraphs[i]->nb_outputs; j++)
1570             av_freep(&filtergraphs[i]->outputs[j]);
1571         av_freep(&filtergraphs[i]->outputs);
1572         av_freep(&filtergraphs[i]);
1573     }
1574     av_freep(&filtergraphs);
1575
1576     /* close files */
1577     for (i = 0; i < nb_output_files; i++) {
1578         AVFormatContext *s = output_files[i]->ctx;
1579         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1580             avio_close(s->pb);
1581         avformat_free_context(s);
1582         av_dict_free(&output_files[i]->opts);
1583         av_freep(&output_files[i]);
1584     }
1585     for (i = 0; i < nb_output_streams; i++) {
1586         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1587         while (bsfc) {
1588             AVBitStreamFilterContext *next = bsfc->next;
1589             av_bitstream_filter_close(bsfc);
1590             bsfc = next;
1591         }
1592         output_streams[i]->bitstream_filters = NULL;
1593
1594         av_freep(&output_streams[i]->filtered_frame);
1595         av_freep(&output_streams[i]);
1596     }
1597     for (i = 0; i < nb_input_files; i++) {
1598         avformat_close_input(&input_files[i]->ctx);
1599         av_freep(&input_files[i]);
1600     }
1601     for (i = 0; i < nb_input_streams; i++) {
1602         av_freep(&input_streams[i]->decoded_frame);
1603         av_dict_free(&input_streams[i]->opts);
1604         free_buffer_pool(input_streams[i]);
1605         av_freep(&input_streams[i]->filters);
1606         av_freep(&input_streams[i]);
1607     }
1608
1609     if (vstats_file)
1610         fclose(vstats_file);
1611     av_free(vstats_filename);
1612
1613     av_freep(&input_streams);
1614     av_freep(&input_files);
1615     av_freep(&output_streams);
1616     av_freep(&output_files);
1617
1618     uninit_opts();
1619
1620     avfilter_uninit();
1621     avformat_network_deinit();
1622
1623     if (received_sigterm) {
1624         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1625                (int) received_sigterm);
1626         exit (255);
1627     }
1628
1629     exit(ret);
1630 }
1631
1632 static void assert_avoptions(AVDictionary *m)
1633 {
1634     AVDictionaryEntry *t;
1635     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1636         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1637         exit_program(1);
1638     }
1639 }
1640
1641 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1642 {
1643     const char *codec_string = encoder ? "encoder" : "decoder";
1644     AVCodec *codec;
1645     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1646         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1647         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1648                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1649                 codec_string, c->codec->name);
1650         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1651         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1652             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1653                    codec_string, codec->name);
1654         exit_program(1);
1655     }
1656 }
1657
1658 static void choose_sample_fmt(AVStream *st, AVCodec *codec)
1659 {
1660     if (codec && codec->sample_fmts) {
1661         const enum AVSampleFormat *p = codec->sample_fmts;
1662         for (; *p != -1; p++) {
1663             if (*p == st->codec->sample_fmt)
1664                 break;
1665         }
1666         if (*p == -1) {
1667             if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
1668                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
1669             if(av_get_sample_fmt_name(st->codec->sample_fmt))
1670             av_log(NULL, AV_LOG_WARNING,
1671                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
1672                    av_get_sample_fmt_name(st->codec->sample_fmt),
1673                    codec->name,
1674                    av_get_sample_fmt_name(codec->sample_fmts[0]));
1675             st->codec->sample_fmt = codec->sample_fmts[0];
1676         }
1677     }
1678 }
1679
1680 static double
1681 get_sync_ipts(const OutputStream *ost, int64_t pts)
1682 {
1683     OutputFile *of = output_files[ost->file_index];
1684     return (double)(pts - of->start_time) / AV_TIME_BASE;
1685 }
1686
1687 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1688 {
1689     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1690     AVCodecContext          *avctx = ost->st->codec;
1691     int ret;
1692
1693     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
1694         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
1695         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1696
1697     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1698         int64_t max = ost->st->cur_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
1699         if (ost->st->cur_dts && ost->st->cur_dts != AV_NOPTS_VALUE &&  max > pkt->dts) {
1700             av_log(s, max - pkt->dts > 2 ? AV_LOG_WARNING : AV_LOG_DEBUG, "Audio timestamp %"PRId64" < %"PRId64" invalid, cliping\n", pkt->dts, max);
1701             pkt->pts = pkt->dts = max;
1702         }
1703     }
1704
1705     /*
1706      * Audio encoders may split the packets --  #frames in != #packets out.
1707      * But there is no reordering, so we can limit the number of output packets
1708      * by simply dropping them here.
1709      * Counting encoded video frames needs to be done separately because of
1710      * reordering, see do_video_out()
1711      */
1712     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1713         if (ost->frame_number >= ost->max_frames) {
1714             av_free_packet(pkt);
1715             return;
1716         }
1717         ost->frame_number++;
1718     }
1719
1720     while (bsfc) {
1721         AVPacket new_pkt = *pkt;
1722         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1723                                            &new_pkt.data, &new_pkt.size,
1724                                            pkt->data, pkt->size,
1725                                            pkt->flags & AV_PKT_FLAG_KEY);
1726         if (a > 0) {
1727             av_free_packet(pkt);
1728             new_pkt.destruct = av_destruct_packet;
1729         } else if (a < 0) {
1730             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
1731                    bsfc->filter->name, pkt->stream_index,
1732                    avctx->codec ? avctx->codec->name : "copy");
1733             print_error("", a);
1734             if (exit_on_error)
1735                 exit_program(1);
1736         }
1737         *pkt = new_pkt;
1738
1739         bsfc = bsfc->next;
1740     }
1741
1742     pkt->stream_index = ost->index;
1743     ret = av_interleaved_write_frame(s, pkt);
1744     if (ret < 0) {
1745         print_error("av_interleaved_write_frame()", ret);
1746         exit_program(1);
1747     }
1748 }
1749
1750 static int check_recording_time(OutputStream *ost)
1751 {
1752     OutputFile *of = output_files[ost->file_index];
1753
1754     if (of->recording_time != INT64_MAX &&
1755         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
1756                       AV_TIME_BASE_Q) >= 0) {
1757         ost->is_past_recording_time = 1;
1758         return 0;
1759     }
1760     return 1;
1761 }
1762
1763 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1764                          AVFrame *frame)
1765 {
1766     AVCodecContext *enc = ost->st->codec;
1767     AVPacket pkt;
1768     int got_packet = 0;
1769
1770     av_init_packet(&pkt);
1771     pkt.data = NULL;
1772     pkt.size = 0;
1773 #if 0
1774     if (!check_recording_time(ost))
1775         return;
1776 #endif
1777     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
1778         frame->pts = ost->sync_opts;
1779     ost->sync_opts = frame->pts + frame->nb_samples;
1780
1781     av_assert0(pkt.size || !pkt.data);
1782     update_benchmark(NULL);
1783     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1784         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
1785         exit_program(1);
1786     }
1787     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
1788
1789     if (got_packet) {
1790         if (pkt.pts != AV_NOPTS_VALUE)
1791             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1792         if (pkt.dts != AV_NOPTS_VALUE)
1793             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1794         if (pkt.duration > 0)
1795             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1796
1797         if (debug_ts) {
1798             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
1799                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1800                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1801                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1802         }
1803
1804         write_frame(s, &pkt, ost);
1805
1806         audio_size += pkt.size;
1807         av_free_packet(&pkt);
1808     }
1809 }
1810
1811 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1812 {
1813     AVCodecContext *dec;
1814     AVPicture *picture2;
1815     AVPicture picture_tmp;
1816     uint8_t *buf = 0;
1817
1818     dec = ist->st->codec;
1819
1820     /* deinterlace : must be done before any resize */
1821     if (do_deinterlace) {
1822         int size;
1823
1824         /* create temporary picture */
1825         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1826         buf  = av_malloc(size);
1827         if (!buf)
1828             return;
1829
1830         picture2 = &picture_tmp;
1831         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1832
1833         if (avpicture_deinterlace(picture2, picture,
1834                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1835             /* if error, do not deinterlace */
1836             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1837             av_free(buf);
1838             buf = NULL;
1839             picture2 = picture;
1840         }
1841     } else {
1842         picture2 = picture;
1843     }
1844
1845     if (picture != picture2)
1846         *picture = *picture2;
1847     *bufp = buf;
1848 }
1849
1850 static void do_subtitle_out(AVFormatContext *s,
1851                             OutputStream *ost,
1852                             InputStream *ist,
1853                             AVSubtitle *sub,
1854                             int64_t pts)
1855 {
1856     static uint8_t *subtitle_out = NULL;
1857     int subtitle_out_max_size = 1024 * 1024;
1858     int subtitle_out_size, nb, i;
1859     AVCodecContext *enc;
1860     AVPacket pkt;
1861
1862     if (pts == AV_NOPTS_VALUE) {
1863         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1864         if (exit_on_error)
1865             exit_program(1);
1866         return;
1867     }
1868
1869     enc = ost->st->codec;
1870
1871     if (!subtitle_out) {
1872         subtitle_out = av_malloc(subtitle_out_max_size);
1873     }
1874
1875     /* Note: DVB subtitle need one packet to draw them and one other
1876        packet to clear them */
1877     /* XXX: signal it in the codec context ? */
1878     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1879         nb = 2;
1880     else
1881         nb = 1;
1882
1883     for (i = 0; i < nb; i++) {
1884         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1885
1886         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1887         // start_display_time is required to be 0
1888         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1889         sub->end_display_time  -= sub->start_display_time;
1890         sub->start_display_time = 0;
1891         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1892                                                     subtitle_out_max_size, sub);
1893         if (subtitle_out_size < 0) {
1894             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1895             exit_program(1);
1896         }
1897
1898         av_init_packet(&pkt);
1899         pkt.data = subtitle_out;
1900         pkt.size = subtitle_out_size;
1901         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1902         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1903             /* XXX: the pts correction is handled here. Maybe handling
1904                it in the codec would be better */
1905             if (i == 0)
1906                 pkt.pts += 90 * sub->start_display_time;
1907             else
1908                 pkt.pts += 90 * sub->end_display_time;
1909         }
1910         write_frame(s, &pkt, ost);
1911     }
1912 }
1913
1914 static double psnr(double d)
1915 {
1916     return -10.0 * log(d) / log(10.0);
1917 }
1918
1919 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1920                            int frame_size)
1921 {
1922     AVCodecContext *enc;
1923     int frame_number;
1924     double ti1, bitrate, avg_bitrate;
1925
1926     /* this is executed just the first time do_video_stats is called */
1927     if (!vstats_file) {
1928         vstats_file = fopen(vstats_filename, "w");
1929         if (!vstats_file) {
1930             perror("fopen");
1931             exit_program(1);
1932         }
1933     }
1934
1935     enc = ost->st->codec;
1936     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1937         frame_number = ost->frame_number;
1938         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1939         if (enc->flags&CODEC_FLAG_PSNR)
1940             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1941
1942         fprintf(vstats_file,"f_size= %6d ", frame_size);
1943         /* compute pts value */
1944         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1945         if (ti1 < 0.01)
1946             ti1 = 0.01;
1947
1948         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1949         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1950         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1951                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1952         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1953     }
1954 }
1955
1956
1957 static void do_video_out(AVFormatContext *s, OutputStream *ost,
1958                          AVFrame *in_picture, float quality)
1959 {
1960     int nb_frames, i, ret, format_video_sync;
1961     AVCodecContext *enc;
1962     double sync_ipts, delta;
1963     double duration = 0;
1964     int frame_size = 0;
1965     InputStream *ist = NULL;
1966
1967     if (ost->source_index >= 0)
1968         ist = input_streams[ost->source_index];
1969
1970     enc = ost->st->codec;
1971
1972     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
1973         duration = 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base));
1974
1975     sync_ipts = get_sync_ipts(ost, in_picture->pts) / av_q2d(enc->time_base);
1976     delta = sync_ipts - ost->sync_opts + duration;
1977
1978     /* by default, we output a single frame */
1979     nb_frames = 1;
1980
1981     format_video_sync = video_sync_method;
1982     if (format_video_sync == VSYNC_AUTO)
1983         format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : 1;
1984
1985     switch (format_video_sync) {
1986     case VSYNC_CFR:
1987         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
1988         if (delta < -1.1)
1989             nb_frames = 0;
1990         else if (delta > 1.1)
1991             nb_frames = lrintf(delta);
1992         break;
1993     case VSYNC_VFR:
1994         if (delta <= -0.6)
1995             nb_frames = 0;
1996         else if (delta > 0.6)
1997             ost->sync_opts = lrint(sync_ipts);
1998         break;
1999     case VSYNC_DROP:
2000     case VSYNC_PASSTHROUGH:
2001         ost->sync_opts = lrint(sync_ipts);
2002         break;
2003     default:
2004         av_assert0(0);
2005     }
2006
2007     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
2008     if (nb_frames == 0) {
2009         nb_frames_drop++;
2010         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
2011         return;
2012     } else if (nb_frames > 1) {
2013         nb_frames_dup += nb_frames - 1;
2014         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
2015     }
2016
2017     /* duplicates frame if needed */
2018     for (i = 0; i < nb_frames; i++) {
2019         AVPacket pkt;
2020         av_init_packet(&pkt);
2021         pkt.data = NULL;
2022         pkt.size = 0;
2023
2024         if (s->oformat->flags & AVFMT_RAWPICTURE &&
2025             enc->codec->id == CODEC_ID_RAWVIDEO) {
2026             /* raw pictures are written as AVPicture structure to
2027                avoid any copies. We support temporarily the older
2028                method. */
2029             enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
2030             enc->coded_frame->top_field_first  = in_picture->top_field_first;
2031             pkt.data   = (uint8_t *)in_picture;
2032             pkt.size   =  sizeof(AVPicture);
2033             pkt.pts    = av_rescale_q(ost->sync_opts, enc->time_base, ost->st->time_base);
2034             pkt.flags |= AV_PKT_FLAG_KEY;
2035
2036             write_frame(s, &pkt, ost);
2037         } else {
2038             int got_packet;
2039             AVFrame big_picture;
2040
2041             big_picture = *in_picture;
2042             /* better than nothing: use input picture interlaced
2043                settings */
2044             big_picture.interlaced_frame = in_picture->interlaced_frame;
2045             if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
2046                 if (ost->top_field_first == -1)
2047                     big_picture.top_field_first = in_picture->top_field_first;
2048                 else
2049                     big_picture.top_field_first = !!ost->top_field_first;
2050             }
2051
2052             /* handles same_quant here. This is not correct because it may
2053                not be a global option */
2054             big_picture.quality = quality;
2055             if (!enc->me_threshold)
2056                 big_picture.pict_type = 0;
2057             big_picture.pts = ost->sync_opts;
2058             if (ost->forced_kf_index < ost->forced_kf_count &&
2059                 big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
2060                 big_picture.pict_type = AV_PICTURE_TYPE_I;
2061                 ost->forced_kf_index++;
2062             }
2063             update_benchmark(NULL);
2064             ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
2065             update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
2066             if (ret < 0) {
2067                 av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
2068                 exit_program(1);
2069             }
2070
2071             if (got_packet) {
2072                 if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
2073                     pkt.pts = ost->sync_opts;
2074
2075                 if (pkt.pts != AV_NOPTS_VALUE)
2076                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
2077                 if (pkt.dts != AV_NOPTS_VALUE)
2078                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
2079
2080                 if (debug_ts) {
2081                     av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
2082                            "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
2083                            av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
2084                            av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
2085                 }
2086
2087                 write_frame(s, &pkt, ost);
2088                 frame_size = pkt.size;
2089                 video_size += pkt.size;
2090                 av_free_packet(&pkt);
2091
2092                 /* if two pass, output log */
2093                 if (ost->logfile && enc->stats_out) {
2094                     fprintf(ost->logfile, "%s", enc->stats_out);
2095                 }
2096             }
2097         }
2098         ost->sync_opts++;
2099         /*
2100          * For video, number of frames in == number of packets out.
2101          * But there may be reordering, so we can't throw away frames on encoder
2102          * flush, we need to limit them here, before they go into encoder.
2103          */
2104         ost->frame_number++;
2105     }
2106     if (vstats_filename && frame_size)
2107         do_video_stats(output_files[ost->file_index]->ctx, ost, frame_size);
2108 }
2109
2110 /* check for new output on any of the filtergraphs */
2111 static int poll_filters(void)
2112 {
2113     AVFilterBufferRef *picref;
2114     AVFrame *filtered_frame = NULL;
2115     int i, ret, ret_all;
2116     unsigned nb_success, nb_eof;
2117     int64_t frame_pts;
2118
2119     while (1) {
2120         /* Reap all buffers present in the buffer sinks */
2121         for (i = 0; i < nb_output_streams; i++) {
2122             OutputStream *ost = output_streams[i];
2123             OutputFile    *of = output_files[ost->file_index];
2124             int ret = 0;
2125
2126             if (!ost->filter || ost->is_past_recording_time)
2127                 continue;
2128
2129             if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
2130                 return AVERROR(ENOMEM);
2131             } else
2132                 avcodec_get_frame_defaults(ost->filtered_frame);
2133             filtered_frame = ost->filtered_frame;
2134
2135             while (1) {
2136                 AVRational ist_pts_tb = ost->filter->filter->inputs[0]->time_base;
2137                 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2138                     !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
2139                     ret = av_buffersink_read_samples(ost->filter->filter, &picref,
2140                                                     ost->st->codec->frame_size);
2141                 else
2142 #ifdef SINKA
2143                     ret = av_buffersink_read(ost->filter->filter, &picref);
2144 #else
2145                     ret = av_buffersink_get_buffer_ref(ost->filter->filter, &picref,
2146                                                        AV_BUFFERSINK_FLAG_NO_REQUEST);
2147 #endif
2148                 if (ret < 0) {
2149                     if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
2150                         char buf[256];
2151                         av_strerror(ret, buf, sizeof(buf));
2152                         av_log(NULL, AV_LOG_WARNING,
2153                                "Error in av_buffersink_get_buffer_ref(): %s\n", buf);
2154                     }
2155                     break;
2156                 }
2157                 frame_pts = AV_NOPTS_VALUE;
2158                 if (ost->enc->type == AVMEDIA_TYPE_VIDEO)
2159                     filtered_frame->pts = frame_pts = av_rescale_q(picref->pts, ist_pts_tb, AV_TIME_BASE_Q);
2160                 else if (picref->pts != AV_NOPTS_VALUE)
2161                     filtered_frame->pts = frame_pts = av_rescale_q(picref->pts,
2162                                                     ost->filter->filter->inputs[0]->time_base,
2163                                                     ost->st->codec->time_base) -
2164                                         av_rescale_q(of->start_time,
2165                                                     AV_TIME_BASE_Q,
2166                                                     ost->st->codec->time_base);
2167                 //if (ost->source_index >= 0)
2168                 //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
2169
2170                 if (of->start_time && filtered_frame->pts < of->start_time) {
2171                     avfilter_unref_buffer(picref);
2172                     continue;
2173                 }
2174
2175                 switch (ost->filter->filter->inputs[0]->type) {
2176                 case AVMEDIA_TYPE_VIDEO:
2177                     avfilter_fill_frame_from_video_buffer_ref(filtered_frame, picref);
2178                     filtered_frame->pts = frame_pts;
2179                     if (!ost->frame_aspect_ratio)
2180                         ost->st->codec->sample_aspect_ratio = picref->video->sample_aspect_ratio;
2181
2182                     do_video_out(of->ctx, ost, filtered_frame,
2183                                  same_quant ? ost->last_quality :
2184                                               ost->st->codec->global_quality);
2185                     break;
2186                 case AVMEDIA_TYPE_AUDIO:
2187                     avfilter_copy_buf_props(filtered_frame, picref);
2188                     filtered_frame->pts = frame_pts;
2189                     do_audio_out(of->ctx, ost, filtered_frame);
2190                     break;
2191                 default:
2192                     // TODO support subtitle filters
2193                     av_assert0(0);
2194                 }
2195
2196                 avfilter_unref_buffer(picref);
2197             }
2198         }
2199         /* Request frames through all the graphs */
2200         ret_all = nb_success = nb_eof = 0;
2201         for (i = 0; i < nb_filtergraphs; i++) {
2202             ret = avfilter_graph_request_oldest(filtergraphs[i]->graph);
2203             if (!ret) {
2204                 nb_success++;
2205             } else if (ret == AVERROR_EOF) {
2206                 nb_eof++;
2207             } else if (ret != AVERROR(EAGAIN)) {
2208                 char buf[256];
2209                 av_strerror(ret, buf, sizeof(buf));
2210                 av_log(NULL, AV_LOG_WARNING,
2211                        "Error in request_frame(): %s\n", buf);
2212                 ret_all = ret;
2213             }
2214         }
2215         if (!nb_success)
2216             break;
2217         /* Try again if anything succeeded */
2218     }
2219     return nb_eof == nb_filtergraphs ? AVERROR_EOF : ret_all;
2220 }
2221
2222 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
2223 {
2224     char buf[1024];
2225     OutputStream *ost;
2226     AVFormatContext *oc;
2227     int64_t total_size;
2228     AVCodecContext *enc;
2229     int frame_number, vid, i;
2230     double bitrate;
2231     int64_t pts = INT64_MAX;
2232     static int64_t last_time = -1;
2233     static int qp_histogram[52];
2234     int hours, mins, secs, us;
2235
2236     if (!print_stats && !is_last_report)
2237         return;
2238
2239     if (!is_last_report) {
2240         if (last_time == -1) {
2241             last_time = cur_time;
2242             return;
2243         }
2244         if ((cur_time - last_time) < 500000)
2245             return;
2246         last_time = cur_time;
2247     }
2248
2249
2250     oc = output_files[0]->ctx;
2251
2252     total_size = avio_size(oc->pb);
2253     if (total_size < 0) { // FIXME improve avio_size() so it works with non seekable output too
2254         total_size = avio_tell(oc->pb);
2255         if (total_size < 0)
2256             total_size = 0;
2257     }
2258
2259     buf[0] = '\0';
2260     vid = 0;
2261     for (i = 0; i < nb_output_streams; i++) {
2262         float q = -1;
2263         ost = output_streams[i];
2264         enc = ost->st->codec;
2265         if (!ost->stream_copy && enc->coded_frame)
2266             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
2267         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2268             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
2269         }
2270         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2271             float fps, t = (cur_time-timer_start) / 1000000.0;
2272
2273             frame_number = ost->frame_number;
2274             fps = t > 1 ? frame_number / t : 0;
2275             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
2276                      frame_number, fps < 9.95, fps, q);
2277             if (is_last_report)
2278                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
2279             if (qp_hist) {
2280                 int j;
2281                 int qp = lrintf(q);
2282                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
2283                     qp_histogram[qp]++;
2284                 for (j = 0; j < 32; j++)
2285                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
2286             }
2287             if (enc->flags&CODEC_FLAG_PSNR) {
2288                 int j;
2289                 double error, error_sum = 0;
2290                 double scale, scale_sum = 0;
2291                 char type[3] = { 'Y','U','V' };
2292                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
2293                 for (j = 0; j < 3; j++) {
2294                     if (is_last_report) {
2295                         error = enc->error[j];
2296                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
2297                     } else {
2298                         error = enc->coded_frame->error[j];
2299                         scale = enc->width * enc->height * 255.0 * 255.0;
2300                     }
2301                     if (j)
2302                         scale /= 4;
2303                     error_sum += error;
2304                     scale_sum += scale;
2305                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
2306                 }
2307                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
2308             }
2309             vid = 1;
2310         }
2311         /* compute min output value */
2312         pts = FFMIN(pts, av_rescale_q(ost->st->pts.val,
2313                                       ost->st->time_base, AV_TIME_BASE_Q));
2314     }
2315
2316     secs = pts / AV_TIME_BASE;
2317     us = pts % AV_TIME_BASE;
2318     mins = secs / 60;
2319     secs %= 60;
2320     hours = mins / 60;
2321     mins %= 60;
2322
2323     bitrate = pts ? total_size * 8 / (pts / 1000.0) : 0;
2324
2325     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2326              "size=%8.0fkB time=", total_size / 1024.0);
2327     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2328              "%02d:%02d:%02d.%02d ", hours, mins, secs,
2329              (100 * us) / AV_TIME_BASE);
2330     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2331              "bitrate=%6.1fkbits/s", bitrate);
2332
2333     if (nb_frames_dup || nb_frames_drop)
2334         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
2335                 nb_frames_dup, nb_frames_drop);
2336
2337     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
2338
2339     fflush(stderr);
2340
2341     if (is_last_report) {
2342         int64_t raw= audio_size + video_size + extra_size;
2343         av_log(NULL, AV_LOG_INFO, "\n");
2344         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
2345                video_size / 1024.0,
2346                audio_size / 1024.0,
2347                extra_size / 1024.0,
2348                100.0 * (total_size - raw) / raw
2349         );
2350         if(video_size + audio_size + extra_size == 0){
2351             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
2352         }
2353     }
2354 }
2355
2356 static void flush_encoders(void)
2357 {
2358     int i, ret;
2359
2360     for (i = 0; i < nb_output_streams; i++) {
2361         OutputStream   *ost = output_streams[i];
2362         AVCodecContext *enc = ost->st->codec;
2363         AVFormatContext *os = output_files[ost->file_index]->ctx;
2364         int stop_encoding = 0;
2365
2366         if (!ost->encoding_needed)
2367             continue;
2368
2369         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
2370             continue;
2371         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
2372             continue;
2373
2374         for (;;) {
2375             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
2376             const char *desc;
2377             int64_t *size;
2378
2379             switch (ost->st->codec->codec_type) {
2380             case AVMEDIA_TYPE_AUDIO:
2381                 encode = avcodec_encode_audio2;
2382                 desc   = "Audio";
2383                 size   = &audio_size;
2384                 break;
2385             case AVMEDIA_TYPE_VIDEO:
2386                 encode = avcodec_encode_video2;
2387                 desc   = "Video";
2388                 size   = &video_size;
2389                 break;
2390             default:
2391                 stop_encoding = 1;
2392             }
2393
2394             if (encode) {
2395                 AVPacket pkt;
2396                 int got_packet;
2397                 av_init_packet(&pkt);
2398                 pkt.data = NULL;
2399                 pkt.size = 0;
2400
2401                 update_benchmark(NULL);
2402                 ret = encode(enc, &pkt, NULL, &got_packet);
2403                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
2404                 if (ret < 0) {
2405                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
2406                     exit_program(1);
2407                 }
2408                 *size += pkt.size;
2409                 if (ost->logfile && enc->stats_out) {
2410                     fprintf(ost->logfile, "%s", enc->stats_out);
2411                 }
2412                 if (!got_packet) {
2413                     stop_encoding = 1;
2414                     break;
2415                 }
2416                 if (pkt.pts != AV_NOPTS_VALUE)
2417                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
2418                 if (pkt.dts != AV_NOPTS_VALUE)
2419                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
2420                 write_frame(os, &pkt, ost);
2421             }
2422
2423             if (stop_encoding)
2424                 break;
2425         }
2426     }
2427 }
2428
2429 /*
2430  * Check whether a packet from ist should be written into ost at this time
2431  */
2432 static int check_output_constraints(InputStream *ist, OutputStream *ost)
2433 {
2434     OutputFile *of = output_files[ost->file_index];
2435     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
2436
2437     if (ost->source_index != ist_index)
2438         return 0;
2439
2440     if (of->start_time && ist->pts < of->start_time)
2441         return 0;
2442
2443     if (of->recording_time != INT64_MAX &&
2444         av_compare_ts(ist->pts, AV_TIME_BASE_Q, of->recording_time + of->start_time,
2445                       (AVRational){ 1, 1000000 }) >= 0) {
2446         ost->is_past_recording_time = 1;
2447         return 0;
2448     }
2449
2450     return 1;
2451 }
2452
2453 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
2454 {
2455     OutputFile *of = output_files[ost->file_index];
2456     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
2457     AVPicture pict;
2458     AVPacket opkt;
2459
2460     av_init_packet(&opkt);
2461
2462     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
2463         !ost->copy_initial_nonkeyframes)
2464         return;
2465
2466     /* force the input stream PTS */
2467     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2468         audio_size += pkt->size;
2469     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2470         video_size += pkt->size;
2471         ost->sync_opts++;
2472     }
2473
2474     if (pkt->pts != AV_NOPTS_VALUE)
2475         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
2476     else
2477         opkt.pts = AV_NOPTS_VALUE;
2478
2479     if (pkt->dts == AV_NOPTS_VALUE)
2480         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
2481     else
2482         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
2483     opkt.dts -= ost_tb_start_time;
2484
2485     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
2486     opkt.flags    = pkt->flags;
2487
2488     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
2489     if (  ost->st->codec->codec_id != CODEC_ID_H264
2490        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
2491        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
2492        && ost->st->codec->codec_id != CODEC_ID_VC1
2493        ) {
2494         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
2495             opkt.destruct = av_destruct_packet;
2496     } else {
2497         opkt.data = pkt->data;
2498         opkt.size = pkt->size;
2499     }
2500     if (of->ctx->oformat->flags & AVFMT_RAWPICTURE) {
2501         /* store AVPicture in AVPacket, as expected by the output format */
2502         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
2503         opkt.data = (uint8_t *)&pict;
2504         opkt.size = sizeof(AVPicture);
2505         opkt.flags |= AV_PKT_FLAG_KEY;
2506     }
2507
2508     write_frame(of->ctx, &opkt, ost);
2509     ost->st->codec->frame_number++;
2510     av_free_packet(&opkt);
2511 }
2512
2513 static void rate_emu_sleep(InputStream *ist)
2514 {
2515     if (input_files[ist->file_index]->rate_emu) {
2516         int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
2517         int64_t now = av_gettime() - ist->start;
2518         if (pts > now)
2519             usleep(pts - now);
2520     }
2521 }
2522
2523 static int guess_input_channel_layout(InputStream *ist)
2524 {
2525     AVCodecContext *dec = ist->st->codec;
2526
2527     if (!dec->channel_layout) {
2528         char layout_name[256];
2529
2530         dec->channel_layout = av_get_default_channel_layout(dec->channels);
2531         if (!dec->channel_layout)
2532             return 0;
2533         av_get_channel_layout_string(layout_name, sizeof(layout_name),
2534                                      dec->channels, dec->channel_layout);
2535         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
2536                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
2537     }
2538     return 1;
2539 }
2540
2541 static int transcode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
2542 {
2543     AVFrame *decoded_frame;
2544     AVCodecContext *avctx = ist->st->codec;
2545     int i, ret, resample_changed;
2546
2547     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2548         return AVERROR(ENOMEM);
2549     else
2550         avcodec_get_frame_defaults(ist->decoded_frame);
2551     decoded_frame = ist->decoded_frame;
2552
2553     update_benchmark(NULL);
2554     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
2555     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
2556     if (ret < 0) {
2557         return ret;
2558     }
2559     if (avctx->sample_rate <= 0) {
2560         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
2561         return AVERROR_INVALIDDATA;
2562     }
2563
2564     if (!*got_output) {
2565         /* no audio frame */
2566         if (!pkt->size)
2567             for (i = 0; i < ist->nb_filters; i++)
2568                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL,
2569                                      AV_BUFFERSRC_FLAG_NO_COPY);
2570         return ret;
2571     }
2572
2573     /* if the decoder provides a pts, use it instead of the last packet pts.
2574        the decoder could be delaying output by a packet or more. */
2575     if (decoded_frame->pts != AV_NOPTS_VALUE)
2576         ist->dts = ist->next_dts = ist->pts = ist->next_pts = decoded_frame->pts;
2577     else if (pkt->pts != AV_NOPTS_VALUE) {
2578         decoded_frame->pts = pkt->pts;
2579         pkt->pts           = AV_NOPTS_VALUE;
2580     }else
2581         decoded_frame->pts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
2582
2583
2584 #if 1
2585     /* increment next_dts to use for the case where the input stream does not
2586        have timestamps or there are multiple frames in the packet */
2587     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2588                      avctx->sample_rate;
2589     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2590                      avctx->sample_rate;
2591 #endif
2592
2593     rate_emu_sleep(ist);
2594
2595     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
2596                        ist->resample_channels       != avctx->channels               ||
2597                        ist->resample_channel_layout != decoded_frame->channel_layout ||
2598                        ist->resample_sample_rate    != decoded_frame->sample_rate;
2599     if (resample_changed) {
2600         char layout1[64], layout2[64];
2601
2602         if (!guess_input_channel_layout(ist)) {
2603             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
2604                    "layout for Input Stream #%d.%d\n", ist->file_index,
2605                    ist->st->index);
2606             exit_program(1);
2607         }
2608         decoded_frame->channel_layout = avctx->channel_layout;
2609
2610         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
2611                                      ist->resample_channel_layout);
2612         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
2613                                      decoded_frame->channel_layout);
2614
2615         av_log(NULL, AV_LOG_INFO,
2616                "Input stream #%d:%d frame changed from rate:%d fmt:%s ch:%d chl:%s to rate:%d fmt:%s ch:%d chl:%s\n",
2617                ist->file_index, ist->st->index,
2618                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2619                ist->resample_channels, layout1,
2620                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2621                avctx->channels, layout2);
2622
2623         ist->resample_sample_fmt     = decoded_frame->format;
2624         ist->resample_sample_rate    = decoded_frame->sample_rate;
2625         ist->resample_channel_layout = decoded_frame->channel_layout;
2626         ist->resample_channels       = avctx->channels;
2627
2628         for (i = 0; i < nb_filtergraphs; i++)
2629             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2630                 configure_filtergraph(filtergraphs[i]) < 0) {
2631                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2632                 exit_program(1);
2633             }
2634     }
2635
2636     for (i = 0; i < ist->nb_filters; i++)
2637         av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, 0);
2638
2639     return ret;
2640 }
2641
2642 static int transcode_video(InputStream *ist, AVPacket *pkt, int *got_output, int64_t *pkt_pts)
2643 {
2644     AVFrame *decoded_frame;
2645     void *buffer_to_free = NULL;
2646     int i, ret = 0, resample_changed;
2647     int64_t best_effort_timestamp;
2648     AVRational *frame_sample_aspect;
2649     float quality;
2650
2651     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2652         return AVERROR(ENOMEM);
2653     else
2654         avcodec_get_frame_defaults(ist->decoded_frame);
2655     decoded_frame = ist->decoded_frame;
2656     pkt->pts  = *pkt_pts;
2657     pkt->dts  = ist->dts;
2658     *pkt_pts  = AV_NOPTS_VALUE;
2659
2660     update_benchmark(NULL);
2661     ret = avcodec_decode_video2(ist->st->codec,
2662                                 decoded_frame, got_output, pkt);
2663     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
2664     if (ret < 0)
2665         return ret;
2666
2667     quality = same_quant ? decoded_frame->quality : 0;
2668     if (!*got_output) {
2669         /* no picture yet */
2670         if (!pkt->size)
2671             for (i = 0; i < ist->nb_filters; i++)
2672                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, AV_BUFFERSRC_FLAG_NO_COPY);
2673         return ret;
2674     }
2675
2676     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
2677     if(best_effort_timestamp != AV_NOPTS_VALUE)
2678         ist->next_pts = ist->pts = decoded_frame->pts = best_effort_timestamp;
2679
2680     pkt->size = 0;
2681     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2682
2683     rate_emu_sleep(ist);
2684
2685     if (ist->st->sample_aspect_ratio.num)
2686         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2687
2688     resample_changed = ist->resample_width   != decoded_frame->width  ||
2689                        ist->resample_height  != decoded_frame->height ||
2690                        ist->resample_pix_fmt != decoded_frame->format;
2691     if (resample_changed) {
2692         av_log(NULL, AV_LOG_INFO,
2693                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2694                ist->file_index, ist->st->index,
2695                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2696                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2697
2698         ist->resample_width   = decoded_frame->width;
2699         ist->resample_height  = decoded_frame->height;
2700         ist->resample_pix_fmt = decoded_frame->format;
2701
2702         for (i = 0; i < nb_filtergraphs; i++)
2703             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2704                 configure_filtergraph(filtergraphs[i]) < 0) {
2705                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2706                 exit_program(1);
2707             }
2708     }
2709
2710     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2711     for (i = 0; i < ist->nb_filters; i++) {
2712         int changed =      ist->st->codec->width   != ist->filters[i]->filter->outputs[0]->w
2713                         || ist->st->codec->height  != ist->filters[i]->filter->outputs[0]->h
2714                         || ist->st->codec->pix_fmt != ist->filters[i]->filter->outputs[0]->format;
2715         // XXX what an ugly hack
2716         if (ist->filters[i]->graph->nb_outputs == 1)
2717             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2718
2719         if (!frame_sample_aspect->num)
2720             *frame_sample_aspect = ist->st->sample_aspect_ratio;
2721         if (ist->dr1 && decoded_frame->type==FF_BUFFER_TYPE_USER && !changed) {
2722             FrameBuffer      *buf = decoded_frame->opaque;
2723             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2724                                         decoded_frame->data, decoded_frame->linesize,
2725                                         AV_PERM_READ | AV_PERM_PRESERVE,
2726                                         ist->st->codec->width, ist->st->codec->height,
2727                                         ist->st->codec->pix_fmt);
2728
2729             avfilter_copy_frame_props(fb, decoded_frame);
2730             fb->buf->priv           = buf;
2731             fb->buf->free           = filter_release_buffer;
2732
2733             av_assert0(buf->refcount>0);
2734             buf->refcount++;
2735             av_buffersrc_add_ref(ist->filters[i]->filter, fb,
2736                                  AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT |
2737                                  AV_BUFFERSRC_FLAG_NO_COPY);
2738         } else
2739         if(av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, 0)<0) {
2740             av_log(NULL, AV_LOG_FATAL, "Failed to inject frame into filter network\n");
2741             exit_program(1);
2742         }
2743
2744     }
2745
2746     av_free(buffer_to_free);
2747     return ret;
2748 }
2749
2750 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2751 {
2752     AVSubtitle subtitle;
2753     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2754                                           &subtitle, got_output, pkt);
2755     if (ret < 0)
2756         return ret;
2757     if (!*got_output)
2758         return ret;
2759
2760     rate_emu_sleep(ist);
2761
2762     for (i = 0; i < nb_output_streams; i++) {
2763         OutputStream *ost = output_streams[i];
2764
2765         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2766             continue;
2767
2768         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2769     }
2770
2771     avsubtitle_free(&subtitle);
2772     return ret;
2773 }
2774
2775 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2776 static int output_packet(InputStream *ist, const AVPacket *pkt)
2777 {
2778     int ret = 0, i;
2779     int got_output;
2780     int64_t pkt_pts = AV_NOPTS_VALUE;
2781
2782     AVPacket avpkt;
2783     if (!ist->saw_first_ts) {
2784         ist->dts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
2785         ist->pts = 0;
2786         if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
2787             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2788             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
2789         }
2790         ist->saw_first_ts = 1;
2791     }
2792
2793     if (ist->next_dts == AV_NOPTS_VALUE)
2794         ist->next_dts = ist->dts;
2795     if (ist->next_pts == AV_NOPTS_VALUE)
2796         ist->next_pts = ist->pts;
2797
2798     if (pkt == NULL) {
2799         /* EOF handling */
2800         av_init_packet(&avpkt);
2801         avpkt.data = NULL;
2802         avpkt.size = 0;
2803         goto handle_eof;
2804     } else {
2805         avpkt = *pkt;
2806     }
2807
2808     if (pkt->dts != AV_NOPTS_VALUE) {
2809         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2810         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2811             ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2812     }
2813     if(pkt->pts != AV_NOPTS_VALUE)
2814         pkt_pts = av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2815
2816     // while we have more to decode or while the decoder did output something on EOF
2817     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2818         int duration;
2819     handle_eof:
2820
2821         ist->pts = ist->next_pts;
2822         ist->dts = ist->next_dts;
2823
2824         if (avpkt.size && avpkt.size != pkt->size) {
2825             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2826                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2827             ist->showed_multi_packet_warning = 1;
2828         }
2829
2830         switch (ist->st->codec->codec_type) {
2831         case AVMEDIA_TYPE_AUDIO:
2832             ret = transcode_audio    (ist, &avpkt, &got_output);
2833             break;
2834         case AVMEDIA_TYPE_VIDEO:
2835             ret = transcode_video    (ist, &avpkt, &got_output, &pkt_pts);
2836             if (avpkt.duration) {
2837                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2838             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
2839                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
2840                 duration = ((int64_t)AV_TIME_BASE *
2841                                 ist->st->codec->time_base.num * ticks) /
2842                                 ist->st->codec->time_base.den;
2843             } else
2844                 duration = 0;
2845
2846             if(ist->dts != AV_NOPTS_VALUE && duration) {
2847                 ist->next_dts += duration;
2848             }else
2849                 ist->next_dts = AV_NOPTS_VALUE;
2850
2851             if (got_output)
2852                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
2853             break;
2854         case AVMEDIA_TYPE_SUBTITLE:
2855             ret = transcode_subtitles(ist, &avpkt, &got_output);
2856             break;
2857         default:
2858             return -1;
2859         }
2860
2861         if (ret < 0)
2862             return ret;
2863
2864         avpkt.dts=
2865         avpkt.pts= AV_NOPTS_VALUE;
2866
2867         // touch data and size only if not EOF
2868         if (pkt) {
2869             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
2870                 ret = avpkt.size;
2871             avpkt.data += ret;
2872             avpkt.size -= ret;
2873         }
2874         if (!got_output) {
2875             continue;
2876         }
2877     }
2878
2879     /* handle stream copy */
2880     if (!ist->decoding_needed) {
2881         rate_emu_sleep(ist);
2882         ist->dts = ist->next_dts;
2883         switch (ist->st->codec->codec_type) {
2884         case AVMEDIA_TYPE_AUDIO:
2885             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2886                              ist->st->codec->sample_rate;
2887             break;
2888         case AVMEDIA_TYPE_VIDEO:
2889             if (pkt->duration) {
2890                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2891             } else if(ist->st->codec->time_base.num != 0) {
2892                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2893                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2894                                   ist->st->codec->time_base.num * ticks) /
2895                                   ist->st->codec->time_base.den;
2896             }
2897             break;
2898         }
2899         ist->pts = ist->dts;
2900         ist->next_pts = ist->next_dts;
2901     }
2902     for (i = 0; pkt && i < nb_output_streams; i++) {
2903         OutputStream *ost = output_streams[i];
2904
2905         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2906             continue;
2907
2908         do_streamcopy(ist, ost, pkt);
2909     }
2910
2911     return 0;
2912 }
2913
2914 static void print_sdp(void)
2915 {
2916     char sdp[2048];
2917     int i;
2918     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2919
2920     if (!avc)
2921         exit_program(1);
2922     for (i = 0; i < nb_output_files; i++)
2923         avc[i] = output_files[i]->ctx;
2924
2925     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2926     printf("SDP:\n%s\n", sdp);
2927     fflush(stdout);
2928     av_freep(&avc);
2929 }
2930
2931 static int init_input_stream(int ist_index, char *error, int error_len)
2932 {
2933     InputStream *ist = input_streams[ist_index];
2934
2935     if (ist->decoding_needed) {
2936         AVCodec *codec = ist->dec;
2937         if (!codec) {
2938             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2939                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
2940             return AVERROR(EINVAL);
2941         }
2942
2943         ist->dr1 = (codec->capabilities & CODEC_CAP_DR1) && !do_deinterlace;
2944         if (codec->type == AVMEDIA_TYPE_VIDEO && ist->dr1) {
2945             ist->st->codec->get_buffer     = codec_get_buffer;
2946             ist->st->codec->release_buffer = codec_release_buffer;
2947             ist->st->codec->opaque         = ist;
2948         }
2949
2950         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2951             av_dict_set(&ist->opts, "threads", "auto", 0);
2952         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2953             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2954                     ist->file_index, ist->st->index);
2955             return AVERROR(EINVAL);
2956         }
2957         assert_codec_experimental(ist->st->codec, 0);
2958         assert_avoptions(ist->opts);
2959     }
2960
2961     ist->next_pts = AV_NOPTS_VALUE;
2962     ist->next_dts = AV_NOPTS_VALUE;
2963     ist->is_start = 1;
2964
2965     return 0;
2966 }
2967
2968 static InputStream *get_input_stream(OutputStream *ost)
2969 {
2970     if (ost->source_index >= 0)
2971         return input_streams[ost->source_index];
2972
2973     if (ost->filter) {
2974         FilterGraph *fg = ost->filter->graph;
2975         int i;
2976
2977         for (i = 0; i < fg->nb_inputs; i++)
2978             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
2979                 return fg->inputs[i]->ist;
2980     }
2981
2982     return NULL;
2983 }
2984
2985 static int transcode_init(void)
2986 {
2987     int ret = 0, i, j, k;
2988     AVFormatContext *oc;
2989     AVCodecContext *codec, *icodec;
2990     OutputStream *ost;
2991     InputStream *ist;
2992     char error[1024];
2993     int want_sdp = 1;
2994
2995     /* init framerate emulation */
2996     for (i = 0; i < nb_input_files; i++) {
2997         InputFile *ifile = input_files[i];
2998         if (ifile->rate_emu)
2999             for (j = 0; j < ifile->nb_streams; j++)
3000                 input_streams[j + ifile->ist_index]->start = av_gettime();
3001     }
3002
3003     /* output stream init */
3004     for (i = 0; i < nb_output_files; i++) {
3005         oc = output_files[i]->ctx;
3006         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
3007             av_dump_format(oc, i, oc->filename, 1);
3008             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
3009             return AVERROR(EINVAL);
3010         }
3011     }
3012
3013     /* init complex filtergraphs */
3014     for (i = 0; i < nb_filtergraphs; i++)
3015         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
3016             return ret;
3017
3018     /* for each output stream, we compute the right encoding parameters */
3019     for (i = 0; i < nb_output_streams; i++) {
3020         ost = output_streams[i];
3021         oc  = output_files[ost->file_index]->ctx;
3022         ist = get_input_stream(ost);
3023
3024         if (ost->attachment_filename)
3025             continue;
3026
3027         codec  = ost->st->codec;
3028
3029         if (ist) {
3030             icodec = ist->st->codec;
3031
3032             ost->st->disposition          = ist->st->disposition;
3033             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
3034             codec->chroma_sample_location = icodec->chroma_sample_location;
3035         }
3036
3037         if (ost->stream_copy) {
3038             uint64_t extra_size;
3039
3040             av_assert0(ist && !ost->filter);
3041
3042             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
3043
3044             if (extra_size > INT_MAX) {
3045                 return AVERROR(EINVAL);
3046             }
3047
3048             /* if stream_copy is selected, no need to decode or encode */
3049             codec->codec_id   = icodec->codec_id;
3050             codec->codec_type = icodec->codec_type;
3051
3052             if (!codec->codec_tag) {
3053                 if (!oc->oformat->codec_tag ||
3054                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
3055                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
3056                     codec->codec_tag = icodec->codec_tag;
3057             }
3058
3059             codec->bit_rate       = icodec->bit_rate;
3060             codec->rc_max_rate    = icodec->rc_max_rate;
3061             codec->rc_buffer_size = icodec->rc_buffer_size;
3062             codec->field_order    = icodec->field_order;
3063             codec->extradata      = av_mallocz(extra_size);
3064             if (!codec->extradata) {
3065                 return AVERROR(ENOMEM);
3066             }
3067             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
3068             codec->extradata_size= icodec->extradata_size;
3069             codec->bits_per_coded_sample  = icodec->bits_per_coded_sample;
3070
3071             codec->time_base = ist->st->time_base;
3072             /*
3073              * Avi is a special case here because it supports variable fps but
3074              * having the fps and timebase differe significantly adds quite some
3075              * overhead
3076              */
3077             if(!strcmp(oc->oformat->name, "avi")) {
3078                 if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
3079                                  && av_q2d(ist->st->time_base) < 1.0/500
3080                     || copy_tb==0){
3081                     codec->time_base = icodec->time_base;
3082                     codec->time_base.num *= icodec->ticks_per_frame;
3083                     codec->time_base.den *= 2;
3084                     codec->ticks_per_frame = 2;
3085                 }
3086             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
3087                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
3088                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
3089             ) {
3090                 if(   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
3091                                 && av_q2d(ist->st->time_base) < 1.0/500
3092                    || copy_tb==0){
3093                     codec->time_base = icodec->time_base;
3094                     codec->time_base.num *= icodec->ticks_per_frame;
3095                 }
3096             }
3097             av_reduce(&codec->time_base.num, &codec->time_base.den,
3098                         codec->time_base.num, codec->time_base.den, INT_MAX);
3099
3100             switch (codec->codec_type) {
3101             case AVMEDIA_TYPE_AUDIO:
3102                 if (audio_volume != 256) {
3103                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
3104                     exit_program(1);
3105                 }
3106                 codec->channel_layout     = icodec->channel_layout;
3107                 codec->sample_rate        = icodec->sample_rate;
3108                 codec->channels           = icodec->channels;
3109                 codec->frame_size         = icodec->frame_size;
3110                 codec->audio_service_type = icodec->audio_service_type;
3111                 codec->block_align        = icodec->block_align;
3112                 if(codec->block_align == 1 && codec->codec_id == CODEC_ID_MP3)
3113                     codec->block_align= 0;
3114                 if(codec->codec_id == CODEC_ID_AC3)
3115                     codec->block_align= 0;
3116                 break;
3117             case AVMEDIA_TYPE_VIDEO:
3118                 codec->pix_fmt            = icodec->pix_fmt;
3119                 codec->width              = icodec->width;
3120                 codec->height             = icodec->height;
3121                 codec->has_b_frames       = icodec->has_b_frames;
3122                 if (!codec->sample_aspect_ratio.num) {
3123                     codec->sample_aspect_ratio   =
3124                     ost->st->sample_aspect_ratio =
3125                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
3126                         ist->st->codec->sample_aspect_ratio.num ?
3127                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
3128                 }
3129                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
3130                 break;
3131             case AVMEDIA_TYPE_SUBTITLE:
3132                 codec->width  = icodec->width;
3133                 codec->height = icodec->height;
3134                 break;
3135             case AVMEDIA_TYPE_DATA:
3136             case AVMEDIA_TYPE_ATTACHMENT:
3137                 break;
3138             default:
3139                 abort();
3140             }
3141         } else {
3142             if (!ost->enc)
3143                 ost->enc = avcodec_find_encoder(codec->codec_id);
3144             if (!ost->enc) {
3145                 /* should only happen when a default codec is not present. */
3146                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
3147                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
3148                 ret = AVERROR(EINVAL);
3149                 goto dump_format;
3150             }
3151
3152             if (ist)
3153                 ist->decoding_needed = 1;
3154             ost->encoding_needed = 1;
3155
3156             if (!ost->filter &&
3157                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3158                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
3159                     FilterGraph *fg;
3160                     fg = init_simple_filtergraph(ist, ost);
3161                     if (configure_simple_filtergraph(fg)) {
3162                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
3163                         exit(1);
3164                     }
3165             }
3166
3167             switch (codec->codec_type) {
3168             case AVMEDIA_TYPE_AUDIO:
3169                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
3170                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
3171                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
3172                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
3173                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
3174                 break;
3175             case AVMEDIA_TYPE_VIDEO:
3176                 if (ist && !ost->frame_rate.num)
3177                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
3178                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
3179                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
3180                     ost->frame_rate = ost->enc->supported_framerates[idx];
3181                 }
3182                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
3183                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
3184                    && (video_sync_method == VSYNC_CFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
3185                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
3186                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
3187                 }
3188                 for (j = 0; j < ost->forced_kf_count; j++)
3189                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
3190                                                          AV_TIME_BASE_Q,
3191                                                          codec->time_base);
3192
3193                 codec->width  = ost->filter->filter->inputs[0]->w;
3194                 codec->height = ost->filter->filter->inputs[0]->h;
3195                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
3196                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
3197                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
3198                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
3199                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
3200
3201                 if (codec->width   != icodec->width  ||
3202                     codec->height  != icodec->height ||
3203                     codec->pix_fmt != icodec->pix_fmt) {
3204                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
3205                 }
3206
3207                 break;
3208             case AVMEDIA_TYPE_SUBTITLE:
3209                 codec->time_base = (AVRational){1, 1000};
3210                 break;
3211             default:
3212                 abort();
3213                 break;
3214             }
3215             /* two pass mode */
3216             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
3217                 char logfilename[1024];
3218                 FILE *f;
3219
3220                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
3221                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
3222                          i);
3223                 if (!strcmp(ost->enc->name, "libx264")) {
3224                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
3225                 } else {
3226                     if (codec->flags & CODEC_FLAG_PASS2) {
3227                         char  *logbuffer;
3228                         size_t logbuffer_size;
3229                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
3230                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
3231                                    logfilename);
3232                             exit_program(1);
3233                         }
3234                         codec->stats_in = logbuffer;
3235                     }
3236                     if (codec->flags & CODEC_FLAG_PASS1) {
3237                         f = fopen(logfilename, "wb");
3238                         if (!f) {
3239                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
3240                                 logfilename, strerror(errno));
3241                             exit_program(1);
3242                         }
3243                         ost->logfile = f;
3244                     }
3245                 }
3246             }
3247         }
3248     }
3249
3250     /* open each encoder */
3251     for (i = 0; i < nb_output_streams; i++) {
3252         ost = output_streams[i];
3253         if (ost->encoding_needed) {
3254             AVCodec      *codec = ost->enc;
3255             AVCodecContext *dec = NULL;
3256
3257             if ((ist = get_input_stream(ost)))
3258                 dec = ist->st->codec;
3259             if (dec && dec->subtitle_header) {
3260                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
3261                 if (!ost->st->codec->subtitle_header) {
3262                     ret = AVERROR(ENOMEM);
3263                     goto dump_format;
3264                 }
3265                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
3266                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
3267             }
3268             if (!av_dict_get(ost->opts, "threads", NULL, 0))
3269                 av_dict_set(&ost->opts, "threads", "auto", 0);
3270             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
3271                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
3272                         ost->file_index, ost->index);
3273                 ret = AVERROR(EINVAL);
3274                 goto dump_format;
3275             }
3276             assert_codec_experimental(ost->st->codec, 1);
3277             assert_avoptions(ost->opts);
3278             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
3279                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
3280                                              " It takes bits/s as argument, not kbits/s\n");
3281             extra_size += ost->st->codec->extradata_size;
3282
3283             if (ost->st->codec->me_threshold)
3284                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
3285         }
3286     }
3287
3288     /* init input streams */
3289     for (i = 0; i < nb_input_streams; i++)
3290         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
3291             goto dump_format;
3292
3293     /* discard unused programs */
3294     for (i = 0; i < nb_input_files; i++) {
3295         InputFile *ifile = input_files[i];
3296         for (j = 0; j < ifile->ctx->nb_programs; j++) {
3297             AVProgram *p = ifile->ctx->programs[j];
3298             int discard  = AVDISCARD_ALL;
3299
3300             for (k = 0; k < p->nb_stream_indexes; k++)
3301                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
3302                     discard = AVDISCARD_DEFAULT;
3303                     break;
3304                 }
3305             p->discard = discard;
3306         }
3307     }
3308
3309     /* open files and write file headers */
3310     for (i = 0; i < nb_output_files; i++) {
3311         oc = output_files[i]->ctx;
3312         oc->interrupt_callback = int_cb;
3313         if (avformat_write_header(oc, &output_files[i]->opts) < 0) {
3314             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?)", i);
3315             ret = AVERROR(EINVAL);
3316             goto dump_format;
3317         }
3318 //         assert_avoptions(output_files[i]->opts);
3319         if (strcmp(oc->oformat->name, "rtp")) {
3320             want_sdp = 0;
3321         }
3322     }
3323
3324  dump_format:
3325     /* dump the file output parameters - cannot be done before in case
3326        of stream copy */
3327     for (i = 0; i < nb_output_files; i++) {
3328         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
3329     }
3330
3331     /* dump the stream mapping */
3332     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
3333     for (i = 0; i < nb_input_streams; i++) {
3334         ist = input_streams[i];
3335
3336         for (j = 0; j < ist->nb_filters; j++) {
3337             AVFilterLink *link = ist->filters[j]->filter->outputs[0];
3338             if (ist->filters[j]->graph->graph_desc) {
3339                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
3340                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
3341                        link->dst->filter->name);
3342                 if (link->dst->input_count > 1)
3343                     av_log(NULL, AV_LOG_INFO, ":%s", link->dstpad->name);
3344                 if (nb_filtergraphs > 1)
3345                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
3346                 av_log(NULL, AV_LOG_INFO, "\n");
3347             }
3348         }
3349     }
3350
3351     for (i = 0; i < nb_output_streams; i++) {
3352         ost = output_streams[i];
3353
3354         if (ost->attachment_filename) {
3355             /* an attached file */
3356             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
3357                    ost->attachment_filename, ost->file_index, ost->index);
3358             continue;
3359         }
3360
3361         if (ost->filter && ost->filter->graph->graph_desc) {
3362             /* output from a complex graph */
3363             AVFilterLink *link = ost->filter->filter->inputs[0];
3364             av_log(NULL, AV_LOG_INFO, "  %s", link->src->filter->name);
3365             if (link->src->output_count > 1)
3366                 av_log(NULL, AV_LOG_INFO, ":%s", link->srcpad->name);
3367             if (nb_filtergraphs > 1)
3368                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
3369
3370             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
3371                    ost->index, ost->enc ? ost->enc->name : "?");
3372             continue;
3373         }
3374
3375         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
3376                input_streams[ost->source_index]->file_index,
3377                input_streams[ost->source_index]->st->index,
3378                ost->file_index,
3379                ost->index);
3380         if (ost->sync_ist != input_streams[ost->source_index])
3381             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
3382                    ost->sync_ist->file_index,
3383                    ost->sync_ist->st->index);
3384         if (ost->stream_copy)
3385             av_log(NULL, AV_LOG_INFO, " (copy)");
3386         else
3387             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
3388                    input_streams[ost->source_index]->dec->name : "?",
3389                    ost->enc ? ost->enc->name : "?");
3390         av_log(NULL, AV_LOG_INFO, "\n");
3391     }
3392
3393     if (ret) {
3394         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
3395         return ret;
3396     }
3397
3398     if (want_sdp) {
3399         print_sdp();
3400     }
3401
3402     return 0;
3403 }
3404
3405 /*
3406  * The following code is the main loop of the file converter
3407  */
3408 static int transcode(void)
3409 {
3410     int ret, i;
3411     AVFormatContext *is, *os;
3412     OutputStream *ost;
3413     InputStream *ist;
3414     uint8_t *no_packet;
3415     int no_packet_count = 0;
3416     int64_t timer_start;
3417     int key;
3418
3419     if (!(no_packet = av_mallocz(nb_input_files)))
3420         exit_program(1);
3421
3422     ret = transcode_init();
3423     if (ret < 0)
3424         goto fail;
3425
3426     if (!using_stdin) {
3427         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
3428     }
3429
3430     timer_start = av_gettime();
3431
3432     for (; received_sigterm == 0;) {
3433         int file_index, ist_index, past_recording_time = 1;
3434         AVPacket pkt;
3435         int64_t ipts_min;
3436         int64_t cur_time= av_gettime();
3437
3438         ipts_min = INT64_MAX;
3439         /* if 'q' pressed, exits */
3440         if (!using_stdin) {
3441             static int64_t last_time;
3442             if (received_nb_signals)
3443                 break;
3444             /* read_key() returns 0 on EOF */
3445             if(cur_time - last_time >= 100000 && !run_as_daemon){
3446                 key =  read_key();
3447                 last_time = cur_time;
3448             }else
3449                 key = -1;
3450             if (key == 'q')
3451                 break;
3452             if (key == '+') av_log_set_level(av_log_get_level()+10);
3453             if (key == '-') av_log_set_level(av_log_get_level()-10);
3454             if (key == 's') qp_hist     ^= 1;
3455             if (key == 'h'){
3456                 if (do_hex_dump){
3457                     do_hex_dump = do_pkt_dump = 0;
3458                 } else if(do_pkt_dump){
3459                     do_hex_dump = 1;
3460                 } else
3461                     do_pkt_dump = 1;
3462                 av_log_set_level(AV_LOG_DEBUG);
3463             }
3464             if (key == 'c' || key == 'C'){
3465                 char buf[4096], target[64], command[256], arg[256] = {0};
3466                 double time;
3467                 int k, n = 0;
3468                 fprintf(stderr, "\nEnter command: <target> <time> <command>[ <argument>]\n");
3469                 i = 0;
3470                 while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3471                     if (k > 0)
3472                         buf[i++] = k;
3473                 buf[i] = 0;
3474                 if (k > 0 &&
3475                     (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
3476                     av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
3477                            target, time, command, arg);
3478                     for (i = 0; i < nb_filtergraphs; i++) {
3479                         FilterGraph *fg = filtergraphs[i];
3480                         if (fg->graph) {
3481                             if (time < 0) {
3482                                 ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
3483                                                                   key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
3484                                 fprintf(stderr, "Command reply for stream %d: ret:%d res:%s\n", i, ret, buf);
3485                             } else {
3486                                 ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
3487                             }
3488                         }
3489                     }
3490                 } else {
3491                     av_log(NULL, AV_LOG_ERROR,
3492                            "Parse error, at least 3 arguments were expected, "
3493                            "only %d given in string '%s'\n", n, buf);
3494                 }
3495             }
3496             if (key == 'd' || key == 'D'){
3497                 int debug=0;
3498                 if(key == 'D') {
3499                     debug = input_streams[0]->st->codec->debug<<1;
3500                     if(!debug) debug = 1;
3501                     while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
3502                         debug += debug;
3503                 }else
3504                     if(scanf("%d", &debug)!=1)
3505                         fprintf(stderr,"error parsing debug value\n");
3506                 for(i=0;i<nb_input_streams;i++) {
3507                     input_streams[i]->st->codec->debug = debug;
3508                 }
3509                 for(i=0;i<nb_output_streams;i++) {
3510                     ost = output_streams[i];
3511                     ost->st->codec->debug = debug;
3512                 }
3513                 if(debug) av_log_set_level(AV_LOG_DEBUG);
3514                 fprintf(stderr,"debug=%d\n", debug);
3515             }
3516             if (key == '?'){
3517                 fprintf(stderr, "key    function\n"
3518                                 "?      show this help\n"
3519                                 "+      increase verbosity\n"
3520                                 "-      decrease verbosity\n"
3521                                 "c      Send command to filtergraph\n"
3522                                 "D      cycle through available debug modes\n"
3523                                 "h      dump packets/hex press to cycle through the 3 states\n"
3524                                 "q      quit\n"
3525                                 "s      Show QP histogram\n"
3526                 );
3527             }
3528         }
3529
3530         /* check if there's any stream where output is still needed */
3531         for (i = 0; i < nb_output_streams; i++) {
3532             OutputFile *of;
3533             ost = output_streams[i];
3534             of  = output_files[ost->file_index];
3535             os  = output_files[ost->file_index]->ctx;
3536             if (ost->is_past_recording_time ||
3537                 (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3538                 continue;
3539             if (ost->frame_number >= ost->max_frames) {
3540                 int j;
3541                 for (j = 0; j < of->ctx->nb_streams; j++)
3542                     output_streams[of->ost_index + j]->is_past_recording_time = 1;
3543                 continue;
3544             }
3545             past_recording_time = 0;
3546         }
3547         if (past_recording_time)
3548             break;
3549
3550         /* select the stream that we must read now by looking at the
3551            smallest output pts */
3552         file_index = -1;
3553         for (i = 0; i < nb_input_streams; i++) {
3554             int64_t ipts;
3555             ist = input_streams[i];
3556             ipts = ist->pts;
3557             if (ist->discard || no_packet[ist->file_index])
3558                 continue;
3559             if (!input_files[ist->file_index]->eof_reached) {
3560                 if (ipts < ipts_min) {
3561                     ipts_min = ipts;
3562                     file_index = ist->file_index;
3563                 }
3564             }
3565         }
3566         /* if none, if is finished */
3567         if (file_index < 0) {
3568             if (no_packet_count) {
3569                 no_packet_count = 0;
3570                 memset(no_packet, 0, nb_input_files);
3571                 usleep(10000);
3572                 continue;
3573             }
3574             break;
3575         }
3576
3577         /* read a frame from it and output it in the fifo */
3578         is  = input_files[file_index]->ctx;
3579         ret = av_read_frame(is, &pkt);
3580         if (ret == AVERROR(EAGAIN)) {
3581             no_packet[file_index] = 1;
3582             no_packet_count++;
3583             continue;
3584         }
3585         if (ret < 0) {
3586             input_files[file_index]->eof_reached = 1;
3587
3588             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
3589                 ist = input_streams[input_files[file_index]->ist_index + i];
3590                 if (ist->decoding_needed)
3591                     output_packet(ist, NULL);
3592             }
3593
3594             if (opt_shortest)
3595                 break;
3596             else
3597                 continue;
3598         }
3599
3600         no_packet_count = 0;
3601         memset(no_packet, 0, nb_input_files);
3602
3603         if (do_pkt_dump) {
3604             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3605                              is->streams[pkt.stream_index]);
3606         }
3607         /* the following test is needed in case new streams appear
3608            dynamically in stream : we ignore them */
3609         if (pkt.stream_index >= input_files[file_index]->nb_streams)
3610             goto discard_packet;
3611         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
3612         ist = input_streams[ist_index];
3613         if (ist->discard)
3614             goto discard_packet;
3615
3616         if (pkt.dts != AV_NOPTS_VALUE)
3617             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3618         if (pkt.pts != AV_NOPTS_VALUE)
3619             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3620
3621         if (pkt.pts != AV_NOPTS_VALUE)
3622             pkt.pts *= ist->ts_scale;
3623         if (pkt.dts != AV_NOPTS_VALUE)
3624             pkt.dts *= ist->ts_scale;
3625
3626         if (debug_ts) {
3627             av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
3628                     "next_dts:%s next_dts_time:%s next_pts:%s next_pts_time:%s  pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%"PRId64"\n",
3629                     ist_index, av_get_media_type_string(ist->st->codec->codec_type),
3630                     av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &ist->st->time_base),
3631                     av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &ist->st->time_base),
3632                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3633                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3634                     input_files[ist->file_index]->ts_offset);
3635         }
3636
3637         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE && !copy_ts) {
3638             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3639             int64_t delta   = pkt_dts - ist->next_dts;
3640             if (is->iformat->flags & AVFMT_TS_DISCONT) {
3641             if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3642                 (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3643                  ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3644                 pkt_dts+1<ist->pts){
3645                 input_files[ist->file_index]->ts_offset -= delta;
3646                 av_log(NULL, AV_LOG_DEBUG,
3647                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3648                        delta, input_files[ist->file_index]->ts_offset);
3649                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3650                 if (pkt.pts != AV_NOPTS_VALUE)
3651                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3652             }
3653             } else {
3654                 if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3655                     (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3656                      pkt_dts+1<ist->pts){
3657                     av_log(NULL, AV_LOG_WARNING, "DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n", pkt.dts, ist->next_dts, pkt.stream_index);
3658                     pkt.dts = AV_NOPTS_VALUE;
3659                 }
3660                 if (pkt.pts != AV_NOPTS_VALUE){
3661                     int64_t pkt_pts = av_rescale_q(pkt.pts, ist->st->time_base, AV_TIME_BASE_Q);
3662                     delta   = pkt_pts - ist->next_dts;
3663                     if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3664                         (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3665                         pkt_pts+1<ist->pts) {
3666                         av_log(NULL, AV_LOG_WARNING, "PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n", pkt.pts, ist->next_dts, pkt.stream_index);
3667                         pkt.pts = AV_NOPTS_VALUE;
3668                     }
3669                 }
3670             }
3671         }
3672
3673         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
3674         if (output_packet(ist, &pkt) < 0 ||
3675             ((ret = poll_filters()) < 0 && ret != AVERROR_EOF)) {
3676             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
3677                    ist->file_index, ist->st->index);
3678             if (exit_on_error)
3679                 exit_program(1);
3680             av_free_packet(&pkt);
3681             continue;
3682         }
3683
3684     discard_packet:
3685         av_free_packet(&pkt);
3686
3687         /* dump report by using the output first video and audio streams */
3688         print_report(0, timer_start, cur_time);
3689     }
3690
3691     /* at the end of stream, we must flush the decoder buffers */
3692     for (i = 0; i < nb_input_streams; i++) {
3693         ist = input_streams[i];
3694         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3695             output_packet(ist, NULL);
3696         }
3697     }
3698     poll_filters();
3699     flush_encoders();
3700
3701     term_exit();
3702
3703     /* write the trailer if needed and close file */
3704     for (i = 0; i < nb_output_files; i++) {
3705         os = output_files[i]->ctx;
3706         av_write_trailer(os);
3707     }
3708
3709     /* dump report by using the first video and audio streams */
3710     print_report(1, timer_start, av_gettime());
3711
3712     /* close each encoder */
3713     for (i = 0; i < nb_output_streams; i++) {
3714         ost = output_streams[i];
3715         if (ost->encoding_needed) {
3716             av_freep(&ost->st->codec->stats_in);
3717             avcodec_close(ost->st->codec);
3718         }
3719     }
3720
3721     /* close each decoder */
3722     for (i = 0; i < nb_input_streams; i++) {
3723         ist = input_streams[i];
3724         if (ist->decoding_needed) {
3725             avcodec_close(ist->st->codec);
3726         }
3727     }
3728
3729     /* finished ! */
3730     ret = 0;
3731
3732  fail:
3733     av_freep(&no_packet);
3734
3735     if (output_streams) {
3736         for (i = 0; i < nb_output_streams; i++) {
3737             ost = output_streams[i];
3738             if (ost) {
3739                 if (ost->stream_copy)
3740                     av_freep(&ost->st->codec->extradata);
3741                 if (ost->logfile) {
3742                     fclose(ost->logfile);
3743                     ost->logfile = NULL;
3744                 }
3745                 av_freep(&ost->st->codec->subtitle_header);
3746                 av_free(ost->forced_kf_pts);
3747                 av_dict_free(&ost->opts);
3748             }
3749         }
3750     }
3751     return ret;
3752 }
3753
3754 static int opt_frame_crop(const char *opt, const char *arg)
3755 {
3756     av_log(NULL, AV_LOG_FATAL, "Option '%s' has been removed, use the crop filter instead\n", opt);
3757     return AVERROR(EINVAL);
3758 }
3759
3760 static int opt_pad(const char *opt, const char *arg)
3761 {
3762     av_log(NULL, AV_LOG_FATAL, "Option '%s' has been removed, use the pad filter instead\n", opt);
3763     return -1;
3764 }
3765
3766 static int opt_video_channel(const char *opt, const char *arg)
3767 {
3768     av_log(NULL, AV_LOG_WARNING, "This option is deprecated, use -channel.\n");
3769     return opt_default("channel", arg);
3770 }
3771
3772 static int opt_video_standard(const char *opt, const char *arg)
3773 {
3774     av_log(NULL, AV_LOG_WARNING, "This option is deprecated, use -standard.\n");
3775     return opt_default("standard", arg);
3776 }
3777
3778 static int opt_audio_codec(OptionsContext *o, const char *opt, const char *arg)
3779 {
3780     audio_codec_name = arg;
3781     return parse_option(o, "codec:a", arg, options);
3782 }
3783
3784 static int opt_video_codec(OptionsContext *o, const char *opt, const char *arg)
3785 {
3786     video_codec_name = arg;
3787     return parse_option(o, "codec:v", arg, options);
3788 }
3789
3790 static int opt_subtitle_codec(OptionsContext *o, const char *opt, const char *arg)
3791 {
3792     subtitle_codec_name = arg;
3793     return parse_option(o, "codec:s", arg, options);
3794 }
3795
3796 static int opt_data_codec(OptionsContext *o, const char *opt, const char *arg)
3797 {
3798     return parse_option(o, "codec:d", arg, options);
3799 }
3800
3801 static int opt_map(OptionsContext *o, const char *opt, const char *arg)
3802 {
3803     StreamMap *m = NULL;
3804     int i, negative = 0, file_idx;
3805     int sync_file_idx = -1, sync_stream_idx = 0;
3806     char *p, *sync;
3807     char *map;
3808
3809     if (*arg == '-') {
3810         negative = 1;
3811         arg++;
3812     }
3813     map = av_strdup(arg);
3814
3815     /* parse sync stream first, just pick first matching stream */
3816     if (sync = strchr(map, ',')) {
3817         *sync = 0;
3818         sync_file_idx = strtol(sync + 1, &sync, 0);
3819         if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
3820             av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
3821             exit_program(1);
3822         }
3823         if (*sync)
3824             sync++;
3825         for (i = 0; i < input_files[sync_file_idx]->nb_streams; i++)
3826             if (check_stream_specifier(input_files[sync_file_idx]->ctx,
3827                                        input_files[sync_file_idx]->ctx->streams[i], sync) == 1) {
3828                 sync_stream_idx = i;
3829                 break;
3830             }
3831         if (i == input_files[sync_file_idx]->nb_streams) {
3832             av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
3833                                        "match any streams.\n", arg);
3834             exit_program(1);
3835         }
3836     }
3837
3838
3839     if (map[0] == '[') {
3840         /* this mapping refers to lavfi output */
3841         const char *c = map + 1;
3842         o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3843                                     &o->nb_stream_maps, o->nb_stream_maps + 1);
3844         m = &o->stream_maps[o->nb_stream_maps - 1];
3845         m->linklabel = av_get_token(&c, "]");
3846         if (!m->linklabel) {
3847             av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
3848             exit_program(1);
3849         }
3850     } else {
3851         file_idx = strtol(map, &p, 0);
3852         if (file_idx >= nb_input_files || file_idx < 0) {
3853             av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
3854             exit_program(1);
3855         }
3856         if (negative)
3857             /* disable some already defined maps */
3858             for (i = 0; i < o->nb_stream_maps; i++) {
3859                 m = &o->stream_maps[i];
3860                 if (file_idx == m->file_index &&
3861                     check_stream_specifier(input_files[m->file_index]->ctx,
3862                                            input_files[m->file_index]->ctx->streams[m->stream_index],
3863                                            *p == ':' ? p + 1 : p) > 0)
3864                     m->disabled = 1;
3865             }
3866         else
3867             for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
3868                 if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
3869                             *p == ':' ? p + 1 : p) <= 0)
3870                     continue;
3871                 o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3872                                             &o->nb_stream_maps, o->nb_stream_maps + 1);
3873                 m = &o->stream_maps[o->nb_stream_maps - 1];
3874
3875                 m->file_index   = file_idx;
3876                 m->stream_index = i;
3877
3878                 if (sync_file_idx >= 0) {
3879                     m->sync_file_index   = sync_file_idx;
3880                     m->sync_stream_index = sync_stream_idx;
3881                 } else {
3882                     m->sync_file_index   = file_idx;
3883                     m->sync_stream_index = i;
3884                 }
3885             }
3886     }
3887
3888     if (!m) {
3889         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
3890         exit_program(1);
3891     }
3892
3893     av_freep(&map);
3894     return 0;
3895 }
3896
3897 static int opt_attach(OptionsContext *o, const char *opt, const char *arg)
3898 {
3899     o->attachments = grow_array(o->attachments, sizeof(*o->attachments),
3900                                 &o->nb_attachments, o->nb_attachments + 1);
3901     o->attachments[o->nb_attachments - 1] = arg;
3902     return 0;
3903 }
3904
3905 static int opt_map_channel(OptionsContext *o, const char *opt, const char *arg)
3906 {
3907     int n;
3908     AVStream *st;
3909     AudioChannelMap *m;
3910
3911     o->audio_channel_maps =
3912         grow_array(o->audio_channel_maps, sizeof(*o->audio_channel_maps),
3913                    &o->nb_audio_channel_maps, o->nb_audio_channel_maps + 1);
3914     m = &o->audio_channel_maps[o->nb_audio_channel_maps - 1];
3915
3916     /* muted channel syntax */
3917     n = sscanf(arg, "%d:%d.%d", &m->channel_idx, &m->ofile_idx, &m->ostream_idx);
3918     if ((n == 1 || n == 3) && m->channel_idx == -1) {
3919         m->file_idx = m->stream_idx = -1;
3920         if (n == 1)
3921             m->ofile_idx = m->ostream_idx = -1;
3922         return 0;
3923     }
3924
3925     /* normal syntax */
3926     n = sscanf(arg, "%d.%d.%d:%d.%d",
3927                &m->file_idx,  &m->stream_idx, &m->channel_idx,
3928                &m->ofile_idx, &m->ostream_idx);
3929
3930     if (n != 3 && n != 5) {
3931         av_log(NULL, AV_LOG_FATAL, "Syntax error, mapchan usage: "
3932                "[file.stream.channel|-1][:syncfile:syncstream]\n");
3933         exit_program(1);
3934     }
3935
3936     if (n != 5) // only file.stream.channel specified
3937         m->ofile_idx = m->ostream_idx = -1;
3938
3939     /* check input */
3940     if (m->file_idx < 0 || m->file_idx >= nb_input_files) {
3941         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid input file index: %d\n",
3942                m->file_idx);
3943         exit_program(1);
3944     }
3945     if (m->stream_idx < 0 ||
3946         m->stream_idx >= input_files[m->file_idx]->nb_streams) {
3947         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid input file stream index #%d.%d\n",
3948                m->file_idx, m->stream_idx);
3949         exit_program(1);
3950     }
3951     st = input_files[m->file_idx]->ctx->streams[m->stream_idx];
3952     if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
3953         av_log(NULL, AV_LOG_FATAL, "mapchan: stream #%d.%d is not an audio stream.\n",
3954                m->file_idx, m->stream_idx);
3955         exit_program(1);
3956     }
3957     if (m->channel_idx < 0 || m->channel_idx >= st->codec->channels) {
3958         av_log(NULL, AV_LOG_FATAL, "mapchan: invalid audio channel #%d.%d.%d\n",
3959                m->file_idx, m->stream_idx, m->channel_idx);
3960         exit_program(1);
3961     }
3962     return 0;
3963 }
3964
3965 /**
3966  * Parse a metadata specifier in arg.
3967  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
3968  * @param index for type c/p, chapter/program index is written here
3969  * @param stream_spec for type s, the stream specifier is written here
3970  */
3971 static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
3972 {
3973     if (*arg) {
3974         *type = *arg;
3975         switch (*arg) {
3976         case 'g':
3977             break;
3978         case 's':
3979             if (*(++arg) && *arg != ':') {
3980                 av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
3981                 exit_program(1);
3982             }
3983             *stream_spec = *arg == ':' ? arg + 1 : "";
3984             break;
3985         case 'c':
3986         case 'p':
3987             if (*(++arg) == ':')
3988                 *index = strtol(++arg, NULL, 0);
3989             break;
3990         default:
3991             av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
3992             exit_program(1);
3993         }
3994     } else
3995         *type = 'g';
3996 }
3997
3998 static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
3999 {
4000     AVDictionary **meta_in = NULL;
4001     AVDictionary **meta_out = NULL;
4002     int i, ret = 0;
4003     char type_in, type_out;
4004     const char *istream_spec = NULL, *ostream_spec = NULL;
4005     int idx_in = 0, idx_out = 0;
4006
4007     parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
4008     parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
4009
4010     if (!ic) {
4011         if (type_out == 'g' || !*outspec)
4012             o->metadata_global_manual = 1;
4013         if (type_out == 's' || !*outspec)
4014             o->metadata_streams_manual = 1;
4015         if (type_out == 'c' || !*outspec)
4016             o->metadata_chapters_manual = 1;
4017         return 0;
4018     }
4019
4020     if (type_in == 'g' || type_out == 'g')
4021         o->metadata_global_manual = 1;
4022     if (type_in == 's' || type_out == 's')
4023         o->metadata_streams_manual = 1;
4024     if (type_in == 'c' || type_out == 'c')
4025         o->metadata_chapters_manual = 1;
4026
4027 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
4028     if ((index) < 0 || (index) >= (nb_elems)) {\
4029         av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
4030                 (desc), (index));\
4031         exit_program(1);\
4032     }
4033
4034 #define SET_DICT(type, meta, context, index)\
4035         switch (type) {\
4036         case 'g':\
4037             meta = &context->metadata;\
4038             break;\
4039         case 'c':\
4040             METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
4041             meta = &context->chapters[index]->metadata;\
4042             break;\
4043         case 'p':\
4044             METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
4045             meta = &context->programs[index]->metadata;\
4046             break;\
4047         }\
4048
4049     SET_DICT(type_in, meta_in, ic, idx_in);
4050     SET_DICT(type_out, meta_out, oc, idx_out);
4051
4052     /* for input streams choose first matching stream */
4053     if (type_in == 's') {
4054         for (i = 0; i < ic->nb_streams; i++) {
4055             if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
4056                 meta_in = &ic->streams[i]->metadata;
4057                 break;
4058             } else if (ret < 0)
4059                 exit_program(1);
4060         }
4061         if (!meta_in) {
4062             av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
4063             exit_program(1);
4064         }
4065     }
4066
4067     if (type_out == 's') {
4068         for (i = 0; i < oc->nb_streams; i++) {
4069             if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
4070                 meta_out = &oc->streams[i]->metadata;
4071                 av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
4072             } else if (ret < 0)
4073                 exit_program(1);
4074         }
4075     } else
4076         av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
4077
4078     return 0;
4079 }
4080
4081 static int opt_recording_timestamp(OptionsContext *o, const char *opt, const char *arg)
4082 {
4083     char buf[128];
4084     int64_t recording_timestamp = parse_time_or_die(opt, arg, 0) / 1E6;
4085     struct tm time = *gmtime((time_t*)&recording_timestamp);
4086     strftime(buf, sizeof(buf), "creation_time=%FT%T%z", &time);
4087     parse_option(o, "metadata", buf, options);
4088
4089     av_log(NULL, AV_LOG_WARNING, "%s is deprecated, set the 'creation_time' metadata "
4090                                  "tag instead.\n", opt);
4091     return 0;
4092 }
4093
4094 static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
4095 {
4096     const char *codec_string = encoder ? "encoder" : "decoder";
4097     AVCodec *codec;
4098
4099     codec = encoder ?
4100         avcodec_find_encoder_by_name(name) :
4101         avcodec_find_decoder_by_name(name);
4102     if (!codec) {
4103         av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
4104         exit_program(1);
4105     }
4106     if (codec->type != type) {
4107         av_log(NULL, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
4108         exit_program(1);
4109     }
4110     return codec;
4111 }
4112
4113 static AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVStream *st)
4114 {
4115     char *codec_name = NULL;
4116
4117     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
4118     if (codec_name) {
4119         AVCodec *codec = find_codec_or_die(codec_name, st->codec->codec_type, 0);
4120         st->codec->codec_id = codec->id;
4121         return codec;
4122     } else
4123         return avcodec_find_decoder(st->codec->codec_id);
4124 }
4125
4126 /**
4127  * Add all the streams from the given input file to the global
4128  * list of input streams.
4129  */
4130 static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
4131 {
4132     int i;
4133     char *next, *codec_tag = NULL;
4134
4135     for (i = 0; i < ic->nb_streams; i++) {
4136         AVStream *st = ic->streams[i];
4137         AVCodecContext *dec = st->codec;
4138         InputStream *ist = av_mallocz(sizeof(*ist));
4139
4140         if (!ist)
4141             exit_program(1);
4142
4143         input_streams = grow_array(input_streams, sizeof(*input_streams), &nb_input_streams, nb_input_streams + 1);
4144         input_streams[nb_input_streams - 1] = ist;
4145
4146         ist->st = st;
4147         ist->file_index = nb_input_files;
4148         ist->discard = 1;
4149         st->discard  = AVDISCARD_ALL;
4150         ist->opts = filter_codec_opts(codec_opts, choose_decoder(o, ic, st), ic, st);
4151
4152         ist->ts_scale = 1.0;
4153         MATCH_PER_STREAM_OPT(ts_scale, dbl, ist->ts_scale, ic, st);
4154
4155         MATCH_PER_STREAM_OPT(codec_tags, str, codec_tag, ic, st);
4156         if (codec_tag) {
4157             uint32_t tag = strtol(codec_tag, &next, 0);
4158             if (*next)
4159                 tag = AV_RL32(codec_tag);
4160             st->codec->codec_tag = tag;
4161         }
4162
4163         ist->dec = choose_decoder(o, ic, st);
4164
4165         switch (dec->codec_type) {
4166         case AVMEDIA_TYPE_VIDEO:
4167             if(!ist->dec)
4168                 ist->dec = avcodec_find_decoder(dec->codec_id);
4169             if (dec->lowres) {
4170                 dec->flags |= CODEC_FLAG_EMU_EDGE;
4171             }
4172
4173             ist->resample_height  = dec->height;
4174             ist->resample_width   = dec->width;
4175             ist->resample_pix_fmt = dec->pix_fmt;
4176
4177             break;
4178         case AVMEDIA_TYPE_AUDIO:
4179             guess_input_channel_layout(ist);
4180
4181             ist->resample_sample_fmt     = dec->sample_fmt;
4182             ist->resample_sample_rate    = dec->sample_rate;
4183             ist->resample_channels       = dec->channels;
4184             ist->resample_channel_layout = dec->channel_layout;
4185
4186             break;
4187         case AVMEDIA_TYPE_DATA:
4188         case AVMEDIA_TYPE_SUBTITLE:
4189             if(!ist->dec)
4190                 ist->dec = avcodec_find_decoder(dec->codec_id);
4191             break;
4192         case AVMEDIA_TYPE_ATTACHMENT:
4193         case AVMEDIA_TYPE_UNKNOWN:
4194             break;
4195         default:
4196             abort();
4197         }
4198     }
4199 }
4200
4201 static void assert_file_overwrite(const char *filename)
4202 {
4203     if ((!file_overwrite || no_file_overwrite) &&
4204         (strchr(filename, ':') == NULL || filename[1] == ':' ||
4205          av_strstart(filename, "file:", NULL))) {
4206         if (avio_check(filename, 0) == 0) {
4207             if (!using_stdin && (!no_file_overwrite || file_overwrite)) {
4208                 fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
4209                 fflush(stderr);
4210                 term_exit();
4211                 signal(SIGINT, SIG_DFL);
4212                 if (!read_yesno()) {
4213                     av_log(NULL, AV_LOG_FATAL, "Not overwriting - exiting\n");
4214                     exit_program(1);
4215                 }
4216                 term_init();
4217             }
4218             else {
4219                 av_log(NULL, AV_LOG_FATAL, "File '%s' already exists. Exiting.\n", filename);
4220                 exit_program(1);
4221             }
4222         }
4223     }
4224 }
4225
4226 static void dump_attachment(AVStream *st, const char *filename)
4227 {
4228     int ret;
4229     AVIOContext *out = NULL;
4230     AVDictionaryEntry *e;
4231
4232     if (!st->codec->extradata_size) {
4233         av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
4234                nb_input_files - 1, st->index);
4235         return;
4236     }
4237     if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
4238         filename = e->value;
4239     if (!*filename) {
4240         av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
4241                "in stream #%d:%d.\n", nb_input_files - 1, st->index);
4242         exit_program(1);
4243     }
4244
4245     assert_file_overwrite(filename);
4246
4247     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
4248         av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
4249                filename);
4250         exit_program(1);
4251     }
4252
4253     avio_write(out, st->codec->extradata, st->codec->extradata_size);
4254     avio_flush(out);
4255     avio_close(out);
4256 }
4257
4258 static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
4259 {
4260     AVFormatContext *ic;
4261     AVInputFormat *file_iformat = NULL;
4262     int err, i, ret;
4263     int64_t timestamp;
4264     uint8_t buf[128];
4265     AVDictionary **opts;
4266     int orig_nb_streams;                     // number of streams before avformat_find_stream_info
4267
4268     if (o->format) {
4269         if (!(file_iformat = av_find_input_format(o->format))) {
4270             av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
4271             exit_program(1);
4272         }
4273     }
4274
4275     if (!strcmp(filename, "-"))
4276         filename = "pipe:";
4277
4278     using_stdin |= !strncmp(filename, "pipe:", 5) ||
4279