ffmpeg: set the video filters timebase to the demuxers.
[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              ist->st->time_base.num, ist->st->time_base.den,
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,
1367                      ist->st->time_base.num, ist->st->time_base.den,
1368                      sar.num, sar.den);
1369             filter = avfilter_get_by_name("buffer");
1370             break;
1371         case AVMEDIA_TYPE_AUDIO:
1372             snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:"
1373                      "sample_fmt=%s:channel_layout=0x%"PRIx64,
1374                      ist->st->time_base.num, ist->st->time_base.den,
1375                      ist->st->codec->sample_rate,
1376                      av_get_sample_fmt_name(ist->st->codec->sample_fmt),
1377                      ist->st->codec->channel_layout);
1378             filter = avfilter_get_by_name("abuffer");
1379             break;
1380         default:
1381             av_assert0(0);
1382         }
1383
1384         if ((ret = avfilter_graph_create_filter(&ifilter->filter,
1385                                                 filter, cur->name,
1386                                                 args, NULL, fg->graph)) < 0)
1387             return ret;
1388         if ((ret = avfilter_link(ifilter->filter, 0,
1389                                  cur->filter_ctx, cur->pad_idx)) < 0)
1390             return ret;
1391     }
1392     avfilter_inout_free(&inputs);
1393
1394     if (!init) {
1395         /* we already know the mappings between lavfi outputs and output streams,
1396          * so we can finish the setup */
1397         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1398             configure_output_filter(fg, fg->outputs[i], cur);
1399         avfilter_inout_free(&outputs);
1400
1401         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1402             return ret;
1403     } else {
1404         /* wait until output mappings are processed */
1405         for (cur = outputs; cur;) {
1406             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
1407                                      &fg->nb_outputs, fg->nb_outputs + 1);
1408             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
1409                 exit_program(1);
1410             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
1411             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
1412             cur = cur->next;
1413             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
1414         }
1415     }
1416
1417     return 0;
1418 }
1419
1420 static int configure_complex_filters(void)
1421 {
1422     int i, ret = 0;
1423
1424     for (i = 0; i < nb_filtergraphs; i++)
1425         if (!filtergraphs[i]->graph &&
1426             (ret = configure_complex_filter(filtergraphs[i])) < 0)
1427             return ret;
1428     return 0;
1429 }
1430
1431 static int configure_filtergraph(FilterGraph *fg)
1432 {
1433     return fg->graph_desc ? configure_complex_filter(fg) :
1434                             configure_simple_filtergraph(fg);
1435 }
1436
1437 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1438 {
1439     int i;
1440     for (i = 0; i < fg->nb_inputs; i++)
1441         if (fg->inputs[i]->ist == ist)
1442             return 1;
1443     return 0;
1444 }
1445
1446 static void term_exit(void)
1447 {
1448     av_log(NULL, AV_LOG_QUIET, "%s", "");
1449 #if HAVE_TERMIOS_H
1450     if(restore_tty)
1451         tcsetattr (0, TCSANOW, &oldtty);
1452 #endif
1453 }
1454
1455 static volatile int received_sigterm = 0;
1456
1457 static void sigterm_handler(int sig)
1458 {
1459     received_sigterm = sig;
1460     received_nb_signals++;
1461     term_exit();
1462     if(received_nb_signals > 3)
1463         exit(123);
1464 }
1465
1466 static void term_init(void)
1467 {
1468 #if HAVE_TERMIOS_H
1469     if(!run_as_daemon){
1470         struct termios tty;
1471
1472         if (tcgetattr (0, &tty) == 0) {
1473             oldtty = tty;
1474             restore_tty = 1;
1475             atexit(term_exit);
1476
1477             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1478                              |INLCR|IGNCR|ICRNL|IXON);
1479             tty.c_oflag |= OPOST;
1480             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1481             tty.c_cflag &= ~(CSIZE|PARENB);
1482             tty.c_cflag |= CS8;
1483             tty.c_cc[VMIN] = 1;
1484             tty.c_cc[VTIME] = 0;
1485
1486             tcsetattr (0, TCSANOW, &tty);
1487         }
1488         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
1489     }
1490 #endif
1491     avformat_network_deinit();
1492
1493     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1494     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1495 #ifdef SIGXCPU
1496     signal(SIGXCPU, sigterm_handler);
1497 #endif
1498 }
1499
1500 /* read a key without blocking */
1501 static int read_key(void)
1502 {
1503     unsigned char ch;
1504 #if HAVE_TERMIOS_H
1505     int n = 1;
1506     struct timeval tv;
1507     fd_set rfds;
1508
1509     FD_ZERO(&rfds);
1510     FD_SET(0, &rfds);
1511     tv.tv_sec = 0;
1512     tv.tv_usec = 0;
1513     n = select(1, &rfds, NULL, NULL, &tv);
1514     if (n > 0) {
1515         n = read(0, &ch, 1);
1516         if (n == 1)
1517             return ch;
1518
1519         return n;
1520     }
1521 #elif HAVE_KBHIT
1522 #    if HAVE_PEEKNAMEDPIPE
1523     static int is_pipe;
1524     static HANDLE input_handle;
1525     DWORD dw, nchars;
1526     if(!input_handle){
1527         input_handle = GetStdHandle(STD_INPUT_HANDLE);
1528         is_pipe = !GetConsoleMode(input_handle, &dw);
1529     }
1530
1531     if (stdin->_cnt > 0) {
1532         read(0, &ch, 1);
1533         return ch;
1534     }
1535     if (is_pipe) {
1536         /* When running under a GUI, you will end here. */
1537         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL))
1538             return -1;
1539         //Read it
1540         if(nchars != 0) {
1541             read(0, &ch, 1);
1542             return ch;
1543         }else{
1544             return -1;
1545         }
1546     }
1547 #    endif
1548     if(kbhit())
1549         return(getch());
1550 #endif
1551     return -1;
1552 }
1553
1554 static int decode_interrupt_cb(void *ctx)
1555 {
1556     return received_nb_signals > 1;
1557 }
1558
1559 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1560
1561 void av_noreturn exit_program(int ret)
1562 {
1563     int i, j;
1564
1565     for (i = 0; i < nb_filtergraphs; i++) {
1566         avfilter_graph_free(&filtergraphs[i]->graph);
1567         for (j = 0; j < filtergraphs[i]->nb_inputs; j++)
1568             av_freep(&filtergraphs[i]->inputs[j]);
1569         av_freep(&filtergraphs[i]->inputs);
1570         for (j = 0; j < filtergraphs[i]->nb_outputs; j++)
1571             av_freep(&filtergraphs[i]->outputs[j]);
1572         av_freep(&filtergraphs[i]->outputs);
1573         av_freep(&filtergraphs[i]);
1574     }
1575     av_freep(&filtergraphs);
1576
1577     /* close files */
1578     for (i = 0; i < nb_output_files; i++) {
1579         AVFormatContext *s = output_files[i]->ctx;
1580         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1581             avio_close(s->pb);
1582         avformat_free_context(s);
1583         av_dict_free(&output_files[i]->opts);
1584         av_freep(&output_files[i]);
1585     }
1586     for (i = 0; i < nb_output_streams; i++) {
1587         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1588         while (bsfc) {
1589             AVBitStreamFilterContext *next = bsfc->next;
1590             av_bitstream_filter_close(bsfc);
1591             bsfc = next;
1592         }
1593         output_streams[i]->bitstream_filters = NULL;
1594
1595         av_freep(&output_streams[i]->filtered_frame);
1596         av_freep(&output_streams[i]);
1597     }
1598     for (i = 0; i < nb_input_files; i++) {
1599         avformat_close_input(&input_files[i]->ctx);
1600         av_freep(&input_files[i]);
1601     }
1602     for (i = 0; i < nb_input_streams; i++) {
1603         av_freep(&input_streams[i]->decoded_frame);
1604         av_dict_free(&input_streams[i]->opts);
1605         free_buffer_pool(input_streams[i]);
1606         av_freep(&input_streams[i]->filters);
1607         av_freep(&input_streams[i]);
1608     }
1609
1610     if (vstats_file)
1611         fclose(vstats_file);
1612     av_free(vstats_filename);
1613
1614     av_freep(&input_streams);
1615     av_freep(&input_files);
1616     av_freep(&output_streams);
1617     av_freep(&output_files);
1618
1619     uninit_opts();
1620
1621     avfilter_uninit();
1622     avformat_network_deinit();
1623
1624     if (received_sigterm) {
1625         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1626                (int) received_sigterm);
1627         exit (255);
1628     }
1629
1630     exit(ret);
1631 }
1632
1633 static void assert_avoptions(AVDictionary *m)
1634 {
1635     AVDictionaryEntry *t;
1636     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1637         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1638         exit_program(1);
1639     }
1640 }
1641
1642 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1643 {
1644     const char *codec_string = encoder ? "encoder" : "decoder";
1645     AVCodec *codec;
1646     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1647         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1648         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1649                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1650                 codec_string, c->codec->name);
1651         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1652         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1653             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1654                    codec_string, codec->name);
1655         exit_program(1);
1656     }
1657 }
1658
1659 static void choose_sample_fmt(AVStream *st, AVCodec *codec)
1660 {
1661     if (codec && codec->sample_fmts) {
1662         const enum AVSampleFormat *p = codec->sample_fmts;
1663         for (; *p != -1; p++) {
1664             if (*p == st->codec->sample_fmt)
1665                 break;
1666         }
1667         if (*p == -1) {
1668             if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
1669                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
1670             if(av_get_sample_fmt_name(st->codec->sample_fmt))
1671             av_log(NULL, AV_LOG_WARNING,
1672                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
1673                    av_get_sample_fmt_name(st->codec->sample_fmt),
1674                    codec->name,
1675                    av_get_sample_fmt_name(codec->sample_fmts[0]));
1676             st->codec->sample_fmt = codec->sample_fmts[0];
1677         }
1678     }
1679 }
1680
1681 static double
1682 get_sync_ipts(const OutputStream *ost, int64_t pts)
1683 {
1684     OutputFile *of = output_files[ost->file_index];
1685     return (double)(pts - of->start_time) / AV_TIME_BASE;
1686 }
1687
1688 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1689 {
1690     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1691     AVCodecContext          *avctx = ost->st->codec;
1692     int ret;
1693
1694     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
1695         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
1696         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1697
1698     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1699         int64_t max = ost->st->cur_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
1700         if (ost->st->cur_dts && ost->st->cur_dts != AV_NOPTS_VALUE &&  max > pkt->dts) {
1701             av_log(s, max - pkt->dts > 2 ? AV_LOG_WARNING : AV_LOG_DEBUG, "Audio timestamp %"PRId64" < %"PRId64" invalid, cliping\n", pkt->dts, max);
1702             pkt->pts = pkt->dts = max;
1703         }
1704     }
1705
1706     /*
1707      * Audio encoders may split the packets --  #frames in != #packets out.
1708      * But there is no reordering, so we can limit the number of output packets
1709      * by simply dropping them here.
1710      * Counting encoded video frames needs to be done separately because of
1711      * reordering, see do_video_out()
1712      */
1713     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1714         if (ost->frame_number >= ost->max_frames) {
1715             av_free_packet(pkt);
1716             return;
1717         }
1718         ost->frame_number++;
1719     }
1720
1721     while (bsfc) {
1722         AVPacket new_pkt = *pkt;
1723         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1724                                            &new_pkt.data, &new_pkt.size,
1725                                            pkt->data, pkt->size,
1726                                            pkt->flags & AV_PKT_FLAG_KEY);
1727         if (a > 0) {
1728             av_free_packet(pkt);
1729             new_pkt.destruct = av_destruct_packet;
1730         } else if (a < 0) {
1731             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
1732                    bsfc->filter->name, pkt->stream_index,
1733                    avctx->codec ? avctx->codec->name : "copy");
1734             print_error("", a);
1735             if (exit_on_error)
1736                 exit_program(1);
1737         }
1738         *pkt = new_pkt;
1739
1740         bsfc = bsfc->next;
1741     }
1742
1743     pkt->stream_index = ost->index;
1744     ret = av_interleaved_write_frame(s, pkt);
1745     if (ret < 0) {
1746         print_error("av_interleaved_write_frame()", ret);
1747         exit_program(1);
1748     }
1749 }
1750
1751 static int check_recording_time(OutputStream *ost)
1752 {
1753     OutputFile *of = output_files[ost->file_index];
1754
1755     if (of->recording_time != INT64_MAX &&
1756         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
1757                       AV_TIME_BASE_Q) >= 0) {
1758         ost->is_past_recording_time = 1;
1759         return 0;
1760     }
1761     return 1;
1762 }
1763
1764 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1765                          AVFrame *frame)
1766 {
1767     AVCodecContext *enc = ost->st->codec;
1768     AVPacket pkt;
1769     int got_packet = 0;
1770
1771     av_init_packet(&pkt);
1772     pkt.data = NULL;
1773     pkt.size = 0;
1774 #if 0
1775     if (!check_recording_time(ost))
1776         return;
1777 #endif
1778     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
1779         frame->pts = ost->sync_opts;
1780     ost->sync_opts = frame->pts + frame->nb_samples;
1781
1782     av_assert0(pkt.size || !pkt.data);
1783     update_benchmark(NULL);
1784     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1785         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
1786         exit_program(1);
1787     }
1788     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
1789
1790     if (got_packet) {
1791         if (pkt.pts != AV_NOPTS_VALUE)
1792             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1793         if (pkt.dts != AV_NOPTS_VALUE)
1794             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1795         if (pkt.duration > 0)
1796             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1797
1798         if (debug_ts) {
1799             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
1800                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1801                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1802                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1803         }
1804
1805         write_frame(s, &pkt, ost);
1806
1807         audio_size += pkt.size;
1808         av_free_packet(&pkt);
1809     }
1810 }
1811
1812 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1813 {
1814     AVCodecContext *dec;
1815     AVPicture *picture2;
1816     AVPicture picture_tmp;
1817     uint8_t *buf = 0;
1818
1819     dec = ist->st->codec;
1820
1821     /* deinterlace : must be done before any resize */
1822     if (do_deinterlace) {
1823         int size;
1824
1825         /* create temporary picture */
1826         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1827         buf  = av_malloc(size);
1828         if (!buf)
1829             return;
1830
1831         picture2 = &picture_tmp;
1832         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1833
1834         if (avpicture_deinterlace(picture2, picture,
1835                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1836             /* if error, do not deinterlace */
1837             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1838             av_free(buf);
1839             buf = NULL;
1840             picture2 = picture;
1841         }
1842     } else {
1843         picture2 = picture;
1844     }
1845
1846     if (picture != picture2)
1847         *picture = *picture2;
1848     *bufp = buf;
1849 }
1850
1851 static void do_subtitle_out(AVFormatContext *s,
1852                             OutputStream *ost,
1853                             InputStream *ist,
1854                             AVSubtitle *sub,
1855                             int64_t pts)
1856 {
1857     static uint8_t *subtitle_out = NULL;
1858     int subtitle_out_max_size = 1024 * 1024;
1859     int subtitle_out_size, nb, i;
1860     AVCodecContext *enc;
1861     AVPacket pkt;
1862
1863     if (pts == AV_NOPTS_VALUE) {
1864         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1865         if (exit_on_error)
1866             exit_program(1);
1867         return;
1868     }
1869
1870     enc = ost->st->codec;
1871
1872     if (!subtitle_out) {
1873         subtitle_out = av_malloc(subtitle_out_max_size);
1874     }
1875
1876     /* Note: DVB subtitle need one packet to draw them and one other
1877        packet to clear them */
1878     /* XXX: signal it in the codec context ? */
1879     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1880         nb = 2;
1881     else
1882         nb = 1;
1883
1884     for (i = 0; i < nb; i++) {
1885         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1886
1887         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1888         // start_display_time is required to be 0
1889         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1890         sub->end_display_time  -= sub->start_display_time;
1891         sub->start_display_time = 0;
1892         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1893                                                     subtitle_out_max_size, sub);
1894         if (subtitle_out_size < 0) {
1895             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1896             exit_program(1);
1897         }
1898
1899         av_init_packet(&pkt);
1900         pkt.data = subtitle_out;
1901         pkt.size = subtitle_out_size;
1902         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1903         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1904             /* XXX: the pts correction is handled here. Maybe handling
1905                it in the codec would be better */
1906             if (i == 0)
1907                 pkt.pts += 90 * sub->start_display_time;
1908             else
1909                 pkt.pts += 90 * sub->end_display_time;
1910         }
1911         write_frame(s, &pkt, ost);
1912     }
1913 }
1914
1915 static double psnr(double d)
1916 {
1917     return -10.0 * log(d) / log(10.0);
1918 }
1919
1920 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1921                            int frame_size)
1922 {
1923     AVCodecContext *enc;
1924     int frame_number;
1925     double ti1, bitrate, avg_bitrate;
1926
1927     /* this is executed just the first time do_video_stats is called */
1928     if (!vstats_file) {
1929         vstats_file = fopen(vstats_filename, "w");
1930         if (!vstats_file) {
1931             perror("fopen");
1932             exit_program(1);
1933         }
1934     }
1935
1936     enc = ost->st->codec;
1937     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1938         frame_number = ost->frame_number;
1939         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1940         if (enc->flags&CODEC_FLAG_PSNR)
1941             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1942
1943         fprintf(vstats_file,"f_size= %6d ", frame_size);
1944         /* compute pts value */
1945         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1946         if (ti1 < 0.01)
1947             ti1 = 0.01;
1948
1949         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1950         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1951         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1952                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1953         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1954     }
1955 }
1956
1957
1958 static void do_video_out(AVFormatContext *s, OutputStream *ost,
1959                          AVFrame *in_picture, float quality)
1960 {
1961     int nb_frames, i, ret, format_video_sync;
1962     AVCodecContext *enc;
1963     double sync_ipts, delta;
1964     double duration = 0;
1965     int frame_size = 0;
1966     InputStream *ist = NULL;
1967
1968     if (ost->source_index >= 0)
1969         ist = input_streams[ost->source_index];
1970
1971     enc = ost->st->codec;
1972
1973     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
1974         duration = 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base));
1975
1976     sync_ipts = get_sync_ipts(ost, in_picture->pts) / av_q2d(enc->time_base);
1977     delta = sync_ipts - ost->sync_opts + duration;
1978
1979     /* by default, we output a single frame */
1980     nb_frames = 1;
1981
1982     format_video_sync = video_sync_method;
1983     if (format_video_sync == VSYNC_AUTO)
1984         format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : 1;
1985
1986     switch (format_video_sync) {
1987     case VSYNC_CFR:
1988         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
1989         if (delta < -1.1)
1990             nb_frames = 0;
1991         else if (delta > 1.1)
1992             nb_frames = lrintf(delta);
1993         break;
1994     case VSYNC_VFR:
1995         if (delta <= -0.6)
1996             nb_frames = 0;
1997         else if (delta > 0.6)
1998             ost->sync_opts = lrint(sync_ipts);
1999         break;
2000     case VSYNC_DROP:
2001     case VSYNC_PASSTHROUGH:
2002         ost->sync_opts = lrint(sync_ipts);
2003         break;
2004     default:
2005         av_assert0(0);
2006     }
2007
2008     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
2009     if (nb_frames == 0) {
2010         nb_frames_drop++;
2011         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
2012         return;
2013     } else if (nb_frames > 1) {
2014         nb_frames_dup += nb_frames - 1;
2015         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
2016     }
2017
2018     /* duplicates frame if needed */
2019     for (i = 0; i < nb_frames; i++) {
2020         AVPacket pkt;
2021         av_init_packet(&pkt);
2022         pkt.data = NULL;
2023         pkt.size = 0;
2024
2025         if (s->oformat->flags & AVFMT_RAWPICTURE &&
2026             enc->codec->id == CODEC_ID_RAWVIDEO) {
2027             /* raw pictures are written as AVPicture structure to
2028                avoid any copies. We support temporarily the older
2029                method. */
2030             enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
2031             enc->coded_frame->top_field_first  = in_picture->top_field_first;
2032             pkt.data   = (uint8_t *)in_picture;
2033             pkt.size   =  sizeof(AVPicture);
2034             pkt.pts    = av_rescale_q(ost->sync_opts, enc->time_base, ost->st->time_base);
2035             pkt.flags |= AV_PKT_FLAG_KEY;
2036
2037             write_frame(s, &pkt, ost);
2038         } else {
2039             int got_packet;
2040             AVFrame big_picture;
2041
2042             big_picture = *in_picture;
2043             /* better than nothing: use input picture interlaced
2044                settings */
2045             big_picture.interlaced_frame = in_picture->interlaced_frame;
2046             if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
2047                 if (ost->top_field_first == -1)
2048                     big_picture.top_field_first = in_picture->top_field_first;
2049                 else
2050                     big_picture.top_field_first = !!ost->top_field_first;
2051             }
2052
2053             /* handles same_quant here. This is not correct because it may
2054                not be a global option */
2055             big_picture.quality = quality;
2056             if (!enc->me_threshold)
2057                 big_picture.pict_type = 0;
2058             big_picture.pts = ost->sync_opts;
2059             if (ost->forced_kf_index < ost->forced_kf_count &&
2060                 big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
2061                 big_picture.pict_type = AV_PICTURE_TYPE_I;
2062                 ost->forced_kf_index++;
2063             }
2064             update_benchmark(NULL);
2065             ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
2066             update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
2067             if (ret < 0) {
2068                 av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
2069                 exit_program(1);
2070             }
2071
2072             if (got_packet) {
2073                 if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
2074                     pkt.pts = ost->sync_opts;
2075
2076                 if (pkt.pts != AV_NOPTS_VALUE)
2077                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
2078                 if (pkt.dts != AV_NOPTS_VALUE)
2079                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
2080
2081                 if (debug_ts) {
2082                     av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
2083                            "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
2084                            av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
2085                            av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
2086                 }
2087
2088                 write_frame(s, &pkt, ost);
2089                 frame_size = pkt.size;
2090                 video_size += pkt.size;
2091                 av_free_packet(&pkt);
2092
2093                 /* if two pass, output log */
2094                 if (ost->logfile && enc->stats_out) {
2095                     fprintf(ost->logfile, "%s", enc->stats_out);
2096                 }
2097             }
2098         }
2099         ost->sync_opts++;
2100         /*
2101          * For video, number of frames in == number of packets out.
2102          * But there may be reordering, so we can't throw away frames on encoder
2103          * flush, we need to limit them here, before they go into encoder.
2104          */
2105         ost->frame_number++;
2106     }
2107     if (vstats_filename && frame_size)
2108         do_video_stats(output_files[ost->file_index]->ctx, ost, frame_size);
2109 }
2110
2111 /* check for new output on any of the filtergraphs */
2112 static int poll_filters(void)
2113 {
2114     AVFilterBufferRef *picref;
2115     AVFrame *filtered_frame = NULL;
2116     int i, ret, ret_all;
2117     unsigned nb_success, nb_eof;
2118     int64_t frame_pts;
2119
2120     while (1) {
2121         /* Reap all buffers present in the buffer sinks */
2122         for (i = 0; i < nb_output_streams; i++) {
2123             OutputStream *ost = output_streams[i];
2124             OutputFile    *of = output_files[ost->file_index];
2125             int ret = 0;
2126
2127             if (!ost->filter || ost->is_past_recording_time)
2128                 continue;
2129
2130             if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
2131                 return AVERROR(ENOMEM);
2132             } else
2133                 avcodec_get_frame_defaults(ost->filtered_frame);
2134             filtered_frame = ost->filtered_frame;
2135
2136             while (1) {
2137                 AVRational ist_pts_tb = ost->filter->filter->inputs[0]->time_base;
2138                 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2139                     !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
2140                     ret = av_buffersink_read_samples(ost->filter->filter, &picref,
2141                                                     ost->st->codec->frame_size);
2142                 else
2143 #ifdef SINKA
2144                     ret = av_buffersink_read(ost->filter->filter, &picref);
2145 #else
2146                     ret = av_buffersink_get_buffer_ref(ost->filter->filter, &picref,
2147                                                        AV_BUFFERSINK_FLAG_NO_REQUEST);
2148 #endif
2149                 if (ret < 0) {
2150                     if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
2151                         char buf[256];
2152                         av_strerror(ret, buf, sizeof(buf));
2153                         av_log(NULL, AV_LOG_WARNING,
2154                                "Error in av_buffersink_get_buffer_ref(): %s\n", buf);
2155                     }
2156                     break;
2157                 }
2158                 frame_pts = AV_NOPTS_VALUE;
2159                 if (ost->enc->type == AVMEDIA_TYPE_VIDEO)
2160                     filtered_frame->pts = frame_pts = av_rescale_q(picref->pts, ist_pts_tb, AV_TIME_BASE_Q);
2161                 else if (picref->pts != AV_NOPTS_VALUE)
2162                     filtered_frame->pts = frame_pts = av_rescale_q(picref->pts,
2163                                                     ost->filter->filter->inputs[0]->time_base,
2164                                                     ost->st->codec->time_base) -
2165                                         av_rescale_q(of->start_time,
2166                                                     AV_TIME_BASE_Q,
2167                                                     ost->st->codec->time_base);
2168                 //if (ost->source_index >= 0)
2169                 //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
2170
2171                 if (of->start_time && filtered_frame->pts < of->start_time) {
2172                     avfilter_unref_buffer(picref);
2173                     continue;
2174                 }
2175
2176                 switch (ost->filter->filter->inputs[0]->type) {
2177                 case AVMEDIA_TYPE_VIDEO:
2178                     avfilter_fill_frame_from_video_buffer_ref(filtered_frame, picref);
2179                     filtered_frame->pts = frame_pts;
2180                     if (!ost->frame_aspect_ratio)
2181                         ost->st->codec->sample_aspect_ratio = picref->video->sample_aspect_ratio;
2182
2183                     do_video_out(of->ctx, ost, filtered_frame,
2184                                  same_quant ? ost->last_quality :
2185                                               ost->st->codec->global_quality);
2186                     break;
2187                 case AVMEDIA_TYPE_AUDIO:
2188                     avfilter_copy_buf_props(filtered_frame, picref);
2189                     filtered_frame->pts = frame_pts;
2190                     do_audio_out(of->ctx, ost, filtered_frame);
2191                     break;
2192                 default:
2193                     // TODO support subtitle filters
2194                     av_assert0(0);
2195                 }
2196
2197                 avfilter_unref_buffer(picref);
2198             }
2199         }
2200         /* Request frames through all the graphs */
2201         ret_all = nb_success = nb_eof = 0;
2202         for (i = 0; i < nb_filtergraphs; i++) {
2203             ret = avfilter_graph_request_oldest(filtergraphs[i]->graph);
2204             if (!ret) {
2205                 nb_success++;
2206             } else if (ret == AVERROR_EOF) {
2207                 nb_eof++;
2208             } else if (ret != AVERROR(EAGAIN)) {
2209                 char buf[256];
2210                 av_strerror(ret, buf, sizeof(buf));
2211                 av_log(NULL, AV_LOG_WARNING,
2212                        "Error in request_frame(): %s\n", buf);
2213                 ret_all = ret;
2214             }
2215         }
2216         if (!nb_success)
2217             break;
2218         /* Try again if anything succeeded */
2219     }
2220     return nb_eof == nb_filtergraphs ? AVERROR_EOF : ret_all;
2221 }
2222
2223 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
2224 {
2225     char buf[1024];
2226     OutputStream *ost;
2227     AVFormatContext *oc;
2228     int64_t total_size;
2229     AVCodecContext *enc;
2230     int frame_number, vid, i;
2231     double bitrate;
2232     int64_t pts = INT64_MAX;
2233     static int64_t last_time = -1;
2234     static int qp_histogram[52];
2235     int hours, mins, secs, us;
2236
2237     if (!print_stats && !is_last_report)
2238         return;
2239
2240     if (!is_last_report) {
2241         if (last_time == -1) {
2242             last_time = cur_time;
2243             return;
2244         }
2245         if ((cur_time - last_time) < 500000)
2246             return;
2247         last_time = cur_time;
2248     }
2249
2250
2251     oc = output_files[0]->ctx;
2252
2253     total_size = avio_size(oc->pb);
2254     if (total_size < 0) { // FIXME improve avio_size() so it works with non seekable output too
2255         total_size = avio_tell(oc->pb);
2256         if (total_size < 0)
2257             total_size = 0;
2258     }
2259
2260     buf[0] = '\0';
2261     vid = 0;
2262     for (i = 0; i < nb_output_streams; i++) {
2263         float q = -1;
2264         ost = output_streams[i];
2265         enc = ost->st->codec;
2266         if (!ost->stream_copy && enc->coded_frame)
2267             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
2268         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2269             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
2270         }
2271         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2272             float fps, t = (cur_time-timer_start) / 1000000.0;
2273
2274             frame_number = ost->frame_number;
2275             fps = t > 1 ? frame_number / t : 0;
2276             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
2277                      frame_number, fps < 9.95, fps, q);
2278             if (is_last_report)
2279                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
2280             if (qp_hist) {
2281                 int j;
2282                 int qp = lrintf(q);
2283                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
2284                     qp_histogram[qp]++;
2285                 for (j = 0; j < 32; j++)
2286                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
2287             }
2288             if (enc->flags&CODEC_FLAG_PSNR) {
2289                 int j;
2290                 double error, error_sum = 0;
2291                 double scale, scale_sum = 0;
2292                 char type[3] = { 'Y','U','V' };
2293                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
2294                 for (j = 0; j < 3; j++) {
2295                     if (is_last_report) {
2296                         error = enc->error[j];
2297                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
2298                     } else {
2299                         error = enc->coded_frame->error[j];
2300                         scale = enc->width * enc->height * 255.0 * 255.0;
2301                     }
2302                     if (j)
2303                         scale /= 4;
2304                     error_sum += error;
2305                     scale_sum += scale;
2306                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
2307                 }
2308                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
2309             }
2310             vid = 1;
2311         }
2312         /* compute min output value */
2313         pts = FFMIN(pts, av_rescale_q(ost->st->pts.val,
2314                                       ost->st->time_base, AV_TIME_BASE_Q));
2315     }
2316
2317     secs = pts / AV_TIME_BASE;
2318     us = pts % AV_TIME_BASE;
2319     mins = secs / 60;
2320     secs %= 60;
2321     hours = mins / 60;
2322     mins %= 60;
2323
2324     bitrate = pts ? total_size * 8 / (pts / 1000.0) : 0;
2325
2326     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2327              "size=%8.0fkB time=", total_size / 1024.0);
2328     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2329              "%02d:%02d:%02d.%02d ", hours, mins, secs,
2330              (100 * us) / AV_TIME_BASE);
2331     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2332              "bitrate=%6.1fkbits/s", bitrate);
2333
2334     if (nb_frames_dup || nb_frames_drop)
2335         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
2336                 nb_frames_dup, nb_frames_drop);
2337
2338     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
2339
2340     fflush(stderr);
2341
2342     if (is_last_report) {
2343         int64_t raw= audio_size + video_size + extra_size;
2344         av_log(NULL, AV_LOG_INFO, "\n");
2345         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
2346                video_size / 1024.0,
2347                audio_size / 1024.0,
2348                extra_size / 1024.0,
2349                100.0 * (total_size - raw) / raw
2350         );
2351         if(video_size + audio_size + extra_size == 0){
2352             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
2353         }
2354     }
2355 }
2356
2357 static void flush_encoders(void)
2358 {
2359     int i, ret;
2360
2361     for (i = 0; i < nb_output_streams; i++) {
2362         OutputStream   *ost = output_streams[i];
2363         AVCodecContext *enc = ost->st->codec;
2364         AVFormatContext *os = output_files[ost->file_index]->ctx;
2365         int stop_encoding = 0;
2366
2367         if (!ost->encoding_needed)
2368             continue;
2369
2370         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
2371             continue;
2372         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
2373             continue;
2374
2375         for (;;) {
2376             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
2377             const char *desc;
2378             int64_t *size;
2379
2380             switch (ost->st->codec->codec_type) {
2381             case AVMEDIA_TYPE_AUDIO:
2382                 encode = avcodec_encode_audio2;
2383                 desc   = "Audio";
2384                 size   = &audio_size;
2385                 break;
2386             case AVMEDIA_TYPE_VIDEO:
2387                 encode = avcodec_encode_video2;
2388                 desc   = "Video";
2389                 size   = &video_size;
2390                 break;
2391             default:
2392                 stop_encoding = 1;
2393             }
2394
2395             if (encode) {
2396                 AVPacket pkt;
2397                 int got_packet;
2398                 av_init_packet(&pkt);
2399                 pkt.data = NULL;
2400                 pkt.size = 0;
2401
2402                 update_benchmark(NULL);
2403                 ret = encode(enc, &pkt, NULL, &got_packet);
2404                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
2405                 if (ret < 0) {
2406                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
2407                     exit_program(1);
2408                 }
2409                 *size += pkt.size;
2410                 if (ost->logfile && enc->stats_out) {
2411                     fprintf(ost->logfile, "%s", enc->stats_out);
2412                 }
2413                 if (!got_packet) {
2414                     stop_encoding = 1;
2415                     break;
2416                 }
2417                 if (pkt.pts != AV_NOPTS_VALUE)
2418                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
2419                 if (pkt.dts != AV_NOPTS_VALUE)
2420                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
2421                 write_frame(os, &pkt, ost);
2422             }
2423
2424             if (stop_encoding)
2425                 break;
2426         }
2427     }
2428 }
2429
2430 /*
2431  * Check whether a packet from ist should be written into ost at this time
2432  */
2433 static int check_output_constraints(InputStream *ist, OutputStream *ost)
2434 {
2435     OutputFile *of = output_files[ost->file_index];
2436     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
2437
2438     if (ost->source_index != ist_index)
2439         return 0;
2440
2441     if (of->start_time && ist->pts < of->start_time)
2442         return 0;
2443
2444     if (of->recording_time != INT64_MAX &&
2445         av_compare_ts(ist->pts, AV_TIME_BASE_Q, of->recording_time + of->start_time,
2446                       (AVRational){ 1, 1000000 }) >= 0) {
2447         ost->is_past_recording_time = 1;
2448         return 0;
2449     }
2450
2451     return 1;
2452 }
2453
2454 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
2455 {
2456     OutputFile *of = output_files[ost->file_index];
2457     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
2458     AVPicture pict;
2459     AVPacket opkt;
2460
2461     av_init_packet(&opkt);
2462
2463     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
2464         !ost->copy_initial_nonkeyframes)
2465         return;
2466
2467     /* force the input stream PTS */
2468     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2469         audio_size += pkt->size;
2470     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2471         video_size += pkt->size;
2472         ost->sync_opts++;
2473     }
2474
2475     if (pkt->pts != AV_NOPTS_VALUE)
2476         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
2477     else
2478         opkt.pts = AV_NOPTS_VALUE;
2479
2480     if (pkt->dts == AV_NOPTS_VALUE)
2481         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
2482     else
2483         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
2484     opkt.dts -= ost_tb_start_time;
2485
2486     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
2487     opkt.flags    = pkt->flags;
2488
2489     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
2490     if (  ost->st->codec->codec_id != CODEC_ID_H264
2491        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
2492        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
2493        && ost->st->codec->codec_id != CODEC_ID_VC1
2494        ) {
2495         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
2496             opkt.destruct = av_destruct_packet;
2497     } else {
2498         opkt.data = pkt->data;
2499         opkt.size = pkt->size;
2500     }
2501     if (of->ctx->oformat->flags & AVFMT_RAWPICTURE) {
2502         /* store AVPicture in AVPacket, as expected by the output format */
2503         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
2504         opkt.data = (uint8_t *)&pict;
2505         opkt.size = sizeof(AVPicture);
2506         opkt.flags |= AV_PKT_FLAG_KEY;
2507     }
2508
2509     write_frame(of->ctx, &opkt, ost);
2510     ost->st->codec->frame_number++;
2511     av_free_packet(&opkt);
2512 }
2513
2514 static void rate_emu_sleep(InputStream *ist)
2515 {
2516     if (input_files[ist->file_index]->rate_emu) {
2517         int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
2518         int64_t now = av_gettime() - ist->start;
2519         if (pts > now)
2520             usleep(pts - now);
2521     }
2522 }
2523
2524 static int guess_input_channel_layout(InputStream *ist)
2525 {
2526     AVCodecContext *dec = ist->st->codec;
2527
2528     if (!dec->channel_layout) {
2529         char layout_name[256];
2530
2531         dec->channel_layout = av_get_default_channel_layout(dec->channels);
2532         if (!dec->channel_layout)
2533             return 0;
2534         av_get_channel_layout_string(layout_name, sizeof(layout_name),
2535                                      dec->channels, dec->channel_layout);
2536         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
2537                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
2538     }
2539     return 1;
2540 }
2541
2542 static int transcode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
2543 {
2544     AVFrame *decoded_frame;
2545     AVCodecContext *avctx = ist->st->codec;
2546     int i, ret, resample_changed;
2547
2548     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2549         return AVERROR(ENOMEM);
2550     else
2551         avcodec_get_frame_defaults(ist->decoded_frame);
2552     decoded_frame = ist->decoded_frame;
2553
2554     update_benchmark(NULL);
2555     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
2556     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
2557     if (ret < 0) {
2558         return ret;
2559     }
2560     if (avctx->sample_rate <= 0) {
2561         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
2562         return AVERROR_INVALIDDATA;
2563     }
2564
2565     if (!*got_output) {
2566         /* no audio frame */
2567         if (!pkt->size)
2568             for (i = 0; i < ist->nb_filters; i++)
2569                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL,
2570                                      AV_BUFFERSRC_FLAG_NO_COPY);
2571         return ret;
2572     }
2573
2574     /* if the decoder provides a pts, use it instead of the last packet pts.
2575        the decoder could be delaying output by a packet or more. */
2576     if (decoded_frame->pts != AV_NOPTS_VALUE)
2577         ist->dts = ist->next_dts = ist->pts = ist->next_pts = decoded_frame->pts;
2578     else if (pkt->pts != AV_NOPTS_VALUE) {
2579         decoded_frame->pts = pkt->pts;
2580         pkt->pts           = AV_NOPTS_VALUE;
2581     }else
2582         decoded_frame->pts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
2583
2584
2585 #if 1
2586     /* increment next_dts to use for the case where the input stream does not
2587        have timestamps or there are multiple frames in the packet */
2588     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2589                      avctx->sample_rate;
2590     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2591                      avctx->sample_rate;
2592 #endif
2593
2594     rate_emu_sleep(ist);
2595
2596     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
2597                        ist->resample_channels       != avctx->channels               ||
2598                        ist->resample_channel_layout != decoded_frame->channel_layout ||
2599                        ist->resample_sample_rate    != decoded_frame->sample_rate;
2600     if (resample_changed) {
2601         char layout1[64], layout2[64];
2602
2603         if (!guess_input_channel_layout(ist)) {
2604             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
2605                    "layout for Input Stream #%d.%d\n", ist->file_index,
2606                    ist->st->index);
2607             exit_program(1);
2608         }
2609         decoded_frame->channel_layout = avctx->channel_layout;
2610
2611         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
2612                                      ist->resample_channel_layout);
2613         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
2614                                      decoded_frame->channel_layout);
2615
2616         av_log(NULL, AV_LOG_INFO,
2617                "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",
2618                ist->file_index, ist->st->index,
2619                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2620                ist->resample_channels, layout1,
2621                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2622                avctx->channels, layout2);
2623
2624         ist->resample_sample_fmt     = decoded_frame->format;
2625         ist->resample_sample_rate    = decoded_frame->sample_rate;
2626         ist->resample_channel_layout = decoded_frame->channel_layout;
2627         ist->resample_channels       = avctx->channels;
2628
2629         for (i = 0; i < nb_filtergraphs; i++)
2630             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2631                 configure_filtergraph(filtergraphs[i]) < 0) {
2632                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2633                 exit_program(1);
2634             }
2635     }
2636
2637     for (i = 0; i < ist->nb_filters; i++)
2638         av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, 0);
2639
2640     return ret;
2641 }
2642
2643 static int transcode_video(InputStream *ist, AVPacket *pkt, int *got_output, int64_t *pkt_pts)
2644 {
2645     AVFrame *decoded_frame;
2646     void *buffer_to_free = NULL;
2647     int i, ret = 0, resample_changed;
2648     int64_t best_effort_timestamp;
2649     AVRational *frame_sample_aspect;
2650     float quality;
2651
2652     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2653         return AVERROR(ENOMEM);
2654     else
2655         avcodec_get_frame_defaults(ist->decoded_frame);
2656     decoded_frame = ist->decoded_frame;
2657     pkt->pts  = *pkt_pts;
2658     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
2659     *pkt_pts  = AV_NOPTS_VALUE;
2660
2661     update_benchmark(NULL);
2662     ret = avcodec_decode_video2(ist->st->codec,
2663                                 decoded_frame, got_output, pkt);
2664     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
2665     if (ret < 0)
2666         return ret;
2667
2668     quality = same_quant ? decoded_frame->quality : 0;
2669     if (!*got_output) {
2670         /* no picture yet */
2671         if (!pkt->size)
2672             for (i = 0; i < ist->nb_filters; i++)
2673                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, AV_BUFFERSRC_FLAG_NO_COPY);
2674         return ret;
2675     }
2676
2677     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
2678     if(best_effort_timestamp != AV_NOPTS_VALUE)
2679         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
2680
2681     pkt->size = 0;
2682     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2683
2684     rate_emu_sleep(ist);
2685
2686     if (ist->st->sample_aspect_ratio.num)
2687         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2688
2689     resample_changed = ist->resample_width   != decoded_frame->width  ||
2690                        ist->resample_height  != decoded_frame->height ||
2691                        ist->resample_pix_fmt != decoded_frame->format;
2692     if (resample_changed) {
2693         av_log(NULL, AV_LOG_INFO,
2694                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2695                ist->file_index, ist->st->index,
2696                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2697                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2698
2699         ist->resample_width   = decoded_frame->width;
2700         ist->resample_height  = decoded_frame->height;
2701         ist->resample_pix_fmt = decoded_frame->format;
2702
2703         for (i = 0; i < nb_filtergraphs; i++)
2704             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2705                 configure_filtergraph(filtergraphs[i]) < 0) {
2706                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2707                 exit_program(1);
2708             }
2709     }
2710
2711     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2712     for (i = 0; i < ist->nb_filters; i++) {
2713         int changed =      ist->st->codec->width   != ist->filters[i]->filter->outputs[0]->w
2714                         || ist->st->codec->height  != ist->filters[i]->filter->outputs[0]->h
2715                         || ist->st->codec->pix_fmt != ist->filters[i]->filter->outputs[0]->format;
2716         // XXX what an ugly hack
2717         if (ist->filters[i]->graph->nb_outputs == 1)
2718             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2719
2720         if (!frame_sample_aspect->num)
2721             *frame_sample_aspect = ist->st->sample_aspect_ratio;
2722         if (ist->dr1 && decoded_frame->type==FF_BUFFER_TYPE_USER && !changed) {
2723             FrameBuffer      *buf = decoded_frame->opaque;
2724             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2725                                         decoded_frame->data, decoded_frame->linesize,
2726                                         AV_PERM_READ | AV_PERM_PRESERVE,
2727                                         ist->st->codec->width, ist->st->codec->height,
2728                                         ist->st->codec->pix_fmt);
2729
2730             avfilter_copy_frame_props(fb, decoded_frame);
2731             fb->buf->priv           = buf;
2732             fb->buf->free           = filter_release_buffer;
2733
2734             av_assert0(buf->refcount>0);
2735             buf->refcount++;
2736             av_buffersrc_add_ref(ist->filters[i]->filter, fb,
2737                                  AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT |
2738                                  AV_BUFFERSRC_FLAG_NO_COPY);
2739         } else
2740         if(av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, 0)<0) {
2741             av_log(NULL, AV_LOG_FATAL, "Failed to inject frame into filter network\n");
2742             exit_program(1);
2743         }
2744
2745     }
2746
2747     av_free(buffer_to_free);
2748     return ret;
2749 }
2750
2751 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2752 {
2753     AVSubtitle subtitle;
2754     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2755                                           &subtitle, got_output, pkt);
2756     if (ret < 0)
2757         return ret;
2758     if (!*got_output)
2759         return ret;
2760
2761     rate_emu_sleep(ist);
2762
2763     for (i = 0; i < nb_output_streams; i++) {
2764         OutputStream *ost = output_streams[i];
2765
2766         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2767             continue;
2768
2769         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2770     }
2771
2772     avsubtitle_free(&subtitle);
2773     return ret;
2774 }
2775
2776 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2777 static int output_packet(InputStream *ist, const AVPacket *pkt)
2778 {
2779     int ret = 0, i;
2780     int got_output;
2781     int64_t pkt_pts = AV_NOPTS_VALUE;
2782
2783     AVPacket avpkt;
2784     if (!ist->saw_first_ts) {
2785         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;
2786         ist->pts = 0;
2787         if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
2788             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2789             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
2790         }
2791         ist->saw_first_ts = 1;
2792     }
2793
2794     if (ist->next_dts == AV_NOPTS_VALUE)
2795         ist->next_dts = ist->dts;
2796     if (ist->next_pts == AV_NOPTS_VALUE)
2797         ist->next_pts = ist->pts;
2798
2799     if (pkt == NULL) {
2800         /* EOF handling */
2801         av_init_packet(&avpkt);
2802         avpkt.data = NULL;
2803         avpkt.size = 0;
2804         goto handle_eof;
2805     } else {
2806         avpkt = *pkt;
2807     }
2808
2809     if (pkt->dts != AV_NOPTS_VALUE) {
2810         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2811         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2812             ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2813     }
2814     if(pkt->pts != AV_NOPTS_VALUE)
2815         pkt_pts = pkt->pts;
2816
2817     // while we have more to decode or while the decoder did output something on EOF
2818     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2819         int duration;
2820     handle_eof:
2821
2822         ist->pts = ist->next_pts;
2823         ist->dts = ist->next_dts;
2824
2825         if (avpkt.size && avpkt.size != pkt->size) {
2826             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2827                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2828             ist->showed_multi_packet_warning = 1;
2829         }
2830
2831         switch (ist->st->codec->codec_type) {
2832         case AVMEDIA_TYPE_AUDIO:
2833             ret = transcode_audio    (ist, &avpkt, &got_output);
2834             break;
2835         case AVMEDIA_TYPE_VIDEO:
2836             ret = transcode_video    (ist, &avpkt, &got_output, &pkt_pts);
2837             if (avpkt.duration) {
2838                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2839             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
2840                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
2841                 duration = ((int64_t)AV_TIME_BASE *
2842                                 ist->st->codec->time_base.num * ticks) /
2843                                 ist->st->codec->time_base.den;
2844             } else
2845                 duration = 0;
2846
2847             if(ist->dts != AV_NOPTS_VALUE && duration) {
2848                 ist->next_dts += duration;
2849             }else
2850                 ist->next_dts = AV_NOPTS_VALUE;
2851
2852             if (got_output)
2853                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
2854             break;
2855         case AVMEDIA_TYPE_SUBTITLE:
2856             ret = transcode_subtitles(ist, &avpkt, &got_output);
2857             break;
2858         default:
2859             return -1;
2860         }
2861
2862         if (ret < 0)
2863             return ret;
2864
2865         avpkt.dts=
2866         avpkt.pts= AV_NOPTS_VALUE;
2867
2868         // touch data and size only if not EOF
2869         if (pkt) {
2870             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
2871                 ret = avpkt.size;
2872             avpkt.data += ret;
2873             avpkt.size -= ret;
2874         }
2875         if (!got_output) {
2876             continue;
2877         }
2878     }
2879
2880     /* handle stream copy */
2881     if (!ist->decoding_needed) {
2882         rate_emu_sleep(ist);
2883         ist->dts = ist->next_dts;
2884         switch (ist->st->codec->codec_type) {
2885         case AVMEDIA_TYPE_AUDIO:
2886             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2887                              ist->st->codec->sample_rate;
2888             break;
2889         case AVMEDIA_TYPE_VIDEO:
2890             if (pkt->duration) {
2891                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2892             } else if(ist->st->codec->time_base.num != 0) {
2893                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2894                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2895                                   ist->st->codec->time_base.num * ticks) /
2896                                   ist->st->codec->time_base.den;
2897             }
2898             break;
2899         }
2900         ist->pts = ist->dts;
2901         ist->next_pts = ist->next_dts;
2902     }
2903     for (i = 0; pkt && i < nb_output_streams; i++) {
2904         OutputStream *ost = output_streams[i];
2905
2906         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2907             continue;
2908
2909         do_streamcopy(ist, ost, pkt);
2910     }
2911
2912     return 0;
2913 }
2914
2915 static void print_sdp(void)
2916 {
2917     char sdp[2048];
2918     int i;
2919     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2920
2921     if (!avc)
2922         exit_program(1);
2923     for (i = 0; i < nb_output_files; i++)
2924         avc[i] = output_files[i]->ctx;
2925
2926     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2927     printf("SDP:\n%s\n", sdp);
2928     fflush(stdout);
2929     av_freep(&avc);
2930 }
2931
2932 static int init_input_stream(int ist_index, char *error, int error_len)
2933 {
2934     InputStream *ist = input_streams[ist_index];
2935
2936     if (ist->decoding_needed) {
2937         AVCodec *codec = ist->dec;
2938         if (!codec) {
2939             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2940                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
2941             return AVERROR(EINVAL);
2942         }
2943
2944         ist->dr1 = (codec->capabilities & CODEC_CAP_DR1) && !do_deinterlace;
2945         if (codec->type == AVMEDIA_TYPE_VIDEO && ist->dr1) {
2946             ist->st->codec->get_buffer     = codec_get_buffer;
2947             ist->st->codec->release_buffer = codec_release_buffer;
2948             ist->st->codec->opaque         = ist;
2949         }
2950
2951         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2952             av_dict_set(&ist->opts, "threads", "auto", 0);
2953         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2954             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2955                     ist->file_index, ist->st->index);
2956             return AVERROR(EINVAL);
2957         }
2958         assert_codec_experimental(ist->st->codec, 0);
2959         assert_avoptions(ist->opts);
2960     }
2961
2962     ist->next_pts = AV_NOPTS_VALUE;
2963     ist->next_dts = AV_NOPTS_VALUE;
2964     ist->is_start = 1;
2965
2966     return 0;
2967 }
2968
2969 static InputStream *get_input_stream(OutputStream *ost)
2970 {
2971     if (ost->source_index >= 0)
2972         return input_streams[ost->source_index];
2973
2974     if (ost->filter) {
2975         FilterGraph *fg = ost->filter->graph;
2976         int i;
2977
2978         for (i = 0; i < fg->nb_inputs; i++)
2979             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
2980                 return fg->inputs[i]->ist;
2981     }
2982
2983     return NULL;
2984 }
2985
2986 static int transcode_init(void)
2987 {
2988     int ret = 0, i, j, k;
2989     AVFormatContext *oc;
2990     AVCodecContext *codec, *icodec;
2991     OutputStream *ost;
2992     InputStream *ist;
2993     char error[1024];
2994     int want_sdp = 1;
2995
2996     /* init framerate emulation */
2997     for (i = 0; i < nb_input_files; i++) {
2998         InputFile *ifile = input_files[i];
2999         if (ifile->rate_emu)
3000             for (j = 0; j < ifile->nb_streams; j++)
3001                 input_streams[j + ifile->ist_index]->start = av_gettime();
3002     }
3003
3004     /* output stream init */
3005     for (i = 0; i < nb_output_files; i++) {
3006         oc = output_files[i]->ctx;
3007         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
3008             av_dump_format(oc, i, oc->filename, 1);
3009             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
3010             return AVERROR(EINVAL);
3011         }
3012     }
3013
3014     /* init complex filtergraphs */
3015     for (i = 0; i < nb_filtergraphs; i++)
3016         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
3017             return ret;
3018
3019     /* for each output stream, we compute the right encoding parameters */
3020     for (i = 0; i < nb_output_streams; i++) {
3021         ost = output_streams[i];
3022         oc  = output_files[ost->file_index]->ctx;
3023         ist = get_input_stream(ost);
3024
3025         if (ost->attachment_filename)
3026             continue;
3027
3028         codec  = ost->st->codec;
3029
3030         if (ist) {
3031             icodec = ist->st->codec;
3032
3033             ost->st->disposition          = ist->st->disposition;
3034             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
3035             codec->chroma_sample_location = icodec->chroma_sample_location;
3036         }
3037
3038         if (ost->stream_copy) {
3039             uint64_t extra_size;
3040
3041             av_assert0(ist && !ost->filter);
3042
3043             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
3044
3045             if (extra_size > INT_MAX) {
3046                 return AVERROR(EINVAL);
3047             }
3048
3049             /* if stream_copy is selected, no need to decode or encode */
3050             codec->codec_id   = icodec->codec_id;
3051             codec->codec_type = icodec->codec_type;
3052
3053             if (!codec->codec_tag) {
3054                 if (!oc->oformat->codec_tag ||
3055                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
3056                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
3057                     codec->codec_tag = icodec->codec_tag;
3058             }
3059
3060             codec->bit_rate       = icodec->bit_rate;
3061             codec->rc_max_rate    = icodec->rc_max_rate;
3062             codec->rc_buffer_size = icodec->rc_buffer_size;
3063             codec->field_order    = icodec->field_order;
3064             codec->extradata      = av_mallocz(extra_size);
3065             if (!codec->extradata) {
3066                 return AVERROR(ENOMEM);
3067             }
3068             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
3069             codec->extradata_size= icodec->extradata_size;
3070             codec->bits_per_coded_sample  = icodec->bits_per_coded_sample;
3071
3072             codec->time_base = ist->st->time_base;
3073             /*
3074              * Avi is a special case here because it supports variable fps but
3075              * having the fps and timebase differe significantly adds quite some
3076              * overhead
3077              */
3078             if(!strcmp(oc->oformat->name, "avi")) {
3079                 if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
3080                                  && av_q2d(ist->st->time_base) < 1.0/500
3081                     || copy_tb==0){
3082                     codec->time_base = icodec->time_base;
3083                     codec->time_base.num *= icodec->ticks_per_frame;
3084                     codec->time_base.den *= 2;
3085                     codec->ticks_per_frame = 2;
3086                 }
3087             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
3088                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
3089                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
3090             ) {
3091                 if(   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
3092                                 && av_q2d(ist->st->time_base) < 1.0/500
3093                    || copy_tb==0){
3094                     codec->time_base = icodec->time_base;
3095                     codec->time_base.num *= icodec->ticks_per_frame;
3096                 }
3097             }
3098             av_reduce(&codec->time_base.num, &codec->time_base.den,
3099                         codec->time_base.num, codec->time_base.den, INT_MAX);
3100
3101             switch (codec->codec_type) {
3102             case AVMEDIA_TYPE_AUDIO:
3103                 if (audio_volume != 256) {
3104                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
3105                     exit_program(1);
3106                 }
3107                 codec->channel_layout     = icodec->channel_layout;
3108                 codec->sample_rate        = icodec->sample_rate;
3109                 codec->channels           = icodec->channels;
3110                 codec->frame_size         = icodec->frame_size;
3111                 codec->audio_service_type = icodec->audio_service_type;
3112                 codec->block_align        = icodec->block_align;
3113                 if(codec->block_align == 1 && codec->codec_id == CODEC_ID_MP3)
3114                     codec->block_align= 0;
3115                 if(codec->codec_id == CODEC_ID_AC3)
3116                     codec->block_align= 0;
3117                 break;
3118             case AVMEDIA_TYPE_VIDEO:
3119                 codec->pix_fmt            = icodec->pix_fmt;
3120                 codec->width              = icodec->width;
3121                 codec->height             = icodec->height;
3122                 codec->has_b_frames       = icodec->has_b_frames;
3123                 if (!codec->sample_aspect_ratio.num) {
3124                     codec->sample_aspect_ratio   =
3125                     ost->st->sample_aspect_ratio =
3126                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
3127                         ist->st->codec->sample_aspect_ratio.num ?
3128                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
3129                 }
3130                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
3131                 break;
3132             case AVMEDIA_TYPE_SUBTITLE:
3133                 codec->width  = icodec->width;
3134                 codec->height = icodec->height;
3135                 break;
3136             case AVMEDIA_TYPE_DATA:
3137             case AVMEDIA_TYPE_ATTACHMENT:
3138                 break;
3139             default:
3140                 abort();
3141             }
3142         } else {
3143             if (!ost->enc)
3144                 ost->enc = avcodec_find_encoder(codec->codec_id);
3145             if (!ost->enc) {
3146                 /* should only happen when a default codec is not present. */
3147                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
3148                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
3149                 ret = AVERROR(EINVAL);
3150                 goto dump_format;
3151             }
3152
3153             if (ist)
3154                 ist->decoding_needed = 1;
3155             ost->encoding_needed = 1;
3156
3157             if (!ost->filter &&
3158                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3159                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
3160                     FilterGraph *fg;
3161                     fg = init_simple_filtergraph(ist, ost);
3162                     if (configure_simple_filtergraph(fg)) {
3163                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
3164                         exit(1);
3165                     }
3166             }
3167
3168             switch (codec->codec_type) {
3169             case AVMEDIA_TYPE_AUDIO:
3170                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
3171                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
3172                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
3173                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
3174                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
3175                 break;
3176             case AVMEDIA_TYPE_VIDEO:
3177                 if (ist && !ost->frame_rate.num)
3178                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
3179                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
3180                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
3181                     ost->frame_rate = ost->enc->supported_framerates[idx];
3182                 }
3183                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
3184                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
3185                    && (video_sync_method == VSYNC_CFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
3186                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
3187                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
3188                 }
3189                 for (j = 0; j < ost->forced_kf_count; j++)
3190                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
3191                                                          AV_TIME_BASE_Q,
3192                                                          codec->time_base);
3193
3194                 codec->width  = ost->filter->filter->inputs[0]->w;
3195                 codec->height = ost->filter->filter->inputs[0]->h;
3196                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
3197                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
3198                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
3199                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
3200                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
3201
3202                 if (codec->width   != icodec->width  ||
3203                     codec->height  != icodec->height ||
3204                     codec->pix_fmt != icodec->pix_fmt) {
3205                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
3206                 }
3207
3208                 break;
3209             case AVMEDIA_TYPE_SUBTITLE:
3210                 codec->time_base = (AVRational){1, 1000};
3211                 break;
3212             default:
3213                 abort();
3214                 break;
3215             }
3216             /* two pass mode */
3217             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
3218                 char logfilename[1024];
3219                 FILE *f;
3220
3221                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
3222                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
3223                          i);
3224                 if (!strcmp(ost->enc->name, "libx264")) {
3225                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
3226                 } else {
3227                     if (codec->flags & CODEC_FLAG_PASS2) {
3228                         char  *logbuffer;
3229                         size_t logbuffer_size;
3230                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
3231                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
3232                                    logfilename);
3233                             exit_program(1);
3234                         }
3235                         codec->stats_in = logbuffer;
3236                     }
3237                     if (codec->flags & CODEC_FLAG_PASS1) {
3238                         f = fopen(logfilename, "wb");
3239                         if (!f) {
3240                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
3241                                 logfilename, strerror(errno));
3242                             exit_program(1);
3243                         }
3244                         ost->logfile = f;
3245                     }
3246                 }
3247             }
3248         }
3249     }
3250
3251     /* open each encoder */
3252     for (i = 0; i < nb_output_streams; i++) {
3253         ost = output_streams[i];
3254         if (ost->encoding_needed) {
3255             AVCodec      *codec = ost->enc;
3256             AVCodecContext *dec = NULL;
3257
3258             if ((ist = get_input_stream(ost)))
3259                 dec = ist->st->codec;
3260             if (dec && dec->subtitle_header) {
3261                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
3262                 if (!ost->st->codec->subtitle_header) {
3263                     ret = AVERROR(ENOMEM);
3264                     goto dump_format;
3265                 }
3266                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
3267                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
3268             }
3269             if (!av_dict_get(ost->opts, "threads", NULL, 0))
3270                 av_dict_set(&ost->opts, "threads", "auto", 0);
3271             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
3272                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
3273                         ost->file_index, ost->index);
3274                 ret = AVERROR(EINVAL);
3275                 goto dump_format;
3276             }
3277             assert_codec_experimental(ost->st->codec, 1);
3278             assert_avoptions(ost->opts);
3279             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
3280                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
3281                                              " It takes bits/s as argument, not kbits/s\n");
3282             extra_size += ost->st->codec->extradata_size;
3283
3284             if (ost->st->codec->me_threshold)
3285                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
3286         }
3287     }
3288
3289     /* init input streams */
3290     for (i = 0; i < nb_input_streams; i++)
3291         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
3292             goto dump_format;
3293
3294     /* discard unused programs */
3295     for (i = 0; i < nb_input_files; i++) {
3296         InputFile *ifile = input_files[i];
3297         for (j = 0; j < ifile->ctx->nb_programs; j++) {
3298             AVProgram *p = ifile->ctx->programs[j];
3299             int discard  = AVDISCARD_ALL;
3300
3301             for (k = 0; k < p->nb_stream_indexes; k++)
3302                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
3303                     discard = AVDISCARD_DEFAULT;
3304                     break;
3305                 }
3306             p->discard = discard;
3307         }
3308     }
3309
3310     /* open files and write file headers */
3311     for (i = 0; i < nb_output_files; i++) {
3312         oc = output_files[i]->ctx;
3313         oc->interrupt_callback = int_cb;
3314         if (avformat_write_header(oc, &output_files[i]->opts) < 0) {
3315             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?)", i);
3316             ret = AVERROR(EINVAL);
3317             goto dump_format;
3318         }
3319 //         assert_avoptions(output_files[i]->opts);
3320         if (strcmp(oc->oformat->name, "rtp")) {
3321             want_sdp = 0;
3322         }
3323     }
3324
3325  dump_format:
3326     /* dump the file output parameters - cannot be done before in case
3327        of stream copy */
3328     for (i = 0; i < nb_output_files; i++) {
3329         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
3330     }
3331
3332     /* dump the stream mapping */
3333     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
3334     for (i = 0; i < nb_input_streams; i++) {
3335         ist = input_streams[i];
3336
3337         for (j = 0; j < ist->nb_filters; j++) {
3338             AVFilterLink *link = ist->filters[j]->filter->outputs[0];
3339             if (ist->filters[j]->graph->graph_desc) {
3340                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
3341                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
3342                        link->dst->filter->name);
3343                 if (link->dst->input_count > 1)
3344                     av_log(NULL, AV_LOG_INFO, ":%s", link->dstpad->name);
3345                 if (nb_filtergraphs > 1)
3346                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
3347                 av_log(NULL, AV_LOG_INFO, "\n");
3348             }
3349         }
3350     }
3351
3352     for (i = 0; i < nb_output_streams; i++) {
3353         ost = output_streams[i];
3354
3355         if (ost->attachment_filename) {
3356             /* an attached file */
3357             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
3358                    ost->attachment_filename, ost->file_index, ost->index);
3359             continue;
3360         }
3361
3362         if (ost->filter && ost->filter->graph->graph_desc) {
3363             /* output from a complex graph */
3364             AVFilterLink *link = ost->filter->filter->inputs[0];
3365             av_log(NULL, AV_LOG_INFO, "  %s", link->src->filter->name);
3366             if (link->src->output_count > 1)
3367                 av_log(NULL, AV_LOG_INFO, ":%s", link->srcpad->name);
3368             if (nb_filtergraphs > 1)
3369                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
3370
3371             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
3372                    ost->index, ost->enc ? ost->enc->name : "?");
3373             continue;
3374         }
3375
3376         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
3377                input_streams[ost->source_index]->file_index,
3378                input_streams[ost->source_index]->st->index,
3379                ost->file_index,
3380                ost->index);
3381         if (ost->sync_ist != input_streams[ost->source_index])
3382             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
3383                    ost->sync_ist->file_index,
3384                    ost->sync_ist->st->index);
3385         if (ost->stream_copy)
3386             av_log(NULL, AV_LOG_INFO, " (copy)");
3387         else
3388             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
3389                    input_streams[ost->source_index]->dec->name : "?",
3390                    ost->enc ? ost->enc->name : "?");
3391         av_log(NULL, AV_LOG_INFO, "\n");
3392     }
3393
3394     if (ret) {
3395         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
3396         return ret;
3397     }
3398
3399     if (want_sdp) {
3400         print_sdp();
3401     }
3402
3403     return 0;
3404 }
3405
3406 /*
3407  * The following code is the main loop of the file converter
3408  */
3409 static int transcode(void)
3410 {
3411     int ret, i;
3412     AVFormatContext *is, *os;
3413     OutputStream *ost;
3414     InputStream *ist;
3415     uint8_t *no_packet;
3416     int no_packet_count = 0;
3417     int64_t timer_start;
3418     int key;
3419
3420     if (!(no_packet = av_mallocz(nb_input_files)))
3421         exit_program(1);
3422
3423     ret = transcode_init();
3424     if (ret < 0)
3425         goto fail;
3426
3427     if (!using_stdin) {
3428         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
3429     }
3430
3431     timer_start = av_gettime();
3432
3433     for (; received_sigterm == 0;) {
3434         int file_index, ist_index, past_recording_time = 1;
3435         AVPacket pkt;
3436         int64_t ipts_min;
3437         int64_t cur_time= av_gettime();
3438
3439         ipts_min = INT64_MAX;
3440         /* if 'q' pressed, exits */
3441         if (!using_stdin) {
3442             static int64_t last_time;
3443             if (received_nb_signals)
3444                 break;
3445             /* read_key() returns 0 on EOF */
3446             if(cur_time - last_time >= 100000 && !run_as_daemon){
3447                 key =  read_key();
3448                 last_time = cur_time;
3449             }else
3450                 key = -1;
3451             if (key == 'q')
3452                 break;
3453             if (key == '+') av_log_set_level(av_log_get_level()+10);
3454             if (key == '-') av_log_set_level(av_log_get_level()-10);
3455             if (key == 's') qp_hist     ^= 1;
3456             if (key == 'h'){
3457                 if (do_hex_dump){
3458                     do_hex_dump = do_pkt_dump = 0;
3459                 } else if(do_pkt_dump){
3460                     do_hex_dump = 1;
3461                 } else
3462                     do_pkt_dump = 1;
3463                 av_log_set_level(AV_LOG_DEBUG);
3464             }
3465             if (key == 'c' || key == 'C'){
3466                 char buf[4096], target[64], command[256], arg[256] = {0};
3467                 double time;
3468                 int k, n = 0;
3469                 fprintf(stderr, "\nEnter command: <target> <time> <command>[ <argument>]\n");
3470                 i = 0;
3471                 while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3472                     if (k > 0)
3473                         buf[i++] = k;
3474                 buf[i] = 0;
3475                 if (k > 0 &&
3476                     (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
3477                     av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
3478                            target, time, command, arg);
3479                     for (i = 0; i < nb_filtergraphs; i++) {
3480                         FilterGraph *fg = filtergraphs[i];
3481                         if (fg->graph) {
3482                             if (time < 0) {
3483                                 ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
3484                                                                   key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
3485                                 fprintf(stderr, "Command reply for stream %d: ret:%d res:%s\n", i, ret, buf);
3486                             } else {
3487                                 ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
3488                             }
3489                         }
3490                     }
3491                 } else {
3492                     av_log(NULL, AV_LOG_ERROR,
3493                            "Parse error, at least 3 arguments were expected, "
3494                            "only %d given in string '%s'\n", n, buf);
3495                 }
3496             }
3497             if (key == 'd' || key == 'D'){
3498                 int debug=0;
3499                 if(key == 'D') {
3500                     debug = input_streams[0]->st->codec->debug<<1;
3501                     if(!debug) debug = 1;
3502                     while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
3503                         debug += debug;
3504                 }else
3505                     if(scanf("%d", &debug)!=1)
3506                         fprintf(stderr,"error parsing debug value\n");
3507                 for(i=0;i<nb_input_streams;i++) {
3508                     input_streams[i]->st->codec->debug = debug;
3509                 }
3510                 for(i=0;i<nb_output_streams;i++) {
3511                     ost = output_streams[i];
3512                     ost->st->codec->debug = debug;
3513                 }
3514                 if(debug) av_log_set_level(AV_LOG_DEBUG);
3515                 fprintf(stderr,"debug=%d\n", debug);
3516             }
3517             if (key == '?'){
3518                 fprintf(stderr, "key    function\n"
3519                                 "?      show this help\n"
3520                                 "+      increase verbosity\n"
3521                                 "-      decrease verbosity\n"
3522                                 "c      Send command to filtergraph\n"
3523                                 "D      cycle through available debug modes\n"
3524                                 "h      dump packets/hex press to cycle through the 3 states\n"
3525                                 "q      quit\n"
3526                                 "s      Show QP histogram\n"
3527                 );
3528             }
3529         }
3530
3531         /* check if there's any stream where output is still needed */
3532         for (i = 0; i < nb_output_streams; i++) {
3533             OutputFile *of;
3534             ost = output_streams[i];
3535             of  = output_files[ost->file_index];
3536             os  = output_files[ost->file_index]->ctx;
3537             if (ost->is_past_recording_time ||
3538                 (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3539                 continue;
3540             if (ost->frame_number >= ost->max_frames) {
3541                 int j;
3542                 for (j = 0; j < of->ctx->nb_streams; j++)
3543                     output_streams[of->ost_index + j]->is_past_recording_time = 1;
3544                 continue;
3545             }
3546             past_recording_time = 0;
3547         }
3548         if (past_recording_time)
3549             break;
3550
3551         /* select the stream that we must read now by looking at the
3552            smallest output pts */
3553         file_index = -1;
3554         for (i = 0; i < nb_input_streams; i++) {
3555             int64_t ipts;
3556             ist = input_streams[i];
3557             ipts = ist->pts;
3558             if (ist->discard || no_packet[ist->file_index])
3559                 continue;
3560             if (!input_files[ist->file_index]->eof_reached) {
3561                 if (ipts < ipts_min) {
3562                     ipts_min = ipts;
3563                     file_index = ist->file_index;
3564                 }
3565             }
3566         }
3567         /* if none, if is finished */
3568         if (file_index < 0) {
3569             if (no_packet_count) {
3570                 no_packet_count = 0;
3571                 memset(no_packet, 0, nb_input_files);
3572                 usleep(10000);
3573                 continue;
3574             }
3575             break;
3576         }
3577
3578         /* read a frame from it and output it in the fifo */
3579         is  = input_files[file_index]->ctx;
3580         ret = av_read_frame(is, &pkt);
3581         if (ret == AVERROR(EAGAIN)) {
3582             no_packet[file_index] = 1;
3583             no_packet_count++;
3584             continue;
3585         }
3586         if (ret < 0) {
3587             input_files[file_index]->eof_reached = 1;
3588
3589             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
3590                 ist = input_streams[input_files[file_index]->ist_index + i];
3591                 if (ist->decoding_needed)
3592                     output_packet(ist, NULL);
3593             }
3594
3595             if (opt_shortest)
3596                 break;
3597             else
3598                 continue;
3599         }
3600
3601         no_packet_count = 0;
3602         memset(no_packet, 0, nb_input_files);
3603
3604         if (do_pkt_dump) {
3605             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3606                              is->streams[pkt.stream_index]);
3607         }
3608         /* the following test is needed in case new streams appear
3609            dynamically in stream : we ignore them */
3610         if (pkt.stream_index >= input_files[file_index]->nb_streams)
3611             goto discard_packet;
3612         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
3613         ist = input_streams[ist_index];
3614         if (ist->discard)
3615             goto discard_packet;
3616
3617         if (pkt.dts != AV_NOPTS_VALUE)
3618             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3619         if (pkt.pts != AV_NOPTS_VALUE)
3620             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3621
3622         if (pkt.pts != AV_NOPTS_VALUE)
3623             pkt.pts *= ist->ts_scale;
3624         if (pkt.dts != AV_NOPTS_VALUE)
3625             pkt.dts *= ist->ts_scale;
3626
3627         if (debug_ts) {
3628             av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "