d1ed3c67deccf45a1ff2528b5f8386d9d775a536
[ffmpeg.git] / ffmpeg.c
1 /*
2  * Copyright (c) 2000-2003 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 /**
22  * @file
23  * multimedia converter based on the FFmpeg libraries
24  */
25
26 #include "config.h"
27 #include <ctype.h>
28 #include <string.h>
29 #include <math.h>
30 #include <stdlib.h>
31 #include <errno.h>
32 #include <signal.h>
33 #include <limits.h>
34 #include <unistd.h>
35 #include "libavformat/avformat.h"
36 #include "libavdevice/avdevice.h"
37 #include "libswscale/swscale.h"
38 #include "libavutil/opt.h"
39 #include "libavcodec/audioconvert.h"
40 #include "libavutil/audioconvert.h"
41 #include "libavutil/parseutils.h"
42 #include "libavutil/samplefmt.h"
43 #include "libavutil/colorspace.h"
44 #include "libavutil/fifo.h"
45 #include "libavutil/intreadwrite.h"
46 #include "libavutil/dict.h"
47 #include "libavutil/mathematics.h"
48 #include "libavutil/pixdesc.h"
49 #include "libavutil/avstring.h"
50 #include "libavutil/libm.h"
51 #include "libavutil/imgutils.h"
52 #include "libavutil/timestamp.h"
53 #include "libavformat/os_support.h"
54 #include "libswresample/swresample.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/buffersink.h"
62 # include "libavfilter/buffersrc.h"
63 # include "libavfilter/vsrc_buffer.h"
64
65 #if HAVE_SYS_RESOURCE_H
66 #include <sys/types.h>
67 #include <sys/time.h>
68 #include <sys/resource.h>
69 #elif HAVE_GETPROCESSTIMES
70 #include <windows.h>
71 #endif
72 #if HAVE_GETPROCESSMEMORYINFO
73 #include <windows.h>
74 #include <psapi.h>
75 #endif
76
77 #if HAVE_SYS_SELECT_H
78 #include <sys/select.h>
79 #endif
80
81 #if HAVE_TERMIOS_H
82 #include <fcntl.h>
83 #include <sys/ioctl.h>
84 #include <sys/time.h>
85 #include <termios.h>
86 #elif HAVE_KBHIT
87 #include <conio.h>
88 #endif
89 #include <time.h>
90
91 #include "cmdutils.h"
92
93 #include "libavutil/avassert.h"
94
95 #define VSYNC_AUTO       -1
96 #define VSYNC_PASSTHROUGH 0
97 #define VSYNC_CFR         1
98 #define VSYNC_VFR         2
99 #define VSYNC_DROP        0xff
100
101 const char program_name[] = "ffmpeg";
102 const int program_birth_year = 2000;
103
104 /* select an input stream for an output stream */
105 typedef struct StreamMap {
106     int disabled;           /** 1 is this mapping is disabled by a negative map */
107     int file_index;
108     int stream_index;
109     int sync_file_index;
110     int sync_stream_index;
111     char *linklabel;       /** name of an output link, for mapping lavfi outputs */
112 } StreamMap;
113
114 typedef struct {
115     int  file_idx,  stream_idx,  channel_idx; // input
116     int ofile_idx, ostream_idx;               // output
117 } AudioChannelMap;
118
119 static const OptionDef options[];
120
121 #define MAX_STREAMS 1024    /* arbitrary sanity check value */
122
123 static int frame_bits_per_raw_sample = 0;
124 static int video_discard = 0;
125 static int same_quant = 0;
126 static int do_deinterlace = 0;
127 static int intra_dc_precision = 8;
128 static int qp_hist = 0;
129 static int intra_only = 0;
130 static const char *video_codec_name    = NULL;
131 static const char *audio_codec_name    = NULL;
132 static const char *subtitle_codec_name = NULL;
133
134 static int file_overwrite = 0;
135 static int no_file_overwrite = 0;
136 static int do_benchmark = 0;
137 static int do_benchmark_all = 0;
138 static int do_hex_dump = 0;
139 static int do_pkt_dump = 0;
140 static int do_psnr = 0;
141 static int do_pass = 0;
142 static const char *pass_logfilename_prefix;
143 static int video_sync_method = VSYNC_AUTO;
144 static int audio_sync_method = 0;
145 static float audio_drift_threshold = 0.1;
146 static int copy_ts = 0;
147 static int copy_tb = -1;
148 static int opt_shortest = 0;
149 static char *vstats_filename;
150 static FILE *vstats_file;
151
152 static int audio_volume = 256;
153
154 static int exit_on_error = 0;
155 static int using_stdin = 0;
156 static int run_as_daemon  = 0;
157 static volatile int received_nb_signals = 0;
158 static int64_t video_size = 0;
159 static int64_t audio_size = 0;
160 static int64_t extra_size = 0;
161 static int nb_frames_dup = 0;
162 static int nb_frames_drop = 0;
163 static int input_sync;
164
165 static float dts_delta_threshold = 10;
166 static float dts_error_threshold = 3600*30;
167
168 static int print_stats = 1;
169 static int debug_ts = 0;
170 static int current_time;
171
172 static uint8_t *audio_buf;
173 static unsigned int allocated_audio_buf_size;
174 static uint8_t *async_buf;
175 static unsigned int allocated_async_buf_size;
176
177 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
178
179 typedef struct InputFilter {
180     AVFilterContext    *filter;
181     struct InputStream *ist;
182     struct FilterGraph *graph;
183 } InputFilter;
184
185 typedef struct OutputFilter {
186     AVFilterContext     *filter;
187     struct OutputStream *ost;
188     struct FilterGraph  *graph;
189
190     /* temporary storage until stream maps are processed */
191     AVFilterInOut       *out_tmp;
192 } OutputFilter;
193
194 typedef struct FilterGraph {
195     int            index;
196     const char    *graph_desc;
197
198     AVFilterGraph *graph;
199
200     InputFilter   **inputs;
201     int          nb_inputs;
202     OutputFilter **outputs;
203     int         nb_outputs;
204 } FilterGraph;
205
206 typedef struct FrameBuffer {
207     uint8_t *base[4];
208     uint8_t *data[4];
209     int  linesize[4];
210
211     int h, w;
212     enum PixelFormat pix_fmt;
213
214     int refcount;
215     struct InputStream *ist;
216     struct FrameBuffer *next;
217 } FrameBuffer;
218
219 typedef struct InputStream {
220     int file_index;
221     AVStream *st;
222     int discard;             /* true if stream data should be discarded */
223     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
224     AVCodec *dec;
225     AVFrame *decoded_frame;
226
227     int64_t       start;     /* time when read started */
228     /* predicted dts of the next packet read for this stream or (when there are
229      * several frames in a packet) of the next frame in current packet */
230     int64_t       next_dts;
231     /* dts of the last packet read for this stream */
232     int64_t       dts;
233
234     int64_t       next_pts;  ///< synthetic pts for the next decode frame
235     int64_t       pts;       ///< current pts of the decoded frame
236     double ts_scale;
237     int is_start;            /* is 1 at the start and after a discontinuity */
238     int showed_multi_packet_warning;
239     AVDictionary *opts;
240
241     int resample_height;
242     int resample_width;
243     int resample_pix_fmt;
244
245     /* a pool of free buffers for decoded data */
246     FrameBuffer *buffer_pool;
247     int dr1;
248
249     /* decoded data from this stream goes into all those filters
250      * currently video only */
251     InputFilter **filters;
252     int        nb_filters;
253 } InputStream;
254
255 typedef struct InputFile {
256     AVFormatContext *ctx;
257     int eof_reached;      /* true if eof reached */
258     int ist_index;        /* index of first stream in input_streams */
259     int buffer_size;      /* current total buffer size */
260     int64_t ts_offset;
261     int nb_streams;       /* number of stream that ffmpeg is aware of; may be different
262                              from ctx.nb_streams if new streams appear during av_read_frame() */
263     int rate_emu;
264 } InputFile;
265
266 typedef struct OutputStream {
267     int file_index;          /* file index */
268     int index;               /* stream index in the output file */
269     int source_index;        /* InputStream index */
270     AVStream *st;            /* stream in the output file */
271     int encoding_needed;     /* true if encoding needed for this stream */
272     int frame_number;
273     /* input pts and corresponding output pts
274        for A/V sync */
275     struct InputStream *sync_ist; /* input stream to sync against */
276     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
277     AVBitStreamFilterContext *bitstream_filters;
278     AVCodec *enc;
279     int64_t max_frames;
280     AVFrame *output_frame;
281     AVFrame *filtered_frame;
282
283     /* video only */
284     AVRational frame_rate;
285     int force_fps;
286     int top_field_first;
287
288     float frame_aspect_ratio;
289     float last_quality;
290
291     /* forced key frames */
292     int64_t *forced_kf_pts;
293     int forced_kf_count;
294     int forced_kf_index;
295
296     /* audio only */
297     int audio_resample;
298     int audio_channels_map[SWR_CH_MAX];  ///< list of the channels id to pick from the source stream
299     int audio_channels_mapped;           ///< number of channels in audio_channels_map
300     int resample_sample_fmt;
301     int resample_channels;
302     int resample_sample_rate;
303     float rematrix_volume;
304     AVFifoBuffer *fifo;     /* for compression: one audio fifo per codec */
305     FILE *logfile;
306
307     SwrContext *swr;
308
309     OutputFilter *filter;
310     char *avfilter;
311
312     int64_t sws_flags;
313     int64_t swr_dither_method;
314     double swr_dither_scale;
315     AVDictionary *opts;
316     int is_past_recording_time;
317     int stream_copy;
318     const char *attachment_filename;
319     int copy_initial_nonkeyframes;
320
321     enum PixelFormat pix_fmts[2];
322 } OutputStream;
323
324
325 #if HAVE_TERMIOS_H
326
327 /* init terminal so that we can grab keys */
328 static struct termios oldtty;
329 static int restore_tty;
330 #endif
331
332 typedef struct OutputFile {
333     AVFormatContext *ctx;
334     AVDictionary *opts;
335     int ost_index;       /* index of the first stream in output_streams */
336     int64_t recording_time; /* desired length of the resulting file in microseconds */
337     int64_t start_time;     /* start time in microseconds */
338     uint64_t limit_filesize; /* filesize limit expressed in bytes */
339 } OutputFile;
340
341 static InputStream **input_streams = NULL;
342 static int        nb_input_streams = 0;
343 static InputFile   **input_files   = NULL;
344 static int        nb_input_files   = 0;
345
346 static OutputStream **output_streams = NULL;
347 static int         nb_output_streams = 0;
348 static OutputFile   **output_files   = NULL;
349 static int         nb_output_files   = 0;
350
351 static FilterGraph **filtergraphs;
352 int               nb_filtergraphs;
353
354 typedef struct OptionsContext {
355     /* input/output options */
356     int64_t start_time;
357     const char *format;
358
359     SpecifierOpt *codec_names;
360     int        nb_codec_names;
361     SpecifierOpt *audio_channels;
362     int        nb_audio_channels;
363     SpecifierOpt *audio_sample_rate;
364     int        nb_audio_sample_rate;
365     SpecifierOpt *rematrix_volume;
366     int        nb_rematrix_volume;
367     SpecifierOpt *frame_rates;
368     int        nb_frame_rates;
369     SpecifierOpt *frame_sizes;
370     int        nb_frame_sizes;
371     SpecifierOpt *frame_pix_fmts;
372     int        nb_frame_pix_fmts;
373
374     /* input options */
375     int64_t input_ts_offset;
376     int rate_emu;
377
378     SpecifierOpt *ts_scale;
379     int        nb_ts_scale;
380     SpecifierOpt *dump_attachment;
381     int        nb_dump_attachment;
382
383     /* output options */
384     StreamMap *stream_maps;
385     int     nb_stream_maps;
386     AudioChannelMap *audio_channel_maps; ///< one info entry per -map_channel
387     int           nb_audio_channel_maps; ///< number of (valid) -map_channel settings
388     int metadata_global_manual;
389     int metadata_streams_manual;
390     int metadata_chapters_manual;
391     const char **attachments;
392     int       nb_attachments;
393
394     int chapters_input_file;
395
396     int64_t recording_time;
397     uint64_t limit_filesize;
398     float mux_preload;
399     float mux_max_delay;
400
401     int video_disable;
402     int audio_disable;
403     int subtitle_disable;
404     int data_disable;
405
406     /* indexed by output file stream index */
407     int   *streamid_map;
408     int nb_streamid_map;
409
410     SpecifierOpt *metadata;
411     int        nb_metadata;
412     SpecifierOpt *max_frames;
413     int        nb_max_frames;
414     SpecifierOpt *bitstream_filters;
415     int        nb_bitstream_filters;
416     SpecifierOpt *codec_tags;
417     int        nb_codec_tags;
418     SpecifierOpt *sample_fmts;
419     int        nb_sample_fmts;
420     SpecifierOpt *qscale;
421     int        nb_qscale;
422     SpecifierOpt *forced_key_frames;
423     int        nb_forced_key_frames;
424     SpecifierOpt *force_fps;
425     int        nb_force_fps;
426     SpecifierOpt *frame_aspect_ratios;
427     int        nb_frame_aspect_ratios;
428     SpecifierOpt *rc_overrides;
429     int        nb_rc_overrides;
430     SpecifierOpt *intra_matrices;
431     int        nb_intra_matrices;
432     SpecifierOpt *inter_matrices;
433     int        nb_inter_matrices;
434     SpecifierOpt *top_field_first;
435     int        nb_top_field_first;
436     SpecifierOpt *metadata_map;
437     int        nb_metadata_map;
438     SpecifierOpt *presets;
439     int        nb_presets;
440     SpecifierOpt *copy_initial_nonkeyframes;
441     int        nb_copy_initial_nonkeyframes;
442     SpecifierOpt *filters;
443     int        nb_filters;
444 } OptionsContext;
445
446 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
447 {\
448     int i, ret;\
449     for (i = 0; i < o->nb_ ## name; i++) {\
450         char *spec = o->name[i].specifier;\
451         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
452             outvar = o->name[i].u.type;\
453         else if (ret < 0)\
454             exit_program(1);\
455     }\
456 }
457
458 static int64_t getutime(void)
459 {
460 #if HAVE_GETRUSAGE
461     struct rusage rusage;
462
463     getrusage(RUSAGE_SELF, &rusage);
464     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
465 #elif HAVE_GETPROCESSTIMES
466     HANDLE proc;
467     FILETIME c, e, k, u;
468     proc = GetCurrentProcess();
469     GetProcessTimes(proc, &c, &e, &k, &u);
470     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
471 #else
472     return av_gettime();
473 #endif
474 }
475
476 static void update_benchmark(const char *fmt, ...)
477 {
478     if (do_benchmark_all) {
479         int64_t t = getutime();
480         va_list va;
481         char buf[1024];
482
483         if (fmt) {
484             va_start(va, fmt);
485             vsnprintf(buf, sizeof(buf), fmt, va);
486             va_end(va);
487             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
488         }
489         current_time = t;
490     }
491 }
492
493 static void reset_options(OptionsContext *o, int is_input)
494 {
495     const OptionDef *po = options;
496     OptionsContext bak= *o;
497     int i;
498
499     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
500     while (po->name) {
501         void *dst = (uint8_t*)o + po->u.off;
502
503         if (po->flags & OPT_SPEC) {
504             SpecifierOpt **so = dst;
505             int i, *count = (int*)(so + 1);
506             for (i = 0; i < *count; i++) {
507                 av_freep(&(*so)[i].specifier);
508                 if (po->flags & OPT_STRING)
509                     av_freep(&(*so)[i].u.str);
510             }
511             av_freep(so);
512             *count = 0;
513         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
514             av_freep(dst);
515         po++;
516     }
517
518     for (i = 0; i < o->nb_stream_maps; i++)
519         av_freep(&o->stream_maps[i].linklabel);
520     av_freep(&o->stream_maps);
521     av_freep(&o->audio_channel_maps);
522     av_freep(&o->streamid_map);
523
524     memset(o, 0, sizeof(*o));
525
526     if(is_input) o->recording_time = bak.recording_time;
527     else         o->recording_time = INT64_MAX;
528     o->mux_max_delay  = 0.7;
529     o->limit_filesize = UINT64_MAX;
530     o->chapters_input_file = INT_MAX;
531
532     uninit_opts();
533     init_opts();
534 }
535
536 static int alloc_buffer(InputStream *ist, AVCodecContext *s, FrameBuffer **pbuf)
537 {
538     FrameBuffer  *buf = av_mallocz(sizeof(*buf));
539     int i, ret;
540     const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
541     int h_chroma_shift, v_chroma_shift;
542     int edge = 32; // XXX should be avcodec_get_edge_width(), but that fails on svq1
543     int w = s->width, h = s->height;
544
545     if (!buf)
546         return AVERROR(ENOMEM);
547
548     if (!(s->flags & CODEC_FLAG_EMU_EDGE)) {
549         w += 2*edge;
550         h += 2*edge;
551     }
552
553     avcodec_align_dimensions(s, &w, &h);
554     if ((ret = av_image_alloc(buf->base, buf->linesize, w, h,
555                               s->pix_fmt, 32)) < 0) {
556         av_freep(&buf);
557         return ret;
558     }
559     /* XXX this shouldn't be needed, but some tests break without this line
560      * those decoders are buggy and need to be fixed.
561      * the following tests fail:
562      * cdgraphics, ansi, aasc, fraps-v1, qtrle-1bit
563      */
564     memset(buf->base[0], 128, ret);
565
566     avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
567     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
568         const int h_shift = i==0 ? 0 : h_chroma_shift;
569         const int v_shift = i==0 ? 0 : v_chroma_shift;
570         if ((s->flags & CODEC_FLAG_EMU_EDGE) || !buf->linesize[1])
571             buf->data[i] = buf->base[i];
572         else
573             buf->data[i] = buf->base[i] +
574                            FFALIGN((buf->linesize[i]*edge >> v_shift) +
575                                    (pixel_size*edge >> h_shift), 32);
576     }
577     buf->w       = s->width;
578     buf->h       = s->height;
579     buf->pix_fmt = s->pix_fmt;
580     buf->ist     = ist;
581
582     *pbuf = buf;
583     return 0;
584 }
585
586 static void free_buffer_pool(InputStream *ist)
587 {
588     FrameBuffer *buf = ist->buffer_pool;
589     while (buf) {
590         ist->buffer_pool = buf->next;
591         av_freep(&buf->base[0]);
592         av_free(buf);
593         buf = ist->buffer_pool;
594     }
595 }
596
597 static void unref_buffer(InputStream *ist, FrameBuffer *buf)
598 {
599     av_assert0(buf->refcount > 0);
600     buf->refcount--;
601     if (!buf->refcount) {
602         FrameBuffer *tmp;
603         for(tmp= ist->buffer_pool; tmp; tmp= tmp->next)
604             av_assert1(tmp != buf);
605         buf->next = ist->buffer_pool;
606         ist->buffer_pool = buf;
607     }
608 }
609
610 static int codec_get_buffer(AVCodecContext *s, AVFrame *frame)
611 {
612     InputStream *ist = s->opaque;
613     FrameBuffer *buf;
614     int ret, i;
615
616     if(av_image_check_size(s->width, s->height, 0, s) || s->pix_fmt<0)
617         return -1;
618
619     if (!ist->buffer_pool && (ret = alloc_buffer(ist, s, &ist->buffer_pool)) < 0)
620         return ret;
621
622     buf              = ist->buffer_pool;
623     ist->buffer_pool = buf->next;
624     buf->next        = NULL;
625     if (buf->w != s->width || buf->h != s->height || buf->pix_fmt != s->pix_fmt) {
626         av_freep(&buf->base[0]);
627         av_free(buf);
628         if ((ret = alloc_buffer(ist, s, &buf)) < 0)
629             return ret;
630     }
631     av_assert0(!buf->refcount);
632     buf->refcount++;
633
634     frame->opaque        = buf;
635     frame->type          = FF_BUFFER_TYPE_USER;
636     frame->extended_data = frame->data;
637     frame->pkt_pts       = s->pkt ? s->pkt->pts : AV_NOPTS_VALUE;
638     frame->width         = buf->w;
639     frame->height        = buf->h;
640     frame->format        = buf->pix_fmt;
641     frame->sample_aspect_ratio = s->sample_aspect_ratio;
642
643     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
644         frame->base[i]     = buf->base[i];  // XXX h264.c uses base though it shouldn't
645         frame->data[i]     = buf->data[i];
646         frame->linesize[i] = buf->linesize[i];
647     }
648
649     return 0;
650 }
651
652 static void codec_release_buffer(AVCodecContext *s, AVFrame *frame)
653 {
654     InputStream *ist = s->opaque;
655     FrameBuffer *buf = frame->opaque;
656     int i;
657
658     if(frame->type!=FF_BUFFER_TYPE_USER)
659         return avcodec_default_release_buffer(s, frame);
660
661     for (i = 0; i < FF_ARRAY_ELEMS(frame->data); i++)
662         frame->data[i] = NULL;
663
664     unref_buffer(ist, buf);
665 }
666
667 static void filter_release_buffer(AVFilterBuffer *fb)
668 {
669     FrameBuffer *buf = fb->priv;
670     av_free(fb);
671     unref_buffer(buf->ist, buf);
672 }
673
674 static enum PixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum PixelFormat target)
675 {
676     if (codec && codec->pix_fmts) {
677         const enum PixelFormat *p = codec->pix_fmts;
678         int has_alpha= av_pix_fmt_descriptors[target].nb_components % 2 == 0;
679         enum PixelFormat best= PIX_FMT_NONE;
680         if (st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
681             if (st->codec->codec_id == CODEC_ID_MJPEG) {
682                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
683             } else if (st->codec->codec_id == CODEC_ID_LJPEG) {
684                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
685                                                  PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
686             }
687         }
688         for (; *p != PIX_FMT_NONE; p++) {
689             best= avcodec_find_best_pix_fmt2(best, *p, target, has_alpha, NULL);
690             if (*p == target)
691                 break;
692         }
693         if (*p == PIX_FMT_NONE) {
694             if (target != PIX_FMT_NONE)
695                 av_log(NULL, AV_LOG_WARNING,
696                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
697                        av_pix_fmt_descriptors[target].name,
698                        codec->name,
699                        av_pix_fmt_descriptors[best].name);
700             return best;
701         }
702     }
703     return target;
704 }
705
706 static const enum PixelFormat *choose_pixel_fmts(OutputStream *ost)
707 {
708     if (ost->st->codec->pix_fmt != PIX_FMT_NONE) {
709         ost->pix_fmts[0] = choose_pixel_fmt(ost->st, ost->enc, ost->st->codec->pix_fmt);
710         return ost->pix_fmts;
711     } else if (ost->enc->pix_fmts) {
712         if (ost->st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
713             if (ost->st->codec->codec_id == CODEC_ID_MJPEG) {
714                 return (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
715             } else if (ost->st->codec->codec_id == CODEC_ID_LJPEG) {
716                 return (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
717                                                     PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
718             }
719         }
720         return ost->enc->pix_fmts;
721     } else
722         return NULL;
723 }
724
725 static int configure_video_filters(FilterGraph *fg)
726 {
727     InputStream  *ist = fg->inputs[0]->ist;
728     OutputStream *ost = fg->outputs[0]->ost;
729     AVFilterContext *last_filter, *filter;
730     /** filter graph containing all filters including input & output */
731     AVCodecContext *codec = ost->st->codec;
732     enum PixelFormat *pix_fmts = choose_pixel_fmts(ost);
733     AVBufferSinkParams *buffersink_params = av_buffersink_params_alloc();
734     AVRational sample_aspect_ratio;
735     char args[255];
736     int ret;
737
738     avfilter_graph_free(&fg->graph);
739     fg->graph = avfilter_graph_alloc();
740     if (!fg->graph)
741         return AVERROR(ENOMEM);
742
743     if (ist->st->sample_aspect_ratio.num) {
744         sample_aspect_ratio = ist->st->sample_aspect_ratio;
745     } else
746         sample_aspect_ratio = ist->st->codec->sample_aspect_ratio;
747
748     snprintf(args, 255, "%d:%d:%d:%d:%d:%d:%d:flags=%d", ist->st->codec->width,
749              ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
750              sample_aspect_ratio.num, sample_aspect_ratio.den, SWS_BILINEAR + ((ist->st->codec->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
751
752     ret = avfilter_graph_create_filter(&fg->inputs[0]->filter,
753                                        avfilter_get_by_name("buffer"),
754                                        "src", args, NULL, fg->graph);
755     if (ret < 0)
756         return ret;
757
758 #if FF_API_OLD_VSINK_API
759     ret = avfilter_graph_create_filter(&fg->outputs[0]->filter, avfilter_get_by_name("buffersink"),
760                                        "out", NULL, pix_fmts, fg->graph);
761 #else
762     buffersink_params->pixel_fmts = pix_fmts;
763     ret = avfilter_graph_create_filter(&fg->outputs[0]->filter, avfilter_get_by_name("buffersink"),
764                                        "out", NULL, buffersink_params, fg->graph);
765 #endif
766     av_freep(&buffersink_params);
767
768     if (ret < 0)
769         return ret;
770     last_filter = fg->inputs[0]->filter;
771
772     if (codec->width || codec->height) {
773         snprintf(args, 255, "%d:%d:flags=0x%X",
774                  codec->width,
775                  codec->height,
776                  (unsigned)ost->sws_flags);
777         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
778                                                 NULL, args, NULL, fg->graph)) < 0)
779             return ret;
780         if ((ret = avfilter_link(last_filter, 0, filter, 0)) < 0)
781             return ret;
782         last_filter = filter;
783     }
784
785     snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
786     fg->graph->scale_sws_opts = av_strdup(args);
787
788     if (ost->avfilter) {
789         AVFilterInOut *outputs = avfilter_inout_alloc();
790         AVFilterInOut *inputs  = avfilter_inout_alloc();
791
792         outputs->name    = av_strdup("in");
793         outputs->filter_ctx = last_filter;
794         outputs->pad_idx = 0;
795         outputs->next    = NULL;
796
797         inputs->name    = av_strdup("out");
798         inputs->filter_ctx = fg->outputs[0]->filter;
799         inputs->pad_idx = 0;
800         inputs->next    = NULL;
801
802         if ((ret = avfilter_graph_parse(fg->graph, ost->avfilter, &inputs, &outputs, NULL)) < 0)
803             return ret;
804         av_freep(&ost->avfilter);
805     } else {
806         if ((ret = avfilter_link(last_filter, 0, fg->outputs[0]->filter, 0)) < 0)
807             return ret;
808     }
809
810     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
811         return ret;
812
813     ost->filter = fg->outputs[0];
814
815     return 0;
816 }
817
818 static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
819 {
820     FilterGraph *fg = av_mallocz(sizeof(*fg));
821
822     if (!fg)
823         exit_program(1);
824     fg->index = nb_filtergraphs;
825
826     fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
827                              fg->nb_outputs + 1);
828     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
829         exit_program(1);
830     fg->outputs[0]->ost   = ost;
831     fg->outputs[0]->graph = fg;
832
833     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
834                             fg->nb_inputs + 1);
835     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
836         exit_program(1);
837     fg->inputs[0]->ist   = ist;
838     fg->inputs[0]->graph = fg;
839
840     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
841                               &ist->nb_filters, ist->nb_filters + 1);
842     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
843
844     filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
845                               &nb_filtergraphs, nb_filtergraphs + 1);
846     filtergraphs[nb_filtergraphs - 1] = fg;
847
848     return fg;
849 }
850
851 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
852 {
853     InputStream *ist;
854     enum AVMediaType type = in->filter_ctx->input_pads[in->pad_idx].type;
855     int i;
856
857     // TODO: support other filter types
858     if (type != AVMEDIA_TYPE_VIDEO) {
859         av_log(NULL, AV_LOG_FATAL, "Only video filters supported currently.\n");
860         exit_program(1);
861     }
862
863     if (in->name) {
864         AVFormatContext *s;
865         AVStream       *st = NULL;
866         char *p;
867         int file_idx = strtol(in->name, &p, 0);
868
869         if (file_idx < 0 || file_idx >= nb_input_files) {
870             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
871                    file_idx, fg->graph_desc);
872             exit_program(1);
873         }
874         s = input_files[file_idx]->ctx;
875
876         for (i = 0; i < s->nb_streams; i++) {
877             if (s->streams[i]->codec->codec_type != type)
878                 continue;
879             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
880                 st = s->streams[i];
881                 break;
882             }
883         }
884         if (!st) {
885             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
886                    "matches no streams.\n", p, fg->graph_desc);
887             exit_program(1);
888         }
889         ist = input_streams[input_files[file_idx]->ist_index + st->index];
890     } else {
891         /* find the first unused stream of corresponding type */
892         for (i = 0; i < nb_input_streams; i++) {
893             ist = input_streams[i];
894             if (ist->st->codec->codec_type == type && ist->discard)
895                 break;
896         }
897         if (i == nb_input_streams) {
898             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
899                    "unlabeled input pad %d on filter %s", in->pad_idx,
900                    in->filter_ctx->name);
901             exit_program(1);
902         }
903     }
904     ist->discard         = 0;
905     ist->decoding_needed = 1;
906     ist->st->discard = AVDISCARD_NONE;
907
908     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
909                             &fg->nb_inputs, fg->nb_inputs + 1);
910     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
911         exit_program(1);
912     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
913     fg->inputs[fg->nb_inputs - 1]->graph = fg;
914
915     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
916                               &ist->nb_filters, ist->nb_filters + 1);
917     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
918 }
919
920 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
921 {
922     AVCodecContext *codec = ofilter->ost->st->codec;
923     AVFilterContext *last_filter = out->filter_ctx;
924     int pad_idx = out->pad_idx;
925     int ret;
926     enum PixelFormat *pix_fmts = choose_pixel_fmts(ofilter->ost);
927     AVBufferSinkParams *buffersink_params = av_buffersink_params_alloc();
928
929 #if FF_API_OLD_VSINK_API
930     ret = avfilter_graph_create_filter(&ofilter->filter, avfilter_get_by_name("buffersink"),
931                                        "out", NULL, pix_fmts, fg->graph);
932 #else
933     buffersink_params->pixel_fmts = pix_fmts;
934     ret = avfilter_graph_create_filter(&ofilter->filter, avfilter_get_by_name("buffersink"),
935                                        "out", NULL, buffersink_params, fg->graph);
936 #endif
937     av_freep(&buffersink_params);
938
939     if (ret < 0)
940         return ret;
941
942     if (codec->width || codec->height) {
943         char args[255];
944         snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
945                  codec->width,
946                  codec->height,
947                  (unsigned)ofilter->ost->sws_flags);
948         if ((ret = avfilter_graph_create_filter(&last_filter, avfilter_get_by_name("scale"),
949                                                 NULL, args, NULL, fg->graph)) < 0)
950             return ret;
951         if ((ret = avfilter_link(out->filter_ctx, out->pad_idx, last_filter, 0)) < 0)
952             return ret;
953         pad_idx = 0;
954     }
955
956     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
957         return ret;
958
959     return 0;
960 }
961
962 static int configure_complex_filter(FilterGraph *fg)
963 {
964     AVFilterInOut *inputs, *outputs, *cur;
965     int ret, i, init = !fg->graph;
966
967     avfilter_graph_free(&fg->graph);
968     if (!(fg->graph = avfilter_graph_alloc()))
969         return AVERROR(ENOMEM);
970
971     if ((ret = avfilter_graph_parse2(fg->graph, fg->graph_desc, &inputs, &outputs)) < 0)
972         return ret;
973
974     for (cur = inputs; init && cur; cur = cur->next)
975         init_input_filter(fg, cur);
976
977     for (cur = inputs, i = 0; cur; cur = cur->next, i++) {
978         InputFilter *ifilter = fg->inputs[i];
979         InputStream     *ist = ifilter->ist;
980         AVRational       sar;
981         char            args[255];
982
983         sar = ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
984                                                  ist->st->codec->sample_aspect_ratio;
985         snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
986                  ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
987                  sar.num, sar.den);
988
989         if ((ret = avfilter_graph_create_filter(&ifilter->filter,
990                                                 avfilter_get_by_name("buffer"), cur->name,
991                                                 args, NULL, fg->graph)) < 0)
992             return ret;
993         if ((ret = avfilter_link(ifilter->filter, 0,
994                                  cur->filter_ctx, cur->pad_idx)) < 0)
995             return ret;
996     }
997     avfilter_inout_free(&inputs);
998
999     if (!init) {
1000         /* we already know the mappings between lavfi outputs and output streams,
1001          * so we can finish the setup */
1002         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1003             configure_output_filter(fg, fg->outputs[i], cur);
1004         avfilter_inout_free(&outputs);
1005
1006         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1007             return ret;
1008     } else {
1009         /* wait until output mappings are processed */
1010         for (cur = outputs; cur;) {
1011             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
1012                                      &fg->nb_outputs, fg->nb_outputs + 1);
1013             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
1014                 exit_program(1);
1015             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
1016             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
1017             cur = cur->next;
1018             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
1019         }
1020     }
1021
1022     return 0;
1023 }
1024
1025 static int configure_complex_filters(void)
1026 {
1027     int i, ret = 0;
1028
1029     for (i = 0; i < nb_filtergraphs; i++)
1030         if (!filtergraphs[i]->graph &&
1031             (ret = configure_complex_filter(filtergraphs[i])) < 0)
1032             return ret;
1033     return 0;
1034 }
1035
1036 static int configure_filtergraph(FilterGraph *fg)
1037 {
1038     return fg->graph_desc ? configure_complex_filter(fg) : configure_video_filters(fg);
1039 }
1040
1041 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1042 {
1043     int i;
1044     for (i = 0; i < fg->nb_inputs; i++)
1045         if (fg->inputs[i]->ist == ist)
1046             return 1;
1047     return 0;
1048 }
1049
1050 static void term_exit(void)
1051 {
1052     av_log(NULL, AV_LOG_QUIET, "%s", "");
1053 #if HAVE_TERMIOS_H
1054     if(restore_tty)
1055         tcsetattr (0, TCSANOW, &oldtty);
1056 #endif
1057 }
1058
1059 static volatile int received_sigterm = 0;
1060
1061 static void sigterm_handler(int sig)
1062 {
1063     received_sigterm = sig;
1064     received_nb_signals++;
1065     term_exit();
1066     if(received_nb_signals > 3)
1067         exit(123);
1068 }
1069
1070 static void term_init(void)
1071 {
1072 #if HAVE_TERMIOS_H
1073     if(!run_as_daemon){
1074     struct termios tty;
1075
1076     if (tcgetattr (0, &tty) == 0) {
1077     oldtty = tty;
1078     restore_tty = 1;
1079     atexit(term_exit);
1080
1081     tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1082                           |INLCR|IGNCR|ICRNL|IXON);
1083     tty.c_oflag |= OPOST;
1084     tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1085     tty.c_cflag &= ~(CSIZE|PARENB);
1086     tty.c_cflag |= CS8;
1087     tty.c_cc[VMIN] = 1;
1088     tty.c_cc[VTIME] = 0;
1089
1090     tcsetattr (0, TCSANOW, &tty);
1091     }
1092     signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
1093     }
1094 #endif
1095     avformat_network_deinit();
1096
1097     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1098     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1099 #ifdef SIGXCPU
1100     signal(SIGXCPU, sigterm_handler);
1101 #endif
1102 }
1103
1104 /* read a key without blocking */
1105 static int read_key(void)
1106 {
1107     unsigned char ch;
1108 #if HAVE_TERMIOS_H
1109     int n = 1;
1110     struct timeval tv;
1111     fd_set rfds;
1112
1113     FD_ZERO(&rfds);
1114     FD_SET(0, &rfds);
1115     tv.tv_sec = 0;
1116     tv.tv_usec = 0;
1117     n = select(1, &rfds, NULL, NULL, &tv);
1118     if (n > 0) {
1119         n = read(0, &ch, 1);
1120         if (n == 1)
1121             return ch;
1122
1123         return n;
1124     }
1125 #elif HAVE_KBHIT
1126 #    if HAVE_PEEKNAMEDPIPE
1127     static int is_pipe;
1128     static HANDLE input_handle;
1129     DWORD dw, nchars;
1130     if(!input_handle){
1131         input_handle = GetStdHandle(STD_INPUT_HANDLE);
1132         is_pipe = !GetConsoleMode(input_handle, &dw);
1133     }
1134
1135     if (stdin->_cnt > 0) {
1136         read(0, &ch, 1);
1137         return ch;
1138     }
1139     if (is_pipe) {
1140         /* When running under a GUI, you will end here. */
1141         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL))
1142             return -1;
1143         //Read it
1144         if(nchars != 0) {
1145             read(0, &ch, 1);
1146             return ch;
1147         }else{
1148             return -1;
1149         }
1150     }
1151 #    endif
1152     if(kbhit())
1153         return(getch());
1154 #endif
1155     return -1;
1156 }
1157
1158 static int decode_interrupt_cb(void *ctx)
1159 {
1160     return received_nb_signals > 1;
1161 }
1162
1163 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1164
1165 void av_noreturn exit_program(int ret)
1166 {
1167     int i, j;
1168
1169     for (i = 0; i < nb_filtergraphs; i++) {
1170         avfilter_graph_free(&filtergraphs[i]->graph);
1171         for (j = 0; j < filtergraphs[i]->nb_inputs; j++)
1172             av_freep(&filtergraphs[i]->inputs[j]);
1173         av_freep(&filtergraphs[i]->inputs);
1174         for (j = 0; j < filtergraphs[i]->nb_outputs; j++)
1175             av_freep(&filtergraphs[i]->outputs[j]);
1176         av_freep(&filtergraphs[i]->outputs);
1177         av_freep(&filtergraphs[i]);
1178     }
1179     av_freep(&filtergraphs);
1180
1181     /* close files */
1182     for (i = 0; i < nb_output_files; i++) {
1183         AVFormatContext *s = output_files[i]->ctx;
1184         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1185             avio_close(s->pb);
1186         avformat_free_context(s);
1187         av_dict_free(&output_files[i]->opts);
1188         av_freep(&output_files[i]);
1189     }
1190     for (i = 0; i < nb_output_streams; i++) {
1191         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1192         while (bsfc) {
1193             AVBitStreamFilterContext *next = bsfc->next;
1194             av_bitstream_filter_close(bsfc);
1195             bsfc = next;
1196         }
1197         output_streams[i]->bitstream_filters = NULL;
1198
1199         if (output_streams[i]->output_frame) {
1200             AVFrame *frame = output_streams[i]->output_frame;
1201             if (frame->extended_data != frame->data)
1202                 av_freep(&frame->extended_data);
1203             av_freep(&frame);
1204         }
1205         av_freep(&output_streams[i]->filtered_frame);
1206         av_freep(&output_streams[i]);
1207     }
1208     for (i = 0; i < nb_input_files; i++) {
1209         avformat_close_input(&input_files[i]->ctx);
1210         av_freep(&input_files[i]);
1211     }
1212     for (i = 0; i < nb_input_streams; i++) {
1213         av_freep(&input_streams[i]->decoded_frame);
1214         av_dict_free(&input_streams[i]->opts);
1215         free_buffer_pool(input_streams[i]);
1216         av_freep(&input_streams[i]->filters);
1217         av_freep(&input_streams[i]);
1218     }
1219
1220     if (vstats_file)
1221         fclose(vstats_file);
1222     av_free(vstats_filename);
1223
1224     av_freep(&input_streams);
1225     av_freep(&input_files);
1226     av_freep(&output_streams);
1227     av_freep(&output_files);
1228
1229     uninit_opts();
1230     av_freep(&audio_buf);
1231     allocated_audio_buf_size = 0;
1232     av_freep(&async_buf);
1233     allocated_async_buf_size = 0;
1234
1235     avfilter_uninit();
1236     avformat_network_deinit();
1237
1238     if (received_sigterm) {
1239         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1240                (int) received_sigterm);
1241         exit (255);
1242     }
1243
1244     exit(ret); /* not all OS-es handle main() return value */
1245 }
1246
1247 static void assert_avoptions(AVDictionary *m)
1248 {
1249     AVDictionaryEntry *t;
1250     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1251         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1252         exit_program(1);
1253     }
1254 }
1255
1256 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1257 {
1258     const char *codec_string = encoder ? "encoder" : "decoder";
1259     AVCodec *codec;
1260     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1261         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1262         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1263                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1264                 codec_string, c->codec->name);
1265         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1266         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1267             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1268                    codec_string, codec->name);
1269         exit_program(1);
1270     }
1271 }
1272
1273 static void choose_sample_fmt(AVStream *st, AVCodec *codec)
1274 {
1275     if (codec && codec->sample_fmts) {
1276         const enum AVSampleFormat *p = codec->sample_fmts;
1277         for (; *p != -1; p++) {
1278             if (*p == st->codec->sample_fmt)
1279                 break;
1280         }
1281         if (*p == -1) {
1282             if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
1283                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
1284             if(av_get_sample_fmt_name(st->codec->sample_fmt))
1285             av_log(NULL, AV_LOG_WARNING,
1286                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
1287                    av_get_sample_fmt_name(st->codec->sample_fmt),
1288                    codec->name,
1289                    av_get_sample_fmt_name(codec->sample_fmts[0]));
1290             st->codec->sample_fmt = codec->sample_fmts[0];
1291         }
1292     }
1293 }
1294
1295 static void choose_sample_rate(AVStream *st, AVCodec *codec)
1296 {
1297     if (codec && codec->supported_samplerates) {
1298         const int *p  = codec->supported_samplerates;
1299         int best      = 0;
1300         int best_dist = INT_MAX;
1301         for (; *p; p++) {
1302             int dist = abs(st->codec->sample_rate - *p);
1303             if (dist < best_dist) {
1304                 best_dist = dist;
1305                 best      = *p;
1306             }
1307         }
1308         if (best_dist) {
1309             int i;
1310             const int *sample_rates = codec->supported_samplerates;
1311             av_log(st->codec, AV_LOG_WARNING,
1312                    "Requested sampling rate (%dHz) unsupported, using %dHz instead\n"
1313                    "Available sampling rates for %s:",
1314                    st->codec->sample_rate, best, codec->name);
1315             for (i = 0; sample_rates[i]; i++) {
1316                 if (!sample_rates[i + 1]) av_log(st->codec, AV_LOG_WARNING, " and");
1317                 else if (i)               av_log(st->codec, AV_LOG_WARNING, ",");
1318                 av_log(st->codec, AV_LOG_WARNING, " %d", sample_rates[i]);
1319             }
1320             av_log(st->codec, AV_LOG_WARNING, ".\n");
1321         }
1322         st->codec->sample_rate = best;
1323     }
1324 }
1325
1326 static double
1327 get_sync_ipts(const OutputStream *ost, int64_t pts)
1328 {
1329     OutputFile *of = output_files[ost->file_index];
1330     return (double)(pts - of->start_time) / AV_TIME_BASE;
1331 }
1332
1333 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1334 {
1335     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1336     AVCodecContext          *avctx = ost->st->codec;
1337     int ret;
1338
1339     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
1340         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
1341         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1342
1343     /*
1344      * Audio encoders may split the packets --  #frames in != #packets out.
1345      * But there is no reordering, so we can limit the number of output packets
1346      * by simply dropping them here.
1347      * Counting encoded video frames needs to be done separately because of
1348      * reordering, see do_video_out()
1349      */
1350     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1351         if (ost->frame_number >= ost->max_frames) {
1352             av_free_packet(pkt);
1353             return;
1354         }
1355         ost->frame_number++;
1356     }
1357
1358     while (bsfc) {
1359         AVPacket new_pkt = *pkt;
1360         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1361                                            &new_pkt.data, &new_pkt.size,
1362                                            pkt->data, pkt->size,
1363                                            pkt->flags & AV_PKT_FLAG_KEY);
1364         if (a > 0) {
1365             av_free_packet(pkt);
1366             new_pkt.destruct = av_destruct_packet;
1367         } else if (a < 0) {
1368             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
1369                    bsfc->filter->name, pkt->stream_index,
1370                    avctx->codec ? avctx->codec->name : "copy");
1371             print_error("", a);
1372             if (exit_on_error)
1373                 exit_program(1);
1374         }
1375         *pkt = new_pkt;
1376
1377         bsfc = bsfc->next;
1378     }
1379
1380     pkt->stream_index = ost->index;
1381     ret = av_interleaved_write_frame(s, pkt);
1382     if (ret < 0) {
1383         print_error("av_interleaved_write_frame()", ret);
1384         exit_program(1);
1385     }
1386 }
1387
1388 static void get_default_channel_layouts(OutputStream *ost, InputStream *ist)
1389 {
1390     char layout_name[256];
1391     AVCodecContext *enc = ost->st->codec;
1392     AVCodecContext *dec = ist->st->codec;
1393
1394     if (dec->channel_layout &&
1395         av_get_channel_layout_nb_channels(dec->channel_layout) != dec->channels) {
1396         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1397                                      dec->channels, dec->channel_layout);
1398         av_log(NULL, AV_LOG_ERROR, "New channel layout (%s) is invalid\n",
1399                layout_name);
1400         dec->channel_layout = 0;
1401     }
1402     if (!dec->channel_layout) {
1403         if (enc->channel_layout && dec->channels == enc->channels) {
1404             dec->channel_layout = enc->channel_layout;
1405         } else {
1406             dec->channel_layout = av_get_default_channel_layout(dec->channels);
1407
1408             if (!dec->channel_layout) {
1409                 av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1410                        "layout for Input Stream #%d.%d\n", ist->file_index,
1411                        ist->st->index);
1412                 exit_program(1);
1413             }
1414         }
1415         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1416                                      dec->channels, dec->channel_layout);
1417         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1418                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1419     }
1420     if (!enc->channel_layout) {
1421         if (dec->channels == enc->channels) {
1422             enc->channel_layout = dec->channel_layout;
1423             return;
1424         } else {
1425             enc->channel_layout = av_get_default_channel_layout(enc->channels);
1426         }
1427         if (!enc->channel_layout) {
1428             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel layout "
1429                    "for Output Stream #%d.%d\n", ost->file_index,
1430                    ost->st->index);
1431             exit_program(1);
1432         }
1433         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1434                                      enc->channels, enc->channel_layout);
1435         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for Output Stream "
1436                "#%d.%d : %s\n", ost->file_index, ost->st->index, layout_name);
1437     }
1438 }
1439
1440 static void generate_silence(uint8_t* buf, enum AVSampleFormat sample_fmt, size_t size)
1441 {
1442     int fill_char = 0x00;
1443     if (sample_fmt == AV_SAMPLE_FMT_U8)
1444         fill_char = 0x80;
1445     memset(buf, fill_char, size);
1446 }
1447
1448 static int encode_audio_frame(AVFormatContext *s, OutputStream *ost,
1449                               const uint8_t *buf, int buf_size)
1450 {
1451     AVCodecContext *enc = ost->st->codec;
1452     AVFrame *frame = NULL;
1453     AVPacket pkt;
1454     int ret, got_packet;
1455
1456     av_init_packet(&pkt);
1457     pkt.data = NULL;
1458     pkt.size = 0;
1459
1460     if (buf && buf_size) {
1461         if (!ost->output_frame) {
1462             ost->output_frame = avcodec_alloc_frame();
1463             if (!ost->output_frame) {
1464                 av_log(NULL, AV_LOG_FATAL, "out-of-memory in encode_audio_frame()\n");
1465                 exit_program(1);
1466             }
1467         }
1468         frame = ost->output_frame;
1469         if (frame->extended_data != frame->data)
1470             av_freep(&frame->extended_data);
1471         avcodec_get_frame_defaults(frame);
1472
1473         frame->nb_samples  = buf_size /
1474                              (enc->channels * av_get_bytes_per_sample(enc->sample_fmt));
1475         if ((ret = avcodec_fill_audio_frame(frame, enc->channels, enc->sample_fmt,
1476                                             buf, buf_size, 1)) < 0) {
1477             av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_fill_audio_frame)\n");
1478             exit_program(1);
1479         }
1480
1481         frame->pts = ost->sync_opts;
1482         ost->sync_opts += frame->nb_samples;
1483     }
1484
1485     got_packet = 0;
1486     update_benchmark(NULL);
1487     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1488         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
1489         exit_program(1);
1490     }
1491     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
1492
1493     ret = pkt.size;
1494
1495     if (got_packet) {
1496         if (pkt.pts != AV_NOPTS_VALUE)
1497             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1498         if (pkt.dts != AV_NOPTS_VALUE) {
1499             int64_t max = ost->st->cur_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
1500             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1501             if (ost->st->cur_dts && ost->st->cur_dts != AV_NOPTS_VALUE &&  max > pkt.dts) {
1502                 av_log(s, max - pkt.dts > 2 ? AV_LOG_WARNING : AV_LOG_DEBUG, "Audio timestamp %"PRId64" < %"PRId64" invalid, cliping\n", pkt.dts, max);
1503                 pkt.pts = pkt.dts = max;
1504             }
1505         }
1506         if (pkt.duration > 0)
1507             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1508
1509         write_frame(s, &pkt, ost);
1510
1511         audio_size += pkt.size;
1512
1513         av_free_packet(&pkt);
1514     }
1515
1516     if (debug_ts) {
1517         av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
1518                "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1519                av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1520                av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1521     }
1522
1523     return ret;
1524 }
1525
1526 static int alloc_audio_output_buf(AVCodecContext *dec, AVCodecContext *enc,
1527                                   int nb_samples)
1528 {
1529     int64_t audio_buf_samples;
1530     int audio_buf_size;
1531
1532     /* calculate required number of samples to allocate */
1533     audio_buf_samples = ((int64_t)nb_samples * enc->sample_rate + dec->sample_rate) /
1534                         dec->sample_rate;
1535     audio_buf_samples = 4 * audio_buf_samples + 10000; // safety factors for resampling
1536     audio_buf_samples = FFMAX(audio_buf_samples, enc->frame_size);
1537     if (audio_buf_samples > INT_MAX)
1538         return AVERROR(EINVAL);
1539
1540     audio_buf_size = av_samples_get_buffer_size(NULL, enc->channels,
1541                                                 audio_buf_samples,
1542                                                 enc->sample_fmt, 0);
1543     if (audio_buf_size < 0)
1544         return audio_buf_size;
1545
1546     av_fast_malloc(&audio_buf, &allocated_audio_buf_size, audio_buf_size);
1547     if (!audio_buf)
1548         return AVERROR(ENOMEM);
1549
1550     return 0;
1551 }
1552
1553 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1554                          InputStream *ist, AVFrame *decoded_frame)
1555 {
1556     uint8_t *buftmp;
1557     int64_t size_out;
1558
1559     int frame_bytes, resample_changed;
1560     AVCodecContext *enc = ost->st->codec;
1561     AVCodecContext *dec = ist->st->codec;
1562     int osize = av_get_bytes_per_sample(enc->sample_fmt);
1563     int isize = av_get_bytes_per_sample(dec->sample_fmt);
1564     uint8_t *buf[AV_NUM_DATA_POINTERS];
1565     int size     = decoded_frame->nb_samples * dec->channels * isize;
1566     int planes   = av_sample_fmt_is_planar(dec->sample_fmt) ? dec->channels : 1;
1567     int i;
1568
1569     av_assert0(planes <= AV_NUM_DATA_POINTERS);
1570
1571     for(i=0; i<planes; i++)
1572         buf[i]= decoded_frame->data[i];
1573
1574     get_default_channel_layouts(ost, ist);
1575
1576     if (alloc_audio_output_buf(dec, enc, decoded_frame->nb_samples) < 0) {
1577         av_log(NULL, AV_LOG_FATAL, "Error allocating audio buffer\n");
1578         exit_program(1);
1579     }
1580
1581     if (enc->channels != dec->channels
1582      || enc->sample_fmt != dec->sample_fmt
1583      || enc->sample_rate!= dec->sample_rate
1584     )
1585         ost->audio_resample = 1;
1586
1587     resample_changed = ost->resample_sample_fmt  != dec->sample_fmt ||
1588                        ost->resample_channels    != dec->channels   ||
1589                        ost->resample_sample_rate != dec->sample_rate;
1590
1591     if ((ost->audio_resample && !ost->swr) || resample_changed || ost->audio_channels_mapped) {
1592         if (resample_changed) {
1593             av_log(NULL, AV_LOG_INFO, "Input stream #%d:%d frame changed from rate:%d fmt:%s ch:%d to rate:%d fmt:%s ch:%d\n",
1594                    ist->file_index, ist->st->index,
1595                    ost->resample_sample_rate, av_get_sample_fmt_name(ost->resample_sample_fmt), ost->resample_channels,
1596                    dec->sample_rate, av_get_sample_fmt_name(dec->sample_fmt), dec->channels);
1597             ost->resample_sample_fmt  = dec->sample_fmt;
1598             ost->resample_channels    = dec->channels;
1599             ost->resample_sample_rate = dec->sample_rate;
1600             swr_free(&ost->swr);
1601         }
1602         /* if audio_sync_method is >1 the resampler is needed for audio drift compensation */
1603         if (audio_sync_method <= 1 && !ost->audio_channels_mapped &&
1604             ost->resample_sample_fmt  == enc->sample_fmt &&
1605             ost->resample_channels    == enc->channels   &&
1606             ost->resample_sample_rate == enc->sample_rate) {
1607             //ost->swr = NULL;
1608             ost->audio_resample = 0;
1609         } else {
1610             ost->swr = swr_alloc_set_opts(ost->swr,
1611                                           enc->channel_layout, enc->sample_fmt, enc->sample_rate,
1612                                           dec->channel_layout, dec->sample_fmt, dec->sample_rate,
1613                                           0, NULL);
1614             av_opt_set_int(ost->swr, "dither_method", ost->swr_dither_method,0);
1615             av_opt_set_int(ost->swr, "dither_scale", ost->swr_dither_scale,0);
1616             if (ost->audio_channels_mapped)
1617                 swr_set_channel_mapping(ost->swr, ost->audio_channels_map);
1618             av_opt_set_double(ost->swr, "rmvol", ost->rematrix_volume, 0);
1619             if (ost->audio_channels_mapped) {
1620                 av_opt_set_int(ost->swr, "icl", av_get_default_channel_layout(ost->audio_channels_mapped), 0);
1621                 av_opt_set_int(ost->swr, "uch", ost->audio_channels_mapped, 0);
1622             }
1623             if (av_opt_set_int(ost->swr, "ich", dec->channels, 0) < 0) {
1624                 av_log(NULL, AV_LOG_FATAL, "Unsupported number of input channels\n");
1625                 exit_program(1);
1626             }
1627             if (av_opt_set_int(ost->swr, "och", enc->channels, 0) < 0) {
1628                 av_log(NULL, AV_LOG_FATAL, "Unsupported number of output channels\n");
1629                 exit_program(1);
1630             }
1631             if(audio_sync_method>1) av_opt_set_int(ost->swr, "flags", SWR_FLAG_RESAMPLE, 0);
1632             if(ost->swr && swr_init(ost->swr) < 0){
1633                 av_log(NULL, AV_LOG_FATAL, "swr_init() failed\n");
1634                 swr_free(&ost->swr);
1635             }
1636
1637             if (!ost->swr) {
1638                 av_log(NULL, AV_LOG_FATAL, "Can not resample %d channels @ %d Hz to %d channels @ %d Hz\n",
1639                         dec->channels, dec->sample_rate,
1640                         enc->channels, enc->sample_rate);
1641                 exit_program(1);
1642             }
1643         }
1644     }
1645
1646     av_assert0(ost->audio_resample || dec->sample_fmt==enc->sample_fmt);
1647
1648     if (audio_sync_method > 0) {
1649         double delta = get_sync_ipts(ost, ist->pts) * enc->sample_rate - ost->sync_opts -
1650                        av_fifo_size(ost->fifo) / (enc->channels * osize);
1651         int idelta = delta * dec->sample_rate / enc->sample_rate;
1652         int byte_delta = idelta * isize * dec->channels;
1653
1654         // FIXME resample delay
1655         if (fabs(delta) > 50) {
1656             if (ist->is_start || fabs(delta) > audio_drift_threshold*enc->sample_rate) {
1657                 if (byte_delta < 0) {
1658                     byte_delta = FFMAX(byte_delta, -size);
1659                     size += byte_delta;
1660                     for (i=0; i<planes; i++)
1661                         buf[i]  -= byte_delta/planes;
1662                     av_log(NULL, AV_LOG_VERBOSE, "discarding %d audio samples\n",
1663                            -byte_delta / (isize * dec->channels));
1664                     if (!size)
1665                         return;
1666                     ist->is_start = 0;
1667                 } else {
1668                     av_fast_malloc(&async_buf, &allocated_async_buf_size,
1669                                    byte_delta + size);
1670                     if (!async_buf) {
1671                         av_log(NULL, AV_LOG_FATAL, "Out of memory in do_audio_out\n");
1672                         exit_program(1);
1673                     }
1674
1675                     if (alloc_audio_output_buf(dec, enc, decoded_frame->nb_samples + idelta) < 0) {
1676                         av_log(NULL, AV_LOG_FATAL, "Error allocating audio buffer\n");
1677                         exit_program(1);
1678                     }
1679                     ist->is_start = 0;
1680
1681                     for (i=0; i<planes; i++) {
1682                         uint8_t *t = async_buf + i*((byte_delta + size)/planes);
1683                         generate_silence(t, dec->sample_fmt, byte_delta/planes);
1684                         memcpy(t + byte_delta/planes, buf[i], size/planes);
1685                         buf[i] = t;
1686                     }
1687                     size += byte_delta;
1688                     av_log(NULL, AV_LOG_VERBOSE, "adding %d audio samples of silence\n", idelta);
1689                 }
1690             } else if (audio_sync_method > 1) {
1691                 int comp = av_clip(delta, -audio_sync_method, audio_sync_method);
1692                 av_assert0(ost->audio_resample);
1693                 av_log(NULL, AV_LOG_VERBOSE, "compensating audio timestamp drift:%f compensation:%d in:%d\n",
1694                        delta, comp, enc->sample_rate);
1695 //                fprintf(stderr, "drift:%f len:%d opts:%"PRId64" ipts:%"PRId64" fifo:%d\n", delta, -1, ost->sync_opts, (int64_t)(get_sync_ipts(ost) * enc->sample_rate), av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2));
1696                 swr_set_compensation(ost->swr, comp, enc->sample_rate);
1697             }
1698         }
1699     } else if (audio_sync_method == 0)
1700         ost->sync_opts = lrintf(get_sync_ipts(ost, ist->pts) * enc->sample_rate) -
1701                                 av_fifo_size(ost->fifo) / (enc->channels * osize); // FIXME wrong
1702
1703     if (ost->audio_resample || ost->audio_channels_mapped) {
1704         buftmp = audio_buf;
1705         size_out = swr_convert(ost->swr, (      uint8_t*[]){buftmp}, allocated_audio_buf_size / (enc->channels * osize),
1706                                          buf, size / (dec->channels * isize));
1707         if (size_out < 0) {
1708             av_log(NULL, AV_LOG_FATAL, "swr_convert failed\n");
1709             exit_program(1);
1710         }
1711         size_out = size_out * enc->channels * osize;
1712     } else {
1713         buftmp = buf[0];
1714         size_out = size;
1715     }
1716
1717     av_assert0(ost->audio_resample || dec->sample_fmt==enc->sample_fmt);
1718
1719     /* now encode as many frames as possible */
1720     if (!(enc->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
1721         /* output resampled raw samples */
1722         if (av_fifo_realloc2(ost->fifo, av_fifo_size(ost->fifo) + size_out) < 0) {
1723             av_log(NULL, AV_LOG_FATAL, "av_fifo_realloc2() failed\n");
1724             exit_program(1);
1725         }
1726         av_fifo_generic_write(ost->fifo, buftmp, size_out, NULL);
1727
1728         frame_bytes = enc->frame_size * osize * enc->channels;
1729
1730         while (av_fifo_size(ost->fifo) >= frame_bytes) {
1731             av_fifo_generic_read(ost->fifo, audio_buf, frame_bytes, NULL);
1732             encode_audio_frame(s, ost, audio_buf, frame_bytes);
1733         }
1734     } else {
1735         encode_audio_frame(s, ost, buftmp, size_out);
1736     }
1737 }
1738
1739 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1740 {
1741     AVCodecContext *dec;
1742     AVPicture *picture2;
1743     AVPicture picture_tmp;
1744     uint8_t *buf = 0;
1745
1746     dec = ist->st->codec;
1747
1748     /* deinterlace : must be done before any resize */
1749     if (do_deinterlace) {
1750         int size;
1751
1752         /* create temporary picture */
1753         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1754         buf  = av_malloc(size);
1755         if (!buf)
1756             return;
1757
1758         picture2 = &picture_tmp;
1759         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1760
1761         if (avpicture_deinterlace(picture2, picture,
1762                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1763             /* if error, do not deinterlace */
1764             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1765             av_free(buf);
1766             buf = NULL;
1767             picture2 = picture;
1768         }
1769     } else {
1770         picture2 = picture;
1771     }
1772
1773     if (picture != picture2)
1774         *picture = *picture2;
1775     *bufp = buf;
1776 }
1777
1778 static void do_subtitle_out(AVFormatContext *s,
1779                             OutputStream *ost,
1780                             InputStream *ist,
1781                             AVSubtitle *sub,
1782                             int64_t pts)
1783 {
1784     static uint8_t *subtitle_out = NULL;
1785     int subtitle_out_max_size = 1024 * 1024;
1786     int subtitle_out_size, nb, i;
1787     AVCodecContext *enc;
1788     AVPacket pkt;
1789
1790     if (pts == AV_NOPTS_VALUE) {
1791         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1792         if (exit_on_error)
1793             exit_program(1);
1794         return;
1795     }
1796
1797     enc = ost->st->codec;
1798
1799     if (!subtitle_out) {
1800         subtitle_out = av_malloc(subtitle_out_max_size);
1801     }
1802
1803     /* Note: DVB subtitle need one packet to draw them and one other
1804        packet to clear them */
1805     /* XXX: signal it in the codec context ? */
1806     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1807         nb = 2;
1808     else
1809         nb = 1;
1810
1811     for (i = 0; i < nb; i++) {
1812         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1813
1814         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1815         // start_display_time is required to be 0
1816         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1817         sub->end_display_time  -= sub->start_display_time;
1818         sub->start_display_time = 0;
1819         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1820                                                     subtitle_out_max_size, sub);
1821         if (subtitle_out_size < 0) {
1822             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1823             exit_program(1);
1824         }
1825
1826         av_init_packet(&pkt);
1827         pkt.data = subtitle_out;
1828         pkt.size = subtitle_out_size;
1829         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1830         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1831             /* XXX: the pts correction is handled here. Maybe handling
1832                it in the codec would be better */
1833             if (i == 0)
1834                 pkt.pts += 90 * sub->start_display_time;
1835             else
1836                 pkt.pts += 90 * sub->end_display_time;
1837         }
1838         write_frame(s, &pkt, ost);
1839     }
1840 }
1841
1842 static double psnr(double d)
1843 {
1844     return -10.0 * log(d) / log(10.0);
1845 }
1846
1847 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1848                            int frame_size)
1849 {
1850     AVCodecContext *enc;
1851     int frame_number;
1852     double ti1, bitrate, avg_bitrate;
1853
1854     /* this is executed just the first time do_video_stats is called */
1855     if (!vstats_file) {
1856         vstats_file = fopen(vstats_filename, "w");
1857         if (!vstats_file) {
1858             perror("fopen");
1859             exit_program(1);
1860         }
1861     }
1862
1863     enc = ost->st->codec;
1864     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1865         frame_number = ost->frame_number;
1866         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1867         if (enc->flags&CODEC_FLAG_PSNR)
1868             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1869
1870         fprintf(vstats_file,"f_size= %6d ", frame_size);
1871         /* compute pts value */
1872         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1873         if (ti1 < 0.01)
1874             ti1 = 0.01;
1875
1876         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1877         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1878         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1879                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1880         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1881     }
1882 }
1883
1884
1885 static void do_video_out(AVFormatContext *s, OutputStream *ost,
1886                          AVFrame *in_picture, float quality)
1887 {
1888     int nb_frames, i, ret, format_video_sync;
1889     AVCodecContext *enc;
1890     double sync_ipts, delta;
1891     double duration = 0;
1892     int frame_size = 0;
1893     InputStream *ist = NULL;
1894
1895     if (ost->source_index >= 0)
1896         ist = input_streams[ost->source_index];
1897
1898     enc = ost->st->codec;
1899
1900     if (ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE) {
1901         duration = FFMAX(av_q2d(ist->st->time_base), av_q2d(ist->st->codec->time_base));
1902         if(ist->st->r_frame_rate.num)
1903             duration= FFMAX(duration, 1/av_q2d(ist->st->r_frame_rate));
1904         if(ist->st->avg_frame_rate.num && 0)
1905             duration= FFMAX(duration, 1/av_q2d(ist->st->avg_frame_rate));
1906
1907         duration /= av_q2d(enc->time_base);
1908     }
1909
1910     sync_ipts = get_sync_ipts(ost, in_picture->pts) / av_q2d(enc->time_base);
1911     delta = sync_ipts - ost->sync_opts + duration;
1912
1913     /* by default, we output a single frame */
1914     nb_frames = 1;
1915
1916     format_video_sync = video_sync_method;
1917     if (format_video_sync == VSYNC_AUTO)
1918         format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : 1;
1919
1920     switch (format_video_sync) {
1921     case VSYNC_CFR:
1922         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
1923         if (delta < -1.1)
1924             nb_frames = 0;
1925         else if (delta > 1.1)
1926             nb_frames = lrintf(delta);
1927         break;
1928     case VSYNC_VFR:
1929         if (delta <= -0.6)
1930             nb_frames = 0;
1931         else if (delta > 0.6)
1932             ost->sync_opts = lrintf(sync_ipts);
1933         break;
1934     case VSYNC_DROP:
1935     case VSYNC_PASSTHROUGH:
1936         ost->sync_opts = lrintf(sync_ipts);
1937         break;
1938     default:
1939         av_assert0(0);
1940     }
1941
1942     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
1943     if (nb_frames == 0) {
1944         nb_frames_drop++;
1945         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1946         return;
1947     } else if (nb_frames > 1) {
1948         nb_frames_dup += nb_frames - 1;
1949         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
1950     }
1951
1952     /* duplicates frame if needed */
1953     for (i = 0; i < nb_frames; i++) {
1954         AVPacket pkt;
1955         av_init_packet(&pkt);
1956         pkt.data = NULL;
1957         pkt.size = 0;
1958
1959         if (s->oformat->flags & AVFMT_RAWPICTURE &&
1960             enc->codec->id == CODEC_ID_RAWVIDEO) {
1961             /* raw pictures are written as AVPicture structure to
1962                avoid any copies. We support temporarily the older
1963                method. */
1964             enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1965             enc->coded_frame->top_field_first  = in_picture->top_field_first;
1966             pkt.data   = (uint8_t *)in_picture;
1967             pkt.size   =  sizeof(AVPicture);
1968             pkt.pts    = av_rescale_q(ost->sync_opts, enc->time_base, ost->st->time_base);
1969             pkt.flags |= AV_PKT_FLAG_KEY;
1970
1971             write_frame(s, &pkt, ost);
1972         } else {
1973             int got_packet;
1974             AVFrame big_picture;
1975
1976             big_picture = *in_picture;
1977             /* better than nothing: use input picture interlaced
1978                settings */
1979             big_picture.interlaced_frame = in_picture->interlaced_frame;
1980             if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1981                 if (ost->top_field_first == -1)
1982                     big_picture.top_field_first = in_picture->top_field_first;
1983                 else
1984                     big_picture.top_field_first = !!ost->top_field_first;
1985             }
1986
1987             /* handles same_quant here. This is not correct because it may
1988                not be a global option */
1989             big_picture.quality = quality;
1990             if (!enc->me_threshold)
1991                 big_picture.pict_type = 0;
1992             big_picture.pts = ost->sync_opts;
1993             if (ost->forced_kf_index < ost->forced_kf_count &&
1994                 big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1995                 big_picture.pict_type = AV_PICTURE_TYPE_I;
1996                 ost->forced_kf_index++;
1997             }
1998             update_benchmark(NULL);
1999             ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
2000             update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
2001             if (ret < 0) {
2002                 av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
2003                 exit_program(1);
2004             }
2005
2006             if (got_packet) {
2007                 if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
2008                     pkt.pts = ost->sync_opts;
2009
2010                 if (pkt.pts != AV_NOPTS_VALUE)
2011                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
2012                 if (pkt.dts != AV_NOPTS_VALUE)
2013                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
2014
2015                 if (debug_ts) {
2016                     av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
2017                            "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
2018                            av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
2019                            av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
2020                 }
2021
2022                 write_frame(s, &pkt, ost);
2023                 frame_size = pkt.size;
2024                 video_size += pkt.size;
2025                 av_free_packet(&pkt);
2026
2027                 /* if two pass, output log */
2028                 if (ost->logfile && enc->stats_out) {
2029                     fprintf(ost->logfile, "%s", enc->stats_out);
2030                 }
2031             }
2032         }
2033         ost->sync_opts++;
2034         /*
2035          * For video, number of frames in == number of packets out.
2036          * But there may be reordering, so we can't throw away frames on encoder
2037          * flush, we need to limit them here, before they go into encoder.
2038          */
2039         ost->frame_number++;
2040     }
2041     if (vstats_filename && frame_size)
2042         do_video_stats(output_files[ost->file_index]->ctx, ost, frame_size);
2043 }
2044
2045 /* check for new output on any of the filtergraphs */
2046 static int poll_filters(void)
2047 {
2048     AVFilterBufferRef *picref;
2049     AVFrame *filtered_frame = NULL;
2050     int i, ret, ret_all;
2051     unsigned nb_success, nb_eof;
2052
2053     while (1) {
2054         /* Reap all buffers present in the buffer sinks */
2055         /* TODO reindent */
2056     for (i = 0; i < nb_output_streams; i++) {
2057         OutputStream *ost = output_streams[i];
2058         OutputFile    *of = output_files[ost->file_index];
2059
2060         if (!ost->filter || ost->is_past_recording_time)
2061             continue;
2062
2063         if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
2064             return AVERROR(ENOMEM);
2065         } else
2066             avcodec_get_frame_defaults(ost->filtered_frame);
2067         filtered_frame = ost->filtered_frame;
2068
2069         while (1) {
2070             AVRational ist_pts_tb = ost->filter->filter->inputs[0]->time_base;
2071             ret = av_buffersink_get_buffer_ref(ost->filter->filter, &picref,
2072                                                AV_BUFFERSINK_FLAG_NO_REQUEST);
2073             if (ret < 0) {
2074                 if (ret != AVERROR(EAGAIN)) {
2075                     char buf[256];
2076                     av_strerror(ret, buf, sizeof(buf));
2077                     av_log(NULL, AV_LOG_WARNING,
2078                            "Error in av_buffersink_get_buffer_ref(): %s\n", buf);
2079                 }
2080                 break;
2081             }
2082             filtered_frame->pts = av_rescale_q(picref->pts, ist_pts_tb, AV_TIME_BASE_Q);
2083 //             if (ost->source_index >= 0)
2084 //                 *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
2085
2086             if (of->start_time && filtered_frame->pts < of->start_time)
2087                 return 0;
2088
2089             switch (ost->filter->filter->inputs[0]->type) {
2090             case AVMEDIA_TYPE_VIDEO:
2091                 avfilter_fill_frame_from_video_buffer_ref(filtered_frame, picref);
2092                 if (!ost->frame_aspect_ratio)
2093                     ost->st->codec->sample_aspect_ratio = picref->video->sample_aspect_ratio;
2094
2095                 do_video_out(of->ctx, ost, filtered_frame,
2096                              same_quant ? ost->last_quality :
2097                                           ost->st->codec->global_quality);
2098                 break;
2099             default:
2100                 // TODO support audio/subtitle filters
2101                 av_assert0(0);
2102             }
2103
2104             avfilter_unref_buffer(picref);
2105         }
2106     }
2107         /* Request frames through all the graphs */
2108         ret_all = nb_success = nb_eof = 0;
2109         for (i = 0; i < nb_filtergraphs; i++) {
2110             ret = avfilter_graph_request_oldest(filtergraphs[i]->graph);
2111             if (!ret) {
2112                 nb_success++;
2113             } else if (ret == AVERROR_EOF) {
2114                 nb_eof++;
2115             } else if (ret != AVERROR(EAGAIN)) {
2116                 char buf[256];
2117                 av_strerror(ret, buf, sizeof(buf));
2118                 av_log(NULL, AV_LOG_WARNING,
2119                        "Error in request_frame(): %s\n", buf);
2120                 ret_all = ret;
2121             }
2122         }
2123         if (!nb_success)
2124             break;
2125         /* Try again if anything succeeded */
2126     }
2127     return nb_eof == nb_filtergraphs ? AVERROR_EOF : ret_all;
2128 }
2129
2130 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
2131 {
2132     char buf[1024];
2133     OutputStream *ost;
2134     AVFormatContext *oc;
2135     int64_t total_size;
2136     AVCodecContext *enc;
2137     int frame_number, vid, i;
2138     double bitrate;
2139     int64_t pts = INT64_MAX;
2140     static int64_t last_time = -1;
2141     static int qp_histogram[52];
2142     int hours, mins, secs, us;
2143
2144     if (!print_stats && !is_last_report)
2145         return;
2146
2147     if (!is_last_report) {
2148         if (last_time == -1) {
2149             last_time = cur_time;
2150             return;
2151         }
2152         if ((cur_time - last_time) < 500000)
2153             return;
2154         last_time = cur_time;
2155     }
2156
2157
2158     oc = output_files[0]->ctx;
2159
2160     total_size = avio_size(oc->pb);
2161     if (total_size < 0) { // FIXME improve avio_size() so it works with non seekable output too
2162         total_size = avio_tell(oc->pb);
2163         if (total_size < 0)
2164             total_size = 0;
2165     }
2166
2167     buf[0] = '\0';
2168     vid = 0;
2169     for (i = 0; i < nb_output_streams; i++) {
2170         float q = -1;
2171         ost = output_streams[i];
2172         enc = ost->st->codec;
2173         if (!ost->stream_copy && enc->coded_frame)
2174             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
2175         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2176             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
2177         }
2178         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2179             float fps, t = (cur_time-timer_start) / 1000000.0;
2180
2181             frame_number = ost->frame_number;
2182             fps = t > 1 ? frame_number / t : 0;
2183             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
2184                      frame_number, fps < 9.95, fps, q);
2185             if (is_last_report)
2186                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
2187             if (qp_hist) {
2188                 int j;
2189                 int qp = lrintf(q);
2190                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
2191                     qp_histogram[qp]++;
2192                 for (j = 0; j < 32; j++)
2193                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
2194             }
2195             if (enc->flags&CODEC_FLAG_PSNR) {
2196                 int j;
2197                 double error, error_sum = 0;
2198                 double scale, scale_sum = 0;
2199                 char type[3] = { 'Y','U','V' };
2200                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
2201                 for (j = 0; j < 3; j++) {
2202                     if (is_last_report) {
2203                         error = enc->error[j];
2204                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
2205                     } else {
2206                         error = enc->coded_frame->error[j];
2207                         scale = enc->width * enc->height * 255.0 * 255.0;
2208                     }
2209                     if (j)
2210                         scale /= 4;
2211                     error_sum += error;
2212                     scale_sum += scale;
2213                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
2214                 }
2215                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
2216             }
2217             vid = 1;
2218         }
2219         /* compute min output value */
2220         pts = FFMIN(pts, av_rescale_q(ost->st->pts.val,
2221                                       ost->st->time_base, AV_TIME_BASE_Q));
2222     }
2223
2224     secs = pts / AV_TIME_BASE;
2225     us = pts % AV_TIME_BASE;
2226     mins = secs / 60;
2227     secs %= 60;
2228     hours = mins / 60;
2229     mins %= 60;
2230
2231     bitrate = pts ? total_size * 8 / (pts / 1000.0) : 0;
2232
2233     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2234              "size=%8.0fkB time=", total_size / 1024.0);
2235     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2236              "%02d:%02d:%02d.%02d ", hours, mins, secs,
2237              (100 * us) / AV_TIME_BASE);
2238     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2239              "bitrate=%6.1fkbits/s", bitrate);
2240
2241     if (nb_frames_dup || nb_frames_drop)
2242         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
2243                 nb_frames_dup, nb_frames_drop);
2244
2245     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
2246
2247     fflush(stderr);
2248
2249     if (is_last_report) {
2250         int64_t raw= audio_size + video_size + extra_size;
2251         av_log(NULL, AV_LOG_INFO, "\n");
2252         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
2253                video_size / 1024.0,
2254                audio_size / 1024.0,
2255                extra_size / 1024.0,
2256                100.0 * (total_size - raw) / raw
2257         );
2258         if(video_size + audio_size + extra_size == 0){
2259             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
2260         }
2261     }
2262 }
2263
2264 static void flush_encoders(void)
2265 {
2266     int i, ret;
2267
2268     for (i = 0; i < nb_output_streams; i++) {
2269         OutputStream   *ost = output_streams[i];
2270         AVCodecContext *enc = ost->st->codec;
2271         AVFormatContext *os = output_files[ost->file_index]->ctx;
2272         int stop_encoding = 0;
2273
2274         if (!ost->encoding_needed)
2275             continue;
2276
2277         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
2278             continue;
2279         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
2280             continue;
2281
2282         for (;;) {
2283             AVPacket pkt;
2284             int fifo_bytes, got_packet;
2285             av_init_packet(&pkt);
2286             pkt.data = NULL;
2287             pkt.size = 0;
2288
2289             switch (ost->st->codec->codec_type) {
2290             case AVMEDIA_TYPE_AUDIO:
2291                 fifo_bytes = av_fifo_size(ost->fifo);
2292                 if (fifo_bytes > 0) {
2293                     /* encode any samples remaining in fifo */
2294                     int frame_bytes = fifo_bytes;
2295
2296                     av_fifo_generic_read(ost->fifo, audio_buf, fifo_bytes, NULL);
2297
2298                     /* pad last frame with silence if needed */
2299                     if (!(enc->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME)) {
2300                         frame_bytes = enc->frame_size * enc->channels *
2301                                       av_get_bytes_per_sample(enc->sample_fmt);
2302                         if (allocated_audio_buf_size < frame_bytes)
2303                             exit_program(1);
2304                         generate_silence(audio_buf+fifo_bytes, enc->sample_fmt, frame_bytes - fifo_bytes);
2305                     }
2306                     encode_audio_frame(os, ost, audio_buf, frame_bytes);
2307                 } else {
2308                     /* flush encoder with NULL frames until it is done
2309                        returning packets */
2310                     if (encode_audio_frame(os, ost, NULL, 0) == 0) {
2311                         stop_encoding = 1;
2312                         break;
2313                     }
2314                 }
2315                 break;
2316             case AVMEDIA_TYPE_VIDEO:
2317                 update_benchmark(NULL);
2318                 ret = avcodec_encode_video2(enc, &pkt, NULL, &got_packet);
2319                 update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
2320                 if (ret < 0) {
2321                     av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
2322                     exit_program(1);
2323                 }
2324                 video_size += pkt.size;
2325                 if (ost->logfile && enc->stats_out) {
2326                     fprintf(ost->logfile, "%s", enc->stats_out);
2327                 }
2328                 if (!got_packet) {
2329                     stop_encoding = 1;
2330                     break;
2331                 }
2332                 if (pkt.pts != AV_NOPTS_VALUE)
2333                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
2334                 if (pkt.dts != AV_NOPTS_VALUE)
2335                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
2336                 write_frame(os, &pkt, ost);
2337                 break;
2338             default:
2339                 stop_encoding = 1;
2340             }
2341             if (stop_encoding)
2342                 break;
2343         }
2344     }
2345 }
2346
2347 /*
2348  * Check whether a packet from ist should be written into ost at this time
2349  */
2350 static int check_output_constraints(InputStream *ist, OutputStream *ost)
2351 {
2352     OutputFile *of = output_files[ost->file_index];
2353     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
2354
2355     if (ost->source_index != ist_index)
2356         return 0;
2357
2358     if (of->start_time && ist->pts < of->start_time)
2359         return 0;
2360
2361     if (of->recording_time != INT64_MAX &&
2362         av_compare_ts(ist->pts, AV_TIME_BASE_Q, of->recording_time + of->start_time,
2363                       (AVRational){ 1, 1000000 }) >= 0) {
2364         ost->is_past_recording_time = 1;
2365         return 0;
2366     }
2367
2368     return 1;
2369 }
2370
2371 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
2372 {
2373     OutputFile *of = output_files[ost->file_index];
2374     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
2375     AVPicture pict;
2376     AVPacket opkt;
2377
2378     av_init_packet(&opkt);
2379
2380     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
2381         !ost->copy_initial_nonkeyframes)
2382         return;
2383
2384     /* force the input stream PTS */
2385     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2386         audio_size += pkt->size;
2387     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2388         video_size += pkt->size;
2389         ost->sync_opts++;
2390     }
2391
2392     if (pkt->pts != AV_NOPTS_VALUE)
2393         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
2394     else
2395         opkt.pts = AV_NOPTS_VALUE;
2396
2397     if (pkt->dts == AV_NOPTS_VALUE)
2398         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
2399     else
2400         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
2401     opkt.dts -= ost_tb_start_time;
2402
2403     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
2404     opkt.flags    = pkt->flags;
2405
2406     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
2407     if (  ost->st->codec->codec_id != CODEC_ID_H264
2408        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
2409        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
2410        && ost->st->codec->codec_id != CODEC_ID_VC1
2411        ) {
2412         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
2413             opkt.destruct = av_destruct_packet;
2414     } else {
2415         opkt.data = pkt->data;
2416         opkt.size = pkt->size;
2417     }
2418     if (of->ctx->oformat->flags & AVFMT_RAWPICTURE) {
2419         /* store AVPicture in AVPacket, as expected by the output format */
2420         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
2421         opkt.data = (uint8_t *)&pict;
2422         opkt.size = sizeof(AVPicture);
2423         opkt.flags |= AV_PKT_FLAG_KEY;
2424     }
2425
2426     write_frame(of->ctx, &opkt, ost);
2427     ost->st->codec->frame_number++;
2428     av_free_packet(&opkt);
2429 }
2430
2431 static void rate_emu_sleep(InputStream *ist)
2432 {
2433     if (input_files[ist->file_index]->rate_emu) {
2434         int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
2435         int64_t now = av_gettime() - ist->start;
2436         if (pts > now)
2437             usleep(pts - now);
2438     }
2439 }
2440
2441 static int transcode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
2442 {
2443     AVFrame *decoded_frame;
2444     AVCodecContext *avctx = ist->st->codec;
2445     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
2446     int i, ret;
2447
2448     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2449         return AVERROR(ENOMEM);
2450     else
2451         avcodec_get_frame_defaults(ist->decoded_frame);
2452     decoded_frame = ist->decoded_frame;
2453
2454     update_benchmark(NULL);
2455     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
2456     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
2457     if (ret < 0) {
2458         return ret;
2459     }
2460     if (avctx->sample_rate <= 0) {
2461         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
2462         return AVERROR_INVALIDDATA;
2463     }
2464
2465     if (!*got_output) {
2466         /* no audio frame */
2467         return ret;
2468     }
2469
2470     /* if the decoder provides a pts, use it instead of the last packet pts.
2471        the decoder could be delaying output by a packet or more. */
2472     if (decoded_frame->pts != AV_NOPTS_VALUE)
2473         ist->dts = ist->next_dts = ist->pts = ist->next_pts = decoded_frame->pts;
2474
2475     /* increment next_dts to use for the case where the input stream does not
2476        have timestamps or there are multiple frames in the packet */
2477     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2478                      avctx->sample_rate;
2479     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2480                      avctx->sample_rate;
2481
2482
2483     // preprocess audio (volume)
2484     if (audio_volume != 256) {
2485         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
2486         void *samples = decoded_frame->data[0];
2487         switch (avctx->sample_fmt) {
2488         case AV_SAMPLE_FMT_U8:
2489         {
2490             uint8_t *volp = samples;
2491             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2492                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
2493                 *volp++ = av_clip_uint8(v);
2494             }
2495             break;
2496         }
2497         case AV_SAMPLE_FMT_S16:
2498         {
2499             int16_t *volp = samples;
2500             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2501                 int v = ((*volp) * audio_volume + 128) >> 8;
2502                 *volp++ = av_clip_int16(v);
2503             }
2504             break;
2505         }
2506         case AV_SAMPLE_FMT_S32:
2507         {
2508             int32_t *volp = samples;
2509             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2510                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
2511                 *volp++ = av_clipl_int32(v);
2512             }
2513             break;
2514         }
2515         case AV_SAMPLE_FMT_FLT:
2516         {
2517             float *volp = samples;
2518             float scale = audio_volume / 256.f;
2519             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2520                 *volp++ *= scale;
2521             }
2522             break;
2523         }
2524         case AV_SAMPLE_FMT_DBL:
2525         {
2526             double *volp = samples;
2527             double scale = audio_volume / 256.;
2528             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2529                 *volp++ *= scale;
2530             }
2531             break;
2532         }
2533         default:
2534             av_log(NULL, AV_LOG_FATAL,
2535                    "Audio volume adjustment on sample format %s is not supported.\n",
2536                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
2537             exit_program(1);
2538         }
2539     }
2540
2541     rate_emu_sleep(ist);
2542
2543     for (i = 0; i < nb_output_streams; i++) {
2544         OutputStream *ost = output_streams[i];
2545
2546         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2547             continue;
2548         do_audio_out(output_files[ost->file_index]->ctx, ost, ist, decoded_frame);
2549     }
2550
2551     return ret;
2552 }
2553
2554 static int transcode_video(InputStream *ist, AVPacket *pkt, int *got_output, int64_t *pkt_pts)
2555 {
2556     AVFrame *decoded_frame;
2557     void *buffer_to_free = NULL;
2558     int i, ret = 0, resample_changed;
2559     int64_t *best_effort_timestamp;
2560     AVRational *frame_sample_aspect;
2561     float quality;
2562
2563     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2564         return AVERROR(ENOMEM);
2565     else
2566         avcodec_get_frame_defaults(ist->decoded_frame);
2567     decoded_frame = ist->decoded_frame;
2568     pkt->pts  = *pkt_pts;
2569     pkt->dts  = ist->dts;
2570     *pkt_pts  = AV_NOPTS_VALUE;
2571
2572     update_benchmark(NULL);
2573     ret = avcodec_decode_video2(ist->st->codec,
2574                                 decoded_frame, got_output, pkt);
2575     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
2576     if (ret < 0)
2577         return ret;
2578
2579     quality = same_quant ? decoded_frame->quality : 0;
2580     if (!*got_output) {
2581         /* no picture yet */
2582         if (!pkt->size)
2583             for (i = 0; i < ist->nb_filters; i++)
2584                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
2585         return ret;
2586     }
2587
2588     best_effort_timestamp= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "best_effort_timestamp");
2589     if(*best_effort_timestamp != AV_NOPTS_VALUE)
2590         ist->next_pts = ist->pts = decoded_frame->pts = *best_effort_timestamp;
2591
2592     pkt->size = 0;
2593
2594     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2595
2596     rate_emu_sleep(ist);
2597
2598     if (ist->st->sample_aspect_ratio.num)
2599         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2600
2601     resample_changed = ist->resample_width   != decoded_frame->width  ||
2602                        ist->resample_height  != decoded_frame->height ||
2603                        ist->resample_pix_fmt != decoded_frame->format;
2604     if (resample_changed) {
2605         av_log(NULL, AV_LOG_INFO,
2606                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2607                ist->file_index, ist->st->index,
2608                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2609                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2610
2611         ist->resample_width   = decoded_frame->width;
2612         ist->resample_height  = decoded_frame->height;
2613         ist->resample_pix_fmt = decoded_frame->format;
2614
2615         for (i = 0; i < nb_filtergraphs; i++)
2616             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2617                 configure_filtergraph(filtergraphs[i]) < 0) {
2618                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2619                 exit_program(1);
2620             }
2621     }
2622
2623     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2624     for (i = 0; i < ist->nb_filters; i++) {
2625         int changed =      ist->st->codec->width   != ist->filters[i]->filter->outputs[0]->w
2626                         || ist->st->codec->height  != ist->filters[i]->filter->outputs[0]->h
2627                         || ist->st->codec->pix_fmt != ist->filters[i]->filter->outputs[0]->format;
2628         // XXX what an ugly hack
2629         if (ist->filters[i]->graph->nb_outputs == 1)
2630             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2631
2632         if (!frame_sample_aspect->num)
2633             *frame_sample_aspect = ist->st->sample_aspect_ratio;
2634         if (ist->dr1 && decoded_frame->type==FF_BUFFER_TYPE_USER && !changed) {
2635             FrameBuffer      *buf = decoded_frame->opaque;
2636             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2637                                         decoded_frame->data, decoded_frame->linesize,
2638                                         AV_PERM_READ | AV_PERM_PRESERVE,
2639                                         ist->st->codec->width, ist->st->codec->height,
2640                                         ist->st->codec->pix_fmt);
2641
2642             avfilter_copy_frame_props(fb, decoded_frame);
2643             fb->buf->priv           = buf;
2644             fb->buf->free           = filter_release_buffer;
2645
2646             av_assert0(buf->refcount>0);
2647             buf->refcount++;
2648             av_buffersrc_buffer(ist->filters[i]->filter, fb);
2649         } else
2650         if(av_vsrc_buffer_add_frame(ist->filters[i]->filter, decoded_frame,AV_VSRC_BUF_FLAG_OVERWRITE)<0) {
2651             av_log(NULL, AV_LOG_FATAL, "Failed to inject frame into filter network\n");
2652             exit_program(1);
2653         }
2654
2655     }
2656
2657     av_free(buffer_to_free);
2658     return ret;
2659 }
2660
2661 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2662 {
2663     AVSubtitle subtitle;
2664     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2665                                           &subtitle, got_output, pkt);
2666     if (ret < 0)
2667         return ret;
2668     if (!*got_output)
2669         return ret;
2670
2671     rate_emu_sleep(ist);
2672
2673     for (i = 0; i < nb_output_streams; i++) {
2674         OutputStream *ost = output_streams[i];
2675
2676         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2677             continue;
2678
2679         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2680     }
2681
2682     avsubtitle_free(&subtitle);
2683     return ret;
2684 }
2685
2686 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2687 static int output_packet(InputStream *ist, const AVPacket *pkt)
2688 {
2689     int ret = 0, i;
2690     int got_output;
2691     int64_t pkt_pts = AV_NOPTS_VALUE;
2692
2693     AVPacket avpkt;
2694
2695     if (ist->next_dts == AV_NOPTS_VALUE)
2696         ist->next_dts = ist->dts;
2697     if (ist->next_pts == AV_NOPTS_VALUE)
2698         ist->next_pts = ist->pts;
2699
2700     if (pkt == NULL) {
2701         /* EOF handling */
2702         av_init_packet(&avpkt);
2703         avpkt.data = NULL;
2704         avpkt.size = 0;
2705         goto handle_eof;
2706     } else {
2707         avpkt = *pkt;
2708     }
2709
2710     if (pkt->dts != AV_NOPTS_VALUE) {
2711         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2712         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2713             ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2714     }
2715     if(pkt->pts != AV_NOPTS_VALUE)
2716         pkt_pts = av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2717
2718     // while we have more to decode or while the decoder did output something on EOF
2719     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2720         int duration;
2721     handle_eof:
2722
2723         ist->pts = ist->next_pts;
2724         ist->dts = ist->next_dts;
2725
2726         if (avpkt.size && avpkt.size != pkt->size) {
2727             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2728                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2729             ist->showed_multi_packet_warning = 1;
2730         }
2731
2732         switch (ist->st->codec->codec_type) {
2733         case AVMEDIA_TYPE_AUDIO:
2734             ret = transcode_audio    (ist, &avpkt, &got_output);
2735             break;
2736         case AVMEDIA_TYPE_VIDEO:
2737             ret = transcode_video    (ist, &avpkt, &got_output, &pkt_pts);
2738             if (avpkt.duration) {
2739                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2740             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
2741                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
2742                 duration = ((int64_t)AV_TIME_BASE *
2743                                 ist->st->codec->time_base.num * ticks) /
2744                                 ist->st->codec->time_base.den;
2745             } else
2746                 duration = 0;
2747
2748             if(ist->dts != AV_NOPTS_VALUE && duration) {
2749                 ist->next_dts += duration;
2750             }else
2751                 ist->next_dts = AV_NOPTS_VALUE;
2752
2753             if (got_output)
2754                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
2755             break;
2756         case AVMEDIA_TYPE_SUBTITLE:
2757             ret = transcode_subtitles(ist, &avpkt, &got_output);
2758             break;
2759         default:
2760             return -1;
2761         }
2762
2763         if (ret < 0)
2764             return ret;
2765
2766         avpkt.dts=
2767         avpkt.pts= AV_NOPTS_VALUE;
2768
2769         // touch data and size only if not EOF
2770         if (pkt) {
2771             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
2772                 ret = avpkt.size;
2773             avpkt.data += ret;
2774             avpkt.size -= ret;
2775         }
2776         if (!got_output) {
2777             continue;
2778         }
2779     }
2780
2781     /* handle stream copy */
2782     if (!ist->decoding_needed) {
2783         rate_emu_sleep(ist);
2784         ist->dts = ist->next_dts;
2785         switch (ist->st->codec->codec_type) {
2786         case AVMEDIA_TYPE_AUDIO:
2787             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2788                              ist->st->codec->sample_rate;
2789             break;
2790         case AVMEDIA_TYPE_VIDEO:
2791             if (pkt->duration) {
2792                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2793             } else if(ist->st->codec->time_base.num != 0) {
2794                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2795                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2796                                   ist->st->codec->time_base.num * ticks) /
2797                                   ist->st->codec->time_base.den;
2798             }
2799             break;
2800         }
2801         ist->pts = ist->dts;
2802         ist->next_pts = ist->next_dts;
2803     }
2804     for (i = 0; pkt && i < nb_output_streams; i++) {
2805         OutputStream *ost = output_streams[i];
2806
2807         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2808             continue;
2809
2810         do_streamcopy(ist, ost, pkt);
2811     }
2812
2813     return 0;
2814 }
2815
2816 static void print_sdp(void)
2817 {
2818     char sdp[2048];
2819     int i;
2820     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2821
2822     if (!avc)
2823         exit_program(1);
2824     for (i = 0; i < nb_output_files; i++)
2825         avc[i] = output_files[i]->ctx;
2826
2827     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2828     printf("SDP:\n%s\n", sdp);
2829     fflush(stdout);
2830     av_freep(&avc);
2831 }
2832
2833 static int init_input_stream(int ist_index, char *error, int error_len)
2834 {
2835     int i;
2836     InputStream *ist = input_streams[ist_index];
2837
2838     if (ist->decoding_needed) {
2839         AVCodec *codec = ist->dec;
2840         if (!codec) {
2841             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2842                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
2843             return AVERROR(EINVAL);
2844         }
2845
2846         ist->dr1 = codec->capabilities & CODEC_CAP_DR1;
2847         if (codec->type == AVMEDIA_TYPE_VIDEO && ist->dr1) {
2848             ist->st->codec->get_buffer     = codec_get_buffer;
2849             ist->st->codec->release_buffer = codec_release_buffer;
2850             ist->st->codec->opaque         = ist;
2851         }
2852
2853         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2854             av_dict_set(&ist->opts, "threads", "auto", 0);
2855         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2856             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2857                     ist->file_index, ist->st->index);
2858             return AVERROR(EINVAL);
2859         }
2860         assert_codec_experimental(ist->st->codec, 0);
2861         assert_avoptions(ist->opts);
2862
2863         if (ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2864             for (i = 0; i < nb_output_streams; i++) {
2865                 OutputStream *ost = output_streams[i];
2866                 if (ost->source_index == ist_index) {
2867                     if (!ist->st->codec->channel_layout || !ost->st->codec->channel_layout)
2868                         get_default_channel_layouts(ost, ist);
2869                     break;
2870                 }
2871             }
2872         }
2873     }
2874
2875     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;
2876     ist->next_pts = AV_NOPTS_VALUE;
2877     ist->next_dts = AV_NOPTS_VALUE;
2878     ist->is_start = 1;
2879
2880     return 0;
2881 }
2882
2883 static InputStream *get_input_stream(OutputStream *ost)
2884 {
2885     if (ost->source_index >= 0)
2886         return input_streams[ost->source_index];
2887
2888     if (ost->filter) {
2889         FilterGraph *fg = ost->filter->graph;
2890         int i;
2891
2892         for (i = 0; i < fg->nb_inputs; i++)
2893             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
2894                 return fg->inputs[i]->ist;
2895     }
2896
2897     return NULL;
2898 }
2899
2900 static int transcode_init(void)
2901 {
2902     int ret = 0, i, j, k;
2903     AVFormatContext *oc;
2904     AVCodecContext *codec, *icodec;
2905     OutputStream *ost;
2906     InputStream *ist;
2907     char error[1024];
2908     int want_sdp = 1;
2909
2910     /* init framerate emulation */
2911     for (i = 0; i < nb_input_files; i++) {
2912         InputFile *ifile = input_files[i];
2913         if (ifile->rate_emu)
2914             for (j = 0; j < ifile->nb_streams; j++)
2915                 input_streams[j + ifile->ist_index]->start = av_gettime();
2916     }
2917
2918     /* output stream init */
2919     for (i = 0; i < nb_output_files; i++) {
2920         oc = output_files[i]->ctx;
2921         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2922             av_dump_format(oc, i, oc->filename, 1);
2923             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2924             return AVERROR(EINVAL);
2925         }
2926     }
2927
2928     /* init complex filtergraphs */
2929     for (i = 0; i < nb_filtergraphs; i++)
2930         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2931             return ret;
2932
2933     /* for each output stream, we compute the right encoding parameters */
2934     for (i = 0; i < nb_output_streams; i++) {
2935         ost = output_streams[i];
2936         oc  = output_files[ost->file_index]->ctx;
2937         ist = get_input_stream(ost);
2938
2939         if (ost->attachment_filename)
2940             continue;
2941
2942         codec  = ost->st->codec;
2943
2944         if (ist) {
2945             icodec = ist->st->codec;
2946
2947             ost->st->disposition          = ist->st->disposition;
2948             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2949             codec->chroma_sample_location = icodec->chroma_sample_location;
2950         }
2951
2952         if (ost->stream_copy) {
2953             uint64_t extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2954
2955             if (extra_size > INT_MAX) {
2956                 return AVERROR(EINVAL);
2957             }
2958
2959             /* if stream_copy is selected, no need to decode or encode */
2960             codec->codec_id   = icodec->codec_id;
2961             codec->codec_type = icodec->codec_type;
2962
2963             if (!codec->codec_tag) {
2964                 if (!oc->oformat->codec_tag ||
2965                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2966                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2967                     codec->codec_tag = icodec->codec_tag;
2968             }
2969
2970             codec->bit_rate       = icodec->bit_rate;
2971             codec->rc_max_rate    = icodec->rc_max_rate;
2972             codec->rc_buffer_size = icodec->rc_buffer_size;
2973             codec->field_order    = icodec->field_order;
2974             codec->extradata      = av_mallocz(extra_size);
2975             if (!codec->extradata) {
2976                 return AVERROR(ENOMEM);
2977             }
2978             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2979             codec->extradata_size= icodec->extradata_size;
2980
2981             codec->time_base = ist->st->time_base;
2982             /*
2983              * Avi is a special case here because it supports variable fps but
2984              * having the fps and timebase differe significantly adds quite some
2985              * overhead
2986              */
2987             if(!strcmp(oc->oformat->name, "avi")) {
2988                 if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2989                                  && av_q2d(ist->st->time_base) < 1.0/500
2990                     || copy_tb==0){
2991                     codec->time_base = icodec->time_base;
2992                     codec->time_base.num *= icodec->ticks_per_frame;
2993                     codec->time_base.den *= 2;
2994                     codec->ticks_per_frame = 2;
2995                 }
2996             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2997                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2998                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2999             ) {
3000                 if(   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
3001                                 && av_q2d(ist->st->time_base) < 1.0/500
3002                    || copy_tb==0){
3003                     codec->time_base = icodec->time_base;
3004                     codec->time_base.num *= icodec->ticks_per_frame;
3005                 }
3006             }
3007             av_reduce(&codec->time_base.num, &codec->time_base.den,
3008                         codec->time_base.num, codec->time_base.den, INT_MAX);
3009
3010             switch (codec->codec_type) {
3011             case AVMEDIA_TYPE_AUDIO:
3012                 if (audio_volume != 256) {
3013                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
3014                     exit_program(1);
3015                 }
3016                 codec->channel_layout     = icodec->channel_layout;
3017                 codec->sample_rate        = icodec->sample_rate;
3018                 codec->channels           = icodec->channels;
3019                 codec->frame_size         = icodec->frame_size;
3020                 codec->audio_service_type = icodec->audio_service_type;
3021                 codec->block_align        = icodec->block_align;
3022                 break;
3023             case AVMEDIA_TYPE_VIDEO:
3024                 codec->pix_fmt            = icodec->pix_fmt;
3025                 codec->width              = icodec->width;
3026                 codec->height             = icodec->height;
3027                 codec->has_b_frames       = icodec->has_b_frames;
3028                 if (!codec->sample_aspect_ratio.num) {
3029                     codec->sample_aspect_ratio   =
3030                     ost->st->sample_aspect_ratio =
3031                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
3032                         ist->st->codec->sample_aspect_ratio.num ?
3033                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
3034                 }
3035                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
3036                 break;
3037             case AVMEDIA_TYPE_SUBTITLE:
3038                 codec->width  = icodec->width;
3039                 codec->height = icodec->height;
3040                 break;
3041             case AVMEDIA_TYPE_DATA:
3042             case AVMEDIA_TYPE_ATTACHMENT:
3043                 break;
3044             default:
3045                 abort();
3046             }
3047         } else {
3048             if (!ost->enc)
3049                 ost->enc = avcodec_find_encoder(codec->codec_id);
3050             if (!ost->enc) {
3051                 /* should only happen when a default codec is not present. */
3052                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
3053                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
3054                 ret = AVERROR(EINVAL);
3055                 goto dump_format;
3056             }
3057
3058             if (ist)
3059                 ist->decoding_needed = 1;
3060             ost->encoding_needed = 1;
3061
3062             switch (codec->codec_type) {
3063             case AVMEDIA_TYPE_AUDIO:
3064                 ost->fifo = av_fifo_alloc(1024);
3065                 if (!ost->fifo) {
3066                     return AVERROR(ENOMEM);
3067                 }
3068                 if (!codec->sample_rate)
3069                     codec->sample_rate = icodec->sample_rate;
3070                 choose_sample_rate(ost->st, ost->enc);
3071                 codec->time_base = (AVRational){ 1, codec->sample_rate };
3072
3073                 if (codec->sample_fmt == AV_SAMPLE_FMT_NONE)
3074                     codec->sample_fmt = icodec->sample_fmt;
3075                 choose_sample_fmt(ost->st, ost->enc);
3076
3077                 if (ost->audio_channels_mapped) {
3078                     /* the requested output channel is set to the number of
3079                      * -map_channel only if no -ac are specified */
3080                     if (!codec->channels) {
3081                         codec->channels       = ost->audio_channels_mapped;
3082                         codec->channel_layout = av_get_default_channel_layout(codec->channels);
3083                         if (!codec->channel_layout) {
3084                             av_log(NULL, AV_LOG_FATAL, "Unable to find an appropriate channel layout for requested number of channel\n");
3085                             exit_program(1);
3086                         }
3087                     }
3088                     /* fill unused channel mapping with -1 (which means a muted
3089                      * channel in case the number of output channels is bigger
3090                      * than the number of mapped channel) */
3091                     for (j = ost->audio_channels_mapped; j < FF_ARRAY_ELEMS(ost->audio_channels_map); j++)
3092                         ost->audio_channels_map[j] = -1;
3093                 } else if (!codec->channels) {
3094                     codec->channels = icodec->channels;
3095                     codec->channel_layout = icodec->channel_layout;
3096                 }
3097                 if (av_get_channel_layout_nb_channels(codec->channel_layout) != codec->channels)
3098                     codec->channel_layout = 0;
3099
3100                 ost->audio_resample       = codec->sample_rate != icodec->sample_rate || audio_sync_method > 1;
3101                 ost->audio_resample      |=    codec->sample_fmt     != icodec->sample_fmt
3102                                             || codec->channel_layout != icodec->channel_layout;
3103                 icodec->request_channels  = codec->channels;
3104                 ost->resample_sample_fmt  = icodec->sample_fmt;
3105                 ost->resample_sample_rate = icodec->sample_rate;
3106                 ost->resample_channels    = icodec->channels;
3107                 break;
3108             case AVMEDIA_TYPE_VIDEO:
3109                 if (!ost->filter) {
3110                     FilterGraph *fg;
3111                     fg = init_simple_filtergraph(ist, ost);
3112                     if (configure_video_filters(fg)) {
3113                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
3114                         exit(1);
3115                     }
3116                 }
3117
3118                 if (ist && !ost->frame_rate.num)
3119                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational) { 25, 1 };
3120                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
3121                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
3122                     ost->frame_rate = ost->enc->supported_framerates[idx];
3123                 }
3124                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
3125                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
3126                    && (video_sync_method == VSYNC_CFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
3127                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
3128                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
3129                 }
3130                 for (j = 0; j < ost->forced_kf_count; j++)
3131                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
3132                                                          AV_TIME_BASE_Q,
3133                                                          codec->time_base);
3134
3135                 codec->width  = ost->filter->filter->inputs[0]->w;
3136                 codec->height = ost->filter->filter->inputs[0]->h;
3137                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
3138                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
3139                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
3140                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
3141                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
3142
3143                 if (codec->width   != icodec->width  ||
3144                     codec->height  != icodec->height ||
3145                     codec->pix_fmt != icodec->pix_fmt) {
3146                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
3147                 }
3148
3149                 break;
3150             case AVMEDIA_TYPE_SUBTITLE:
3151                 codec->time_base = (AVRational){1, 1000};
3152                 break;
3153             default:
3154                 abort();
3155                 break;
3156             }
3157             /* two pass mode */
3158             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
3159                 char logfilename[1024];
3160                 FILE *f;
3161
3162                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
3163                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
3164                          i);
3165                 if (!strcmp(ost->enc->name, "libx264")) {
3166                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
3167                 } else {
3168                     if (codec->flags & CODEC_FLAG_PASS2) {
3169                         char  *logbuffer;
3170                         size_t logbuffer_size;
3171                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
3172                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
3173                                 logfilename);
3174                             exit_program(1);
3175                         }
3176                         codec->stats_in = logbuffer;
3177                     }
3178                     if (codec->flags & CODEC_FLAG_PASS1) {
3179                         f = fopen(logfilename, "wb");
3180                         if (!f) {
3181                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
3182                                 logfilename, strerror(errno));
3183                             exit_program(1);
3184                         }
3185                         ost->logfile = f;
3186                     }
3187                 }
3188             }
3189         }
3190     }
3191
3192     /* open each encoder */
3193     for (i = 0; i < nb_output_streams; i++) {
3194         ost = output_streams[i];
3195         if (ost->encoding_needed) {
3196             AVCodec      *codec = ost->enc;
3197             AVCodecContext *dec = NULL;
3198
3199             if ((ist = get_input_stream(ost)))
3200                 dec = ist->st->codec;
3201             if (dec && dec->subtitle_header) {
3202                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
3203                 if (!ost->st->codec->subtitle_header) {
3204                     ret = AVERROR(ENOMEM);
3205                     goto dump_format;
3206                 }
3207                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
3208                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
3209             }
3210             if (!av_dict_get(ost->opts, "threads", NULL, 0))
3211                 av_dict_set(&ost->opts, "threads", "auto", 0);
3212             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
3213                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
3214                         ost->file_index, ost->index);
3215                 ret = AVERROR(EINVAL);
3216                 goto dump_format;
3217             }
3218             assert_codec_experimental(ost->st->codec, 1);
3219             assert_avoptions(ost->opts);
3220             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
3221                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
3222                                              " It takes bits/s as argument, not kbits/s\n");
3223             extra_size += ost->st->codec->extradata_size;
3224
3225             if (ost->st->codec->me_threshold)
3226                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
3227         }
3228     }
3229
3230     /* init input streams */
3231     for (i = 0; i < nb_input_streams; i++)
3232         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
3233             goto dump_format;
3234
3235     /* discard unused programs */
3236     for (i = 0; i < nb_input_files; i++) {
3237         InputFile *ifile = input_files[i];
3238         for (j = 0; j < ifile->ctx->nb_programs; j++) {
3239             AVProgram *p = ifile->ctx->programs[j];
3240             int discard  = AVDISCARD_ALL;
3241
3242             for (k = 0; k < p->nb_stream_indexes; k++)
3243                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
3244                     discard = AVDISCARD_DEFAULT;
3245                     break;
3246                 }
3247             p->discard = discard;
3248         }
3249     }
3250
3251     /* open files and write file headers */
3252     for (i = 0; i < nb_output_files; i++) {
3253         oc = output_files[i]->ctx;
3254         oc->interrupt_callback = int_cb;
3255         if (avformat_write_header(oc, &output_files[i]->opts) < 0) {
3256             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?)", i);
3257             ret = AVERROR(EINVAL);
3258             goto dump_format;
3259         }
3260 //         assert_avoptions(output_files[i]->opts);
3261         if (strcmp(oc->oformat->name, "rtp")) {
3262             want_sdp = 0;
3263         }
3264     }
3265
3266  dump_format:
3267     /* dump the file output parameters - cannot be done before in case
3268        of stream copy */
3269     for (i = 0; i < nb_output_files; i++) {
3270         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
3271     }
3272
3273     /* dump the stream mapping */
3274     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
3275     for (i = 0; i < nb_input_streams; i++) {
3276         ist = input_streams[i];
3277
3278         for (j = 0; j < ist->nb_filters; j++) {
3279             AVFilterLink *link = ist->filters[j]->filter->outputs[0];
3280             if (ist->filters[j]->graph->graph_desc) {
3281                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
3282                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
3283                        link->dst->filter->name);
3284                 if (link->dst->input_count > 1)
3285                     av_log(NULL, AV_LOG_INFO, ":%s", link->dstpad->name);
3286                 if (nb_filtergraphs > 1)
3287                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
3288                 av_log(NULL, AV_LOG_INFO, "\n");
3289             }
3290         }
3291     }
3292
3293     for (i = 0; i < nb_output_streams; i++) {
3294         ost = output_streams[i];
3295
3296         if (ost->attachment_filename) {
3297             /* an attached file */
3298             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
3299                    ost->attachment_filename, ost->file_index, ost->index);
3300             continue;
3301         }
3302
3303         if (ost->filter && ost->filter->graph->graph_desc) {
3304             /* output from a complex graph */
3305             AVFilterLink *link = ost->filter->filter->inputs[0];
3306             av_log(NULL, AV_LOG_INFO, "  %s", link->src->filter->name);
3307             if (link->src->output_count > 1)
3308                 av_log(NULL, AV_LOG_INFO, ":%s", link->srcpad->name);
3309             if (nb_filtergraphs > 1)
3310                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
3311
3312             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
3313                    ost->index, ost->enc ? ost->enc->name : "?");
3314             continue;
3315         }
3316
3317         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
3318                input_streams[ost->source_index]->file_index,
3319                input_streams[ost->source_index]->st->index,
3320                ost->file_index,
3321                ost->index);
3322         if (ost->audio_channels_mapped) {
3323             av_log(NULL, AV_LOG_INFO, " [ch:");
3324             for (j = 0; j < ost->audio_channels_mapped; j++)
3325                 if (ost->audio_channels_map[j] == -1)
3326                     av_log(NULL, AV_LOG_INFO, " M");
3327                 else
3328                     av_log(NULL, AV_LOG_INFO, " %d", ost->audio_channels_map[j]);
3329             av_log(NULL, AV_LOG_INFO, "]");
3330         }
3331         if (ost->sync_ist != input_streams[ost->source_index])
3332             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
3333                    ost->sync_ist->file_index,
3334                    ost->sync_ist->st->index);
3335         if (ost->stream_copy)
3336             av_log(NULL, AV_LOG_INFO, " (copy)");
3337         else
3338             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
3339                    input_streams[ost->source_index]->dec->name : "?",
3340                    ost->enc ? ost->enc->name : "?");
3341         av_log(NULL, AV_LOG_INFO, "\n");
3342     }
3343
3344     if (ret) {
3345         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
3346         return ret;
3347     }
3348
3349     if (want_sdp) {
3350         print_sdp();
3351     }
3352
3353     return 0;
3354 }
3355
3356 /*
3357  * The following code is the main loop of the file converter
3358  */
3359 static int transcode(void)
3360 {
3361     int ret, i;
3362     AVFormatContext *is, *os;
3363     OutputStream *ost;
3364     InputStream *ist;
3365     uint8_t *no_packet;
3366     int no_packet_count = 0;
3367     int64_t timer_start;
3368     int key;
3369
3370     if (!(no_packet = av_mallocz(nb_input_files)))
3371         exit_program(1);
3372
3373     ret = transcode_init();
3374     if (ret < 0)
3375         goto fail;
3376
3377     if (!using_stdin) {
3378         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
3379     }
3380
3381     timer_start = av_gettime();
3382
3383     for (; received_sigterm == 0;) {
3384         int file_index, ist_index, past_recording_time = 1;
3385         AVPacket pkt;
3386         int64_t ipts_min;
3387         int64_t cur_time= av_gettime();
3388
3389         ipts_min = INT64_MAX;
3390         /* if 'q' pressed, exits */
3391         if (!using_stdin) {
3392             static int64_t last_time;
3393             if (received_nb_signals)
3394                 break;
3395             /* read_key() returns 0 on EOF */
3396             if(cur_time - last_time >= 100000 && !run_as_daemon){
3397                 key =  read_key();
3398                 last_time = cur_time;
3399             }else
3400                 key = -1;
3401             if (key == 'q')
3402                 break;
3403             if (key == '+') av_log_set_level(av_log_get_level()+10);
3404             if (key == '-') av_log_set_level(av_log_get_level()-10);
3405             if (key == 's') qp_hist     ^= 1;
3406             if (key == 'h'){
3407                 if (do_hex_dump){
3408                     do_hex_dump = do_pkt_dump = 0;
3409                 } else if(do_pkt_dump){
3410                     do_hex_dump = 1;
3411                 } else
3412                     do_pkt_dump = 1;
3413                 av_log_set_level(AV_LOG_DEBUG);
3414             }
3415             if (key == 'c' || key == 'C'){
3416                 char buf[4096], target[64], command[256], arg[256] = {0};
3417                 double time;
3418                 int k, n = 0;
3419                 fprintf(stderr, "\nEnter command: <target> <time> <command>[ <argument>]\n");
3420                 i = 0;
3421                 while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3422                     if (k > 0)
3423                         buf[i++] = k;
3424                 buf[i] = 0;
3425                 if (k > 0 &&
3426                     (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
3427                     av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
3428                            target, time, command, arg);
3429                     for (i = 0; i < nb_filtergraphs; i++) {
3430                         FilterGraph *fg = filtergraphs[i];
3431                         if (fg->graph) {
3432                             if (time < 0) {
3433                                 ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
3434                                                                   key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
3435                                 fprintf(stderr, "Command reply for stream %d: ret:%d res:%s\n", i, ret, buf);
3436                             } else {
3437                                 ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
3438                             }
3439                         }
3440                     }
3441                 } else {
3442                     av_log(NULL, AV_LOG_ERROR,
3443                            "Parse error, at least 3 arguments were expected, "
3444                            "only %d given in string '%s'\n", n, buf);
3445                 }
3446             }
3447             if (key == 'd' || key == 'D'){
3448                 int debug=0;
3449                 if(key == 'D') {
3450                     debug = input_streams[0]->st->codec->debug<<1;
3451                     if(!debug) debug = 1;
3452                     while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
3453                         debug += debug;
3454                 }else
3455                     if(scanf("%d", &debug)!=1)
3456                         fprintf(stderr,"error parsing debug value\n");
3457                 for(i=0;i<nb_input_streams;i++) {
3458                     input_streams[i]->st->codec->debug = debug;
3459                 }
3460                 for(i=0;i<nb_output_streams;i++) {
3461                     ost = output_streams[i];
3462                     ost->st->codec->debug = debug;
3463                 }
3464                 if(debug) av_log_set_level(AV_LOG_DEBUG);
3465                 fprintf(stderr,"debug=%d\n", debug);
3466             }
3467             if (key == '?'){
3468                 fprintf(stderr, "key    function\n"
3469                                 "?      show this help\n"
3470                                 "+      increase verbosity\n"
3471                                 "-      decrease verbosity\n"
3472                                 "c      Send command to filtergraph\n"
3473                                 "D      cycle through available debug modes\n"
3474                                 "h      dump packets/hex press to cycle through the 3 states\n"
3475                                 "q      quit\n"
3476                                 "s      Show QP histogram\n"
3477                 );
3478             }
3479         }
3480
3481         /* check if there's any stream where output is still needed */
3482         for (i = 0; i < nb_output_streams; i++) {
3483             OutputFile *of;
3484             ost = output_streams[i];
3485             of  = output_files[ost->file_index];
3486             os  = output_files[ost->file_index]->ctx;
3487             if (ost->is_past_recording_time ||
3488                 (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3489                 continue;
3490             if (ost->frame_number >= ost->max_frames) {
3491                 int j;
3492                 for (j = 0; j < of->ctx->nb_streams; j++)
3493                     output_streams[of->ost_index + j]->is_past_recording_time = 1;
3494                 continue;
3495             }
3496             past_recording_time = 0;
3497         }
3498         if (past_recording_time)
3499             break;
3500
3501         /* select the stream that we must read now by looking at the
3502            smallest output pts */
3503         file_index = -1;
3504         for (i = 0; i < nb_input_streams; i++) {
3505             int64_t ipts;
3506             ist = input_streams[i];
3507             ipts = ist->pts;
3508             if (ist->discard || no_packet[ist->file_index])
3509                 continue;
3510             if (!input_files[ist->file_index]->eof_reached) {
3511                 if (ipts < ipts_min) {
3512                     ipts_min = ipts;
3513                     file_index = ist->file_index;
3514                 }
3515             }
3516         }
3517         /* if none, if is finished */
3518         if (file_index < 0) {
3519             if (no_packet_count) {
3520                 no_packet_count = 0;
3521                 memset(no_packet, 0, nb_input_files);
3522                 usleep(10000);
3523                 continue;
3524             }
3525             break;
3526         }
3527
3528         /* read a frame from it and output it in the fifo */
3529         is  = input_files[file_index]->ctx;
3530         ret = av_read_frame(is, &pkt);
3531         if (ret == AVERROR(EAGAIN)) {
3532             no_packet[file_index] = 1;
3533             no_packet_count++;
3534             continue;
3535         }
3536         if (ret < 0) {
3537             input_files[file_index]->eof_reached = 1;
3538
3539             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
3540                 ist = input_streams[input_files[file_index]->ist_index + i];
3541                 if (ist->decoding_needed)
3542                     output_packet(ist, NULL);
3543             }
3544
3545             if (opt_shortest)
3546                 break;
3547             else
3548                 continue;
3549         }
3550
3551         no_packet_count = 0;
3552         memset(no_packet, 0, nb_input_files);
3553
3554         if (do_pkt_dump) {
3555             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3556                              is->streams[pkt.stream_index]);
3557         }
3558         /* the following test is needed in case new streams appear
3559            dynamically in stream : we ignore them */
3560         if (pkt.stream_index >= input_files[file_index]->nb_streams)
3561             goto discard_packet;
3562         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
3563         ist = input_streams[ist_index];
3564         if (ist->discard)
3565             goto discard_packet;
3566
3567         if (pkt.dts != AV_NOPTS_VALUE)
3568             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3569         if (pkt.pts != AV_NOPTS_VALUE)
3570             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3571
3572         if (pkt.pts != AV_NOPTS_VALUE)
3573             pkt.pts *= ist->ts_scale;
3574         if (pkt.dts != AV_NOPTS_VALUE)
3575             pkt.dts *= ist->ts_scale;
3576
3577         if (debug_ts) {
3578             av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
3579                     "next_pts:%s next_pts_time:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%"PRId64"\n",
3580                     ist_index, av_get_media_type_string(ist->st->codec->codec_type),
3581                     av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &ist->st->time_base),
3582                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3583                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3584                     input_files[ist->file_index]->ts_offset);
3585         }
3586
3587         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE && !copy_ts) {
3588             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3589             int64_t delta   = pkt_dts - ist->next_dts;
3590             if (is->iformat->flags & AVFMT_TS_DISCONT) {
3591             if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3592                 (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3593                  ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3594                 pkt_dts+1<ist->pts){
3595                 input_files[ist->file_index]->ts_offset -= delta;
3596                 av_log(NULL, AV_LOG_DEBUG,
3597                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3598                        delta, input_files[ist->file_index]->ts_offset);
3599                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3600                 if (pkt.pts != AV_NOPTS_VALUE)
3601                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3602             }
3603             } else {
3604                 if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3605                     (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3606                      pkt_dts+1<ist->pts){
3607                     av_log(NULL, AV_LOG_WARNING, "DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n", pkt.dts, ist->next_dts, pkt.stream_index);
3608                     pkt.dts = AV_NOPTS_VALUE;
3609                 }
3610                 if (pkt.pts != AV_NOPTS_VALUE){
3611                     int64_t pkt_pts = av_rescale_q(pkt.pts, ist->st->time_base, AV_TIME_BASE_Q);
3612                     delta   = pkt_pts - ist->next_dts;
3613                     if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3614                         (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3615                         pkt_pts+1<ist->pts) {
3616                         av_log(NULL, AV_LOG_WARNING, "PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n", pkt.pts, ist->next_dts, pkt.stream_index);
3617                         pkt.pts = AV_NOPTS_VALUE;
3618                     }
3619                 }
3620             }
3621         }
3622
3623         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
3624         if (output_packet(ist, &pkt) < 0 || poll_filters() < 0) {
3625             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
3626                    ist->file_index, ist->st->index);
3627             if (exit_on_error)
3628                 exit_program(1);
3629             av_free_packet(&pkt);
3630             continue;
3631         }
3632
3633     discard_packet: