src_buffer: implement audio buffer copy.
[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 "libavutil/audioconvert.h"
40 #include "libavutil/parseutils.h"
41 #include "libavutil/samplefmt.h"
42 #include "libavutil/colorspace.h"
43 #include "libavutil/fifo.h"
44 #include "libavutil/intreadwrite.h"
45 #include "libavutil/dict.h"
46 #include "libavutil/mathematics.h"
47 #include "libavutil/pixdesc.h"
48 #include "libavutil/avstring.h"
49 #include "libavutil/libm.h"
50 #include "libavutil/imgutils.h"
51 #include "libavutil/timestamp.h"
52 #include "libavformat/os_support.h"
53 #include "libswresample/swresample.h"
54
55 #include "libavformat/ffm.h" // not public API
56
57 # include "libavfilter/avcodec.h"
58 # include "libavfilter/avfilter.h"
59 # include "libavfilter/avfiltergraph.h"
60 # include "libavfilter/buffersink.h"
61 # include "libavfilter/buffersrc.h"
62 # include "libavfilter/vsrc_buffer.h"
63
64 #if HAVE_SYS_RESOURCE_H
65 #include <sys/types.h>
66 #include <sys/time.h>
67 #include <sys/resource.h>
68 #elif HAVE_GETPROCESSTIMES
69 #include <windows.h>
70 #endif
71 #if HAVE_GETPROCESSMEMORYINFO
72 #include <windows.h>
73 #include <psapi.h>
74 #endif
75
76 #if HAVE_SYS_SELECT_H
77 #include <sys/select.h>
78 #endif
79
80 #if HAVE_TERMIOS_H
81 #include <fcntl.h>
82 #include <sys/ioctl.h>
83 #include <sys/time.h>
84 #include <termios.h>
85 #elif HAVE_KBHIT
86 #include <conio.h>
87 #endif
88 #include <time.h>
89
90 #include "cmdutils.h"
91
92 #include "libavutil/avassert.h"
93
94 #define VSYNC_AUTO       -1
95 #define VSYNC_PASSTHROUGH 0
96 #define VSYNC_CFR         1
97 #define VSYNC_VFR         2
98 #define VSYNC_DROP        0xff
99
100 const char program_name[] = "ffmpeg";
101 const int program_birth_year = 2000;
102
103 /* select an input stream for an output stream */
104 typedef struct StreamMap {
105     int disabled;           /** 1 is this mapping is disabled by a negative map */
106     int file_index;
107     int stream_index;
108     int sync_file_index;
109     int sync_stream_index;
110     char *linklabel;       /** name of an output link, for mapping lavfi outputs */
111 } StreamMap;
112
113 typedef struct {
114     int  file_idx,  stream_idx,  channel_idx; // input
115     int ofile_idx, ostream_idx;               // output
116 } AudioChannelMap;
117
118 static const OptionDef options[];
119
120 #define MAX_STREAMS 1024    /* arbitrary sanity check value */
121
122 static int frame_bits_per_raw_sample = 0;
123 static int video_discard = 0;
124 static int same_quant = 0;
125 static int do_deinterlace = 0;
126 static int intra_dc_precision = 8;
127 static int qp_hist = 0;
128 static int intra_only = 0;
129 static const char *video_codec_name    = NULL;
130 static const char *audio_codec_name    = NULL;
131 static const char *subtitle_codec_name = NULL;
132
133 static int file_overwrite = 0;
134 static int no_file_overwrite = 0;
135 static int do_benchmark = 0;
136 static int do_benchmark_all = 0;
137 static int do_hex_dump = 0;
138 static int do_pkt_dump = 0;
139 static int do_psnr = 0;
140 static int do_pass = 0;
141 static const char *pass_logfilename_prefix;
142 static int video_sync_method = VSYNC_AUTO;
143 static int audio_sync_method = 0;
144 static float audio_drift_threshold = 0.1;
145 static int copy_ts = 0;
146 static int copy_tb = -1;
147 static int opt_shortest = 0;
148 static char *vstats_filename;
149 static FILE *vstats_file;
150
151 static int audio_volume = 256;
152
153 static int exit_on_error = 0;
154 static int using_stdin = 0;
155 static int run_as_daemon  = 0;
156 static volatile int received_nb_signals = 0;
157 static int64_t video_size = 0;
158 static int64_t audio_size = 0;
159 static int64_t extra_size = 0;
160 static int nb_frames_dup = 0;
161 static int nb_frames_drop = 0;
162 static int input_sync;
163
164 static float dts_delta_threshold = 10;
165 static float dts_error_threshold = 3600*30;
166
167 static int print_stats = 1;
168 static int debug_ts = 0;
169 static int current_time;
170
171 static uint8_t *audio_buf;
172 static unsigned int allocated_audio_buf_size;
173 static uint8_t *async_buf;
174 static unsigned int allocated_async_buf_size;
175
176 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
177
178 typedef struct InputFilter {
179     AVFilterContext    *filter;
180     struct InputStream *ist;
181     struct FilterGraph *graph;
182 } InputFilter;
183
184 typedef struct OutputFilter {
185     AVFilterContext     *filter;
186     struct OutputStream *ost;
187     struct FilterGraph  *graph;
188
189     /* temporary storage until stream maps are processed */
190     AVFilterInOut       *out_tmp;
191 } OutputFilter;
192
193 typedef struct FilterGraph {
194     int            index;
195     const char    *graph_desc;
196
197     AVFilterGraph *graph;
198
199     InputFilter   **inputs;
200     int          nb_inputs;
201     OutputFilter **outputs;
202     int         nb_outputs;
203 } FilterGraph;
204
205 typedef struct FrameBuffer {
206     uint8_t *base[4];
207     uint8_t *data[4];
208     int  linesize[4];
209
210     int h, w;
211     enum PixelFormat pix_fmt;
212
213     int refcount;
214     struct InputStream *ist;
215     struct FrameBuffer *next;
216 } FrameBuffer;
217
218 typedef struct InputStream {
219     int file_index;
220     AVStream *st;
221     int discard;             /* true if stream data should be discarded */
222     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
223     AVCodec *dec;
224     AVFrame *decoded_frame;
225
226     int64_t       start;     /* time when read started */
227     /* predicted dts of the next packet read for this stream or (when there are
228      * several frames in a packet) of the next frame in current packet */
229     int64_t       next_dts;
230     /* dts of the last packet read for this stream */
231     int64_t       dts;
232
233     int64_t       next_pts;  ///< synthetic pts for the next decode frame
234     int64_t       pts;       ///< current pts of the decoded frame
235     double ts_scale;
236     int is_start;            /* is 1 at the start and after a discontinuity */
237     int saw_first_ts;
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     uint64_t resample_channel_layout;
303     int resample_sample_rate;
304     float rematrix_volume;
305     AVFifoBuffer *fifo;     /* for compression: one audio fifo per codec */
306     FILE *logfile;
307
308     SwrContext *swr;
309
310     OutputFilter *filter;
311     char *avfilter;
312
313     int64_t sws_flags;
314     int64_t swr_dither_method;
315     double swr_dither_scale;
316     AVDictionary *opts;
317     int is_past_recording_time;
318     int stream_copy;
319     const char *attachment_filename;
320     int copy_initial_nonkeyframes;
321
322     enum PixelFormat pix_fmts[2];
323 } OutputStream;
324
325
326 #if HAVE_TERMIOS_H
327
328 /* init terminal so that we can grab keys */
329 static struct termios oldtty;
330 static int restore_tty;
331 #endif
332
333 typedef struct OutputFile {
334     AVFormatContext *ctx;
335     AVDictionary *opts;
336     int ost_index;       /* index of the first stream in output_streams */
337     int64_t recording_time; /* desired length of the resulting file in microseconds */
338     int64_t start_time;     /* start time in microseconds */
339     uint64_t limit_filesize; /* filesize limit expressed in bytes */
340 } OutputFile;
341
342 static InputStream **input_streams = NULL;
343 static int        nb_input_streams = 0;
344 static InputFile   **input_files   = NULL;
345 static int        nb_input_files   = 0;
346
347 static OutputStream **output_streams = NULL;
348 static int         nb_output_streams = 0;
349 static OutputFile   **output_files   = NULL;
350 static int         nb_output_files   = 0;
351
352 static FilterGraph **filtergraphs;
353 int               nb_filtergraphs;
354
355 typedef struct OptionsContext {
356     /* input/output options */
357     int64_t start_time;
358     const char *format;
359
360     SpecifierOpt *codec_names;
361     int        nb_codec_names;
362     SpecifierOpt *audio_channels;
363     int        nb_audio_channels;
364     SpecifierOpt *audio_sample_rate;
365     int        nb_audio_sample_rate;
366     SpecifierOpt *rematrix_volume;
367     int        nb_rematrix_volume;
368     SpecifierOpt *frame_rates;
369     int        nb_frame_rates;
370     SpecifierOpt *frame_sizes;
371     int        nb_frame_sizes;
372     SpecifierOpt *frame_pix_fmts;
373     int        nb_frame_pix_fmts;
374
375     /* input options */
376     int64_t input_ts_offset;
377     int rate_emu;
378
379     SpecifierOpt *ts_scale;
380     int        nb_ts_scale;
381     SpecifierOpt *dump_attachment;
382     int        nb_dump_attachment;
383
384     /* output options */
385     StreamMap *stream_maps;
386     int     nb_stream_maps;
387     AudioChannelMap *audio_channel_maps; ///< one info entry per -map_channel
388     int           nb_audio_channel_maps; ///< number of (valid) -map_channel settings
389     int metadata_global_manual;
390     int metadata_streams_manual;
391     int metadata_chapters_manual;
392     const char **attachments;
393     int       nb_attachments;
394
395     int chapters_input_file;
396
397     int64_t recording_time;
398     uint64_t limit_filesize;
399     float mux_preload;
400     float mux_max_delay;
401
402     int video_disable;
403     int audio_disable;
404     int subtitle_disable;
405     int data_disable;
406
407     /* indexed by output file stream index */
408     int   *streamid_map;
409     int nb_streamid_map;
410
411     SpecifierOpt *metadata;
412     int        nb_metadata;
413     SpecifierOpt *max_frames;
414     int        nb_max_frames;
415     SpecifierOpt *bitstream_filters;
416     int        nb_bitstream_filters;
417     SpecifierOpt *codec_tags;
418     int        nb_codec_tags;
419     SpecifierOpt *sample_fmts;
420     int        nb_sample_fmts;
421     SpecifierOpt *qscale;
422     int        nb_qscale;
423     SpecifierOpt *forced_key_frames;
424     int        nb_forced_key_frames;
425     SpecifierOpt *force_fps;
426     int        nb_force_fps;
427     SpecifierOpt *frame_aspect_ratios;
428     int        nb_frame_aspect_ratios;
429     SpecifierOpt *rc_overrides;
430     int        nb_rc_overrides;
431     SpecifierOpt *intra_matrices;
432     int        nb_intra_matrices;
433     SpecifierOpt *inter_matrices;
434     int        nb_inter_matrices;
435     SpecifierOpt *top_field_first;
436     int        nb_top_field_first;
437     SpecifierOpt *metadata_map;
438     int        nb_metadata_map;
439     SpecifierOpt *presets;
440     int        nb_presets;
441     SpecifierOpt *copy_initial_nonkeyframes;
442     int        nb_copy_initial_nonkeyframes;
443     SpecifierOpt *filters;
444     int        nb_filters;
445 } OptionsContext;
446
447 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
448 {\
449     int i, ret;\
450     for (i = 0; i < o->nb_ ## name; i++) {\
451         char *spec = o->name[i].specifier;\
452         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
453             outvar = o->name[i].u.type;\
454         else if (ret < 0)\
455             exit_program(1);\
456     }\
457 }
458
459 static int64_t getutime(void)
460 {
461 #if HAVE_GETRUSAGE
462     struct rusage rusage;
463
464     getrusage(RUSAGE_SELF, &rusage);
465     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
466 #elif HAVE_GETPROCESSTIMES
467     HANDLE proc;
468     FILETIME c, e, k, u;
469     proc = GetCurrentProcess();
470     GetProcessTimes(proc, &c, &e, &k, &u);
471     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
472 #else
473     return av_gettime();
474 #endif
475 }
476
477 static void update_benchmark(const char *fmt, ...)
478 {
479     if (do_benchmark_all) {
480         int64_t t = getutime();
481         va_list va;
482         char buf[1024];
483
484         if (fmt) {
485             va_start(va, fmt);
486             vsnprintf(buf, sizeof(buf), fmt, va);
487             va_end(va);
488             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
489         }
490         current_time = t;
491     }
492 }
493
494 static void reset_options(OptionsContext *o, int is_input)
495 {
496     const OptionDef *po = options;
497     OptionsContext bak= *o;
498     int i;
499
500     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
501     while (po->name) {
502         void *dst = (uint8_t*)o + po->u.off;
503
504         if (po->flags & OPT_SPEC) {
505             SpecifierOpt **so = dst;
506             int i, *count = (int*)(so + 1);
507             for (i = 0; i < *count; i++) {
508                 av_freep(&(*so)[i].specifier);
509                 if (po->flags & OPT_STRING)
510                     av_freep(&(*so)[i].u.str);
511             }
512             av_freep(so);
513             *count = 0;
514         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
515             av_freep(dst);
516         po++;
517     }
518
519     for (i = 0; i < o->nb_stream_maps; i++)
520         av_freep(&o->stream_maps[i].linklabel);
521     av_freep(&o->stream_maps);
522     av_freep(&o->audio_channel_maps);
523     av_freep(&o->streamid_map);
524
525     memset(o, 0, sizeof(*o));
526
527     if(is_input) o->recording_time = bak.recording_time;
528     else         o->recording_time = INT64_MAX;
529     o->mux_max_delay  = 0.7;
530     o->limit_filesize = UINT64_MAX;
531     o->chapters_input_file = INT_MAX;
532
533     uninit_opts();
534     init_opts();
535 }
536
537 static int alloc_buffer(InputStream *ist, AVCodecContext *s, FrameBuffer **pbuf)
538 {
539     FrameBuffer  *buf = av_mallocz(sizeof(*buf));
540     int i, ret;
541     const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
542     int h_chroma_shift, v_chroma_shift;
543     int edge = 32; // XXX should be avcodec_get_edge_width(), but that fails on svq1
544     int w = s->width, h = s->height;
545
546     if (!buf)
547         return AVERROR(ENOMEM);
548
549     avcodec_align_dimensions(s, &w, &h);
550
551     if (!(s->flags & CODEC_FLAG_EMU_EDGE)) {
552         w += 2*edge;
553         h += 2*edge;
554     }
555
556     if ((ret = av_image_alloc(buf->base, buf->linesize, w, h,
557                               s->pix_fmt, 32)) < 0) {
558         av_freep(&buf);
559         return ret;
560     }
561     /* XXX this shouldn't be needed, but some tests break without this line
562      * those decoders are buggy and need to be fixed.
563      * the following tests fail:
564      * cdgraphics, ansi, aasc, fraps-v1, qtrle-1bit
565      */
566     memset(buf->base[0], 128, ret);
567
568     avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
569     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
570         const int h_shift = i==0 ? 0 : h_chroma_shift;
571         const int v_shift = i==0 ? 0 : v_chroma_shift;
572         if ((s->flags & CODEC_FLAG_EMU_EDGE) || !buf->linesize[1] || !buf->base[i])
573             buf->data[i] = buf->base[i];
574         else
575             buf->data[i] = buf->base[i] +
576                            FFALIGN((buf->linesize[i]*edge >> v_shift) +
577                                    (pixel_size*edge >> h_shift), 32);
578     }
579     buf->w       = s->width;
580     buf->h       = s->height;
581     buf->pix_fmt = s->pix_fmt;
582     buf->ist     = ist;
583
584     *pbuf = buf;
585     return 0;
586 }
587
588 static void free_buffer_pool(InputStream *ist)
589 {
590     FrameBuffer *buf = ist->buffer_pool;
591     while (buf) {
592         ist->buffer_pool = buf->next;
593         av_freep(&buf->base[0]);
594         av_free(buf);
595         buf = ist->buffer_pool;
596     }
597 }
598
599 static void unref_buffer(InputStream *ist, FrameBuffer *buf)
600 {
601     av_assert0(buf->refcount > 0);
602     buf->refcount--;
603     if (!buf->refcount) {
604         FrameBuffer *tmp;
605         for(tmp= ist->buffer_pool; tmp; tmp= tmp->next)
606             av_assert1(tmp != buf);
607         buf->next = ist->buffer_pool;
608         ist->buffer_pool = buf;
609     }
610 }
611
612 static int codec_get_buffer(AVCodecContext *s, AVFrame *frame)
613 {
614     InputStream *ist = s->opaque;
615     FrameBuffer *buf;
616     int ret, i;
617
618     if(av_image_check_size(s->width, s->height, 0, s) || s->pix_fmt<0)
619         return -1;
620
621     if (!ist->buffer_pool && (ret = alloc_buffer(ist, s, &ist->buffer_pool)) < 0)
622         return ret;
623
624     buf              = ist->buffer_pool;
625     ist->buffer_pool = buf->next;
626     buf->next        = NULL;
627     if (buf->w != s->width || buf->h != s->height || buf->pix_fmt != s->pix_fmt) {
628         av_freep(&buf->base[0]);
629         av_free(buf);
630         if ((ret = alloc_buffer(ist, s, &buf)) < 0)
631             return ret;
632     }
633     av_assert0(!buf->refcount);
634     buf->refcount++;
635
636     frame->opaque        = buf;
637     frame->type          = FF_BUFFER_TYPE_USER;
638     frame->extended_data = frame->data;
639     frame->pkt_pts       = s->pkt ? s->pkt->pts : AV_NOPTS_VALUE;
640     frame->width         = buf->w;
641     frame->height        = buf->h;
642     frame->format        = buf->pix_fmt;
643     frame->sample_aspect_ratio = s->sample_aspect_ratio;
644
645     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
646         frame->base[i]     = buf->base[i];  // XXX h264.c uses base though it shouldn't
647         frame->data[i]     = buf->data[i];
648         frame->linesize[i] = buf->linesize[i];
649     }
650
651     return 0;
652 }
653
654 static void codec_release_buffer(AVCodecContext *s, AVFrame *frame)
655 {
656     InputStream *ist = s->opaque;
657     FrameBuffer *buf = frame->opaque;
658     int i;
659
660     if(frame->type!=FF_BUFFER_TYPE_USER)
661         return avcodec_default_release_buffer(s, frame);
662
663     for (i = 0; i < FF_ARRAY_ELEMS(frame->data); i++)
664         frame->data[i] = NULL;
665
666     unref_buffer(ist, buf);
667 }
668
669 static void filter_release_buffer(AVFilterBuffer *fb)
670 {
671     FrameBuffer *buf = fb->priv;
672     av_free(fb);
673     unref_buffer(buf->ist, buf);
674 }
675
676 static enum PixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum PixelFormat target)
677 {
678     if (codec && codec->pix_fmts) {
679         const enum PixelFormat *p = codec->pix_fmts;
680         int has_alpha= av_pix_fmt_descriptors[target].nb_components % 2 == 0;
681         enum PixelFormat best= PIX_FMT_NONE;
682         if (st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
683             if (st->codec->codec_id == CODEC_ID_MJPEG) {
684                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
685             } else if (st->codec->codec_id == CODEC_ID_LJPEG) {
686                 p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
687                                                  PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
688             }
689         }
690         for (; *p != PIX_FMT_NONE; p++) {
691             best= avcodec_find_best_pix_fmt2(best, *p, target, has_alpha, NULL);
692             if (*p == target)
693                 break;
694         }
695         if (*p == PIX_FMT_NONE) {
696             if (target != PIX_FMT_NONE)
697                 av_log(NULL, AV_LOG_WARNING,
698                        "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
699                        av_pix_fmt_descriptors[target].name,
700                        codec->name,
701                        av_pix_fmt_descriptors[best].name);
702             return best;
703         }
704     }
705     return target;
706 }
707
708 static const enum PixelFormat *choose_pixel_fmts(OutputStream *ost)
709 {
710     if (ost->st->codec->pix_fmt != PIX_FMT_NONE) {
711         ost->pix_fmts[0] = choose_pixel_fmt(ost->st, ost->enc, ost->st->codec->pix_fmt);
712         return ost->pix_fmts;
713     } else if (ost->enc->pix_fmts) {
714         if (ost->st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
715             if (ost->st->codec->codec_id == CODEC_ID_MJPEG) {
716                 return (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
717             } else if (ost->st->codec->codec_id == CODEC_ID_LJPEG) {
718                 return (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
719                                                     PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
720             }
721         }
722         return ost->enc->pix_fmts;
723     } else
724         return NULL;
725 }
726
727 static int configure_video_filters(FilterGraph *fg)
728 {
729     InputStream  *ist = fg->inputs[0]->ist;
730     OutputStream *ost = fg->outputs[0]->ost;
731     AVFilterContext *last_filter, *filter;
732     /** filter graph containing all filters including input & output */
733     AVCodecContext *codec = ost->st->codec;
734     enum PixelFormat *pix_fmts = choose_pixel_fmts(ost);
735     AVBufferSinkParams *buffersink_params = av_buffersink_params_alloc();
736     AVRational sample_aspect_ratio;
737     char args[255];
738     int ret;
739
740     avfilter_graph_free(&fg->graph);
741     fg->graph = avfilter_graph_alloc();
742     if (!fg->graph)
743         return AVERROR(ENOMEM);
744
745     if (ist->st->sample_aspect_ratio.num) {
746         sample_aspect_ratio = ist->st->sample_aspect_ratio;
747     } else
748         sample_aspect_ratio = ist->st->codec->sample_aspect_ratio;
749
750     snprintf(args, 255, "%d:%d:%d:%d:%d:%d:%d:flags=%d", ist->st->codec->width,
751              ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
752              sample_aspect_ratio.num, sample_aspect_ratio.den, SWS_BILINEAR + ((ist->st->codec->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
753
754     ret = avfilter_graph_create_filter(&fg->inputs[0]->filter,
755                                        avfilter_get_by_name("buffer"),
756                                        "src", args, NULL, fg->graph);
757     if (ret < 0)
758         return ret;
759
760 #if FF_API_OLD_VSINK_API
761     ret = avfilter_graph_create_filter(&fg->outputs[0]->filter, avfilter_get_by_name("buffersink"),
762                                        "out", NULL, pix_fmts, fg->graph);
763 #else
764     buffersink_params->pixel_fmts = pix_fmts;
765     ret = avfilter_graph_create_filter(&fg->outputs[0]->filter, avfilter_get_by_name("buffersink"),
766                                        "out", NULL, buffersink_params, fg->graph);
767 #endif
768     av_freep(&buffersink_params);
769
770     if (ret < 0)
771         return ret;
772     last_filter = fg->inputs[0]->filter;
773
774     if (codec->width || codec->height) {
775         snprintf(args, 255, "%d:%d:flags=0x%X",
776                  codec->width,
777                  codec->height,
778                  (unsigned)ost->sws_flags);
779         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
780                                                 NULL, args, NULL, fg->graph)) < 0)
781             return ret;
782         if ((ret = avfilter_link(last_filter, 0, filter, 0)) < 0)
783             return ret;
784         last_filter = filter;
785     }
786
787     snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
788     fg->graph->scale_sws_opts = av_strdup(args);
789
790     if (ost->avfilter) {
791         AVFilterInOut *outputs = avfilter_inout_alloc();
792         AVFilterInOut *inputs  = avfilter_inout_alloc();
793
794         outputs->name    = av_strdup("in");
795         outputs->filter_ctx = last_filter;
796         outputs->pad_idx = 0;
797         outputs->next    = NULL;
798
799         inputs->name    = av_strdup("out");
800         inputs->filter_ctx = fg->outputs[0]->filter;
801         inputs->pad_idx = 0;
802         inputs->next    = NULL;
803
804         if ((ret = avfilter_graph_parse(fg->graph, ost->avfilter, &inputs, &outputs, NULL)) < 0)
805             return ret;
806         av_freep(&ost->avfilter);
807     } else {
808         if ((ret = avfilter_link(last_filter, 0, fg->outputs[0]->filter, 0)) < 0)
809             return ret;
810     }
811
812     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
813         return ret;
814
815     ost->filter = fg->outputs[0];
816
817     return 0;
818 }
819
820 static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
821 {
822     FilterGraph *fg = av_mallocz(sizeof(*fg));
823
824     if (!fg)
825         exit_program(1);
826     fg->index = nb_filtergraphs;
827
828     fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
829                              fg->nb_outputs + 1);
830     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
831         exit_program(1);
832     fg->outputs[0]->ost   = ost;
833     fg->outputs[0]->graph = fg;
834
835     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
836                             fg->nb_inputs + 1);
837     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
838         exit_program(1);
839     fg->inputs[0]->ist   = ist;
840     fg->inputs[0]->graph = fg;
841
842     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
843                               &ist->nb_filters, ist->nb_filters + 1);
844     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
845
846     filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
847                               &nb_filtergraphs, nb_filtergraphs + 1);
848     filtergraphs[nb_filtergraphs - 1] = fg;
849
850     return fg;
851 }
852
853 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
854 {
855     InputStream *ist;
856     enum AVMediaType type = in->filter_ctx->input_pads[in->pad_idx].type;
857     int i;
858
859     // TODO: support other filter types
860     if (type != AVMEDIA_TYPE_VIDEO) {
861         av_log(NULL, AV_LOG_FATAL, "Only video filters supported currently.\n");
862         exit_program(1);
863     }
864
865     if (in->name) {
866         AVFormatContext *s;
867         AVStream       *st = NULL;
868         char *p;
869         int file_idx = strtol(in->name, &p, 0);
870
871         if (file_idx < 0 || file_idx >= nb_input_files) {
872             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
873                    file_idx, fg->graph_desc);
874             exit_program(1);
875         }
876         s = input_files[file_idx]->ctx;
877
878         for (i = 0; i < s->nb_streams; i++) {
879             if (s->streams[i]->codec->codec_type != type)
880                 continue;
881             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
882                 st = s->streams[i];
883                 break;
884             }
885         }
886         if (!st) {
887             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
888                    "matches no streams.\n", p, fg->graph_desc);
889             exit_program(1);
890         }
891         ist = input_streams[input_files[file_idx]->ist_index + st->index];
892     } else {
893         /* find the first unused stream of corresponding type */
894         for (i = 0; i < nb_input_streams; i++) {
895             ist = input_streams[i];
896             if (ist->st->codec->codec_type == type && ist->discard)
897                 break;
898         }
899         if (i == nb_input_streams) {
900             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
901                    "unlabeled input pad %d on filter %s", in->pad_idx,
902                    in->filter_ctx->name);
903             exit_program(1);
904         }
905     }
906     ist->discard         = 0;
907     ist->decoding_needed = 1;
908     ist->st->discard = AVDISCARD_NONE;
909
910     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
911                             &fg->nb_inputs, fg->nb_inputs + 1);
912     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
913         exit_program(1);
914     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
915     fg->inputs[fg->nb_inputs - 1]->graph = fg;
916
917     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
918                               &ist->nb_filters, ist->nb_filters + 1);
919     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
920 }
921
922 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
923 {
924     AVCodecContext *codec = ofilter->ost->st->codec;
925     AVFilterContext *last_filter = out->filter_ctx;
926     int pad_idx = out->pad_idx;
927     int ret;
928     enum PixelFormat *pix_fmts = choose_pixel_fmts(ofilter->ost);
929     AVBufferSinkParams *buffersink_params = av_buffersink_params_alloc();
930
931 #if FF_API_OLD_VSINK_API
932     ret = avfilter_graph_create_filter(&ofilter->filter, avfilter_get_by_name("buffersink"),
933                                        "out", NULL, pix_fmts, fg->graph);
934 #else
935     buffersink_params->pixel_fmts = pix_fmts;
936     ret = avfilter_graph_create_filter(&ofilter->filter, avfilter_get_by_name("buffersink"),
937                                        "out", NULL, buffersink_params, fg->graph);
938 #endif
939     av_freep(&buffersink_params);
940
941     if (ret < 0)
942         return ret;
943
944     if (codec->width || codec->height) {
945         char args[255];
946         snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
947                  codec->width,
948                  codec->height,
949                  (unsigned)ofilter->ost->sws_flags);
950         if ((ret = avfilter_graph_create_filter(&last_filter, avfilter_get_by_name("scale"),
951                                                 NULL, args, NULL, fg->graph)) < 0)
952             return ret;
953         if ((ret = avfilter_link(out->filter_ctx, out->pad_idx, last_filter, 0)) < 0)
954             return ret;
955         pad_idx = 0;
956     }
957
958     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
959         return ret;
960
961     return 0;
962 }
963
964 static int configure_complex_filter(FilterGraph *fg)
965 {
966     AVFilterInOut *inputs, *outputs, *cur;
967     int ret, i, init = !fg->graph;
968
969     avfilter_graph_free(&fg->graph);
970     if (!(fg->graph = avfilter_graph_alloc()))
971         return AVERROR(ENOMEM);
972
973     if ((ret = avfilter_graph_parse2(fg->graph, fg->graph_desc, &inputs, &outputs)) < 0)
974         return ret;
975
976     for (cur = inputs; init && cur; cur = cur->next)
977         init_input_filter(fg, cur);
978
979     for (cur = inputs, i = 0; cur; cur = cur->next, i++) {
980         InputFilter *ifilter = fg->inputs[i];
981         InputStream     *ist = ifilter->ist;
982         AVRational       sar;
983         char            args[255];
984
985         sar = ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
986                                                  ist->st->codec->sample_aspect_ratio;
987         snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
988                  ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
989                  sar.num, sar.den);
990
991         if ((ret = avfilter_graph_create_filter(&ifilter->filter,
992                                                 avfilter_get_by_name("buffer"), cur->name,
993                                                 args, NULL, fg->graph)) < 0)
994             return ret;
995         if ((ret = avfilter_link(ifilter->filter, 0,
996                                  cur->filter_ctx, cur->pad_idx)) < 0)
997             return ret;
998     }
999     avfilter_inout_free(&inputs);
1000
1001     if (!init) {
1002         /* we already know the mappings between lavfi outputs and output streams,
1003          * so we can finish the setup */
1004         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1005             configure_output_filter(fg, fg->outputs[i], cur);
1006         avfilter_inout_free(&outputs);
1007
1008         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1009             return ret;
1010     } else {
1011         /* wait until output mappings are processed */
1012         for (cur = outputs; cur;) {
1013             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
1014                                      &fg->nb_outputs, fg->nb_outputs + 1);
1015             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
1016                 exit_program(1);
1017             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
1018             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
1019             cur = cur->next;
1020             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
1021         }
1022     }
1023
1024     return 0;
1025 }
1026
1027 static int configure_complex_filters(void)
1028 {
1029     int i, ret = 0;
1030
1031     for (i = 0; i < nb_filtergraphs; i++)
1032         if (!filtergraphs[i]->graph &&
1033             (ret = configure_complex_filter(filtergraphs[i])) < 0)
1034             return ret;
1035     return 0;
1036 }
1037
1038 static int configure_filtergraph(FilterGraph *fg)
1039 {
1040     return fg->graph_desc ? configure_complex_filter(fg) : configure_video_filters(fg);
1041 }
1042
1043 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1044 {
1045     int i;
1046     for (i = 0; i < fg->nb_inputs; i++)
1047         if (fg->inputs[i]->ist == ist)
1048             return 1;
1049     return 0;
1050 }
1051
1052 static void term_exit(void)
1053 {
1054     av_log(NULL, AV_LOG_QUIET, "%s", "");
1055 #if HAVE_TERMIOS_H
1056     if(restore_tty)
1057         tcsetattr (0, TCSANOW, &oldtty);
1058 #endif
1059 }
1060
1061 static volatile int received_sigterm = 0;
1062
1063 static void sigterm_handler(int sig)
1064 {
1065     received_sigterm = sig;
1066     received_nb_signals++;
1067     term_exit();
1068     if(received_nb_signals > 3)
1069         exit(123);
1070 }
1071
1072 static void term_init(void)
1073 {
1074 #if HAVE_TERMIOS_H
1075     if(!run_as_daemon){
1076         struct termios tty;
1077
1078         if (tcgetattr (0, &tty) == 0) {
1079             oldtty = tty;
1080             restore_tty = 1;
1081             atexit(term_exit);
1082
1083             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1084                              |INLCR|IGNCR|ICRNL|IXON);
1085             tty.c_oflag |= OPOST;
1086             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1087             tty.c_cflag &= ~(CSIZE|PARENB);
1088             tty.c_cflag |= CS8;
1089             tty.c_cc[VMIN] = 1;
1090             tty.c_cc[VTIME] = 0;
1091
1092             tcsetattr (0, TCSANOW, &tty);
1093         }
1094         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
1095     }
1096 #endif
1097     avformat_network_deinit();
1098
1099     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1100     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1101 #ifdef SIGXCPU
1102     signal(SIGXCPU, sigterm_handler);
1103 #endif
1104 }
1105
1106 /* read a key without blocking */
1107 static int read_key(void)
1108 {
1109     unsigned char ch;
1110 #if HAVE_TERMIOS_H
1111     int n = 1;
1112     struct timeval tv;
1113     fd_set rfds;
1114
1115     FD_ZERO(&rfds);
1116     FD_SET(0, &rfds);
1117     tv.tv_sec = 0;
1118     tv.tv_usec = 0;
1119     n = select(1, &rfds, NULL, NULL, &tv);
1120     if (n > 0) {
1121         n = read(0, &ch, 1);
1122         if (n == 1)
1123             return ch;
1124
1125         return n;
1126     }
1127 #elif HAVE_KBHIT
1128 #    if HAVE_PEEKNAMEDPIPE
1129     static int is_pipe;
1130     static HANDLE input_handle;
1131     DWORD dw, nchars;
1132     if(!input_handle){
1133         input_handle = GetStdHandle(STD_INPUT_HANDLE);
1134         is_pipe = !GetConsoleMode(input_handle, &dw);
1135     }
1136
1137     if (stdin->_cnt > 0) {
1138         read(0, &ch, 1);
1139         return ch;
1140     }
1141     if (is_pipe) {
1142         /* When running under a GUI, you will end here. */
1143         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL))
1144             return -1;
1145         //Read it
1146         if(nchars != 0) {
1147             read(0, &ch, 1);
1148             return ch;
1149         }else{
1150             return -1;
1151         }
1152     }
1153 #    endif
1154     if(kbhit())
1155         return(getch());
1156 #endif
1157     return -1;
1158 }
1159
1160 static int decode_interrupt_cb(void *ctx)
1161 {
1162     return received_nb_signals > 1;
1163 }
1164
1165 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1166
1167 void av_noreturn exit_program(int ret)
1168 {
1169     int i, j;
1170
1171     for (i = 0; i < nb_filtergraphs; i++) {
1172         avfilter_graph_free(&filtergraphs[i]->graph);
1173         for (j = 0; j < filtergraphs[i]->nb_inputs; j++)
1174             av_freep(&filtergraphs[i]->inputs[j]);
1175         av_freep(&filtergraphs[i]->inputs);
1176         for (j = 0; j < filtergraphs[i]->nb_outputs; j++)
1177             av_freep(&filtergraphs[i]->outputs[j]);
1178         av_freep(&filtergraphs[i]->outputs);
1179         av_freep(&filtergraphs[i]);
1180     }
1181     av_freep(&filtergraphs);
1182
1183     /* close files */
1184     for (i = 0; i < nb_output_files; i++) {
1185         AVFormatContext *s = output_files[i]->ctx;
1186         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1187             avio_close(s->pb);
1188         avformat_free_context(s);
1189         av_dict_free(&output_files[i]->opts);
1190         av_freep(&output_files[i]);
1191     }
1192     for (i = 0; i < nb_output_streams; i++) {
1193         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1194         while (bsfc) {
1195             AVBitStreamFilterContext *next = bsfc->next;
1196             av_bitstream_filter_close(bsfc);
1197             bsfc = next;
1198         }
1199         output_streams[i]->bitstream_filters = NULL;
1200
1201         if (output_streams[i]->output_frame) {
1202             AVFrame *frame = output_streams[i]->output_frame;
1203             if (frame->extended_data != frame->data)
1204                 av_freep(&frame->extended_data);
1205             av_freep(&frame);
1206         }
1207         av_freep(&output_streams[i]->filtered_frame);
1208         av_freep(&output_streams[i]);
1209     }
1210     for (i = 0; i < nb_input_files; i++) {
1211         avformat_close_input(&input_files[i]->ctx);
1212         av_freep(&input_files[i]);
1213     }
1214     for (i = 0; i < nb_input_streams; i++) {
1215         av_freep(&input_streams[i]->decoded_frame);
1216         av_dict_free(&input_streams[i]->opts);
1217         free_buffer_pool(input_streams[i]);
1218         av_freep(&input_streams[i]->filters);
1219         av_freep(&input_streams[i]);
1220     }
1221
1222     if (vstats_file)
1223         fclose(vstats_file);
1224     av_free(vstats_filename);
1225
1226     av_freep(&input_streams);
1227     av_freep(&input_files);
1228     av_freep(&output_streams);
1229     av_freep(&output_files);
1230
1231     uninit_opts();
1232     av_freep(&audio_buf);
1233     allocated_audio_buf_size = 0;
1234     av_freep(&async_buf);
1235     allocated_async_buf_size = 0;
1236
1237     avfilter_uninit();
1238     avformat_network_deinit();
1239
1240     if (received_sigterm) {
1241         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1242                (int) received_sigterm);
1243         exit (255);
1244     }
1245
1246     exit(ret); /* not all OS-es handle main() return value */
1247 }
1248
1249 static void assert_avoptions(AVDictionary *m)
1250 {
1251     AVDictionaryEntry *t;
1252     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1253         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1254         exit_program(1);
1255     }
1256 }
1257
1258 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1259 {
1260     const char *codec_string = encoder ? "encoder" : "decoder";
1261     AVCodec *codec;
1262     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1263         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1264         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1265                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1266                 codec_string, c->codec->name);
1267         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1268         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1269             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1270                    codec_string, codec->name);
1271         exit_program(1);
1272     }
1273 }
1274
1275 static void choose_sample_fmt(AVStream *st, AVCodec *codec)
1276 {
1277     if (codec && codec->sample_fmts) {
1278         const enum AVSampleFormat *p = codec->sample_fmts;
1279         for (; *p != -1; p++) {
1280             if (*p == st->codec->sample_fmt)
1281                 break;
1282         }
1283         if (*p == -1) {
1284             if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
1285                 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
1286             if(av_get_sample_fmt_name(st->codec->sample_fmt))
1287             av_log(NULL, AV_LOG_WARNING,
1288                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
1289                    av_get_sample_fmt_name(st->codec->sample_fmt),
1290                    codec->name,
1291                    av_get_sample_fmt_name(codec->sample_fmts[0]));
1292             st->codec->sample_fmt = codec->sample_fmts[0];
1293         }
1294     }
1295 }
1296
1297 static void choose_sample_rate(AVStream *st, AVCodec *codec)
1298 {
1299     if (codec && codec->supported_samplerates) {
1300         const int *p  = codec->supported_samplerates;
1301         int best      = 0;
1302         int best_dist = INT_MAX;
1303         for (; *p; p++) {
1304             int dist = abs(st->codec->sample_rate - *p);
1305             if (dist < best_dist) {
1306                 best_dist = dist;
1307                 best      = *p;
1308             }
1309         }
1310         if (best_dist) {
1311             int i;
1312             const int *sample_rates = codec->supported_samplerates;
1313             av_log(st->codec, AV_LOG_WARNING,
1314                    "Requested sampling rate (%dHz) unsupported, using %dHz instead\n"
1315                    "Available sampling rates for %s:",
1316                    st->codec->sample_rate, best, codec->name);
1317             for (i = 0; sample_rates[i]; i++) {
1318                 if (!sample_rates[i + 1]) av_log(st->codec, AV_LOG_WARNING, " and");
1319                 else if (i)               av_log(st->codec, AV_LOG_WARNING, ",");
1320                 av_log(st->codec, AV_LOG_WARNING, " %d", sample_rates[i]);
1321             }
1322             av_log(st->codec, AV_LOG_WARNING, ".\n");
1323         }
1324         st->codec->sample_rate = best;
1325     }
1326 }
1327
1328 static double
1329 get_sync_ipts(const OutputStream *ost, int64_t pts)
1330 {
1331     OutputFile *of = output_files[ost->file_index];
1332     return (double)(pts - of->start_time) / AV_TIME_BASE;
1333 }
1334
1335 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1336 {
1337     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1338     AVCodecContext          *avctx = ost->st->codec;
1339     int ret;
1340
1341     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
1342         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
1343         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1344
1345     /*
1346      * Audio encoders may split the packets --  #frames in != #packets out.
1347      * But there is no reordering, so we can limit the number of output packets
1348      * by simply dropping them here.
1349      * Counting encoded video frames needs to be done separately because of
1350      * reordering, see do_video_out()
1351      */
1352     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1353         if (ost->frame_number >= ost->max_frames) {
1354             av_free_packet(pkt);
1355             return;
1356         }
1357         ost->frame_number++;
1358     }
1359
1360     while (bsfc) {
1361         AVPacket new_pkt = *pkt;
1362         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1363                                            &new_pkt.data, &new_pkt.size,
1364                                            pkt->data, pkt->size,
1365                                            pkt->flags & AV_PKT_FLAG_KEY);
1366         if (a > 0) {
1367             av_free_packet(pkt);
1368             new_pkt.destruct = av_destruct_packet;
1369         } else if (a < 0) {
1370             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
1371                    bsfc->filter->name, pkt->stream_index,
1372                    avctx->codec ? avctx->codec->name : "copy");
1373             print_error("", a);
1374             if (exit_on_error)
1375                 exit_program(1);
1376         }
1377         *pkt = new_pkt;
1378
1379         bsfc = bsfc->next;
1380     }
1381
1382     pkt->stream_index = ost->index;
1383     ret = av_interleaved_write_frame(s, pkt);
1384     if (ret < 0) {
1385         print_error("av_interleaved_write_frame()", ret);
1386         exit_program(1);
1387     }
1388 }
1389
1390 static void get_default_channel_layouts(OutputStream *ost, InputStream *ist)
1391 {
1392     char layout_name[256];
1393     AVCodecContext *enc = ost->st->codec;
1394     AVCodecContext *dec = ist->st->codec;
1395
1396     if (dec->channel_layout &&
1397         av_get_channel_layout_nb_channels(dec->channel_layout) != dec->channels) {
1398         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1399                                      dec->channels, dec->channel_layout);
1400         av_log(NULL, AV_LOG_ERROR, "New channel layout (%s) is invalid\n",
1401                layout_name);
1402         dec->channel_layout = 0;
1403     }
1404     if (!dec->channel_layout) {
1405         if (enc->channel_layout && dec->channels == enc->channels) {
1406             dec->channel_layout = enc->channel_layout;
1407         } else {
1408             dec->channel_layout = av_get_default_channel_layout(dec->channels);
1409
1410             if (!dec->channel_layout) {
1411                 av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1412                        "layout for Input Stream #%d.%d\n", ist->file_index,
1413                        ist->st->index);
1414                 exit_program(1);
1415             }
1416         }
1417         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1418                                      dec->channels, dec->channel_layout);
1419         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1420                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1421     }
1422     if (!enc->channel_layout) {
1423         if (dec->channels == enc->channels) {
1424             enc->channel_layout = dec->channel_layout;
1425             return;
1426         } else {
1427             enc->channel_layout = av_get_default_channel_layout(enc->channels);
1428         }
1429         if (!enc->channel_layout) {
1430             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel layout "
1431                    "for Output Stream #%d.%d\n", ost->file_index,
1432                    ost->st->index);
1433             exit_program(1);
1434         }
1435         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1436                                      enc->channels, enc->channel_layout);
1437         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for Output Stream "
1438                "#%d.%d : %s\n", ost->file_index, ost->st->index, layout_name);
1439     }
1440 }
1441
1442 static void generate_silence(uint8_t* buf, enum AVSampleFormat sample_fmt, size_t size)
1443 {
1444     int fill_char = 0x00;
1445     if (sample_fmt == AV_SAMPLE_FMT_U8)
1446         fill_char = 0x80;
1447     memset(buf, fill_char, size);
1448 }
1449
1450 static int encode_audio_frame(AVFormatContext *s, OutputStream *ost,
1451                               const uint8_t *buf, int buf_size)
1452 {
1453     AVCodecContext *enc = ost->st->codec;
1454     AVFrame *frame = NULL;
1455     AVPacket pkt;
1456     int ret, got_packet;
1457
1458     av_init_packet(&pkt);
1459     pkt.data = NULL;
1460     pkt.size = 0;
1461
1462     if (buf && buf_size) {
1463         if (!ost->output_frame) {
1464             ost->output_frame = avcodec_alloc_frame();
1465             if (!ost->output_frame) {
1466                 av_log(NULL, AV_LOG_FATAL, "out-of-memory in encode_audio_frame()\n");
1467                 exit_program(1);
1468             }
1469         }
1470         frame = ost->output_frame;
1471         if (frame->extended_data != frame->data)
1472             av_freep(&frame->extended_data);
1473         avcodec_get_frame_defaults(frame);
1474
1475         frame->nb_samples  = buf_size /
1476                              (enc->channels * av_get_bytes_per_sample(enc->sample_fmt));
1477         if ((ret = avcodec_fill_audio_frame(frame, enc->channels, enc->sample_fmt,
1478                                             buf, buf_size, 1)) < 0) {
1479             av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_fill_audio_frame)\n");
1480             exit_program(1);
1481         }
1482
1483         frame->pts = ost->sync_opts;
1484         ost->sync_opts += frame->nb_samples;
1485     }
1486
1487     got_packet = 0;
1488     update_benchmark(NULL);
1489     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1490         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
1491         exit_program(1);
1492     }
1493     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
1494
1495     ret = pkt.size;
1496
1497     if (got_packet) {
1498         if (pkt.pts != AV_NOPTS_VALUE)
1499             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1500         if (pkt.dts != AV_NOPTS_VALUE) {
1501             int64_t max = ost->st->cur_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
1502             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1503             if (ost->st->cur_dts && ost->st->cur_dts != AV_NOPTS_VALUE &&  max > pkt.dts) {
1504                 av_log(s, max - pkt.dts > 2 ? AV_LOG_WARNING : AV_LOG_DEBUG, "Audio timestamp %"PRId64" < %"PRId64" invalid, cliping\n", pkt.dts, max);
1505                 pkt.pts = pkt.dts = max;
1506             }
1507         }
1508         if (pkt.duration > 0)
1509             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1510
1511         write_frame(s, &pkt, ost);
1512
1513         audio_size += pkt.size;
1514
1515         av_free_packet(&pkt);
1516     }
1517
1518     if (debug_ts) {
1519         av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
1520                "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1521                av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1522                av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1523     }
1524
1525     return ret;
1526 }
1527
1528 static int alloc_audio_output_buf(AVCodecContext *dec, AVCodecContext *enc,
1529                                   int nb_samples, int *buf_linesize)
1530 {
1531     int64_t audio_buf_samples;
1532     int audio_buf_size;
1533
1534     /* calculate required number of samples to allocate */
1535     audio_buf_samples = ((int64_t)nb_samples * enc->sample_rate + dec->sample_rate) /
1536                         dec->sample_rate;
1537     audio_buf_samples = 4 * audio_buf_samples + 10000; // safety factors for resampling
1538     audio_buf_samples = FFMAX(audio_buf_samples, enc->frame_size);
1539     if (audio_buf_samples > INT_MAX)
1540         return AVERROR(EINVAL);
1541
1542     audio_buf_size = av_samples_get_buffer_size(buf_linesize, enc->channels,
1543                                                 audio_buf_samples,
1544                                                 enc->sample_fmt, 0);
1545     if (audio_buf_size < 0)
1546         return audio_buf_size;
1547
1548     av_fast_malloc(&audio_buf, &allocated_audio_buf_size, audio_buf_size);
1549     if (!audio_buf)
1550         return AVERROR(ENOMEM);
1551
1552     return 0;
1553 }
1554
1555 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1556                          InputStream *ist, AVFrame *decoded_frame)
1557 {
1558     uint8_t *buftmp;
1559     int64_t size_out;
1560
1561     int frame_bytes, resample_changed, ret;
1562     AVCodecContext *enc = ost->st->codec;
1563     AVCodecContext *dec = ist->st->codec;
1564     int osize = av_get_bytes_per_sample(enc->sample_fmt);
1565     int isize = av_get_bytes_per_sample(dec->sample_fmt);
1566     uint8_t *buf[AV_NUM_DATA_POINTERS];
1567     int size     = decoded_frame->nb_samples * dec->channels * isize;
1568     int planes   = av_sample_fmt_is_planar(dec->sample_fmt) ? dec->channels : 1;
1569     int i;
1570     int out_linesize = 0;
1571     int buf_linesize = decoded_frame->linesize[0];
1572
1573     av_assert0(planes <= AV_NUM_DATA_POINTERS);
1574
1575     for(i=0; i<planes; i++)
1576         buf[i]= decoded_frame->data[i];
1577
1578
1579     get_default_channel_layouts(ost, ist);
1580
1581     if (alloc_audio_output_buf(dec, enc, decoded_frame->nb_samples, &out_linesize) < 0) {
1582         av_log(NULL, AV_LOG_FATAL, "Error allocating audio buffer\n");
1583         exit_program(1);
1584     }
1585
1586     if (audio_sync_method > 1                      ||
1587         enc->channels       != dec->channels       ||
1588         enc->channel_layout != dec->channel_layout ||
1589         enc->sample_rate    != dec->sample_rate    ||
1590         dec->sample_fmt     != enc->sample_fmt)
1591         ost->audio_resample = 1;
1592
1593     resample_changed = ost->resample_sample_fmt  != dec->sample_fmt ||
1594                        ost->resample_channels    != dec->channels   ||
1595                        ost->resample_channel_layout != dec->channel_layout ||
1596                        ost->resample_sample_rate != dec->sample_rate;
1597
1598     if ((ost->audio_resample && !ost->swr) || resample_changed || ost->audio_channels_mapped) {
1599
1600         if (resample_changed) {
1601             av_log(NULL, AV_LOG_INFO, "Input stream #%d:%d frame changed from rate:%d fmt:%s ch:%d chl:0x%"PRIx64" to rate:%d fmt:%s ch:%d chl:0x%"PRIx64"\n",
1602                    ist->file_index, ist->st->index,
1603                    ost->resample_sample_rate, av_get_sample_fmt_name(ost->resample_sample_fmt),
1604                    ost->resample_channels, ost->resample_channel_layout,
1605                    dec->sample_rate, av_get_sample_fmt_name(dec->sample_fmt),
1606                    dec->channels, dec->channel_layout);
1607             ost->resample_sample_fmt  = dec->sample_fmt;
1608             ost->resample_channels    = dec->channels;
1609             ost->resample_channel_layout = dec->channel_layout;
1610             ost->resample_sample_rate = dec->sample_rate;
1611             swr_free(&ost->swr);
1612         }
1613         /* if audio_sync_method is >1 the resampler is needed for audio drift compensation */
1614         if (audio_sync_method <= 1 && !ost->audio_channels_mapped &&
1615             ost->resample_sample_fmt  == enc->sample_fmt &&
1616             ost->resample_channels    == enc->channels   &&
1617             ost->resample_channel_layout == enc->channel_layout &&
1618             ost->resample_sample_rate == enc->sample_rate) {
1619             //ost->swr = NULL;
1620             ost->audio_resample = 0;
1621         } else {
1622             ost->swr = swr_alloc_set_opts(ost->swr,
1623                                           enc->channel_layout, enc->sample_fmt, enc->sample_rate,
1624                                           dec->channel_layout, dec->sample_fmt, dec->sample_rate,
1625                                           0, NULL);
1626             av_opt_set_int(ost->swr, "dither_method", ost->swr_dither_method,0);
1627             av_opt_set_double(ost->swr, "dither_scale", ost->swr_dither_scale,0);
1628             if (ost->audio_channels_mapped)
1629                 swr_set_channel_mapping(ost->swr, ost->audio_channels_map);
1630             av_opt_set_double(ost->swr, "rmvol", ost->rematrix_volume, 0);
1631             if (ost->audio_channels_mapped) {
1632                 av_opt_set_int(ost->swr, "icl", av_get_default_channel_layout(ost->audio_channels_mapped), 0);
1633                 av_opt_set_int(ost->swr, "uch", ost->audio_channels_mapped, 0);
1634             }
1635             if (av_opt_set_int(ost->swr, "ich", dec->channels, 0) < 0) {
1636                 av_log(NULL, AV_LOG_FATAL, "Unsupported number of input channels\n");
1637                 exit_program(1);
1638             }
1639             if (av_opt_set_int(ost->swr, "och", enc->channels, 0) < 0) {
1640                 av_log(NULL, AV_LOG_FATAL, "Unsupported number of output channels\n");
1641                 exit_program(1);
1642             }
1643             if(audio_sync_method>1) av_opt_set_int(ost->swr, "flags", SWR_FLAG_RESAMPLE, 0);
1644             if(ost->swr && swr_init(ost->swr) < 0){
1645                 av_log(NULL, AV_LOG_FATAL, "swr_init() failed\n");
1646                 swr_free(&ost->swr);
1647             }
1648
1649             if (!ost->swr) {
1650                 av_log(NULL, AV_LOG_FATAL, "Can not resample %d channels @ %d Hz to %d channels @ %d Hz\n",
1651                         dec->channels, dec->sample_rate,
1652                         enc->channels, enc->sample_rate);
1653                 exit_program(1);
1654             }
1655         }
1656     }
1657
1658     av_assert0(ost->audio_resample || dec->sample_fmt==enc->sample_fmt);
1659
1660     if (audio_sync_method > 0) {
1661         double delta = get_sync_ipts(ost, ist->pts) * enc->sample_rate - ost->sync_opts -
1662                        av_fifo_size(ost->fifo) / (enc->channels * osize);
1663         int idelta = delta * dec->sample_rate / enc->sample_rate;
1664         int byte_delta = idelta * isize * dec->channels;
1665
1666         // FIXME resample delay
1667         if (fabs(delta) > 50) {
1668             if (ist->is_start || fabs(delta) > audio_drift_threshold*enc->sample_rate) {
1669                 if (byte_delta < 0) {
1670                     byte_delta = FFMAX(byte_delta, -size);
1671                     size += byte_delta;
1672                     for (i=0; i<planes; i++)
1673                         buf[i]  -= byte_delta/planes;
1674                     av_log(NULL, AV_LOG_VERBOSE, "discarding %d audio samples\n",
1675                            -byte_delta / (isize * dec->channels));
1676                     if (!size)
1677                         return;
1678                     ist->is_start = 0;
1679                 } else {
1680                     av_fast_malloc(&async_buf, &allocated_async_buf_size,
1681                                    byte_delta + size);
1682                     if (!async_buf) {
1683                         av_log(NULL, AV_LOG_FATAL, "Out of memory in do_audio_out\n");
1684                         exit_program(1);
1685                     }
1686
1687                     if (alloc_audio_output_buf(dec, enc, decoded_frame->nb_samples + idelta, &out_linesize) < 0) {
1688                         av_log(NULL, AV_LOG_FATAL, "Error allocating audio buffer\n");
1689                         exit_program(1);
1690                     }
1691                     ist->is_start = 0;
1692
1693                     for (i=0; i<planes; i++) {
1694                         uint8_t *t = async_buf + i*((byte_delta + size)/planes);
1695                         generate_silence(t, dec->sample_fmt, byte_delta/planes);
1696                         memcpy(t + byte_delta/planes, buf[i], size/planes);
1697                         buf[i] = t;
1698                     }
1699                     size += byte_delta;
1700                     buf_linesize = allocated_async_buf_size;
1701                     av_log(NULL, AV_LOG_VERBOSE, "adding %d audio samples of silence\n", idelta);
1702                 }
1703             } else if (audio_sync_method > 1) {
1704                 int comp = av_clip(delta, -audio_sync_method, audio_sync_method);
1705                 av_log(NULL, AV_LOG_VERBOSE, "compensating audio timestamp drift:%f compensation:%d in:%d\n",
1706                        delta, comp, enc->sample_rate);
1707 //                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));
1708                 swr_set_compensation(ost->swr, comp, enc->sample_rate);
1709             }
1710         }
1711     } else if (audio_sync_method == 0)
1712         ost->sync_opts = lrintf(get_sync_ipts(ost, ist->pts) * enc->sample_rate) -
1713                                 av_fifo_size(ost->fifo) / (enc->channels * osize); // FIXME wrong
1714
1715     if (ost->audio_resample || ost->audio_channels_mapped) {
1716         buftmp = audio_buf;
1717         size_out = swr_convert(ost->swr, (      uint8_t*[]){buftmp},
1718                                       allocated_audio_buf_size / (enc->channels * osize),
1719                                       buf,
1720                                       size / (dec->channels * isize));
1721         if (size_out < 0) {
1722             av_log(NULL, AV_LOG_FATAL, "swr_convert failed\n");
1723             exit_program(1);
1724         }
1725         size_out = size_out * enc->channels * osize;
1726     } else {
1727         buftmp = buf[0];
1728         size_out = size;
1729     }
1730
1731     av_assert0(ost->audio_resample || dec->sample_fmt==enc->sample_fmt);
1732
1733     /* now encode as many frames as possible */
1734     if (!(enc->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
1735         /* output resampled raw samples */
1736         if (av_fifo_realloc2(ost->fifo, av_fifo_size(ost->fifo) + size_out) < 0) {
1737             av_log(NULL, AV_LOG_FATAL, "av_fifo_realloc2() failed\n");
1738             exit_program(1);
1739         }
1740         av_fifo_generic_write(ost->fifo, buftmp, size_out, NULL);
1741
1742         frame_bytes = enc->frame_size * osize * enc->channels;
1743
1744         while (av_fifo_size(ost->fifo) >= frame_bytes) {
1745             av_fifo_generic_read(ost->fifo, audio_buf, frame_bytes, NULL);
1746             encode_audio_frame(s, ost, audio_buf, frame_bytes);
1747         }
1748     } else {
1749         encode_audio_frame(s, ost, buftmp, size_out);
1750     }
1751 }
1752
1753 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1754 {
1755     AVCodecContext *dec;
1756     AVPicture *picture2;
1757     AVPicture picture_tmp;
1758     uint8_t *buf = 0;
1759
1760     dec = ist->st->codec;
1761
1762     /* deinterlace : must be done before any resize */
1763     if (do_deinterlace) {
1764         int size;
1765
1766         /* create temporary picture */
1767         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1768         buf  = av_malloc(size);
1769         if (!buf)
1770             return;
1771
1772         picture2 = &picture_tmp;
1773         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1774
1775         if (avpicture_deinterlace(picture2, picture,
1776                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1777             /* if error, do not deinterlace */
1778             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1779             av_free(buf);
1780             buf = NULL;
1781             picture2 = picture;
1782         }
1783     } else {
1784         picture2 = picture;
1785     }
1786
1787     if (picture != picture2)
1788         *picture = *picture2;
1789     *bufp = buf;
1790 }
1791
1792 static void do_subtitle_out(AVFormatContext *s,
1793                             OutputStream *ost,
1794                             InputStream *ist,
1795                             AVSubtitle *sub,
1796                             int64_t pts)
1797 {
1798     static uint8_t *subtitle_out = NULL;
1799     int subtitle_out_max_size = 1024 * 1024;
1800     int subtitle_out_size, nb, i;
1801     AVCodecContext *enc;
1802     AVPacket pkt;
1803
1804     if (pts == AV_NOPTS_VALUE) {
1805         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1806         if (exit_on_error)
1807             exit_program(1);
1808         return;
1809     }
1810
1811     enc = ost->st->codec;
1812
1813     if (!subtitle_out) {
1814         subtitle_out = av_malloc(subtitle_out_max_size);
1815     }
1816
1817     /* Note: DVB subtitle need one packet to draw them and one other
1818        packet to clear them */
1819     /* XXX: signal it in the codec context ? */
1820     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1821         nb = 2;
1822     else
1823         nb = 1;
1824
1825     for (i = 0; i < nb; i++) {
1826         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1827
1828         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1829         // start_display_time is required to be 0
1830         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1831         sub->end_display_time  -= sub->start_display_time;
1832         sub->start_display_time = 0;
1833         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1834                                                     subtitle_out_max_size, sub);
1835         if (subtitle_out_size < 0) {
1836             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1837             exit_program(1);
1838         }
1839
1840         av_init_packet(&pkt);
1841         pkt.data = subtitle_out;
1842         pkt.size = subtitle_out_size;
1843         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1844         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1845             /* XXX: the pts correction is handled here. Maybe handling
1846                it in the codec would be better */
1847             if (i == 0)
1848                 pkt.pts += 90 * sub->start_display_time;
1849             else
1850                 pkt.pts += 90 * sub->end_display_time;
1851         }
1852         write_frame(s, &pkt, ost);
1853     }
1854 }
1855
1856 static double psnr(double d)
1857 {
1858     return -10.0 * log(d) / log(10.0);
1859 }
1860
1861 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1862                            int frame_size)
1863 {
1864     AVCodecContext *enc;
1865     int frame_number;
1866     double ti1, bitrate, avg_bitrate;
1867
1868     /* this is executed just the first time do_video_stats is called */
1869     if (!vstats_file) {
1870         vstats_file = fopen(vstats_filename, "w");
1871         if (!vstats_file) {
1872             perror("fopen");
1873             exit_program(1);
1874         }
1875     }
1876
1877     enc = ost->st->codec;
1878     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1879         frame_number = ost->frame_number;
1880         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1881         if (enc->flags&CODEC_FLAG_PSNR)
1882             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1883
1884         fprintf(vstats_file,"f_size= %6d ", frame_size);
1885         /* compute pts value */
1886         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1887         if (ti1 < 0.01)
1888             ti1 = 0.01;
1889
1890         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1891         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1892         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1893                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1894         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1895     }
1896 }
1897
1898
1899 static void do_video_out(AVFormatContext *s, OutputStream *ost,
1900                          AVFrame *in_picture, float quality)
1901 {
1902     int nb_frames, i, ret, format_video_sync;
1903     AVCodecContext *enc;
1904     double sync_ipts, delta;
1905     double duration = 0;
1906     int frame_size = 0;
1907     InputStream *ist = NULL;
1908
1909     if (ost->source_index >= 0)
1910         ist = input_streams[ost->source_index];
1911
1912     enc = ost->st->codec;
1913
1914     if (ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE) {
1915         duration = FFMAX(av_q2d(ist->st->time_base), av_q2d(ist->st->codec->time_base));
1916         if(ist->st->r_frame_rate.num)
1917             duration= FFMAX(duration, 1/av_q2d(ist->st->r_frame_rate));
1918         if(ist->st->avg_frame_rate.num && 0)
1919             duration= FFMAX(duration, 1/av_q2d(ist->st->avg_frame_rate));
1920
1921         duration /= av_q2d(enc->time_base);
1922     }
1923
1924     sync_ipts = get_sync_ipts(ost, in_picture->pts) / av_q2d(enc->time_base);
1925     delta = sync_ipts - ost->sync_opts + duration;
1926
1927     /* by default, we output a single frame */
1928     nb_frames = 1;
1929
1930     format_video_sync = video_sync_method;
1931     if (format_video_sync == VSYNC_AUTO)
1932         format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : 1;
1933
1934     switch (format_video_sync) {
1935     case VSYNC_CFR:
1936         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
1937         if (delta < -1.1)
1938             nb_frames = 0;
1939         else if (delta > 1.1)
1940             nb_frames = lrintf(delta);
1941         break;
1942     case VSYNC_VFR:
1943         if (delta <= -0.6)
1944             nb_frames = 0;
1945         else if (delta > 0.6)
1946             ost->sync_opts = lrintf(sync_ipts);
1947         break;
1948     case VSYNC_DROP:
1949     case VSYNC_PASSTHROUGH:
1950         ost->sync_opts = lrintf(sync_ipts);
1951         break;
1952     default:
1953         av_assert0(0);
1954     }
1955
1956     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
1957     if (nb_frames == 0) {
1958         nb_frames_drop++;
1959         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1960         return;
1961     } else if (nb_frames > 1) {
1962         nb_frames_dup += nb_frames - 1;
1963         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
1964     }
1965
1966     /* duplicates frame if needed */
1967     for (i = 0; i < nb_frames; i++) {
1968         AVPacket pkt;
1969         av_init_packet(&pkt);
1970         pkt.data = NULL;
1971         pkt.size = 0;
1972
1973         if (s->oformat->flags & AVFMT_RAWPICTURE &&
1974             enc->codec->id == CODEC_ID_RAWVIDEO) {
1975             /* raw pictures are written as AVPicture structure to
1976                avoid any copies. We support temporarily the older
1977                method. */
1978             enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1979             enc->coded_frame->top_field_first  = in_picture->top_field_first;
1980             pkt.data   = (uint8_t *)in_picture;
1981             pkt.size   =  sizeof(AVPicture);
1982             pkt.pts    = av_rescale_q(ost->sync_opts, enc->time_base, ost->st->time_base);
1983             pkt.flags |= AV_PKT_FLAG_KEY;
1984
1985             write_frame(s, &pkt, ost);
1986         } else {
1987             int got_packet;
1988             AVFrame big_picture;
1989
1990             big_picture = *in_picture;
1991             /* better than nothing: use input picture interlaced
1992                settings */
1993             big_picture.interlaced_frame = in_picture->interlaced_frame;
1994             if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1995                 if (ost->top_field_first == -1)
1996                     big_picture.top_field_first = in_picture->top_field_first;
1997                 else
1998                     big_picture.top_field_first = !!ost->top_field_first;
1999             }
2000
2001             /* handles same_quant here. This is not correct because it may
2002                not be a global option */
2003             big_picture.quality = quality;
2004             if (!enc->me_threshold)
2005                 big_picture.pict_type = 0;
2006             big_picture.pts = ost->sync_opts;
2007             if (ost->forced_kf_index < ost->forced_kf_count &&
2008                 big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
2009                 big_picture.pict_type = AV_PICTURE_TYPE_I;
2010                 ost->forced_kf_index++;
2011             }
2012             update_benchmark(NULL);
2013             ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
2014             update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
2015             if (ret < 0) {
2016                 av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
2017                 exit_program(1);
2018             }
2019
2020             if (got_packet) {
2021                 if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
2022                     pkt.pts = ost->sync_opts;
2023
2024                 if (pkt.pts != AV_NOPTS_VALUE)
2025                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
2026                 if (pkt.dts != AV_NOPTS_VALUE)
2027                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
2028
2029                 if (debug_ts) {
2030                     av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
2031                            "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
2032                            av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
2033                            av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
2034                 }
2035
2036                 write_frame(s, &pkt, ost);
2037                 frame_size = pkt.size;
2038                 video_size += pkt.size;
2039                 av_free_packet(&pkt);
2040
2041                 /* if two pass, output log */
2042                 if (ost->logfile && enc->stats_out) {
2043                     fprintf(ost->logfile, "%s", enc->stats_out);
2044                 }
2045             }
2046         }
2047         ost->sync_opts++;
2048         /*
2049          * For video, number of frames in == number of packets out.
2050          * But there may be reordering, so we can't throw away frames on encoder
2051          * flush, we need to limit them here, before they go into encoder.
2052          */
2053         ost->frame_number++;
2054     }
2055     if (vstats_filename && frame_size)
2056         do_video_stats(output_files[ost->file_index]->ctx, ost, frame_size);
2057 }
2058
2059 /* check for new output on any of the filtergraphs */
2060 static int poll_filters(void)
2061 {
2062     AVFilterBufferRef *picref;
2063     AVFrame *filtered_frame = NULL;
2064     int i, ret, ret_all;
2065     unsigned nb_success, nb_eof;
2066
2067     while (1) {
2068         /* Reap all buffers present in the buffer sinks */
2069         for (i = 0; i < nb_output_streams; i++) {
2070             OutputStream *ost = output_streams[i];
2071             OutputFile    *of = output_files[ost->file_index];
2072
2073             if (!ost->filter || ost->is_past_recording_time)
2074                 continue;
2075
2076             if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
2077                 return AVERROR(ENOMEM);
2078             } else
2079                 avcodec_get_frame_defaults(ost->filtered_frame);
2080             filtered_frame = ost->filtered_frame;
2081
2082             while (1) {
2083                 AVRational ist_pts_tb = ost->filter->filter->inputs[0]->time_base;
2084                 ret = av_buffersink_get_buffer_ref(ost->filter->filter, &picref,
2085                                                    AV_BUFFERSINK_FLAG_NO_REQUEST);
2086                 if (ret < 0) {
2087                     if (ret != AVERROR(EAGAIN)) {
2088                         char buf[256];
2089                         av_strerror(ret, buf, sizeof(buf));
2090                         av_log(NULL, AV_LOG_WARNING,
2091                                "Error in av_buffersink_get_buffer_ref(): %s\n", buf);
2092                     }
2093                     break;
2094                 }
2095                 filtered_frame->pts = av_rescale_q(picref->pts, ist_pts_tb, AV_TIME_BASE_Q);
2096                 //if (ost->source_index >= 0)
2097                 //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
2098
2099                 if (of->start_time && filtered_frame->pts < of->start_time)
2100                     return 0;
2101
2102                 switch (ost->filter->filter->inputs[0]->type) {
2103                 case AVMEDIA_TYPE_VIDEO:
2104                     avfilter_fill_frame_from_video_buffer_ref(filtered_frame, picref);
2105                     if (!ost->frame_aspect_ratio)
2106                         ost->st->codec->sample_aspect_ratio = picref->video->sample_aspect_ratio;
2107
2108                     do_video_out(of->ctx, ost, filtered_frame,
2109                                  same_quant ? ost->last_quality :
2110                                               ost->st->codec->global_quality);
2111                     break;
2112                 default:
2113                     // TODO support audio/subtitle filters
2114                     av_assert0(0);
2115                 }
2116
2117                 avfilter_unref_buffer(picref);
2118             }
2119         }
2120         /* Request frames through all the graphs */
2121         ret_all = nb_success = nb_eof = 0;
2122         for (i = 0; i < nb_filtergraphs; i++) {
2123             ret = avfilter_graph_request_oldest(filtergraphs[i]->graph);
2124             if (!ret) {
2125                 nb_success++;
2126             } else if (ret == AVERROR_EOF) {
2127                 nb_eof++;
2128             } else if (ret != AVERROR(EAGAIN)) {
2129                 char buf[256];
2130                 av_strerror(ret, buf, sizeof(buf));
2131                 av_log(NULL, AV_LOG_WARNING,
2132                        "Error in request_frame(): %s\n", buf);
2133                 ret_all = ret;
2134             }
2135         }
2136         if (!nb_success)
2137             break;
2138         /* Try again if anything succeeded */
2139     }
2140     return nb_eof == nb_filtergraphs ? AVERROR_EOF : ret_all;
2141 }
2142
2143 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
2144 {
2145     char buf[1024];
2146     OutputStream *ost;
2147     AVFormatContext *oc;
2148     int64_t total_size;
2149     AVCodecContext *enc;
2150     int frame_number, vid, i;
2151     double bitrate;
2152     int64_t pts = INT64_MAX;
2153     static int64_t last_time = -1;
2154     static int qp_histogram[52];
2155     int hours, mins, secs, us;
2156
2157     if (!print_stats && !is_last_report)
2158         return;
2159
2160     if (!is_last_report) {
2161         if (last_time == -1) {
2162             last_time = cur_time;
2163             return;
2164         }
2165         if ((cur_time - last_time) < 500000)
2166             return;
2167         last_time = cur_time;
2168     }
2169
2170
2171     oc = output_files[0]->ctx;
2172
2173     total_size = avio_size(oc->pb);
2174     if (total_size < 0) { // FIXME improve avio_size() so it works with non seekable output too
2175         total_size = avio_tell(oc->pb);
2176         if (total_size < 0)
2177             total_size = 0;
2178     }
2179
2180     buf[0] = '\0';
2181     vid = 0;
2182     for (i = 0; i < nb_output_streams; i++) {
2183         float q = -1;
2184         ost = output_streams[i];
2185         enc = ost->st->codec;
2186         if (!ost->stream_copy && enc->coded_frame)
2187             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
2188         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2189             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
2190         }
2191         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
2192             float fps, t = (cur_time-timer_start) / 1000000.0;
2193
2194             frame_number = ost->frame_number;
2195             fps = t > 1 ? frame_number / t : 0;
2196             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
2197                      frame_number, fps < 9.95, fps, q);
2198             if (is_last_report)
2199                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
2200             if (qp_hist) {
2201                 int j;
2202                 int qp = lrintf(q);
2203                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
2204                     qp_histogram[qp]++;
2205                 for (j = 0; j < 32; j++)
2206                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
2207             }
2208             if (enc->flags&CODEC_FLAG_PSNR) {
2209                 int j;
2210                 double error, error_sum = 0;
2211                 double scale, scale_sum = 0;
2212                 char type[3] = { 'Y','U','V' };
2213                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
2214                 for (j = 0; j < 3; j++) {
2215                     if (is_last_report) {
2216                         error = enc->error[j];
2217                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
2218                     } else {
2219                         error = enc->coded_frame->error[j];
2220                         scale = enc->width * enc->height * 255.0 * 255.0;
2221                     }
2222                     if (j)
2223                         scale /= 4;
2224                     error_sum += error;
2225                     scale_sum += scale;
2226                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
2227                 }
2228                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
2229             }
2230             vid = 1;
2231         }
2232         /* compute min output value */
2233         pts = FFMIN(pts, av_rescale_q(ost->st->pts.val,
2234                                       ost->st->time_base, AV_TIME_BASE_Q));
2235     }
2236
2237     secs = pts / AV_TIME_BASE;
2238     us = pts % AV_TIME_BASE;
2239     mins = secs / 60;
2240     secs %= 60;
2241     hours = mins / 60;
2242     mins %= 60;
2243
2244     bitrate = pts ? total_size * 8 / (pts / 1000.0) : 0;
2245
2246     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2247              "size=%8.0fkB time=", total_size / 1024.0);
2248     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2249              "%02d:%02d:%02d.%02d ", hours, mins, secs,
2250              (100 * us) / AV_TIME_BASE);
2251     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
2252              "bitrate=%6.1fkbits/s", bitrate);
2253
2254     if (nb_frames_dup || nb_frames_drop)
2255         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
2256                 nb_frames_dup, nb_frames_drop);
2257
2258     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
2259
2260     fflush(stderr);
2261
2262     if (is_last_report) {
2263         int64_t raw= audio_size + video_size + extra_size;
2264         av_log(NULL, AV_LOG_INFO, "\n");
2265         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
2266                video_size / 1024.0,
2267                audio_size / 1024.0,
2268                extra_size / 1024.0,
2269                100.0 * (total_size - raw) / raw
2270         );
2271         if(video_size + audio_size + extra_size == 0){
2272             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
2273         }
2274     }
2275 }
2276
2277 static void flush_encoders(void)
2278 {
2279     int i, ret;
2280
2281     for (i = 0; i < nb_output_streams; i++) {
2282         OutputStream   *ost = output_streams[i];
2283         AVCodecContext *enc = ost->st->codec;
2284         AVFormatContext *os = output_files[ost->file_index]->ctx;
2285         int stop_encoding = 0;
2286
2287         if (!ost->encoding_needed)
2288             continue;
2289
2290         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
2291             continue;
2292         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
2293             continue;
2294
2295         for (;;) {
2296             AVPacket pkt;
2297             int fifo_bytes, got_packet;
2298             av_init_packet(&pkt);
2299             pkt.data = NULL;
2300             pkt.size = 0;
2301
2302             switch (ost->st->codec->codec_type) {
2303             case AVMEDIA_TYPE_AUDIO:
2304                 fifo_bytes = av_fifo_size(ost->fifo);
2305                 if (fifo_bytes > 0) {
2306                     /* encode any samples remaining in fifo */
2307                     int frame_bytes = fifo_bytes;
2308
2309                     av_fifo_generic_read(ost->fifo, audio_buf, fifo_bytes, NULL);
2310
2311                     /* pad last frame with silence if needed */
2312                     if (!(enc->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME)) {
2313                         frame_bytes = enc->frame_size * enc->channels *
2314                                       av_get_bytes_per_sample(enc->sample_fmt);
2315                         if (allocated_audio_buf_size < frame_bytes)
2316                             exit_program(1);
2317                         generate_silence(audio_buf+fifo_bytes, enc->sample_fmt, frame_bytes - fifo_bytes);
2318                     }
2319                     encode_audio_frame(os, ost, audio_buf, frame_bytes);
2320                 } else {
2321                     /* flush encoder with NULL frames until it is done
2322                        returning packets */
2323                     if (encode_audio_frame(os, ost, NULL, 0) == 0) {
2324                         stop_encoding = 1;
2325                         break;
2326                     }
2327                 }
2328                 break;
2329             case AVMEDIA_TYPE_VIDEO:
2330                 update_benchmark(NULL);
2331                 ret = avcodec_encode_video2(enc, &pkt, NULL, &got_packet);
2332                 update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
2333                 if (ret < 0) {
2334                     av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
2335                     exit_program(1);
2336                 }
2337                 video_size += pkt.size;
2338                 if (ost->logfile && enc->stats_out) {
2339                     fprintf(ost->logfile, "%s", enc->stats_out);
2340                 }
2341                 if (!got_packet) {
2342                     stop_encoding = 1;
2343                     break;
2344                 }
2345                 if (pkt.pts != AV_NOPTS_VALUE)
2346                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
2347                 if (pkt.dts != AV_NOPTS_VALUE)
2348                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
2349                 write_frame(os, &pkt, ost);
2350                 break;
2351             default:
2352                 stop_encoding = 1;
2353             }
2354             if (stop_encoding)
2355                 break;
2356         }
2357     }
2358 }
2359
2360 /*
2361  * Check whether a packet from ist should be written into ost at this time
2362  */
2363 static int check_output_constraints(InputStream *ist, OutputStream *ost)
2364 {
2365     OutputFile *of = output_files[ost->file_index];
2366     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
2367
2368     if (ost->source_index != ist_index)
2369         return 0;
2370
2371     if (of->start_time && ist->pts < of->start_time)
2372         return 0;
2373
2374     if (of->recording_time != INT64_MAX &&
2375         av_compare_ts(ist->pts, AV_TIME_BASE_Q, of->recording_time + of->start_time,
2376                       (AVRational){ 1, 1000000 }) >= 0) {
2377         ost->is_past_recording_time = 1;
2378         return 0;
2379     }
2380
2381     return 1;
2382 }
2383
2384 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
2385 {
2386     OutputFile *of = output_files[ost->file_index];
2387     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
2388     AVPicture pict;
2389     AVPacket opkt;
2390
2391     av_init_packet(&opkt);
2392
2393     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
2394         !ost->copy_initial_nonkeyframes)
2395         return;
2396
2397     /* force the input stream PTS */
2398     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2399         audio_size += pkt->size;
2400     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2401         video_size += pkt->size;
2402         ost->sync_opts++;
2403     }
2404
2405     if (pkt->pts != AV_NOPTS_VALUE)
2406         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
2407     else
2408         opkt.pts = AV_NOPTS_VALUE;
2409
2410     if (pkt->dts == AV_NOPTS_VALUE)
2411         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
2412     else
2413         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
2414     opkt.dts -= ost_tb_start_time;
2415
2416     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
2417     opkt.flags    = pkt->flags;
2418
2419     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
2420     if (  ost->st->codec->codec_id != CODEC_ID_H264
2421        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
2422        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
2423        && ost->st->codec->codec_id != CODEC_ID_VC1
2424        ) {
2425         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
2426             opkt.destruct = av_destruct_packet;
2427     } else {
2428         opkt.data = pkt->data;
2429         opkt.size = pkt->size;
2430     }
2431     if (of->ctx->oformat->flags & AVFMT_RAWPICTURE) {
2432         /* store AVPicture in AVPacket, as expected by the output format */
2433         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
2434         opkt.data = (uint8_t *)&pict;
2435         opkt.size = sizeof(AVPicture);
2436         opkt.flags |= AV_PKT_FLAG_KEY;
2437     }
2438
2439     write_frame(of->ctx, &opkt, ost);
2440     ost->st->codec->frame_number++;
2441     av_free_packet(&opkt);
2442 }
2443
2444 static void rate_emu_sleep(InputStream *ist)
2445 {
2446     if (input_files[ist->file_index]->rate_emu) {
2447         int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
2448         int64_t now = av_gettime() - ist->start;
2449         if (pts > now)
2450             usleep(pts - now);
2451     }
2452 }
2453
2454 static int transcode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
2455 {
2456     AVFrame *decoded_frame;
2457     AVCodecContext *avctx = ist->st->codec;
2458     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
2459     int i, ret;
2460
2461     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2462         return AVERROR(ENOMEM);
2463     else
2464         avcodec_get_frame_defaults(ist->decoded_frame);
2465     decoded_frame = ist->decoded_frame;
2466
2467     update_benchmark(NULL);
2468     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
2469     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
2470     if (ret < 0) {
2471         return ret;
2472     }
2473     if (avctx->sample_rate <= 0) {
2474         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
2475         return AVERROR_INVALIDDATA;
2476     }
2477
2478     if (!*got_output) {
2479         /* no audio frame */
2480         return ret;
2481     }
2482
2483     /* if the decoder provides a pts, use it instead of the last packet pts.
2484        the decoder could be delaying output by a packet or more. */
2485     if (decoded_frame->pts != AV_NOPTS_VALUE)
2486         ist->dts = ist->next_dts = ist->pts = ist->next_pts = decoded_frame->pts;
2487
2488     /* increment next_dts to use for the case where the input stream does not
2489        have timestamps or there are multiple frames in the packet */
2490     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2491                      avctx->sample_rate;
2492     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
2493                      avctx->sample_rate;
2494
2495
2496     // preprocess audio (volume)
2497     if (audio_volume != 256) {
2498         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
2499         void *samples = decoded_frame->data[0];
2500         switch (avctx->sample_fmt) {
2501         case AV_SAMPLE_FMT_U8:
2502         {
2503             uint8_t *volp = samples;
2504             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2505                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
2506                 *volp++ = av_clip_uint8(v);
2507             }
2508             break;
2509         }
2510         case AV_SAMPLE_FMT_S16:
2511         {
2512             int16_t *volp = samples;
2513             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2514                 int v = ((*volp) * audio_volume + 128) >> 8;
2515                 *volp++ = av_clip_int16(v);
2516             }
2517             break;
2518         }
2519         case AV_SAMPLE_FMT_S32:
2520         {
2521             int32_t *volp = samples;
2522             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2523                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
2524                 *volp++ = av_clipl_int32(v);
2525             }
2526             break;
2527         }
2528         case AV_SAMPLE_FMT_FLT:
2529         {
2530             float *volp = samples;
2531             float scale = audio_volume / 256.f;
2532             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2533                 *volp++ *= scale;
2534             }
2535             break;
2536         }
2537         case AV_SAMPLE_FMT_DBL:
2538         {
2539             double *volp = samples;
2540             double scale = audio_volume / 256.;
2541             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2542                 *volp++ *= scale;
2543             }
2544             break;
2545         }
2546         default:
2547             av_log(NULL, AV_LOG_FATAL,
2548                    "Audio volume adjustment on sample format %s is not supported.\n",
2549                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
2550             exit_program(1);
2551         }
2552     }
2553
2554     rate_emu_sleep(ist);
2555
2556     for (i = 0; i < nb_output_streams; i++) {
2557         OutputStream *ost = output_streams[i];
2558
2559         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2560             continue;
2561         do_audio_out(output_files[ost->file_index]->ctx, ost, ist, decoded_frame);
2562     }
2563
2564     return ret;
2565 }
2566
2567 static int transcode_video(InputStream *ist, AVPacket *pkt, int *got_output, int64_t *pkt_pts)
2568 {
2569     AVFrame *decoded_frame;
2570     void *buffer_to_free = NULL;
2571     int i, ret = 0, resample_changed;
2572     int64_t best_effort_timestamp;
2573     AVRational *frame_sample_aspect;
2574     float quality;
2575
2576     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2577         return AVERROR(ENOMEM);
2578     else
2579         avcodec_get_frame_defaults(ist->decoded_frame);
2580     decoded_frame = ist->decoded_frame;
2581     pkt->pts  = *pkt_pts;
2582     pkt->dts  = ist->dts;
2583     *pkt_pts  = AV_NOPTS_VALUE;
2584
2585     update_benchmark(NULL);
2586     ret = avcodec_decode_video2(ist->st->codec,
2587                                 decoded_frame, got_output, pkt);
2588     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
2589     if (ret < 0)
2590         return ret;
2591
2592     quality = same_quant ? decoded_frame->quality : 0;
2593     if (!*got_output) {
2594         /* no picture yet */
2595         if (!pkt->size)
2596             for (i = 0; i < ist->nb_filters; i++)
2597                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
2598         return ret;
2599     }
2600
2601     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
2602     if(best_effort_timestamp != AV_NOPTS_VALUE)
2603         ist->next_pts = ist->pts = decoded_frame->pts = best_effort_timestamp;
2604
2605     pkt->size = 0;
2606
2607     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2608
2609     rate_emu_sleep(ist);
2610
2611     if (ist->st->sample_aspect_ratio.num)
2612         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2613
2614     resample_changed = ist->resample_width   != decoded_frame->width  ||
2615                        ist->resample_height  != decoded_frame->height ||
2616                        ist->resample_pix_fmt != decoded_frame->format;
2617     if (resample_changed) {
2618         av_log(NULL, AV_LOG_INFO,
2619                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2620                ist->file_index, ist->st->index,
2621                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2622                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2623
2624         ist->resample_width   = decoded_frame->width;
2625         ist->resample_height  = decoded_frame->height;
2626         ist->resample_pix_fmt = decoded_frame->format;
2627
2628         for (i = 0; i < nb_filtergraphs; i++)
2629             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2630                 configure_filtergraph(filtergraphs[i]) < 0) {
2631                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2632                 exit_program(1);
2633             }
2634     }
2635
2636     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2637     for (i = 0; i < ist->nb_filters; i++) {
2638         int changed =      ist->st->codec->width   != ist->filters[i]->filter->outputs[0]->w
2639                         || ist->st->codec->height  != ist->filters[i]->filter->outputs[0]->h
2640                         || ist->st->codec->pix_fmt != ist->filters[i]->filter->outputs[0]->format;
2641         // XXX what an ugly hack
2642         if (ist->filters[i]->graph->nb_outputs == 1)
2643             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2644
2645         if (!frame_sample_aspect->num)
2646             *frame_sample_aspect = ist->st->sample_aspect_ratio;
2647         if (ist->dr1 && decoded_frame->type==FF_BUFFER_TYPE_USER && !changed) {
2648             FrameBuffer      *buf = decoded_frame->opaque;
2649             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2650                                         decoded_frame->data, decoded_frame->linesize,
2651                                         AV_PERM_READ | AV_PERM_PRESERVE,
2652                                         ist->st->codec->width, ist->st->codec->height,
2653                                         ist->st->codec->pix_fmt);
2654
2655             avfilter_copy_frame_props(fb, decoded_frame);
2656             fb->buf->priv           = buf;
2657             fb->buf->free           = filter_release_buffer;
2658
2659             av_assert0(buf->refcount>0);
2660             buf->refcount++;
2661             av_buffersrc_buffer(ist->filters[i]->filter, fb);
2662         } else
2663         if(av_vsrc_buffer_add_frame(ist->filters[i]->filter, decoded_frame,AV_VSRC_BUF_FLAG_OVERWRITE)<0) {
2664             av_log(NULL, AV_LOG_FATAL, "Failed to inject frame into filter network\n");
2665             exit_program(1);
2666         }
2667
2668     }
2669
2670     av_free(buffer_to_free);
2671     return ret;
2672 }
2673
2674 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2675 {
2676     AVSubtitle subtitle;
2677     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2678                                           &subtitle, got_output, pkt);
2679     if (ret < 0)
2680         return ret;
2681     if (!*got_output)
2682         return ret;
2683
2684     rate_emu_sleep(ist);
2685
2686     for (i = 0; i < nb_output_streams; i++) {
2687         OutputStream *ost = output_streams[i];
2688
2689         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2690             continue;
2691
2692         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2693     }
2694
2695     avsubtitle_free(&subtitle);
2696     return ret;
2697 }
2698
2699 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2700 static int output_packet(InputStream *ist, const AVPacket *pkt)
2701 {
2702     int ret = 0, i;
2703     int got_output;
2704     int64_t pkt_pts = AV_NOPTS_VALUE;
2705
2706     AVPacket avpkt;
2707     if (!ist->saw_first_ts) {
2708         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;
2709         ist->pts = 0;
2710         if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
2711             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2712             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
2713         }
2714         ist->saw_first_ts = 1;
2715     }
2716
2717     if (ist->next_dts == AV_NOPTS_VALUE)
2718         ist->next_dts = ist->dts;
2719     if (ist->next_pts == AV_NOPTS_VALUE)
2720         ist->next_pts = ist->pts;
2721
2722     if (pkt == NULL) {
2723         /* EOF handling */
2724         av_init_packet(&avpkt);
2725         avpkt.data = NULL;
2726         avpkt.size = 0;
2727         goto handle_eof;
2728     } else {
2729         avpkt = *pkt;
2730     }
2731
2732     if (pkt->dts != AV_NOPTS_VALUE) {
2733         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2734         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2735             ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2736     }
2737     if(pkt->pts != AV_NOPTS_VALUE)
2738         pkt_pts = av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2739
2740     // while we have more to decode or while the decoder did output something on EOF
2741     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2742         int duration;
2743     handle_eof:
2744
2745         ist->pts = ist->next_pts;
2746         ist->dts = ist->next_dts;
2747
2748         if (avpkt.size && avpkt.size != pkt->size) {
2749             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2750                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2751             ist->showed_multi_packet_warning = 1;
2752         }
2753
2754         switch (ist->st->codec->codec_type) {
2755         case AVMEDIA_TYPE_AUDIO:
2756             ret = transcode_audio    (ist, &avpkt, &got_output);
2757             break;
2758         case AVMEDIA_TYPE_VIDEO:
2759             ret = transcode_video    (ist, &avpkt, &got_output, &pkt_pts);
2760             if (avpkt.duration) {
2761                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2762             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
2763                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
2764                 duration = ((int64_t)AV_TIME_BASE *
2765                                 ist->st->codec->time_base.num * ticks) /
2766                                 ist->st->codec->time_base.den;
2767             } else
2768                 duration = 0;
2769
2770             if(ist->dts != AV_NOPTS_VALUE && duration) {
2771                 ist->next_dts += duration;
2772             }else
2773                 ist->next_dts = AV_NOPTS_VALUE;
2774
2775             if (got_output)
2776                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
2777             break;
2778         case AVMEDIA_TYPE_SUBTITLE:
2779             ret = transcode_subtitles(ist, &avpkt, &got_output);
2780             break;
2781         default:
2782             return -1;
2783         }
2784
2785         if (ret < 0)
2786             return ret;
2787
2788         avpkt.dts=
2789         avpkt.pts= AV_NOPTS_VALUE;
2790
2791         // touch data and size only if not EOF
2792         if (pkt) {
2793             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
2794                 ret = avpkt.size;
2795             avpkt.data += ret;
2796             avpkt.size -= ret;
2797         }
2798         if (!got_output) {
2799             continue;
2800         }
2801     }
2802
2803     /* handle stream copy */
2804     if (!ist->decoding_needed) {
2805         rate_emu_sleep(ist);
2806         ist->dts = ist->next_dts;
2807         switch (ist->st->codec->codec_type) {
2808         case AVMEDIA_TYPE_AUDIO:
2809             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2810                              ist->st->codec->sample_rate;
2811             break;
2812         case AVMEDIA_TYPE_VIDEO:
2813             if (pkt->duration) {
2814                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2815             } else if(ist->st->codec->time_base.num != 0) {
2816                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2817                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2818                                   ist->st->codec->time_base.num * ticks) /
2819                                   ist->st->codec->time_base.den;
2820             }
2821             break;
2822         }
2823         ist->pts = ist->dts;
2824         ist->next_pts = ist->next_dts;
2825     }
2826     for (i = 0; pkt && i < nb_output_streams; i++) {
2827         OutputStream *ost = output_streams[i];
2828
2829         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2830             continue;
2831
2832         do_streamcopy(ist, ost, pkt);
2833     }
2834
2835     return 0;
2836 }
2837
2838 static void print_sdp(void)
2839 {
2840     char sdp[2048];
2841     int i;
2842     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2843
2844     if (!avc)
2845         exit_program(1);
2846     for (i = 0; i < nb_output_files; i++)
2847         avc[i] = output_files[i]->ctx;
2848
2849     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2850     printf("SDP:\n%s\n", sdp);
2851     fflush(stdout);
2852     av_freep(&avc);
2853 }
2854
2855 static int init_input_stream(int ist_index, char *error, int error_len)
2856 {
2857     int i;
2858     InputStream *ist = input_streams[ist_index];
2859
2860     if (ist->decoding_needed) {
2861         AVCodec *codec = ist->dec;
2862         if (!codec) {
2863             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2864                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
2865             return AVERROR(EINVAL);
2866         }
2867
2868         ist->dr1 = codec->capabilities & CODEC_CAP_DR1;
2869         if (codec->type == AVMEDIA_TYPE_VIDEO && ist->dr1) {
2870             ist->st->codec->get_buffer     = codec_get_buffer;
2871             ist->st->codec->release_buffer = codec_release_buffer;
2872             ist->st->codec->opaque         = ist;
2873         }
2874
2875         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2876             av_dict_set(&ist->opts, "threads", "auto", 0);
2877         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2878             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2879                     ist->file_index, ist->st->index);
2880             return AVERROR(EINVAL);
2881         }
2882         assert_codec_experimental(ist->st->codec, 0);
2883         assert_avoptions(ist->opts);
2884
2885         if (ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2886             for (i = 0; i < nb_output_streams; i++) {
2887                 OutputStream *ost = output_streams[i];
2888                 if (ost->source_index == ist_index) {
2889                     if (!ist->st->codec->channel_layout || !ost->st->codec->channel_layout)
2890                         get_default_channel_layouts(ost, ist);
2891                     break;
2892                 }
2893             }
2894         }
2895     }
2896
2897     ist->next_pts = AV_NOPTS_VALUE;
2898     ist->next_dts = AV_NOPTS_VALUE;
2899     ist->is_start = 1;
2900
2901     return 0;
2902 }
2903
2904 static InputStream *get_input_stream(OutputStream *ost)
2905 {
2906     if (ost->source_index >= 0)
2907         return input_streams[ost->source_index];
2908
2909     if (ost->filter) {
2910         FilterGraph *fg = ost->filter->graph;
2911         int i;
2912
2913         for (i = 0; i < fg->nb_inputs; i++)
2914             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
2915                 return fg->inputs[i]->ist;
2916     }
2917
2918     return NULL;
2919 }
2920
2921 static int transcode_init(void)
2922 {
2923     int ret = 0, i, j, k;
2924     AVFormatContext *oc;
2925     AVCodecContext *codec, *icodec;
2926     OutputStream *ost;
2927     InputStream *ist;
2928     char error[1024];
2929     int want_sdp = 1;
2930
2931     /* init framerate emulation */
2932     for (i = 0; i < nb_input_files; i++) {
2933         InputFile *ifile = input_files[i];
2934         if (ifile->rate_emu)
2935             for (j = 0; j < ifile->nb_streams; j++)
2936                 input_streams[j + ifile->ist_index]->start = av_gettime();
2937     }
2938
2939     /* output stream init */
2940     for (i = 0; i < nb_output_files; i++) {
2941         oc = output_files[i]->ctx;
2942         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2943             av_dump_format(oc, i, oc->filename, 1);
2944             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2945             return AVERROR(EINVAL);
2946         }
2947     }
2948
2949     /* init complex filtergraphs */
2950     for (i = 0; i < nb_filtergraphs; i++)
2951         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2952             return ret;
2953
2954     /* for each output stream, we compute the right encoding parameters */
2955     for (i = 0; i < nb_output_streams; i++) {
2956         ost = output_streams[i];
2957         oc  = output_files[ost->file_index]->ctx;
2958         ist = get_input_stream(ost);
2959
2960         if (ost->attachment_filename)
2961             continue;
2962
2963         codec  = ost->st->codec;
2964
2965         if (ist) {
2966             icodec = ist->st->codec;
2967
2968             ost->st->disposition          = ist->st->disposition;
2969             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2970             codec->chroma_sample_location = icodec->chroma_sample_location;
2971         }
2972
2973         if (ost->stream_copy) {
2974             uint64_t extra_size;
2975
2976             av_assert0(ist && !ost->filter);
2977
2978             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2979
2980             if (extra_size > INT_MAX) {
2981                 return AVERROR(EINVAL);
2982             }
2983
2984             /* if stream_copy is selected, no need to decode or encode */
2985             codec->codec_id   = icodec->codec_id;
2986             codec->codec_type = icodec->codec_type;
2987
2988             if (!codec->codec_tag) {
2989                 if (!oc->oformat->codec_tag ||
2990                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2991                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2992                     codec->codec_tag = icodec->codec_tag;
2993             }
2994
2995             codec->bit_rate       = icodec->bit_rate;
2996             codec->rc_max_rate    = icodec->rc_max_rate;
2997             codec->rc_buffer_size = icodec->rc_buffer_size;
2998             codec->field_order    = icodec->field_order;
2999             codec->extradata      = av_mallocz(extra_size);
3000             if (!codec->extradata) {
3001                 return AVERROR(ENOMEM);
3002             }
3003             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
3004             codec->extradata_size= icodec->extradata_size;
3005
3006             codec->time_base = ist->st->time_base;
3007             /*
3008              * Avi is a special case here because it supports variable fps but
3009              * having the fps and timebase differe significantly adds quite some
3010              * overhead
3011              */
3012             if(!strcmp(oc->oformat->name, "avi")) {
3013                 if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
3014                                  && av_q2d(ist->st->time_base) < 1.0/500
3015                     || copy_tb==0){
3016                     codec->time_base = icodec->time_base;
3017                     codec->time_base.num *= icodec->ticks_per_frame;
3018                     codec->time_base.den *= 2;
3019                     codec->ticks_per_frame = 2;
3020                 }
3021             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
3022                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
3023                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
3024             ) {
3025                 if(   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
3026                                 && av_q2d(ist->st->time_base) < 1.0/500
3027                    || copy_tb==0){
3028                     codec->time_base = icodec->time_base;
3029                     codec->time_base.num *= icodec->ticks_per_frame;
3030                 }
3031             }
3032             av_reduce(&codec->time_base.num, &codec->time_base.den,
3033                         codec->time_base.num, codec->time_base.den, INT_MAX);
3034
3035             switch (codec->codec_type) {
3036             case AVMEDIA_TYPE_AUDIO:
3037                 if (audio_volume != 256) {
3038                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
3039                     exit_program(1);
3040                 }
3041                 codec->channel_layout     = icodec->channel_layout;
3042                 codec->sample_rate        = icodec->sample_rate;
3043                 codec->channels           = icodec->channels;
3044                 codec->frame_size         = icodec->frame_size;
3045                 codec->audio_service_type = icodec->audio_service_type;
3046                 codec->block_align        = icodec->block_align;
3047                 break;
3048             case AVMEDIA_TYPE_VIDEO:
3049                 codec->pix_fmt            = icodec->pix_fmt;
3050                 codec->width              = icodec->width;
3051                 codec->height             = icodec->height;
3052                 codec->has_b_frames       = icodec->has_b_frames;
3053                 if (!codec->sample_aspect_ratio.num) {
3054                     codec->sample_aspect_ratio   =
3055                     ost->st->sample_aspect_ratio =
3056                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
3057                         ist->st->codec->sample_aspect_ratio.num ?
3058                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
3059                 }
3060                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
3061                 break;
3062             case AVMEDIA_TYPE_SUBTITLE:
3063                 codec->width  = icodec->width;
3064                 codec->height = icodec->height;
3065                 break;
3066             case AVMEDIA_TYPE_DATA:
3067             case AVMEDIA_TYPE_ATTACHMENT:
3068                 break;
3069             default:
3070                 abort();
3071             }
3072         } else {
3073             if (!ost->enc)
3074                 ost->enc = avcodec_find_encoder(codec->codec_id);
3075             if (!ost->enc) {
3076                 /* should only happen when a default codec is not present. */
3077                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
3078                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
3079                 ret = AVERROR(EINVAL);
3080                 goto dump_format;
3081             }
3082
3083             if (ist)
3084                 ist->decoding_needed = 1;
3085             ost->encoding_needed = 1;
3086
3087             switch (codec->codec_type) {
3088             case AVMEDIA_TYPE_AUDIO:
3089                 ost->fifo = av_fifo_alloc(1024);
3090                 if (!ost->fifo) {
3091                     return AVERROR(ENOMEM);
3092                 }
3093
3094                 if (!codec->sample_rate)
3095                     codec->sample_rate = icodec->sample_rate;
3096                 choose_sample_rate(ost->st, ost->enc);
3097                 codec->time_base = (AVRational){ 1, codec->sample_rate };
3098
3099                 if (codec->sample_fmt == AV_SAMPLE_FMT_NONE)
3100                     codec->sample_fmt = icodec->sample_fmt;
3101                 choose_sample_fmt(ost->st, ost->enc);
3102
3103                 if (ost->audio_channels_mapped) {
3104                     /* the requested output channel is set to the number of
3105                      * -map_channel only if no -ac are specified */
3106                     if (!codec->channels) {
3107                         codec->channels       = ost->audio_channels_mapped;
3108                         codec->channel_layout = av_get_default_channel_layout(codec->channels);
3109                         if (!codec->channel_layout) {
3110                             av_log(NULL, AV_LOG_FATAL, "Unable to find an appropriate channel layout for requested number of channel\n");
3111                             exit_program(1);
3112                         }
3113                     }
3114                     /* fill unused channel mapping with -1 (which means a muted
3115                      * channel in case the number of output channels is bigger
3116                      * than the number of mapped channel) */
3117                     for (j = ost->audio_channels_mapped; j < FF_ARRAY_ELEMS(ost->audio_channels_map); j++)
3118                         ost->audio_channels_map[j] = -1;
3119                 } else if (!codec->channels) {
3120                     codec->channels = icodec->channels;
3121                     codec->channel_layout = icodec->channel_layout;
3122                 }
3123                 if (av_get_channel_layout_nb_channels(codec->channel_layout) != codec->channels)
3124                     codec->channel_layout = 0;
3125
3126
3127 //                 ost->audio_resample       = codec->sample_rate != icodec->sample_rate || audio_sync_method > 1;
3128 //                 ost->audio_resample      |=    codec->sample_fmt     != icodec->sample_fmt
3129 //                                             || codec->channel_layout != icodec->channel_layout;
3130                 icodec->request_channels  = codec-> channels;
3131                 ost->resample_sample_fmt  = icodec->sample_fmt;
3132                 ost->resample_sample_rate = icodec->sample_rate;
3133                 ost->resample_channels    = icodec->channels;
3134                 ost->resample_channel_layout = icodec->channel_layout;
3135                 break;
3136             case AVMEDIA_TYPE_VIDEO:
3137                 if (!ost->filter) {
3138                     FilterGraph *fg;
3139                     fg = init_simple_filtergraph(ist, ost);
3140                     if (configure_video_filters(fg)) {
3141                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
3142                         exit(1);
3143                     }
3144                 }
3145
3146                 if (ist && !ost->frame_rate.num)
3147                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational) { 25, 1 };
3148                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
3149                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
3150                     ost->frame_rate = ost->enc->supported_framerates[idx];
3151                 }
3152                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
3153                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
3154                    && (video_sync_method == VSYNC_CFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
3155                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
3156                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
3157                 }
3158                 for (j = 0; j < ost->forced_kf_count; j++)
3159                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
3160                                                          AV_TIME_BASE_Q,
3161                                                          codec->time_base);
3162
3163                 codec->width  = ost->filter->filter->inputs[0]->w;
3164                 codec->height = ost->filter->filter->inputs[0]->h;
3165                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
3166                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
3167                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
3168                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
3169                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
3170
3171                 if (codec->width   != icodec->width  ||
3172                     codec->height  != icodec->height ||
3173                     codec->pix_fmt != icodec->pix_fmt) {
3174                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
3175                 }
3176
3177                 break;
3178             case AVMEDIA_TYPE_SUBTITLE:
3179                 codec->time_base = (AVRational){1, 1000};
3180                 break;
3181             default:
3182                 abort();
3183                 break;
3184             }
3185             /* two pass mode */
3186             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
3187                 char logfilename[1024];
3188                 FILE *f;
3189
3190                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
3191                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
3192                          i);
3193                 if (!strcmp(ost->enc->name, "libx264")) {
3194                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
3195                 } else {
3196                     if (codec->flags & CODEC_FLAG_PASS2) {
3197                         char  *logbuffer;
3198                         size_t logbuffer_size;
3199                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
3200                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
3201                                 logfilename);
3202                             exit_program(1);
3203                         }
3204                         codec->stats_in = logbuffer;
3205                     }
3206                     if (codec->flags & CODEC_FLAG_PASS1) {
3207                         f = fopen(logfilename, "wb");
3208                         if (!f) {
3209                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
3210                                 logfilename, strerror(errno));
3211                             exit_program(1);
3212                         }
3213                         ost->logfile = f;
3214                     }
3215                 }
3216             }
3217         }
3218     }
3219
3220     /* open each encoder */
3221     for (i = 0; i < nb_output_streams; i++) {
3222         ost = output_streams[i];
3223         if (ost->encoding_needed) {
3224             AVCodec      *codec = ost->enc;
3225             AVCodecContext *dec = NULL;
3226
3227             if ((ist = get_input_stream(ost)))
3228                 dec = ist->st->codec;
3229             if (dec && dec->subtitle_header) {
3230                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
3231                 if (!ost->st->codec->subtitle_header) {
3232                     ret = AVERROR(ENOMEM);
3233                     goto dump_format;
3234                 }
3235                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
3236                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
3237             }
3238             if (!av_dict_get(ost->opts, "threads", NULL, 0))
3239                 av_dict_set(&ost->opts, "threads", "auto", 0);
3240             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
3241                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
3242                         ost->file_index, ost->index);
3243                 ret = AVERROR(EINVAL);
3244                 goto dump_format;
3245             }
3246             assert_codec_experimental(ost->st->codec, 1);
3247             assert_avoptions(ost->opts);
3248             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
3249                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
3250                                              " It takes bits/s as argument, not kbits/s\n");
3251             extra_size += ost->st->codec->extradata_size;
3252
3253             if (ost->st->codec->me_threshold)
3254                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
3255         }
3256     }
3257
3258     /* init input streams */
3259     for (i = 0; i < nb_input_streams; i++)
3260         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
3261             goto dump_format;
3262
3263     /* discard unused programs */
3264     for (i = 0; i < nb_input_files; i++) {
3265         InputFile *ifile = input_files[i];
3266         for (j = 0; j < ifile->ctx->nb_programs; j++) {
3267             AVProgram *p = ifile->ctx->programs[j];
3268             int discard  = AVDISCARD_ALL;
3269
3270             for (k = 0; k < p->nb_stream_indexes; k++)
3271                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
3272                     discard = AVDISCARD_DEFAULT;
3273                     break;
3274                 }
3275             p->discard = discard;
3276         }
3277     }
3278
3279     /* open files and write file headers */
3280     for (i = 0; i < nb_output_files; i++) {
3281         oc = output_files[i]->ctx;
3282         oc->interrupt_callback = int_cb;
3283         if (avformat_write_header(oc, &output_files[i]->opts) < 0) {
3284             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?)", i);
3285             ret = AVERROR(EINVAL);
3286             goto dump_format;
3287         }
3288 //         assert_avoptions(output_files[i]->opts);
3289         if (strcmp(oc->oformat->name, "rtp")) {
3290             want_sdp = 0;
3291         }
3292     }
3293
3294  dump_format:
3295     /* dump the file output parameters - cannot be done before in case
3296        of stream copy */
3297     for (i = 0; i < nb_output_files; i++) {
3298         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
3299     }
3300
3301     /* dump the stream mapping */
3302     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
3303     for (i = 0; i < nb_input_streams; i++) {
3304         ist = input_streams[i];
3305
3306         for (j = 0; j < ist->nb_filters; j++) {
3307             AVFilterLink *link = ist->filters[j]->filter->outputs[0];
3308             if (ist->filters[j]->graph->graph_desc) {
3309                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
3310                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
3311                        link->dst->filter->name);
3312                 if (link->dst->input_count > 1)
3313                     av_log(NULL, AV_LOG_INFO, ":%s", link->dstpad->name);
3314                 if (nb_filtergraphs > 1)
3315                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
3316                 av_log(NULL, AV_LOG_INFO, "\n");
3317             }
3318         }
3319     }
3320
3321     for (i = 0; i < nb_output_streams; i++) {
3322         ost = output_streams[i];
3323
3324         if (ost->attachment_filename) {
3325             /* an attached file */
3326             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
3327                    ost->attachment_filename, ost->file_index, ost->index);
3328             continue;
3329         }
3330
3331         if (ost->filter && ost->filter->graph->graph_desc) {
3332             /* output from a complex graph */
3333             AVFilterLink *link = ost->filter->filter->inputs[0];
3334             av_log(NULL, AV_LOG_INFO, "  %s", link->src->filter->name);
3335             if (link->src->output_count > 1)
3336                 av_log(NULL, AV_LOG_INFO, ":%s", link->srcpad->name);
3337             if (nb_filtergraphs > 1)
3338                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
3339
3340             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
3341                    ost->index, ost->enc ? ost->enc->name : "?");
3342             continue;
3343         }
3344
3345         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
3346                input_streams[ost->source_index]->file_index,
3347                input_streams[ost->source_index]->st->index,
3348                ost->file_index,
3349                ost->index);
3350         if (ost->audio_channels_mapped) {
3351             av_log(NULL, AV_LOG_INFO, " [ch:");
3352             for (j = 0; j < ost->audio_channels_mapped; j++)
3353                 if (ost->audio_channels_map[j] == -1)
3354                     av_log(NULL, AV_LOG_INFO, " M");
3355                 else
3356                     av_log(NULL, AV_LOG_INFO, " %d", ost->audio_channels_map[j]);
3357             av_log(NULL, AV_LOG_INFO, "]");
3358         }
3359         if (ost->sync_ist != input_streams[ost->source_index])
3360             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
3361                    ost->sync_ist->file_index,
3362                    ost->sync_ist->st->index);
3363         if (ost->stream_copy)
3364             av_log(NULL, AV_LOG_INFO, " (copy)");
3365         else
3366             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
3367                    input_streams[ost->source_index]->dec->name : "?",
3368                    ost->enc ? ost->enc->name : "?");
3369         av_log(NULL, AV_LOG_INFO, "\n");
3370     }
3371
3372     if (ret) {
3373         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
3374         return ret;
3375     }
3376
3377     if (want_sdp) {
3378         print_sdp();
3379     }
3380
3381     return 0;
3382 }
3383
3384 /*
3385  * The following code is the main loop of the file converter
3386  */
3387 static int transcode(void)
3388 {
3389     int ret, i;
3390     AVFormatContext *is, *os;
3391     OutputStream *ost;
3392     InputStream *ist;
3393     uint8_t *no_packet;
3394     int no_packet_count = 0;
3395     int64_t timer_start;
3396     int key;
3397
3398     if (!(no_packet = av_mallocz(nb_input_files)))
3399         exit_program(1);
3400
3401     ret = transcode_init();
3402     if (ret < 0)
3403         goto fail;
3404
3405     if (!using_stdin) {
3406         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
3407     }
3408
3409     timer_start = av_gettime();
3410
3411     for (; received_sigterm == 0;) {
3412         int file_index, ist_index, past_recording_time = 1;
3413         AVPacket pkt;
3414         int64_t ipts_min;
3415         int64_t cur_time= av_gettime();
3416
3417         ipts_min = INT64_MAX;
3418         /* if 'q' pressed, exits */
3419         if (!using_stdin) {
3420             static int64_t last_time;
3421             if (received_nb_signals)
3422                 break;
3423             /* read_key() returns 0 on EOF */
3424             if(cur_time - last_time >= 100000 && !run_as_daemon){
3425                 key =  read_key();
3426                 last_time = cur_time;
3427             }else
3428                 key = -1;
3429             if (key == 'q')
3430                 break;
3431             if (key == '+') av_log_set_level(av_log_get_level()+10);
3432             if (key == '-') av_log_set_level(av_log_get_level()-10);
3433             if (key == 's') qp_hist     ^= 1;
3434             if (key == 'h'){
3435                 if (do_hex_dump){
3436                     do_hex_dump = do_pkt_dump = 0;
3437                 } else if(do_pkt_dump){
3438                     do_hex_dump = 1;
3439                 } else
3440                     do_pkt_dump = 1;
3441                 av_log_set_level(AV_LOG_DEBUG);
3442             }
3443             if (key == 'c' || key == 'C'){
3444                 char buf[4096], target[64], command[256], arg[256] = {0};
3445                 double time;
3446                 int k, n = 0;
3447                 fprintf(stderr, "\nEnter command: <target> <time> <command>[ <argument>]\n");
3448                 i = 0;
3449                 while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3450                     if (k > 0)
3451                         buf[i++] = k;
3452                 buf[i] = 0;
3453                 if (k > 0 &&
3454                     (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
3455                     av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
3456                            target, time, command, arg);
3457                     for (i = 0; i < nb_filtergraphs; i++) {
3458                         FilterGraph *fg = filtergraphs[i];
3459                         if (fg->graph) {
3460                             if (time < 0) {
3461                                 ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
3462                                                                   key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
3463                                 fprintf(stderr, "Command reply for stream %d: ret:%d res:%s\n", i, ret, buf);
3464                             } else {
3465                                 ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
3466                             }
3467                         }
3468                     }
3469                 } else {
3470                     av_log(NULL, AV_LOG_ERROR,
3471                            "Parse error, at least 3 arguments were expected, "
3472                            "only %d given in string '%s'\n", n, buf);
3473                 }
3474             }
3475             if (key == 'd' || key == 'D'){
3476                 int debug=0;
3477                 if(key == 'D') {
3478                     debug = input_streams[0]->st->codec->debug<<1;
3479                     if(!debug) debug = 1;
3480                     while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
3481                         debug += debug;
3482                 }else
3483                     if(scanf("%d", &debug)!=1)
3484                         fprintf(stderr,"error parsing debug value\n");
3485                 for(i=0;i<nb_input_streams;i++) {
3486                     input_streams[i]->st->codec->debug = debug;
3487                 }
3488                 for(i=0;i<nb_output_streams;i++) {
3489                     ost = output_streams[i];
3490                     ost->st->codec->debug = debug;
3491                 }
3492                 if(debug) av_log_set_level(AV_LOG_DEBUG);
3493                 fprintf(stderr,"debug=%d\n", debug);
3494             }
3495             if (key == '?'){
3496                 fprintf(stderr, "key    function\n"
3497                                 "?      show this help\n"
3498                                 "+      increase verbosity\n"
3499                                 "-      decrease verbosity\n"
3500                                 "c      Send command to filtergraph\n"
3501                                 "D      cycle through available debug modes\n"
3502                                 "h      dump packets/hex press to cycle through the 3 states\n"
3503                                 "q      quit\n"
3504                                 "s      Show QP histogram\n"
3505                 );
3506             }
3507         }
3508
3509         /* check if there's any stream where output is still needed */
3510         for (i = 0; i < nb_output_streams; i++) {
3511             OutputFile *of;
3512             ost = output_streams[i];
3513             of  = output_files[ost->file_index];
3514             os  = output_files[ost->file_index]->ctx;
3515             if (ost->is_past_recording_time ||
3516                 (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3517                 continue;
3518             if (ost->frame_number >= ost->max_frames) {
3519                 int j;
3520                 for (j = 0; j < of->ctx->nb_streams; j++)
3521                     output_streams[of->ost_index + j]->is_past_recording_time = 1;
3522                 continue;
3523             }
3524             past_recording_time = 0;
3525         }
3526         if (past_recording_time)
3527             break;
3528
3529         /* select the stream that we must read now by looking at the
3530            smallest output pts */
3531         file_index = -1;
3532         for (i = 0; i < nb_input_streams; i++) {
3533             int64_t ipts;
3534             ist = input_streams[i];
3535             ipts = ist->pts;
3536             if (ist->discard || no_packet[ist->file_index])
3537                 continue;
3538             if (!input_files[ist->file_index]->eof_reached) {
3539                 if (ipts < ipts_min) {
3540                     ipts_min = ipts;
3541                     file_index = ist->file_index;
3542                 }
3543             }
3544         }
3545         /* if none, if is finished */
3546         if (file_index < 0) {
3547             if (no_packet_count) {
3548                 no_packet_count = 0;
3549                 memset(no_packet, 0, nb_input_files);
3550                 usleep(10000);
3551                 continue;
3552             }
3553             break;
3554         }
3555
3556         /* read a frame from it and output it in the fifo */
3557         is  = input_files[file_index]->ctx;
3558         ret = av_read_frame(is, &pkt);
3559         if (ret == AVERROR(EAGAIN)) {
3560             no_packet[file_index] = 1;
3561             no_packet_count++;
3562             continue;
3563         }
3564         if (ret < 0) {
3565             input_files[file_index]->eof_reached = 1;
3566
3567             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
3568                 ist = input_streams[input_files[file_index]->ist_index + i];
3569                 if (ist->decoding_needed)
3570                     output_packet(ist, NULL);
3571             }
3572
3573             if (opt_shortest)
3574                 break;
3575             else
3576                 continue;
3577         }
3578
3579         no_packet_count = 0;
3580         memset(no_packet, 0, nb_input_files);
3581
3582         if (do_pkt_dump) {
3583             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3584                              is->streams[pkt.stream_index]);
3585         }
3586         /* the following test is needed in case new streams appear
3587            dynamically in stream : we ignore them */
3588         if (pkt.stream_index >= input_files[file_index]->nb_streams)
3589             goto discard_packet;
3590         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
3591         ist = input_streams[ist_index];
3592         if (ist->discard)
3593             goto discard_packet;
3594
3595         if (pkt.dts != AV_NOPTS_VALUE)
3596             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3597         if (pkt.pts != AV_NOPTS_VALUE)
3598             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3599
3600         if (pkt.pts != AV_NOPTS_VALUE)
3601             pkt.pts *= ist->ts_scale;
3602         if (pkt.dts != AV_NOPTS_VALUE)
3603             pkt.dts *= ist->ts_scale;
3604
3605         if (debug_ts) {
3606             av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
3607                     "next_pts:%s next_pts_time:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%"PRId64"\n",
3608                     ist_index, av_get_media_type_string(ist->st->codec->codec_type),
3609                     av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &ist->st->time_base),
3610                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3611                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3612                     input_files[ist->file_index]->ts_offset);
3613         }
3614
3615         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE && !copy_ts) {
3616             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3617             int64_t delta   = pkt_dts - ist->next_dts;
3618             if (is->iformat->flags & AVFMT_TS_DISCONT) {
3619             if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3620                 (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3621                  ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3622                 pkt_dts+1<ist->pts){
3623                 input_files[ist->file_index]->ts_offset -= delta;
3624                 av_log(NULL, AV_LOG_DEBUG,
3625                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3626                        delta, input_files[ist->file_index]->ts_offset);
3627                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3628             &n