avcodec/j2kenc: Support writing JP2 encapsulation
[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 <limits.h>
33 #include <stdint.h>
34
35 #if HAVE_ISATTY
36 #if HAVE_IO_H
37 #include <io.h>
38 #endif
39 #if HAVE_UNISTD_H
40 #include <unistd.h>
41 #endif
42 #endif
43
44 #include "libavformat/avformat.h"
45 #include "libavdevice/avdevice.h"
46 #include "libswresample/swresample.h"
47 #include "libavutil/opt.h"
48 #include "libavutil/channel_layout.h"
49 #include "libavutil/parseutils.h"
50 #include "libavutil/samplefmt.h"
51 #include "libavutil/fifo.h"
52 #include "libavutil/intreadwrite.h"
53 #include "libavutil/dict.h"
54 #include "libavutil/mathematics.h"
55 #include "libavutil/pixdesc.h"
56 #include "libavutil/avstring.h"
57 #include "libavutil/libm.h"
58 #include "libavutil/imgutils.h"
59 #include "libavutil/timestamp.h"
60 #include "libavutil/bprint.h"
61 #include "libavutil/time.h"
62 #include "libavutil/threadmessage.h"
63 #include "libavcodec/mathops.h"
64 #include "libavformat/os_support.h"
65
66 # include "libavfilter/avcodec.h"
67 # include "libavfilter/avfilter.h"
68 # include "libavfilter/buffersrc.h"
69 # include "libavfilter/buffersink.h"
70
71 #if HAVE_SYS_RESOURCE_H
72 #include <sys/time.h>
73 #include <sys/types.h>
74 #include <sys/resource.h>
75 #elif HAVE_GETPROCESSTIMES
76 #include <windows.h>
77 #endif
78 #if HAVE_GETPROCESSMEMORYINFO
79 #include <windows.h>
80 #include <psapi.h>
81 #endif
82
83 #if HAVE_SYS_SELECT_H
84 #include <sys/select.h>
85 #endif
86
87 #if HAVE_TERMIOS_H
88 #include <fcntl.h>
89 #include <sys/ioctl.h>
90 #include <sys/time.h>
91 #include <termios.h>
92 #elif HAVE_KBHIT
93 #include <conio.h>
94 #endif
95
96 #if HAVE_PTHREADS
97 #include <pthread.h>
98 #endif
99
100 #include <time.h>
101
102 #include "ffmpeg.h"
103 #include "cmdutils.h"
104
105 #include "libavutil/avassert.h"
106
107 const char program_name[] = "ffmpeg";
108 const int program_birth_year = 2000;
109
110 static FILE *vstats_file;
111
112 const char *const forced_keyframes_const_names[] = {
113     "n",
114     "n_forced",
115     "prev_forced_n",
116     "prev_forced_t",
117     "t",
118     NULL
119 };
120
121 static void do_video_stats(OutputStream *ost, int frame_size);
122 static int64_t getutime(void);
123 static int64_t getmaxrss(void);
124
125 static int run_as_daemon  = 0;
126 static int nb_frames_dup = 0;
127 static int nb_frames_drop = 0;
128 static int64_t decode_error_stat[2];
129
130 static int current_time;
131 AVIOContext *progress_avio = NULL;
132
133 static uint8_t *subtitle_out;
134
135 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
136
137 InputStream **input_streams = NULL;
138 int        nb_input_streams = 0;
139 InputFile   **input_files   = NULL;
140 int        nb_input_files   = 0;
141
142 OutputStream **output_streams = NULL;
143 int         nb_output_streams = 0;
144 OutputFile   **output_files   = NULL;
145 int         nb_output_files   = 0;
146
147 FilterGraph **filtergraphs;
148 int        nb_filtergraphs;
149
150 #if HAVE_TERMIOS_H
151
152 /* init terminal so that we can grab keys */
153 static struct termios oldtty;
154 static int restore_tty;
155 #endif
156
157 #if HAVE_PTHREADS
158 static void free_input_threads(void);
159 #endif
160
161 /* sub2video hack:
162    Convert subtitles to video with alpha to insert them in filter graphs.
163    This is a temporary solution until libavfilter gets real subtitles support.
164  */
165
166 static int sub2video_get_blank_frame(InputStream *ist)
167 {
168     int ret;
169     AVFrame *frame = ist->sub2video.frame;
170
171     av_frame_unref(frame);
172     ist->sub2video.frame->width  = ist->sub2video.w;
173     ist->sub2video.frame->height = ist->sub2video.h;
174     ist->sub2video.frame->format = AV_PIX_FMT_RGB32;
175     if ((ret = av_frame_get_buffer(frame, 32)) < 0)
176         return ret;
177     memset(frame->data[0], 0, frame->height * frame->linesize[0]);
178     return 0;
179 }
180
181 static void sub2video_copy_rect(uint8_t *dst, int dst_linesize, int w, int h,
182                                 AVSubtitleRect *r)
183 {
184     uint32_t *pal, *dst2;
185     uint8_t *src, *src2;
186     int x, y;
187
188     if (r->type != SUBTITLE_BITMAP) {
189         av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n");
190         return;
191     }
192     if (r->x < 0 || r->x + r->w > w || r->y < 0 || r->y + r->h > h) {
193         av_log(NULL, AV_LOG_WARNING, "sub2video: rectangle overflowing\n");
194         return;
195     }
196
197     dst += r->y * dst_linesize + r->x * 4;
198     src = r->pict.data[0];
199     pal = (uint32_t *)r->pict.data[1];
200     for (y = 0; y < r->h; y++) {
201         dst2 = (uint32_t *)dst;
202         src2 = src;
203         for (x = 0; x < r->w; x++)
204             *(dst2++) = pal[*(src2++)];
205         dst += dst_linesize;
206         src += r->pict.linesize[0];
207     }
208 }
209
210 static void sub2video_push_ref(InputStream *ist, int64_t pts)
211 {
212     AVFrame *frame = ist->sub2video.frame;
213     int i;
214
215     av_assert1(frame->data[0]);
216     ist->sub2video.last_pts = frame->pts = pts;
217     for (i = 0; i < ist->nb_filters; i++)
218         av_buffersrc_add_frame_flags(ist->filters[i]->filter, frame,
219                                      AV_BUFFERSRC_FLAG_KEEP_REF |
220                                      AV_BUFFERSRC_FLAG_PUSH);
221 }
222
223 static void sub2video_update(InputStream *ist, AVSubtitle *sub)
224 {
225     int w = ist->sub2video.w, h = ist->sub2video.h;
226     AVFrame *frame = ist->sub2video.frame;
227     int8_t *dst;
228     int     dst_linesize;
229     int num_rects, i;
230     int64_t pts, end_pts;
231
232     if (!frame)
233         return;
234     if (sub) {
235         pts       = av_rescale_q(sub->pts + sub->start_display_time * 1000LL,
236                                  AV_TIME_BASE_Q, ist->st->time_base);
237         end_pts   = av_rescale_q(sub->pts + sub->end_display_time   * 1000LL,
238                                  AV_TIME_BASE_Q, ist->st->time_base);
239         num_rects = sub->num_rects;
240     } else {
241         pts       = ist->sub2video.end_pts;
242         end_pts   = INT64_MAX;
243         num_rects = 0;
244     }
245     if (sub2video_get_blank_frame(ist) < 0) {
246         av_log(ist->dec_ctx, AV_LOG_ERROR,
247                "Impossible to get a blank canvas.\n");
248         return;
249     }
250     dst          = frame->data    [0];
251     dst_linesize = frame->linesize[0];
252     for (i = 0; i < num_rects; i++)
253         sub2video_copy_rect(dst, dst_linesize, w, h, sub->rects[i]);
254     sub2video_push_ref(ist, pts);
255     ist->sub2video.end_pts = end_pts;
256 }
257
258 static void sub2video_heartbeat(InputStream *ist, int64_t pts)
259 {
260     InputFile *infile = input_files[ist->file_index];
261     int i, j, nb_reqs;
262     int64_t pts2;
263
264     /* When a frame is read from a file, examine all sub2video streams in
265        the same file and send the sub2video frame again. Otherwise, decoded
266        video frames could be accumulating in the filter graph while a filter
267        (possibly overlay) is desperately waiting for a subtitle frame. */
268     for (i = 0; i < infile->nb_streams; i++) {
269         InputStream *ist2 = input_streams[infile->ist_index + i];
270         if (!ist2->sub2video.frame)
271             continue;
272         /* subtitles seem to be usually muxed ahead of other streams;
273            if not, subtracting a larger time here is necessary */
274         pts2 = av_rescale_q(pts, ist->st->time_base, ist2->st->time_base) - 1;
275         /* do not send the heartbeat frame if the subtitle is already ahead */
276         if (pts2 <= ist2->sub2video.last_pts)
277             continue;
278         if (pts2 >= ist2->sub2video.end_pts || !ist2->sub2video.frame->data[0])
279             sub2video_update(ist2, NULL);
280         for (j = 0, nb_reqs = 0; j < ist2->nb_filters; j++)
281             nb_reqs += av_buffersrc_get_nb_failed_requests(ist2->filters[j]->filter);
282         if (nb_reqs)
283             sub2video_push_ref(ist2, pts2);
284     }
285 }
286
287 static void sub2video_flush(InputStream *ist)
288 {
289     int i;
290
291     if (ist->sub2video.end_pts < INT64_MAX)
292         sub2video_update(ist, NULL);
293     for (i = 0; i < ist->nb_filters; i++)
294         av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
295 }
296
297 /* end of sub2video hack */
298
299 static void term_exit_sigsafe(void)
300 {
301 #if HAVE_TERMIOS_H
302     if(restore_tty)
303         tcsetattr (0, TCSANOW, &oldtty);
304 #endif
305 }
306
307 void term_exit(void)
308 {
309     av_log(NULL, AV_LOG_QUIET, "%s", "");
310     term_exit_sigsafe();
311 }
312
313 static volatile int received_sigterm = 0;
314 static volatile int received_nb_signals = 0;
315 static volatile int transcode_init_done = 0;
316 static int main_return_code = 0;
317
318 static void
319 sigterm_handler(int sig)
320 {
321     received_sigterm = sig;
322     received_nb_signals++;
323     term_exit_sigsafe();
324     if(received_nb_signals > 3)
325         exit(123);
326 }
327
328 void term_init(void)
329 {
330 #if HAVE_TERMIOS_H
331     if(!run_as_daemon){
332         struct termios tty;
333         int istty = 1;
334 #if HAVE_ISATTY
335         istty = isatty(0) && isatty(2);
336 #endif
337         if (istty && tcgetattr (0, &tty) == 0) {
338             oldtty = tty;
339             restore_tty = 1;
340
341             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
342                              |INLCR|IGNCR|ICRNL|IXON);
343             tty.c_oflag |= OPOST;
344             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
345             tty.c_cflag &= ~(CSIZE|PARENB);
346             tty.c_cflag |= CS8;
347             tty.c_cc[VMIN] = 1;
348             tty.c_cc[VTIME] = 0;
349
350             tcsetattr (0, TCSANOW, &tty);
351         }
352         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
353     }
354 #endif
355
356     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
357     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
358 #ifdef SIGXCPU
359     signal(SIGXCPU, sigterm_handler);
360 #endif
361 }
362
363 /* read a key without blocking */
364 static int read_key(void)
365 {
366     unsigned char ch;
367 #if HAVE_TERMIOS_H
368     int n = 1;
369     struct timeval tv;
370     fd_set rfds;
371
372     FD_ZERO(&rfds);
373     FD_SET(0, &rfds);
374     tv.tv_sec = 0;
375     tv.tv_usec = 0;
376     n = select(1, &rfds, NULL, NULL, &tv);
377     if (n > 0) {
378         n = read(0, &ch, 1);
379         if (n == 1)
380             return ch;
381
382         return n;
383     }
384 #elif HAVE_KBHIT
385 #    if HAVE_PEEKNAMEDPIPE
386     static int is_pipe;
387     static HANDLE input_handle;
388     DWORD dw, nchars;
389     if(!input_handle){
390         input_handle = GetStdHandle(STD_INPUT_HANDLE);
391         is_pipe = !GetConsoleMode(input_handle, &dw);
392     }
393
394     if (stdin->_cnt > 0) {
395         read(0, &ch, 1);
396         return ch;
397     }
398     if (is_pipe) {
399         /* When running under a GUI, you will end here. */
400         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL)) {
401             // input pipe may have been closed by the program that ran ffmpeg
402             return -1;
403         }
404         //Read it
405         if(nchars != 0) {
406             read(0, &ch, 1);
407             return ch;
408         }else{
409             return -1;
410         }
411     }
412 #    endif
413     if(kbhit())
414         return(getch());
415 #endif
416     return -1;
417 }
418
419 static int decode_interrupt_cb(void *ctx)
420 {
421     return received_nb_signals > transcode_init_done;
422 }
423
424 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
425
426 static void ffmpeg_cleanup(int ret)
427 {
428     int i, j;
429
430     if (do_benchmark) {
431         int maxrss = getmaxrss() / 1024;
432         printf("bench: maxrss=%ikB\n", maxrss);
433     }
434
435     for (i = 0; i < nb_filtergraphs; i++) {
436         FilterGraph *fg = filtergraphs[i];
437         avfilter_graph_free(&fg->graph);
438         for (j = 0; j < fg->nb_inputs; j++) {
439             av_freep(&fg->inputs[j]->name);
440             av_freep(&fg->inputs[j]);
441         }
442         av_freep(&fg->inputs);
443         for (j = 0; j < fg->nb_outputs; j++) {
444             av_freep(&fg->outputs[j]->name);
445             av_freep(&fg->outputs[j]);
446         }
447         av_freep(&fg->outputs);
448         av_freep(&fg->graph_desc);
449
450         av_freep(&filtergraphs[i]);
451     }
452     av_freep(&filtergraphs);
453
454     av_freep(&subtitle_out);
455
456     /* close files */
457     for (i = 0; i < nb_output_files; i++) {
458         OutputFile *of = output_files[i];
459         AVFormatContext *s = of->ctx;
460         if (s && s->oformat && !(s->oformat->flags & AVFMT_NOFILE))
461             avio_closep(&s->pb);
462         avformat_free_context(s);
463         av_dict_free(&of->opts);
464
465         av_freep(&output_files[i]);
466     }
467     for (i = 0; i < nb_output_streams; i++) {
468         OutputStream *ost = output_streams[i];
469         AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
470         while (bsfc) {
471             AVBitStreamFilterContext *next = bsfc->next;
472             av_bitstream_filter_close(bsfc);
473             bsfc = next;
474         }
475         ost->bitstream_filters = NULL;
476         av_frame_free(&ost->filtered_frame);
477         av_frame_free(&ost->last_frame);
478
479         av_parser_close(ost->parser);
480
481         av_freep(&ost->forced_keyframes);
482         av_expr_free(ost->forced_keyframes_pexpr);
483         av_freep(&ost->avfilter);
484         av_freep(&ost->logfile_prefix);
485
486         av_freep(&ost->audio_channels_map);
487         ost->audio_channels_mapped = 0;
488
489         avcodec_free_context(&ost->enc_ctx);
490
491         av_freep(&output_streams[i]);
492     }
493 #if HAVE_PTHREADS
494     free_input_threads();
495 #endif
496     for (i = 0; i < nb_input_files; i++) {
497         avformat_close_input(&input_files[i]->ctx);
498         av_freep(&input_files[i]);
499     }
500     for (i = 0; i < nb_input_streams; i++) {
501         InputStream *ist = input_streams[i];
502
503         av_frame_free(&ist->decoded_frame);
504         av_frame_free(&ist->filter_frame);
505         av_dict_free(&ist->decoder_opts);
506         avsubtitle_free(&ist->prev_sub.subtitle);
507         av_frame_free(&ist->sub2video.frame);
508         av_freep(&ist->filters);
509         av_freep(&ist->hwaccel_device);
510
511         avcodec_free_context(&ist->dec_ctx);
512
513         av_freep(&input_streams[i]);
514     }
515
516     if (vstats_file)
517         fclose(vstats_file);
518     av_freep(&vstats_filename);
519
520     av_freep(&input_streams);
521     av_freep(&input_files);
522     av_freep(&output_streams);
523     av_freep(&output_files);
524
525     uninit_opts();
526
527     avformat_network_deinit();
528
529     if (received_sigterm) {
530         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
531                (int) received_sigterm);
532     } else if (ret && transcode_init_done) {
533         av_log(NULL, AV_LOG_INFO, "Conversion failed!\n");
534     }
535     term_exit();
536 }
537
538 void remove_avoptions(AVDictionary **a, AVDictionary *b)
539 {
540     AVDictionaryEntry *t = NULL;
541
542     while ((t = av_dict_get(b, "", t, AV_DICT_IGNORE_SUFFIX))) {
543         av_dict_set(a, t->key, NULL, AV_DICT_MATCH_CASE);
544     }
545 }
546
547 void assert_avoptions(AVDictionary *m)
548 {
549     AVDictionaryEntry *t;
550     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
551         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
552         exit_program(1);
553     }
554 }
555
556 static void abort_codec_experimental(AVCodec *c, int encoder)
557 {
558     exit_program(1);
559 }
560
561 static void update_benchmark(const char *fmt, ...)
562 {
563     if (do_benchmark_all) {
564         int64_t t = getutime();
565         va_list va;
566         char buf[1024];
567
568         if (fmt) {
569             va_start(va, fmt);
570             vsnprintf(buf, sizeof(buf), fmt, va);
571             va_end(va);
572             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
573         }
574         current_time = t;
575     }
576 }
577
578 static void close_all_output_streams(OutputStream *ost, OSTFinished this_stream, OSTFinished others)
579 {
580     int i;
581     for (i = 0; i < nb_output_streams; i++) {
582         OutputStream *ost2 = output_streams[i];
583         ost2->finished |= ost == ost2 ? this_stream : others;
584     }
585 }
586
587 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
588 {
589     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
590     AVCodecContext          *avctx = ost->encoding_needed ? ost->enc_ctx : ost->st->codec;
591     int ret;
592
593     if (!ost->st->codec->extradata_size && ost->enc_ctx->extradata_size) {
594         ost->st->codec->extradata = av_mallocz(ost->enc_ctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
595         if (ost->st->codec->extradata) {
596             memcpy(ost->st->codec->extradata, ost->enc_ctx->extradata, ost->enc_ctx->extradata_size);
597             ost->st->codec->extradata_size = ost->enc_ctx->extradata_size;
598         }
599     }
600
601     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
602         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
603         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
604
605     /*
606      * Audio encoders may split the packets --  #frames in != #packets out.
607      * But there is no reordering, so we can limit the number of output packets
608      * by simply dropping them here.
609      * Counting encoded video frames needs to be done separately because of
610      * reordering, see do_video_out()
611      */
612     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
613         if (ost->frame_number >= ost->max_frames) {
614             av_free_packet(pkt);
615             return;
616         }
617         ost->frame_number++;
618     }
619
620     if (bsfc)
621         av_packet_split_side_data(pkt);
622
623     while (bsfc) {
624         AVPacket new_pkt = *pkt;
625         AVDictionaryEntry *bsf_arg = av_dict_get(ost->bsf_args,
626                                                  bsfc->filter->name,
627                                                  NULL, 0);
628         int a = av_bitstream_filter_filter(bsfc, avctx,
629                                            bsf_arg ? bsf_arg->value : NULL,
630                                            &new_pkt.data, &new_pkt.size,
631                                            pkt->data, pkt->size,
632                                            pkt->flags & AV_PKT_FLAG_KEY);
633         if(a == 0 && new_pkt.data != pkt->data && new_pkt.destruct) {
634             uint8_t *t = av_malloc(new_pkt.size + FF_INPUT_BUFFER_PADDING_SIZE); //the new should be a subset of the old so cannot overflow
635             if(t) {
636                 memcpy(t, new_pkt.data, new_pkt.size);
637                 memset(t + new_pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
638                 new_pkt.data = t;
639                 new_pkt.buf = NULL;
640                 a = 1;
641             } else
642                 a = AVERROR(ENOMEM);
643         }
644         if (a > 0) {
645             pkt->side_data = NULL;
646             pkt->side_data_elems = 0;
647             av_free_packet(pkt);
648             new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
649                                            av_buffer_default_free, NULL, 0);
650             if (!new_pkt.buf)
651                 exit_program(1);
652         } else if (a < 0) {
653             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
654                    bsfc->filter->name, pkt->stream_index,
655                    avctx->codec ? avctx->codec->name : "copy");
656             print_error("", a);
657             if (exit_on_error)
658                 exit_program(1);
659         }
660         *pkt = new_pkt;
661
662         bsfc = bsfc->next;
663     }
664
665     if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
666         if (pkt->dts != AV_NOPTS_VALUE &&
667             pkt->pts != AV_NOPTS_VALUE &&
668             pkt->dts > pkt->pts) {
669             av_log(s, AV_LOG_WARNING, "Invalid DTS: %"PRId64" PTS: %"PRId64" in output stream %d:%d, replacing by guess\n",
670                    pkt->dts, pkt->pts,
671                    ost->file_index, ost->st->index);
672             pkt->pts =
673             pkt->dts = pkt->pts + pkt->dts + ost->last_mux_dts + 1
674                      - FFMIN3(pkt->pts, pkt->dts, ost->last_mux_dts + 1)
675                      - FFMAX3(pkt->pts, pkt->dts, ost->last_mux_dts + 1);
676         }
677      if(
678         (avctx->codec_type == AVMEDIA_TYPE_AUDIO || avctx->codec_type == AVMEDIA_TYPE_VIDEO) &&
679         pkt->dts != AV_NOPTS_VALUE &&
680         ost->last_mux_dts != AV_NOPTS_VALUE) {
681       int64_t max = ost->last_mux_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
682       if (pkt->dts < max) {
683         int loglevel = max - pkt->dts > 2 || avctx->codec_type == AVMEDIA_TYPE_VIDEO ? AV_LOG_WARNING : AV_LOG_DEBUG;
684         av_log(s, loglevel, "Non-monotonous DTS in output stream "
685                "%d:%d; previous: %"PRId64", current: %"PRId64"; ",
686                ost->file_index, ost->st->index, ost->last_mux_dts, pkt->dts);
687         if (exit_on_error) {
688             av_log(NULL, AV_LOG_FATAL, "aborting.\n");
689             exit_program(1);
690         }
691         av_log(s, loglevel, "changing to %"PRId64". This may result "
692                "in incorrect timestamps in the output file.\n",
693                max);
694         if(pkt->pts >= pkt->dts)
695             pkt->pts = FFMAX(pkt->pts, max);
696         pkt->dts = max;
697       }
698      }
699     }
700     ost->last_mux_dts = pkt->dts;
701
702     ost->data_size += pkt->size;
703     ost->packets_written++;
704
705     pkt->stream_index = ost->index;
706
707     if (debug_ts) {
708         av_log(NULL, AV_LOG_INFO, "muxer <- type:%s "
709                 "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s size:%d\n",
710                 av_get_media_type_string(ost->enc_ctx->codec_type),
711                 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ost->st->time_base),
712                 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->st->time_base),
713                 pkt->size
714               );
715     }
716
717     ret = av_interleaved_write_frame(s, pkt);
718     if (ret < 0) {
719         print_error("av_interleaved_write_frame()", ret);
720         main_return_code = 1;
721         close_all_output_streams(ost, MUXER_FINISHED | ENCODER_FINISHED, ENCODER_FINISHED);
722     }
723     av_free_packet(pkt);
724 }
725
726 static void close_output_stream(OutputStream *ost)
727 {
728     OutputFile *of = output_files[ost->file_index];
729
730     ost->finished |= ENCODER_FINISHED;
731     if (of->shortest) {
732         int64_t end = av_rescale_q(ost->sync_opts - ost->first_pts, ost->enc_ctx->time_base, AV_TIME_BASE_Q);
733         of->recording_time = FFMIN(of->recording_time, end);
734     }
735 }
736
737 static int check_recording_time(OutputStream *ost)
738 {
739     OutputFile *of = output_files[ost->file_index];
740
741     if (of->recording_time != INT64_MAX &&
742         av_compare_ts(ost->sync_opts - ost->first_pts, ost->enc_ctx->time_base, of->recording_time,
743                       AV_TIME_BASE_Q) >= 0) {
744         close_output_stream(ost);
745         return 0;
746     }
747     return 1;
748 }
749
750 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
751                          AVFrame *frame)
752 {
753     AVCodecContext *enc = ost->enc_ctx;
754     AVPacket pkt;
755     int got_packet = 0;
756
757     av_init_packet(&pkt);
758     pkt.data = NULL;
759     pkt.size = 0;
760
761     if (!check_recording_time(ost))
762         return;
763
764     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
765         frame->pts = ost->sync_opts;
766     ost->sync_opts = frame->pts + frame->nb_samples;
767     ost->samples_encoded += frame->nb_samples;
768     ost->frames_encoded++;
769
770     av_assert0(pkt.size || !pkt.data);
771     update_benchmark(NULL);
772     if (debug_ts) {
773         av_log(NULL, AV_LOG_INFO, "encoder <- type:audio "
774                "frame_pts:%s frame_pts_time:%s time_base:%d/%d\n",
775                av_ts2str(frame->pts), av_ts2timestr(frame->pts, &enc->time_base),
776                enc->time_base.num, enc->time_base.den);
777     }
778
779     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
780         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
781         exit_program(1);
782     }
783     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
784
785     if (got_packet) {
786         av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
787
788         if (debug_ts) {
789             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
790                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
791                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
792                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
793         }
794
795         write_frame(s, &pkt, ost);
796     }
797 }
798
799 static void do_subtitle_out(AVFormatContext *s,
800                             OutputStream *ost,
801                             InputStream *ist,
802                             AVSubtitle *sub)
803 {
804     int subtitle_out_max_size = 1024 * 1024;
805     int subtitle_out_size, nb, i;
806     AVCodecContext *enc;
807     AVPacket pkt;
808     int64_t pts;
809
810     if (sub->pts == AV_NOPTS_VALUE) {
811         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
812         if (exit_on_error)
813             exit_program(1);
814         return;
815     }
816
817     enc = ost->enc_ctx;
818
819     if (!subtitle_out) {
820         subtitle_out = av_malloc(subtitle_out_max_size);
821         if (!subtitle_out) {
822             av_log(NULL, AV_LOG_FATAL, "Failed to allocate subtitle_out\n");
823             exit_program(1);
824         }
825     }
826
827     /* Note: DVB subtitle need one packet to draw them and one other
828        packet to clear them */
829     /* XXX: signal it in the codec context ? */
830     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
831         nb = 2;
832     else
833         nb = 1;
834
835     /* shift timestamp to honor -ss and make check_recording_time() work with -t */
836     pts = sub->pts;
837     if (output_files[ost->file_index]->start_time != AV_NOPTS_VALUE)
838         pts -= output_files[ost->file_index]->start_time;
839     for (i = 0; i < nb; i++) {
840         unsigned save_num_rects = sub->num_rects;
841
842         ost->sync_opts = av_rescale_q(pts, AV_TIME_BASE_Q, enc->time_base);
843         if (!check_recording_time(ost))
844             return;
845
846         sub->pts = pts;
847         // start_display_time is required to be 0
848         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
849         sub->end_display_time  -= sub->start_display_time;
850         sub->start_display_time = 0;
851         if (i == 1)
852             sub->num_rects = 0;
853
854         ost->frames_encoded++;
855
856         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
857                                                     subtitle_out_max_size, sub);
858         if (i == 1)
859             sub->num_rects = save_num_rects;
860         if (subtitle_out_size < 0) {
861             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
862             exit_program(1);
863         }
864
865         av_init_packet(&pkt);
866         pkt.data = subtitle_out;
867         pkt.size = subtitle_out_size;
868         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
869         pkt.duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->st->time_base);
870         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
871             /* XXX: the pts correction is handled here. Maybe handling
872                it in the codec would be better */
873             if (i == 0)
874                 pkt.pts += 90 * sub->start_display_time;
875             else
876                 pkt.pts += 90 * sub->end_display_time;
877         }
878         pkt.dts = pkt.pts;
879         write_frame(s, &pkt, ost);
880     }
881 }
882
883 static void do_video_out(AVFormatContext *s,
884                          OutputStream *ost,
885                          AVFrame *next_picture,
886                          double sync_ipts)
887 {
888     int ret, format_video_sync;
889     AVPacket pkt;
890     AVCodecContext *enc = ost->enc_ctx;
891     AVCodecContext *mux_enc = ost->st->codec;
892     int nb_frames, nb0_frames, i;
893     double delta, delta0;
894     double duration = 0;
895     int frame_size = 0;
896     InputStream *ist = NULL;
897     AVFilterContext *filter = ost->filter->filter;
898
899     if (ost->source_index >= 0)
900         ist = input_streams[ost->source_index];
901
902     if (filter->inputs[0]->frame_rate.num > 0 &&
903         filter->inputs[0]->frame_rate.den > 0)
904         duration = 1/(av_q2d(filter->inputs[0]->frame_rate) * av_q2d(enc->time_base));
905
906     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
907         duration = FFMIN(duration, 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base)));
908
909     if (!ost->filters_script &&
910         !ost->filters &&
911         next_picture &&
912         ist &&
913         lrintf(av_frame_get_pkt_duration(next_picture) * av_q2d(ist->st->time_base) / av_q2d(enc->time_base)) > 0) {
914         duration = lrintf(av_frame_get_pkt_duration(next_picture) * av_q2d(ist->st->time_base) / av_q2d(enc->time_base));
915     }
916
917     if (!next_picture) {
918         //end, flushing
919         nb0_frames = nb_frames = mid_pred(ost->last_nb0_frames[0],
920                                           ost->last_nb0_frames[1],
921                                           ost->last_nb0_frames[2]);
922     } else {
923         delta0 = sync_ipts - ost->sync_opts;
924         delta  = delta0 + duration;
925
926         /* by default, we output a single frame */
927         nb0_frames = 0;
928         nb_frames = 1;
929
930         format_video_sync = video_sync_method;
931         if (format_video_sync == VSYNC_AUTO) {
932             if(!strcmp(s->oformat->name, "avi")) {
933                 format_video_sync = VSYNC_VFR;
934             } else
935                 format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : VSYNC_CFR;
936             if (   ist
937                 && format_video_sync == VSYNC_CFR
938                 && input_files[ist->file_index]->ctx->nb_streams == 1
939                 && input_files[ist->file_index]->input_ts_offset == 0) {
940                 format_video_sync = VSYNC_VSCFR;
941             }
942             if (format_video_sync == VSYNC_CFR && copy_ts) {
943                 format_video_sync = VSYNC_VSCFR;
944             }
945         }
946
947         if (delta0 < 0 &&
948             delta > 0 &&
949             format_video_sync != VSYNC_PASSTHROUGH &&
950             format_video_sync != VSYNC_DROP) {
951             double cor = FFMIN(-delta0, duration);
952             if (delta0 < -0.6) {
953                 av_log(NULL, AV_LOG_WARNING, "Past duration %f too large\n", -delta0);
954             } else
955                 av_log(NULL, AV_LOG_DEBUG, "Cliping frame in rate conversion by %f\n", -delta0);
956             sync_ipts += cor;
957             duration -= cor;
958             delta0 += cor;
959         }
960
961         switch (format_video_sync) {
962         case VSYNC_VSCFR:
963             if (ost->frame_number == 0 && delta - duration >= 0.5) {
964                 av_log(NULL, AV_LOG_DEBUG, "Not duplicating %d initial frames\n", (int)lrintf(delta - duration));
965                 delta = duration;
966                 delta0 = 0;
967                 ost->sync_opts = lrint(sync_ipts);
968             }
969         case VSYNC_CFR:
970             // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
971             if (frame_drop_threshold && delta < frame_drop_threshold && ost->frame_number) {
972                 nb_frames = 0;
973             } else if (delta < -1.1)
974                 nb_frames = 0;
975             else if (delta > 1.1) {
976                 nb_frames = lrintf(delta);
977                 if (delta0 > 1.1)
978                     nb0_frames = lrintf(delta0 - 0.6);
979             }
980             break;
981         case VSYNC_VFR:
982             if (delta <= -0.6)
983                 nb_frames = 0;
984             else if (delta > 0.6)
985                 ost->sync_opts = lrint(sync_ipts);
986             break;
987         case VSYNC_DROP:
988         case VSYNC_PASSTHROUGH:
989             ost->sync_opts = lrint(sync_ipts);
990             break;
991         default:
992             av_assert0(0);
993         }
994     }
995
996     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
997     nb0_frames = FFMIN(nb0_frames, nb_frames);
998
999     memmove(ost->last_nb0_frames + 1,
1000             ost->last_nb0_frames,
1001             sizeof(ost->last_nb0_frames[0]) * (FF_ARRAY_ELEMS(ost->last_nb0_frames) - 1));
1002     ost->last_nb0_frames[0] = nb0_frames;
1003
1004     if (nb0_frames == 0 && ost->last_droped) {
1005         nb_frames_drop++;
1006         av_log(NULL, AV_LOG_VERBOSE,
1007                "*** dropping frame %d from stream %d at ts %"PRId64"\n",
1008                ost->frame_number, ost->st->index, ost->last_frame->pts);
1009     }
1010     if (nb_frames > (nb0_frames && ost->last_droped) + (nb_frames > nb0_frames)) {
1011         if (nb_frames > dts_error_threshold * 30) {
1012             av_log(NULL, AV_LOG_ERROR, "%d frame duplication too large, skipping\n", nb_frames - 1);
1013             nb_frames_drop++;
1014             return;
1015         }
1016         nb_frames_dup += nb_frames - (nb0_frames && ost->last_droped) - (nb_frames > nb0_frames);
1017         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
1018     }
1019     ost->last_droped = nb_frames == nb0_frames && next_picture;
1020
1021   /* duplicates frame if needed */
1022   for (i = 0; i < nb_frames; i++) {
1023     AVFrame *in_picture;
1024     av_init_packet(&pkt);
1025     pkt.data = NULL;
1026     pkt.size = 0;
1027
1028     if (i < nb0_frames && ost->last_frame) {
1029         in_picture = ost->last_frame;
1030     } else
1031         in_picture = next_picture;
1032
1033     if (!in_picture)
1034         return;
1035
1036     in_picture->pts = ost->sync_opts;
1037
1038 #if 1
1039     if (!check_recording_time(ost))
1040 #else
1041     if (ost->frame_number >= ost->max_frames)
1042 #endif
1043         return;
1044
1045     if (s->oformat->flags & AVFMT_RAWPICTURE &&
1046         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
1047         /* raw pictures are written as AVPicture structure to
1048            avoid any copies. We support temporarily the older
1049            method. */
1050         if (in_picture->interlaced_frame)
1051             mux_enc->field_order = in_picture->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
1052         else
1053             mux_enc->field_order = AV_FIELD_PROGRESSIVE;
1054         pkt.data   = (uint8_t *)in_picture;
1055         pkt.size   =  sizeof(AVPicture);
1056         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
1057         pkt.flags |= AV_PKT_FLAG_KEY;
1058
1059         write_frame(s, &pkt, ost);
1060     } else {
1061         int got_packet, forced_keyframe = 0;
1062         double pts_time;
1063
1064         if (enc->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME) &&
1065             ost->top_field_first >= 0)
1066             in_picture->top_field_first = !!ost->top_field_first;
1067
1068         if (in_picture->interlaced_frame) {
1069             if (enc->codec->id == AV_CODEC_ID_MJPEG)
1070                 mux_enc->field_order = in_picture->top_field_first ? AV_FIELD_TT:AV_FIELD_BB;
1071             else
1072                 mux_enc->field_order = in_picture->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
1073         } else
1074             mux_enc->field_order = AV_FIELD_PROGRESSIVE;
1075
1076         in_picture->quality = enc->global_quality;
1077         in_picture->pict_type = 0;
1078
1079         pts_time = in_picture->pts != AV_NOPTS_VALUE ?
1080             in_picture->pts * av_q2d(enc->time_base) : NAN;
1081         if (ost->forced_kf_index < ost->forced_kf_count &&
1082             in_picture->pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1083             ost->forced_kf_index++;
1084             forced_keyframe = 1;
1085         } else if (ost->forced_keyframes_pexpr) {
1086             double res;
1087             ost->forced_keyframes_expr_const_values[FKF_T] = pts_time;
1088             res = av_expr_eval(ost->forced_keyframes_pexpr,
1089                                ost->forced_keyframes_expr_const_values, NULL);
1090             av_dlog(NULL, "force_key_frame: n:%f n_forced:%f prev_forced_n:%f t:%f prev_forced_t:%f -> res:%f\n",
1091                     ost->forced_keyframes_expr_const_values[FKF_N],
1092                     ost->forced_keyframes_expr_const_values[FKF_N_FORCED],
1093                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N],
1094                     ost->forced_keyframes_expr_const_values[FKF_T],
1095                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T],
1096                     res);
1097             if (res) {
1098                 forced_keyframe = 1;
1099                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] =
1100                     ost->forced_keyframes_expr_const_values[FKF_N];
1101                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] =
1102                     ost->forced_keyframes_expr_const_values[FKF_T];
1103                 ost->forced_keyframes_expr_const_values[FKF_N_FORCED] += 1;
1104             }
1105
1106             ost->forced_keyframes_expr_const_values[FKF_N] += 1;
1107         } else if (   ost->forced_keyframes
1108                    && !strncmp(ost->forced_keyframes, "source", 6)
1109                    && in_picture->key_frame==1) {
1110             forced_keyframe = 1;
1111         }
1112
1113         if (forced_keyframe) {
1114             in_picture->pict_type = AV_PICTURE_TYPE_I;
1115             av_log(NULL, AV_LOG_DEBUG, "Forced keyframe at time %f\n", pts_time);
1116         }
1117
1118         update_benchmark(NULL);
1119         if (debug_ts) {
1120             av_log(NULL, AV_LOG_INFO, "encoder <- type:video "
1121                    "frame_pts:%s frame_pts_time:%s time_base:%d/%d\n",
1122                    av_ts2str(in_picture->pts), av_ts2timestr(in_picture->pts, &enc->time_base),
1123                    enc->time_base.num, enc->time_base.den);
1124         }
1125
1126         ost->frames_encoded++;
1127
1128         ret = avcodec_encode_video2(enc, &pkt, in_picture, &got_packet);
1129         update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
1130         if (ret < 0) {
1131             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1132             exit_program(1);
1133         }
1134
1135         if (got_packet) {
1136             if (debug_ts) {
1137                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1138                        "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1139                        av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &enc->time_base),
1140                        av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &enc->time_base));
1141             }
1142
1143             if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
1144                 pkt.pts = ost->sync_opts;
1145
1146             av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
1147
1148             if (debug_ts) {
1149                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1150                     "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1151                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1152                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1153             }
1154
1155             frame_size = pkt.size;
1156             write_frame(s, &pkt, ost);
1157
1158             /* if two pass, output log */
1159             if (ost->logfile && enc->stats_out) {
1160                 fprintf(ost->logfile, "%s", enc->stats_out);
1161             }
1162         }
1163     }
1164     ost->sync_opts++;
1165     /*
1166      * For video, number of frames in == number of packets out.
1167      * But there may be reordering, so we can't throw away frames on encoder
1168      * flush, we need to limit them here, before they go into encoder.
1169      */
1170     ost->frame_number++;
1171
1172     if (vstats_filename && frame_size)
1173         do_video_stats(ost, frame_size);
1174   }
1175
1176     if (!ost->last_frame)
1177         ost->last_frame = av_frame_alloc();
1178     av_frame_unref(ost->last_frame);
1179     if (next_picture)
1180         av_frame_ref(ost->last_frame, next_picture);
1181     else
1182         av_frame_free(&ost->last_frame);
1183 }
1184
1185 static double psnr(double d)
1186 {
1187     return -10.0 * log(d) / log(10.0);
1188 }
1189
1190 static void do_video_stats(OutputStream *ost, int frame_size)
1191 {
1192     AVCodecContext *enc;
1193     int frame_number;
1194     double ti1, bitrate, avg_bitrate;
1195
1196     /* this is executed just the first time do_video_stats is called */
1197     if (!vstats_file) {
1198         vstats_file = fopen(vstats_filename, "w");
1199         if (!vstats_file) {
1200             perror("fopen");
1201             exit_program(1);
1202         }
1203     }
1204
1205     enc = ost->enc_ctx;
1206     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1207         frame_number = ost->st->nb_frames;
1208         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame ? enc->coded_frame->quality / (float)FF_QP2LAMBDA : 0);
1209         if (enc->coded_frame && (enc->flags&CODEC_FLAG_PSNR))
1210             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1211
1212         fprintf(vstats_file,"f_size= %6d ", frame_size);
1213         /* compute pts value */
1214         ti1 = av_stream_get_end_pts(ost->st) * av_q2d(ost->st->time_base);
1215         if (ti1 < 0.01)
1216             ti1 = 0.01;
1217
1218         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1219         avg_bitrate = (double)(ost->data_size * 8) / ti1 / 1000.0;
1220         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1221                (double)ost->data_size / 1024, ti1, bitrate, avg_bitrate);
1222         fprintf(vstats_file, "type= %c\n", enc->coded_frame ? av_get_picture_type_char(enc->coded_frame->pict_type) : 'I');
1223     }
1224 }
1225
1226 static void finish_output_stream(OutputStream *ost)
1227 {
1228     OutputFile *of = output_files[ost->file_index];
1229     int i;
1230
1231     ost->finished = ENCODER_FINISHED | MUXER_FINISHED;
1232
1233     if (of->shortest) {
1234         for (i = 0; i < of->ctx->nb_streams; i++)
1235             output_streams[of->ost_index + i]->finished = ENCODER_FINISHED | MUXER_FINISHED;
1236     }
1237 }
1238
1239 /**
1240  * Get and encode new output from any of the filtergraphs, without causing
1241  * activity.
1242  *
1243  * @return  0 for success, <0 for severe errors
1244  */
1245 static int reap_filters(int flush)
1246 {
1247     AVFrame *filtered_frame = NULL;
1248     int i;
1249
1250     /* Reap all buffers present in the buffer sinks */
1251     for (i = 0; i < nb_output_streams; i++) {
1252         OutputStream *ost = output_streams[i];
1253         OutputFile    *of = output_files[ost->file_index];
1254         AVFilterContext *filter;
1255         AVCodecContext *enc = ost->enc_ctx;
1256         int ret = 0;
1257
1258         if (!ost->filter)
1259             continue;
1260         filter = ost->filter->filter;
1261
1262         if (!ost->filtered_frame && !(ost->filtered_frame = av_frame_alloc())) {
1263             return AVERROR(ENOMEM);
1264         }
1265         filtered_frame = ost->filtered_frame;
1266
1267         while (1) {
1268             double float_pts = AV_NOPTS_VALUE; // this is identical to filtered_frame.pts but with higher precision
1269             ret = av_buffersink_get_frame_flags(filter, filtered_frame,
1270                                                AV_BUFFERSINK_FLAG_NO_REQUEST);
1271             if (ret < 0) {
1272                 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1273                     av_log(NULL, AV_LOG_WARNING,
1274                            "Error in av_buffersink_get_frame_flags(): %s\n", av_err2str(ret));
1275                 } else if (flush && ret == AVERROR_EOF) {
1276                     if (filter->inputs[0]->type == AVMEDIA_TYPE_VIDEO)
1277                         do_video_out(of->ctx, ost, NULL, AV_NOPTS_VALUE);
1278                 }
1279                 break;
1280             }
1281             if (ost->finished) {
1282                 av_frame_unref(filtered_frame);
1283                 continue;
1284             }
1285             if (filtered_frame->pts != AV_NOPTS_VALUE) {
1286                 int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1287                 AVRational tb = enc->time_base;
1288                 int extra_bits = av_clip(29 - av_log2(tb.den), 0, 16);
1289
1290                 tb.den <<= extra_bits;
1291                 float_pts =
1292                     av_rescale_q(filtered_frame->pts, filter->inputs[0]->time_base, tb) -
1293                     av_rescale_q(start_time, AV_TIME_BASE_Q, tb);
1294                 float_pts /= 1 << extra_bits;
1295                 // avoid exact midoints to reduce the chance of rounding differences, this can be removed in case the fps code is changed to work with integers
1296                 float_pts += FFSIGN(float_pts) * 1.0 / (1<<17);
1297
1298                 filtered_frame->pts =
1299                     av_rescale_q(filtered_frame->pts, filter->inputs[0]->time_base, enc->time_base) -
1300                     av_rescale_q(start_time, AV_TIME_BASE_Q, enc->time_base);
1301             }
1302             //if (ost->source_index >= 0)
1303             //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1304
1305             switch (filter->inputs[0]->type) {
1306             case AVMEDIA_TYPE_VIDEO:
1307                 if (!ost->frame_aspect_ratio.num)
1308                     enc->sample_aspect_ratio = filtered_frame->sample_aspect_ratio;
1309
1310                 if (debug_ts) {
1311                     av_log(NULL, AV_LOG_INFO, "filter -> pts:%s pts_time:%s exact:%f time_base:%d/%d\n",
1312                             av_ts2str(filtered_frame->pts), av_ts2timestr(filtered_frame->pts, &enc->time_base),
1313                             float_pts,
1314                             enc->time_base.num, enc->time_base.den);
1315                 }
1316
1317                 do_video_out(of->ctx, ost, filtered_frame, float_pts);
1318                 break;
1319             case AVMEDIA_TYPE_AUDIO:
1320                 if (!(enc->codec->capabilities & CODEC_CAP_PARAM_CHANGE) &&
1321                     enc->channels != av_frame_get_channels(filtered_frame)) {
1322                     av_log(NULL, AV_LOG_ERROR,
1323                            "Audio filter graph output is not normalized and encoder does not support parameter changes\n");
1324                     break;
1325                 }
1326                 do_audio_out(of->ctx, ost, filtered_frame);
1327                 break;
1328             default:
1329                 // TODO support subtitle filters
1330                 av_assert0(0);
1331             }
1332
1333             av_frame_unref(filtered_frame);
1334         }
1335     }
1336
1337     return 0;
1338 }
1339
1340 static void print_final_stats(int64_t total_size)
1341 {
1342     uint64_t video_size = 0, audio_size = 0, extra_size = 0, other_size = 0;
1343     uint64_t subtitle_size = 0;
1344     uint64_t data_size = 0;
1345     float percent = -1.0;
1346     int i, j;
1347     int pass1_used = 1;
1348
1349     for (i = 0; i < nb_output_streams; i++) {
1350         OutputStream *ost = output_streams[i];
1351         switch (ost->enc_ctx->codec_type) {
1352             case AVMEDIA_TYPE_VIDEO: video_size += ost->data_size; break;
1353             case AVMEDIA_TYPE_AUDIO: audio_size += ost->data_size; break;
1354             case AVMEDIA_TYPE_SUBTITLE: subtitle_size += ost->data_size; break;
1355             default:                 other_size += ost->data_size; break;
1356         }
1357         extra_size += ost->enc_ctx->extradata_size;
1358         data_size  += ost->data_size;
1359         if (   (ost->enc_ctx->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))
1360             != CODEC_FLAG_PASS1)
1361             pass1_used = 0;
1362     }
1363
1364     if (data_size && total_size>0 && total_size >= data_size)
1365         percent = 100.0 * (total_size - data_size) / data_size;
1366
1367     av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB subtitle:%1.0fkB other streams:%1.0fkB global headers:%1.0fkB muxing overhead: ",
1368            video_size / 1024.0,
1369            audio_size / 1024.0,
1370            subtitle_size / 1024.0,
1371            other_size / 1024.0,
1372            extra_size / 1024.0);
1373     if (percent >= 0.0)
1374         av_log(NULL, AV_LOG_INFO, "%f%%", percent);
1375     else
1376         av_log(NULL, AV_LOG_INFO, "unknown");
1377     av_log(NULL, AV_LOG_INFO, "\n");
1378
1379     /* print verbose per-stream stats */
1380     for (i = 0; i < nb_input_files; i++) {
1381         InputFile *f = input_files[i];
1382         uint64_t total_packets = 0, total_size = 0;
1383
1384         av_log(NULL, AV_LOG_VERBOSE, "Input file #%d (%s):\n",
1385                i, f->ctx->filename);
1386
1387         for (j = 0; j < f->nb_streams; j++) {
1388             InputStream *ist = input_streams[f->ist_index + j];
1389             enum AVMediaType type = ist->dec_ctx->codec_type;
1390
1391             total_size    += ist->data_size;
1392             total_packets += ist->nb_packets;
1393
1394             av_log(NULL, AV_LOG_VERBOSE, "  Input stream #%d:%d (%s): ",
1395                    i, j, media_type_string(type));
1396             av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" packets read (%"PRIu64" bytes); ",
1397                    ist->nb_packets, ist->data_size);
1398
1399             if (ist->decoding_needed) {
1400                 av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" frames decoded",
1401                        ist->frames_decoded);
1402                 if (type == AVMEDIA_TYPE_AUDIO)
1403                     av_log(NULL, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ist->samples_decoded);
1404                 av_log(NULL, AV_LOG_VERBOSE, "; ");
1405             }
1406
1407             av_log(NULL, AV_LOG_VERBOSE, "\n");
1408         }
1409
1410         av_log(NULL, AV_LOG_VERBOSE, "  Total: %"PRIu64" packets (%"PRIu64" bytes) demuxed\n",
1411                total_packets, total_size);
1412     }
1413
1414     for (i = 0; i < nb_output_files; i++) {
1415         OutputFile *of = output_files[i];
1416         uint64_t total_packets = 0, total_size = 0;
1417
1418         av_log(NULL, AV_LOG_VERBOSE, "Output file #%d (%s):\n",
1419                i, of->ctx->filename);
1420
1421         for (j = 0; j < of->ctx->nb_streams; j++) {
1422             OutputStream *ost = output_streams[of->ost_index + j];
1423             enum AVMediaType type = ost->enc_ctx->codec_type;
1424
1425             total_size    += ost->data_size;
1426             total_packets += ost->packets_written;
1427
1428             av_log(NULL, AV_LOG_VERBOSE, "  Output stream #%d:%d (%s): ",
1429                    i, j, media_type_string(type));
1430             if (ost->encoding_needed) {
1431                 av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" frames encoded",
1432                        ost->frames_encoded);
1433                 if (type == AVMEDIA_TYPE_AUDIO)
1434                     av_log(NULL, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ost->samples_encoded);
1435                 av_log(NULL, AV_LOG_VERBOSE, "; ");
1436             }
1437
1438             av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" packets muxed (%"PRIu64" bytes); ",
1439                    ost->packets_written, ost->data_size);
1440
1441             av_log(NULL, AV_LOG_VERBOSE, "\n");
1442         }
1443
1444         av_log(NULL, AV_LOG_VERBOSE, "  Total: %"PRIu64" packets (%"PRIu64" bytes) muxed\n",
1445                total_packets, total_size);
1446     }
1447     if(video_size + data_size + audio_size + subtitle_size + extra_size == 0){
1448         av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded ");
1449         if (pass1_used) {
1450             av_log(NULL, AV_LOG_WARNING, "\n");
1451         } else {
1452             av_log(NULL, AV_LOG_WARNING, "(check -ss / -t / -frames parameters if used)\n");
1453         }
1454     }
1455 }
1456
1457 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
1458 {
1459     char buf[1024];
1460     AVBPrint buf_script;
1461     OutputStream *ost;
1462     AVFormatContext *oc;
1463     int64_t total_size;
1464     AVCodecContext *enc;
1465     int frame_number, vid, i;
1466     double bitrate;
1467     int64_t pts = INT64_MIN;
1468     static int64_t last_time = -1;
1469     static int qp_histogram[52];
1470     int hours, mins, secs, us;
1471
1472     if (!print_stats && !is_last_report && !progress_avio)
1473         return;
1474
1475     if (!is_last_report) {
1476         if (last_time == -1) {
1477             last_time = cur_time;
1478             return;
1479         }
1480         if ((cur_time - last_time) < 500000)
1481             return;
1482         last_time = cur_time;
1483     }
1484
1485
1486     oc = output_files[0]->ctx;
1487
1488     total_size = avio_size(oc->pb);
1489     if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
1490         total_size = avio_tell(oc->pb);
1491
1492     buf[0] = '\0';
1493     vid = 0;
1494     av_bprint_init(&buf_script, 0, 1);
1495     for (i = 0; i < nb_output_streams; i++) {
1496         float q = -1;
1497         ost = output_streams[i];
1498         enc = ost->enc_ctx;
1499         if (!ost->stream_copy && enc->coded_frame)
1500             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1501         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1502             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1503             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1504                        ost->file_index, ost->index, q);
1505         }
1506         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1507             float fps, t = (cur_time-timer_start) / 1000000.0;
1508
1509             frame_number = ost->frame_number;
1510             fps = t > 1 ? frame_number / t : 0;
1511             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
1512                      frame_number, fps < 9.95, fps, q);
1513             av_bprintf(&buf_script, "frame=%d\n", frame_number);
1514             av_bprintf(&buf_script, "fps=%.1f\n", fps);
1515             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1516                        ost->file_index, ost->index, q);
1517             if (is_last_report)
1518                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1519             if (qp_hist) {
1520                 int j;
1521                 int qp = lrintf(q);
1522                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1523                     qp_histogram[qp]++;
1524                 for (j = 0; j < 32; j++)
1525                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
1526             }
1527             if ((enc->flags&CODEC_FLAG_PSNR) && (enc->coded_frame || is_last_report)) {
1528                 int j;
1529                 double error, error_sum = 0;
1530                 double scale, scale_sum = 0;
1531                 double p;
1532                 char type[3] = { 'Y','U','V' };
1533                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1534                 for (j = 0; j < 3; j++) {
1535                     if (is_last_report) {
1536                         error = enc->error[j];
1537                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1538                     } else {
1539                         error = enc->coded_frame->error[j];
1540                         scale = enc->width * enc->height * 255.0 * 255.0;
1541                     }
1542                     if (j)
1543                         scale /= 4;
1544                     error_sum += error;
1545                     scale_sum += scale;
1546                     p = psnr(error / scale);
1547                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], p);
1548                     av_bprintf(&buf_script, "stream_%d_%d_psnr_%c=%2.2f\n",
1549                                ost->file_index, ost->index, type[j] | 32, p);
1550                 }
1551                 p = psnr(error_sum / scale_sum);
1552                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1553                 av_bprintf(&buf_script, "stream_%d_%d_psnr_all=%2.2f\n",
1554                            ost->file_index, ost->index, p);
1555             }
1556             vid = 1;
1557         }
1558         /* compute min output value */
1559         if (av_stream_get_end_pts(ost->st) != AV_NOPTS_VALUE)
1560             pts = FFMAX(pts, av_rescale_q(av_stream_get_end_pts(ost->st),
1561                                           ost->st->time_base, AV_TIME_BASE_Q));
1562         if (is_last_report)
1563             nb_frames_drop += ost->last_droped;
1564     }
1565
1566     secs = FFABS(pts) / AV_TIME_BASE;
1567     us = FFABS(pts) % AV_TIME_BASE;
1568     mins = secs / 60;
1569     secs %= 60;
1570     hours = mins / 60;
1571     mins %= 60;
1572
1573     bitrate = pts && total_size >= 0 ? total_size * 8 / (pts / 1000.0) : -1;
1574
1575     if (total_size < 0) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1576                                  "size=N/A time=");
1577     else                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1578                                  "size=%8.0fkB time=", total_size / 1024.0);
1579     if (pts < 0)
1580         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "-");
1581     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1582              "%02d:%02d:%02d.%02d ", hours, mins, secs,
1583              (100 * us) / AV_TIME_BASE);
1584
1585     if (bitrate < 0) {
1586         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),"bitrate=N/A");
1587         av_bprintf(&buf_script, "bitrate=N/A\n");
1588     }else{
1589         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),"bitrate=%6.1fkbits/s", bitrate);
1590         av_bprintf(&buf_script, "bitrate=%6.1fkbits/s\n", bitrate);
1591     }
1592
1593     if (total_size < 0) av_bprintf(&buf_script, "total_size=N/A\n");
1594     else                av_bprintf(&buf_script, "total_size=%"PRId64"\n", total_size);
1595     av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
1596     av_bprintf(&buf_script, "out_time=%02d:%02d:%02d.%06d\n",
1597                hours, mins, secs, us);
1598
1599     if (nb_frames_dup || nb_frames_drop)
1600         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1601                 nb_frames_dup, nb_frames_drop);
1602     av_bprintf(&buf_script, "dup_frames=%d\n", nb_frames_dup);
1603     av_bprintf(&buf_script, "drop_frames=%d\n", nb_frames_drop);
1604
1605     if (print_stats || is_last_report) {
1606         const char end = is_last_report ? '\n' : '\r';
1607         if (print_stats==1 && AV_LOG_INFO > av_log_get_level()) {
1608             fprintf(stderr, "%s    %c", buf, end);
1609         } else
1610             av_log(NULL, AV_LOG_INFO, "%s    %c", buf, end);
1611
1612     fflush(stderr);
1613     }
1614
1615     if (progress_avio) {
1616         av_bprintf(&buf_script, "progress=%s\n",
1617                    is_last_report ? "end" : "continue");
1618         avio_write(progress_avio, buf_script.str,
1619                    FFMIN(buf_script.len, buf_script.size - 1));
1620         avio_flush(progress_avio);
1621         av_bprint_finalize(&buf_script, NULL);
1622         if (is_last_report) {
1623             avio_closep(&progress_avio);
1624         }
1625     }
1626
1627     if (is_last_report)
1628         print_final_stats(total_size);
1629 }
1630
1631 static void flush_encoders(void)
1632 {
1633     int i, ret;
1634
1635     for (i = 0; i < nb_output_streams; i++) {
1636         OutputStream   *ost = output_streams[i];
1637         AVCodecContext *enc = ost->enc_ctx;
1638         AVFormatContext *os = output_files[ost->file_index]->ctx;
1639         int stop_encoding = 0;
1640
1641         if (!ost->encoding_needed)
1642             continue;
1643
1644         if (enc->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1645             continue;
1646         if (enc->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
1647             continue;
1648
1649         for (;;) {
1650             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1651             const char *desc;
1652
1653             switch (enc->codec_type) {
1654             case AVMEDIA_TYPE_AUDIO:
1655                 encode = avcodec_encode_audio2;
1656                 desc   = "Audio";
1657                 break;
1658             case AVMEDIA_TYPE_VIDEO:
1659                 encode = avcodec_encode_video2;
1660                 desc   = "Video";
1661                 break;
1662             default:
1663                 stop_encoding = 1;
1664             }
1665
1666             if (encode) {
1667                 AVPacket pkt;
1668                 int pkt_size;
1669                 int got_packet;
1670                 av_init_packet(&pkt);
1671                 pkt.data = NULL;
1672                 pkt.size = 0;
1673
1674                 update_benchmark(NULL);
1675                 ret = encode(enc, &pkt, NULL, &got_packet);
1676                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
1677                 if (ret < 0) {
1678                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1679                     exit_program(1);
1680                 }
1681                 if (ost->logfile && enc->stats_out) {
1682                     fprintf(ost->logfile, "%s", enc->stats_out);
1683                 }
1684                 if (!got_packet) {
1685                     stop_encoding = 1;
1686                     break;
1687                 }
1688                 if (ost->finished & MUXER_FINISHED) {
1689                     av_free_packet(&pkt);
1690                     continue;
1691                 }
1692                 av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
1693                 pkt_size = pkt.size;
1694                 write_frame(os, &pkt, ost);
1695                 if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO && vstats_filename) {
1696                     do_video_stats(ost, pkt_size);
1697                 }
1698             }
1699
1700             if (stop_encoding)
1701                 break;
1702         }
1703     }
1704 }
1705
1706 /*
1707  * Check whether a packet from ist should be written into ost at this time
1708  */
1709 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1710 {
1711     OutputFile *of = output_files[ost->file_index];
1712     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1713
1714     if (ost->source_index != ist_index)
1715         return 0;
1716
1717     if (ost->finished)
1718         return 0;
1719
1720     if (of->start_time != AV_NOPTS_VALUE && ist->pts < of->start_time)
1721         return 0;
1722
1723     return 1;
1724 }
1725
1726 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1727 {
1728     OutputFile *of = output_files[ost->file_index];
1729     InputFile   *f = input_files [ist->file_index];
1730     int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1731     int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);
1732     int64_t ist_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ist->st->time_base);
1733     AVPicture pict;
1734     AVPacket opkt;
1735
1736     av_init_packet(&opkt);
1737
1738     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1739         !ost->copy_initial_nonkeyframes)
1740         return;
1741
1742     if (pkt->pts == AV_NOPTS_VALUE) {
1743         if (!ost->frame_number && ist->pts < start_time &&
1744             !ost->copy_prior_start)
1745             return;
1746     } else {
1747         if (!ost->frame_number && pkt->pts < ist_tb_start_time &&
1748             !ost->copy_prior_start)
1749             return;
1750     }
1751
1752     if (of->recording_time != INT64_MAX &&
1753         ist->pts >= of->recording_time + start_time) {
1754         close_output_stream(ost);
1755         return;
1756     }
1757
1758     if (f->recording_time != INT64_MAX) {
1759         start_time = f->ctx->start_time;
1760         if (f->start_time != AV_NOPTS_VALUE)
1761             start_time += f->start_time;
1762         if (ist->pts >= f->recording_time + start_time) {
1763             close_output_stream(ost);
1764             return;
1765         }
1766     }
1767
1768     /* force the input stream PTS */
1769     if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO)
1770         ost->sync_opts++;
1771
1772     if (pkt->pts != AV_NOPTS_VALUE)
1773         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1774     else
1775         opkt.pts = AV_NOPTS_VALUE;
1776
1777     if (pkt->dts == AV_NOPTS_VALUE)
1778         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
1779     else
1780         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1781     opkt.dts -= ost_tb_start_time;
1782
1783     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1784         int duration = av_get_audio_frame_duration(ist->dec_ctx, pkt->size);
1785         if(!duration)
1786             duration = ist->dec_ctx->frame_size;
1787         opkt.dts = opkt.pts = av_rescale_delta(ist->st->time_base, pkt->dts,
1788                                                (AVRational){1, ist->dec_ctx->sample_rate}, duration, &ist->filter_in_rescale_delta_last,
1789                                                ost->st->time_base) - ost_tb_start_time;
1790     }
1791
1792     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1793     opkt.flags    = pkt->flags;
1794
1795     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1796     if (  ost->enc_ctx->codec_id != AV_CODEC_ID_H264
1797        && ost->enc_ctx->codec_id != AV_CODEC_ID_MPEG1VIDEO
1798        && ost->enc_ctx->codec_id != AV_CODEC_ID_MPEG2VIDEO
1799        && ost->enc_ctx->codec_id != AV_CODEC_ID_VC1
1800        ) {
1801         if (av_parser_change(ost->parser, ost->st->codec,
1802                              &opkt.data, &opkt.size,
1803                              pkt->data, pkt->size,
1804                              pkt->flags & AV_PKT_FLAG_KEY)) {
1805             opkt.buf = av_buffer_create(opkt.data, opkt.size, av_buffer_default_free, NULL, 0);
1806             if (!opkt.buf)
1807                 exit_program(1);
1808         }
1809     } else {
1810         opkt.data = pkt->data;
1811         opkt.size = pkt->size;
1812     }
1813     av_copy_packet_side_data(&opkt, pkt);
1814
1815     if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (of->ctx->oformat->flags & AVFMT_RAWPICTURE)) {
1816         /* store AVPicture in AVPacket, as expected by the output format */
1817         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
1818         opkt.data = (uint8_t *)&pict;
1819         opkt.size = sizeof(AVPicture);
1820         opkt.flags |= AV_PKT_FLAG_KEY;
1821     }
1822
1823     write_frame(of->ctx, &opkt, ost);
1824 }
1825
1826 int guess_input_channel_layout(InputStream *ist)
1827 {
1828     AVCodecContext *dec = ist->dec_ctx;
1829
1830     if (!dec->channel_layout) {
1831         char layout_name[256];
1832
1833         if (dec->channels > ist->guess_layout_max)
1834             return 0;
1835         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1836         if (!dec->channel_layout)
1837             return 0;
1838         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1839                                      dec->channels, dec->channel_layout);
1840         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1841                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1842     }
1843     return 1;
1844 }
1845
1846 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1847 {
1848     AVFrame *decoded_frame, *f;
1849     AVCodecContext *avctx = ist->dec_ctx;
1850     int i, ret, err = 0, resample_changed;
1851     AVRational decoded_frame_tb;
1852
1853     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1854         return AVERROR(ENOMEM);
1855     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1856         return AVERROR(ENOMEM);
1857     decoded_frame = ist->decoded_frame;
1858
1859     update_benchmark(NULL);
1860     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1861     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
1862
1863     if (ret >= 0 && avctx->sample_rate <= 0) {
1864         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
1865         ret = AVERROR_INVALIDDATA;
1866     }
1867
1868     if (*got_output || ret<0 || pkt->size)
1869         decode_error_stat[ret<0] ++;
1870
1871     if (!*got_output || ret < 0) {
1872         if (!pkt->size) {
1873             for (i = 0; i < ist->nb_filters; i++)
1874 #if 1
1875                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1876 #else
1877                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
1878 #endif
1879         }
1880         return ret;
1881     }
1882
1883     ist->samples_decoded += decoded_frame->nb_samples;
1884     ist->frames_decoded++;
1885
1886 #if 1
1887     /* increment next_dts to use for the case where the input stream does not
1888        have timestamps or there are multiple frames in the packet */
1889     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1890                      avctx->sample_rate;
1891     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1892                      avctx->sample_rate;
1893 #endif
1894
1895     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1896                        ist->resample_channels       != avctx->channels               ||
1897                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1898                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1899     if (resample_changed) {
1900         char layout1[64], layout2[64];
1901
1902         if (!guess_input_channel_layout(ist)) {
1903             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1904                    "layout for Input Stream #%d.%d\n", ist->file_index,
1905                    ist->st->index);
1906             exit_program(1);
1907         }
1908         decoded_frame->channel_layout = avctx->channel_layout;
1909
1910         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1911                                      ist->resample_channel_layout);
1912         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1913                                      decoded_frame->channel_layout);
1914
1915         av_log(NULL, AV_LOG_INFO,
1916                "Input stream #%d:%d frame changed from rate:%d fmt:%s ch:%d chl:%s to rate:%d fmt:%s ch:%d chl:%s\n",
1917                ist->file_index, ist->st->index,
1918                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1919                ist->resample_channels, layout1,
1920                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1921                avctx->channels, layout2);
1922
1923         ist->resample_sample_fmt     = decoded_frame->format;
1924         ist->resample_sample_rate    = decoded_frame->sample_rate;
1925         ist->resample_channel_layout = decoded_frame->channel_layout;
1926         ist->resample_channels       = avctx->channels;
1927
1928         for (i = 0; i < nb_filtergraphs; i++)
1929             if (ist_in_filtergraph(filtergraphs[i], ist)) {
1930                 FilterGraph *fg = filtergraphs[i];
1931                 if (configure_filtergraph(fg) < 0) {
1932                     av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1933                     exit_program(1);
1934                 }
1935             }
1936     }
1937
1938     /* if the decoder provides a pts, use it instead of the last packet pts.
1939        the decoder could be delaying output by a packet or more. */
1940     if (decoded_frame->pts != AV_NOPTS_VALUE) {
1941         ist->dts = ist->next_dts = ist->pts = ist->next_pts = av_rescale_q(decoded_frame->pts, avctx->time_base, AV_TIME_BASE_Q);
1942         decoded_frame_tb   = avctx->time_base;
1943     } else if (decoded_frame->pkt_pts != AV_NOPTS_VALUE) {
1944         decoded_frame->pts = decoded_frame->pkt_pts;
1945         decoded_frame_tb   = ist->st->time_base;
1946     } else if (pkt->pts != AV_NOPTS_VALUE) {
1947         decoded_frame->pts = pkt->pts;
1948         decoded_frame_tb   = ist->st->time_base;
1949     }else {
1950         decoded_frame->pts = ist->dts;
1951         decoded_frame_tb   = AV_TIME_BASE_Q;
1952     }
1953     pkt->pts           = AV_NOPTS_VALUE;
1954     if (decoded_frame->pts != AV_NOPTS_VALUE)
1955         decoded_frame->pts = av_rescale_delta(decoded_frame_tb, decoded_frame->pts,
1956                                               (AVRational){1, avctx->sample_rate}, decoded_frame->nb_samples, &ist->filter_in_rescale_delta_last,
1957                                               (AVRational){1, avctx->sample_rate});
1958     for (i = 0; i < ist->nb_filters; i++) {
1959         if (i < ist->nb_filters - 1) {
1960             f = ist->filter_frame;
1961             err = av_frame_ref(f, decoded_frame);
1962             if (err < 0)
1963                 break;
1964         } else
1965             f = decoded_frame;
1966         err = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f,
1967                                      AV_BUFFERSRC_FLAG_PUSH);
1968         if (err == AVERROR_EOF)
1969             err = 0; /* ignore */
1970         if (err < 0)
1971             break;
1972     }
1973     decoded_frame->pts = AV_NOPTS_VALUE;
1974
1975     av_frame_unref(ist->filter_frame);
1976     av_frame_unref(decoded_frame);
1977     return err < 0 ? err : ret;
1978 }
1979
1980 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1981 {
1982     AVFrame *decoded_frame, *f;
1983     int i, ret = 0, err = 0, resample_changed;
1984     int64_t best_effort_timestamp;
1985     AVRational *frame_sample_aspect;
1986
1987     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1988         return AVERROR(ENOMEM);
1989     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1990         return AVERROR(ENOMEM);
1991     decoded_frame = ist->decoded_frame;
1992     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
1993
1994     update_benchmark(NULL);
1995     ret = avcodec_decode_video2(ist->dec_ctx,
1996                                 decoded_frame, got_output, pkt);
1997     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
1998
1999     // The following line may be required in some cases where there is no parser
2000     // or the parser does not has_b_frames correctly
2001     if (ist->st->codec->has_b_frames < ist->dec_ctx->has_b_frames) {
2002         if (ist->dec_ctx->codec_id == AV_CODEC_ID_H264) {
2003             ist->st->codec->has_b_frames = ist->dec_ctx->has_b_frames;
2004         } else
2005             av_log_ask_for_sample(
2006                 ist->dec_ctx,
2007                 "has_b_frames is larger in decoder than demuxer %d > %d ",
2008                 ist->dec_ctx->has_b_frames,
2009                 ist->st->codec->has_b_frames
2010             );
2011     }
2012
2013     if (*got_output || ret<0 || pkt->size)
2014         decode_error_stat[ret<0] ++;
2015
2016     if (*got_output && ret >= 0) {
2017         if (ist->dec_ctx->width  != decoded_frame->width ||
2018             ist->dec_ctx->height != decoded_frame->height ||
2019             ist->dec_ctx->pix_fmt != decoded_frame->format) {
2020             av_log(NULL, AV_LOG_DEBUG, "Frame parameters mismatch context %d,%d,%d != %d,%d,%d\n",
2021                 decoded_frame->width,
2022                 decoded_frame->height,
2023                 decoded_frame->format,
2024                 ist->dec_ctx->width,
2025                 ist->dec_ctx->height,
2026                 ist->dec_ctx->pix_fmt);
2027         }
2028     }
2029
2030     if (!*got_output || ret < 0) {
2031         if (!pkt->size) {
2032             for (i = 0; i < ist->nb_filters; i++)
2033 #if 1
2034                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
2035 #else
2036                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
2037 #endif
2038         }
2039         return ret;
2040     }
2041
2042     if(ist->top_field_first>=0)
2043         decoded_frame->top_field_first = ist->top_field_first;
2044
2045     ist->frames_decoded++;
2046
2047     if (ist->hwaccel_retrieve_data && decoded_frame->format == ist->hwaccel_pix_fmt) {
2048         err = ist->hwaccel_retrieve_data(ist->dec_ctx, decoded_frame);
2049         if (err < 0)
2050             goto fail;
2051     }
2052     ist->hwaccel_retrieved_pix_fmt = decoded_frame->format;
2053
2054     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
2055     if(best_effort_timestamp != AV_NOPTS_VALUE)
2056         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
2057
2058     if (debug_ts) {
2059         av_log(NULL, AV_LOG_INFO, "decoder -> ist_index:%d type:video "
2060                "frame_pts:%s frame_pts_time:%s best_effort_ts:%"PRId64" best_effort_ts_time:%s keyframe:%d frame_type:%d time_base:%d/%d\n",
2061                ist->st->index, av_ts2str(decoded_frame->pts),
2062                av_ts2timestr(decoded_frame->pts, &ist->st->time_base),
2063                best_effort_timestamp,
2064                av_ts2timestr(best_effort_timestamp, &ist->st->time_base),
2065                decoded_frame->key_frame, decoded_frame->pict_type,
2066                ist->st->time_base.num, ist->st->time_base.den);
2067     }
2068
2069     pkt->size = 0;
2070
2071     if (ist->st->sample_aspect_ratio.num)
2072         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2073
2074     resample_changed = ist->resample_width   != decoded_frame->width  ||
2075                        ist->resample_height  != decoded_frame->height ||
2076                        ist->resample_pix_fmt != decoded_frame->format;
2077     if (resample_changed) {
2078         av_log(NULL, AV_LOG_INFO,
2079                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2080                ist->file_index, ist->st->index,
2081                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2082                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2083
2084         ist->resample_width   = decoded_frame->width;
2085         ist->resample_height  = decoded_frame->height;
2086         ist->resample_pix_fmt = decoded_frame->format;
2087
2088         for (i = 0; i < nb_filtergraphs; i++) {
2089             if (ist_in_filtergraph(filtergraphs[i], ist) && ist->reinit_filters &&
2090                 configure_filtergraph(filtergraphs[i]) < 0) {
2091                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2092                 exit_program(1);
2093             }
2094         }
2095     }
2096
2097     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2098     for (i = 0; i < ist->nb_filters; i++) {
2099         if (!frame_sample_aspect->num)
2100             *frame_sample_aspect = ist->st->sample_aspect_ratio;
2101
2102         if (i < ist->nb_filters - 1) {
2103             f = ist->filter_frame;
2104             err = av_frame_ref(f, decoded_frame);
2105             if (err < 0)
2106                 break;
2107         } else
2108             f = decoded_frame;
2109         ret = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f, AV_BUFFERSRC_FLAG_PUSH);
2110         if (ret == AVERROR_EOF) {
2111             ret = 0; /* ignore */
2112         } else if (ret < 0) {
2113             av_log(NULL, AV_LOG_FATAL,
2114                    "Failed to inject frame into filter network: %s\n", av_err2str(ret));
2115             exit_program(1);
2116         }
2117     }
2118
2119 fail:
2120     av_frame_unref(ist->filter_frame);
2121     av_frame_unref(decoded_frame);
2122     return err < 0 ? err : ret;
2123 }
2124
2125 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2126 {
2127     AVSubtitle subtitle;
2128     int i, ret = avcodec_decode_subtitle2(ist->dec_ctx,
2129                                           &subtitle, got_output, pkt);
2130
2131     if (*got_output || ret<0 || pkt->size)
2132         decode_error_stat[ret<0] ++;
2133
2134     if (ret < 0 || !*got_output) {
2135         if (!pkt->size)
2136             sub2video_flush(ist);
2137         return ret;
2138     }
2139
2140     if (ist->fix_sub_duration) {
2141         int end = 1;
2142         if (ist->prev_sub.got_output) {
2143             end = av_rescale(subtitle.pts - ist->prev_sub.subtitle.pts,
2144                              1000, AV_TIME_BASE);
2145             if (end < ist->prev_sub.subtitle.end_display_time) {
2146                 av_log(ist->dec_ctx, AV_LOG_DEBUG,
2147                        "Subtitle duration reduced from %d to %d%s\n",
2148                        ist->prev_sub.subtitle.end_display_time, end,
2149                        end <= 0 ? ", dropping it" : "");
2150                 ist->prev_sub.subtitle.end_display_time = end;
2151             }
2152         }
2153         FFSWAP(int,        *got_output, ist->prev_sub.got_output);
2154         FFSWAP(int,        ret,         ist->prev_sub.ret);
2155         FFSWAP(AVSubtitle, subtitle,    ist->prev_sub.subtitle);
2156         if (end <= 0)
2157             goto out;
2158     }
2159
2160     if (!*got_output)
2161         return ret;
2162
2163     sub2video_update(ist, &subtitle);
2164
2165     if (!subtitle.num_rects)
2166         goto out;
2167
2168     ist->frames_decoded++;
2169
2170     for (i = 0; i < nb_output_streams; i++) {
2171         OutputStream *ost = output_streams[i];
2172
2173         if (!check_output_constraints(ist, ost) || !ost->encoding_needed
2174             || ost->enc->type != AVMEDIA_TYPE_SUBTITLE)
2175             continue;
2176
2177         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle);
2178     }
2179
2180 out:
2181     avsubtitle_free(&subtitle);
2182     return ret;
2183 }
2184
2185 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2186 static int process_input_packet(InputStream *ist, const AVPacket *pkt)
2187 {
2188     int ret = 0, i;
2189     int got_output = 0;
2190
2191     AVPacket avpkt;
2192     if (!ist->saw_first_ts) {
2193         ist->dts = ist->st->avg_frame_rate.num ? - ist->dec_ctx->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
2194         ist->pts = 0;
2195         if (pkt && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
2196             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2197             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
2198         }
2199         ist->saw_first_ts = 1;
2200     }
2201
2202     if (ist->next_dts == AV_NOPTS_VALUE)
2203         ist->next_dts = ist->dts;
2204     if (ist->next_pts == AV_NOPTS_VALUE)
2205         ist->next_pts = ist->pts;
2206
2207     if (!pkt) {
2208         /* EOF handling */
2209         av_init_packet(&avpkt);
2210         avpkt.data = NULL;
2211         avpkt.size = 0;
2212         goto handle_eof;
2213     } else {
2214         avpkt = *pkt;
2215     }
2216
2217     if (pkt->dts != AV_NOPTS_VALUE) {
2218         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2219         if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2220             ist->next_pts = ist->pts = ist->dts;
2221     }
2222
2223     // while we have more to decode or while the decoder did output something on EOF
2224     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2225         int duration;
2226     handle_eof:
2227
2228         ist->pts = ist->next_pts;
2229         ist->dts = ist->next_dts;
2230
2231         if (avpkt.size && avpkt.size != pkt->size &&
2232             !(ist->dec->capabilities & CODEC_CAP_SUBFRAMES)) {
2233             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2234                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2235             ist->showed_multi_packet_warning = 1;
2236         }
2237
2238         switch (ist->dec_ctx->codec_type) {
2239         case AVMEDIA_TYPE_AUDIO:
2240             ret = decode_audio    (ist, &avpkt, &got_output);
2241             break;
2242         case AVMEDIA_TYPE_VIDEO:
2243             ret = decode_video    (ist, &avpkt, &got_output);
2244             if (avpkt.duration) {
2245                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2246             } else if(ist->dec_ctx->framerate.num != 0 && ist->dec_ctx->framerate.den != 0) {
2247                 int ticks= av_stream_get_parser(ist->st) ? av_stream_get_parser(ist->st)->repeat_pict+1 : ist->dec_ctx->ticks_per_frame;
2248                 duration = ((int64_t)AV_TIME_BASE *
2249                                 ist->dec_ctx->framerate.den * ticks) /
2250                                 ist->dec_ctx->framerate.num / ist->dec_ctx->ticks_per_frame;
2251             } else
2252                 duration = 0;
2253
2254             if(ist->dts != AV_NOPTS_VALUE && duration) {
2255                 ist->next_dts += duration;
2256             }else
2257                 ist->next_dts = AV_NOPTS_VALUE;
2258
2259             if (got_output)
2260                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
2261             break;
2262         case AVMEDIA_TYPE_SUBTITLE:
2263             ret = transcode_subtitles(ist, &avpkt, &got_output);
2264             break;
2265         default:
2266             return -1;
2267         }
2268
2269         if (ret < 0)
2270             return ret;
2271
2272         avpkt.dts=
2273         avpkt.pts= AV_NOPTS_VALUE;
2274
2275         // touch data and size only if not EOF
2276         if (pkt) {
2277             if(ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO)
2278                 ret = avpkt.size;
2279             avpkt.data += ret;
2280             avpkt.size -= ret;
2281         }
2282         if (!got_output) {
2283             continue;
2284         }
2285         if (got_output && !pkt)
2286             break;
2287     }
2288
2289     /* handle stream copy */
2290     if (!ist->decoding_needed) {
2291         ist->dts = ist->next_dts;
2292         switch (ist->dec_ctx->codec_type) {
2293         case AVMEDIA_TYPE_AUDIO:
2294             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->dec_ctx->frame_size) /
2295                              ist->dec_ctx->sample_rate;
2296             break;
2297         case AVMEDIA_TYPE_VIDEO:
2298             if (ist->framerate.num) {
2299                 // TODO: Remove work-around for c99-to-c89 issue 7
2300                 AVRational time_base_q = AV_TIME_BASE_Q;
2301                 int64_t next_dts = av_rescale_q(ist->next_dts, time_base_q, av_inv_q(ist->framerate));
2302                 ist->next_dts = av_rescale_q(next_dts + 1, av_inv_q(ist->framerate), time_base_q);
2303             } else if (pkt->duration) {
2304                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2305             } else if(ist->dec_ctx->framerate.num != 0) {
2306                 int ticks= av_stream_get_parser(ist->st) ? av_stream_get_parser(ist->st)->repeat_pict + 1 : ist->dec_ctx->ticks_per_frame;
2307                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2308                                   ist->dec_ctx->framerate.den * ticks) /
2309                                   ist->dec_ctx->framerate.num / ist->dec_ctx->ticks_per_frame;
2310             }
2311             break;
2312         }
2313         ist->pts = ist->dts;
2314         ist->next_pts = ist->next_dts;
2315     }
2316     for (i = 0; pkt && i < nb_output_streams; i++) {
2317         OutputStream *ost = output_streams[i];
2318
2319         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2320             continue;
2321
2322         do_streamcopy(ist, ost, pkt);
2323     }
2324
2325     return got_output;
2326 }
2327
2328 static void print_sdp(void)
2329 {
2330     char sdp[16384];
2331     int i;
2332     int j;
2333     AVIOContext *sdp_pb;
2334     AVFormatContext **avc = av_malloc_array(nb_output_files, sizeof(*avc));
2335
2336     if (!avc)
2337         exit_program(1);
2338     for (i = 0, j = 0; i < nb_output_files; i++) {
2339         if (!strcmp(output_files[i]->ctx->oformat->name, "rtp")) {
2340             avc[j] = output_files[i]->ctx;
2341             j++;
2342         }
2343     }
2344
2345     av_sdp_create(avc, j, sdp, sizeof(sdp));
2346
2347     if (!sdp_filename) {
2348         printf("SDP:\n%s\n", sdp);
2349         fflush(stdout);
2350     } else {
2351         if (avio_open2(&sdp_pb, sdp_filename, AVIO_FLAG_WRITE, &int_cb, NULL) < 0) {
2352             av_log(NULL, AV_LOG_ERROR, "Failed to open sdp file '%s'\n", sdp_filename);
2353         } else {
2354             avio_printf(sdp_pb, "SDP:\n%s", sdp);
2355             avio_closep(&sdp_pb);
2356             av_freep(&sdp_filename);
2357         }
2358     }
2359
2360     av_freep(&avc);
2361 }
2362
2363 static const HWAccel *get_hwaccel(enum AVPixelFormat pix_fmt)
2364 {
2365     int i;
2366     for (i = 0; hwaccels[i].name; i++)
2367         if (hwaccels[i].pix_fmt == pix_fmt)
2368             return &hwaccels[i];
2369     return NULL;
2370 }
2371
2372 static enum AVPixelFormat get_format(AVCodecContext *s, const enum AVPixelFormat *pix_fmts)
2373 {
2374     InputStream *ist = s->opaque;
2375     const enum AVPixelFormat *p;
2376     int ret;
2377
2378     for (p = pix_fmts; *p != -1; p++) {
2379         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(*p);
2380         const HWAccel *hwaccel;
2381
2382         if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
2383             break;
2384
2385         hwaccel = get_hwaccel(*p);
2386         if (!hwaccel ||
2387             (ist->active_hwaccel_id && ist->active_hwaccel_id != hwaccel->id) ||
2388             (ist->hwaccel_id != HWACCEL_AUTO && ist->hwaccel_id != hwaccel->id))
2389             continue;
2390
2391         ret = hwaccel->init(s);
2392         if (ret < 0) {
2393             if (ist->hwaccel_id == hwaccel->id) {
2394                 av_log(NULL, AV_LOG_FATAL,
2395                        "%s hwaccel requested for input stream #%d:%d, "
2396                        "but cannot be initialized.\n", hwaccel->name,
2397                        ist->file_index, ist->st->index);
2398                 return AV_PIX_FMT_NONE;
2399             }
2400             continue;
2401         }
2402         ist->active_hwaccel_id = hwaccel->id;
2403         ist->hwaccel_pix_fmt   = *p;
2404         break;
2405     }
2406
2407     return *p;
2408 }
2409
2410 static int get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
2411 {
2412     InputStream *ist = s->opaque;
2413
2414     if (ist->hwaccel_get_buffer && frame->format == ist->hwaccel_pix_fmt)
2415         return ist->hwaccel_get_buffer(s, frame, flags);
2416
2417     return avcodec_default_get_buffer2(s, frame, flags);
2418 }
2419
2420 static int init_input_stream(int ist_index, char *error, int error_len)
2421 {
2422     int ret;
2423     InputStream *ist = input_streams[ist_index];
2424
2425     if (ist->decoding_needed) {
2426         AVCodec *codec = ist->dec;
2427         if (!codec) {
2428             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2429                     avcodec_get_name(ist->dec_ctx->codec_id), ist->file_index, ist->st->index);
2430             return AVERROR(EINVAL);
2431         }
2432
2433         ist->dec_ctx->opaque                = ist;
2434         ist->dec_ctx->get_format            = get_format;
2435         ist->dec_ctx->get_buffer2           = get_buffer;
2436         ist->dec_ctx->thread_safe_callbacks = 1;
2437
2438         av_opt_set_int(ist->dec_ctx, "refcounted_frames", 1, 0);
2439         if (ist->dec_ctx->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
2440            (ist->decoding_needed & DECODING_FOR_OST)) {
2441             av_dict_set(&ist->decoder_opts, "compute_edt", "1", AV_DICT_DONT_OVERWRITE);
2442             if (ist->decoding_needed & DECODING_FOR_FILTER)
2443                 av_log(NULL, AV_LOG_WARNING, "Warning using DVB subtitles for filtering and output at the same time is not fully supported, also see -compute_edt [0|1]\n");
2444         }
2445
2446         if (!av_dict_get(ist->decoder_opts, "threads", NULL, 0))
2447             av_dict_set(&ist->decoder_opts, "threads", "auto", 0);
2448         if ((ret = avcodec_open2(ist->dec_ctx, codec, &ist->decoder_opts)) < 0) {
2449             if (ret == AVERROR_EXPERIMENTAL)
2450                 abort_codec_experimental(codec, 0);
2451
2452             snprintf(error, error_len,
2453                      "Error while opening decoder for input stream "
2454                      "#%d:%d : %s",
2455                      ist->file_index, ist->st->index, av_err2str(ret));
2456             return ret;
2457         }
2458         assert_avoptions(ist->decoder_opts);
2459     }
2460
2461     ist->next_pts = AV_NOPTS_VALUE;
2462     ist->next_dts = AV_NOPTS_VALUE;
2463
2464     return 0;
2465 }
2466
2467 static InputStream *get_input_stream(OutputStream *ost)
2468 {
2469     if (ost->source_index >= 0)
2470         return input_streams[ost->source_index];
2471     return NULL;
2472 }
2473
2474 static int compare_int64(const void *a, const void *b)
2475 {
2476     int64_t va = *(int64_t *)a, vb = *(int64_t *)b;
2477     return va < vb ? -1 : va > vb ? +1 : 0;
2478 }
2479
2480 static void parse_forced_key_frames(char *kf, OutputStream *ost,
2481                                     AVCodecContext *avctx)
2482 {
2483     char *p;
2484     int n = 1, i, size, index = 0;
2485     int64_t t, *pts;
2486
2487     for (p = kf; *p; p++)
2488         if (*p == ',')
2489             n++;
2490     size = n;
2491     pts = av_malloc_array(size, sizeof(*pts));
2492     if (!pts) {
2493         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
2494         exit_program(1);
2495     }
2496
2497     p = kf;
2498     for (i = 0; i < n; i++) {
2499         char *next = strchr(p, ',');
2500
2501         if (next)
2502             *next++ = 0;
2503
2504         if (!memcmp(p, "chapters", 8)) {
2505
2506             AVFormatContext *avf = output_files[ost->file_index]->ctx;
2507             int j;
2508
2509             if (avf->nb_chapters > INT_MAX - size ||
2510                 !(pts = av_realloc_f(pts, size += avf->nb_chapters - 1,
2511                                      sizeof(*pts)))) {
2512                 av_log(NULL, AV_LOG_FATAL,
2513                        "Could not allocate forced key frames array.\n");
2514                 exit_program(1);
2515             }
2516             t = p[8] ? parse_time_or_die("force_key_frames", p + 8, 1) : 0;
2517             t = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2518
2519             for (j = 0; j < avf->nb_chapters; j++) {
2520                 AVChapter *c = avf->chapters[j];
2521                 av_assert1(index < size);
2522                 pts[index++] = av_rescale_q(c->start, c->time_base,
2523                                             avctx->time_base) + t;
2524             }
2525
2526         } else {
2527
2528             t = parse_time_or_die("force_key_frames", p, 1);
2529             av_assert1(index < size);
2530             pts[index++] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2531
2532         }
2533
2534         p = next;
2535     }
2536
2537     av_assert0(index == size);
2538     qsort(pts, size, sizeof(*pts), compare_int64);
2539     ost->forced_kf_count = size;
2540     ost->forced_kf_pts   = pts;
2541 }
2542
2543 static void report_new_stream(int input_index, AVPacket *pkt)
2544 {
2545     InputFile *file = input_files[input_index];
2546     AVStream *st = file->ctx->streams[pkt->stream_index];
2547
2548     if (pkt->stream_index < file->nb_streams_warn)
2549         return;
2550     av_log(file->ctx, AV_LOG_WARNING,
2551            "New %s stream %d:%d at pos:%"PRId64" and DTS:%ss\n",
2552            av_get_media_type_string(st->codec->codec_type),
2553            input_index, pkt->stream_index,
2554            pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
2555     file->nb_streams_warn = pkt->stream_index + 1;
2556 }
2557
2558 static void set_encoder_id(OutputFile *of, OutputStream *ost)
2559 {
2560     AVDictionaryEntry *e;
2561
2562     uint8_t *encoder_string;
2563     int encoder_string_len;
2564     int format_flags = 0;
2565     int codec_flags = 0;
2566
2567     if (av_dict_get(ost->st->metadata, "encoder",  NULL, 0))
2568         return;
2569
2570     e = av_dict_get(of->opts, "fflags", NULL, 0);
2571     if (e) {
2572         const AVOption *o = av_opt_find(of->ctx, "fflags", NULL, 0, 0);
2573         if (!o)
2574             return;
2575         av_opt_eval_flags(of->ctx, o, e->value, &format_flags);
2576     }
2577     e = av_dict_get(ost->encoder_opts, "flags", NULL, 0);
2578     if (e) {
2579         const AVOption *o = av_opt_find(ost->enc_ctx, "flags", NULL, 0, 0);
2580         if (!o)
2581             return;
2582         av_opt_eval_flags(ost->enc_ctx, o, e->value, &codec_flags);
2583     }
2584
2585     encoder_string_len = sizeof(LIBAVCODEC_IDENT) + strlen(ost->enc->name) + 2;
2586     encoder_string     = av_mallocz(encoder_string_len);
2587     if (!encoder_string)
2588         exit_program(1);
2589
2590     if (!(format_flags & AVFMT_FLAG_BITEXACT) && !(codec_flags & CODEC_FLAG_BITEXACT))
2591         av_strlcpy(encoder_string, LIBAVCODEC_IDENT " ", encoder_string_len);
2592     else
2593         av_strlcpy(encoder_string, "Lavc ", encoder_string_len);
2594     av_strlcat(encoder_string, ost->enc->name, encoder_string_len);
2595     av_dict_set(&ost->st->metadata, "encoder",  encoder_string,
2596                 AV_DICT_DONT_STRDUP_VAL | AV_DICT_DONT_OVERWRITE);
2597 }
2598
2599 static int transcode_init(void)
2600 {
2601     int ret = 0, i, j, k;
2602     AVFormatContext *oc;
2603     OutputStream *ost;
2604     InputStream *ist;
2605     char error[1024] = {0};
2606     int want_sdp = 1;
2607
2608     for (i = 0; i < nb_filtergraphs; i++) {
2609         FilterGraph *fg = filtergraphs[i];
2610         for (j = 0; j < fg->nb_outputs; j++) {
2611             OutputFilter *ofilter = fg->outputs[j];
2612             if (!ofilter->ost || ofilter->ost->source_index >= 0)
2613                 continue;
2614             if (fg->nb_inputs != 1)
2615                 continue;
2616             for (k = nb_input_streams-1; k >= 0 ; k--)
2617                 if (fg->inputs[0]->ist == input_streams[k])
2618                     break;
2619             ofilter->ost->source_index = k;
2620         }
2621     }
2622
2623     /* init framerate emulation */
2624     for (i = 0; i < nb_input_files; i++) {
2625         InputFile *ifile = input_files[i];
2626         if (ifile->rate_emu)
2627             for (j = 0; j < ifile->nb_streams; j++)
2628                 input_streams[j + ifile->ist_index]->start = av_gettime_relative();
2629     }
2630
2631     /* output stream init */
2632     for (i = 0; i < nb_output_files; i++) {
2633         oc = output_files[i]->ctx;
2634         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2635             av_dump_format(oc, i, oc->filename, 1);
2636             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2637             return AVERROR(EINVAL);
2638         }
2639     }
2640
2641     /* init complex filtergraphs */
2642     for (i = 0; i < nb_filtergraphs; i++)
2643         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2644             return ret;
2645
2646     /* for each output stream, we compute the right encoding parameters */
2647     for (i = 0; i < nb_output_streams; i++) {
2648         AVCodecContext *enc_ctx;
2649         AVCodecContext *dec_ctx = NULL;
2650         ost = output_streams[i];
2651         oc  = output_files[ost->file_index]->ctx;
2652         ist = get_input_stream(ost);
2653
2654         if (ost->attachment_filename)
2655             continue;
2656
2657         enc_ctx = ost->stream_copy ? ost->st->codec : ost->enc_ctx;
2658
2659         if (ist) {
2660             dec_ctx = ist->dec_ctx;
2661
2662             ost->st->disposition          = ist->st->disposition;
2663             enc_ctx->bits_per_raw_sample    = dec_ctx->bits_per_raw_sample;
2664             enc_ctx->chroma_sample_location = dec_ctx->chroma_sample_location;
2665         } else {
2666             for (j=0; j<oc->nb_streams; j++) {
2667                 AVStream *st = oc->streams[j];
2668                 if (st != ost->st && st->codec->codec_type == enc_ctx->codec_type)
2669                     break;
2670             }
2671             if (j == oc->nb_streams)
2672                 if (enc_ctx->codec_type == AVMEDIA_TYPE_AUDIO || enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO)
2673                     ost->st->disposition = AV_DISPOSITION_DEFAULT;
2674         }
2675
2676         if (ost->stream_copy) {
2677             AVRational sar;
2678             uint64_t extra_size;
2679
2680             av_assert0(ist && !ost->filter);
2681
2682             extra_size = (uint64_t)dec_ctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2683
2684             if (extra_size > INT_MAX) {
2685                 return AVERROR(EINVAL);
2686             }
2687
2688             /* if stream_copy is selected, no need to decode or encode */
2689             enc_ctx->codec_id   = dec_ctx->codec_id;
2690             enc_ctx->codec_type = dec_ctx->codec_type;
2691
2692             if (!enc_ctx->codec_tag) {
2693                 unsigned int codec_tag;
2694                 if (!oc->oformat->codec_tag ||
2695                      av_codec_get_id (oc->oformat->codec_tag, dec_ctx->codec_tag) == enc_ctx->codec_id ||
2696                      !av_codec_get_tag2(oc->oformat->codec_tag, dec_ctx->codec_id, &codec_tag))
2697                     enc_ctx->codec_tag = dec_ctx->codec_tag;
2698             }
2699
2700             enc_ctx->bit_rate       = dec_ctx->bit_rate;
2701             enc_ctx->rc_max_rate    = dec_ctx->rc_max_rate;
2702             enc_ctx->rc_buffer_size = dec_ctx->rc_buffer_size;
2703             enc_ctx->field_order    = dec_ctx->field_order;
2704             if (dec_ctx->extradata_size) {
2705                 enc_ctx->extradata      = av_mallocz(extra_size);
2706                 if (!enc_ctx->extradata) {
2707                     return AVERROR(ENOMEM);
2708                 }
2709                 memcpy(enc_ctx->extradata, dec_ctx->extradata, dec_ctx->extradata_size);
2710             }
2711             enc_ctx->extradata_size= dec_ctx->extradata_size;
2712             enc_ctx->bits_per_coded_sample  = dec_ctx->bits_per_coded_sample;
2713
2714             enc_ctx->time_base = ist->st->time_base;
2715             /*
2716              * Avi is a special case here because it supports variable fps but
2717              * having the fps and timebase differe significantly adds quite some
2718              * overhead
2719              */
2720             if(!strcmp(oc->oformat->name, "avi")) {
2721                 if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
2722                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
2723                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(dec_ctx->time_base)
2724                                && av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(dec_ctx->time_base) < 1.0/500
2725                      || copy_tb==2){
2726                     enc_ctx->time_base.num = ist->st->r_frame_rate.den;
2727                     enc_ctx->time_base.den = 2*ist->st->r_frame_rate.num;
2728                     enc_ctx->ticks_per_frame = 2;
2729                 } else if (   copy_tb<0 && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2730                                  && av_q2d(ist->st->time_base) < 1.0/500
2731                     || copy_tb==0){
2732                     enc_ctx->time_base = dec_ctx->time_base;
2733                     enc_ctx->time_base.num *= dec_ctx->ticks_per_frame;
2734                     enc_ctx->time_base.den *= 2;
2735                     enc_ctx->ticks_per_frame = 2;
2736                 }
2737             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2738                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2739                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2740                       && strcmp(oc->oformat->name, "f4v")
2741             ) {
2742                 if(   copy_tb<0 && dec_ctx->time_base.den
2743                                 && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > av_q2d(ist->st->time_base)
2744                                 && av_q2d(ist->st->time_base) < 1.0/500
2745                    || copy_tb==0){
2746                     enc_ctx->time_base = dec_ctx->time_base;
2747                     enc_ctx->time_base.num *= dec_ctx->ticks_per_frame;
2748                 }
2749             }
2750             if (   enc_ctx->codec_tag == AV_RL32("tmcd")
2751                 && dec_ctx->time_base.num < dec_ctx->time_base.den
2752                 && dec_ctx->time_base.num > 0
2753                 && 121LL*dec_ctx->time_base.num > dec_ctx->time_base.den) {
2754                 enc_ctx->time_base = dec_ctx->time_base;
2755             }
2756
2757             if (ist && !ost->frame_rate.num)
2758                 ost->frame_rate = ist->framerate;
2759             if(ost->frame_rate.num)
2760                 enc_ctx->time_base = av_inv_q(ost->frame_rate);
2761
2762             av_reduce(&enc_ctx->time_base.num, &enc_ctx->time_base.den,
2763                         enc_ctx->time_base.num, enc_ctx->time_base.den, INT_MAX);
2764
2765             if (ist->st->nb_side_data) {
2766                 ost->st->side_data = av_realloc_array(NULL, ist->st->nb_side_data,
2767                                                       sizeof(*ist->st->side_data));
2768                 if (!ost->st->side_data)
2769                     return AVERROR(ENOMEM);
2770
2771                 ost->st->nb_side_data = 0;
2772                 for (j = 0; j < ist->st->nb_side_data; j++) {
2773                     const AVPacketSideData *sd_src = &ist->st->side_data[j];
2774                     AVPacketSideData *sd_dst = &ost->st->side_data[ost->st->nb_side_data];
2775
2776                     if (ost->rotate_overridden && sd_src->type == AV_PKT_DATA_DISPLAYMATRIX)
2777                         continue;
2778
2779                     sd_dst->data = av_malloc(sd_src->size);
2780                     if (!sd_dst->data)
2781                         return AVERROR(ENOMEM);
2782                     memcpy(sd_dst->data, sd_src->data, sd_src->size);
2783                     sd_dst->size = sd_src->size;
2784                     sd_dst->type = sd_src->type;
2785                     ost->st->nb_side_data++;
2786                 }
2787             }
2788
2789             ost->parser = av_parser_init(enc_ctx->codec_id);
2790
2791             switch (enc_ctx->codec_type) {
2792             case AVMEDIA_TYPE_AUDIO:
2793                 if (audio_volume != 256) {
2794                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2795                     exit_program(1);
2796                 }
2797                 enc_ctx->channel_layout     = dec_ctx->channel_layout;
2798                 enc_ctx->sample_rate        = dec_ctx->sample_rate;
2799                 enc_ctx->channels           = dec_ctx->channels;
2800                 enc_ctx->frame_size         = dec_ctx->frame_size;
2801                 enc_ctx->audio_service_type = dec_ctx->audio_service_type;
2802                 enc_ctx->block_align        = dec_ctx->block_align;
2803                 enc_ctx->initial_padding    = dec_ctx->delay;
2804 #if FF_API_AUDIOENC_DELAY
2805                 enc_ctx->delay              = dec_ctx->delay;
2806 #endif
2807                 if((enc_ctx->block_align == 1 || enc_ctx->block_align == 1152 || enc_ctx->block_align == 576) && enc_ctx->codec_id == AV_CODEC_ID_MP3)
2808                     enc_ctx->block_align= 0;
2809                 if(enc_ctx->codec_id == AV_CODEC_ID_AC3)
2810                     enc_ctx->block_align= 0;
2811                 break;
2812             case AVMEDIA_TYPE_VIDEO:
2813                 enc_ctx->pix_fmt            = dec_ctx->pix_fmt;
2814                 enc_ctx->width              = dec_ctx->width;
2815                 enc_ctx->height             = dec_ctx->height;
2816                 enc_ctx->has_b_frames       = dec_ctx->has_b_frames;
2817                 if (ost->frame_aspect_ratio.num) { // overridden by the -aspect cli option
2818                     sar =
2819                         av_mul_q(ost->frame_aspect_ratio,
2820                                  (AVRational){ enc_ctx->height, enc_ctx->width });
2821                     av_log(NULL, AV_LOG_WARNING, "Overriding aspect ratio "
2822                            "with stream copy may produce invalid files\n");
2823                 }
2824                 else if (ist->st->sample_aspect_ratio.num)
2825                     sar = ist->st->sample_aspect_ratio;
2826                 else
2827                     sar = dec_ctx->sample_aspect_ratio;
2828                 ost->st->sample_aspect_ratio = enc_ctx->sample_aspect_ratio = sar;
2829                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2830                 ost->st->r_frame_rate = ist->st->r_frame_rate;
2831                 break;
2832             case AVMEDIA_TYPE_SUBTITLE:
2833                 enc_ctx->width  = dec_ctx->width;
2834                 enc_ctx->height = dec_ctx->height;
2835                 break;
2836             case AVMEDIA_TYPE_UNKNOWN:
2837             case AVMEDIA_TYPE_DATA:
2838             case AVMEDIA_TYPE_ATTACHMENT:
2839                 break;
2840             default:
2841                 abort();
2842             }
2843         } else {
2844             if (!ost->enc)
2845                 ost->enc = avcodec_find_encoder(enc_ctx->codec_id);
2846             if (!ost->enc) {
2847                 /* should only happen when a default codec is not present. */
2848                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
2849                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
2850                 ret = AVERROR(EINVAL);
2851                 goto dump_format;
2852             }
2853
2854             if (ist)
2855                 ist->decoding_needed |= DECODING_FOR_OST;
2856             ost->encoding_needed = 1;
2857
2858             set_encoder_id(output_files[ost->file_index], ost);
2859
2860             if (!ost->filter &&
2861                 (enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO ||
2862                  enc_ctx->codec_type == AVMEDIA_TYPE_AUDIO)) {
2863                     FilterGraph *fg;
2864                     fg = init_simple_filtergraph(ist, ost);
2865                     if (configure_filtergraph(fg)) {
2866                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2867                         exit_program(1);
2868                     }
2869             }
2870
2871             if (enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
2872                 if (!ost->frame_rate.num)
2873                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
2874                 if (ist && !ost->frame_rate.num)
2875                     ost->frame_rate = ist->framerate;
2876                 if (ist && !ost->frame_rate.num)
2877                     ost->frame_rate = ist->st->r_frame_rate;
2878                 if (ist && !ost->frame_rate.num) {
2879                     ost->frame_rate = (AVRational){25, 1};
2880                     av_log(NULL, AV_LOG_WARNING,
2881                            "No information "
2882                            "about the input framerate is available. Falling "
2883                            "back to a default value of 25fps for output stream #%d:%d. Use the -r option "
2884                            "if you want a different framerate.\n",
2885                            ost->file_index, ost->index);
2886                 }
2887 //                    ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
2888                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2889                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2890                     ost->frame_rate = ost->enc->supported_framerates[idx];
2891                 }
2892                 // reduce frame rate for mpeg4 to be within the spec limits
2893                 if (enc_ctx->codec_id == AV_CODEC_ID_MPEG4) {
2894                     av_reduce(&ost->frame_rate.num, &ost->frame_rate.den,
2895                               ost->frame_rate.num, ost->frame_rate.den, 65535);
2896                 }
2897             }
2898
2899             switch (enc_ctx->codec_type) {
2900             case AVMEDIA_TYPE_AUDIO:
2901                 enc_ctx->sample_fmt     = ost->filter->filter->inputs[0]->format;
2902                 enc_ctx->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2903                 enc_ctx->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2904                 enc_ctx->channels       = avfilter_link_get_channels(ost->filter->filter->inputs[0]);
2905                 enc_ctx->time_base      = (AVRational){ 1, enc_ctx->sample_rate };
2906                 break;
2907             case AVMEDIA_TYPE_VIDEO:
2908                 enc_ctx->time_base = av_inv_q(ost->frame_rate);
2909                 if (!(enc_ctx->time_base.num && enc_ctx->time_base.den))
2910                     enc_ctx->time_base = ost->filter->filter->inputs[0]->time_base;
2911                 if (   av_q2d(enc_ctx->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
2912                    && (video_sync_method == VSYNC_CFR || video_sync_method == VSYNC_VSCFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
2913                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
2914                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
2915                 }
2916                 for (j = 0; j < ost->forced_kf_count; j++)
2917                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
2918                                                          AV_TIME_BASE_Q,
2919                                                          enc_ctx->time_base);
2920
2921                 enc_ctx->width  = ost->filter->filter->inputs[0]->w;
2922                 enc_ctx->height = ost->filter->filter->inputs[0]->h;
2923                 enc_ctx->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2924                     ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option
2925                     av_mul_q(ost->frame_aspect_ratio, (AVRational){ enc_ctx->height, enc_ctx->width }) :
2926                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2927                 if (!strncmp(ost->enc->name, "libx264", 7) &&
2928                     enc_ctx->pix_fmt == AV_PIX_FMT_NONE &&
2929                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2930                     av_log(NULL, AV_LOG_WARNING,
2931                            "No pixel format specified, %s for H.264 encoding chosen.\n"
2932                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2933                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2934                 if (!strncmp(ost->enc->name, "mpeg2video", 10) &&
2935                     enc_ctx->pix_fmt == AV_PIX_FMT_NONE &&
2936                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2937                     av_log(NULL, AV_LOG_WARNING,
2938                            "No pixel format specified, %s for MPEG-2 encoding chosen.\n"
2939                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2940                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2941                 enc_ctx->pix_fmt = ost->filter->filter->inputs[0]->format;
2942
2943                 ost->st->avg_frame_rate = ost->frame_rate;
2944
2945                 if (!dec_ctx ||
2946                     enc_ctx->width   != dec_ctx->width  ||
2947                     enc_ctx->height  != dec_ctx->height ||
2948                     enc_ctx->pix_fmt != dec_ctx->pix_fmt) {
2949                     enc_ctx->bits_per_raw_sample = frame_bits_per_raw_sample;
2950                 }
2951
2952                 if (ost->forced_keyframes) {
2953                     if (!strncmp(ost->forced_keyframes, "expr:", 5)) {
2954                         ret = av_expr_parse(&ost->forced_keyframes_pexpr, ost->forced_keyframes+5,
2955                                             forced_keyframes_const_names, NULL, NULL, NULL, NULL, 0, NULL);
2956                         if (ret < 0) {
2957                             av_log(NULL, AV_LOG_ERROR,
2958                                    "Invalid force_key_frames expression '%s'\n", ost->forced_keyframes+5);
2959                             return ret;
2960                         }
2961                         ost->forced_keyframes_expr_const_values[FKF_N] = 0;
2962                         ost->forced_keyframes_expr_const_values[FKF_N_FORCED] = 0;
2963                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] = NAN;
2964                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] = NAN;
2965
2966                         // Don't parse the 'forced_keyframes' in case of 'keep-source-keyframes',
2967                         // parse it only for static kf timings
2968                     } else if(strncmp(ost->forced_keyframes, "source", 6)) {
2969                         parse_forced_key_frames(ost->forced_keyframes, ost, ost->enc_ctx);
2970                     }
2971                 }
2972                 break;
2973             case AVMEDIA_TYPE_SUBTITLE:
2974                 enc_ctx->time_base = (AVRational){1, 1000};
2975                 if (!enc_ctx->width) {
2976                     enc_ctx->width     = input_streams[ost->source_index]->st->codec->width;
2977                     enc_ctx->height    = input_streams[ost->source_index]->st->codec->height;
2978                 }
2979                 break;
2980             case AVMEDIA_TYPE_DATA:
2981                 break;
2982             default:
2983                 abort();
2984                 break;
2985             }
2986             /* two pass mode */
2987             if (enc_ctx->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
2988                 char logfilename[1024];
2989                 FILE *f;
2990
2991                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2992                          ost->logfile_prefix ? ost->logfile_prefix :
2993                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
2994                          i);
2995                 if (!strcmp(ost->enc->name, "libx264")) {
2996                     av_dict_set(&ost->encoder_opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2997                 } else {
2998                     if (enc_ctx->flags & CODEC_FLAG_PASS2) {
2999                         char  *logbuffer;
3000                         size_t logbuffer_size;
3001                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
3002                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
3003                                    logfilename);
3004                             exit_program(1);
3005                         }
3006                         enc_ctx->stats_in = logbuffer;
3007                     }
3008                     if (enc_ctx->flags & CODEC_FLAG_PASS1) {
3009                         f = av_fopen_utf8(logfilename, "wb");
3010                         if (!f) {
3011                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
3012                                 logfilename, strerror(errno));
3013                             exit_program(1);
3014                         }
3015                         ost->logfile = f;
3016                     }
3017                 }
3018             }
3019         }
3020
3021         if (ost->disposition) {
3022             static const AVOption opts[] = {
3023                 { "disposition"         , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
3024                 { "default"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DEFAULT           },    .unit = "flags" },
3025                 { "dub"                 , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DUB               },    .unit = "flags" },
3026                 { "original"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_ORIGINAL          },    .unit = "flags" },
3027                 { "comment"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_COMMENT           },    .unit = "flags" },
3028                 { "lyrics"              , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_LYRICS            },    .unit = "flags" },
3029                 { "karaoke"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_KARAOKE           },    .unit = "flags" },
3030                 { "forced"              , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_FORCED            },    .unit = "flags" },
3031                 { "hearing_impaired"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_HEARING_IMPAIRED  },    .unit = "flags" },
3032                 { "visual_impaired"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_VISUAL_IMPAIRED   },    .unit = "flags" },
3033                 { "clean_effects"       , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CLEAN_EFFECTS     },    .unit = "flags" },
3034                 { "captions"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CAPTIONS          },    .unit = "flags" },
3035                 { "descriptions"        , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DESCRIPTIONS      },    .unit = "flags" },
3036                 { "metadata"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_METADATA          },    .unit = "flags" },
3037                 { NULL },
3038             };
3039             static const AVClass class = {
3040                 .class_name = "",
3041                 .item_name  = av_default_item_name,
3042                 .option     = opts,
3043                 .version    = LIBAVUTIL_VERSION_INT,
3044             };
3045             const AVClass *pclass = &class;
3046
3047             ret = av_opt_eval_flags(&pclass, &opts[0], ost->disposition, &ost->st->disposition);
3048             if (ret < 0)
3049                 goto dump_format;
3050         }
3051     }
3052
3053     /* open each encoder */
3054     for (i = 0; i < nb_output_streams; i++) {
3055         ost = output_streams[i];
3056         if (ost->encoding_needed) {
3057             AVCodec      *codec = ost->enc;
3058             AVCodecContext *dec = NULL;
3059
3060             if ((ist = get_input_stream(ost)))
3061                 dec = ist->dec_ctx;
3062             if (dec && dec->subtitle_header) {
3063                 /* ASS code assumes this buffer is null terminated so add extra byte. */
3064                 ost->enc_ctx->subtitle_header = av_mallocz(dec->subtitle_header_size + 1);
3065                 if (!ost->enc_ctx->subtitle_header) {
3066                     ret = AVERROR(ENOMEM);
3067                     goto dump_format;
3068                 }
3069                 memcpy(ost->enc_ctx->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
3070                 ost->enc_ctx->subtitle_header_size = dec->subtitle_header_size;
3071             }
3072             if (!av_dict_get(ost->encoder_opts, "threads", NULL, 0))
3073                 av_dict_set(&ost->encoder_opts, "threads", "auto", 0);
3074             av_dict_set(&ost->encoder_opts, "side_data_only_packets", "1", 0);
3075
3076             if ((ret = avcodec_open2(ost->enc_ctx, codec, &ost->encoder_opts)) < 0) {
3077                 if (ret == AVERROR_EXPERIMENTAL)
3078                     abort_codec_experimental(codec, 1);
3079                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
3080                         ost->file_index, ost->index);
3081                 goto dump_format;
3082             }
3083             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
3084                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
3085                 av_buffersink_set_frame_size(ost->filter->filter,
3086                                              ost->enc_ctx->frame_size);
3087             assert_avoptions(ost->encoder_opts);
3088             if (ost->enc_ctx->bit_rate && ost->enc_ctx->bit_rate < 1000)
3089                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
3090                                              " It takes bits/s as argument, not kbits/s\n");
3091
3092             ret = avcodec_copy_context(ost->st->codec, ost->enc_ctx);
3093             if (ret < 0) {
3094                 av_log(NULL, AV_LOG_FATAL,
3095                        "Error initializing the output stream codec context.\n");
3096                 exit_program(1);
3097             }
3098
3099             // copy timebase while removing common factors
3100             ost->st->time_base = av_add_q(ost->enc_ctx->time_base, (AVRational){0, 1});
3101             ost->st->codec->codec= ost->enc_ctx->codec;
3102         } else {
3103             ret = av_opt_set_dict(ost->enc_ctx, &ost->encoder_opts);
3104             if (ret < 0) {
3105                 av_log(NULL, AV_LOG_FATAL,
3106                     "Error setting up codec context options.\n");
3107                 return ret;
3108             }
3109             // copy timebase while removing common factors
3110             ost->st->time_base = av_add_q(ost->st->codec->time_base, (AVRational){0, 1});
3111         }
3112     }
3113
3114     /* init input streams */
3115     for (i = 0; i < nb_input_streams; i++)
3116         if ((ret = init_input_stream(i, error, sizeof(error))) < 0) {
3117             for (i = 0; i < nb_output_streams; i++) {
3118                 ost = output_streams[i];
3119                 avcodec_close(ost->enc_ctx);
3120             }
3121             goto dump_format;
3122         }
3123
3124     /* discard unused programs */
3125     for (i = 0; i < nb_input_files; i++) {
3126         InputFile *ifile = input_files[i];
3127         for (j = 0; j < ifile->ctx->nb_programs; j++) {
3128             AVProgram *p = ifile->ctx->programs[j];
3129             int discard  = AVDISCARD_ALL;
3130
3131             for (k = 0; k < p->nb_stream_indexes; k++)
3132                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
3133                     discard = AVDISCARD_DEFAULT;
3134                     break;
3135                 }
3136             p->discard = discard;
3137         }
3138     }
3139
3140     /* open files and write file headers */
3141     for (i = 0; i < nb_output_files; i++) {
3142         oc = output_files[i]->ctx;
3143         oc->interrupt_callback = int_cb;
3144         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
3145             snprintf(error, sizeof(error),
3146                      "Could not write header for output file #%d "
3147                      "(incorrect codec parameters ?): %s",
3148                      i, av_err2str(ret));
3149             ret = AVERROR(EINVAL);
3150             goto dump_format;
3151         }
3152 //         assert_avoptions(output_files[i]->opts);
3153         if (strcmp(oc->oformat->name, "rtp")) {
3154             want_sdp = 0;
3155         }
3156     }
3157
3158  dump_format:
3159     /* dump the file output parameters - cannot be done before in case
3160        of stream copy */
3161     for (i = 0; i < nb_output_files; i++) {
3162         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
3163     }
3164
3165     /* dump the stream mapping */
3166     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
3167     for (i = 0; i < nb_input_streams; i++) {
3168         ist = input_streams[i];
3169
3170         for (j = 0; j < ist->nb_filters; j++) {
3171             if (ist->filters[j]->graph->graph_desc) {
3172                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
3173                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
3174                        ist->filters[j]->name);
3175                 if (nb_filtergraphs > 1)
3176                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
3177                 av_log(NULL, AV_LOG_INFO, "\n");
3178             }
3179         }
3180     }
3181
3182     for (i = 0; i < nb_output_streams; i++) {
3183         ost = output_streams[i];
3184
3185         if (ost->attachment_filename) {
3186             /* an attached file */
3187             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
3188                    ost->attachment_filename, ost->file_index, ost->index);
3189             continue;
3190         }
3191
3192         if (ost->filter && ost->filter->graph->graph_desc) {
3193             /* output from a complex graph */
3194             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
3195             if (nb_filtergraphs > 1)
3196                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
3197
3198             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
3199                    ost->index, ost->enc ? ost->enc->name : "?");
3200             continue;
3201         }
3202
3203         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
3204                input_streams[ost->source_index]->file_index,
3205                input_streams[ost->source_index]->st->index,
3206                ost->file_index,
3207                ost->index);
3208         if (ost->sync_ist != input_streams[ost->source_index])
3209             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
3210                    ost->sync_ist->file_index,
3211                    ost->sync_ist->st->index);
3212         if (ost->stream_copy)
3213             av_log(NULL, AV_LOG_INFO, " (copy)");
3214         else {
3215             const AVCodec *in_codec    = input_streams[ost->source_index]->dec;
3216             const AVCodec *out_codec   = ost->enc;
3217             const char *decoder_name   = "?";
3218             const char *in_codec_name  = "?";
3219             const char *encoder_name   = "?";
3220             const char *out_codec_name = "?";
3221             const AVCodecDescriptor *desc;
3222
3223             if (in_codec) {
3224                 decoder_name  = in_codec->name;
3225                 desc = avcodec_descriptor_get(in_codec->id);
3226                 if (desc)
3227                     in_codec_name = desc->name;
3228                 if (!strcmp(decoder_name, in_codec_name))
3229                     decoder_name = "native";
3230             }
3231
3232             if (out_codec) {
3233                 encoder_name   = out_codec->name;
3234                 desc = avcodec_descriptor_get(out_codec->id);
3235                 if (desc)
3236                     out_codec_name = desc->name;
3237                 if (!strcmp(encoder_name, out_codec_name))
3238                     encoder_name = "native";
3239             }
3240
3241             av_log(NULL, AV_LOG_INFO, " (%s (%s) -> %s (%s))",
3242                    in_codec_name, decoder_name,
3243                    out_codec_name, encoder_name);
3244         }
3245         av_log(NULL, AV_LOG_INFO, "\n");
3246     }
3247
3248     if (ret) {
3249         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
3250         return ret;
3251     }
3252
3253     if (sdp_filename || want_sdp) {
3254         print_sdp();
3255     }
3256
3257     transcode_init_done = 1;
3258
3259     return 0;
3260 }
3261
3262 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
3263 static int need_output(void)
3264 {
3265     int i;
3266
3267     for (i = 0; i < nb_output_streams; i++) {
3268         OutputStream *ost    = output_streams[i];
3269         OutputFile *of       = output_files[ost->file_index];
3270         AVFormatContext *os  = output_files[ost->file_index]->ctx;
3271
3272         if (ost->finished ||
3273             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3274             continue;
3275         if (ost->frame_number >= ost->max_frames) {
3276             int j;
3277             for (j = 0; j < of->ctx->nb_streams; j++)
3278                 close_output_stream(output_streams[of->ost_index + j]);
3279             continue;
3280         }
3281
3282         return 1;
3283     }
3284
3285     return 0;
3286 }
3287
3288 /**
3289  * Select the output stream to process.
3290  *
3291  * @return  selected output stream, or NULL if none available
3292  */
3293 static OutputStream *choose_output(void)
3294 {
3295     int i;
3296     int64_t opts_min = INT64_MAX;
3297     OutputStream *ost_min = NULL;
3298
3299     for (i = 0; i < nb_output_streams; i++) {
3300         OutputStream *ost = output_streams[i];
3301         int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
3302                                     AV_TIME_BASE_Q);
3303         if (!ost->finished && opts < opts_min) {
3304             opts_min = opts;
3305             ost_min  = ost->unavailable ? NULL : ost;
3306         }
3307     }
3308     return ost_min;
3309 }
3310
3311 static int check_keyboard_interaction(int64_t cur_time)
3312 {
3313     int i, ret, key;
3314     static int64_t last_time;
3315     if (received_nb_signals)
3316         return AVERROR_EXIT;
3317     /* read_key() returns 0 on EOF */
3318     if(cur_time - last_time >= 100000 && !run_as_daemon){
3319         key =  read_key();
3320         last_time = cur_time;
3321     }else
3322         key = -1;
3323     if (key == 'q')
3324         return AVERROR_EXIT;
3325     if (key == '+') av_log_set_level(av_log_get_level()+10);
3326     if (key == '-') av_log_set_level(av_log_get_level()-10);
3327     if (key == 's') qp_hist     ^= 1;
3328     if (key == 'h'){
3329         if (do_hex_dump){
3330             do_hex_dump = do_pkt_dump = 0;
3331         } else if(do_pkt_dump){
3332             do_hex_dump = 1;
3333         } else
3334             do_pkt_dump = 1;
3335         av_log_set_level(AV_LOG_DEBUG);
3336     }
3337     if (key == 'c' || key == 'C'){
3338         char buf[4096], target[64], command[256], arg[256] = {0};
3339         double time;
3340         int k, n = 0;
3341         fprintf(stderr, "\nEnter command: <target>|all <time>|-1 <command>[ <argument>]\n");
3342         i = 0;
3343         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3344             if (k > 0)
3345                 buf[i++] = k;
3346         buf[i] = 0;
3347         if (k > 0 &&
3348             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
3349             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
3350                    target, time, command, arg);
3351             for (i = 0; i < nb_filtergraphs; i++) {
3352                 FilterGraph *fg = filtergraphs[i];
3353                 if (fg->graph) {
3354                     if (time < 0) {
3355                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
3356                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
3357                         fprintf(stderr, "Command reply for stream %d: ret:%d res:\n%s", i, ret, buf);
3358                     } else if (key == 'c') {
3359                         fprintf(stderr, "Queing commands only on filters supporting the specific command is unsupported\n");
3360                         ret = AVERROR_PATCHWELCOME;
3361                     } else {
3362                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
3363                         if (ret < 0)
3364                             fprintf(stderr, "Queing command failed with error %s\n", av_err2str(ret));
3365                     }
3366                 }
3367             }
3368         } else {
3369             av_log(NULL, AV_LOG_ERROR,
3370                    "Parse error, at least 3 arguments were expected, "
3371                    "only %d given in string '%s'\n", n, buf);
3372         }
3373     }
3374     if (key == 'd' || key == 'D'){
3375         int debug=0;
3376         if(key == 'D') {
3377             debug = input_streams[0]->st->codec->debug<<1;
3378             if(!debug) debug = 1;
3379             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
3380                 debug += debug;
3381         }else
3382             if(scanf("%d", &debug)!=1)
3383                 fprintf(stderr,"error parsing debug value\n");
3384         for(i=0;i<nb_input_streams;i++) {
3385             input_streams[i]->st->codec->debug = debug;
3386         }
3387         for(i=0;i<nb_output_streams;i++) {
3388             OutputStream *ost = output_streams[i];
3389             ost->enc_ctx->debug = debug;
3390         }
3391         if(debug) av_log_set_level(AV_LOG_DEBUG);
3392         fprintf(stderr,"debug=%d\n", debug);
3393     }
3394     if (key == '?'){
3395         fprintf(stderr, "key    function\n"
3396                         "?      show this help\n"
3397                         "+      increase verbosity\n"
3398                         "-      decrease verbosity\n"
3399                         "c      Send command to first matching filter supporting it\n"
3400                         "C      Send/Que command to all matching filters\n"
3401                         "D      cycle through available debug modes\n"
3402                         "h      dump packets/hex press to cycle through the 3 states\n"
3403                         "q      quit\n"
3404                         "s      Show QP histogram\n"
3405         );
3406     }
3407     return 0;
3408 }
3409
3410 #if HAVE_PTHREADS
3411 static void *input_thread(void *arg)
3412 {
3413     InputFile *f = arg;
3414     unsigned flags = f->non_blocking ? AV_THREAD_MESSAGE_NONBLOCK : 0;
3415     int ret = 0;
3416
3417     while (1) {
3418         AVPacket pkt;
3419         ret = av_read_frame(f->ctx, &pkt);
3420
3421         if (ret == AVERROR(EAGAIN)) {
3422             av_usleep(10000);
3423             continue;
3424         }
3425         if (ret < 0) {
3426             av_thread_message_queue_set_err_recv(f->in_thread_queue, ret);
3427             break;
3428         }
3429         av_dup_packet(&pkt);
3430         ret = av_thread_message_queue_send(f->in_thread_queue, &pkt, flags);
3431         if (flags && ret == AVERROR(EAGAIN)) {
3432             flags = 0;
3433             ret = av_thread_message_queue_send(f->in_thread_queue, &pkt, flags);
3434             av_log(f->ctx, AV_LOG_WARNING,
3435                    "Thread message queue blocking; consider raising the "
3436                    "thread_queue_size option (current value: %d)\n",
3437                    f->thread_queue_size);
3438         }
3439         if (ret < 0) {
3440             if (ret != AVERROR_EOF)
3441                 av_log(f->ctx, AV_LOG_ERROR,
3442                        "Unable to send packet to main thread: %s\n",
3443                        av_err2str(ret));
3444             av_free_packet(&pkt);
3445             av_thread_message_queue_set_err_recv(f->in_thread_queue, ret);
3446             break;
3447         }
3448     }
3449
3450     return NULL;
3451 }
3452
3453 static void free_input_threads(void)
3454 {
3455     int i;
3456
3457     for (i = 0; i < nb_input_files; i++) {
3458         InputFile *f = input_files[i];
3459         AVPacket pkt;
3460
3461         if (!f->in_thread_queue)
3462             continue;
3463         av_thread_message_queue_set_err_send(f->in_thread_queue, AVERROR_EOF);
3464         while (av_thread_message_queue_recv(f->in_thread_queue, &pkt, 0) >= 0)
3465             av_free_packet(&pkt);
3466
3467         pthread_join(f->thread, NULL);
3468         f->joined = 1;
3469         av_thread_message_queue_free(&f->in_thread_queue);
3470     }
3471 }
3472
3473 static int init_input_threads(void)
3474 {
3475     int i, ret;
3476
3477     if (nb_input_files == 1)
3478         return 0;
3479
3480     for (i = 0; i < nb_input_files; i++) {
3481         InputFile *f = input_files[i];
3482
3483         if (f->ctx->pb ? !f->ctx->pb->seekable :
3484             strcmp(f->ctx->iformat->name, "lavfi"))
3485             f->non_blocking = 1;
3486         ret = av_thread_message_queue_alloc(&f->in_thread_queue,
3487                                             f->thread_queue_size, sizeof(AVPacket));
3488         if (ret < 0)
3489             return ret;
3490
3491         if ((ret = pthread_create(&f->thread, NULL, input_thread, f))) {
3492             av_log(NULL, AV_LOG_ERROR, "pthread_create failed: %s. Try to increase `ulimit -v` or decrease `ulimit -s`.\n", strerror(ret));
3493             av_thread_message_queue_free(&f->in_thread_queue);
3494             return AVERROR(ret);
3495         }
3496     }
3497     return 0;
3498 }
3499
3500 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
3501 {
3502     return av_thread_message_queue_recv(f->in_thread_queue, pkt,
3503                                         f->non_blocking ?
3504                                         AV_THREAD_MESSAGE_NONBLOCK : 0);
3505 }
3506 #endif
3507
3508 static int get_input_packet(InputFile *f, AVPacket *pkt)
3509 {
3510     if (f->rate_emu) {
3511         int i;
3512         for (i = 0; i < f->nb_streams; i++) {
3513             InputStream *ist = input_streams[f->ist_index + i];
3514             int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
3515             int64_t now = av_gettime_relative() - ist->start;
3516             if (pts > now)
3517                 return AVERROR(EAGAIN);
3518         }
3519     }
3520
3521 #if HAVE_PTHREADS
3522     if (nb_input_files > 1)
3523         return get_input_packet_mt(f, pkt);
3524 #endif
3525     return av_read_frame(f->ctx, pkt);
3526 }
3527
3528 static int got_eagain(void)
3529 {
3530     int i;
3531     for (i = 0; i < nb_output_streams; i++)
3532         if (output_streams[i]->unavailable)
3533             return 1;
3534     return 0;
3535 }
3536
3537 static void reset_eagain(void)
3538 {
3539     int i;
3540     for (i = 0; i < nb_input_files; i++)
3541         input_files[i]->eagain = 0;
3542     for (i = 0; i < nb_output_streams; i++)
3543         output_streams[i]->unavailable = 0;
3544 }
3545
3546 /*
3547  * Return
3548  * - 0 -- one packet was read and processed
3549  * - AVERROR(EAGAIN) -- no packets were available for selected file,
3550  *   this function should be called again
3551  * - AVERROR_EOF -- this function should not be called again
3552  */
3553 static int process_input(int file_index)
3554 {
3555     InputFile *ifile = input_files[file_index];
3556     AVFormatContext *is;
3557     InputStream *ist;
3558     AVPacket pkt;
3559     int ret, i, j;
3560
3561     is  = ifile->ctx;
3562     ret = get_input_packet(ifile, &pkt);
3563
3564     if (ret == AVERROR(EAGAIN)) {
3565         ifile->eagain = 1;
3566         return ret;
3567     }
3568     if (ret < 0) {
3569         if (ret != AVERROR_EOF) {
3570             print_error(is->filename, ret);
3571             if (exit_on_error)
3572                 exit_program(1);
3573         }
3574
3575         for (i = 0; i < ifile->nb_streams; i++) {
3576             ist = input_streams[ifile->ist_index + i];
3577             if (ist->decoding_needed) {
3578                 ret = process_input_packet(ist, NULL);
3579                 if (ret>0)
3580                     return 0;
3581             }
3582
3583             /* mark all outputs that don't go through lavfi as finished */
3584             for (j = 0; j < nb_output_streams; j++) {
3585                 OutputStream *ost = output_streams[j];
3586
3587                 if (ost->source_index == ifile->ist_index + i &&
3588                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
3589                     finish_output_stream(ost);
3590             }
3591         }
3592
3593         ifile->eof_reached = 1;
3594         return AVERROR(EAGAIN);
3595     }
3596
3597     reset_eagain();
3598
3599     if (do_pkt_dump) {
3600         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3601                          is->streams[pkt.stream_index]);
3602     }