be8b0782ce7a11b9f509c69483b6049c8531ecd2
[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 }
1182
1183 static double psnr(double d)
1184 {
1185     return -10.0 * log(d) / log(10.0);
1186 }
1187
1188 static void do_video_stats(OutputStream *ost, int frame_size)
1189 {
1190     AVCodecContext *enc;
1191     int frame_number;
1192     double ti1, bitrate, avg_bitrate;
1193
1194     /* this is executed just the first time do_video_stats is called */
1195     if (!vstats_file) {
1196         vstats_file = fopen(vstats_filename, "w");
1197         if (!vstats_file) {
1198             perror("fopen");
1199             exit_program(1);
1200         }
1201     }
1202
1203     enc = ost->enc_ctx;
1204     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1205         frame_number = ost->st->nb_frames;
1206         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame ? enc->coded_frame->quality / (float)FF_QP2LAMBDA : 0);
1207         if (enc->coded_frame && (enc->flags&CODEC_FLAG_PSNR))
1208             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1209
1210         fprintf(vstats_file,"f_size= %6d ", frame_size);
1211         /* compute pts value */
1212         ti1 = av_stream_get_end_pts(ost->st) * av_q2d(ost->st->time_base);
1213         if (ti1 < 0.01)
1214             ti1 = 0.01;
1215
1216         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1217         avg_bitrate = (double)(ost->data_size * 8) / ti1 / 1000.0;
1218         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1219                (double)ost->data_size / 1024, ti1, bitrate, avg_bitrate);
1220         fprintf(vstats_file, "type= %c\n", enc->coded_frame ? av_get_picture_type_char(enc->coded_frame->pict_type) : 'I');
1221     }
1222 }
1223
1224 static void finish_output_stream(OutputStream *ost)
1225 {
1226     OutputFile *of = output_files[ost->file_index];
1227     int i;
1228
1229     ost->finished = ENCODER_FINISHED | MUXER_FINISHED;
1230
1231     if (of->shortest) {
1232         for (i = 0; i < of->ctx->nb_streams; i++)
1233             output_streams[of->ost_index + i]->finished = ENCODER_FINISHED | MUXER_FINISHED;
1234     }
1235 }
1236
1237 /**
1238  * Get and encode new output from any of the filtergraphs, without causing
1239  * activity.
1240  *
1241  * @return  0 for success, <0 for severe errors
1242  */
1243 static int reap_filters(int flush)
1244 {
1245     AVFrame *filtered_frame = NULL;
1246     int i;
1247
1248     /* Reap all buffers present in the buffer sinks */
1249     for (i = 0; i < nb_output_streams; i++) {
1250         OutputStream *ost = output_streams[i];
1251         OutputFile    *of = output_files[ost->file_index];
1252         AVFilterContext *filter;
1253         AVCodecContext *enc = ost->enc_ctx;
1254         int ret = 0;
1255
1256         if (!ost->filter)
1257             continue;
1258         filter = ost->filter->filter;
1259
1260         if (!ost->filtered_frame && !(ost->filtered_frame = av_frame_alloc())) {
1261             return AVERROR(ENOMEM);
1262         }
1263         filtered_frame = ost->filtered_frame;
1264
1265         while (1) {
1266             double float_pts = AV_NOPTS_VALUE; // this is identical to filtered_frame.pts but with higher precision
1267             ret = av_buffersink_get_frame_flags(filter, filtered_frame,
1268                                                AV_BUFFERSINK_FLAG_NO_REQUEST);
1269             if (ret < 0) {
1270                 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1271                     av_log(NULL, AV_LOG_WARNING,
1272                            "Error in av_buffersink_get_frame_flags(): %s\n", av_err2str(ret));
1273                 } else if (flush) {
1274                     if (filter->inputs[0]->type == AVMEDIA_TYPE_VIDEO)
1275                         do_video_out(of->ctx, ost, NULL, AV_NOPTS_VALUE);
1276                 }
1277                 break;
1278             }
1279             if (ost->finished) {
1280                 av_frame_unref(filtered_frame);
1281                 continue;
1282             }
1283             if (filtered_frame->pts != AV_NOPTS_VALUE) {
1284                 int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1285                 AVRational tb = enc->time_base;
1286                 int extra_bits = av_clip(29 - av_log2(tb.den), 0, 16);
1287
1288                 tb.den <<= extra_bits;
1289                 float_pts =
1290                     av_rescale_q(filtered_frame->pts, filter->inputs[0]->time_base, tb) -
1291                     av_rescale_q(start_time, AV_TIME_BASE_Q, tb);
1292                 float_pts /= 1 << extra_bits;
1293                 // 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
1294                 float_pts += FFSIGN(float_pts) * 1.0 / (1<<17);
1295
1296                 filtered_frame->pts =
1297                     av_rescale_q(filtered_frame->pts, filter->inputs[0]->time_base, enc->time_base) -
1298                     av_rescale_q(start_time, AV_TIME_BASE_Q, enc->time_base);
1299             }
1300             //if (ost->source_index >= 0)
1301             //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1302
1303             switch (filter->inputs[0]->type) {
1304             case AVMEDIA_TYPE_VIDEO:
1305                 if (!ost->frame_aspect_ratio.num)
1306                     enc->sample_aspect_ratio = filtered_frame->sample_aspect_ratio;
1307
1308                 if (debug_ts) {
1309                     av_log(NULL, AV_LOG_INFO, "filter -> pts:%s pts_time:%s exact:%f time_base:%d/%d\n",
1310                             av_ts2str(filtered_frame->pts), av_ts2timestr(filtered_frame->pts, &enc->time_base),
1311                             float_pts,
1312                             enc->time_base.num, enc->time_base.den);
1313                 }
1314
1315                 do_video_out(of->ctx, ost, filtered_frame, float_pts);
1316                 break;
1317             case AVMEDIA_TYPE_AUDIO:
1318                 if (!(enc->codec->capabilities & CODEC_CAP_PARAM_CHANGE) &&
1319                     enc->channels != av_frame_get_channels(filtered_frame)) {
1320                     av_log(NULL, AV_LOG_ERROR,
1321                            "Audio filter graph output is not normalized and encoder does not support parameter changes\n");
1322                     break;
1323                 }
1324                 do_audio_out(of->ctx, ost, filtered_frame);
1325                 break;
1326             default:
1327                 // TODO support subtitle filters
1328                 av_assert0(0);
1329             }
1330
1331             av_frame_unref(filtered_frame);
1332         }
1333     }
1334
1335     return 0;
1336 }
1337
1338 static void print_final_stats(int64_t total_size)
1339 {
1340     uint64_t video_size = 0, audio_size = 0, extra_size = 0, other_size = 0;
1341     uint64_t subtitle_size = 0;
1342     uint64_t data_size = 0;
1343     float percent = -1.0;
1344     int i, j;
1345
1346     for (i = 0; i < nb_output_streams; i++) {
1347         OutputStream *ost = output_streams[i];
1348         switch (ost->enc_ctx->codec_type) {
1349             case AVMEDIA_TYPE_VIDEO: video_size += ost->data_size; break;
1350             case AVMEDIA_TYPE_AUDIO: audio_size += ost->data_size; break;
1351             case AVMEDIA_TYPE_SUBTITLE: subtitle_size += ost->data_size; break;
1352             default:                 other_size += ost->data_size; break;
1353         }
1354         extra_size += ost->enc_ctx->extradata_size;
1355         data_size  += ost->data_size;
1356     }
1357
1358     if (data_size && total_size>0 && total_size >= data_size)
1359         percent = 100.0 * (total_size - data_size) / data_size;
1360
1361     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: ",
1362            video_size / 1024.0,
1363            audio_size / 1024.0,
1364            subtitle_size / 1024.0,
1365            other_size / 1024.0,
1366            extra_size / 1024.0);
1367     if (percent >= 0.0)
1368         av_log(NULL, AV_LOG_INFO, "%f%%", percent);
1369     else
1370         av_log(NULL, AV_LOG_INFO, "unknown");
1371     av_log(NULL, AV_LOG_INFO, "\n");
1372
1373     /* print verbose per-stream stats */
1374     for (i = 0; i < nb_input_files; i++) {
1375         InputFile *f = input_files[i];
1376         uint64_t total_packets = 0, total_size = 0;
1377
1378         av_log(NULL, AV_LOG_VERBOSE, "Input file #%d (%s):\n",
1379                i, f->ctx->filename);
1380
1381         for (j = 0; j < f->nb_streams; j++) {
1382             InputStream *ist = input_streams[f->ist_index + j];
1383             enum AVMediaType type = ist->dec_ctx->codec_type;
1384
1385             total_size    += ist->data_size;
1386             total_packets += ist->nb_packets;
1387
1388             av_log(NULL, AV_LOG_VERBOSE, "  Input stream #%d:%d (%s): ",
1389                    i, j, media_type_string(type));
1390             av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" packets read (%"PRIu64" bytes); ",
1391                    ist->nb_packets, ist->data_size);
1392
1393             if (ist->decoding_needed) {
1394                 av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" frames decoded",
1395                        ist->frames_decoded);
1396                 if (type == AVMEDIA_TYPE_AUDIO)
1397                     av_log(NULL, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ist->samples_decoded);
1398                 av_log(NULL, AV_LOG_VERBOSE, "; ");
1399             }
1400
1401             av_log(NULL, AV_LOG_VERBOSE, "\n");
1402         }
1403
1404         av_log(NULL, AV_LOG_VERBOSE, "  Total: %"PRIu64" packets (%"PRIu64" bytes) demuxed\n",
1405                total_packets, total_size);
1406     }
1407
1408     for (i = 0; i < nb_output_files; i++) {
1409         OutputFile *of = output_files[i];
1410         uint64_t total_packets = 0, total_size = 0;
1411
1412         av_log(NULL, AV_LOG_VERBOSE, "Output file #%d (%s):\n",
1413                i, of->ctx->filename);
1414
1415         for (j = 0; j < of->ctx->nb_streams; j++) {
1416             OutputStream *ost = output_streams[of->ost_index + j];
1417             enum AVMediaType type = ost->enc_ctx->codec_type;
1418
1419             total_size    += ost->data_size;
1420             total_packets += ost->packets_written;
1421
1422             av_log(NULL, AV_LOG_VERBOSE, "  Output stream #%d:%d (%s): ",
1423                    i, j, media_type_string(type));
1424             if (ost->encoding_needed) {
1425                 av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" frames encoded",
1426                        ost->frames_encoded);
1427                 if (type == AVMEDIA_TYPE_AUDIO)
1428                     av_log(NULL, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ost->samples_encoded);
1429                 av_log(NULL, AV_LOG_VERBOSE, "; ");
1430             }
1431
1432             av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" packets muxed (%"PRIu64" bytes); ",
1433                    ost->packets_written, ost->data_size);
1434
1435             av_log(NULL, AV_LOG_VERBOSE, "\n");
1436         }
1437
1438         av_log(NULL, AV_LOG_VERBOSE, "  Total: %"PRIu64" packets (%"PRIu64" bytes) muxed\n",
1439                total_packets, total_size);
1440     }
1441     if(video_size + data_size + audio_size + subtitle_size + extra_size == 0){
1442         av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
1443     }
1444 }
1445
1446 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
1447 {
1448     char buf[1024];
1449     AVBPrint buf_script;
1450     OutputStream *ost;
1451     AVFormatContext *oc;
1452     int64_t total_size;
1453     AVCodecContext *enc;
1454     int frame_number, vid, i;
1455     double bitrate;
1456     int64_t pts = INT64_MIN;
1457     static int64_t last_time = -1;
1458     static int qp_histogram[52];
1459     int hours, mins, secs, us;
1460
1461     if (!print_stats && !is_last_report && !progress_avio)
1462         return;
1463
1464     if (!is_last_report) {
1465         if (last_time == -1) {
1466             last_time = cur_time;
1467             return;
1468         }
1469         if ((cur_time - last_time) < 500000)
1470             return;
1471         last_time = cur_time;
1472     }
1473
1474
1475     oc = output_files[0]->ctx;
1476
1477     total_size = avio_size(oc->pb);
1478     if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
1479         total_size = avio_tell(oc->pb);
1480
1481     buf[0] = '\0';
1482     vid = 0;
1483     av_bprint_init(&buf_script, 0, 1);
1484     for (i = 0; i < nb_output_streams; i++) {
1485         float q = -1;
1486         ost = output_streams[i];
1487         enc = ost->enc_ctx;
1488         if (!ost->stream_copy && enc->coded_frame)
1489             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1490         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1491             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1492             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1493                        ost->file_index, ost->index, q);
1494         }
1495         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1496             float fps, t = (cur_time-timer_start) / 1000000.0;
1497
1498             frame_number = ost->frame_number;
1499             fps = t > 1 ? frame_number / t : 0;
1500             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
1501                      frame_number, fps < 9.95, fps, q);
1502             av_bprintf(&buf_script, "frame=%d\n", frame_number);
1503             av_bprintf(&buf_script, "fps=%.1f\n", fps);
1504             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1505                        ost->file_index, ost->index, q);
1506             if (is_last_report)
1507                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1508             if (qp_hist) {
1509                 int j;
1510                 int qp = lrintf(q);
1511                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1512                     qp_histogram[qp]++;
1513                 for (j = 0; j < 32; j++)
1514                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
1515             }
1516             if ((enc->flags&CODEC_FLAG_PSNR) && (enc->coded_frame || is_last_report)) {
1517                 int j;
1518                 double error, error_sum = 0;
1519                 double scale, scale_sum = 0;
1520                 double p;
1521                 char type[3] = { 'Y','U','V' };
1522                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1523                 for (j = 0; j < 3; j++) {
1524                     if (is_last_report) {
1525                         error = enc->error[j];
1526                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1527                     } else {
1528                         error = enc->coded_frame->error[j];
1529                         scale = enc->width * enc->height * 255.0 * 255.0;
1530                     }
1531                     if (j)
1532                         scale /= 4;
1533                     error_sum += error;
1534                     scale_sum += scale;
1535                     p = psnr(error / scale);
1536                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], p);
1537                     av_bprintf(&buf_script, "stream_%d_%d_psnr_%c=%2.2f\n",
1538                                ost->file_index, ost->index, type[j] | 32, p);
1539                 }
1540                 p = psnr(error_sum / scale_sum);
1541                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1542                 av_bprintf(&buf_script, "stream_%d_%d_psnr_all=%2.2f\n",
1543                            ost->file_index, ost->index, p);
1544             }
1545             vid = 1;
1546         }
1547         /* compute min output value */
1548         if (av_stream_get_end_pts(ost->st) != AV_NOPTS_VALUE)
1549             pts = FFMAX(pts, av_rescale_q(av_stream_get_end_pts(ost->st),
1550                                           ost->st->time_base, AV_TIME_BASE_Q));
1551         if (is_last_report)
1552             nb_frames_drop += ost->last_droped;
1553     }
1554
1555     secs = FFABS(pts) / AV_TIME_BASE;
1556     us = FFABS(pts) % AV_TIME_BASE;
1557     mins = secs / 60;
1558     secs %= 60;
1559     hours = mins / 60;
1560     mins %= 60;
1561
1562     bitrate = pts && total_size >= 0 ? total_size * 8 / (pts / 1000.0) : -1;
1563
1564     if (total_size < 0) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1565                                  "size=N/A time=");
1566     else                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1567                                  "size=%8.0fkB time=", total_size / 1024.0);
1568     if (pts < 0)
1569         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "-");
1570     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1571              "%02d:%02d:%02d.%02d ", hours, mins, secs,
1572              (100 * us) / AV_TIME_BASE);
1573
1574     if (bitrate < 0) {
1575         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),"bitrate=N/A");
1576         av_bprintf(&buf_script, "bitrate=N/A\n");
1577     }else{
1578         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),"bitrate=%6.1fkbits/s", bitrate);
1579         av_bprintf(&buf_script, "bitrate=%6.1fkbits/s\n", bitrate);
1580     }
1581
1582     if (total_size < 0) av_bprintf(&buf_script, "total_size=N/A\n");
1583     else                av_bprintf(&buf_script, "total_size=%"PRId64"\n", total_size);
1584     av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
1585     av_bprintf(&buf_script, "out_time=%02d:%02d:%02d.%06d\n",
1586                hours, mins, secs, us);
1587
1588     if (nb_frames_dup || nb_frames_drop)
1589         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1590                 nb_frames_dup, nb_frames_drop);
1591     av_bprintf(&buf_script, "dup_frames=%d\n", nb_frames_dup);
1592     av_bprintf(&buf_script, "drop_frames=%d\n", nb_frames_drop);
1593
1594     if (print_stats || is_last_report) {
1595         const char end = is_last_report ? '\n' : '\r';
1596         if (print_stats==1 && AV_LOG_INFO > av_log_get_level()) {
1597             fprintf(stderr, "%s    %c", buf, end);
1598         } else
1599             av_log(NULL, AV_LOG_INFO, "%s    %c", buf, end);
1600
1601     fflush(stderr);
1602     }
1603
1604     if (progress_avio) {
1605         av_bprintf(&buf_script, "progress=%s\n",
1606                    is_last_report ? "end" : "continue");
1607         avio_write(progress_avio, buf_script.str,
1608                    FFMIN(buf_script.len, buf_script.size - 1));
1609         avio_flush(progress_avio);
1610         av_bprint_finalize(&buf_script, NULL);
1611         if (is_last_report) {
1612             avio_closep(&progress_avio);
1613         }
1614     }
1615
1616     if (is_last_report)
1617         print_final_stats(total_size);
1618 }
1619
1620 static void flush_encoders(void)
1621 {
1622     int i, ret;
1623
1624     for (i = 0; i < nb_output_streams; i++) {
1625         OutputStream   *ost = output_streams[i];
1626         AVCodecContext *enc = ost->enc_ctx;
1627         AVFormatContext *os = output_files[ost->file_index]->ctx;
1628         int stop_encoding = 0;
1629
1630         if (!ost->encoding_needed)
1631             continue;
1632
1633         if (enc->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1634             continue;
1635         if (enc->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
1636             continue;
1637
1638         for (;;) {
1639             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1640             const char *desc;
1641
1642             switch (enc->codec_type) {
1643             case AVMEDIA_TYPE_AUDIO:
1644                 encode = avcodec_encode_audio2;
1645                 desc   = "Audio";
1646                 break;
1647             case AVMEDIA_TYPE_VIDEO:
1648                 encode = avcodec_encode_video2;
1649                 desc   = "Video";
1650                 break;
1651             default:
1652                 stop_encoding = 1;
1653             }
1654
1655             if (encode) {
1656                 AVPacket pkt;
1657                 int pkt_size;
1658                 int got_packet;
1659                 av_init_packet(&pkt);
1660                 pkt.data = NULL;
1661                 pkt.size = 0;
1662
1663                 update_benchmark(NULL);
1664                 ret = encode(enc, &pkt, NULL, &got_packet);
1665                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
1666                 if (ret < 0) {
1667                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1668                     exit_program(1);
1669                 }
1670                 if (ost->logfile && enc->stats_out) {
1671                     fprintf(ost->logfile, "%s", enc->stats_out);
1672                 }
1673                 if (!got_packet) {
1674                     stop_encoding = 1;
1675                     break;
1676                 }
1677                 if (ost->finished & MUXER_FINISHED) {
1678                     av_free_packet(&pkt);
1679                     continue;
1680                 }
1681                 av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
1682                 pkt_size = pkt.size;
1683                 write_frame(os, &pkt, ost);
1684                 if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO && vstats_filename) {
1685                     do_video_stats(ost, pkt_size);
1686                 }
1687             }
1688
1689             if (stop_encoding)
1690                 break;
1691         }
1692     }
1693 }
1694
1695 /*
1696  * Check whether a packet from ist should be written into ost at this time
1697  */
1698 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1699 {
1700     OutputFile *of = output_files[ost->file_index];
1701     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1702
1703     if (ost->source_index != ist_index)
1704         return 0;
1705
1706     if (ost->finished)
1707         return 0;
1708
1709     if (of->start_time != AV_NOPTS_VALUE && ist->pts < of->start_time)
1710         return 0;
1711
1712     return 1;
1713 }
1714
1715 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1716 {
1717     OutputFile *of = output_files[ost->file_index];
1718     InputFile   *f = input_files [ist->file_index];
1719     int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1720     int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);
1721     int64_t ist_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ist->st->time_base);
1722     AVPicture pict;
1723     AVPacket opkt;
1724
1725     av_init_packet(&opkt);
1726
1727     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1728         !ost->copy_initial_nonkeyframes)
1729         return;
1730
1731     if (pkt->pts == AV_NOPTS_VALUE) {
1732         if (!ost->frame_number && ist->pts < start_time &&
1733             !ost->copy_prior_start)
1734             return;
1735     } else {
1736         if (!ost->frame_number && pkt->pts < ist_tb_start_time &&
1737             !ost->copy_prior_start)
1738             return;
1739     }
1740
1741     if (of->recording_time != INT64_MAX &&
1742         ist->pts >= of->recording_time + start_time) {
1743         close_output_stream(ost);
1744         return;
1745     }
1746
1747     if (f->recording_time != INT64_MAX) {
1748         start_time = f->ctx->start_time;
1749         if (f->start_time != AV_NOPTS_VALUE)
1750             start_time += f->start_time;
1751         if (ist->pts >= f->recording_time + start_time) {
1752             close_output_stream(ost);
1753             return;
1754         }
1755     }
1756
1757     /* force the input stream PTS */
1758     if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO)
1759         ost->sync_opts++;
1760
1761     if (pkt->pts != AV_NOPTS_VALUE)
1762         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1763     else
1764         opkt.pts = AV_NOPTS_VALUE;
1765
1766     if (pkt->dts == AV_NOPTS_VALUE)
1767         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
1768     else
1769         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1770     opkt.dts -= ost_tb_start_time;
1771
1772     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1773         int duration = av_get_audio_frame_duration(ist->dec_ctx, pkt->size);
1774         if(!duration)
1775             duration = ist->dec_ctx->frame_size;
1776         opkt.dts = opkt.pts = av_rescale_delta(ist->st->time_base, pkt->dts,
1777                                                (AVRational){1, ist->dec_ctx->sample_rate}, duration, &ist->filter_in_rescale_delta_last,
1778                                                ost->st->time_base) - ost_tb_start_time;
1779     }
1780
1781     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1782     opkt.flags    = pkt->flags;
1783
1784     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1785     if (  ost->enc_ctx->codec_id != AV_CODEC_ID_H264
1786        && ost->enc_ctx->codec_id != AV_CODEC_ID_MPEG1VIDEO
1787        && ost->enc_ctx->codec_id != AV_CODEC_ID_MPEG2VIDEO
1788        && ost->enc_ctx->codec_id != AV_CODEC_ID_VC1
1789        ) {
1790         if (av_parser_change(ost->parser, ost->st->codec,
1791                              &opkt.data, &opkt.size,
1792                              pkt->data, pkt->size,
1793                              pkt->flags & AV_PKT_FLAG_KEY)) {
1794             opkt.buf = av_buffer_create(opkt.data, opkt.size, av_buffer_default_free, NULL, 0);
1795             if (!opkt.buf)
1796                 exit_program(1);
1797         }
1798     } else {
1799         opkt.data = pkt->data;
1800         opkt.size = pkt->size;
1801     }
1802     av_copy_packet_side_data(&opkt, pkt);
1803
1804     if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (of->ctx->oformat->flags & AVFMT_RAWPICTURE)) {
1805         /* store AVPicture in AVPacket, as expected by the output format */
1806         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
1807         opkt.data = (uint8_t *)&pict;
1808         opkt.size = sizeof(AVPicture);
1809         opkt.flags |= AV_PKT_FLAG_KEY;
1810     }
1811
1812     write_frame(of->ctx, &opkt, ost);
1813 }
1814
1815 int guess_input_channel_layout(InputStream *ist)
1816 {
1817     AVCodecContext *dec = ist->dec_ctx;
1818
1819     if (!dec->channel_layout) {
1820         char layout_name[256];
1821
1822         if (dec->channels > ist->guess_layout_max)
1823             return 0;
1824         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1825         if (!dec->channel_layout)
1826             return 0;
1827         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1828                                      dec->channels, dec->channel_layout);
1829         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1830                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1831     }
1832     return 1;
1833 }
1834
1835 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1836 {
1837     AVFrame *decoded_frame, *f;
1838     AVCodecContext *avctx = ist->dec_ctx;
1839     int i, ret, err = 0, resample_changed;
1840     AVRational decoded_frame_tb;
1841
1842     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1843         return AVERROR(ENOMEM);
1844     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1845         return AVERROR(ENOMEM);
1846     decoded_frame = ist->decoded_frame;
1847
1848     update_benchmark(NULL);
1849     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1850     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
1851
1852     if (ret >= 0 && avctx->sample_rate <= 0) {
1853         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
1854         ret = AVERROR_INVALIDDATA;
1855     }
1856
1857     if (*got_output || ret<0 || pkt->size)
1858         decode_error_stat[ret<0] ++;
1859
1860     if (!*got_output || ret < 0) {
1861         if (!pkt->size) {
1862             for (i = 0; i < ist->nb_filters; i++)
1863 #if 1
1864                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1865 #else
1866                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
1867 #endif
1868         }
1869         return ret;
1870     }
1871
1872     ist->samples_decoded += decoded_frame->nb_samples;
1873     ist->frames_decoded++;
1874
1875 #if 1
1876     /* increment next_dts to use for the case where the input stream does not
1877        have timestamps or there are multiple frames in the packet */
1878     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1879                      avctx->sample_rate;
1880     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1881                      avctx->sample_rate;
1882 #endif
1883
1884     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1885                        ist->resample_channels       != avctx->channels               ||
1886                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1887                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1888     if (resample_changed) {
1889         char layout1[64], layout2[64];
1890
1891         if (!guess_input_channel_layout(ist)) {
1892             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1893                    "layout for Input Stream #%d.%d\n", ist->file_index,
1894                    ist->st->index);
1895             exit_program(1);
1896         }
1897         decoded_frame->channel_layout = avctx->channel_layout;
1898
1899         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1900                                      ist->resample_channel_layout);
1901         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1902                                      decoded_frame->channel_layout);
1903
1904         av_log(NULL, AV_LOG_INFO,
1905                "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",
1906                ist->file_index, ist->st->index,
1907                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1908                ist->resample_channels, layout1,
1909                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1910                avctx->channels, layout2);
1911
1912         ist->resample_sample_fmt     = decoded_frame->format;
1913         ist->resample_sample_rate    = decoded_frame->sample_rate;
1914         ist->resample_channel_layout = decoded_frame->channel_layout;
1915         ist->resample_channels       = avctx->channels;
1916
1917         for (i = 0; i < nb_filtergraphs; i++)
1918             if (ist_in_filtergraph(filtergraphs[i], ist)) {
1919                 FilterGraph *fg = filtergraphs[i];
1920                 if (configure_filtergraph(fg) < 0) {
1921                     av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1922                     exit_program(1);
1923                 }
1924             }
1925     }
1926
1927     /* if the decoder provides a pts, use it instead of the last packet pts.
1928        the decoder could be delaying output by a packet or more. */
1929     if (decoded_frame->pts != AV_NOPTS_VALUE) {
1930         ist->dts = ist->next_dts = ist->pts = ist->next_pts = av_rescale_q(decoded_frame->pts, avctx->time_base, AV_TIME_BASE_Q);
1931         decoded_frame_tb   = avctx->time_base;
1932     } else if (decoded_frame->pkt_pts != AV_NOPTS_VALUE) {
1933         decoded_frame->pts = decoded_frame->pkt_pts;
1934         decoded_frame_tb   = ist->st->time_base;
1935     } else if (pkt->pts != AV_NOPTS_VALUE) {
1936         decoded_frame->pts = pkt->pts;
1937         decoded_frame_tb   = ist->st->time_base;
1938     }else {
1939         decoded_frame->pts = ist->dts;
1940         decoded_frame_tb   = AV_TIME_BASE_Q;
1941     }
1942     pkt->pts           = AV_NOPTS_VALUE;
1943     if (decoded_frame->pts != AV_NOPTS_VALUE)
1944         decoded_frame->pts = av_rescale_delta(decoded_frame_tb, decoded_frame->pts,
1945                                               (AVRational){1, avctx->sample_rate}, decoded_frame->nb_samples, &ist->filter_in_rescale_delta_last,
1946                                               (AVRational){1, avctx->sample_rate});
1947     for (i = 0; i < ist->nb_filters; i++) {
1948         if (i < ist->nb_filters - 1) {
1949             f = ist->filter_frame;
1950             err = av_frame_ref(f, decoded_frame);
1951             if (err < 0)
1952                 break;
1953         } else
1954             f = decoded_frame;
1955         err = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f,
1956                                      AV_BUFFERSRC_FLAG_PUSH);
1957         if (err == AVERROR_EOF)
1958             err = 0; /* ignore */
1959         if (err < 0)
1960             break;
1961     }
1962     decoded_frame->pts = AV_NOPTS_VALUE;
1963
1964     av_frame_unref(ist->filter_frame);
1965     av_frame_unref(decoded_frame);
1966     return err < 0 ? err : ret;
1967 }
1968
1969 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1970 {
1971     AVFrame *decoded_frame, *f;
1972     int i, ret = 0, err = 0, resample_changed;
1973     int64_t best_effort_timestamp;
1974     AVRational *frame_sample_aspect;
1975
1976     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1977         return AVERROR(ENOMEM);
1978     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1979         return AVERROR(ENOMEM);
1980     decoded_frame = ist->decoded_frame;
1981     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
1982
1983     update_benchmark(NULL);
1984     ret = avcodec_decode_video2(ist->dec_ctx,
1985                                 decoded_frame, got_output, pkt);
1986     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
1987
1988     // The following line may be required in some cases where there is no parser
1989     // or the parser does not has_b_frames correctly
1990     if (ist->st->codec->has_b_frames < ist->dec_ctx->has_b_frames) {
1991         if (ist->dec_ctx->codec_id == AV_CODEC_ID_H264) {
1992             ist->st->codec->has_b_frames = ist->dec_ctx->has_b_frames;
1993         } else
1994             av_log_ask_for_sample(
1995                 ist->dec_ctx,
1996                 "has_b_frames is larger in decoder than demuxer %d > %d ",
1997                 ist->dec_ctx->has_b_frames,
1998                 ist->st->codec->has_b_frames
1999             );
2000     }
2001
2002     if (*got_output || ret<0 || pkt->size)
2003         decode_error_stat[ret<0] ++;
2004
2005     if (*got_output && ret >= 0) {
2006         if (ist->dec_ctx->width  != decoded_frame->width ||
2007             ist->dec_ctx->height != decoded_frame->height ||
2008             ist->dec_ctx->pix_fmt != decoded_frame->format) {
2009             av_log(NULL, AV_LOG_DEBUG, "Frame parameters mismatch context %d,%d,%d != %d,%d,%d\n",
2010                 decoded_frame->width,
2011                 decoded_frame->height,
2012                 decoded_frame->format,
2013                 ist->dec_ctx->width,
2014                 ist->dec_ctx->height,
2015                 ist->dec_ctx->pix_fmt);
2016         }
2017     }
2018
2019     if (!*got_output || ret < 0) {
2020         if (!pkt->size) {
2021             for (i = 0; i < ist->nb_filters; i++)
2022 #if 1
2023                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
2024 #else
2025                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
2026 #endif
2027         }
2028         return ret;
2029     }
2030
2031     if(ist->top_field_first>=0)
2032         decoded_frame->top_field_first = ist->top_field_first;
2033
2034     ist->frames_decoded++;
2035
2036     if (ist->hwaccel_retrieve_data && decoded_frame->format == ist->hwaccel_pix_fmt) {
2037         err = ist->hwaccel_retrieve_data(ist->dec_ctx, decoded_frame);
2038         if (err < 0)
2039             goto fail;
2040     }
2041     ist->hwaccel_retrieved_pix_fmt = decoded_frame->format;
2042
2043     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
2044     if(best_effort_timestamp != AV_NOPTS_VALUE)
2045         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
2046
2047     if (debug_ts) {
2048         av_log(NULL, AV_LOG_INFO, "decoder -> ist_index:%d type:video "
2049                "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",
2050                ist->st->index, av_ts2str(decoded_frame->pts),
2051                av_ts2timestr(decoded_frame->pts, &ist->st->time_base),
2052                best_effort_timestamp,
2053                av_ts2timestr(best_effort_timestamp, &ist->st->time_base),
2054                decoded_frame->key_frame, decoded_frame->pict_type,
2055                ist->st->time_base.num, ist->st->time_base.den);
2056     }
2057
2058     pkt->size = 0;
2059
2060     if (ist->st->sample_aspect_ratio.num)
2061         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2062
2063     resample_changed = ist->resample_width   != decoded_frame->width  ||
2064                        ist->resample_height  != decoded_frame->height ||
2065                        ist->resample_pix_fmt != decoded_frame->format;
2066     if (resample_changed) {
2067         av_log(NULL, AV_LOG_INFO,
2068                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2069                ist->file_index, ist->st->index,
2070                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2071                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2072
2073         ist->resample_width   = decoded_frame->width;
2074         ist->resample_height  = decoded_frame->height;
2075         ist->resample_pix_fmt = decoded_frame->format;
2076
2077         for (i = 0; i < nb_filtergraphs; i++) {
2078             if (ist_in_filtergraph(filtergraphs[i], ist) && ist->reinit_filters &&
2079                 configure_filtergraph(filtergraphs[i]) < 0) {
2080                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2081                 exit_program(1);
2082             }
2083         }
2084     }
2085
2086     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2087     for (i = 0; i < ist->nb_filters; i++) {
2088         if (!frame_sample_aspect->num)
2089             *frame_sample_aspect = ist->st->sample_aspect_ratio;
2090
2091         if (i < ist->nb_filters - 1) {
2092             f = ist->filter_frame;
2093             err = av_frame_ref(f, decoded_frame);
2094             if (err < 0)
2095                 break;
2096         } else
2097             f = decoded_frame;
2098         ret = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f, AV_BUFFERSRC_FLAG_PUSH);
2099         if (ret == AVERROR_EOF) {
2100             ret = 0; /* ignore */
2101         } else if (ret < 0) {
2102             av_log(NULL, AV_LOG_FATAL,
2103                    "Failed to inject frame into filter network: %s\n", av_err2str(ret));
2104             exit_program(1);
2105         }
2106     }
2107
2108 fail:
2109     av_frame_unref(ist->filter_frame);
2110     av_frame_unref(decoded_frame);
2111     return err < 0 ? err : ret;
2112 }
2113
2114 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2115 {
2116     AVSubtitle subtitle;
2117     int i, ret = avcodec_decode_subtitle2(ist->dec_ctx,
2118                                           &subtitle, got_output, pkt);
2119
2120     if (*got_output || ret<0 || pkt->size)
2121         decode_error_stat[ret<0] ++;
2122
2123     if (ret < 0 || !*got_output) {
2124         if (!pkt->size)
2125             sub2video_flush(ist);
2126         return ret;
2127     }
2128
2129     if (ist->fix_sub_duration) {
2130         int end = 1;
2131         if (ist->prev_sub.got_output) {
2132             end = av_rescale(subtitle.pts - ist->prev_sub.subtitle.pts,
2133                              1000, AV_TIME_BASE);
2134             if (end < ist->prev_sub.subtitle.end_display_time) {
2135                 av_log(ist->dec_ctx, AV_LOG_DEBUG,
2136                        "Subtitle duration reduced from %d to %d%s\n",
2137                        ist->prev_sub.subtitle.end_display_time, end,
2138                        end <= 0 ? ", dropping it" : "");
2139                 ist->prev_sub.subtitle.end_display_time = end;
2140             }
2141         }
2142         FFSWAP(int,        *got_output, ist->prev_sub.got_output);
2143         FFSWAP(int,        ret,         ist->prev_sub.ret);
2144         FFSWAP(AVSubtitle, subtitle,    ist->prev_sub.subtitle);
2145         if (end <= 0)
2146             goto out;
2147     }
2148
2149     if (!*got_output)
2150         return ret;
2151
2152     sub2video_update(ist, &subtitle);
2153
2154     if (!subtitle.num_rects)
2155         goto out;
2156
2157     ist->frames_decoded++;
2158
2159     for (i = 0; i < nb_output_streams; i++) {
2160         OutputStream *ost = output_streams[i];
2161
2162         if (!check_output_constraints(ist, ost) || !ost->encoding_needed
2163             || ost->enc->type != AVMEDIA_TYPE_SUBTITLE)
2164             continue;
2165
2166         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle);
2167     }
2168
2169 out:
2170     avsubtitle_free(&subtitle);
2171     return ret;
2172 }
2173
2174 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2175 static int process_input_packet(InputStream *ist, const AVPacket *pkt)
2176 {
2177     int ret = 0, i;
2178     int got_output = 0;
2179
2180     AVPacket avpkt;
2181     if (!ist->saw_first_ts) {
2182         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;
2183         ist->pts = 0;
2184         if (pkt && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
2185             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2186             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
2187         }
2188         ist->saw_first_ts = 1;
2189     }
2190
2191     if (ist->next_dts == AV_NOPTS_VALUE)
2192         ist->next_dts = ist->dts;
2193     if (ist->next_pts == AV_NOPTS_VALUE)
2194         ist->next_pts = ist->pts;
2195
2196     if (!pkt) {
2197         /* EOF handling */
2198         av_init_packet(&avpkt);
2199         avpkt.data = NULL;
2200         avpkt.size = 0;
2201         goto handle_eof;
2202     } else {
2203         avpkt = *pkt;
2204     }
2205
2206     if (pkt->dts != AV_NOPTS_VALUE) {
2207         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2208         if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2209             ist->next_pts = ist->pts = ist->dts;
2210     }
2211
2212     // while we have more to decode or while the decoder did output something on EOF
2213     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2214         int duration;
2215     handle_eof:
2216
2217         ist->pts = ist->next_pts;
2218         ist->dts = ist->next_dts;
2219
2220         if (avpkt.size && avpkt.size != pkt->size &&
2221             !(ist->dec->capabilities & CODEC_CAP_SUBFRAMES)) {
2222             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2223                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2224             ist->showed_multi_packet_warning = 1;
2225         }
2226
2227         switch (ist->dec_ctx->codec_type) {
2228         case AVMEDIA_TYPE_AUDIO:
2229             ret = decode_audio    (ist, &avpkt, &got_output);
2230             break;
2231         case AVMEDIA_TYPE_VIDEO:
2232             ret = decode_video    (ist, &avpkt, &got_output);
2233             if (avpkt.duration) {
2234                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2235             } else if(ist->dec_ctx->framerate.num != 0 && ist->dec_ctx->framerate.den != 0) {
2236                 int ticks= av_stream_get_parser(ist->st) ? av_stream_get_parser(ist->st)->repeat_pict+1 : ist->dec_ctx->ticks_per_frame;
2237                 duration = ((int64_t)AV_TIME_BASE *
2238                                 ist->dec_ctx->framerate.den * ticks) /
2239                                 ist->dec_ctx->framerate.num / ist->dec_ctx->ticks_per_frame;
2240             } else
2241                 duration = 0;
2242
2243             if(ist->dts != AV_NOPTS_VALUE && duration) {
2244                 ist->next_dts += duration;
2245             }else
2246                 ist->next_dts = AV_NOPTS_VALUE;
2247
2248             if (got_output)
2249                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
2250             break;
2251         case AVMEDIA_TYPE_SUBTITLE:
2252             ret = transcode_subtitles(ist, &avpkt, &got_output);
2253             break;
2254         default:
2255             return -1;
2256         }
2257
2258         if (ret < 0)
2259             return ret;
2260
2261         avpkt.dts=
2262         avpkt.pts= AV_NOPTS_VALUE;
2263
2264         // touch data and size only if not EOF
2265         if (pkt) {
2266             if(ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO)
2267                 ret = avpkt.size;
2268             avpkt.data += ret;
2269             avpkt.size -= ret;
2270         }
2271         if (!got_output) {
2272             continue;
2273         }
2274         if (got_output && !pkt)
2275             break;
2276     }
2277
2278     /* handle stream copy */
2279     if (!ist->decoding_needed) {
2280         ist->dts = ist->next_dts;
2281         switch (ist->dec_ctx->codec_type) {
2282         case AVMEDIA_TYPE_AUDIO:
2283             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->dec_ctx->frame_size) /
2284                              ist->dec_ctx->sample_rate;
2285             break;
2286         case AVMEDIA_TYPE_VIDEO:
2287             if (ist->framerate.num) {
2288                 // TODO: Remove work-around for c99-to-c89 issue 7
2289                 AVRational time_base_q = AV_TIME_BASE_Q;
2290                 int64_t next_dts = av_rescale_q(ist->next_dts, time_base_q, av_inv_q(ist->framerate));
2291                 ist->next_dts = av_rescale_q(next_dts + 1, av_inv_q(ist->framerate), time_base_q);
2292             } else if (pkt->duration) {
2293                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2294             } else if(ist->dec_ctx->framerate.num != 0) {
2295                 int ticks= av_stream_get_parser(ist->st) ? av_stream_get_parser(ist->st)->repeat_pict + 1 : ist->dec_ctx->ticks_per_frame;
2296                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2297                                   ist->dec_ctx->framerate.den * ticks) /
2298                                   ist->dec_ctx->framerate.num / ist->dec_ctx->ticks_per_frame;
2299             }
2300             break;
2301         }
2302         ist->pts = ist->dts;
2303         ist->next_pts = ist->next_dts;
2304     }
2305     for (i = 0; pkt && i < nb_output_streams; i++) {
2306         OutputStream *ost = output_streams[i];
2307
2308         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2309             continue;
2310
2311         do_streamcopy(ist, ost, pkt);
2312     }
2313
2314     return got_output;
2315 }
2316
2317 static void print_sdp(void)
2318 {
2319     char sdp[16384];
2320     int i;
2321     int j;
2322     AVIOContext *sdp_pb;
2323     AVFormatContext **avc = av_malloc_array(nb_output_files, sizeof(*avc));
2324
2325     if (!avc)
2326         exit_program(1);
2327     for (i = 0, j = 0; i < nb_output_files; i++) {
2328         if (!strcmp(output_files[i]->ctx->oformat->name, "rtp")) {
2329             avc[j] = output_files[i]->ctx;
2330             j++;
2331         }
2332     }
2333
2334     av_sdp_create(avc, j, sdp, sizeof(sdp));
2335
2336     if (!sdp_filename) {
2337         printf("SDP:\n%s\n", sdp);
2338         fflush(stdout);
2339     } else {
2340         if (avio_open2(&sdp_pb, sdp_filename, AVIO_FLAG_WRITE, &int_cb, NULL) < 0) {
2341             av_log(NULL, AV_LOG_ERROR, "Failed to open sdp file '%s'\n", sdp_filename);
2342         } else {
2343             avio_printf(sdp_pb, "SDP:\n%s", sdp);
2344             avio_closep(&sdp_pb);
2345             av_freep(&sdp_filename);
2346         }
2347     }
2348
2349     av_freep(&avc);
2350 }
2351
2352 static const HWAccel *get_hwaccel(enum AVPixelFormat pix_fmt)
2353 {
2354     int i;
2355     for (i = 0; hwaccels[i].name; i++)
2356         if (hwaccels[i].pix_fmt == pix_fmt)
2357             return &hwaccels[i];
2358     return NULL;
2359 }
2360
2361 static enum AVPixelFormat get_format(AVCodecContext *s, const enum AVPixelFormat *pix_fmts)
2362 {
2363     InputStream *ist = s->opaque;
2364     const enum AVPixelFormat *p;
2365     int ret;
2366
2367     for (p = pix_fmts; *p != -1; p++) {
2368         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(*p);
2369         const HWAccel *hwaccel;
2370
2371         if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
2372             break;
2373
2374         hwaccel = get_hwaccel(*p);
2375         if (!hwaccel ||
2376             (ist->active_hwaccel_id && ist->active_hwaccel_id != hwaccel->id) ||
2377             (ist->hwaccel_id != HWACCEL_AUTO && ist->hwaccel_id != hwaccel->id))
2378             continue;
2379
2380         ret = hwaccel->init(s);
2381         if (ret < 0) {
2382             if (ist->hwaccel_id == hwaccel->id) {
2383                 av_log(NULL, AV_LOG_FATAL,
2384                        "%s hwaccel requested for input stream #%d:%d, "
2385                        "but cannot be initialized.\n", hwaccel->name,
2386                        ist->file_index, ist->st->index);
2387                 return AV_PIX_FMT_NONE;
2388             }
2389             continue;
2390         }
2391         ist->active_hwaccel_id = hwaccel->id;
2392         ist->hwaccel_pix_fmt   = *p;
2393         break;
2394     }
2395
2396     return *p;
2397 }
2398
2399 static int get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
2400 {
2401     InputStream *ist = s->opaque;
2402
2403     if (ist->hwaccel_get_buffer && frame->format == ist->hwaccel_pix_fmt)
2404         return ist->hwaccel_get_buffer(s, frame, flags);
2405
2406     return avcodec_default_get_buffer2(s, frame, flags);
2407 }
2408
2409 static int init_input_stream(int ist_index, char *error, int error_len)
2410 {
2411     int ret;
2412     InputStream *ist = input_streams[ist_index];
2413
2414     if (ist->decoding_needed) {
2415         AVCodec *codec = ist->dec;
2416         if (!codec) {
2417             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2418                     avcodec_get_name(ist->dec_ctx->codec_id), ist->file_index, ist->st->index);
2419             return AVERROR(EINVAL);
2420         }
2421
2422         ist->dec_ctx->opaque                = ist;
2423         ist->dec_ctx->get_format            = get_format;
2424         ist->dec_ctx->get_buffer2           = get_buffer;
2425         ist->dec_ctx->thread_safe_callbacks = 1;
2426
2427         av_opt_set_int(ist->dec_ctx, "refcounted_frames", 1, 0);
2428         if (ist->dec_ctx->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
2429            (ist->decoding_needed & DECODING_FOR_OST)) {
2430             av_dict_set(&ist->decoder_opts, "compute_edt", "1", AV_DICT_DONT_OVERWRITE);
2431             if (ist->decoding_needed & DECODING_FOR_FILTER)
2432                 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");
2433         }
2434
2435         if (!av_dict_get(ist->decoder_opts, "threads", NULL, 0))
2436             av_dict_set(&ist->decoder_opts, "threads", "auto", 0);
2437         if ((ret = avcodec_open2(ist->dec_ctx, codec, &ist->decoder_opts)) < 0) {
2438             if (ret == AVERROR_EXPERIMENTAL)
2439                 abort_codec_experimental(codec, 0);
2440
2441             snprintf(error, error_len,
2442                      "Error while opening decoder for input stream "
2443                      "#%d:%d : %s",
2444                      ist->file_index, ist->st->index, av_err2str(ret));
2445             return ret;
2446         }
2447         assert_avoptions(ist->decoder_opts);
2448     }
2449
2450     ist->next_pts = AV_NOPTS_VALUE;
2451     ist->next_dts = AV_NOPTS_VALUE;
2452
2453     return 0;
2454 }
2455
2456 static InputStream *get_input_stream(OutputStream *ost)
2457 {
2458     if (ost->source_index >= 0)
2459         return input_streams[ost->source_index];
2460     return NULL;
2461 }
2462
2463 static int compare_int64(const void *a, const void *b)
2464 {
2465     int64_t va = *(int64_t *)a, vb = *(int64_t *)b;
2466     return va < vb ? -1 : va > vb ? +1 : 0;
2467 }
2468
2469 static void parse_forced_key_frames(char *kf, OutputStream *ost,
2470                                     AVCodecContext *avctx)
2471 {
2472     char *p;
2473     int n = 1, i, size, index = 0;
2474     int64_t t, *pts;
2475
2476     for (p = kf; *p; p++)
2477         if (*p == ',')
2478             n++;
2479     size = n;
2480     pts = av_malloc_array(size, sizeof(*pts));
2481     if (!pts) {
2482         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
2483         exit_program(1);
2484     }
2485
2486     p = kf;
2487     for (i = 0; i < n; i++) {
2488         char *next = strchr(p, ',');
2489
2490         if (next)
2491             *next++ = 0;
2492
2493         if (!memcmp(p, "chapters", 8)) {
2494
2495             AVFormatContext *avf = output_files[ost->file_index]->ctx;
2496             int j;
2497
2498             if (avf->nb_chapters > INT_MAX - size ||
2499                 !(pts = av_realloc_f(pts, size += avf->nb_chapters - 1,
2500                                      sizeof(*pts)))) {
2501                 av_log(NULL, AV_LOG_FATAL,
2502                        "Could not allocate forced key frames array.\n");
2503                 exit_program(1);
2504             }
2505             t = p[8] ? parse_time_or_die("force_key_frames", p + 8, 1) : 0;
2506             t = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2507
2508             for (j = 0; j < avf->nb_chapters; j++) {
2509                 AVChapter *c = avf->chapters[j];
2510                 av_assert1(index < size);
2511                 pts[index++] = av_rescale_q(c->start, c->time_base,
2512                                             avctx->time_base) + t;
2513             }
2514
2515         } else {
2516
2517             t = parse_time_or_die("force_key_frames", p, 1);
2518             av_assert1(index < size);
2519             pts[index++] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2520
2521         }
2522
2523         p = next;
2524     }
2525
2526     av_assert0(index == size);
2527     qsort(pts, size, sizeof(*pts), compare_int64);
2528     ost->forced_kf_count = size;
2529     ost->forced_kf_pts   = pts;
2530 }
2531
2532 static void report_new_stream(int input_index, AVPacket *pkt)
2533 {
2534     InputFile *file = input_files[input_index];
2535     AVStream *st = file->ctx->streams[pkt->stream_index];
2536
2537     if (pkt->stream_index < file->nb_streams_warn)
2538         return;
2539     av_log(file->ctx, AV_LOG_WARNING,
2540            "New %s stream %d:%d at pos:%"PRId64" and DTS:%ss\n",
2541            av_get_media_type_string(st->codec->codec_type),
2542            input_index, pkt->stream_index,
2543            pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
2544     file->nb_streams_warn = pkt->stream_index + 1;
2545 }
2546
2547 static void set_encoder_id(OutputFile *of, OutputStream *ost)
2548 {
2549     AVDictionaryEntry *e;
2550
2551     uint8_t *encoder_string;
2552     int encoder_string_len;
2553     int format_flags = 0;
2554     int codec_flags = 0;
2555
2556     if (av_dict_get(ost->st->metadata, "encoder",  NULL, 0))
2557         return;
2558
2559     e = av_dict_get(of->opts, "fflags", NULL, 0);
2560     if (e) {
2561         const AVOption *o = av_opt_find(of->ctx, "fflags", NULL, 0, 0);
2562         if (!o)
2563             return;
2564         av_opt_eval_flags(of->ctx, o, e->value, &format_flags);
2565     }
2566     e = av_dict_get(ost->encoder_opts, "flags", NULL, 0);
2567     if (e) {
2568         const AVOption *o = av_opt_find(ost->enc_ctx, "flags", NULL, 0, 0);
2569         if (!o)
2570             return;
2571         av_opt_eval_flags(ost->enc_ctx, o, e->value, &codec_flags);
2572     }
2573
2574     encoder_string_len = sizeof(LIBAVCODEC_IDENT) + strlen(ost->enc->name) + 2;
2575     encoder_string     = av_mallocz(encoder_string_len);
2576     if (!encoder_string)
2577         exit_program(1);
2578
2579     if (!(format_flags & AVFMT_FLAG_BITEXACT) && !(codec_flags & CODEC_FLAG_BITEXACT))
2580         av_strlcpy(encoder_string, LIBAVCODEC_IDENT " ", encoder_string_len);
2581     else
2582         av_strlcpy(encoder_string, "Lavc ", encoder_string_len);
2583     av_strlcat(encoder_string, ost->enc->name, encoder_string_len);
2584     av_dict_set(&ost->st->metadata, "encoder",  encoder_string,
2585                 AV_DICT_DONT_STRDUP_VAL | AV_DICT_DONT_OVERWRITE);
2586 }
2587
2588 static int transcode_init(void)
2589 {
2590     int ret = 0, i, j, k;
2591     AVFormatContext *oc;
2592     OutputStream *ost;
2593     InputStream *ist;
2594     char error[1024] = {0};
2595     int want_sdp = 1;
2596
2597     for (i = 0; i < nb_filtergraphs; i++) {
2598         FilterGraph *fg = filtergraphs[i];
2599         for (j = 0; j < fg->nb_outputs; j++) {
2600             OutputFilter *ofilter = fg->outputs[j];
2601             if (!ofilter->ost || ofilter->ost->source_index >= 0)
2602                 continue;
2603             if (fg->nb_inputs != 1)
2604                 continue;
2605             for (k = nb_input_streams-1; k >= 0 ; k--)
2606                 if (fg->inputs[0]->ist == input_streams[k])
2607                     break;
2608             ofilter->ost->source_index = k;
2609         }
2610     }
2611
2612     /* init framerate emulation */
2613     for (i = 0; i < nb_input_files; i++) {
2614         InputFile *ifile = input_files[i];
2615         if (ifile->rate_emu)
2616             for (j = 0; j < ifile->nb_streams; j++)
2617                 input_streams[j + ifile->ist_index]->start = av_gettime_relative();
2618     }
2619
2620     /* output stream init */
2621     for (i = 0; i < nb_output_files; i++) {
2622         oc = output_files[i]->ctx;
2623         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2624             av_dump_format(oc, i, oc->filename, 1);
2625             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2626             return AVERROR(EINVAL);
2627         }
2628     }
2629
2630     /* init complex filtergraphs */
2631     for (i = 0; i < nb_filtergraphs; i++)
2632         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2633             return ret;
2634
2635     /* for each output stream, we compute the right encoding parameters */
2636     for (i = 0; i < nb_output_streams; i++) {
2637         AVCodecContext *enc_ctx;
2638         AVCodecContext *dec_ctx = NULL;
2639         ost = output_streams[i];
2640         oc  = output_files[ost->file_index]->ctx;
2641         ist = get_input_stream(ost);
2642
2643         if (ost->attachment_filename)
2644             continue;
2645
2646         enc_ctx = ost->stream_copy ? ost->st->codec : ost->enc_ctx;
2647
2648         if (ist) {
2649             dec_ctx = ist->dec_ctx;
2650
2651             ost->st->disposition          = ist->st->disposition;
2652             enc_ctx->bits_per_raw_sample    = dec_ctx->bits_per_raw_sample;
2653             enc_ctx->chroma_sample_location = dec_ctx->chroma_sample_location;
2654         } else {
2655             for (j=0; j<oc->nb_streams; j++) {
2656                 AVStream *st = oc->streams[j];
2657                 if (st != ost->st && st->codec->codec_type == enc_ctx->codec_type)
2658                     break;
2659             }
2660             if (j == oc->nb_streams)
2661                 if (enc_ctx->codec_type == AVMEDIA_TYPE_AUDIO || enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO)
2662                     ost->st->disposition = AV_DISPOSITION_DEFAULT;
2663         }
2664
2665         if (ost->stream_copy) {
2666             AVRational sar;
2667             uint64_t extra_size;
2668
2669             av_assert0(ist && !ost->filter);
2670
2671             extra_size = (uint64_t)dec_ctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2672
2673             if (extra_size > INT_MAX) {
2674                 return AVERROR(EINVAL);
2675             }
2676
2677             /* if stream_copy is selected, no need to decode or encode */
2678             enc_ctx->codec_id   = dec_ctx->codec_id;
2679             enc_ctx->codec_type = dec_ctx->codec_type;
2680
2681             if (!enc_ctx->codec_tag) {
2682                 unsigned int codec_tag;
2683                 if (!oc->oformat->codec_tag ||
2684                      av_codec_get_id (oc->oformat->codec_tag, dec_ctx->codec_tag) == enc_ctx->codec_id ||
2685                      !av_codec_get_tag2(oc->oformat->codec_tag, dec_ctx->codec_id, &codec_tag))
2686                     enc_ctx->codec_tag = dec_ctx->codec_tag;
2687             }
2688
2689             enc_ctx->bit_rate       = dec_ctx->bit_rate;
2690             enc_ctx->rc_max_rate    = dec_ctx->rc_max_rate;
2691             enc_ctx->rc_buffer_size = dec_ctx->rc_buffer_size;
2692             enc_ctx->field_order    = dec_ctx->field_order;
2693             if (dec_ctx->extradata_size) {
2694                 enc_ctx->extradata      = av_mallocz(extra_size);
2695                 if (!enc_ctx->extradata) {
2696                     return AVERROR(ENOMEM);
2697                 }
2698                 memcpy(enc_ctx->extradata, dec_ctx->extradata, dec_ctx->extradata_size);
2699             }
2700             enc_ctx->extradata_size= dec_ctx->extradata_size;
2701             enc_ctx->bits_per_coded_sample  = dec_ctx->bits_per_coded_sample;
2702
2703             enc_ctx->time_base = ist->st->time_base;
2704             /*
2705              * Avi is a special case here because it supports variable fps but
2706              * having the fps and timebase differe significantly adds quite some
2707              * overhead
2708              */
2709             if(!strcmp(oc->oformat->name, "avi")) {
2710                 if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
2711                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
2712                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(dec_ctx->time_base)
2713                                && av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(dec_ctx->time_base) < 1.0/500
2714                      || copy_tb==2){
2715                     enc_ctx->time_base.num = ist->st->r_frame_rate.den;
2716                     enc_ctx->time_base.den = 2*ist->st->r_frame_rate.num;
2717                     enc_ctx->ticks_per_frame = 2;
2718                 } else if (   copy_tb<0 && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2719                                  && av_q2d(ist->st->time_base) < 1.0/500
2720                     || copy_tb==0){
2721                     enc_ctx->time_base = dec_ctx->time_base;
2722                     enc_ctx->time_base.num *= dec_ctx->ticks_per_frame;
2723                     enc_ctx->time_base.den *= 2;
2724                     enc_ctx->ticks_per_frame = 2;
2725                 }
2726             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2727                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2728                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2729                       && strcmp(oc->oformat->name, "f4v")
2730             ) {
2731                 if(   copy_tb<0 && dec_ctx->time_base.den
2732                                 && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > av_q2d(ist->st->time_base)
2733                                 && av_q2d(ist->st->time_base) < 1.0/500
2734                    || copy_tb==0){
2735                     enc_ctx->time_base = dec_ctx->time_base;
2736                     enc_ctx->time_base.num *= dec_ctx->ticks_per_frame;
2737                 }
2738             }
2739             if (   enc_ctx->codec_tag == AV_RL32("tmcd")
2740                 && dec_ctx->time_base.num < dec_ctx->time_base.den
2741                 && dec_ctx->time_base.num > 0
2742                 && 121LL*dec_ctx->time_base.num > dec_ctx->time_base.den) {
2743                 enc_ctx->time_base = dec_ctx->time_base;
2744             }
2745
2746             if (ist && !ost->frame_rate.num)
2747                 ost->frame_rate = ist->framerate;
2748             if(ost->frame_rate.num)
2749                 enc_ctx->time_base = av_inv_q(ost->frame_rate);
2750
2751             av_reduce(&enc_ctx->time_base.num, &enc_ctx->time_base.den,
2752                         enc_ctx->time_base.num, enc_ctx->time_base.den, INT_MAX);
2753
2754             if (ist->st->nb_side_data) {
2755                 ost->st->side_data = av_realloc_array(NULL, ist->st->nb_side_data,
2756                                                       sizeof(*ist->st->side_data));
2757                 if (!ost->st->side_data)
2758                     return AVERROR(ENOMEM);
2759
2760                 for (j = 0; j < ist->st->nb_side_data; j++) {
2761                     const AVPacketSideData *sd_src = &ist->st->side_data[j];
2762                     AVPacketSideData *sd_dst = &ost->st->side_data[j];
2763
2764                     sd_dst->data = av_malloc(sd_src->size);
2765                     if (!sd_dst->data)
2766                         return AVERROR(ENOMEM);
2767                     memcpy(sd_dst->data, sd_src->data, sd_src->size);
2768                     sd_dst->size = sd_src->size;
2769                     sd_dst->type = sd_src->type;
2770                     ost->st->nb_side_data++;
2771                 }
2772             }
2773
2774             ost->parser = av_parser_init(enc_ctx->codec_id);
2775
2776             switch (enc_ctx->codec_type) {
2777             case AVMEDIA_TYPE_AUDIO:
2778                 if (audio_volume != 256) {
2779                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2780                     exit_program(1);
2781                 }
2782                 enc_ctx->channel_layout     = dec_ctx->channel_layout;
2783                 enc_ctx->sample_rate        = dec_ctx->sample_rate;
2784                 enc_ctx->channels           = dec_ctx->channels;
2785                 enc_ctx->frame_size         = dec_ctx->frame_size;
2786                 enc_ctx->audio_service_type = dec_ctx->audio_service_type;
2787                 enc_ctx->block_align        = dec_ctx->block_align;
2788                 enc_ctx->initial_padding    = dec_ctx->delay;
2789 #if FF_API_AUDIOENC_DELAY
2790                 enc_ctx->delay              = dec_ctx->delay;
2791 #endif
2792                 if((enc_ctx->block_align == 1 || enc_ctx->block_align == 1152 || enc_ctx->block_align == 576) && enc_ctx->codec_id == AV_CODEC_ID_MP3)
2793                     enc_ctx->block_align= 0;
2794                 if(enc_ctx->codec_id == AV_CODEC_ID_AC3)
2795                     enc_ctx->block_align= 0;
2796                 break;
2797             case AVMEDIA_TYPE_VIDEO:
2798                 enc_ctx->pix_fmt            = dec_ctx->pix_fmt;
2799                 enc_ctx->width              = dec_ctx->width;
2800                 enc_ctx->height             = dec_ctx->height;
2801                 enc_ctx->has_b_frames       = dec_ctx->has_b_frames;
2802                 if (ost->frame_aspect_ratio.num) { // overridden by the -aspect cli option
2803                     sar =
2804                         av_mul_q(ost->frame_aspect_ratio,
2805                                  (AVRational){ enc_ctx->height, enc_ctx->width });
2806                     av_log(NULL, AV_LOG_WARNING, "Overriding aspect ratio "
2807                            "with stream copy may produce invalid files\n");
2808                 }
2809                 else if (ist->st->sample_aspect_ratio.num)
2810                     sar = ist->st->sample_aspect_ratio;
2811                 else
2812                     sar = dec_ctx->sample_aspect_ratio;
2813                 ost->st->sample_aspect_ratio = enc_ctx->sample_aspect_ratio = sar;
2814                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2815                 ost->st->r_frame_rate = ist->st->r_frame_rate;
2816                 break;
2817             case AVMEDIA_TYPE_SUBTITLE:
2818                 enc_ctx->width  = dec_ctx->width;
2819                 enc_ctx->height = dec_ctx->height;
2820                 break;
2821             case AVMEDIA_TYPE_DATA:
2822             case AVMEDIA_TYPE_ATTACHMENT:
2823                 break;
2824             default:
2825                 abort();
2826             }
2827         } else {
2828             if (!ost->enc)
2829                 ost->enc = avcodec_find_encoder(enc_ctx->codec_id);
2830             if (!ost->enc) {
2831                 /* should only happen when a default codec is not present. */
2832                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
2833                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
2834                 ret = AVERROR(EINVAL);
2835                 goto dump_format;
2836             }
2837
2838             if (ist)
2839                 ist->decoding_needed |= DECODING_FOR_OST;
2840             ost->encoding_needed = 1;
2841
2842             set_encoder_id(output_files[ost->file_index], ost);
2843
2844             if (!ost->filter &&
2845                 (enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO ||
2846                  enc_ctx->codec_type == AVMEDIA_TYPE_AUDIO)) {
2847                     FilterGraph *fg;
2848                     fg = init_simple_filtergraph(ist, ost);
2849                     if (configure_filtergraph(fg)) {
2850                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2851                         exit_program(1);
2852                     }
2853             }
2854
2855             if (enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
2856                 if (!ost->frame_rate.num)
2857                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
2858                 if (ist && !ost->frame_rate.num)
2859                     ost->frame_rate = ist->framerate;
2860                 if (ist && !ost->frame_rate.num)
2861                     ost->frame_rate = ist->st->r_frame_rate;
2862                 if (ist && !ost->frame_rate.num) {
2863                     ost->frame_rate = (AVRational){25, 1};
2864                     av_log(NULL, AV_LOG_WARNING,
2865                            "No information "
2866                            "about the input framerate is available. Falling "
2867                            "back to a default value of 25fps for output stream #%d:%d. Use the -r option "
2868                            "if you want a different framerate.\n",
2869                            ost->file_index, ost->index);
2870                 }
2871 //                    ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
2872                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2873                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2874                     ost->frame_rate = ost->enc->supported_framerates[idx];
2875                 }
2876                 // reduce frame rate for mpeg4 to be within the spec limits
2877                 if (enc_ctx->codec_id == AV_CODEC_ID_MPEG4) {
2878                     av_reduce(&ost->frame_rate.num, &ost->frame_rate.den,
2879                               ost->frame_rate.num, ost->frame_rate.den, 65535);
2880                 }
2881             }
2882
2883             switch (enc_ctx->codec_type) {
2884             case AVMEDIA_TYPE_AUDIO:
2885                 enc_ctx->sample_fmt     = ost->filter->filter->inputs[0]->format;
2886                 enc_ctx->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2887                 enc_ctx->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2888                 enc_ctx->channels       = avfilter_link_get_channels(ost->filter->filter->inputs[0]);
2889                 enc_ctx->time_base      = (AVRational){ 1, enc_ctx->sample_rate };
2890                 break;
2891             case AVMEDIA_TYPE_VIDEO:
2892                 enc_ctx->time_base = av_inv_q(ost->frame_rate);
2893                 if (!(enc_ctx->time_base.num && enc_ctx->time_base.den))
2894                     enc_ctx->time_base = ost->filter->filter->inputs[0]->time_base;
2895                 if (   av_q2d(enc_ctx->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
2896                    && (video_sync_method == VSYNC_CFR || video_sync_method == VSYNC_VSCFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
2897                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
2898                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
2899                 }
2900                 for (j = 0; j < ost->forced_kf_count; j++)
2901                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
2902                                                          AV_TIME_BASE_Q,
2903                                                          enc_ctx->time_base);
2904
2905                 enc_ctx->width  = ost->filter->filter->inputs[0]->w;
2906                 enc_ctx->height = ost->filter->filter->inputs[0]->h;
2907                 enc_ctx->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2908                     ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option
2909                     av_mul_q(ost->frame_aspect_ratio, (AVRational){ enc_ctx->height, enc_ctx->width }) :
2910                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2911                 if (!strncmp(ost->enc->name, "libx264", 7) &&
2912                     enc_ctx->pix_fmt == AV_PIX_FMT_NONE &&
2913                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2914                     av_log(NULL, AV_LOG_WARNING,
2915                            "No pixel format specified, %s for H.264 encoding chosen.\n"
2916                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2917                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2918                 if (!strncmp(ost->enc->name, "mpeg2video", 10) &&
2919                     enc_ctx->pix_fmt == AV_PIX_FMT_NONE &&
2920                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2921                     av_log(NULL, AV_LOG_WARNING,
2922                            "No pixel format specified, %s for MPEG-2 encoding chosen.\n"
2923                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2924                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2925                 enc_ctx->pix_fmt = ost->filter->filter->inputs[0]->format;
2926
2927                 ost->st->avg_frame_rate = ost->frame_rate;
2928
2929                 if (!dec_ctx ||
2930                     enc_ctx->width   != dec_ctx->width  ||
2931                     enc_ctx->height  != dec_ctx->height ||
2932                     enc_ctx->pix_fmt != dec_ctx->pix_fmt) {
2933                     enc_ctx->bits_per_raw_sample = frame_bits_per_raw_sample;
2934                 }
2935
2936                 if (ost->forced_keyframes) {
2937                     if (!strncmp(ost->forced_keyframes, "expr:", 5)) {
2938                         ret = av_expr_parse(&ost->forced_keyframes_pexpr, ost->forced_keyframes+5,
2939                                             forced_keyframes_const_names, NULL, NULL, NULL, NULL, 0, NULL);
2940                         if (ret < 0) {
2941                             av_log(NULL, AV_LOG_ERROR,
2942                                    "Invalid force_key_frames expression '%s'\n", ost->forced_keyframes+5);
2943                             return ret;
2944                         }
2945                         ost->forced_keyframes_expr_const_values[FKF_N] = 0;
2946                         ost->forced_keyframes_expr_const_values[FKF_N_FORCED] = 0;
2947                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] = NAN;
2948                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] = NAN;
2949
2950                         // Don't parse the 'forced_keyframes' in case of 'keep-source-keyframes',
2951                         // parse it only for static kf timings
2952                     } else if(strncmp(ost->forced_keyframes, "source", 6)) {
2953                         parse_forced_key_frames(ost->forced_keyframes, ost, ost->enc_ctx);
2954                     }
2955                 }
2956                 break;
2957             case AVMEDIA_TYPE_SUBTITLE:
2958                 enc_ctx->time_base = (AVRational){1, 1000};
2959                 if (!enc_ctx->width) {
2960                     enc_ctx->width     = input_streams[ost->source_index]->st->codec->width;
2961                     enc_ctx->height    = input_streams[ost->source_index]->st->codec->height;
2962                 }
2963                 break;
2964             case AVMEDIA_TYPE_DATA:
2965                 break;
2966             default:
2967                 abort();
2968                 break;
2969             }
2970             /* two pass mode */
2971             if (enc_ctx->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
2972                 char logfilename[1024];
2973                 FILE *f;
2974
2975                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2976                          ost->logfile_prefix ? ost->logfile_prefix :
2977                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
2978                          i);
2979                 if (!strcmp(ost->enc->name, "libx264")) {
2980                     av_dict_set(&ost->encoder_opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2981                 } else {
2982                     if (enc_ctx->flags & CODEC_FLAG_PASS2) {
2983                         char  *logbuffer;
2984                         size_t logbuffer_size;
2985                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2986                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2987                                    logfilename);
2988                             exit_program(1);
2989                         }
2990                         enc_ctx->stats_in = logbuffer;
2991                     }
2992                     if (enc_ctx->flags & CODEC_FLAG_PASS1) {
2993                         f = av_fopen_utf8(logfilename, "wb");
2994                         if (!f) {
2995                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2996                                 logfilename, strerror(errno));
2997                             exit_program(1);
2998                         }
2999                         ost->logfile = f;
3000                     }
3001                 }
3002             }
3003         }
3004
3005         if (ost->disposition) {
3006             static const AVOption opts[] = {
3007                 { "disposition"         , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
3008                 { "default"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DEFAULT           },    .unit = "flags" },
3009                 { "dub"                 , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DUB               },    .unit = "flags" },
3010                 { "original"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_ORIGINAL          },    .unit = "flags" },
3011                 { "comment"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_COMMENT           },    .unit = "flags" },
3012                 { "lyrics"              , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_LYRICS            },    .unit = "flags" },
3013                 { "karaoke"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_KARAOKE           },    .unit = "flags" },
3014                 { "forced"              , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_FORCED            },    .unit = "flags" },
3015                 { "hearing_impaired"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_HEARING_IMPAIRED  },    .unit = "flags" },
3016                 { "visual_impaired"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_VISUAL_IMPAIRED   },    .unit = "flags" },
3017                 { "clean_effects"       , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CLEAN_EFFECTS     },    .unit = "flags" },
3018                 { "captions"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CAPTIONS          },    .unit = "flags" },
3019                 { "descriptions"        , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DESCRIPTIONS      },    .unit = "flags" },
3020                 { "metadata"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_METADATA          },    .unit = "flags" },
3021                 { NULL },
3022             };
3023             static const AVClass class = {
3024                 .class_name = "",
3025                 .item_name  = av_default_item_name,
3026                 .option     = opts,
3027                 .version    = LIBAVUTIL_VERSION_INT,
3028             };
3029             const AVClass *pclass = &class;
3030
3031             ret = av_opt_eval_flags(&pclass, &opts[0], ost->disposition, &ost->st->disposition);
3032             if (ret < 0)
3033                 goto dump_format;
3034         }
3035     }
3036
3037     /* open each encoder */
3038     for (i = 0; i < nb_output_streams; i++) {
3039         ost = output_streams[i];
3040         if (ost->encoding_needed) {
3041             AVCodec      *codec = ost->enc;
3042             AVCodecContext *dec = NULL;
3043
3044             if ((ist = get_input_stream(ost)))
3045                 dec = ist->dec_ctx;
3046             if (dec && dec->subtitle_header) {
3047                 /* ASS code assumes this buffer is null terminated so add extra byte. */
3048                 ost->enc_ctx->subtitle_header = av_mallocz(dec->subtitle_header_size + 1);
3049                 if (!ost->enc_ctx->subtitle_header) {
3050                     ret = AVERROR(ENOMEM);
3051                     goto dump_format;
3052                 }
3053                 memcpy(ost->enc_ctx->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
3054                 ost->enc_ctx->subtitle_header_size = dec->subtitle_header_size;
3055             }
3056             if (!av_dict_get(ost->encoder_opts, "threads", NULL, 0))
3057                 av_dict_set(&ost->encoder_opts, "threads", "auto", 0);
3058             av_dict_set(&ost->encoder_opts, "side_data_only_packets", "1", 0);
3059
3060             if ((ret = avcodec_open2(ost->enc_ctx, codec, &ost->encoder_opts)) < 0) {
3061                 if (ret == AVERROR_EXPERIMENTAL)
3062                     abort_codec_experimental(codec, 1);
3063                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
3064                         ost->file_index, ost->index);
3065                 goto dump_format;
3066             }
3067             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
3068                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
3069                 av_buffersink_set_frame_size(ost->filter->filter,
3070                                              ost->enc_ctx->frame_size);
3071             assert_avoptions(ost->encoder_opts);
3072             if (ost->enc_ctx->bit_rate && ost->enc_ctx->bit_rate < 1000)
3073                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
3074                                              " It takes bits/s as argument, not kbits/s\n");
3075
3076             ret = avcodec_copy_context(ost->st->codec, ost->enc_ctx);
3077             if (ret < 0) {
3078                 av_log(NULL, AV_LOG_FATAL,
3079                        "Error initializing the output stream codec context.\n");
3080                 exit_program(1);
3081             }
3082
3083             // copy timebase while removing common factors
3084             ost->st->time_base = av_add_q(ost->enc_ctx->time_base, (AVRational){0, 1});
3085             ost->st->codec->codec= ost->enc_ctx->codec;
3086         } else {
3087             ret = av_opt_set_dict(ost->enc_ctx, &ost->encoder_opts);
3088             if (ret < 0) {
3089                 av_log(NULL, AV_LOG_FATAL,
3090                     "Error setting up codec context options.\n");
3091                 return ret;
3092             }
3093             // copy timebase while removing common factors
3094             ost->st->time_base = av_add_q(ost->st->codec->time_base, (AVRational){0, 1});
3095         }
3096     }
3097
3098     /* init input streams */
3099     for (i = 0; i < nb_input_streams; i++)
3100         if ((ret = init_input_stream(i, error, sizeof(error))) < 0) {
3101             for (i = 0; i < nb_output_streams; i++) {
3102                 ost = output_streams[i];
3103                 avcodec_close(ost->enc_ctx);
3104             }
3105             goto dump_format;
3106         }
3107
3108     /* discard unused programs */
3109     for (i = 0; i < nb_input_files; i++) {
3110         InputFile *ifile = input_files[i];
3111         for (j = 0; j < ifile->ctx->nb_programs; j++) {
3112             AVProgram *p = ifile->ctx->programs[j];
3113             int discard  = AVDISCARD_ALL;
3114
3115             for (k = 0; k < p->nb_stream_indexes; k++)
3116                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
3117                     discard = AVDISCARD_DEFAULT;
3118                     break;
3119                 }
3120             p->discard = discard;
3121         }
3122     }
3123
3124     /* open files and write file headers */
3125     for (i = 0; i < nb_output_files; i++) {
3126         oc = output_files[i]->ctx;
3127         oc->interrupt_callback = int_cb;
3128         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
3129             snprintf(error, sizeof(error),
3130                      "Could not write header for output file #%d "
3131                      "(incorrect codec parameters ?): %s",
3132                      i, av_err2str(ret));
3133             ret = AVERROR(EINVAL);
3134             goto dump_format;
3135         }
3136 //         assert_avoptions(output_files[i]->opts);
3137         if (strcmp(oc->oformat->name, "rtp")) {
3138             want_sdp = 0;
3139         }
3140     }
3141
3142  dump_format:
3143     /* dump the file output parameters - cannot be done before in case
3144        of stream copy */
3145     for (i = 0; i < nb_output_files; i++) {
3146         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
3147     }
3148
3149     /* dump the stream mapping */
3150     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
3151     for (i = 0; i < nb_input_streams; i++) {
3152         ist = input_streams[i];
3153
3154         for (j = 0; j < ist->nb_filters; j++) {
3155             if (ist->filters[j]->graph->graph_desc) {
3156                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
3157                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
3158                        ist->filters[j]->name);
3159                 if (nb_filtergraphs > 1)
3160                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
3161                 av_log(NULL, AV_LOG_INFO, "\n");
3162             }
3163         }
3164     }
3165
3166     for (i = 0; i < nb_output_streams; i++) {
3167         ost = output_streams[i];
3168
3169         if (ost->attachment_filename) {
3170             /* an attached file */
3171             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
3172                    ost->attachment_filename, ost->file_index, ost->index);
3173             continue;
3174         }
3175
3176         if (ost->filter && ost->filter->graph->graph_desc) {
3177             /* output from a complex graph */
3178             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
3179             if (nb_filtergraphs > 1)
3180                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
3181
3182             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
3183                    ost->index, ost->enc ? ost->enc->name : "?");
3184             continue;
3185         }
3186
3187         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
3188                input_streams[ost->source_index]->file_index,
3189                input_streams[ost->source_index]->st->index,
3190                ost->file_index,
3191                ost->index);
3192         if (ost->sync_ist != input_streams[ost->source_index])
3193             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
3194                    ost->sync_ist->file_index,
3195                    ost->sync_ist->st->index);
3196         if (ost->stream_copy)
3197             av_log(NULL, AV_LOG_INFO, " (copy)");
3198         else {
3199             const AVCodec *in_codec    = input_streams[ost->source_index]->dec;
3200             const AVCodec *out_codec   = ost->enc;
3201             const char *decoder_name   = "?";
3202             const char *in_codec_name  = "?";
3203             const char *encoder_name   = "?";
3204             const char *out_codec_name = "?";
3205             const AVCodecDescriptor *desc;
3206
3207             if (in_codec) {
3208                 decoder_name  = in_codec->name;
3209                 desc = avcodec_descriptor_get(in_codec->id);
3210                 if (desc)
3211                     in_codec_name = desc->name;
3212                 if (!strcmp(decoder_name, in_codec_name))
3213                     decoder_name = "native";
3214             }
3215
3216             if (out_codec) {
3217                 encoder_name   = out_codec->name;
3218                 desc = avcodec_descriptor_get(out_codec->id);
3219                 if (desc)
3220                     out_codec_name = desc->name;
3221                 if (!strcmp(encoder_name, out_codec_name))
3222                     encoder_name = "native";
3223             }
3224
3225             av_log(NULL, AV_LOG_INFO, " (%s (%s) -> %s (%s))",
3226                    in_codec_name, decoder_name,
3227                    out_codec_name, encoder_name);
3228         }
3229         av_log(NULL, AV_LOG_INFO, "\n");
3230     }
3231
3232     if (ret) {
3233         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
3234         return ret;
3235     }
3236
3237     if (sdp_filename || want_sdp) {
3238         print_sdp();
3239     }
3240
3241     transcode_init_done = 1;
3242
3243     return 0;
3244 }
3245
3246 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
3247 static int need_output(void)
3248 {
3249     int i;
3250
3251     for (i = 0; i < nb_output_streams; i++) {
3252         OutputStream *ost    = output_streams[i];
3253         OutputFile *of       = output_files[ost->file_index];
3254         AVFormatContext *os  = output_files[ost->file_index]->ctx;
3255
3256         if (ost->finished ||
3257             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3258             continue;
3259         if (ost->frame_number >= ost->max_frames) {
3260             int j;
3261             for (j = 0; j < of->ctx->nb_streams; j++)
3262                 close_output_stream(output_streams[of->ost_index + j]);
3263             continue;
3264         }
3265
3266         return 1;
3267     }
3268
3269     return 0;
3270 }
3271
3272 /**
3273  * Select the output stream to process.
3274  *
3275  * @return  selected output stream, or NULL if none available
3276  */
3277 static OutputStream *choose_output(void)
3278 {
3279     int i;
3280     int64_t opts_min = INT64_MAX;
3281     OutputStream *ost_min = NULL;
3282
3283     for (i = 0; i < nb_output_streams; i++) {
3284         OutputStream *ost = output_streams[i];
3285         int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
3286                                     AV_TIME_BASE_Q);
3287         if (!ost->finished && opts < opts_min) {
3288             opts_min = opts;
3289             ost_min  = ost->unavailable ? NULL : ost;
3290         }
3291     }
3292     return ost_min;
3293 }
3294
3295 static int check_keyboard_interaction(int64_t cur_time)
3296 {
3297     int i, ret, key;
3298     static int64_t last_time;
3299     if (received_nb_signals)
3300         return AVERROR_EXIT;
3301     /* read_key() returns 0 on EOF */
3302     if(cur_time - last_time >= 100000 && !run_as_daemon){
3303         key =  read_key();
3304         last_time = cur_time;
3305     }else
3306         key = -1;
3307     if (key == 'q')
3308         return AVERROR_EXIT;
3309     if (key == '+') av_log_set_level(av_log_get_level()+10);
3310     if (key == '-') av_log_set_level(av_log_get_level()-10);
3311     if (key == 's') qp_hist     ^= 1;
3312     if (key == 'h'){
3313         if (do_hex_dump){
3314             do_hex_dump = do_pkt_dump = 0;
3315         } else if(do_pkt_dump){
3316             do_hex_dump = 1;
3317         } else
3318             do_pkt_dump = 1;
3319         av_log_set_level(AV_LOG_DEBUG);
3320     }
3321     if (key == 'c' || key == 'C'){
3322         char buf[4096], target[64], command[256], arg[256] = {0};
3323         double time;
3324         int k, n = 0;
3325         fprintf(stderr, "\nEnter command: <target>|all <time>|-1 <command>[ <argument>]\n");
3326         i = 0;
3327         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3328             if (k > 0)
3329                 buf[i++] = k;
3330         buf[i] = 0;
3331         if (k > 0 &&
3332             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
3333             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
3334                    target, time, command, arg);
3335             for (i = 0; i < nb_filtergraphs; i++) {
3336                 FilterGraph *fg = filtergraphs[i];
3337                 if (fg->graph) {
3338                     if (time < 0) {
3339                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
3340                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
3341                         fprintf(stderr, "Command reply for stream %d: ret:%d res:\n%s", i, ret, buf);
3342                     } else if (key == 'c') {
3343                         fprintf(stderr, "Queing commands only on filters supporting the specific command is unsupported\n");
3344                         ret = AVERROR_PATCHWELCOME;
3345                     } else {
3346                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
3347                         if (ret < 0)
3348                             fprintf(stderr, "Queing command failed with error %s\n", av_err2str(ret));
3349                     }
3350                 }
3351             }
3352         } else {
3353             av_log(NULL, AV_LOG_ERROR,
3354                    "Parse error, at least 3 arguments were expected, "
3355                    "only %d given in string '%s'\n", n, buf);
3356         }
3357     }
3358     if (key == 'd' || key == 'D'){
3359         int debug=0;
3360         if(key == 'D') {
3361             debug = input_streams[0]->st->codec->debug<<1;
3362             if(!debug) debug = 1;
3363             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
3364                 debug += debug;
3365         }else
3366             if(scanf("%d", &debug)!=1)
3367                 fprintf(stderr,"error parsing debug value\n");
3368         for(i=0;i<nb_input_streams;i++) {
3369             input_streams[i]->st->codec->debug = debug;
3370         }
3371         for(i=0;i<nb_output_streams;i++) {
3372             OutputStream *ost = output_streams[i];
3373             ost->enc_ctx->debug = debug;
3374         }
3375         if(debug) av_log_set_level(AV_LOG_DEBUG);
3376         fprintf(stderr,"debug=%d\n", debug);
3377     }
3378     if (key == '?'){
3379         fprintf(stderr, "key    function\n"
3380                         "?      show this help\n"
3381                         "+      increase verbosity\n"
3382                         "-      decrease verbosity\n"
3383                         "c      Send command to first matching filter supporting it\n"
3384                         "C      Send/Que command to all matching filters\n"
3385                         "D      cycle through available debug modes\n"
3386                         "h      dump packets/hex press to cycle through the 3 states\n"
3387                         "q      quit\n"
3388                         "s      Show QP histogram\n"
3389         );
3390     }
3391     return 0;
3392 }
3393
3394 #if HAVE_PTHREADS
3395 static void *input_thread(void *arg)
3396 {
3397     InputFile *f = arg;
3398     unsigned flags = f->non_blocking ? AV_THREAD_MESSAGE_NONBLOCK : 0;
3399     int ret = 0;
3400
3401     while (1) {
3402         AVPacket pkt;
3403         ret = av_read_frame(f->ctx, &pkt);
3404
3405         if (ret == AVERROR(EAGAIN)) {
3406             av_usleep(10000);
3407             continue;
3408         }
3409         if (ret < 0) {
3410             av_thread_message_queue_set_err_recv(f->in_thread_queue, ret);
3411             break;
3412         }
3413         av_dup_packet(&pkt);
3414         ret = av_thread_message_queue_send(f->in_thread_queue, &pkt, flags);
3415         if (flags && ret == AVERROR(EAGAIN)) {
3416             flags = 0;
3417             ret = av_thread_message_queue_send(f->in_thread_queue, &pkt, flags);
3418             av_log(f->ctx, AV_LOG_WARNING,
3419                    "Thread message queue blocking; consider raising the "
3420                    "thread_queue_size option (current value: %d)\n",
3421                    f->thread_queue_size);
3422         }
3423         if (ret < 0) {
3424             if (ret != AVERROR_EOF)
3425                 av_log(f->ctx, AV_LOG_ERROR,
3426                        "Unable to send packet to main thread: %s\n",
3427                        av_err2str(ret));
3428             av_free_packet(&pkt);
3429             av_thread_message_queue_set_err_recv(f->in_thread_queue, ret);
3430             break;
3431         }
3432     }
3433
3434     return NULL;
3435 }
3436
3437 static void free_input_threads(void)
3438 {
3439     int i;
3440
3441     for (i = 0; i < nb_input_files; i++) {
3442         InputFile *f = input_files[i];
3443         AVPacket pkt;
3444
3445         if (!f->in_thread_queue)
3446             continue;
3447         av_thread_message_queue_set_err_send(f->in_thread_queue, AVERROR_EOF);
3448         while (av_thread_message_queue_recv(f->in_thread_queue, &pkt, 0) >= 0)
3449             av_free_packet(&pkt);
3450
3451         pthread_join(f->thread, NULL);
3452         f->joined = 1;
3453         av_thread_message_queue_free(&f->in_thread_queue);
3454     }
3455 }
3456
3457 static int init_input_threads(void)
3458 {
3459     int i, ret;
3460
3461     if (nb_input_files == 1)
3462         return 0;
3463
3464     for (i = 0; i < nb_input_files; i++) {
3465         InputFile *f = input_files[i];
3466
3467         if (f->ctx->pb ? !f->ctx->pb->seekable :
3468             strcmp(f->ctx->iformat->name, "lavfi"))
3469             f->non_blocking = 1;
3470         ret = av_thread_message_queue_alloc(&f->in_thread_queue,
3471                                             f->thread_queue_size, sizeof(AVPacket));
3472         if (ret < 0)
3473             return ret;
3474
3475         if ((ret = pthread_create(&f->thread, NULL, input_thread, f))) {
3476             av_log(NULL, AV_LOG_ERROR, "pthread_create failed: %s. Try to increase `ulimit -v` or decrease `ulimit -s`.\n", strerror(ret));
3477             av_thread_message_queue_free(&f->in_thread_queue);
3478             return AVERROR(ret);
3479         }
3480     }
3481     return 0;
3482 }
3483
3484 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
3485 {
3486     return av_thread_message_queue_recv(f->in_thread_queue, pkt,
3487                                         f->non_blocking ?
3488                                         AV_THREAD_MESSAGE_NONBLOCK : 0);
3489 }
3490 #endif
3491
3492 static int get_input_packet(InputFile *f, AVPacket *pkt)
3493 {
3494     if (f->rate_emu) {
3495         int i;
3496         for (i = 0; i < f->nb_streams; i++) {
3497             InputStream *ist = input_streams[f->ist_index + i];
3498             int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
3499             int64_t now = av_gettime_relative() - ist->start;
3500             if (pts > now)
3501                 return AVERROR(EAGAIN);
3502         }
3503     }
3504
3505 #if HAVE_PTHREADS
3506     if (nb_input_files > 1)
3507         return get_input_packet_mt(f, pkt);
3508 #endif
3509     return av_read_frame(f->ctx, pkt);
3510 }
3511
3512 static int got_eagain(void)
3513 {
3514     int i;
3515     for (i = 0; i < nb_output_streams; i++)
3516         if (output_streams[i]->unavailable)
3517             return 1;
3518     return 0;
3519 }
3520
3521 static void reset_eagain(void)
3522 {
3523     int i;
3524     for (i = 0; i < nb_input_files; i++)
3525         input_files[i]->eagain = 0;
3526     for (i = 0; i < nb_output_streams; i++)
3527         output_streams[i]->unavailable = 0;
3528 }
3529
3530 /*
3531  * Return
3532  * - 0 -- one packet was read and processed
3533  * - AVERROR(EAGAIN) -- no packets were available for selected file,
3534  *   this function should be called again
3535  * - AVERROR_EOF -- this function should not be called again
3536  */
3537 static int process_input(int file_index)
3538 {
3539     InputFile *ifile = input_files[file_index];
3540     AVFormatContext *is;
3541     InputStream *ist;
3542     AVPacket pkt;
3543     int ret, i, j;
3544
3545     is  = ifile->ctx;
3546     ret = get_input_packet(ifile, &pkt);
3547
3548     if (ret == AVERROR(EAGAIN)) {
3549         ifile->eagain = 1;
3550         return ret;
3551     }
3552     if (ret < 0) {
3553         if (ret != AVERROR_EOF) {
3554             print_error(is->filename, ret);
3555             if (exit_on_error)
3556                 exit_program(1);
3557         }
3558
3559         for (i = 0; i < ifile->nb_streams; i++) {
3560             ist = input_streams[ifile->ist_index + i];
3561             if (ist->decoding_needed) {
3562                 ret = process_input_packet(ist, NULL);
3563                 if (ret>0)
3564                     return 0;
3565             }
3566
3567             /* mark all outputs that don't go through lavfi as finished */
3568             for (j = 0; j < nb_output_streams; j++) {
3569                 OutputStream *ost = output_streams[j];
3570
3571                 if (ost->source_index == ifile->ist_index + i &&
3572                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
3573                     finish_output_stream(ost);
3574             }
3575         }
3576
3577         ifile->eof_reached = 1;
3578         return AVERROR(EAGAIN);
3579     }
3580
3581     reset_eagain();
3582
3583     if (do_pkt_dump) {
3584         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3585                          is->streams[pkt.stream_index]);
3586     }
3587     /* the following test is needed in case new streams appear
3588        dynamically in stream : we ignore them */
3589     if (pkt.stream_index >= ifile->nb_streams) {
3590         report_new_stream(file_index, &pkt);
3591         goto discard_packet;
3592     }
3593
3594     ist = input_streams[ifile->ist_index + pkt.stream_index];
3595
3596     ist->data_size += pkt.size;
3597     ist->nb_packets++;
3598
3599     if (ist->discard)
3600         goto discard_packet;
3601
3602     if (debug_ts) {
3603         av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
3604                "next_dts:%s next_dts_time:%s next_pts:%s next_pts_time:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%s off_time:%s\n",
3605                ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->dec_ctx->codec_type),
3606                av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &AV_TIME_BASE_Q),
3607    &