ffmpeg: fix segfault with random output
[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 #if HAVE_ISATTY
34 #if HAVE_IO_H
35 #include <io.h>
36 #endif
37 #if HAVE_UNISTD_H
38 #include <unistd.h>
39 #endif
40 #endif
41 #include "libavformat/avformat.h"
42 #include "libavdevice/avdevice.h"
43 #include "libswscale/swscale.h"
44 #include "libswresample/swresample.h"
45 #include "libavutil/opt.h"
46 #include "libavutil/channel_layout.h"
47 #include "libavutil/parseutils.h"
48 #include "libavutil/samplefmt.h"
49 #include "libavutil/colorspace.h"
50 #include "libavutil/fifo.h"
51 #include "libavutil/intreadwrite.h"
52 #include "libavutil/dict.h"
53 #include "libavutil/mathematics.h"
54 #include "libavutil/pixdesc.h"
55 #include "libavutil/avstring.h"
56 #include "libavutil/libm.h"
57 #include "libavutil/imgutils.h"
58 #include "libavutil/timestamp.h"
59 #include "libavutil/bprint.h"
60 #include "libavutil/time.h"
61 #include "libavformat/os_support.h"
62
63 #include "libavformat/ffm.h" // not public API
64
65 # include "libavfilter/avcodec.h"
66 # include "libavfilter/avfilter.h"
67 # include "libavfilter/buffersrc.h"
68 # include "libavfilter/buffersink.h"
69
70 #if HAVE_SYS_RESOURCE_H
71 #include <sys/time.h>
72 #include <sys/types.h>
73 #include <sys/resource.h>
74 #elif HAVE_GETPROCESSTIMES
75 #include <windows.h>
76 #endif
77 #if HAVE_GETPROCESSMEMORYINFO
78 #include <windows.h>
79 #include <psapi.h>
80 #endif
81
82 #if HAVE_SYS_SELECT_H
83 #include <sys/select.h>
84 #endif
85
86 #if HAVE_TERMIOS_H
87 #include <fcntl.h>
88 #include <sys/ioctl.h>
89 #include <sys/time.h>
90 #include <termios.h>
91 #elif HAVE_KBHIT
92 #include <conio.h>
93 #endif
94
95 #if HAVE_PTHREADS
96 #include <pthread.h>
97 #endif
98
99 #include <time.h>
100
101 #include "ffmpeg.h"
102 #include "cmdutils.h"
103
104 #include "libavutil/avassert.h"
105
106 const char program_name[] = "ffmpeg";
107 const int program_birth_year = 2000;
108
109 static FILE *vstats_file;
110
111 const char *const forced_keyframes_const_names[] = {
112     "n",
113     "n_forced",
114     "prev_forced_n",
115     "prev_forced_t",
116     "t",
117     NULL
118 };
119
120 static void do_video_stats(OutputStream *ost, int frame_size);
121 static int64_t getutime(void);
122 static int64_t getmaxrss(void);
123
124 static int run_as_daemon  = 0;
125 static int64_t video_size = 0;
126 static int64_t audio_size = 0;
127 static int64_t subtitle_size = 0;
128 static int64_t extra_size = 0;
129 static int nb_frames_dup = 0;
130 static int nb_frames_drop = 0;
131 static int64_t decode_error_stat[2];
132
133 static int current_time;
134 AVIOContext *progress_avio = NULL;
135
136 static uint8_t *subtitle_out;
137
138 #if HAVE_PTHREADS
139 /* signal to input threads that they should exit; set by the main thread */
140 static int transcoding_finished;
141 #endif
142
143 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
144
145 InputStream **input_streams = NULL;
146 int        nb_input_streams = 0;
147 InputFile   **input_files   = NULL;
148 int        nb_input_files   = 0;
149
150 OutputStream **output_streams = NULL;
151 int         nb_output_streams = 0;
152 OutputFile   **output_files   = NULL;
153 int         nb_output_files   = 0;
154
155 FilterGraph **filtergraphs;
156 int        nb_filtergraphs;
157
158 #if HAVE_TERMIOS_H
159
160 /* init terminal so that we can grab keys */
161 static struct termios oldtty;
162 static int restore_tty;
163 #endif
164
165
166 /* sub2video hack:
167    Convert subtitles to video with alpha to insert them in filter graphs.
168    This is a temporary solution until libavfilter gets real subtitles support.
169  */
170
171 static int sub2video_get_blank_frame(InputStream *ist)
172 {
173     int ret;
174     AVFrame *frame = ist->sub2video.frame;
175
176     av_frame_unref(frame);
177     ist->sub2video.frame->width  = ist->sub2video.w;
178     ist->sub2video.frame->height = ist->sub2video.h;
179     ist->sub2video.frame->format = AV_PIX_FMT_RGB32;
180     if ((ret = av_frame_get_buffer(frame, 32)) < 0)
181         return ret;
182     memset(frame->data[0], 0, frame->height * frame->linesize[0]);
183     return 0;
184 }
185
186 static void sub2video_copy_rect(uint8_t *dst, int dst_linesize, int w, int h,
187                                 AVSubtitleRect *r)
188 {
189     uint32_t *pal, *dst2;
190     uint8_t *src, *src2;
191     int x, y;
192
193     if (r->type != SUBTITLE_BITMAP) {
194         av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n");
195         return;
196     }
197     if (r->x < 0 || r->x + r->w > w || r->y < 0 || r->y + r->h > h) {
198         av_log(NULL, AV_LOG_WARNING, "sub2video: rectangle overflowing\n");
199         return;
200     }
201
202     dst += r->y * dst_linesize + r->x * 4;
203     src = r->pict.data[0];
204     pal = (uint32_t *)r->pict.data[1];
205     for (y = 0; y < r->h; y++) {
206         dst2 = (uint32_t *)dst;
207         src2 = src;
208         for (x = 0; x < r->w; x++)
209             *(dst2++) = pal[*(src2++)];
210         dst += dst_linesize;
211         src += r->pict.linesize[0];
212     }
213 }
214
215 static void sub2video_push_ref(InputStream *ist, int64_t pts)
216 {
217     AVFrame *frame = ist->sub2video.frame;
218     int i;
219
220     av_assert1(frame->data[0]);
221     ist->sub2video.last_pts = frame->pts = pts;
222     for (i = 0; i < ist->nb_filters; i++)
223         av_buffersrc_add_frame_flags(ist->filters[i]->filter, frame,
224                                      AV_BUFFERSRC_FLAG_KEEP_REF |
225                                      AV_BUFFERSRC_FLAG_PUSH);
226 }
227
228 static void sub2video_update(InputStream *ist, AVSubtitle *sub)
229 {
230     int w = ist->sub2video.w, h = ist->sub2video.h;
231     AVFrame *frame = ist->sub2video.frame;
232     int8_t *dst;
233     int     dst_linesize;
234     int num_rects, i;
235     int64_t pts, end_pts;
236
237     if (!frame)
238         return;
239     if (sub) {
240         pts       = av_rescale_q(sub->pts + sub->start_display_time * 1000,
241                                  AV_TIME_BASE_Q, ist->st->time_base);
242         end_pts   = av_rescale_q(sub->pts + sub->end_display_time   * 1000,
243                                  AV_TIME_BASE_Q, ist->st->time_base);
244         num_rects = sub->num_rects;
245     } else {
246         pts       = ist->sub2video.end_pts;
247         end_pts   = INT64_MAX;
248         num_rects = 0;
249     }
250     if (sub2video_get_blank_frame(ist) < 0) {
251         av_log(ist->st->codec, AV_LOG_ERROR,
252                "Impossible to get a blank canvas.\n");
253         return;
254     }
255     dst          = frame->data    [0];
256     dst_linesize = frame->linesize[0];
257     for (i = 0; i < num_rects; i++)
258         sub2video_copy_rect(dst, dst_linesize, w, h, sub->rects[i]);
259     sub2video_push_ref(ist, pts);
260     ist->sub2video.end_pts = end_pts;
261 }
262
263 static void sub2video_heartbeat(InputStream *ist, int64_t pts)
264 {
265     InputFile *infile = input_files[ist->file_index];
266     int i, j, nb_reqs;
267     int64_t pts2;
268
269     /* When a frame is read from a file, examine all sub2video streams in
270        the same file and send the sub2video frame again. Otherwise, decoded
271        video frames could be accumulating in the filter graph while a filter
272        (possibly overlay) is desperately waiting for a subtitle frame. */
273     for (i = 0; i < infile->nb_streams; i++) {
274         InputStream *ist2 = input_streams[infile->ist_index + i];
275         if (!ist2->sub2video.frame)
276             continue;
277         /* subtitles seem to be usually muxed ahead of other streams;
278            if not, substracting a larger time here is necessary */
279         pts2 = av_rescale_q(pts, ist->st->time_base, ist2->st->time_base) - 1;
280         /* do not send the heartbeat frame if the subtitle is already ahead */
281         if (pts2 <= ist2->sub2video.last_pts)
282             continue;
283         if (pts2 >= ist2->sub2video.end_pts || !ist2->sub2video.frame->data[0])
284             sub2video_update(ist2, NULL);
285         for (j = 0, nb_reqs = 0; j < ist2->nb_filters; j++)
286             nb_reqs += av_buffersrc_get_nb_failed_requests(ist2->filters[j]->filter);
287         if (nb_reqs)
288             sub2video_push_ref(ist2, pts2);
289     }
290 }
291
292 static void sub2video_flush(InputStream *ist)
293 {
294     int i;
295
296     for (i = 0; i < ist->nb_filters; i++)
297         av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
298 }
299
300 /* end of sub2video hack */
301
302 void term_exit(void)
303 {
304     av_log(NULL, AV_LOG_QUIET, "%s", "");
305 #if HAVE_TERMIOS_H
306     if(restore_tty)
307         tcsetattr (0, TCSANOW, &oldtty);
308 #endif
309 }
310
311 static volatile int received_sigterm = 0;
312 static volatile int received_nb_signals = 0;
313
314 static void
315 sigterm_handler(int sig)
316 {
317     received_sigterm = sig;
318     received_nb_signals++;
319     term_exit();
320     if(received_nb_signals > 3)
321         exit(123);
322 }
323
324 void term_init(void)
325 {
326 #if HAVE_TERMIOS_H
327     if(!run_as_daemon){
328         struct termios tty;
329         int istty = 1;
330 #if HAVE_ISATTY
331         istty = isatty(0) && isatty(2);
332 #endif
333         if (istty && tcgetattr (0, &tty) == 0) {
334             oldtty = tty;
335             restore_tty = 1;
336             atexit(term_exit);
337
338             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
339                              |INLCR|IGNCR|ICRNL|IXON);
340             tty.c_oflag |= OPOST;
341             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
342             tty.c_cflag &= ~(CSIZE|PARENB);
343             tty.c_cflag |= CS8;
344             tty.c_cc[VMIN] = 1;
345             tty.c_cc[VTIME] = 0;
346
347             tcsetattr (0, TCSANOW, &tty);
348         }
349         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
350     }
351 #endif
352     avformat_network_deinit();
353
354     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
355     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
356 #ifdef SIGXCPU
357     signal(SIGXCPU, sigterm_handler);
358 #endif
359 }
360
361 /* read a key without blocking */
362 static int read_key(void)
363 {
364     unsigned char ch;
365 #if HAVE_TERMIOS_H
366     int n = 1;
367     struct timeval tv;
368     fd_set rfds;
369
370     FD_ZERO(&rfds);
371     FD_SET(0, &rfds);
372     tv.tv_sec = 0;
373     tv.tv_usec = 0;
374     n = select(1, &rfds, NULL, NULL, &tv);
375     if (n > 0) {
376         n = read(0, &ch, 1);
377         if (n == 1)
378             return ch;
379
380         return n;
381     }
382 #elif HAVE_KBHIT
383 #    if HAVE_PEEKNAMEDPIPE
384     static int is_pipe;
385     static HANDLE input_handle;
386     DWORD dw, nchars;
387     if(!input_handle){
388         input_handle = GetStdHandle(STD_INPUT_HANDLE);
389         is_pipe = !GetConsoleMode(input_handle, &dw);
390     }
391
392     if (stdin->_cnt > 0) {
393         read(0, &ch, 1);
394         return ch;
395     }
396     if (is_pipe) {
397         /* When running under a GUI, you will end here. */
398         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL)) {
399             // input pipe may have been closed by the program that ran ffmpeg
400             return -1;
401         }
402         //Read it
403         if(nchars != 0) {
404             read(0, &ch, 1);
405             return ch;
406         }else{
407             return -1;
408         }
409     }
410 #    endif
411     if(kbhit())
412         return(getch());
413 #endif
414     return -1;
415 }
416
417 static int decode_interrupt_cb(void *ctx)
418 {
419     return received_nb_signals > 1;
420 }
421
422 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
423
424 static void exit_program(void)
425 {
426     int i, j;
427
428     if (do_benchmark) {
429         int maxrss = getmaxrss() / 1024;
430         printf("bench: maxrss=%ikB\n", maxrss);
431     }
432
433     for (i = 0; i < nb_filtergraphs; i++) {
434         avfilter_graph_free(&filtergraphs[i]->graph);
435         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
436             av_freep(&filtergraphs[i]->inputs[j]->name);
437             av_freep(&filtergraphs[i]->inputs[j]);
438         }
439         av_freep(&filtergraphs[i]->inputs);
440         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
441             av_freep(&filtergraphs[i]->outputs[j]->name);
442             av_freep(&filtergraphs[i]->outputs[j]);
443         }
444         av_freep(&filtergraphs[i]->outputs);
445         av_freep(&filtergraphs[i]->graph_desc);
446         av_freep(&filtergraphs[i]);
447     }
448     av_freep(&filtergraphs);
449
450     av_freep(&subtitle_out);
451
452     /* close files */
453     for (i = 0; i < nb_output_files; i++) {
454         AVFormatContext *s = output_files[i]->ctx;
455         if (s && !(s->oformat->flags & AVFMT_NOFILE) && s->pb)
456             avio_close(s->pb);
457         avformat_free_context(s);
458         av_dict_free(&output_files[i]->opts);
459         av_freep(&output_files[i]);
460     }
461     for (i = 0; i < nb_output_streams; i++) {
462         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
463         while (bsfc) {
464             AVBitStreamFilterContext *next = bsfc->next;
465             av_bitstream_filter_close(bsfc);
466             bsfc = next;
467         }
468         output_streams[i]->bitstream_filters = NULL;
469         avcodec_free_frame(&output_streams[i]->filtered_frame);
470
471         av_freep(&output_streams[i]->forced_keyframes);
472         av_expr_free(output_streams[i]->forced_keyframes_pexpr);
473         av_freep(&output_streams[i]->avfilter);
474         av_freep(&output_streams[i]->logfile_prefix);
475         av_freep(&output_streams[i]);
476     }
477     for (i = 0; i < nb_input_files; i++) {
478         avformat_close_input(&input_files[i]->ctx);
479         av_freep(&input_files[i]);
480     }
481     for (i = 0; i < nb_input_streams; i++) {
482         av_frame_free(&input_streams[i]->decoded_frame);
483         av_frame_free(&input_streams[i]->filter_frame);
484         av_dict_free(&input_streams[i]->opts);
485         avsubtitle_free(&input_streams[i]->prev_sub.subtitle);
486         av_frame_free(&input_streams[i]->sub2video.frame);
487         av_freep(&input_streams[i]->filters);
488         av_freep(&input_streams[i]);
489     }
490
491     if (vstats_file)
492         fclose(vstats_file);
493     av_free(vstats_filename);
494
495     av_freep(&input_streams);
496     av_freep(&input_files);
497     av_freep(&output_streams);
498     av_freep(&output_files);
499
500     uninit_opts();
501
502     avformat_network_deinit();
503
504     if (received_sigterm) {
505         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
506                (int) received_sigterm);
507     }
508 }
509
510 void assert_avoptions(AVDictionary *m)
511 {
512     AVDictionaryEntry *t;
513     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
514         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
515         exit(1);
516     }
517 }
518
519 static void abort_codec_experimental(AVCodec *c, int encoder)
520 {
521     exit(1);
522 }
523
524 static void update_benchmark(const char *fmt, ...)
525 {
526     if (do_benchmark_all) {
527         int64_t t = getutime();
528         va_list va;
529         char buf[1024];
530
531         if (fmt) {
532             va_start(va, fmt);
533             vsnprintf(buf, sizeof(buf), fmt, va);
534             va_end(va);
535             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
536         }
537         current_time = t;
538     }
539 }
540
541 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
542 {
543     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
544     AVCodecContext          *avctx = ost->st->codec;
545     int ret;
546
547     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
548         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
549         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
550
551     if ((avctx->codec_type == AVMEDIA_TYPE_AUDIO || avctx->codec_type == AVMEDIA_TYPE_VIDEO) && pkt->dts != AV_NOPTS_VALUE) {
552         int64_t max = ost->st->cur_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
553         if (ost->st->cur_dts && ost->st->cur_dts != AV_NOPTS_VALUE &&  max > pkt->dts) {
554             av_log(s, max - pkt->dts > 2 || avctx->codec_type == AVMEDIA_TYPE_VIDEO ? AV_LOG_WARNING : AV_LOG_DEBUG,
555                    "st:%d PTS: %"PRId64" DTS: %"PRId64" < %"PRId64" invalid, clipping\n", pkt->stream_index, pkt->pts, pkt->dts, max);
556             if(pkt->pts >= pkt->dts)
557                 pkt->pts = FFMAX(pkt->pts, max);
558             pkt->dts = max;
559         }
560     }
561
562     /*
563      * Audio encoders may split the packets --  #frames in != #packets out.
564      * But there is no reordering, so we can limit the number of output packets
565      * by simply dropping them here.
566      * Counting encoded video frames needs to be done separately because of
567      * reordering, see do_video_out()
568      */
569     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
570         if (ost->frame_number >= ost->max_frames) {
571             av_free_packet(pkt);
572             return;
573         }
574         ost->frame_number++;
575     }
576
577     while (bsfc) {
578         AVPacket new_pkt = *pkt;
579         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
580                                            &new_pkt.data, &new_pkt.size,
581                                            pkt->data, pkt->size,
582                                            pkt->flags & AV_PKT_FLAG_KEY);
583         if(a == 0 && new_pkt.data != pkt->data && new_pkt.destruct) {
584             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
585             if(t) {
586                 memcpy(t, new_pkt.data, new_pkt.size);
587                 memset(t + new_pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
588                 new_pkt.data = t;
589                 new_pkt.buf = NULL;
590                 a = 1;
591             } else
592                 a = AVERROR(ENOMEM);
593         }
594         if (a > 0) {
595             av_free_packet(pkt);
596             new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
597                                            av_buffer_default_free, NULL, 0);
598             if (!new_pkt.buf)
599                 exit(1);
600         } else if (a < 0) {
601             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
602                    bsfc->filter->name, pkt->stream_index,
603                    avctx->codec ? avctx->codec->name : "copy");
604             print_error("", a);
605             if (exit_on_error)
606                 exit(1);
607         }
608         *pkt = new_pkt;
609
610         bsfc = bsfc->next;
611     }
612
613     pkt->stream_index = ost->index;
614
615     if (debug_ts) {
616         av_log(NULL, AV_LOG_INFO, "muxer <- type:%s "
617                 "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s size:%d\n",
618                 av_get_media_type_string(ost->st->codec->codec_type),
619                 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ost->st->time_base),
620                 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->st->time_base),
621                 pkt->size
622               );
623     }
624
625     ret = av_interleaved_write_frame(s, pkt);
626     if (ret < 0) {
627         print_error("av_interleaved_write_frame()", ret);
628         exit(1);
629     }
630 }
631
632 static void close_output_stream(OutputStream *ost)
633 {
634     OutputFile *of = output_files[ost->file_index];
635
636     ost->finished = 1;
637     if (of->shortest) {
638         int64_t end = av_rescale_q(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, AV_TIME_BASE_Q);
639         of->recording_time = FFMIN(of->recording_time, end);
640     }
641 }
642
643 static int check_recording_time(OutputStream *ost)
644 {
645     OutputFile *of = output_files[ost->file_index];
646
647     if (of->recording_time != INT64_MAX &&
648         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
649                       AV_TIME_BASE_Q) >= 0) {
650         close_output_stream(ost);
651         return 0;
652     }
653     return 1;
654 }
655
656 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
657                          AVFrame *frame)
658 {
659     AVCodecContext *enc = ost->st->codec;
660     AVPacket pkt;
661     int got_packet = 0;
662
663     av_init_packet(&pkt);
664     pkt.data = NULL;
665     pkt.size = 0;
666
667     if (!check_recording_time(ost))
668         return;
669
670     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
671         frame->pts = ost->sync_opts;
672     ost->sync_opts = frame->pts + frame->nb_samples;
673
674     av_assert0(pkt.size || !pkt.data);
675     update_benchmark(NULL);
676     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
677         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
678         exit(1);
679     }
680     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
681
682     if (got_packet) {
683         if (pkt.pts != AV_NOPTS_VALUE)
684             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
685         if (pkt.dts != AV_NOPTS_VALUE)
686             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
687         if (pkt.duration > 0)
688             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
689
690         if (debug_ts) {
691             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
692                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
693                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
694                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
695         }
696
697         audio_size += pkt.size;
698         write_frame(s, &pkt, ost);
699
700         av_free_packet(&pkt);
701     }
702 }
703
704 static void do_subtitle_out(AVFormatContext *s,
705                             OutputStream *ost,
706                             InputStream *ist,
707                             AVSubtitle *sub)
708 {
709     int subtitle_out_max_size = 1024 * 1024;
710     int subtitle_out_size, nb, i;
711     AVCodecContext *enc;
712     AVPacket pkt;
713     int64_t pts;
714
715     if (sub->pts == AV_NOPTS_VALUE) {
716         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
717         if (exit_on_error)
718             exit(1);
719         return;
720     }
721
722     enc = ost->st->codec;
723
724     if (!subtitle_out) {
725         subtitle_out = av_malloc(subtitle_out_max_size);
726     }
727
728     /* Note: DVB subtitle need one packet to draw them and one other
729        packet to clear them */
730     /* XXX: signal it in the codec context ? */
731     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
732         nb = 2;
733     else
734         nb = 1;
735
736     /* shift timestamp to honor -ss and make check_recording_time() work with -t */
737     pts = sub->pts - output_files[ost->file_index]->start_time;
738     for (i = 0; i < nb; i++) {
739         ost->sync_opts = av_rescale_q(pts, AV_TIME_BASE_Q, enc->time_base);
740         if (!check_recording_time(ost))
741             return;
742
743         sub->pts = pts;
744         // start_display_time is required to be 0
745         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
746         sub->end_display_time  -= sub->start_display_time;
747         sub->start_display_time = 0;
748         if (i == 1)
749             sub->num_rects = 0;
750         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
751                                                     subtitle_out_max_size, sub);
752         if (subtitle_out_size < 0) {
753             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
754             exit(1);
755         }
756
757         av_init_packet(&pkt);
758         pkt.data = subtitle_out;
759         pkt.size = subtitle_out_size;
760         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
761         pkt.duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->st->time_base);
762         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
763             /* XXX: the pts correction is handled here. Maybe handling
764                it in the codec would be better */
765             if (i == 0)
766                 pkt.pts += 90 * sub->start_display_time;
767             else
768                 pkt.pts += 90 * sub->end_display_time;
769         }
770         subtitle_size += pkt.size;
771         write_frame(s, &pkt, ost);
772     }
773 }
774
775 static void do_video_out(AVFormatContext *s,
776                          OutputStream *ost,
777                          AVFrame *in_picture)
778 {
779     int ret, format_video_sync;
780     AVPacket pkt;
781     AVCodecContext *enc = ost->st->codec;
782     int nb_frames, i;
783     double sync_ipts, delta;
784     double duration = 0;
785     int frame_size = 0;
786     InputStream *ist = NULL;
787
788     if (ost->source_index >= 0)
789         ist = input_streams[ost->source_index];
790
791     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
792         duration = 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base));
793
794     sync_ipts = in_picture->pts;
795     delta = sync_ipts - ost->sync_opts + duration;
796
797     /* by default, we output a single frame */
798     nb_frames = 1;
799
800     format_video_sync = video_sync_method;
801     if (format_video_sync == VSYNC_AUTO)
802         format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : VSYNC_CFR;
803
804     switch (format_video_sync) {
805     case VSYNC_CFR:
806         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
807         if (delta < -1.1)
808             nb_frames = 0;
809         else if (delta > 1.1)
810             nb_frames = lrintf(delta);
811         break;
812     case VSYNC_VFR:
813         if (delta <= -0.6)
814             nb_frames = 0;
815         else if (delta > 0.6)
816             ost->sync_opts = lrint(sync_ipts);
817         break;
818     case VSYNC_DROP:
819     case VSYNC_PASSTHROUGH:
820         ost->sync_opts = lrint(sync_ipts);
821         break;
822     default:
823         av_assert0(0);
824     }
825
826     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
827     if (nb_frames == 0) {
828         nb_frames_drop++;
829         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
830         return;
831     } else if (nb_frames > 1) {
832         if (nb_frames > dts_error_threshold * 30) {
833             av_log(NULL, AV_LOG_ERROR, "%d frame duplication too large, skipping\n", nb_frames - 1);
834             nb_frames_drop++;
835             return;
836         }
837         nb_frames_dup += nb_frames - 1;
838         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
839     }
840
841   /* duplicates frame if needed */
842   for (i = 0; i < nb_frames; i++) {
843     av_init_packet(&pkt);
844     pkt.data = NULL;
845     pkt.size = 0;
846
847     in_picture->pts = ost->sync_opts;
848
849 #if 1
850     if (!check_recording_time(ost))
851 #else
852     if (ost->frame_number >= ost->max_frames)
853 #endif
854         return;
855
856     if (s->oformat->flags & AVFMT_RAWPICTURE &&
857         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
858         /* raw pictures are written as AVPicture structure to
859            avoid any copies. We support temporarily the older
860            method. */
861         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
862         enc->coded_frame->top_field_first  = in_picture->top_field_first;
863         if (enc->coded_frame->interlaced_frame)
864             enc->field_order = enc->coded_frame->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
865         else
866             enc->field_order = AV_FIELD_PROGRESSIVE;
867         pkt.data   = (uint8_t *)in_picture;
868         pkt.size   =  sizeof(AVPicture);
869         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
870         pkt.flags |= AV_PKT_FLAG_KEY;
871
872         video_size += pkt.size;
873         write_frame(s, &pkt, ost);
874     } else {
875         int got_packet, forced_keyframe = 0;
876         double pts_time;
877
878         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME) &&
879             ost->top_field_first >= 0)
880             in_picture->top_field_first = !!ost->top_field_first;
881
882         if (in_picture->interlaced_frame) {
883             if (enc->codec->id == AV_CODEC_ID_MJPEG)
884                 enc->field_order = in_picture->top_field_first ? AV_FIELD_TT:AV_FIELD_BB;
885             else
886                 enc->field_order = in_picture->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
887         } else
888             enc->field_order = AV_FIELD_PROGRESSIVE;
889
890         in_picture->quality = ost->st->codec->global_quality;
891         if (!enc->me_threshold)
892             in_picture->pict_type = 0;
893
894         pts_time = in_picture->pts != AV_NOPTS_VALUE ?
895             in_picture->pts * av_q2d(enc->time_base) : NAN;
896         if (ost->forced_kf_index < ost->forced_kf_count &&
897             in_picture->pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
898             ost->forced_kf_index++;
899             forced_keyframe = 1;
900         } else if (ost->forced_keyframes_pexpr) {
901             double res;
902             ost->forced_keyframes_expr_const_values[FKF_T] = pts_time;
903             res = av_expr_eval(ost->forced_keyframes_pexpr,
904                                ost->forced_keyframes_expr_const_values, NULL);
905             av_dlog(NULL, "force_key_frame: n:%f n_forced:%f prev_forced_n:%f t:%f prev_forced_t:%f -> res:%f\n",
906                     ost->forced_keyframes_expr_const_values[FKF_N],
907                     ost->forced_keyframes_expr_const_values[FKF_N_FORCED],
908                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N],
909                     ost->forced_keyframes_expr_const_values[FKF_T],
910                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T],
911                     res);
912             if (res) {
913                 forced_keyframe = 1;
914                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] =
915                     ost->forced_keyframes_expr_const_values[FKF_N];
916                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] =
917                     ost->forced_keyframes_expr_const_values[FKF_T];
918                 ost->forced_keyframes_expr_const_values[FKF_N_FORCED] += 1;
919             }
920
921             ost->forced_keyframes_expr_const_values[FKF_N] += 1;
922         }
923         if (forced_keyframe) {
924             in_picture->pict_type = AV_PICTURE_TYPE_I;
925             av_log(NULL, AV_LOG_DEBUG, "Forced keyframe at time %f\n", pts_time);
926         }
927
928         update_benchmark(NULL);
929         ret = avcodec_encode_video2(enc, &pkt, in_picture, &got_packet);
930         update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
931         if (ret < 0) {
932             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
933             exit(1);
934         }
935
936         if (got_packet) {
937             if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
938                 pkt.pts = ost->sync_opts;
939
940             if (pkt.pts != AV_NOPTS_VALUE)
941                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
942             if (pkt.dts != AV_NOPTS_VALUE)
943                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
944
945             if (debug_ts) {
946                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
947                     "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
948                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
949                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
950             }
951
952             frame_size = pkt.size;
953             video_size += pkt.size;
954             write_frame(s, &pkt, ost);
955             av_free_packet(&pkt);
956
957             /* if two pass, output log */
958             if (ost->logfile && enc->stats_out) {
959                 fprintf(ost->logfile, "%s", enc->stats_out);
960             }
961         }
962     }
963     ost->sync_opts++;
964     /*
965      * For video, number of frames in == number of packets out.
966      * But there may be reordering, so we can't throw away frames on encoder
967      * flush, we need to limit them here, before they go into encoder.
968      */
969     ost->frame_number++;
970
971     if (vstats_filename && frame_size)
972         do_video_stats(ost, frame_size);
973   }
974 }
975
976 static double psnr(double d)
977 {
978     return -10.0 * log(d) / log(10.0);
979 }
980
981 static void do_video_stats(OutputStream *ost, int frame_size)
982 {
983     AVCodecContext *enc;
984     int frame_number;
985     double ti1, bitrate, avg_bitrate;
986
987     /* this is executed just the first time do_video_stats is called */
988     if (!vstats_file) {
989         vstats_file = fopen(vstats_filename, "w");
990         if (!vstats_file) {
991             perror("fopen");
992             exit(1);
993         }
994     }
995
996     enc = ost->st->codec;
997     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
998         frame_number = ost->st->nb_frames;
999         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1000         if (enc->flags&CODEC_FLAG_PSNR)
1001             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1002
1003         fprintf(vstats_file,"f_size= %6d ", frame_size);
1004         /* compute pts value */
1005         ti1 = ost->st->pts.val * av_q2d(enc->time_base);
1006         if (ti1 < 0.01)
1007             ti1 = 0.01;
1008
1009         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1010         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1011         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1012                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1013         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1014     }
1015 }
1016
1017 /**
1018  * Get and encode new output from any of the filtergraphs, without causing
1019  * activity.
1020  *
1021  * @return  0 for success, <0 for severe errors
1022  */
1023 static int reap_filters(void)
1024 {
1025     AVFrame *filtered_frame = NULL;
1026     int i;
1027     int64_t frame_pts;
1028
1029     /* Reap all buffers present in the buffer sinks */
1030     for (i = 0; i < nb_output_streams; i++) {
1031         OutputStream *ost = output_streams[i];
1032         OutputFile    *of = output_files[ost->file_index];
1033         int ret = 0;
1034
1035         if (!ost->filter)
1036             continue;
1037
1038         if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
1039             return AVERROR(ENOMEM);
1040         } else
1041             avcodec_get_frame_defaults(ost->filtered_frame);
1042         filtered_frame = ost->filtered_frame;
1043
1044         while (1) {
1045             ret = av_buffersink_get_frame_flags(ost->filter->filter, filtered_frame,
1046                                                AV_BUFFERSINK_FLAG_NO_REQUEST);
1047             if (ret < 0) {
1048                 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1049                     av_log(NULL, AV_LOG_WARNING,
1050                            "Error in av_buffersink_get_frame_flags(): %s\n", av_err2str(ret));
1051                 }
1052                 break;
1053             }
1054             frame_pts = AV_NOPTS_VALUE;
1055             if (filtered_frame->pts != AV_NOPTS_VALUE) {
1056                 filtered_frame->pts = frame_pts = av_rescale_q(filtered_frame->pts,
1057                                                 ost->filter->filter->inputs[0]->time_base,
1058                                                 ost->st->codec->time_base) -
1059                                     av_rescale_q(of->start_time,
1060                                                 AV_TIME_BASE_Q,
1061                                                 ost->st->codec->time_base);
1062             }
1063             //if (ost->source_index >= 0)
1064             //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1065
1066
1067             switch (ost->filter->filter->inputs[0]->type) {
1068             case AVMEDIA_TYPE_VIDEO:
1069                 filtered_frame->pts = frame_pts;
1070                 if (!ost->frame_aspect_ratio.num)
1071                     ost->st->codec->sample_aspect_ratio = filtered_frame->sample_aspect_ratio;
1072
1073                 do_video_out(of->ctx, ost, filtered_frame);
1074                 break;
1075             case AVMEDIA_TYPE_AUDIO:
1076                 filtered_frame->pts = frame_pts;
1077                 if (!(ost->st->codec->codec->capabilities & CODEC_CAP_PARAM_CHANGE) &&
1078                     ost->st->codec->channels != av_frame_get_channels(filtered_frame)) {
1079                     av_log(NULL, AV_LOG_ERROR,
1080                            "Audio filter graph output is not normalized and encoder does not support parameter changes\n");
1081                     break;
1082                 }
1083                 do_audio_out(of->ctx, ost, filtered_frame);
1084                 break;
1085             default:
1086                 // TODO support subtitle filters
1087                 av_assert0(0);
1088             }
1089
1090             av_frame_unref(filtered_frame);
1091         }
1092     }
1093
1094     return 0;
1095 }
1096
1097 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
1098 {
1099     char buf[1024];
1100     AVBPrint buf_script;
1101     OutputStream *ost;
1102     AVFormatContext *oc;
1103     int64_t total_size;
1104     AVCodecContext *enc;
1105     int frame_number, vid, i;
1106     double bitrate;
1107     int64_t pts = INT64_MIN;
1108     static int64_t last_time = -1;
1109     static int qp_histogram[52];
1110     int hours, mins, secs, us;
1111
1112     if (!print_stats && !is_last_report && !progress_avio)
1113         return;
1114
1115     if (!is_last_report) {
1116         if (last_time == -1) {
1117             last_time = cur_time;
1118             return;
1119         }
1120         if ((cur_time - last_time) < 500000)
1121             return;
1122         last_time = cur_time;
1123     }
1124
1125
1126     oc = output_files[0]->ctx;
1127
1128     total_size = avio_size(oc->pb);
1129     if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
1130         total_size = avio_tell(oc->pb);
1131
1132     buf[0] = '\0';
1133     vid = 0;
1134     av_bprint_init(&buf_script, 0, 1);
1135     for (i = 0; i < nb_output_streams; i++) {
1136         float q = -1;
1137         ost = output_streams[i];
1138         enc = ost->st->codec;
1139         if (!ost->stream_copy && enc->coded_frame)
1140             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1141         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1142             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1143             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1144                        ost->file_index, ost->index, q);
1145         }
1146         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1147             float fps, t = (cur_time-timer_start) / 1000000.0;
1148
1149             frame_number = ost->frame_number;
1150             fps = t > 1 ? frame_number / t : 0;
1151             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
1152                      frame_number, fps < 9.95, fps, q);
1153             av_bprintf(&buf_script, "frame=%d\n", frame_number);
1154             av_bprintf(&buf_script, "fps=%.1f\n", fps);
1155             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1156                        ost->file_index, ost->index, q);
1157             if (is_last_report)
1158                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1159             if (qp_hist) {
1160                 int j;
1161                 int qp = lrintf(q);
1162                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1163                     qp_histogram[qp]++;
1164                 for (j = 0; j < 32; j++)
1165                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
1166             }
1167             if ((enc->flags&CODEC_FLAG_PSNR) && (enc->coded_frame || is_last_report)) {
1168                 int j;
1169                 double error, error_sum = 0;
1170                 double scale, scale_sum = 0;
1171                 double p;
1172                 char type[3] = { 'Y','U','V' };
1173                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1174                 for (j = 0; j < 3; j++) {
1175                     if (is_last_report) {
1176                         error = enc->error[j];
1177                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1178                     } else {
1179                         error = enc->coded_frame->error[j];
1180                         scale = enc->width * enc->height * 255.0 * 255.0;
1181                     }
1182                     if (j)
1183                         scale /= 4;
1184                     error_sum += error;
1185                     scale_sum += scale;
1186                     p = psnr(error / scale);
1187                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], p);
1188                     av_bprintf(&buf_script, "stream_%d_%d_psnr_%c=%2.2f\n",
1189                                ost->file_index, ost->index, type[j] | 32, p);
1190                 }
1191                 p = psnr(error_sum / scale_sum);
1192                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1193                 av_bprintf(&buf_script, "stream_%d_%d_psnr_all=%2.2f\n",
1194                            ost->file_index, ost->index, p);
1195             }
1196             vid = 1;
1197         }
1198         /* compute min output value */
1199         if ((is_last_report || !ost->finished) && ost->st->pts.val != AV_NOPTS_VALUE)
1200             pts = FFMAX(pts, av_rescale_q(ost->st->pts.val,
1201                                           ost->st->time_base, AV_TIME_BASE_Q));
1202     }
1203
1204     secs = pts / AV_TIME_BASE;
1205     us = pts % AV_TIME_BASE;
1206     mins = secs / 60;
1207     secs %= 60;
1208     hours = mins / 60;
1209     mins %= 60;
1210
1211     bitrate = pts && total_size >= 0 ? total_size * 8 / (pts / 1000.0) : -1;
1212
1213     if (total_size < 0) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1214                                  "size=N/A time=");
1215     else                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1216                                  "size=%8.0fkB time=", total_size / 1024.0);
1217     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1218              "%02d:%02d:%02d.%02d ", hours, mins, secs,
1219              (100 * us) / AV_TIME_BASE);
1220     if (bitrate < 0) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1221                               "bitrate=N/A");
1222     else             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1223                               "bitrate=%6.1fkbits/s", bitrate);
1224     if (total_size < 0) av_bprintf(&buf_script, "total_size=N/A\n");
1225     else                av_bprintf(&buf_script, "total_size=%"PRId64"\n", total_size);
1226     av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
1227     av_bprintf(&buf_script, "out_time=%02d:%02d:%02d.%06d\n",
1228                hours, mins, secs, us);
1229
1230     if (nb_frames_dup || nb_frames_drop)
1231         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1232                 nb_frames_dup, nb_frames_drop);
1233     av_bprintf(&buf_script, "dup_frames=%d\n", nb_frames_dup);
1234     av_bprintf(&buf_script, "drop_frames=%d\n", nb_frames_drop);
1235
1236     if (print_stats || is_last_report) {
1237         if (print_stats==1 && AV_LOG_INFO > av_log_get_level()) {
1238             fprintf(stderr, "%s    \r", buf);
1239         } else
1240             av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1241
1242     fflush(stderr);
1243     }
1244
1245     if (progress_avio) {
1246         av_bprintf(&buf_script, "progress=%s\n",
1247                    is_last_report ? "end" : "continue");
1248         avio_write(progress_avio, buf_script.str,
1249                    FFMIN(buf_script.len, buf_script.size - 1));
1250         avio_flush(progress_avio);
1251         av_bprint_finalize(&buf_script, NULL);
1252         if (is_last_report) {
1253             avio_close(progress_avio);
1254             progress_avio = NULL;
1255         }
1256     }
1257
1258     if (is_last_report) {
1259         int64_t raw= audio_size + video_size + subtitle_size + extra_size;
1260         av_log(NULL, AV_LOG_INFO, "\n");
1261         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB subtitle:%1.0f global headers:%1.0fkB muxing overhead %f%%\n",
1262                video_size / 1024.0,
1263                audio_size / 1024.0,
1264                subtitle_size / 1024.0,
1265                extra_size / 1024.0,
1266                100.0 * (total_size - raw) / raw
1267         );
1268         if(video_size + audio_size + subtitle_size + extra_size == 0){
1269             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
1270         }
1271     }
1272 }
1273
1274 static void flush_encoders(void)
1275 {
1276     int i, ret;
1277
1278     for (i = 0; i < nb_output_streams; i++) {
1279         OutputStream   *ost = output_streams[i];
1280         AVCodecContext *enc = ost->st->codec;
1281         AVFormatContext *os = output_files[ost->file_index]->ctx;
1282         int stop_encoding = 0;
1283
1284         if (!ost->encoding_needed)
1285             continue;
1286
1287         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1288             continue;
1289         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
1290             continue;
1291
1292         for (;;) {
1293             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1294             const char *desc;
1295             int64_t *size;
1296
1297             switch (ost->st->codec->codec_type) {
1298             case AVMEDIA_TYPE_AUDIO:
1299                 encode = avcodec_encode_audio2;
1300                 desc   = "Audio";
1301                 size   = &audio_size;
1302                 break;
1303             case AVMEDIA_TYPE_VIDEO:
1304                 encode = avcodec_encode_video2;
1305                 desc   = "Video";
1306                 size   = &video_size;
1307                 break;
1308             default:
1309                 stop_encoding = 1;
1310             }
1311
1312             if (encode) {
1313                 AVPacket pkt;
1314                 int got_packet;
1315                 av_init_packet(&pkt);
1316                 pkt.data = NULL;
1317                 pkt.size = 0;
1318
1319                 update_benchmark(NULL);
1320                 ret = encode(enc, &pkt, NULL, &got_packet);
1321                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
1322                 if (ret < 0) {
1323                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1324                     exit(1);
1325                 }
1326                 *size += pkt.size;
1327                 if (ost->logfile && enc->stats_out) {
1328                     fprintf(ost->logfile, "%s", enc->stats_out);
1329                 }
1330                 if (!got_packet) {
1331                     stop_encoding = 1;
1332                     break;
1333                 }
1334                 if (pkt.pts != AV_NOPTS_VALUE)
1335                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1336                 if (pkt.dts != AV_NOPTS_VALUE)
1337                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1338                 if (pkt.duration > 0)
1339                     pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1340                 write_frame(os, &pkt, ost);
1341                 if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && vstats_filename) {
1342                     do_video_stats(ost, pkt.size);
1343                 }
1344             }
1345
1346             if (stop_encoding)
1347                 break;
1348         }
1349     }
1350 }
1351
1352 /*
1353  * Check whether a packet from ist should be written into ost at this time
1354  */
1355 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1356 {
1357     OutputFile *of = output_files[ost->file_index];
1358     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1359
1360     if (ost->source_index != ist_index)
1361         return 0;
1362
1363     if (of->start_time && ist->pts < of->start_time)
1364         return 0;
1365
1366     return 1;
1367 }
1368
1369 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1370 {
1371     OutputFile *of = output_files[ost->file_index];
1372     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
1373     AVPicture pict;
1374     AVPacket opkt;
1375
1376     av_init_packet(&opkt);
1377
1378     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1379         !ost->copy_initial_nonkeyframes)
1380         return;
1381
1382     if (!ost->frame_number && ist->pts < of->start_time &&
1383         !ost->copy_prior_start)
1384         return;
1385
1386     if (of->recording_time != INT64_MAX &&
1387         ist->pts >= of->recording_time + of->start_time) {
1388         close_output_stream(ost);
1389         return;
1390     }
1391
1392     /* force the input stream PTS */
1393     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1394         audio_size += pkt->size;
1395     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1396         video_size += pkt->size;
1397         ost->sync_opts++;
1398     } else if (ost->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1399         subtitle_size += pkt->size;
1400     }
1401
1402     if (pkt->pts != AV_NOPTS_VALUE)
1403         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1404     else
1405         opkt.pts = AV_NOPTS_VALUE;
1406
1407     if (pkt->dts == AV_NOPTS_VALUE)
1408         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
1409     else
1410         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1411     opkt.dts -= ost_tb_start_time;
1412
1413     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1414         int duration = av_get_audio_frame_duration(ist->st->codec, pkt->size);
1415         if(!duration)
1416             duration = ist->st->codec->frame_size;
1417         opkt.dts = opkt.pts = av_rescale_delta(ist->st->time_base, pkt->dts,
1418                                                (AVRational){1, ist->st->codec->sample_rate}, duration, &ist->filter_in_rescale_delta_last,
1419                                                ost->st->time_base) - ost_tb_start_time;
1420     }
1421
1422     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1423     opkt.flags    = pkt->flags;
1424
1425     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1426     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1427        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1428        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1429        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1430        ) {
1431         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY)) {
1432             opkt.buf = av_buffer_create(opkt.data, opkt.size, av_buffer_default_free, NULL, 0);
1433             if (!opkt.buf)
1434                 exit(1);
1435         }
1436     } else {
1437         opkt.data = pkt->data;
1438         opkt.size = pkt->size;
1439     }
1440
1441     if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (of->ctx->oformat->flags & AVFMT_RAWPICTURE)) {
1442         /* store AVPicture in AVPacket, as expected by the output format */
1443         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
1444         opkt.data = (uint8_t *)&pict;
1445         opkt.size = sizeof(AVPicture);
1446         opkt.flags |= AV_PKT_FLAG_KEY;
1447     }
1448
1449     write_frame(of->ctx, &opkt, ost);
1450     ost->st->codec->frame_number++;
1451 }
1452
1453 static void rate_emu_sleep(InputStream *ist)
1454 {
1455     if (input_files[ist->file_index]->rate_emu) {
1456         int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
1457         int64_t now = av_gettime() - ist->start;
1458         if (pts > now)
1459             av_usleep(pts - now);
1460     }
1461 }
1462
1463 int guess_input_channel_layout(InputStream *ist)
1464 {
1465     AVCodecContext *dec = ist->st->codec;
1466
1467     if (!dec->channel_layout) {
1468         char layout_name[256];
1469
1470         if (dec->channels > ist->guess_layout_max)
1471             return 0;
1472         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1473         if (!dec->channel_layout)
1474             return 0;
1475         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1476                                      dec->channels, dec->channel_layout);
1477         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1478                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1479     }
1480     return 1;
1481 }
1482
1483 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1484 {
1485     AVFrame *decoded_frame, *f;
1486     AVCodecContext *avctx = ist->st->codec;
1487     int i, ret, err = 0, resample_changed;
1488     AVRational decoded_frame_tb;
1489
1490     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1491         return AVERROR(ENOMEM);
1492     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1493         return AVERROR(ENOMEM);
1494     decoded_frame = ist->decoded_frame;
1495
1496     update_benchmark(NULL);
1497     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1498     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
1499
1500     if (ret >= 0 && avctx->sample_rate <= 0) {
1501         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
1502         ret = AVERROR_INVALIDDATA;
1503     }
1504
1505     if (*got_output || ret<0 || pkt->size)
1506         decode_error_stat[ret<0] ++;
1507
1508     if (!*got_output || ret < 0) {
1509         if (!pkt->size) {
1510             for (i = 0; i < ist->nb_filters; i++)
1511 #if 1
1512                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1513 #else
1514                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
1515 #endif
1516         }
1517         return ret;
1518     }
1519
1520 #if 1
1521     /* increment next_dts to use for the case where the input stream does not
1522        have timestamps or there are multiple frames in the packet */
1523     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1524                      avctx->sample_rate;
1525     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1526                      avctx->sample_rate;
1527 #endif
1528
1529     rate_emu_sleep(ist);
1530
1531     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1532                        ist->resample_channels       != avctx->channels               ||
1533                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1534                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1535     if (resample_changed) {
1536         char layout1[64], layout2[64];
1537
1538         if (!guess_input_channel_layout(ist)) {
1539             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1540                    "layout for Input Stream #%d.%d\n", ist->file_index,
1541                    ist->st->index);
1542             exit(1);
1543         }
1544         decoded_frame->channel_layout = avctx->channel_layout;
1545
1546         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1547                                      ist->resample_channel_layout);
1548         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1549                                      decoded_frame->channel_layout);
1550
1551         av_log(NULL, AV_LOG_INFO,
1552                "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",
1553                ist->file_index, ist->st->index,
1554                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1555                ist->resample_channels, layout1,
1556                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1557                avctx->channels, layout2);
1558
1559         ist->resample_sample_fmt     = decoded_frame->format;
1560         ist->resample_sample_rate    = decoded_frame->sample_rate;
1561         ist->resample_channel_layout = decoded_frame->channel_layout;
1562         ist->resample_channels       = avctx->channels;
1563
1564         for (i = 0; i < nb_filtergraphs; i++)
1565             if (ist_in_filtergraph(filtergraphs[i], ist)) {
1566                 FilterGraph *fg = filtergraphs[i];
1567                 int j;
1568                 if (configure_filtergraph(fg) < 0) {
1569                     av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1570                     exit(1);
1571                 }
1572                 for (j = 0; j < fg->nb_outputs; j++) {
1573                     OutputStream *ost = fg->outputs[j]->ost;
1574                     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1575                         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1576                         av_buffersink_set_frame_size(ost->filter->filter,
1577                                                      ost->st->codec->frame_size);
1578                 }
1579             }
1580     }
1581
1582     /* if the decoder provides a pts, use it instead of the last packet pts.
1583        the decoder could be delaying output by a packet or more. */
1584     if (decoded_frame->pts != AV_NOPTS_VALUE) {
1585         ist->dts = ist->next_dts = ist->pts = ist->next_pts = av_rescale_q(decoded_frame->pts, avctx->time_base, AV_TIME_BASE_Q);
1586         decoded_frame_tb   = avctx->time_base;
1587     } else if (decoded_frame->pkt_pts != AV_NOPTS_VALUE) {
1588         decoded_frame->pts = decoded_frame->pkt_pts;
1589         pkt->pts           = AV_NOPTS_VALUE;
1590         decoded_frame_tb   = ist->st->time_base;
1591     } else if (pkt->pts != AV_NOPTS_VALUE) {
1592         decoded_frame->pts = pkt->pts;
1593         pkt->pts           = AV_NOPTS_VALUE;
1594         decoded_frame_tb   = ist->st->time_base;
1595     }else {
1596         decoded_frame->pts = ist->dts;
1597         decoded_frame_tb   = AV_TIME_BASE_Q;
1598     }
1599     if (decoded_frame->pts != AV_NOPTS_VALUE)
1600         decoded_frame->pts = av_rescale_delta(decoded_frame_tb, decoded_frame->pts,
1601                                               (AVRational){1, ist->st->codec->sample_rate}, decoded_frame->nb_samples, &ist->filter_in_rescale_delta_last,
1602                                               (AVRational){1, ist->st->codec->sample_rate});
1603     for (i = 0; i < ist->nb_filters; i++) {
1604         if (i < ist->nb_filters - 1) {
1605             f = ist->filter_frame;
1606             err = av_frame_ref(f, decoded_frame);
1607             if (err < 0)
1608                 break;
1609         } else
1610             f = decoded_frame;
1611         err = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f,
1612                                      AV_BUFFERSRC_FLAG_PUSH);
1613         if (err < 0)
1614             break;
1615     }
1616     decoded_frame->pts = AV_NOPTS_VALUE;
1617
1618     av_frame_unref(ist->filter_frame);
1619     av_frame_unref(decoded_frame);
1620     return err < 0 ? err : ret;
1621 }
1622
1623 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1624 {
1625     AVFrame *decoded_frame, *f;
1626     void *buffer_to_free = NULL;
1627     int i, ret = 0, err = 0, resample_changed;
1628     int64_t best_effort_timestamp;
1629     AVRational *frame_sample_aspect;
1630
1631     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1632         return AVERROR(ENOMEM);
1633     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1634         return AVERROR(ENOMEM);
1635     decoded_frame = ist->decoded_frame;
1636     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
1637
1638     update_benchmark(NULL);
1639     ret = avcodec_decode_video2(ist->st->codec,
1640                                 decoded_frame, got_output, pkt);
1641     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
1642
1643     if (*got_output || ret<0 || pkt->size)
1644         decode_error_stat[ret<0] ++;
1645
1646     if (!*got_output || ret < 0) {
1647         if (!pkt->size) {
1648             for (i = 0; i < ist->nb_filters; i++)
1649 #if 1
1650                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1651 #else
1652                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
1653 #endif
1654         }
1655         return ret;
1656     }
1657
1658     if(ist->top_field_first>=0)
1659         decoded_frame->top_field_first = ist->top_field_first;
1660
1661     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
1662     if(best_effort_timestamp != AV_NOPTS_VALUE)
1663         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
1664
1665     if (debug_ts) {
1666         av_log(NULL, AV_LOG_INFO, "decoder -> ist_index:%d type:video "
1667                 "frame_pts:%s frame_pts_time:%s best_effort_ts:%"PRId64" best_effort_ts_time:%s keyframe:%d frame_type:%d \n",
1668                 ist->st->index, av_ts2str(decoded_frame->pts),
1669                 av_ts2timestr(decoded_frame->pts, &ist->st->time_base),
1670                 best_effort_timestamp,
1671                 av_ts2timestr(best_effort_timestamp, &ist->st->time_base),
1672                 decoded_frame->key_frame, decoded_frame->pict_type);
1673     }
1674
1675     pkt->size = 0;
1676
1677     rate_emu_sleep(ist);
1678
1679     if (ist->st->sample_aspect_ratio.num)
1680         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1681
1682     resample_changed = ist->resample_width   != decoded_frame->width  ||
1683                        ist->resample_height  != decoded_frame->height ||
1684                        ist->resample_pix_fmt != decoded_frame->format;
1685     if (resample_changed) {
1686         av_log(NULL, AV_LOG_INFO,
1687                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1688                ist->file_index, ist->st->index,
1689                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1690                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1691
1692         ist->resample_width   = decoded_frame->width;
1693         ist->resample_height  = decoded_frame->height;
1694         ist->resample_pix_fmt = decoded_frame->format;
1695
1696         for (i = 0; i < nb_filtergraphs; i++) {
1697             if (ist_in_filtergraph(filtergraphs[i], ist) && ist->reinit_filters &&
1698                 configure_filtergraph(filtergraphs[i]) < 0) {
1699                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1700                 exit(1);
1701             }
1702         }
1703     }
1704
1705     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
1706     for (i = 0; i < ist->nb_filters; i++) {
1707         if (!frame_sample_aspect->num)
1708             *frame_sample_aspect = ist->st->sample_aspect_ratio;
1709
1710         if (i < ist->nb_filters - 1) {
1711             f = ist->filter_frame;
1712             err = av_frame_ref(f, decoded_frame);
1713             if (err < 0)
1714                 break;
1715         } else
1716             f = decoded_frame;
1717         ret = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f, AV_BUFFERSRC_FLAG_PUSH);
1718         if (ret < 0) {
1719             av_log(NULL, AV_LOG_FATAL,
1720                    "Failed to inject frame into filter network: %s\n", av_err2str(ret));
1721             exit(1);
1722         }
1723     }
1724
1725     av_frame_unref(ist->filter_frame);
1726     av_frame_unref(decoded_frame);
1727     av_free(buffer_to_free);
1728     return err < 0 ? err : ret;
1729 }
1730
1731 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1732 {
1733     AVSubtitle subtitle;
1734     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1735                                           &subtitle, got_output, pkt);
1736
1737     if (*got_output || ret<0 || pkt->size)
1738         decode_error_stat[ret<0] ++;
1739
1740     if (ret < 0 || !*got_output) {
1741         if (!pkt->size)
1742             sub2video_flush(ist);
1743         return ret;
1744     }
1745
1746     if (ist->fix_sub_duration) {
1747         if (ist->prev_sub.got_output) {
1748             int end = av_rescale(subtitle.pts - ist->prev_sub.subtitle.pts,
1749                                  1000, AV_TIME_BASE);
1750             if (end < ist->prev_sub.subtitle.end_display_time) {
1751                 av_log(ist->st->codec, AV_LOG_DEBUG,
1752                        "Subtitle duration reduced from %d to %d\n",
1753                        ist->prev_sub.subtitle.end_display_time, end);
1754                 ist->prev_sub.subtitle.end_display_time = end;
1755             }
1756         }
1757         FFSWAP(int,        *got_output, ist->prev_sub.got_output);
1758         FFSWAP(int,        ret,         ist->prev_sub.ret);
1759         FFSWAP(AVSubtitle, subtitle,    ist->prev_sub.subtitle);
1760     }
1761
1762     sub2video_update(ist, &subtitle);
1763
1764     if (!*got_output || !subtitle.num_rects)
1765         return ret;
1766
1767     rate_emu_sleep(ist);
1768
1769     for (i = 0; i < nb_output_streams; i++) {
1770         OutputStream *ost = output_streams[i];
1771
1772         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1773             continue;
1774
1775         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle);
1776     }
1777
1778     avsubtitle_free(&subtitle);
1779     return ret;
1780 }
1781
1782 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1783 static int output_packet(InputStream *ist, const AVPacket *pkt)
1784 {
1785     int ret = 0, i;
1786     int got_output = 0;
1787
1788     AVPacket avpkt;
1789     if (!ist->saw_first_ts) {
1790         ist->dts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
1791         ist->pts = 0;
1792         if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
1793             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
1794             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
1795         }
1796         ist->saw_first_ts = 1;
1797     }
1798
1799     if (ist->next_dts == AV_NOPTS_VALUE)
1800         ist->next_dts = ist->dts;
1801     if (ist->next_pts == AV_NOPTS_VALUE)
1802         ist->next_pts = ist->pts;
1803
1804     if (pkt == NULL) {
1805         /* EOF handling */
1806         av_init_packet(&avpkt);
1807         avpkt.data = NULL;
1808         avpkt.size = 0;
1809         goto handle_eof;
1810     } else {
1811         avpkt = *pkt;
1812     }
1813
1814     if (pkt->dts != AV_NOPTS_VALUE) {
1815         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1816         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
1817             ist->next_pts = ist->pts = ist->dts;
1818     }
1819
1820     // while we have more to decode or while the decoder did output something on EOF
1821     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1822         int duration;
1823     handle_eof:
1824
1825         ist->pts = ist->next_pts;
1826         ist->dts = ist->next_dts;
1827
1828         if (avpkt.size && avpkt.size != pkt->size) {
1829             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1830                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1831             ist->showed_multi_packet_warning = 1;
1832         }
1833
1834         switch (ist->st->codec->codec_type) {
1835         case AVMEDIA_TYPE_AUDIO:
1836             ret = decode_audio    (ist, &avpkt, &got_output);
1837             break;
1838         case AVMEDIA_TYPE_VIDEO:
1839             ret = decode_video    (ist, &avpkt, &got_output);
1840             if (avpkt.duration) {
1841                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1842             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
1843                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
1844                 duration = ((int64_t)AV_TIME_BASE *
1845                                 ist->st->codec->time_base.num * ticks) /
1846                                 ist->st->codec->time_base.den;
1847             } else
1848                 duration = 0;
1849
1850             if(ist->dts != AV_NOPTS_VALUE && duration) {
1851                 ist->next_dts += duration;
1852             }else
1853                 ist->next_dts = AV_NOPTS_VALUE;
1854
1855             if (got_output)
1856                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
1857             break;
1858         case AVMEDIA_TYPE_SUBTITLE:
1859             ret = transcode_subtitles(ist, &avpkt, &got_output);
1860             break;
1861         default:
1862             return -1;
1863         }
1864
1865         if (ret < 0)
1866             return ret;
1867
1868         avpkt.dts=
1869         avpkt.pts= AV_NOPTS_VALUE;
1870
1871         // touch data and size only if not EOF
1872         if (pkt) {
1873             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
1874                 ret = avpkt.size;
1875             avpkt.data += ret;
1876             avpkt.size -= ret;
1877         }
1878         if (!got_output) {
1879             continue;
1880         }
1881     }
1882
1883     /* handle stream copy */
1884     if (!ist->decoding_needed) {
1885         rate_emu_sleep(ist);
1886         ist->dts = ist->next_dts;
1887         switch (ist->st->codec->codec_type) {
1888         case AVMEDIA_TYPE_AUDIO:
1889             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1890                              ist->st->codec->sample_rate;
1891             break;
1892         case AVMEDIA_TYPE_VIDEO:
1893             if (ist->framerate.num) {
1894                 // TODO: Remove work-around for c99-to-c89 issue 7
1895                 AVRational time_base_q = AV_TIME_BASE_Q;
1896                 int64_t next_dts = av_rescale_q(ist->next_dts, time_base_q, av_inv_q(ist->framerate));
1897                 ist->next_dts = av_rescale_q(next_dts + 1, av_inv_q(ist->framerate), time_base_q);
1898             } else if (pkt->duration) {
1899                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
1900             } else if(ist->st->codec->time_base.num != 0) {
1901                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
1902                 ist->next_dts += ((int64_t)AV_TIME_BASE *
1903                                   ist->st->codec->time_base.num * ticks) /
1904                                   ist->st->codec->time_base.den;
1905             }
1906             break;
1907         }
1908         ist->pts = ist->dts;
1909         ist->next_pts = ist->next_dts;
1910     }
1911     for (i = 0; pkt && i < nb_output_streams; i++) {
1912         OutputStream *ost = output_streams[i];
1913
1914         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1915             continue;
1916
1917         do_streamcopy(ist, ost, pkt);
1918     }
1919
1920     return 0;
1921 }
1922
1923 static void print_sdp(void)
1924 {
1925     char sdp[16384];
1926     int i;
1927     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
1928
1929     if (!avc)
1930         exit(1);
1931     for (i = 0; i < nb_output_files; i++)
1932         avc[i] = output_files[i]->ctx;
1933
1934     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
1935     printf("SDP:\n%s\n", sdp);
1936     fflush(stdout);
1937     av_freep(&avc);
1938 }
1939
1940 static int init_input_stream(int ist_index, char *error, int error_len)
1941 {
1942     int ret;
1943     InputStream *ist = input_streams[ist_index];
1944
1945     if (ist->decoding_needed) {
1946         AVCodec *codec = ist->dec;
1947         if (!codec) {
1948             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
1949                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
1950             return AVERROR(EINVAL);
1951         }
1952
1953         av_opt_set_int(ist->st->codec, "refcounted_frames", 1, 0);
1954
1955         if (!av_dict_get(ist->opts, "threads", NULL, 0))
1956             av_dict_set(&ist->opts, "threads", "auto", 0);
1957         if ((ret = avcodec_open2(ist->st->codec, codec, &ist->opts)) < 0) {
1958             if (ret == AVERROR_EXPERIMENTAL)
1959                 abort_codec_experimental(codec, 0);
1960             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
1961                     ist->file_index, ist->st->index);
1962             return ret;
1963         }
1964         assert_avoptions(ist->opts);
1965     }
1966
1967     ist->next_pts = AV_NOPTS_VALUE;
1968     ist->next_dts = AV_NOPTS_VALUE;
1969     ist->is_start = 1;
1970
1971     return 0;
1972 }
1973
1974 static InputStream *get_input_stream(OutputStream *ost)
1975 {
1976     if (ost->source_index >= 0)
1977         return input_streams[ost->source_index];
1978     return NULL;
1979 }
1980
1981 static int compare_int64(const void *a, const void *b)
1982 {
1983     int64_t va = *(int64_t *)a, vb = *(int64_t *)b;
1984     return va < vb ? -1 : va > vb ? +1 : 0;
1985 }
1986
1987 static void parse_forced_key_frames(char *kf, OutputStream *ost,
1988                                     AVCodecContext *avctx)
1989 {
1990     char *p;
1991     int n = 1, i, size, index = 0;
1992     int64_t t, *pts;
1993
1994     for (p = kf; *p; p++)
1995         if (*p == ',')
1996             n++;
1997     size = n;
1998     pts = av_malloc(sizeof(*pts) * size);
1999     if (!pts) {
2000         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
2001         exit(1);
2002     }
2003
2004     p = kf;
2005     for (i = 0; i < n; i++) {
2006         char *next = strchr(p, ',');
2007
2008         if (next)
2009             *next++ = 0;
2010
2011         if (!memcmp(p, "chapters", 8)) {
2012
2013             AVFormatContext *avf = output_files[ost->file_index]->ctx;
2014             int j;
2015
2016             if (avf->nb_chapters > INT_MAX - size ||
2017                 !(pts = av_realloc_f(pts, size += avf->nb_chapters - 1,
2018                                      sizeof(*pts)))) {
2019                 av_log(NULL, AV_LOG_FATAL,
2020                        "Could not allocate forced key frames array.\n");
2021                 exit(1);
2022             }
2023             t = p[8] ? parse_time_or_die("force_key_frames", p + 8, 1) : 0;
2024             t = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2025
2026             for (j = 0; j < avf->nb_chapters; j++) {
2027                 AVChapter *c = avf->chapters[j];
2028                 av_assert1(index < size);
2029                 pts[index++] = av_rescale_q(c->start, c->time_base,
2030                                             avctx->time_base) + t;
2031             }
2032
2033         } else {
2034
2035             t = parse_time_or_die("force_key_frames", p, 1);
2036             av_assert1(index < size);
2037             pts[index++] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2038
2039         }
2040
2041         p = next;
2042     }
2043
2044     av_assert0(index == size);
2045     qsort(pts, size, sizeof(*pts), compare_int64);
2046     ost->forced_kf_count = size;
2047     ost->forced_kf_pts   = pts;
2048 }
2049
2050 static void report_new_stream(int input_index, AVPacket *pkt)
2051 {
2052     InputFile *file = input_files[input_index];
2053     AVStream *st = file->ctx->streams[pkt->stream_index];
2054
2055     if (pkt->stream_index < file->nb_streams_warn)
2056         return;
2057     av_log(file->ctx, AV_LOG_WARNING,
2058            "New %s stream %d:%d at pos:%"PRId64" and DTS:%ss\n",
2059            av_get_media_type_string(st->codec->codec_type),
2060            input_index, pkt->stream_index,
2061            pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
2062     file->nb_streams_warn = pkt->stream_index + 1;
2063 }
2064
2065 static int transcode_init(void)
2066 {
2067     int ret = 0, i, j, k;
2068     AVFormatContext *oc;
2069     AVCodecContext *codec;
2070     OutputStream *ost;
2071     InputStream *ist;
2072     char error[1024];
2073     int want_sdp = 1;
2074
2075     /* init framerate emulation */
2076     for (i = 0; i < nb_input_files; i++) {
2077         InputFile *ifile = input_files[i];
2078         if (ifile->rate_emu)
2079             for (j = 0; j < ifile->nb_streams; j++)
2080                 input_streams[j + ifile->ist_index]->start = av_gettime();
2081     }
2082
2083     /* output stream init */
2084     for (i = 0; i < nb_output_files; i++) {
2085         oc = output_files[i]->ctx;
2086         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2087             av_dump_format(oc, i, oc->filename, 1);
2088             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2089             return AVERROR(EINVAL);
2090         }
2091     }
2092
2093     /* init complex filtergraphs */
2094     for (i = 0; i < nb_filtergraphs; i++)
2095         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2096             return ret;
2097
2098     /* for each output stream, we compute the right encoding parameters */
2099     for (i = 0; i < nb_output_streams; i++) {
2100         AVCodecContext *icodec = NULL;
2101         ost = output_streams[i];
2102         oc  = output_files[ost->file_index]->ctx;
2103         ist = get_input_stream(ost);
2104
2105         if (ost->attachment_filename)
2106             continue;
2107
2108         codec  = ost->st->codec;
2109
2110         if (ist) {
2111             icodec = ist->st->codec;
2112
2113             ost->st->disposition          = ist->st->disposition;
2114             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2115             codec->chroma_sample_location = icodec->chroma_sample_location;
2116         }
2117
2118         if (ost->stream_copy) {
2119             uint64_t extra_size;
2120
2121             av_assert0(ist && !ost->filter);
2122
2123             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2124
2125             if (extra_size > INT_MAX) {
2126                 return AVERROR(EINVAL);
2127             }
2128
2129             /* if stream_copy is selected, no need to decode or encode */
2130             codec->codec_id   = icodec->codec_id;
2131             codec->codec_type = icodec->codec_type;
2132
2133             if (!codec->codec_tag) {
2134                 unsigned int codec_tag;
2135                 if (!oc->oformat->codec_tag ||
2136                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2137                      !av_codec_get_tag2(oc->oformat->codec_tag, icodec->codec_id, &codec_tag))
2138                     codec->codec_tag = icodec->codec_tag;
2139             }
2140
2141             codec->bit_rate       = icodec->bit_rate;
2142             codec->rc_max_rate    = icodec->rc_max_rate;
2143             codec->rc_buffer_size = icodec->rc_buffer_size;
2144             codec->field_order    = icodec->field_order;
2145             codec->extradata      = av_mallocz(extra_size);
2146             if (!codec->extradata) {
2147                 return AVERROR(ENOMEM);
2148             }
2149             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2150             codec->extradata_size= icodec->extradata_size;
2151             codec->bits_per_coded_sample  = icodec->bits_per_coded_sample;
2152
2153             codec->time_base = ist->st->time_base;
2154             /*
2155              * Avi is a special case here because it supports variable fps but
2156              * having the fps and timebase differe significantly adds quite some
2157              * overhead
2158              */
2159             if(!strcmp(oc->oformat->name, "avi")) {
2160                 if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
2161                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
2162                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(icodec->time_base)
2163                                && av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(icodec->time_base) < 1.0/500
2164                      || copy_tb==2){
2165                     codec->time_base.num = ist->st->r_frame_rate.den;
2166                     codec->time_base.den = 2*ist->st->r_frame_rate.num;
2167                     codec->ticks_per_frame = 2;
2168                 } else if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2169                                  && av_q2d(ist->st->time_base) < 1.0/500
2170                     || copy_tb==0){
2171                     codec->time_base = icodec->time_base;
2172                     codec->time_base.num *= icodec->ticks_per_frame;
2173                     codec->time_base.den *= 2;
2174                     codec->ticks_per_frame = 2;
2175                 }
2176             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2177                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2178                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2179                       && strcmp(oc->oformat->name, "f4v")
2180             ) {
2181                 if(   copy_tb<0 && icodec->time_base.den
2182                                 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
2183                                 && av_q2d(ist->st->time_base) < 1.0/500
2184                    || copy_tb==0){
2185                     codec->time_base = icodec->time_base;
2186                     codec->time_base.num *= icodec->ticks_per_frame;
2187                 }
2188             }
2189             if (   codec->codec_tag == AV_RL32("tmcd")
2190                 && icodec->time_base.num < icodec->time_base.den
2191                 && icodec->time_base.num > 0
2192                 && 121LL*icodec->time_base.num > icodec->time_base.den) {
2193                 codec->time_base = icodec->time_base;
2194             }
2195
2196             if (ist && !ost->frame_rate.num)
2197                 ost->frame_rate = ist->framerate;
2198             if(ost->frame_rate.num)
2199                 codec->time_base = av_inv_q(ost->frame_rate);
2200
2201             av_reduce(&codec->time_base.num, &codec->time_base.den,
2202                         codec->time_base.num, codec->time_base.den, INT_MAX);
2203
2204             switch (codec->codec_type) {
2205             case AVMEDIA_TYPE_AUDIO:
2206                 if (audio_volume != 256) {
2207                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2208                     exit(1);
2209                 }
2210                 codec->channel_layout     = icodec->channel_layout;
2211                 codec->sample_rate        = icodec->sample_rate;
2212                 codec->channels           = icodec->channels;
2213                 codec->frame_size         = icodec->frame_size;
2214                 codec->audio_service_type = icodec->audio_service_type;
2215                 codec->block_align        = icodec->block_align;
2216                 if((codec->block_align == 1 || codec->block_align == 1152 || codec->block_align == 576) && codec->codec_id == AV_CODEC_ID_MP3)
2217                     codec->block_align= 0;
2218                 if(codec->codec_id == AV_CODEC_ID_AC3)
2219                     codec->block_align= 0;
2220                 break;
2221             case AVMEDIA_TYPE_VIDEO:
2222                 codec->pix_fmt            = icodec->pix_fmt;
2223                 codec->width              = icodec->width;
2224                 codec->height             = icodec->height;
2225                 codec->has_b_frames       = icodec->has_b_frames;
2226                 if (ost->frame_aspect_ratio.num) { // overridden by the -aspect cli option
2227                     codec->sample_aspect_ratio   =
2228                     ost->st->sample_aspect_ratio =
2229                         av_mul_q(ost->frame_aspect_ratio,
2230                                  (AVRational){ codec->height, codec->width });
2231                     av_log(NULL, AV_LOG_WARNING, "Overriding aspect ratio "
2232                            "with stream copy may produce invalid files\n");
2233                 } else if (!codec->sample_aspect_ratio.num) {
2234                     codec->sample_aspect_ratio   =
2235                     ost->st->sample_aspect_ratio =
2236                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2237                         ist->st->codec->sample_aspect_ratio.num ?
2238                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2239                 }
2240                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2241                 break;
2242             case AVMEDIA_TYPE_SUBTITLE:
2243                 codec->width  = icodec->width;
2244                 codec->height = icodec->height;
2245                 break;
2246             case AVMEDIA_TYPE_DATA:
2247             case AVMEDIA_TYPE_ATTACHMENT:
2248                 break;
2249             default:
2250                 abort();
2251             }
2252         } else {
2253             if (!ost->enc)
2254                 ost->enc = avcodec_find_encoder(codec->codec_id);
2255             if (!ost->enc) {
2256                 /* should only happen when a default codec is not present. */
2257                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
2258                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
2259                 ret = AVERROR(EINVAL);
2260                 goto dump_format;
2261             }
2262
2263             if (ist)
2264                 ist->decoding_needed++;
2265             ost->encoding_needed = 1;
2266
2267             if (!ost->filter &&
2268                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2269                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2270                     FilterGraph *fg;
2271                     fg = init_simple_filtergraph(ist, ost);
2272                     if (configure_filtergraph(fg)) {
2273                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2274                         exit(1);
2275                     }
2276             }
2277
2278             if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2279                 if (ost->filter && !ost->frame_rate.num)
2280                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
2281                 if (ist && !ost->frame_rate.num)
2282                     ost->frame_rate = ist->framerate;
2283                 if (ist && !ost->frame_rate.num)
2284                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
2285 //                    ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
2286                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2287                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2288                     ost->frame_rate = ost->enc->supported_framerates[idx];
2289                 }
2290             }
2291
2292             switch (codec->codec_type) {
2293             case AVMEDIA_TYPE_AUDIO:
2294                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2295                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2296                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2297                 codec->channels       = avfilter_link_get_channels(ost->filter->filter->inputs[0]);
2298                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2299                 break;
2300             case AVMEDIA_TYPE_VIDEO:
2301                 codec->time_base = av_inv_q(ost->frame_rate);
2302                 if (ost->filter && !(codec->time_base.num && codec->time_base.den))
2303                     codec->time_base = ost->filter->filter->inputs[0]->time_base;
2304                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
2305                    && (video_sync_method == VSYNC_CFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
2306                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
2307                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
2308                 }
2309                 for (j = 0; j < ost->forced_kf_count; j++)
2310                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
2311                                                          AV_TIME_BASE_Q,
2312                                                          codec->time_base);
2313
2314                 codec->width  = ost->filter->filter->inputs[0]->w;
2315                 codec->height = ost->filter->filter->inputs[0]->h;
2316                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2317                     ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option
2318                     av_mul_q(ost->frame_aspect_ratio, (AVRational){ codec->height, codec->width }) :
2319                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2320                 if (!strncmp(ost->enc->name, "libx264", 7) &&
2321                     codec->pix_fmt == AV_PIX_FMT_NONE &&
2322                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2323                     av_log(NULL, AV_LOG_INFO,
2324                            "No pixel format specified, %s for H.264 encoding chosen.\n"
2325                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2326                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2327                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2328
2329                 if (!icodec ||
2330                     codec->width   != icodec->width  ||
2331                     codec->height  != icodec->height ||
2332                     codec->pix_fmt != icodec->pix_fmt) {
2333                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
2334                 }
2335
2336                 if (ost->forced_keyframes) {
2337                     if (!strncmp(ost->forced_keyframes, "expr:", 5)) {
2338                         ret = av_expr_parse(&ost->forced_keyframes_pexpr, ost->forced_keyframes+5,
2339                                             forced_keyframes_const_names, NULL, NULL, NULL, NULL, 0, NULL);
2340                         if (ret < 0) {
2341                             av_log(NULL, AV_LOG_ERROR,
2342                                    "Invalid force_key_frames expression '%s'\n", ost->forced_keyframes+5);
2343                             return ret;
2344                         }
2345                         ost->forced_keyframes_expr_const_values[FKF_N] = 0;
2346                         ost->forced_keyframes_expr_const_values[FKF_N_FORCED] = 0;
2347                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] = NAN;
2348                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] = NAN;
2349                     } else {
2350                         parse_forced_key_frames(ost->forced_keyframes, ost, ost->st->codec);
2351                     }
2352                 }
2353                 break;
2354             case AVMEDIA_TYPE_SUBTITLE:
2355                 codec->time_base = (AVRational){1, 1000};
2356                 if (!codec->width) {
2357                     codec->width     = input_streams[ost->source_index]->st->codec->width;
2358                     codec->height    = input_streams[ost->source_index]->st->codec->height;
2359                 }
2360                 break;
2361             default:
2362                 abort();
2363                 break;
2364             }
2365             /* two pass mode */
2366             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
2367                 char logfilename[1024];
2368                 FILE *f;
2369
2370                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2371                          ost->logfile_prefix ? ost->logfile_prefix :
2372                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
2373                          i);
2374                 if (!strcmp(ost->enc->name, "libx264")) {
2375                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2376                 } else {
2377                     if (codec->flags & CODEC_FLAG_PASS2) {
2378                         char  *logbuffer;
2379                         size_t logbuffer_size;
2380                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2381                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2382                                    logfilename);
2383                             exit(1);
2384                         }
2385                         codec->stats_in = logbuffer;
2386                     }
2387                     if (codec->flags & CODEC_FLAG_PASS1) {
2388                         f = fopen(logfilename, "wb");
2389                         if (!f) {
2390                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2391                                 logfilename, strerror(errno));
2392                             exit(1);
2393                         }
2394                         ost->logfile = f;
2395                     }
2396                 }
2397             }
2398         }
2399     }
2400
2401     /* open each encoder */
2402     for (i = 0; i < nb_output_streams; i++) {
2403         ost = output_streams[i];
2404         if (ost->encoding_needed) {
2405             AVCodec      *codec = ost->enc;
2406             AVCodecContext *dec = NULL;
2407
2408             if ((ist = get_input_stream(ost)))
2409                 dec = ist->st->codec;
2410             if (dec && dec->subtitle_header) {
2411                 /* ASS code assumes this buffer is null terminated so add extra byte. */
2412                 ost->st->codec->subtitle_header = av_mallocz(dec->subtitle_header_size + 1);
2413                 if (!ost->st->codec->subtitle_header) {
2414                     ret = AVERROR(ENOMEM);
2415                     goto dump_format;
2416                 }
2417                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2418                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2419             }
2420             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2421                 av_dict_set(&ost->opts, "threads", "auto", 0);
2422             if ((ret = avcodec_open2(ost->st->codec, codec, &ost->opts)) < 0) {
2423                 if (ret == AVERROR_EXPERIMENTAL)
2424                     abort_codec_experimental(codec, 1);
2425                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2426                         ost->file_index, ost->index);
2427                 goto dump_format;
2428             }
2429             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2430                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
2431                 av_buffersink_set_frame_size(ost->filter->filter,
2432                                              ost->st->codec->frame_size);
2433             assert_avoptions(ost->opts);
2434             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2435                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2436                                              " It takes bits/s as argument, not kbits/s\n");
2437             extra_size += ost->st->codec->extradata_size;
2438
2439             if (ost->st->codec->me_threshold)
2440                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
2441         } else {
2442             av_opt_set_dict(ost->st->codec, &ost->opts);
2443         }
2444     }
2445
2446     /* init input streams */
2447     for (i = 0; i < nb_input_streams; i++)
2448         if ((ret = init_input_stream(i, error, sizeof(error))) < 0) {
2449             for (i = 0; i < nb_output_streams; i++) {
2450                 ost = output_streams[i];
2451                 avcodec_close(ost->st->codec);
2452             }
2453             goto dump_format;
2454         }
2455
2456     /* discard unused programs */
2457     for (i = 0; i < nb_input_files; i++) {
2458         InputFile *ifile = input_files[i];
2459         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2460             AVProgram *p = ifile->ctx->programs[j];
2461             int discard  = AVDISCARD_ALL;
2462
2463             for (k = 0; k < p->nb_stream_indexes; k++)
2464                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
2465                     discard = AVDISCARD_DEFAULT;
2466                     break;
2467                 }
2468             p->discard = discard;
2469         }
2470     }
2471
2472     /* open files and write file headers */
2473     for (i = 0; i < nb_output_files; i++) {
2474         oc = output_files[i]->ctx;
2475         oc->interrupt_callback = int_cb;
2476         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
2477             char errbuf[128];
2478             const char *errbuf_ptr = errbuf;
2479             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
2480                 errbuf_ptr = strerror(AVUNERROR(ret));
2481             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
2482             ret = AVERROR(EINVAL);
2483             goto dump_format;
2484         }
2485 //         assert_avoptions(output_files[i]->opts);
2486         if (strcmp(oc->oformat->name, "rtp")) {
2487             want_sdp = 0;
2488         }
2489     }
2490
2491  dump_format:
2492     /* dump the file output parameters - cannot be done before in case
2493        of stream copy */
2494     for (i = 0; i < nb_output_files; i++) {
2495         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
2496     }
2497
2498     /* dump the stream mapping */
2499     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2500     for (i = 0; i < nb_input_streams; i++) {
2501         ist = input_streams[i];
2502
2503         for (j = 0; j < ist->nb_filters; j++) {
2504             if (ist->filters[j]->graph->graph_desc) {
2505                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
2506                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
2507                        ist->filters[j]->name);
2508                 if (nb_filtergraphs > 1)
2509                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
2510                 av_log(NULL, AV_LOG_INFO, "\n");
2511             }
2512         }
2513     }
2514
2515     for (i = 0; i < nb_output_streams; i++) {
2516         ost = output_streams[i];
2517
2518         if (ost->attachment_filename) {
2519             /* an attached file */
2520             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2521                    ost->attachment_filename, ost->file_index, ost->index);
2522             continue;
2523         }
2524
2525         if (ost->filter && ost->filter->graph->graph_desc) {
2526             /* output from a complex graph */
2527             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
2528             if (nb_filtergraphs > 1)
2529                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
2530
2531             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
2532                    ost->index, ost->enc ? ost->enc->name : "?");
2533             continue;
2534         }
2535
2536         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2537                input_streams[ost->source_index]->file_index,
2538                input_streams[ost->source_index]->st->index,
2539                ost->file_index,
2540                ost->index);
2541         if (ost->sync_ist != input_streams[ost->source_index])
2542             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2543                    ost->sync_ist->file_index,
2544                    ost->sync_ist->st->index);
2545         if (ost->stream_copy)
2546             av_log(NULL, AV_LOG_INFO, " (copy)");
2547         else
2548             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
2549                    input_streams[ost->source_index]->dec->name : "?",
2550                    ost->enc ? ost->enc->name : "?");
2551         av_log(NULL, AV_LOG_INFO, "\n");
2552     }
2553
2554     if (ret) {
2555         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2556         return ret;
2557     }
2558
2559     if (want_sdp) {
2560         print_sdp();
2561     }
2562
2563     return 0;
2564 }
2565
2566 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
2567 static int need_output(void)
2568 {
2569     int i;
2570
2571     for (i = 0; i < nb_output_streams; i++) {
2572         OutputStream *ost    = output_streams[i];
2573         OutputFile *of       = output_files[ost->file_index];
2574         AVFormatContext *os  = output_files[ost->file_index]->ctx;
2575
2576         if (ost->finished ||
2577             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2578             continue;
2579         if (ost->frame_number >= ost->max_frames) {
2580             int j;
2581             for (j = 0; j < of->ctx->nb_streams; j++)
2582                 close_output_stream(output_streams[of->ost_index + j]);
2583             continue;
2584         }
2585
2586         return 1;
2587     }
2588
2589     return 0;
2590 }
2591
2592 /**
2593  * Select the output stream to process.
2594  *
2595  * @return  selected output stream, or NULL if none available
2596  */
2597 static OutputStream *choose_output(void)
2598 {
2599     int i;
2600     int64_t opts_min = INT64_MAX;
2601     OutputStream *ost_min = NULL;
2602
2603     for (i = 0; i < nb_output_streams; i++) {
2604         OutputStream *ost = output_streams[i];
2605         int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
2606                                     AV_TIME_BASE_Q);
2607         if (!ost->unavailable && !ost->finished && opts < opts_min) {
2608             opts_min = opts;
2609             ost_min  = ost;
2610         }
2611     }
2612     return ost_min;
2613 }
2614
2615 static int check_keyboard_interaction(int64_t cur_time)
2616 {
2617     int i, ret, key;
2618     static int64_t last_time;
2619     if (received_nb_signals)
2620         return AVERROR_EXIT;
2621     /* read_key() returns 0 on EOF */
2622     if(cur_time - last_time >= 100000 && !run_as_daemon){
2623         key =  read_key();
2624         last_time = cur_time;
2625     }else
2626         key = -1;
2627     if (key == 'q')
2628         return AVERROR_EXIT;
2629     if (key == '+') av_log_set_level(av_log_get_level()+10);
2630     if (key == '-') av_log_set_level(av_log_get_level()-10);
2631     if (key == 's') qp_hist     ^= 1;
2632     if (key == 'h'){
2633         if (do_hex_dump){
2634             do_hex_dump = do_pkt_dump = 0;
2635         } else if(do_pkt_dump){
2636             do_hex_dump = 1;
2637         } else
2638             do_pkt_dump = 1;
2639         av_log_set_level(AV_LOG_DEBUG);
2640     }
2641     if (key == 'c' || key == 'C'){
2642         char buf[4096], target[64], command[256], arg[256] = {0};
2643         double time;
2644         int k, n = 0;
2645         fprintf(stderr, "\nEnter command: <target> <time> <command>[ <argument>]\n");
2646         i = 0;
2647         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
2648             if (k > 0)
2649                 buf[i++] = k;
2650         buf[i] = 0;
2651         if (k > 0 &&
2652             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
2653             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
2654                    target, time, command, arg);
2655             for (i = 0; i < nb_filtergraphs; i++) {
2656                 FilterGraph *fg = filtergraphs[i];
2657                 if (fg->graph) {
2658                     if (time < 0) {
2659                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
2660                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
2661                         fprintf(stderr, "Command reply for stream %d: ret:%d res:%s\n", i, ret, buf);
2662                     } else {
2663                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
2664                     }
2665                 }
2666             }
2667         } else {
2668             av_log(NULL, AV_LOG_ERROR,
2669                    "Parse error, at least 3 arguments were expected, "
2670                    "only %d given in string '%s'\n", n, buf);
2671         }
2672     }
2673     if (key == 'd' || key == 'D'){
2674         int debug=0;
2675         if(key == 'D') {
2676             debug = input_streams[0]->st->codec->debug<<1;
2677             if(!debug) debug = 1;
2678             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
2679                 debug += debug;
2680         }else
2681             if(scanf("%d", &debug)!=1)
2682                 fprintf(stderr,"error parsing debug value\n");
2683         for(i=0;i<nb_input_streams;i++) {
2684             input_streams[i]->st->codec->debug = debug;
2685         }
2686         for(i=0;i<nb_output_streams;i++) {
2687             OutputStream *ost = output_streams[i];
2688             ost->st->codec->debug = debug;
2689         }
2690         if(debug) av_log_set_level(AV_LOG_DEBUG);
2691         fprintf(stderr,"debug=%d\n", debug);
2692     }
2693     if (key == '?'){
2694         fprintf(stderr, "key    function\n"
2695                         "?      show this help\n"
2696                         "+      increase verbosity\n"
2697                         "-      decrease verbosity\n"
2698                         "c      Send command to filtergraph\n"
2699                         "D      cycle through available debug modes\n"
2700                         "h      dump packets/hex press to cycle through the 3 states\n"
2701                         "q      quit\n"
2702                         "s      Show QP histogram\n"
2703         );
2704     }
2705     return 0;
2706 }
2707
2708 #if HAVE_PTHREADS
2709 static void *input_thread(void *arg)
2710 {
2711     InputFile *f = arg;
2712     int ret = 0;
2713
2714     while (!transcoding_finished && ret >= 0) {
2715         AVPacket pkt;
2716         ret = av_read_frame(f->ctx, &pkt);
2717
2718         if (ret == AVERROR(EAGAIN)) {
2719             av_usleep(10000);
2720             ret = 0;
2721             continue;
2722         } else if (ret < 0)
2723             break;
2724
2725         pthread_mutex_lock(&f->fifo_lock);
2726         while (!av_fifo_space(f->fifo))
2727             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2728
2729         av_dup_packet(&pkt);
2730         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2731
2732         pthread_mutex_unlock(&f->fifo_lock);
2733     }
2734
2735     f->finished = 1;
2736     return NULL;
2737 }
2738
2739 static void free_input_threads(void)
2740 {
2741     int i;
2742
2743     if (nb_input_files == 1)
2744         return;
2745
2746     transcoding_finished = 1;
2747
2748     for (i = 0; i < nb_input_files; i++) {
2749         InputFile *f = input_files[i];
2750         AVPacket pkt;
2751
2752         if (!f->fifo || f->joined)
2753             continue;
2754
2755         pthread_mutex_lock(&f->fifo_lock);
2756         while (av_fifo_size(f->fifo)) {
2757             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2758             av_free_packet(&pkt);
2759         }
2760         pthread_cond_signal(&f->fifo_cond);
2761         pthread_mutex_unlock(&f->fifo_lock);
2762
2763         pthread_join(f->thread, NULL);
2764         f->joined = 1;
2765
2766         while (av_fifo_size(f->fifo)) {
2767             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2768             av_free_packet(&pkt);
2769         }
2770         av_fifo_free(f->fifo);
2771     }
2772 }
2773
2774 static int init_input_threads(void)
2775 {
2776     int i, ret;
2777
2778     if (nb_input_files == 1)
2779         return 0;
2780
2781     for (i = 0; i < nb_input_files; i++) {
2782         InputFile *f = input_files[i];
2783
2784         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2785             return AVERROR(ENOMEM);
2786
2787         pthread_mutex_init(&f->fifo_lock, NULL);
2788         pthread_cond_init (&f->fifo_cond, NULL);
2789
2790         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2791             return AVERROR(ret);
2792     }
2793     return 0;
2794 }
2795
2796 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2797 {
2798     int ret = 0;
2799
2800     pthread_mutex_lock(&f->fifo_lock);
2801
2802     if (av_fifo_size(f->fifo)) {
2803         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2804         pthread_cond_signal(&f->fifo_cond);
2805     } else {
2806         if (f->finished)
2807             ret = AVERROR_EOF;
2808         else
2809             ret = AVERROR(EAGAIN);
2810     }
2811
2812     pthread_mutex_unlock(&f->fifo_lock);
2813
2814     return ret;
2815 }
2816 #endif
2817
2818 static int get_input_packet(InputFile *f, AVPacket *pkt)
2819 {
2820 #if HAVE_PTHREADS
2821     if (nb_input_files > 1)
2822         return get_input_packet_mt(f, pkt);
2823 #endif
2824     return av_read_frame(f->ctx, pkt);
2825 }
2826
2827 static int got_eagain(void)
2828 {
2829     int i;
2830     for (i = 0; i < nb_output_streams; i++)
2831         if (output_streams[i]->unavailable)
2832             return 1;
2833     return 0;
2834 }
2835
2836 static void reset_eagain(void)
2837 {
2838     int i;
2839     for (i = 0; i < nb_input_files; i++)
2840         input_files[i]->eagain = 0;
2841     for (i = 0; i < nb_output_streams; i++)
2842         output_streams[i]->unavailable = 0;
2843 }
2844
2845 /*
2846  * Return
2847  * - 0 -- one packet was read and processed
2848  * - AVERROR(EAGAIN) -- no packets were available for selected file,
2849  *   this function should be called again
2850  * - AVERROR_EOF -- this function should not be called again
2851  */
2852 static int process_input(int file_index)
2853 {
2854     InputFile *ifile = input_files[file_index];
2855     AVFormatContext *is;
2856     InputStream *ist;
2857     AVPacket pkt;
2858     int ret, i, j;
2859
2860     is  = ifile->ctx;
2861     ret = get_input_packet(ifile, &pkt);
2862
2863     if (ret == AVERROR(EAGAIN)) {
2864         ifile->eagain = 1;
2865         return ret;
2866     }
2867     if (ret < 0) {
2868         if (ret != AVERROR_EOF) {
2869             print_error(is->filename, ret);
2870             if (exit_on_error)
2871                 exit(1);
2872         }
2873         ifile->eof_reached = 1;
2874
2875         for (i = 0; i < ifile->nb_streams; i++) {
2876             ist = input_streams[ifile->ist_index + i];
2877             if (ist->decoding_needed)
2878                 output_packet(ist, NULL);
2879
2880             /* mark all outputs that don't go through lavfi as finished */
2881             for (j = 0; j < nb_output_streams; j++) {
2882                 OutputStream *ost = output_streams[j];
2883
2884                 if (ost->source_index == ifile->ist_index + i &&
2885                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
2886                     close_output_stream(ost);
2887             }
2888         }
2889
2890         return AVERROR(EAGAIN);
2891     }
2892
2893     reset_eagain();
2894
2895     if (do_pkt_dump) {
2896         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2897                          is->streams[pkt.stream_index]);
2898     }
2899     /* the following test is needed in case new streams appear
2900        dynamically in stream : we ignore them */
2901     if (pkt.stream_index >= ifile->nb_streams) {
2902         report_new_stream(file_index, &pkt);
2903         goto discard_packet;
2904     }
2905
2906     ist = input_streams[ifile->ist_index + pkt.stream_index];
2907     if (ist->discard)
2908         goto discard_packet;
2909
2910     if (debug_ts) {
2911         av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
2912                "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",
2913                ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->st->codec->codec_type),
2914                av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &AV_TIME_BASE_Q),
2915                av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &AV_TIME_BASE_Q),
2916                av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
2917                av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
2918                av_ts2str(input_files[ist->file_index]->ts_offset),
2919                av_ts2timestr(input_files[ist->file_index]->ts_offset, &AV_TIME_BASE_Q));
2920     }
2921
2922     if(!ist->wrap_correction_done && is->start_time != AV_NOPTS_VALUE && ist->st->pts_wrap_bits < 64){
2923         int64_t stime, stime2;
2924         // Correcting starttime based on the enabled streams
2925         // FIXME this ideally should be done before the first use of starttime but we do not know which are the enabled streams at that point.
2926         //       so we instead do it here as part of discontinuity handling
2927         if (   ist->next_dts == AV_NOPTS_VALUE
2928             && ifile->ts_offset == -is->start_time
2929             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
2930             int64_t new_start_time = INT64_MAX;
2931             for (i=0; i<is->nb_streams; i++) {
2932                 AVStream *st = is->streams[i];
2933                 if(st->discard == AVDISCARD_ALL || st->start_time == AV_NOPTS_VALUE)
2934                     continue;
2935                 new_start_time = FFMIN(new_start_time, av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q));
2936             }
2937             if (new_start_time > is->start_time) {
2938                 av_log(is, AV_LOG_VERBOSE, "Correcting start time by %"PRId64"\n", new_start_time - is->start_time);
2939                 ifile->ts_offset = -new_start_time;
2940             }
2941         }
2942
2943         stime = av_rescale_q(is->start_time, AV_TIME_BASE_Q, ist->st->time_base);
2944         stime2= stime + (1ULL<<ist->st->pts_wrap_bits);
2945         ist->wrap_correction_done = 1;
2946
2947         if(stime2 > stime && pkt.dts != AV_NOPTS_VALUE && pkt.dts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
2948             pkt.dts -= 1ULL<<ist->st->pts_wrap_bits;
2949             ist->wrap_correction_done = 0;
2950         }
2951         if(stime2 > stime && pkt.pts != AV_NOPTS_VALUE && pkt.pts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
2952             pkt.pts -= 1ULL<<ist->st->pts_wrap_bits;
2953             ist->wrap_correction_done = 0;
2954         }
2955     }
2956
2957     if (pkt.dts != AV_NOPTS_VALUE)
2958         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2959     if (pkt.pts != AV_NOPTS_VALUE)
2960         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2961
2962     if (pkt.pts != AV_NOPTS_VALUE)
2963         pkt.pts *= ist->ts_scale;
2964     if (pkt.dts != AV_NOPTS_VALUE)
2965         pkt.dts *= ist->ts_scale;
2966
2967     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts == AV_NOPTS_VALUE && !copy_ts
2968         && (is->iformat->flags & AVFMT_TS_DISCONT) && ifile->last_ts != AV_NOPTS_VALUE) {
2969         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2970         int64_t delta   = pkt_dts - ifile->last_ts;
2971         if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
2972             (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
2973                 ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)){
2974             ifile->ts_offset -= delta;
2975             av_log(NULL, AV_LOG_DEBUG,
2976                    "Inter stream timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2977                    delta, ifile->ts_offset);
2978             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2979             if (pkt.pts != AV_NOPTS_VALUE)
2980                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2981         }
2982     }
2983
2984     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
2985         !copy_ts) {
2986         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2987         int64_t delta   = pkt_dts - ist->next_dts;
2988         if (is->iformat->flags & AVFMT_TS_DISCONT) {
2989         if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
2990             (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
2991                 ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
2992             pkt_dts+1<ist->pts){
2993             ifile->ts_offset -= delta;
2994             av_log(NULL, AV_LOG_DEBUG,
2995                    "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2996                    delta, ifile->ts_offset);
2997             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2998             if (pkt.pts != AV_NOPTS_VALUE)
2999                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3000         }
3001         } else {
3002             if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3003                 (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
3004                ) {
3005                 av_log(NULL, AV_LOG_WARNING, "DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n", pkt.dts, ist->next_dts, pkt.stream_index);
3006                 pkt.dts = AV_NOPTS_VALUE;
3007             }
3008             if (pkt.pts != AV_NOPTS_VALUE){
3009                 int64_t pkt_pts = av_rescale_q(pkt.pts, ist->st->time_base, AV_TIME_BASE_Q);
3010                 delta   = pkt_pts - ist->next_dts;
3011                 if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3012                     (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
3013                    ) {
3014                     av_log(NULL, AV_LOG_WARNING, "PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n", pkt.pts, ist->next_dts, pkt.stream_index);
3015                     pkt.pts = AV_NOPTS_VALUE;
3016                 }
3017             }
3018         }
3019     }
3020
3021     if (pkt.dts != AV_NOPTS_VALUE)
3022         ifile->last_ts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3023
3024     if (debug_ts) {
3025         av_log(NULL, AV_LOG_INFO, "demuxer+ffmpeg -> ist_index:%d type:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%s off_time:%s\n",
3026                ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->st->codec->codec_type),
3027                av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3028                av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3029                av_ts2str(input_files[ist->file_index]->ts_offset),
3030                av_ts2timestr(input_files[ist->file_index]->ts_offset, &AV_TIME_BASE_Q));
3031     }
3032
3033     sub2video_heartbeat(ist, pkt.pts);
3034
3035     ret = output_packet(ist, &pkt);
3036     if (ret < 0) {
3037         char buf[128];
3038         av_strerror(ret, buf, sizeof(buf));
3039         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d: %s\n",
3040                 ist->file_index, ist->st->index, buf);
3041         if (exit_on_error)
3042             exit(1);
3043     }
3044
3045 discard_packet:
3046     av_free_packet(&pkt);
3047
3048     return 0;
3049 }
3050
3051 /**
3052  * Perform a step of transcoding for the specified filter graph.
3053  *
3054  * @param[in]  graph     filter graph to consider
3055  * @param[out] best_ist  input stream where a frame would allow to continue
3056  * @return  0 for success, <0 for error
3057  */
3058 static int transcode_from_filter(FilterGraph *graph, InputStream **best_ist)
3059 {
3060     int i, ret;
3061     int nb_requests, nb_requests_max = 0;
3062     InputFilter *ifilter;
3063     InputStream *ist;
3064
3065     *best_ist = NULL;
3066     ret = avfilter_graph_request_oldest(graph->graph);
3067     if (ret >= 0)
3068         return reap_filters();
3069
3070     if (ret == AVERROR_EOF) {
3071         ret = reap_filters();
3072         for (i = 0; i < graph->nb_outputs; i++)
3073             close_output_stream(graph->outputs[i]->ost);
3074         return ret;
3075     }
3076     if (ret != AVERROR(EAGAIN))
3077         return ret;
3078
3079     for (i = 0; i < graph->nb_inputs; i++) {
3080         ifilter = graph->inputs[i];
3081         ist = ifilter->ist;
3082         if (input_files[ist->file_index]->eagain ||
3083             input_files[ist->file_index]->eof_reached)
3084             continue;
3085         nb_requests = av_buffersrc_get_nb_failed_requests(ifilter->filter);
3086         if (nb_requests > nb_requests_max) {
3087             nb_requests_max = nb_requests;
3088             *best_ist = ist;
3089         }
3090     }
3091
3092     if (!*best_ist)
3093         for (i = 0; i < graph->nb_outputs; i++)
3094             graph->outputs[i]->ost->unavailable = 1;
3095
3096     return 0;
3097 }
3098
3099 /**
3100  * Run a single step of transcoding.
3101  *
3102  * @return  0 for success, <0 for error
3103  */
3104 static int transcode_step(void)
3105 {
3106     OutputStream *ost;
3107     InputStream  *ist;
3108     int ret;
3109
3110     ost = choose_output();
3111     if (!ost) {
3112         if (got_eagain()) {
3113             reset_eagain();
3114             av_usleep(10000);
3115             return 0;
3116         }
3117         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
3118         return AVERROR_EOF;
3119     }
3120
3121     if (ost->filter) {
3122         if ((ret = transcode_from_filter(ost->filter->graph, &ist)) < 0)
3123             return ret;
3124         if (!ist)
3125             return 0;
3126     } else {
3127         av_assert0(ost->source_index >= 0);
3128         ist = input_streams[ost->source_index];
3129     }
3130
3131     ret = process_input(ist->file_index);
3132     if (ret == AVERROR(EAGAIN)) {
3133         if (input_files[ist->file_index]->eagain)
3134             ost->unavailable = 1;
3135         return 0;
3136     }
3137     if (ret < 0)
3138         return ret == AVERROR_EOF ? 0 : ret;
3139
3140     return reap_filters();
3141 }
3142
3143 /*
3144  * The following code is the main loop of the file converter
3145  */
3146 static int transcode(void)
3147 {
3148     int ret, i;
3149     AVFormatContext *os;
3150     OutputStream *ost;
3151     InputStream *ist;
3152     int64_t timer_start;
3153
3154     ret = transcode_init();
3155     if (ret < 0)
3156         goto fail;
3157
3158     if (stdin_interaction) {
3159         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
3160     }
3161
3162     timer_start = av_gettime();
3163
3164 #if HAVE_PTHREADS
3165     if ((ret = init_input_threads()) < 0)
3166         goto fail;
3167 #endif
3168
3169     while (!received_sigterm) {
3170         int64_t cur_time= av_gettime();
3171
3172         /* if 'q' pressed, exits */
3173         if (stdin_interaction)
3174             if (check_keyboard_interaction(cur_time) < 0)
3175                 break;
3176
3177         /* check if there's any stream where output is still needed */
3178         if (!need_output()) {
3179             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
3180             break;
3181         }
3182
3183         ret = transcode_step();
3184         if (ret < 0) {
3185             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
3186                 continue;
3187
3188             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
3189             break;
3190         }
3191
3192         /* dump report by using the output first video and audio streams */
3193         print_report(0, timer_start, cur_time);
3194     }
3195 #if HAVE_PTHREADS
3196     free_input_threads();
3197 #endif
3198
3199     /* at the end of stream, we must flush the decoder buffers */
3200     for (i = 0; i < nb_input_streams; i++) {
3201         ist = input_streams[i];
3202         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3203             output_packet(ist, NULL);
3204         }
3205     }
3206     flush_encoders();
3207
3208     term_exit();
3209
3210     /* write the trailer if needed and close file */
3211     for (i = 0; i < nb_output_files; i++) {
3212         os = output_files[i]->ctx;
3213         av_write_trailer(os);
3214     }
3215
3216     /* dump report by using the first video and audio streams */
3217     print_report(1, timer_start, av_gettime());
3218
3219     /* close each encoder */
3220     for (i = 0; i < nb_output_streams; i++) {
3221         ost = output_streams[i];
3222         if (ost->encoding_needed) {
3223             av_freep(&ost->st->codec->stats_in);
3224             avcodec_close(ost->st->codec);
3225         }
3226     }
3227
3228     /* close each decoder */
3229     for (i = 0; i < nb_input_streams; i++) {
3230         ist = input_streams[i];
3231         if (ist->decoding_needed) {
3232             avcodec_close(ist->st->codec);
3233         }
3234     }
3235
3236     /* finished ! */
3237     ret = 0;
3238
3239  fail:
3240 #if HAVE_PTHREADS
3241     free_input_threads();
3242 #endif
3243
3244     if (output_streams) {
3245         for (i = 0; i < nb_output_streams; i++) {
3246             ost = output_streams[i];
3247             if (ost) {
3248                 if (ost->stream_copy)
3249                     av_freep(&ost->st->codec->extradata);
3250                 if (ost->logfile) {
3251                     fclose(ost->logfile);
3252                     ost->logfile = NULL;
3253                 }
3254                 av_freep(&ost->st->codec->subtitle_header);
3255                 av_free(ost->forced_kf_pts);
3256                 av_dict_free(&ost->opts);
3257                 av_dict_free(&ost->swr_opts);
3258                 av_dict_free(&ost->resample_opts);
3259             }
3260         }
3261     }
3262     return ret;
3263 }
3264
3265
3266 static int64_t getutime(void)
3267 {
3268 #if HAVE_GETRUSAGE
3269     struct rusage rusage;
3270
3271     getrusage(RUSAGE_SELF, &rusage);
3272     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
3273 #elif HAVE_GETPROCESSTIMES
3274     HANDLE proc;
3275     FILETIME c, e, k, u;
3276     proc = GetCurrentProcess();
3277     GetProcessTimes(proc, &c, &e, &k, &u);
3278     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
3279 #else
3280     return av_gettime();
3281 #endif
3282 }
3283
3284 static int64_t getmaxrss(void)
3285 {
3286 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
3287     struct rusage rusage;
3288     getrusage(RUSAGE_SELF, &rusage);
3289     return (int64_t)rusage.ru_maxrss * 1024;
3290 #elif HAVE_GETPROCESSMEMORYINFO
3291     HANDLE proc;
3292     PROCESS_MEMORY_COUNTERS memcounters;
3293     proc = GetCurrentProcess();
3294     memcounters.cb = sizeof(memcounters);
3295     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
3296     return memcounters.PeakPagefileUsage;
3297 #else
3298     return 0;
3299 #endif
3300 }
3301
3302 static void log_callback_null(void *ptr, int level, const char *fmt, va_list vl)
3303 {
3304 }
3305
3306 int main(int argc, char **argv)
3307 {
3308     int ret;
3309     int64_t ti;
3310
3311     atexit(exit_program);
3312
3313     setvbuf(stderr,NULL,_IONBF,0); /* win32 runtime needs this */
3314
3315     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3316     parse_loglevel(argc, argv, options);
3317
3318     if(argc>1 && !strcmp(argv[1], "-d")){
3319         run_as_daemon=1;
3320         av_log_set_callback(log_callback_null);
3321         argc--;
3322         argv++;
3323     }
3324
3325     avcodec_register_all();
3326 #if CONFIG_AVDEVICE
3327     avdevice_register_all();
3328 #endif
3329     avfilter_register_all();
3330     av_register_all();
3331     avformat_network_init();
3332
3333     show_banner(argc, argv, options);
3334
3335     term_init();
3336
3337     /* parse options and open all input/output files */
3338     ret = ffmpeg_parse_options(argc, argv);
3339     if (ret < 0)
3340         exit(1);
3341
3342     if (nb_output_files <= 0 && nb_input_files == 0) {
3343         show_usage();
3344         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3345         exit(1);
3346     }
3347
3348     /* file converter / grab */
3349     if (nb_output_files <= 0) {
3350         av_log(NULL, AV_LOG_FATAL, "At least one output file must be specified\n");
3351         exit(1);
3352     }
3353
3354 //     if (nb_input_files == 0) {
3355 //         av_log(NULL, AV_LOG_FATAL, "At least one input file must be specified\n");
3356 //         exit(1);
3357 //     }
3358
3359     current_time = ti = getutime();
3360     if (transcode() < 0)
3361         exit(1);
3362     ti = getutime() - ti;
3363     if (do_benchmark) {
3364         printf("bench: utime=%0.3fs\n", ti / 1000000.0);
3365     }
3366     av_log(NULL, AV_LOG_DEBUG, "%"PRIu64" frames successfully decoded, %"PRIu64" decoding errors\n",
3367            decode_error_stat[0], decode_error_stat[1]);
3368     if (2*decode_error_stat[0] < decode_error_stat[1])
3369         exit(254);
3370
3371     exit(received_nb_signals ? 255 : 0);
3372     return 0;
3373 }