9f9170e3276373a1381300057498da762cf9de23
[ffmpeg.git] / ffmpeg.c
1 /*
2  * Copyright (c) 2000-2003 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 /**
22  * @file
23  * multimedia converter based on the FFmpeg libraries
24  */
25
26 #include "config.h"
27 #include <ctype.h>
28 #include <string.h>
29 #include <math.h>
30 #include <stdlib.h>
31 #include <errno.h>
32 #include <limits.h>
33 #include <stdint.h>
34
35 #if HAVE_ISATTY
36 #if HAVE_IO_H
37 #include <io.h>
38 #endif
39 #if HAVE_UNISTD_H
40 #include <unistd.h>
41 #endif
42 #endif
43
44 #include "libavformat/avformat.h"
45 #include "libavdevice/avdevice.h"
46 #include "libswresample/swresample.h"
47 #include "libavutil/opt.h"
48 #include "libavutil/channel_layout.h"
49 #include "libavutil/parseutils.h"
50 #include "libavutil/samplefmt.h"
51 #include "libavutil/fifo.h"
52 #include "libavutil/internal.h"
53 #include "libavutil/intreadwrite.h"
54 #include "libavutil/dict.h"
55 #include "libavutil/mathematics.h"
56 #include "libavutil/pixdesc.h"
57 #include "libavutil/avstring.h"
58 #include "libavutil/libm.h"
59 #include "libavutil/imgutils.h"
60 #include "libavutil/timestamp.h"
61 #include "libavutil/bprint.h"
62 #include "libavutil/time.h"
63 #include "libavutil/threadmessage.h"
64 #include "libavcodec/mathops.h"
65 #include "libavformat/os_support.h"
66
67 # include "libavfilter/avcodec.h"
68 # include "libavfilter/avfilter.h"
69 # include "libavfilter/buffersrc.h"
70 # include "libavfilter/buffersink.h"
71
72 #if HAVE_SYS_RESOURCE_H
73 #include <sys/time.h>
74 #include <sys/types.h>
75 #include <sys/resource.h>
76 #elif HAVE_GETPROCESSTIMES
77 #include <windows.h>
78 #endif
79 #if HAVE_GETPROCESSMEMORYINFO
80 #include <windows.h>
81 #include <psapi.h>
82 #endif
83 #if HAVE_SETCONSOLECTRLHANDLER
84 #include <windows.h>
85 #endif
86
87
88 #if HAVE_SYS_SELECT_H
89 #include <sys/select.h>
90 #endif
91
92 #if HAVE_TERMIOS_H
93 #include <fcntl.h>
94 #include <sys/ioctl.h>
95 #include <sys/time.h>
96 #include <termios.h>
97 #elif HAVE_KBHIT
98 #include <conio.h>
99 #endif
100
101 #if HAVE_PTHREADS
102 #include <pthread.h>
103 #endif
104
105 #include <time.h>
106
107 #include "ffmpeg.h"
108 #include "cmdutils.h"
109
110 #include "libavutil/avassert.h"
111
112 const char program_name[] = "ffmpeg";
113 const int program_birth_year = 2000;
114
115 static FILE *vstats_file;
116
117 const char *const forced_keyframes_const_names[] = {
118     "n",
119     "n_forced",
120     "prev_forced_n",
121     "prev_forced_t",
122     "t",
123     NULL
124 };
125
126 static void do_video_stats(OutputStream *ost, int frame_size);
127 static int64_t getutime(void);
128 static int64_t getmaxrss(void);
129
130 static int run_as_daemon  = 0;
131 static int nb_frames_dup = 0;
132 static int nb_frames_drop = 0;
133 static int64_t decode_error_stat[2];
134
135 static int current_time;
136 AVIOContext *progress_avio = NULL;
137
138 static uint8_t *subtitle_out;
139
140 InputStream **input_streams = NULL;
141 int        nb_input_streams = 0;
142 InputFile   **input_files   = NULL;
143 int        nb_input_files   = 0;
144
145 OutputStream **output_streams = NULL;
146 int         nb_output_streams = 0;
147 OutputFile   **output_files   = NULL;
148 int         nb_output_files   = 0;
149
150 FilterGraph **filtergraphs;
151 int        nb_filtergraphs;
152
153 #if HAVE_TERMIOS_H
154
155 /* init terminal so that we can grab keys */
156 static struct termios oldtty;
157 static int restore_tty;
158 #endif
159
160 #if HAVE_PTHREADS
161 static void free_input_threads(void);
162 #endif
163
164 /* sub2video hack:
165    Convert subtitles to video with alpha to insert them in filter graphs.
166    This is a temporary solution until libavfilter gets real subtitles support.
167  */
168
169 static int sub2video_get_blank_frame(InputStream *ist)
170 {
171     int ret;
172     AVFrame *frame = ist->sub2video.frame;
173
174     av_frame_unref(frame);
175     ist->sub2video.frame->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
176     ist->sub2video.frame->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
177     ist->sub2video.frame->format = AV_PIX_FMT_RGB32;
178     if ((ret = av_frame_get_buffer(frame, 32)) < 0)
179         return ret;
180     memset(frame->data[0], 0, frame->height * frame->linesize[0]);
181     return 0;
182 }
183
184 static void sub2video_copy_rect(uint8_t *dst, int dst_linesize, int w, int h,
185                                 AVSubtitleRect *r)
186 {
187     uint32_t *pal, *dst2;
188     uint8_t *src, *src2;
189     int x, y;
190
191     if (r->type != SUBTITLE_BITMAP) {
192         av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n");
193         return;
194     }
195     if (r->x < 0 || r->x + r->w > w || r->y < 0 || r->y + r->h > h) {
196         av_log(NULL, AV_LOG_WARNING, "sub2video: rectangle (%d %d %d %d) overflowing %d %d\n",
197             r->x, r->y, r->w, r->h, w, h
198         );
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     AVFrame *frame = ist->sub2video.frame;
231     int8_t *dst;
232     int     dst_linesize;
233     int num_rects, i;
234     int64_t pts, end_pts;
235
236     if (!frame)
237         return;
238     if (sub) {
239         pts       = av_rescale_q(sub->pts + sub->start_display_time * 1000LL,
240                                  AV_TIME_BASE_Q, ist->st->time_base);
241         end_pts   = av_rescale_q(sub->pts + sub->end_display_time   * 1000LL,
242                                  AV_TIME_BASE_Q, ist->st->time_base);
243         num_rects = sub->num_rects;
244     } else {
245         pts       = ist->sub2video.end_pts;
246         end_pts   = INT64_MAX;
247         num_rects = 0;
248     }
249     if (sub2video_get_blank_frame(ist) < 0) {
250         av_log(ist->dec_ctx, AV_LOG_ERROR,
251                "Impossible to get a blank canvas.\n");
252         return;
253     }
254     dst          = frame->data    [0];
255     dst_linesize = frame->linesize[0];
256     for (i = 0; i < num_rects; i++)
257         sub2video_copy_rect(dst, dst_linesize, frame->width, frame->height, sub->rects[i]);
258     sub2video_push_ref(ist, pts);
259     ist->sub2video.end_pts = end_pts;
260 }
261
262 static void sub2video_heartbeat(InputStream *ist, int64_t pts)
263 {
264     InputFile *infile = input_files[ist->file_index];
265     int i, j, nb_reqs;
266     int64_t pts2;
267
268     /* When a frame is read from a file, examine all sub2video streams in
269        the same file and send the sub2video frame again. Otherwise, decoded
270        video frames could be accumulating in the filter graph while a filter
271        (possibly overlay) is desperately waiting for a subtitle frame. */
272     for (i = 0; i < infile->nb_streams; i++) {
273         InputStream *ist2 = input_streams[infile->ist_index + i];
274         if (!ist2->sub2video.frame)
275             continue;
276         /* subtitles seem to be usually muxed ahead of other streams;
277            if not, subtracting a larger time here is necessary */
278         pts2 = av_rescale_q(pts, ist->st->time_base, ist2->st->time_base) - 1;
279         /* do not send the heartbeat frame if the subtitle is already ahead */
280         if (pts2 <= ist2->sub2video.last_pts)
281             continue;
282         if (pts2 >= ist2->sub2video.end_pts || !ist2->sub2video.frame->data[0])
283             sub2video_update(ist2, NULL);
284         for (j = 0, nb_reqs = 0; j < ist2->nb_filters; j++)
285             nb_reqs += av_buffersrc_get_nb_failed_requests(ist2->filters[j]->filter);
286         if (nb_reqs)
287             sub2video_push_ref(ist2, pts2);
288     }
289 }
290
291 static void sub2video_flush(InputStream *ist)
292 {
293     int i;
294
295     if (ist->sub2video.end_pts < INT64_MAX)
296         sub2video_update(ist, NULL);
297     for (i = 0; i < ist->nb_filters; i++)
298         av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
299 }
300
301 /* end of sub2video hack */
302
303 static void term_exit_sigsafe(void)
304 {
305 #if HAVE_TERMIOS_H
306     if(restore_tty)
307         tcsetattr (0, TCSANOW, &oldtty);
308 #endif
309 }
310
311 void term_exit(void)
312 {
313     av_log(NULL, AV_LOG_QUIET, "%s", "");
314     term_exit_sigsafe();
315 }
316
317 static volatile int received_sigterm = 0;
318 static volatile int received_nb_signals = 0;
319 static volatile int transcode_init_done = 0;
320 static volatile int ffmpeg_exited = 0;
321 static int main_return_code = 0;
322
323 static void
324 sigterm_handler(int sig)
325 {
326     received_sigterm = sig;
327     received_nb_signals++;
328     term_exit_sigsafe();
329     if(received_nb_signals > 3) {
330         write(2/*STDERR_FILENO*/, "Received > 3 system signals, hard exiting\n",
331                            strlen("Received > 3 system signals, hard exiting\n"));
332
333         exit(123);
334     }
335 }
336
337 #if HAVE_SETCONSOLECTRLHANDLER
338 static BOOL WINAPI CtrlHandler(DWORD fdwCtrlType)
339 {
340     av_log(NULL, AV_LOG_DEBUG, "\nReceived windows signal %ld\n", fdwCtrlType);
341
342     switch (fdwCtrlType)
343     {
344     case CTRL_C_EVENT:
345     case CTRL_BREAK_EVENT:
346         sigterm_handler(SIGINT);
347         return TRUE;
348
349     case CTRL_CLOSE_EVENT:
350     case CTRL_LOGOFF_EVENT:
351     case CTRL_SHUTDOWN_EVENT:
352         sigterm_handler(SIGTERM);
353         /* Basically, with these 3 events, when we return from this method the
354            process is hard terminated, so stall as long as we need to
355            to try and let the main thread(s) clean up and gracefully terminate
356            (we have at most 5 seconds, but should be done far before that). */
357         while (!ffmpeg_exited) {
358             Sleep(0);
359         }
360         return TRUE;
361
362     default:
363         av_log(NULL, AV_LOG_ERROR, "Received unknown windows signal %ld\n", fdwCtrlType);
364         return FALSE;
365     }
366 }
367 #endif
368
369 void term_init(void)
370 {
371 #if HAVE_TERMIOS_H
372     if(!run_as_daemon){
373         struct termios tty;
374         int istty = 1;
375 #if HAVE_ISATTY
376         istty = isatty(0) && isatty(2);
377 #endif
378         if (istty && tcgetattr (0, &tty) == 0) {
379             oldtty = tty;
380             restore_tty = 1;
381
382             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
383                              |INLCR|IGNCR|ICRNL|IXON);
384             tty.c_oflag |= OPOST;
385             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
386             tty.c_cflag &= ~(CSIZE|PARENB);
387             tty.c_cflag |= CS8;
388             tty.c_cc[VMIN] = 1;
389             tty.c_cc[VTIME] = 0;
390
391             tcsetattr (0, TCSANOW, &tty);
392         }
393         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
394     }
395 #endif
396
397     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
398     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
399 #ifdef SIGXCPU
400     signal(SIGXCPU, sigterm_handler);
401 #endif
402 #if HAVE_SETCONSOLECTRLHANDLER
403     SetConsoleCtrlHandler((PHANDLER_ROUTINE) CtrlHandler, TRUE);
404 #endif
405 }
406
407 /* read a key without blocking */
408 static int read_key(void)
409 {
410     unsigned char ch;
411 #if HAVE_TERMIOS_H
412     int n = 1;
413     struct timeval tv;
414     fd_set rfds;
415
416     FD_ZERO(&rfds);
417     FD_SET(0, &rfds);
418     tv.tv_sec = 0;
419     tv.tv_usec = 0;
420     n = select(1, &rfds, NULL, NULL, &tv);
421     if (n > 0) {
422         n = read(0, &ch, 1);
423         if (n == 1)
424             return ch;
425
426         return n;
427     }
428 #elif HAVE_KBHIT
429 #    if HAVE_PEEKNAMEDPIPE
430     static int is_pipe;
431     static HANDLE input_handle;
432     DWORD dw, nchars;
433     if(!input_handle){
434         input_handle = GetStdHandle(STD_INPUT_HANDLE);
435         is_pipe = !GetConsoleMode(input_handle, &dw);
436     }
437
438     if (is_pipe) {
439         /* When running under a GUI, you will end here. */
440         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL)) {
441             // input pipe may have been closed by the program that ran ffmpeg
442             return -1;
443         }
444         //Read it
445         if(nchars != 0) {
446             read(0, &ch, 1);
447             return ch;
448         }else{
449             return -1;
450         }
451     }
452 #    endif
453     if(kbhit())
454         return(getch());
455 #endif
456     return -1;
457 }
458
459 static int decode_interrupt_cb(void *ctx)
460 {
461     return received_nb_signals > transcode_init_done;
462 }
463
464 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
465
466 static void ffmpeg_cleanup(int ret)
467 {
468     int i, j;
469
470     if (do_benchmark) {
471         int maxrss = getmaxrss() / 1024;
472         av_log(NULL, AV_LOG_INFO, "bench: maxrss=%ikB\n", maxrss);
473     }
474
475     for (i = 0; i < nb_filtergraphs; i++) {
476         FilterGraph *fg = filtergraphs[i];
477         avfilter_graph_free(&fg->graph);
478         for (j = 0; j < fg->nb_inputs; j++) {
479             av_freep(&fg->inputs[j]->name);
480             av_freep(&fg->inputs[j]);
481         }
482         av_freep(&fg->inputs);
483         for (j = 0; j < fg->nb_outputs; j++) {
484             av_freep(&fg->outputs[j]->name);
485             av_freep(&fg->outputs[j]);
486         }
487         av_freep(&fg->outputs);
488         av_freep(&fg->graph_desc);
489
490         av_freep(&filtergraphs[i]);
491     }
492     av_freep(&filtergraphs);
493
494     av_freep(&subtitle_out);
495
496     /* close files */
497     for (i = 0; i < nb_output_files; i++) {
498         OutputFile *of = output_files[i];
499         AVFormatContext *s;
500         if (!of)
501             continue;
502         s = of->ctx;
503         if (s && s->oformat && !(s->oformat->flags & AVFMT_NOFILE))
504             avio_closep(&s->pb);
505         avformat_free_context(s);
506         av_dict_free(&of->opts);
507
508         av_freep(&output_files[i]);
509     }
510     for (i = 0; i < nb_output_streams; i++) {
511         OutputStream *ost = output_streams[i];
512         AVBitStreamFilterContext *bsfc;
513
514         if (!ost)
515             continue;
516
517         bsfc = ost->bitstream_filters;
518         while (bsfc) {
519             AVBitStreamFilterContext *next = bsfc->next;
520             av_bitstream_filter_close(bsfc);
521             bsfc = next;
522         }
523         ost->bitstream_filters = NULL;
524         av_frame_free(&ost->filtered_frame);
525         av_frame_free(&ost->last_frame);
526
527         av_parser_close(ost->parser);
528
529         av_freep(&ost->forced_keyframes);
530         av_expr_free(ost->forced_keyframes_pexpr);
531         av_freep(&ost->avfilter);
532         av_freep(&ost->logfile_prefix);
533
534         av_freep(&ost->audio_channels_map);
535         ost->audio_channels_mapped = 0;
536
537         avcodec_free_context(&ost->enc_ctx);
538
539         av_freep(&output_streams[i]);
540     }
541 #if HAVE_PTHREADS
542     free_input_threads();
543 #endif
544     for (i = 0; i < nb_input_files; i++) {
545         avformat_close_input(&input_files[i]->ctx);
546         av_freep(&input_files[i]);
547     }
548     for (i = 0; i < nb_input_streams; i++) {
549         InputStream *ist = input_streams[i];
550
551         av_frame_free(&ist->decoded_frame);
552         av_frame_free(&ist->filter_frame);
553         av_dict_free(&ist->decoder_opts);
554         avsubtitle_free(&ist->prev_sub.subtitle);
555         av_frame_free(&ist->sub2video.frame);
556         av_freep(&ist->filters);
557         av_freep(&ist->hwaccel_device);
558
559         avcodec_free_context(&ist->dec_ctx);
560
561         av_freep(&input_streams[i]);
562     }
563
564     if (vstats_file)
565         fclose(vstats_file);
566     av_freep(&vstats_filename);
567
568     av_freep(&input_streams);
569     av_freep(&input_files);
570     av_freep(&output_streams);
571     av_freep(&output_files);
572
573     uninit_opts();
574
575     avformat_network_deinit();
576
577     if (received_sigterm) {
578         av_log(NULL, AV_LOG_INFO, "Exiting normally, received signal %d.\n",
579                (int) received_sigterm);
580     } else if (ret && transcode_init_done) {
581         av_log(NULL, AV_LOG_INFO, "Conversion failed!\n");
582     }
583     term_exit();
584     ffmpeg_exited = 1;
585 }
586
587 void remove_avoptions(AVDictionary **a, AVDictionary *b)
588 {
589     AVDictionaryEntry *t = NULL;
590
591     while ((t = av_dict_get(b, "", t, AV_DICT_IGNORE_SUFFIX))) {
592         av_dict_set(a, t->key, NULL, AV_DICT_MATCH_CASE);
593     }
594 }
595
596 void assert_avoptions(AVDictionary *m)
597 {
598     AVDictionaryEntry *t;
599     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
600         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
601         exit_program(1);
602     }
603 }
604
605 static void abort_codec_experimental(AVCodec *c, int encoder)
606 {
607     exit_program(1);
608 }
609
610 static void update_benchmark(const char *fmt, ...)
611 {
612     if (do_benchmark_all) {
613         int64_t t = getutime();
614         va_list va;
615         char buf[1024];
616
617         if (fmt) {
618             va_start(va, fmt);
619             vsnprintf(buf, sizeof(buf), fmt, va);
620             va_end(va);
621             av_log(NULL, AV_LOG_INFO, "bench: %8"PRIu64" %s \n", t - current_time, buf);
622         }
623         current_time = t;
624     }
625 }
626
627 static void close_all_output_streams(OutputStream *ost, OSTFinished this_stream, OSTFinished others)
628 {
629     int i;
630     for (i = 0; i < nb_output_streams; i++) {
631         OutputStream *ost2 = output_streams[i];
632         ost2->finished |= ost == ost2 ? this_stream : others;
633     }
634 }
635
636 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
637 {
638     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
639     AVCodecContext          *avctx = ost->encoding_needed ? ost->enc_ctx : ost->st->codec;
640     int ret;
641
642     if (!ost->st->codec->extradata_size && ost->enc_ctx->extradata_size) {
643         ost->st->codec->extradata = av_mallocz(ost->enc_ctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
644         if (ost->st->codec->extradata) {
645             memcpy(ost->st->codec->extradata, ost->enc_ctx->extradata, ost->enc_ctx->extradata_size);
646             ost->st->codec->extradata_size = ost->enc_ctx->extradata_size;
647         }
648     }
649
650     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
651         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
652         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
653
654     /*
655      * Audio encoders may split the packets --  #frames in != #packets out.
656      * But there is no reordering, so we can limit the number of output packets
657      * by simply dropping them here.
658      * Counting encoded video frames needs to be done separately because of
659      * reordering, see do_video_out()
660      */
661     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
662         if (ost->frame_number >= ost->max_frames) {
663             av_free_packet(pkt);
664             return;
665         }
666         ost->frame_number++;
667     }
668     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
669         int i;
670         uint8_t *sd = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS,
671                                               NULL);
672         ost->quality = sd ? AV_RL32(sd) : -1;
673         ost->pict_type = sd ? sd[4] : AV_PICTURE_TYPE_NONE;
674
675         for (i = 0; i<FF_ARRAY_ELEMS(ost->error); i++) {
676             if (sd && i < sd[5])
677                 ost->error[i] = AV_RL64(sd + 8 + 8*i);
678             else
679                 ost->error[i] = -1;
680         }
681     }
682
683     if (bsfc)
684         av_packet_split_side_data(pkt);
685
686     while (bsfc) {
687         AVPacket new_pkt = *pkt;
688         AVDictionaryEntry *bsf_arg = av_dict_get(ost->bsf_args,
689                                                  bsfc->filter->name,
690                                                  NULL, 0);
691         int a = av_bitstream_filter_filter(bsfc, avctx,
692                                            bsf_arg ? bsf_arg->value : NULL,
693                                            &new_pkt.data, &new_pkt.size,
694                                            pkt->data, pkt->size,
695                                            pkt->flags & AV_PKT_FLAG_KEY);
696 FF_DISABLE_DEPRECATION_WARNINGS
697         if(a == 0 && new_pkt.data != pkt->data
698 #if FF_API_DESTRUCT_PACKET
699            && new_pkt.destruct
700 #endif
701            ) {
702 FF_ENABLE_DEPRECATION_WARNINGS
703             uint8_t *t = av_malloc(new_pkt.size + AV_INPUT_BUFFER_PADDING_SIZE); //the new should be a subset of the old so cannot overflow
704             if(t) {
705                 memcpy(t, new_pkt.data, new_pkt.size);
706                 memset(t + new_pkt.size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
707                 new_pkt.data = t;
708                 new_pkt.buf = NULL;
709                 a = 1;
710             } else
711                 a = AVERROR(ENOMEM);
712         }
713         if (a > 0) {
714             pkt->side_data = NULL;
715             pkt->side_data_elems = 0;
716             av_free_packet(pkt);
717             new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
718                                            av_buffer_default_free, NULL, 0);
719             if (!new_pkt.buf)
720                 exit_program(1);
721         } else if (a < 0) {
722             new_pkt = *pkt;
723             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
724                    bsfc->filter->name, pkt->stream_index,
725                    avctx->codec ? avctx->codec->name : "copy");
726             print_error("", a);
727             if (exit_on_error)
728                 exit_program(1);
729         }
730         *pkt = new_pkt;
731
732         bsfc = bsfc->next;
733     }
734
735     if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
736         if (pkt->dts != AV_NOPTS_VALUE &&
737             pkt->pts != AV_NOPTS_VALUE &&
738             pkt->dts > pkt->pts) {
739             av_log(s, AV_LOG_WARNING, "Invalid DTS: %"PRId64" PTS: %"PRId64" in output stream %d:%d, replacing by guess\n",
740                    pkt->dts, pkt->pts,
741                    ost->file_index, ost->st->index);
742             pkt->pts =
743             pkt->dts = pkt->pts + pkt->dts + ost->last_mux_dts + 1
744                      - FFMIN3(pkt->pts, pkt->dts, ost->last_mux_dts + 1)
745                      - FFMAX3(pkt->pts, pkt->dts, ost->last_mux_dts + 1);
746         }
747      if(
748         (avctx->codec_type == AVMEDIA_TYPE_AUDIO || avctx->codec_type == AVMEDIA_TYPE_VIDEO) &&
749         pkt->dts != AV_NOPTS_VALUE &&
750         ost->last_mux_dts != AV_NOPTS_VALUE) {
751       int64_t max = ost->last_mux_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
752       if (pkt->dts < max) {
753         int loglevel = max - pkt->dts > 2 || avctx->codec_type == AVMEDIA_TYPE_VIDEO ? AV_LOG_WARNING : AV_LOG_DEBUG;
754         av_log(s, loglevel, "Non-monotonous DTS in output stream "
755                "%d:%d; previous: %"PRId64", current: %"PRId64"; ",
756                ost->file_index, ost->st->index, ost->last_mux_dts, pkt->dts);
757         if (exit_on_error) {
758             av_log(NULL, AV_LOG_FATAL, "aborting.\n");
759             exit_program(1);
760         }
761         av_log(s, loglevel, "changing to %"PRId64". This may result "
762                "in incorrect timestamps in the output file.\n",
763                max);
764         if(pkt->pts >= pkt->dts)
765             pkt->pts = FFMAX(pkt->pts, max);
766         pkt->dts = max;
767       }
768      }
769     }
770     ost->last_mux_dts = pkt->dts;
771
772     ost->data_size += pkt->size;
773     ost->packets_written++;
774
775     pkt->stream_index = ost->index;
776
777     if (debug_ts) {
778         av_log(NULL, AV_LOG_INFO, "muxer <- type:%s "
779                 "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s size:%d\n",
780                 av_get_media_type_string(ost->enc_ctx->codec_type),
781                 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ost->st->time_base),
782                 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->st->time_base),
783                 pkt->size
784               );
785     }
786
787     ret = av_interleaved_write_frame(s, pkt);
788     if (ret < 0) {
789         print_error("av_interleaved_write_frame()", ret);
790         main_return_code = 1;
791         close_all_output_streams(ost, MUXER_FINISHED | ENCODER_FINISHED, ENCODER_FINISHED);
792     }
793     av_free_packet(pkt);
794 }
795
796 static void close_output_stream(OutputStream *ost)
797 {
798     OutputFile *of = output_files[ost->file_index];
799
800     ost->finished |= ENCODER_FINISHED;
801     if (of->shortest) {
802         int64_t end = av_rescale_q(ost->sync_opts - ost->first_pts, ost->enc_ctx->time_base, AV_TIME_BASE_Q);
803         of->recording_time = FFMIN(of->recording_time, end);
804     }
805 }
806
807 static int check_recording_time(OutputStream *ost)
808 {
809     OutputFile *of = output_files[ost->file_index];
810
811     if (of->recording_time != INT64_MAX &&
812         av_compare_ts(ost->sync_opts - ost->first_pts, ost->enc_ctx->time_base, of->recording_time,
813                       AV_TIME_BASE_Q) >= 0) {
814         close_output_stream(ost);
815         return 0;
816     }
817     return 1;
818 }
819
820 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
821                          AVFrame *frame)
822 {
823     AVCodecContext *enc = ost->enc_ctx;
824     AVPacket pkt;
825     int got_packet = 0;
826
827     av_init_packet(&pkt);
828     pkt.data = NULL;
829     pkt.size = 0;
830
831     if (!check_recording_time(ost))
832         return;
833
834     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
835         frame->pts = ost->sync_opts;
836     ost->sync_opts = frame->pts + frame->nb_samples;
837     ost->samples_encoded += frame->nb_samples;
838     ost->frames_encoded++;
839
840     av_assert0(pkt.size || !pkt.data);
841     update_benchmark(NULL);
842     if (debug_ts) {
843         av_log(NULL, AV_LOG_INFO, "encoder <- type:audio "
844                "frame_pts:%s frame_pts_time:%s time_base:%d/%d\n",
845                av_ts2str(frame->pts), av_ts2timestr(frame->pts, &enc->time_base),
846                enc->time_base.num, enc->time_base.den);
847     }
848
849     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
850         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
851         exit_program(1);
852     }
853     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
854
855     if (got_packet) {
856         av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
857
858         if (debug_ts) {
859             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
860                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
861                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
862                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
863         }
864
865         write_frame(s, &pkt, ost);
866     }
867 }
868
869 static void do_subtitle_out(AVFormatContext *s,
870                             OutputStream *ost,
871                             InputStream *ist,
872                             AVSubtitle *sub)
873 {
874     int subtitle_out_max_size = 1024 * 1024;
875     int subtitle_out_size, nb, i;
876     AVCodecContext *enc;
877     AVPacket pkt;
878     int64_t pts;
879
880     if (sub->pts == AV_NOPTS_VALUE) {
881         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
882         if (exit_on_error)
883             exit_program(1);
884         return;
885     }
886
887     enc = ost->enc_ctx;
888
889     if (!subtitle_out) {
890         subtitle_out = av_malloc(subtitle_out_max_size);
891         if (!subtitle_out) {
892             av_log(NULL, AV_LOG_FATAL, "Failed to allocate subtitle_out\n");
893             exit_program(1);
894         }
895     }
896
897     /* Note: DVB subtitle need one packet to draw them and one other
898        packet to clear them */
899     /* XXX: signal it in the codec context ? */
900     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
901         nb = 2;
902     else
903         nb = 1;
904
905     /* shift timestamp to honor -ss and make check_recording_time() work with -t */
906     pts = sub->pts;
907     if (output_files[ost->file_index]->start_time != AV_NOPTS_VALUE)
908         pts -= output_files[ost->file_index]->start_time;
909     for (i = 0; i < nb; i++) {
910         unsigned save_num_rects = sub->num_rects;
911
912         ost->sync_opts = av_rescale_q(pts, AV_TIME_BASE_Q, enc->time_base);
913         if (!check_recording_time(ost))
914             return;
915
916         sub->pts = pts;
917         // start_display_time is required to be 0
918         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
919         sub->end_display_time  -= sub->start_display_time;
920         sub->start_display_time = 0;
921         if (i == 1)
922             sub->num_rects = 0;
923
924         ost->frames_encoded++;
925
926         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
927                                                     subtitle_out_max_size, sub);
928         if (i == 1)
929             sub->num_rects = save_num_rects;
930         if (subtitle_out_size < 0) {
931             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
932             exit_program(1);
933         }
934
935         av_init_packet(&pkt);
936         pkt.data = subtitle_out;
937         pkt.size = subtitle_out_size;
938         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
939         pkt.duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->st->time_base);
940         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
941             /* XXX: the pts correction is handled here. Maybe handling
942                it in the codec would be better */
943             if (i == 0)
944                 pkt.pts += 90 * sub->start_display_time;
945             else
946                 pkt.pts += 90 * sub->end_display_time;
947         }
948         pkt.dts = pkt.pts;
949         write_frame(s, &pkt, ost);
950     }
951 }
952
953 static void do_video_out(AVFormatContext *s,
954                          OutputStream *ost,
955                          AVFrame *next_picture,
956                          double sync_ipts)
957 {
958     int ret, format_video_sync;
959     AVPacket pkt;
960     AVCodecContext *enc = ost->enc_ctx;
961     AVCodecContext *mux_enc = ost->st->codec;
962     int nb_frames, nb0_frames, i;
963     double delta, delta0;
964     double duration = 0;
965     int frame_size = 0;
966     InputStream *ist = NULL;
967     AVFilterContext *filter = ost->filter->filter;
968
969     if (ost->source_index >= 0)
970         ist = input_streams[ost->source_index];
971
972     if (filter->inputs[0]->frame_rate.num > 0 &&
973         filter->inputs[0]->frame_rate.den > 0)
974         duration = 1/(av_q2d(filter->inputs[0]->frame_rate) * av_q2d(enc->time_base));
975
976     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
977         duration = FFMIN(duration, 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base)));
978
979     if (!ost->filters_script &&
980         !ost->filters &&
981         next_picture &&
982         ist &&
983         lrintf(av_frame_get_pkt_duration(next_picture) * av_q2d(ist->st->time_base) / av_q2d(enc->time_base)) > 0) {
984         duration = lrintf(av_frame_get_pkt_duration(next_picture) * av_q2d(ist->st->time_base) / av_q2d(enc->time_base));
985     }
986
987     if (!next_picture) {
988         //end, flushing
989         nb0_frames = nb_frames = mid_pred(ost->last_nb0_frames[0],
990                                           ost->last_nb0_frames[1],
991                                           ost->last_nb0_frames[2]);
992     } else {
993         delta0 = sync_ipts - ost->sync_opts;
994         delta  = delta0 + duration;
995
996         /* by default, we output a single frame */
997         nb0_frames = 0;
998         nb_frames = 1;
999
1000         format_video_sync = video_sync_method;
1001         if (format_video_sync == VSYNC_AUTO) {
1002             if(!strcmp(s->oformat->name, "avi")) {
1003                 format_video_sync = VSYNC_VFR;
1004             } else
1005                 format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : VSYNC_CFR;
1006             if (   ist
1007                 && format_video_sync == VSYNC_CFR
1008                 && input_files[ist->file_index]->ctx->nb_streams == 1
1009                 && input_files[ist->file_index]->input_ts_offset == 0) {
1010                 format_video_sync = VSYNC_VSCFR;
1011             }
1012             if (format_video_sync == VSYNC_CFR && copy_ts) {
1013                 format_video_sync = VSYNC_VSCFR;
1014             }
1015         }
1016
1017         if (delta0 < 0 &&
1018             delta > 0 &&
1019             format_video_sync != VSYNC_PASSTHROUGH &&
1020             format_video_sync != VSYNC_DROP) {
1021             double cor = FFMIN(-delta0, duration);
1022             if (delta0 < -0.6) {
1023                 av_log(NULL, AV_LOG_WARNING, "Past duration %f too large\n", -delta0);
1024             } else
1025                 av_log(NULL, AV_LOG_DEBUG, "Cliping frame in rate conversion by %f\n", -delta0);
1026             sync_ipts += cor;
1027             duration -= cor;
1028             delta0 += cor;
1029         }
1030
1031         switch (format_video_sync) {
1032         case VSYNC_VSCFR:
1033             if (ost->frame_number == 0 && delta - duration >= 0.5) {
1034                 av_log(NULL, AV_LOG_DEBUG, "Not duplicating %d initial frames\n", (int)lrintf(delta - duration));
1035                 delta = duration;
1036                 delta0 = 0;
1037                 ost->sync_opts = lrint(sync_ipts);
1038             }
1039         case VSYNC_CFR:
1040             // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
1041             if (frame_drop_threshold && delta < frame_drop_threshold && ost->frame_number) {
1042                 nb_frames = 0;
1043             } else if (delta < -1.1)
1044                 nb_frames = 0;
1045             else if (delta > 1.1) {
1046                 nb_frames = lrintf(delta);
1047                 if (delta0 > 1.1)
1048                     nb0_frames = lrintf(delta0 - 0.6);
1049             }
1050             break;
1051         case VSYNC_VFR:
1052             if (delta <= -0.6)
1053                 nb_frames = 0;
1054             else if (delta > 0.6)
1055                 ost->sync_opts = lrint(sync_ipts);
1056             break;
1057         case VSYNC_DROP:
1058         case VSYNC_PASSTHROUGH:
1059             ost->sync_opts = lrint(sync_ipts);
1060             break;
1061         default:
1062             av_assert0(0);
1063         }
1064     }
1065
1066     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
1067     nb0_frames = FFMIN(nb0_frames, nb_frames);
1068
1069     memmove(ost->last_nb0_frames + 1,
1070             ost->last_nb0_frames,
1071             sizeof(ost->last_nb0_frames[0]) * (FF_ARRAY_ELEMS(ost->last_nb0_frames) - 1));
1072     ost->last_nb0_frames[0] = nb0_frames;
1073
1074     if (nb0_frames == 0 && ost->last_droped) {
1075         nb_frames_drop++;
1076         av_log(NULL, AV_LOG_VERBOSE,
1077                "*** dropping frame %d from stream %d at ts %"PRId64"\n",
1078                ost->frame_number, ost->st->index, ost->last_frame->pts);
1079     }
1080     if (nb_frames > (nb0_frames && ost->last_droped) + (nb_frames > nb0_frames)) {
1081         if (nb_frames > dts_error_threshold * 30) {
1082             av_log(NULL, AV_LOG_ERROR, "%d frame duplication too large, skipping\n", nb_frames - 1);
1083             nb_frames_drop++;
1084             return;
1085         }
1086         nb_frames_dup += nb_frames - (nb0_frames && ost->last_droped) - (nb_frames > nb0_frames);
1087         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
1088     }
1089     ost->last_droped = nb_frames == nb0_frames && next_picture;
1090
1091   /* duplicates frame if needed */
1092   for (i = 0; i < nb_frames; i++) {
1093     AVFrame *in_picture;
1094     av_init_packet(&pkt);
1095     pkt.data = NULL;
1096     pkt.size = 0;
1097
1098     if (i < nb0_frames && ost->last_frame) {
1099         in_picture = ost->last_frame;
1100     } else
1101         in_picture = next_picture;
1102
1103     if (!in_picture)
1104         return;
1105
1106     in_picture->pts = ost->sync_opts;
1107
1108 #if 1
1109     if (!check_recording_time(ost))
1110 #else
1111     if (ost->frame_number >= ost->max_frames)
1112 #endif
1113         return;
1114
1115     if (s->oformat->flags & AVFMT_RAWPICTURE &&
1116         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
1117         /* raw pictures are written as AVPicture structure to
1118            avoid any copies. We support temporarily the older
1119            method. */
1120         if (in_picture->interlaced_frame)
1121             mux_enc->field_order = in_picture->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
1122         else
1123             mux_enc->field_order = AV_FIELD_PROGRESSIVE;
1124         pkt.data   = (uint8_t *)in_picture;
1125         pkt.size   =  sizeof(AVPicture);
1126         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
1127         pkt.flags |= AV_PKT_FLAG_KEY;
1128
1129         write_frame(s, &pkt, ost);
1130     } else {
1131         int got_packet, forced_keyframe = 0;
1132         double pts_time;
1133
1134         if (enc->flags & (AV_CODEC_FLAG_INTERLACED_DCT | AV_CODEC_FLAG_INTERLACED_ME) &&
1135             ost->top_field_first >= 0)
1136             in_picture->top_field_first = !!ost->top_field_first;
1137
1138         if (in_picture->interlaced_frame) {
1139             if (enc->codec->id == AV_CODEC_ID_MJPEG)
1140                 mux_enc->field_order = in_picture->top_field_first ? AV_FIELD_TT:AV_FIELD_BB;
1141             else
1142                 mux_enc->field_order = in_picture->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
1143         } else
1144             mux_enc->field_order = AV_FIELD_PROGRESSIVE;
1145
1146         in_picture->quality = enc->global_quality;
1147         in_picture->pict_type = 0;
1148
1149         pts_time = in_picture->pts != AV_NOPTS_VALUE ?
1150             in_picture->pts * av_q2d(enc->time_base) : NAN;
1151         if (ost->forced_kf_index < ost->forced_kf_count &&
1152             in_picture->pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1153             ost->forced_kf_index++;
1154             forced_keyframe = 1;
1155         } else if (ost->forced_keyframes_pexpr) {
1156             double res;
1157             ost->forced_keyframes_expr_const_values[FKF_T] = pts_time;
1158             res = av_expr_eval(ost->forced_keyframes_pexpr,
1159                                ost->forced_keyframes_expr_const_values, NULL);
1160             ff_dlog(NULL, "force_key_frame: n:%f n_forced:%f prev_forced_n:%f t:%f prev_forced_t:%f -> res:%f\n",
1161                     ost->forced_keyframes_expr_const_values[FKF_N],
1162                     ost->forced_keyframes_expr_const_values[FKF_N_FORCED],
1163                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N],
1164                     ost->forced_keyframes_expr_const_values[FKF_T],
1165                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T],
1166                     res);
1167             if (res) {
1168                 forced_keyframe = 1;
1169                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] =
1170                     ost->forced_keyframes_expr_const_values[FKF_N];
1171                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] =
1172                     ost->forced_keyframes_expr_const_values[FKF_T];
1173                 ost->forced_keyframes_expr_const_values[FKF_N_FORCED] += 1;
1174             }
1175
1176             ost->forced_keyframes_expr_const_values[FKF_N] += 1;
1177         } else if (   ost->forced_keyframes
1178                    && !strncmp(ost->forced_keyframes, "source", 6)
1179                    && in_picture->key_frame==1) {
1180             forced_keyframe = 1;
1181         }
1182
1183         if (forced_keyframe) {
1184             in_picture->pict_type = AV_PICTURE_TYPE_I;
1185             av_log(NULL, AV_LOG_DEBUG, "Forced keyframe at time %f\n", pts_time);
1186         }
1187
1188         update_benchmark(NULL);
1189         if (debug_ts) {
1190             av_log(NULL, AV_LOG_INFO, "encoder <- type:video "
1191                    "frame_pts:%s frame_pts_time:%s time_base:%d/%d\n",
1192                    av_ts2str(in_picture->pts), av_ts2timestr(in_picture->pts, &enc->time_base),
1193                    enc->time_base.num, enc->time_base.den);
1194         }
1195
1196         ost->frames_encoded++;
1197
1198         ret = avcodec_encode_video2(enc, &pkt, in_picture, &got_packet);
1199         update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
1200         if (ret < 0) {
1201             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1202             exit_program(1);
1203         }
1204
1205         if (got_packet) {
1206             if (debug_ts) {
1207                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1208                        "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1209                        av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &enc->time_base),
1210                        av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &enc->time_base));
1211             }
1212
1213             if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & AV_CODEC_CAP_DELAY))
1214                 pkt.pts = ost->sync_opts;
1215
1216             av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
1217
1218             if (debug_ts) {
1219                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1220                     "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1221                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1222                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1223             }
1224
1225             frame_size = pkt.size;
1226             write_frame(s, &pkt, ost);
1227
1228             /* if two pass, output log */
1229             if (ost->logfile && enc->stats_out) {
1230                 fprintf(ost->logfile, "%s", enc->stats_out);
1231             }
1232         }
1233     }
1234     ost->sync_opts++;
1235     /*
1236      * For video, number of frames in == number of packets out.
1237      * But there may be reordering, so we can't throw away frames on encoder
1238      * flush, we need to limit them here, before they go into encoder.
1239      */
1240     ost->frame_number++;
1241
1242     if (vstats_filename && frame_size)
1243         do_video_stats(ost, frame_size);
1244   }
1245
1246     if (!ost->last_frame)
1247         ost->last_frame = av_frame_alloc();
1248     av_frame_unref(ost->last_frame);
1249     if (next_picture && ost->last_frame)
1250         av_frame_ref(ost->last_frame, next_picture);
1251     else
1252         av_frame_free(&ost->last_frame);
1253 }
1254
1255 static double psnr(double d)
1256 {
1257     return -10.0 * log(d) / log(10.0);
1258 }
1259
1260 static void do_video_stats(OutputStream *ost, int frame_size)
1261 {
1262     AVCodecContext *enc;
1263     int frame_number;
1264     double ti1, bitrate, avg_bitrate;
1265
1266     /* this is executed just the first time do_video_stats is called */
1267     if (!vstats_file) {
1268         vstats_file = fopen(vstats_filename, "w");
1269         if (!vstats_file) {
1270             perror("fopen");
1271             exit_program(1);
1272         }
1273     }
1274
1275     enc = ost->enc_ctx;
1276     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1277         frame_number = ost->st->nb_frames;
1278         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number,
1279                 ost->quality / (float)FF_QP2LAMBDA);
1280
1281         if (ost->error[0]>=0 && (enc->flags & AV_CODEC_FLAG_PSNR))
1282             fprintf(vstats_file, "PSNR= %6.2f ", psnr(ost->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1283
1284         fprintf(vstats_file,"f_size= %6d ", frame_size);
1285         /* compute pts value */
1286         ti1 = av_stream_get_end_pts(ost->st) * av_q2d(ost->st->time_base);
1287         if (ti1 < 0.01)
1288             ti1 = 0.01;
1289
1290         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1291         avg_bitrate = (double)(ost->data_size * 8) / ti1 / 1000.0;
1292         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1293                (double)ost->data_size / 1024, ti1, bitrate, avg_bitrate);
1294         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(ost->pict_type));
1295     }
1296 }
1297
1298 static void finish_output_stream(OutputStream *ost)
1299 {
1300     OutputFile *of = output_files[ost->file_index];
1301     int i;
1302
1303     ost->finished = ENCODER_FINISHED | MUXER_FINISHED;
1304
1305     if (of->shortest) {
1306         for (i = 0; i < of->ctx->nb_streams; i++)
1307             output_streams[of->ost_index + i]->finished = ENCODER_FINISHED | MUXER_FINISHED;
1308     }
1309 }
1310
1311 /**
1312  * Get and encode new output from any of the filtergraphs, without causing
1313  * activity.
1314  *
1315  * @return  0 for success, <0 for severe errors
1316  */
1317 static int reap_filters(int flush)
1318 {
1319     AVFrame *filtered_frame = NULL;
1320     int i;
1321
1322     /* Reap all buffers present in the buffer sinks */
1323     for (i = 0; i < nb_output_streams; i++) {
1324         OutputStream *ost = output_streams[i];
1325         OutputFile    *of = output_files[ost->file_index];
1326         AVFilterContext *filter;
1327         AVCodecContext *enc = ost->enc_ctx;
1328         int ret = 0;
1329
1330         if (!ost->filter)
1331             continue;
1332         filter = ost->filter->filter;
1333
1334         if (!ost->filtered_frame && !(ost->filtered_frame = av_frame_alloc())) {
1335             return AVERROR(ENOMEM);
1336         }
1337         filtered_frame = ost->filtered_frame;
1338
1339         while (1) {
1340             double float_pts = AV_NOPTS_VALUE; // this is identical to filtered_frame.pts but with higher precision
1341             ret = av_buffersink_get_frame_flags(filter, filtered_frame,
1342                                                AV_BUFFERSINK_FLAG_NO_REQUEST);
1343             if (ret < 0) {
1344                 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1345                     av_log(NULL, AV_LOG_WARNING,
1346                            "Error in av_buffersink_get_frame_flags(): %s\n", av_err2str(ret));
1347                 } else if (flush && ret == AVERROR_EOF) {
1348                     if (filter->inputs[0]->type == AVMEDIA_TYPE_VIDEO)
1349                         do_video_out(of->ctx, ost, NULL, AV_NOPTS_VALUE);
1350                 }
1351                 break;
1352             }
1353             if (ost->finished) {
1354                 av_frame_unref(filtered_frame);
1355                 continue;
1356             }
1357             if (filtered_frame->pts != AV_NOPTS_VALUE) {
1358                 int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1359                 AVRational tb = enc->time_base;
1360                 int extra_bits = av_clip(29 - av_log2(tb.den), 0, 16);
1361
1362                 tb.den <<= extra_bits;
1363                 float_pts =
1364                     av_rescale_q(filtered_frame->pts, filter->inputs[0]->time_base, tb) -
1365                     av_rescale_q(start_time, AV_TIME_BASE_Q, tb);
1366                 float_pts /= 1 << extra_bits;
1367                 // avoid exact midoints to reduce the chance of rounding differences, this can be removed in case the fps code is changed to work with integers
1368                 float_pts += FFSIGN(float_pts) * 1.0 / (1<<17);
1369
1370                 filtered_frame->pts =
1371                     av_rescale_q(filtered_frame->pts, filter->inputs[0]->time_base, enc->time_base) -
1372                     av_rescale_q(start_time, AV_TIME_BASE_Q, enc->time_base);
1373             }
1374             //if (ost->source_index >= 0)
1375             //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1376
1377             switch (filter->inputs[0]->type) {
1378             case AVMEDIA_TYPE_VIDEO:
1379                 if (!ost->frame_aspect_ratio.num)
1380                     enc->sample_aspect_ratio = filtered_frame->sample_aspect_ratio;
1381
1382                 if (debug_ts) {
1383                     av_log(NULL, AV_LOG_INFO, "filter -> pts:%s pts_time:%s exact:%f time_base:%d/%d\n",
1384                             av_ts2str(filtered_frame->pts), av_ts2timestr(filtered_frame->pts, &enc->time_base),
1385                             float_pts,
1386                             enc->time_base.num, enc->time_base.den);
1387                 }
1388
1389                 do_video_out(of->ctx, ost, filtered_frame, float_pts);
1390                 break;
1391             case AVMEDIA_TYPE_AUDIO:
1392                 if (!(enc->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE) &&
1393                     enc->channels != av_frame_get_channels(filtered_frame)) {
1394                     av_log(NULL, AV_LOG_ERROR,
1395                            "Audio filter graph output is not normalized and encoder does not support parameter changes\n");
1396                     break;
1397                 }
1398                 do_audio_out(of->ctx, ost, filtered_frame);
1399                 break;
1400             default:
1401                 // TODO support subtitle filters
1402                 av_assert0(0);
1403             }
1404
1405             av_frame_unref(filtered_frame);
1406         }
1407     }
1408
1409     return 0;
1410 }
1411
1412 static void print_final_stats(int64_t total_size)
1413 {
1414     uint64_t video_size = 0, audio_size = 0, extra_size = 0, other_size = 0;
1415     uint64_t subtitle_size = 0;
1416     uint64_t data_size = 0;
1417     float percent = -1.0;
1418     int i, j;
1419     int pass1_used = 1;
1420
1421     for (i = 0; i < nb_output_streams; i++) {
1422         OutputStream *ost = output_streams[i];
1423         switch (ost->enc_ctx->codec_type) {
1424             case AVMEDIA_TYPE_VIDEO: video_size += ost->data_size; break;
1425             case AVMEDIA_TYPE_AUDIO: audio_size += ost->data_size; break;
1426             case AVMEDIA_TYPE_SUBTITLE: subtitle_size += ost->data_size; break;
1427             default:                 other_size += ost->data_size; break;
1428         }
1429         extra_size += ost->enc_ctx->extradata_size;
1430         data_size  += ost->data_size;
1431         if (   (ost->enc_ctx->flags & (AV_CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))
1432             != AV_CODEC_FLAG_PASS1)
1433             pass1_used = 0;
1434     }
1435
1436     if (data_size && total_size>0 && total_size >= data_size)
1437         percent = 100.0 * (total_size - data_size) / data_size;
1438
1439     av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB subtitle:%1.0fkB other streams:%1.0fkB global headers:%1.0fkB muxing overhead: ",
1440            video_size / 1024.0,
1441            audio_size / 1024.0,
1442            subtitle_size / 1024.0,
1443            other_size / 1024.0,
1444            extra_size / 1024.0);
1445     if (percent >= 0.0)
1446         av_log(NULL, AV_LOG_INFO, "%f%%", percent);
1447     else
1448         av_log(NULL, AV_LOG_INFO, "unknown");
1449     av_log(NULL, AV_LOG_INFO, "\n");
1450
1451     /* print verbose per-stream stats */
1452     for (i = 0; i < nb_input_files; i++) {
1453         InputFile *f = input_files[i];
1454         uint64_t total_packets = 0, total_size = 0;
1455
1456         av_log(NULL, AV_LOG_VERBOSE, "Input file #%d (%s):\n",
1457                i, f->ctx->filename);
1458
1459         for (j = 0; j < f->nb_streams; j++) {
1460             InputStream *ist = input_streams[f->ist_index + j];
1461             enum AVMediaType type = ist->dec_ctx->codec_type;
1462
1463             total_size    += ist->data_size;
1464             total_packets += ist->nb_packets;
1465
1466             av_log(NULL, AV_LOG_VERBOSE, "  Input stream #%d:%d (%s): ",
1467                    i, j, media_type_string(type));
1468             av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" packets read (%"PRIu64" bytes); ",
1469                    ist->nb_packets, ist->data_size);
1470
1471             if (ist->decoding_needed) {
1472                 av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" frames decoded",
1473                        ist->frames_decoded);
1474                 if (type == AVMEDIA_TYPE_AUDIO)
1475                     av_log(NULL, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ist->samples_decoded);
1476                 av_log(NULL, AV_LOG_VERBOSE, "; ");
1477             }
1478
1479             av_log(NULL, AV_LOG_VERBOSE, "\n");
1480         }
1481
1482         av_log(NULL, AV_LOG_VERBOSE, "  Total: %"PRIu64" packets (%"PRIu64" bytes) demuxed\n",
1483                total_packets, total_size);
1484     }
1485
1486     for (i = 0; i < nb_output_files; i++) {
1487         OutputFile *of = output_files[i];
1488         uint64_t total_packets = 0, total_size = 0;
1489
1490         av_log(NULL, AV_LOG_VERBOSE, "Output file #%d (%s):\n",
1491                i, of->ctx->filename);
1492
1493         for (j = 0; j < of->ctx->nb_streams; j++) {
1494             OutputStream *ost = output_streams[of->ost_index + j];
1495             enum AVMediaType type = ost->enc_ctx->codec_type;
1496
1497             total_size    += ost->data_size;
1498             total_packets += ost->packets_written;
1499
1500             av_log(NULL, AV_LOG_VERBOSE, "  Output stream #%d:%d (%s): ",
1501                    i, j, media_type_string(type));
1502             if (ost->encoding_needed) {
1503                 av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" frames encoded",
1504                        ost->frames_encoded);
1505                 if (type == AVMEDIA_TYPE_AUDIO)
1506                     av_log(NULL, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ost->samples_encoded);
1507                 av_log(NULL, AV_LOG_VERBOSE, "; ");
1508             }
1509
1510             av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" packets muxed (%"PRIu64" bytes); ",
1511                    ost->packets_written, ost->data_size);
1512
1513             av_log(NULL, AV_LOG_VERBOSE, "\n");
1514         }
1515
1516         av_log(NULL, AV_LOG_VERBOSE, "  Total: %"PRIu64" packets (%"PRIu64" bytes) muxed\n",
1517                total_packets, total_size);
1518     }
1519     if(video_size + data_size + audio_size + subtitle_size + extra_size == 0){
1520         av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded ");
1521         if (pass1_used) {
1522             av_log(NULL, AV_LOG_WARNING, "\n");
1523         } else {
1524             av_log(NULL, AV_LOG_WARNING, "(check -ss / -t / -frames parameters if used)\n");
1525         }
1526     }
1527 }
1528
1529 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
1530 {
1531     char buf[1024];
1532     AVBPrint buf_script;
1533     OutputStream *ost;
1534     AVFormatContext *oc;
1535     int64_t total_size;
1536     AVCodecContext *enc;
1537     int frame_number, vid, i;
1538     double bitrate;
1539     int64_t pts = INT64_MIN;
1540     static int64_t last_time = -1;
1541     static int qp_histogram[52];
1542     int hours, mins, secs, us;
1543
1544     if (!print_stats && !is_last_report && !progress_avio)
1545         return;
1546
1547     if (!is_last_report) {
1548         if (last_time == -1) {
1549             last_time = cur_time;
1550             return;
1551         }
1552         if ((cur_time - last_time) < 500000)
1553             return;
1554         last_time = cur_time;
1555     }
1556
1557
1558     oc = output_files[0]->ctx;
1559
1560     total_size = avio_size(oc->pb);
1561     if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
1562         total_size = avio_tell(oc->pb);
1563
1564     buf[0] = '\0';
1565     vid = 0;
1566     av_bprint_init(&buf_script, 0, 1);
1567     for (i = 0; i < nb_output_streams; i++) {
1568         float q = -1;
1569         ost = output_streams[i];
1570         enc = ost->enc_ctx;
1571         if (!ost->stream_copy)
1572             q = ost->quality / (float) FF_QP2LAMBDA;
1573
1574         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1575             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1576             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1577                        ost->file_index, ost->index, q);
1578         }
1579         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1580             float fps, t = (cur_time-timer_start) / 1000000.0;
1581
1582             frame_number = ost->frame_number;
1583             fps = t > 1 ? frame_number / t : 0;
1584             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
1585                      frame_number, fps < 9.95, fps, q);
1586             av_bprintf(&buf_script, "frame=%d\n", frame_number);
1587             av_bprintf(&buf_script, "fps=%.1f\n", fps);
1588             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1589                        ost->file_index, ost->index, q);
1590             if (is_last_report)
1591                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1592             if (qp_hist) {
1593                 int j;
1594                 int qp = lrintf(q);
1595                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1596                     qp_histogram[qp]++;
1597                 for (j = 0; j < 32; j++)
1598                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
1599             }
1600
1601             if ((enc->flags & AV_CODEC_FLAG_PSNR) && (ost->pict_type != AV_PICTURE_TYPE_NONE || is_last_report)) {
1602                 int j;
1603                 double error, error_sum = 0;
1604                 double scale, scale_sum = 0;
1605                 double p;
1606                 char type[3] = { 'Y','U','V' };
1607                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1608                 for (j = 0; j < 3; j++) {
1609                     if (is_last_report) {
1610                         error = enc->error[j];
1611                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1612                     } else {
1613                         error = ost->error[j];
1614                         scale = enc->width * enc->height * 255.0 * 255.0;
1615                     }
1616                     if (j)
1617                         scale /= 4;
1618                     error_sum += error;
1619                     scale_sum += scale;
1620                     p = psnr(error / scale);
1621                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], p);
1622                     av_bprintf(&buf_script, "stream_%d_%d_psnr_%c=%2.2f\n",
1623                                ost->file_index, ost->index, type[j] | 32, p);
1624                 }
1625                 p = psnr(error_sum / scale_sum);
1626                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1627                 av_bprintf(&buf_script, "stream_%d_%d_psnr_all=%2.2f\n",
1628                            ost->file_index, ost->index, p);
1629             }
1630             vid = 1;
1631         }
1632         /* compute min output value */
1633         if (av_stream_get_end_pts(ost->st) != AV_NOPTS_VALUE)
1634             pts = FFMAX(pts, av_rescale_q(av_stream_get_end_pts(ost->st),
1635                                           ost->st->time_base, AV_TIME_BASE_Q));
1636         if (is_last_report)
1637             nb_frames_drop += ost->last_droped;
1638     }
1639
1640     secs = FFABS(pts) / AV_TIME_BASE;
1641     us = FFABS(pts) % AV_TIME_BASE;
1642     mins = secs / 60;
1643     secs %= 60;
1644     hours = mins / 60;
1645     mins %= 60;
1646
1647     bitrate = pts && total_size >= 0 ? total_size * 8 / (pts / 1000.0) : -1;
1648
1649     if (total_size < 0) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1650                                  "size=N/A time=");
1651     else                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1652                                  "size=%8.0fkB time=", total_size / 1024.0);
1653     if (pts < 0)
1654         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "-");
1655     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1656              "%02d:%02d:%02d.%02d ", hours, mins, secs,
1657              (100 * us) / AV_TIME_BASE);
1658
1659     if (bitrate < 0) {
1660         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),"bitrate=N/A");
1661         av_bprintf(&buf_script, "bitrate=N/A\n");
1662     }else{
1663         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),"bitrate=%6.1fkbits/s", bitrate);
1664         av_bprintf(&buf_script, "bitrate=%6.1fkbits/s\n", bitrate);
1665     }
1666
1667     if (total_size < 0) av_bprintf(&buf_script, "total_size=N/A\n");
1668     else                av_bprintf(&buf_script, "total_size=%"PRId64"\n", total_size);
1669     av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
1670     av_bprintf(&buf_script, "out_time=%02d:%02d:%02d.%06d\n",
1671                hours, mins, secs, us);
1672
1673     if (nb_frames_dup || nb_frames_drop)
1674         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1675                 nb_frames_dup, nb_frames_drop);
1676     av_bprintf(&buf_script, "dup_frames=%d\n", nb_frames_dup);
1677     av_bprintf(&buf_script, "drop_frames=%d\n", nb_frames_drop);
1678
1679     if (print_stats || is_last_report) {
1680         const char end = is_last_report ? '\n' : '\r';
1681         if (print_stats==1 && AV_LOG_INFO > av_log_get_level()) {
1682             fprintf(stderr, "%s    %c", buf, end);
1683         } else
1684             av_log(NULL, AV_LOG_INFO, "%s    %c", buf, end);
1685
1686     fflush(stderr);
1687     }
1688
1689     if (progress_avio) {
1690         av_bprintf(&buf_script, "progress=%s\n",
1691                    is_last_report ? "end" : "continue");
1692         avio_write(progress_avio, buf_script.str,
1693                    FFMIN(buf_script.len, buf_script.size - 1));
1694         avio_flush(progress_avio);
1695         av_bprint_finalize(&buf_script, NULL);
1696         if (is_last_report) {
1697             avio_closep(&progress_avio);
1698         }
1699     }
1700
1701     if (is_last_report)
1702         print_final_stats(total_size);
1703 }
1704
1705 static void flush_encoders(void)
1706 {
1707     int i, ret;
1708
1709     for (i = 0; i < nb_output_streams; i++) {
1710         OutputStream   *ost = output_streams[i];
1711         AVCodecContext *enc = ost->enc_ctx;
1712         AVFormatContext *os = output_files[ost->file_index]->ctx;
1713         int stop_encoding = 0;
1714
1715         if (!ost->encoding_needed)
1716             continue;
1717
1718         if (enc->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1719             continue;
1720         if (enc->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
1721             continue;
1722
1723         for (;;) {
1724             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1725             const char *desc;
1726
1727             switch (enc->codec_type) {
1728             case AVMEDIA_TYPE_AUDIO:
1729                 encode = avcodec_encode_audio2;
1730                 desc   = "Audio";
1731                 break;
1732             case AVMEDIA_TYPE_VIDEO:
1733                 encode = avcodec_encode_video2;
1734                 desc   = "Video";
1735                 break;
1736             default:
1737                 stop_encoding = 1;
1738             }
1739
1740             if (encode) {
1741                 AVPacket pkt;
1742                 int pkt_size;
1743                 int got_packet;
1744                 av_init_packet(&pkt);
1745                 pkt.data = NULL;
1746                 pkt.size = 0;
1747
1748                 update_benchmark(NULL);
1749                 ret = encode(enc, &pkt, NULL, &got_packet);
1750                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
1751                 if (ret < 0) {
1752                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed: %s\n",
1753                            desc,
1754                            av_err2str(ret));
1755                     exit_program(1);
1756                 }
1757                 if (ost->logfile && enc->stats_out) {
1758                     fprintf(ost->logfile, "%s", enc->stats_out);
1759                 }
1760                 if (!got_packet) {
1761                     stop_encoding = 1;
1762                     break;
1763                 }
1764                 if (ost->finished & MUXER_FINISHED) {
1765                     av_free_packet(&pkt);
1766                     continue;
1767                 }
1768                 av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
1769                 pkt_size = pkt.size;
1770                 write_frame(os, &pkt, ost);
1771                 if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO && vstats_filename) {
1772                     do_video_stats(ost, pkt_size);
1773                 }
1774             }
1775
1776             if (stop_encoding)
1777                 break;
1778         }
1779     }
1780 }
1781
1782 /*
1783  * Check whether a packet from ist should be written into ost at this time
1784  */
1785 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1786 {
1787     OutputFile *of = output_files[ost->file_index];
1788     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1789
1790     if (ost->source_index != ist_index)
1791         return 0;
1792
1793     if (ost->finished)
1794         return 0;
1795
1796     if (of->start_time != AV_NOPTS_VALUE && ist->pts < of->start_time)
1797         return 0;
1798
1799     return 1;
1800 }
1801
1802 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1803 {
1804     OutputFile *of = output_files[ost->file_index];
1805     InputFile   *f = input_files [ist->file_index];
1806     int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1807     int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);
1808     int64_t ist_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ist->st->time_base);
1809     AVPicture pict;
1810     AVPacket opkt;
1811
1812     av_init_packet(&opkt);
1813
1814     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1815         !ost->copy_initial_nonkeyframes)
1816         return;
1817
1818     if (pkt->pts == AV_NOPTS_VALUE) {
1819         if (!ost->frame_number && ist->pts < start_time &&
1820             !ost->copy_prior_start)
1821             return;
1822     } else {
1823         if (!ost->frame_number && pkt->pts < ist_tb_start_time &&
1824             !ost->copy_prior_start)
1825             return;
1826     }
1827
1828     if (of->recording_time != INT64_MAX &&
1829         ist->pts >= of->recording_time + start_time) {
1830         close_output_stream(ost);
1831         return;
1832     }
1833
1834     if (f->recording_time != INT64_MAX) {
1835         start_time = f->ctx->start_time;
1836         if (f->start_time != AV_NOPTS_VALUE)
1837             start_time += f->start_time;
1838         if (ist->pts >= f->recording_time + start_time) {
1839             close_output_stream(ost);
1840             return;
1841         }
1842     }
1843
1844     /* force the input stream PTS */
1845     if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO)
1846         ost->sync_opts++;
1847
1848     if (pkt->pts != AV_NOPTS_VALUE)
1849         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1850     else
1851         opkt.pts = AV_NOPTS_VALUE;
1852
1853     if (pkt->dts == AV_NOPTS_VALUE)
1854         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
1855     else
1856         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1857     opkt.dts -= ost_tb_start_time;
1858
1859     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1860         int duration = av_get_audio_frame_duration(ist->dec_ctx, pkt->size);
1861         if(!duration)
1862             duration = ist->dec_ctx->frame_size;
1863         opkt.dts = opkt.pts = av_rescale_delta(ist->st->time_base, pkt->dts,
1864                                                (AVRational){1, ist->dec_ctx->sample_rate}, duration, &ist->filter_in_rescale_delta_last,
1865                                                ost->st->time_base) - ost_tb_start_time;
1866     }
1867
1868     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1869     opkt.flags    = pkt->flags;
1870     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1871     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1872        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1873        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1874        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1875        ) {
1876         int ret = av_parser_change(ost->parser, ost->st->codec,
1877                              &opkt.data, &opkt.size,
1878                              pkt->data, pkt->size,
1879                              pkt->flags & AV_PKT_FLAG_KEY);
1880         if (ret < 0) {
1881             av_log(NULL, AV_LOG_FATAL, "av_parser_change failed: %s\n",
1882                    av_err2str(ret));
1883             exit_program(1);
1884         }
1885         if (ret) {
1886             opkt.buf = av_buffer_create(opkt.data, opkt.size, av_buffer_default_free, NULL, 0);
1887             if (!opkt.buf)
1888                 exit_program(1);
1889         }
1890     } else {
1891         opkt.data = pkt->data;
1892         opkt.size = pkt->size;
1893     }
1894     av_copy_packet_side_data(&opkt, pkt);
1895
1896     if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1897         ost->st->codec->codec_id == AV_CODEC_ID_RAWVIDEO &&
1898         (of->ctx->oformat->flags & AVFMT_RAWPICTURE)) {
1899         /* store AVPicture in AVPacket, as expected by the output format */
1900         int ret = avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
1901         if (ret < 0) {
1902             av_log(NULL, AV_LOG_FATAL, "avpicture_fill failed: %s\n",
1903                    av_err2str(ret));
1904             exit_program(1);
1905         }
1906         opkt.data = (uint8_t *)&pict;
1907         opkt.size = sizeof(AVPicture);
1908         opkt.flags |= AV_PKT_FLAG_KEY;
1909     }
1910
1911     write_frame(of->ctx, &opkt, ost);
1912 }
1913
1914 int guess_input_channel_layout(InputStream *ist)
1915 {
1916     AVCodecContext *dec = ist->dec_ctx;
1917
1918     if (!dec->channel_layout) {
1919         char layout_name[256];
1920
1921         if (dec->channels > ist->guess_layout_max)
1922             return 0;
1923         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1924         if (!dec->channel_layout)
1925             return 0;
1926         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1927                                      dec->channels, dec->channel_layout);
1928         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1929                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1930     }
1931     return 1;
1932 }
1933
1934 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1935 {
1936     AVFrame *decoded_frame, *f;
1937     AVCodecContext *avctx = ist->dec_ctx;
1938     int i, ret, err = 0, resample_changed;
1939     AVRational decoded_frame_tb;
1940
1941     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1942         return AVERROR(ENOMEM);
1943     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1944         return AVERROR(ENOMEM);
1945     decoded_frame = ist->decoded_frame;
1946
1947     update_benchmark(NULL);
1948     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1949     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
1950
1951     if (ret >= 0 && avctx->sample_rate <= 0) {
1952         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
1953         ret = AVERROR_INVALIDDATA;
1954     }
1955
1956     if (*got_output || ret<0)
1957         decode_error_stat[ret<0] ++;
1958
1959     if (ret < 0 && exit_on_error)
1960         exit_program(1);
1961
1962     if (!*got_output || ret < 0)
1963         return ret;
1964
1965     ist->samples_decoded += decoded_frame->nb_samples;
1966     ist->frames_decoded++;
1967
1968 #if 1
1969     /* increment next_dts to use for the case where the input stream does not
1970        have timestamps or there are multiple frames in the packet */
1971     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1972                      avctx->sample_rate;
1973     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1974                      avctx->sample_rate;
1975 #endif
1976
1977     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1978                        ist->resample_channels       != avctx->channels               ||
1979                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1980                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1981     if (resample_changed) {
1982         char layout1[64], layout2[64];
1983
1984         if (!guess_input_channel_layout(ist)) {
1985             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1986                    "layout for Input Stream #%d.%d\n", ist->file_index,
1987                    ist->st->index);
1988             exit_program(1);
1989         }
1990         decoded_frame->channel_layout = avctx->channel_layout;
1991
1992         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1993                                      ist->resample_channel_layout);
1994         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1995                                      decoded_frame->channel_layout);
1996
1997         av_log(NULL, AV_LOG_INFO,
1998                "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",
1999                ist->file_index, ist->st->index,
2000                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2001                ist->resample_channels, layout1,
2002                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2003                avctx->channels, layout2);
2004
2005         ist->resample_sample_fmt     = decoded_frame->format;
2006         ist->resample_sample_rate    = decoded_frame->sample_rate;
2007         ist->resample_channel_layout = decoded_frame->channel_layout;
2008         ist->resample_channels       = avctx->channels;
2009
2010         for (i = 0; i < nb_filtergraphs; i++)
2011             if (ist_in_filtergraph(filtergraphs[i], ist)) {
2012                 FilterGraph *fg = filtergraphs[i];
2013                 if (configure_filtergraph(fg) < 0) {
2014                     av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2015                     exit_program(1);
2016                 }
2017             }
2018     }
2019
2020     /* if the decoder provides a pts, use it instead of the last packet pts.
2021        the decoder could be delaying output by a packet or more. */
2022     if (decoded_frame->pts != AV_NOPTS_VALUE) {
2023         ist->dts = ist->next_dts = ist->pts = ist->next_pts = av_rescale_q(decoded_frame->pts, avctx->time_base, AV_TIME_BASE_Q);
2024         decoded_frame_tb   = avctx->time_base;
2025     } else if (decoded_frame->pkt_pts != AV_NOPTS_VALUE) {
2026         decoded_frame->pts = decoded_frame->pkt_pts;
2027         decoded_frame_tb   = ist->st->time_base;
2028     } else if (pkt->pts != AV_NOPTS_VALUE) {
2029         decoded_frame->pts = pkt->pts;
2030         decoded_frame_tb   = ist->st->time_base;
2031     }else {
2032         decoded_frame->pts = ist->dts;
2033         decoded_frame_tb   = AV_TIME_BASE_Q;
2034     }
2035     pkt->pts           = AV_NOPTS_VALUE;
2036     if (decoded_frame->pts != AV_NOPTS_VALUE)
2037         decoded_frame->pts = av_rescale_delta(decoded_frame_tb, decoded_frame->pts,
2038                                               (AVRational){1, avctx->sample_rate}, decoded_frame->nb_samples, &ist->filter_in_rescale_delta_last,
2039                                               (AVRational){1, avctx->sample_rate});
2040     for (i = 0; i < ist->nb_filters; i++) {
2041         if (i < ist->nb_filters - 1) {
2042             f = ist->filter_frame;
2043             err = av_frame_ref(f, decoded_frame);
2044             if (err < 0)
2045                 break;
2046         } else
2047             f = decoded_frame;
2048         err = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f,
2049                                      AV_BUFFERSRC_FLAG_PUSH);
2050         if (err == AVERROR_EOF)
2051             err = 0; /* ignore */
2052         if (err < 0)
2053             break;
2054     }
2055     decoded_frame->pts = AV_NOPTS_VALUE;
2056
2057     av_frame_unref(ist->filter_frame);
2058     av_frame_unref(decoded_frame);
2059     return err < 0 ? err : ret;
2060 }
2061
2062 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
2063 {
2064     AVFrame *decoded_frame, *f;
2065     int i, ret = 0, err = 0, resample_changed;
2066     int64_t best_effort_timestamp;
2067     AVRational *frame_sample_aspect;
2068
2069     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
2070         return AVERROR(ENOMEM);
2071     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
2072         return AVERROR(ENOMEM);
2073     decoded_frame = ist->decoded_frame;
2074     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
2075
2076     update_benchmark(NULL);
2077     ret = avcodec_decode_video2(ist->dec_ctx,
2078                                 decoded_frame, got_output, pkt);
2079     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
2080
2081     // The following line may be required in some cases where there is no parser
2082     // or the parser does not has_b_frames correctly
2083     if (ist->st->codec->has_b_frames < ist->dec_ctx->has_b_frames) {
2084         if (ist->dec_ctx->codec_id == AV_CODEC_ID_H264) {
2085             ist->st->codec->has_b_frames = ist->dec_ctx->has_b_frames;
2086         } else
2087             av_log(ist->dec_ctx, AV_LOG_WARNING,
2088                    "has_b_frames is larger in decoder than demuxer %d > %d.\n"
2089                    "If you want to help, upload a sample "
2090                    "of this file to ftp://upload.ffmpeg.org/incoming/ "
2091                    "and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)",
2092                    ist->dec_ctx->has_b_frames,
2093                    ist->st->codec->has_b_frames);
2094     }
2095
2096     if (*got_output || ret<0)
2097         decode_error_stat[ret<0] ++;
2098
2099     if (ret < 0 && exit_on_error)
2100         exit_program(1);
2101
2102     if (*got_output && ret >= 0) {
2103         if (ist->dec_ctx->width  != decoded_frame->width ||
2104             ist->dec_ctx->height != decoded_frame->height ||
2105             ist->dec_ctx->pix_fmt != decoded_frame->format) {
2106             av_log(NULL, AV_LOG_DEBUG, "Frame parameters mismatch context %d,%d,%d != %d,%d,%d\n",
2107                 decoded_frame->width,
2108                 decoded_frame->height,
2109                 decoded_frame->format,
2110                 ist->dec_ctx->width,
2111                 ist->dec_ctx->height,
2112                 ist->dec_ctx->pix_fmt);
2113         }
2114     }
2115
2116     if (!*got_output || ret < 0)
2117         return ret;
2118
2119     if(ist->top_field_first>=0)
2120         decoded_frame->top_field_first = ist->top_field_first;
2121
2122     ist->frames_decoded++;
2123
2124     if (ist->hwaccel_retrieve_data && decoded_frame->format == ist->hwaccel_pix_fmt) {
2125         err = ist->hwaccel_retrieve_data(ist->dec_ctx, decoded_frame);
2126         if (err < 0)
2127             goto fail;
2128     }
2129     ist->hwaccel_retrieved_pix_fmt = decoded_frame->format;
2130
2131     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
2132     if(best_effort_timestamp != AV_NOPTS_VALUE)
2133         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
2134
2135     if (debug_ts) {
2136         av_log(NULL, AV_LOG_INFO, "decoder -> ist_index:%d type:video "
2137                "frame_pts:%s frame_pts_time:%s best_effort_ts:%"PRId64" best_effort_ts_time:%s keyframe:%d frame_type:%d time_base:%d/%d\n",
2138                ist->st->index, av_ts2str(decoded_frame->pts),
2139                av_ts2timestr(decoded_frame->pts, &ist->st->time_base),
2140                best_effort_timestamp,
2141                av_ts2timestr(best_effort_timestamp, &ist->st->time_base),
2142                decoded_frame->key_frame, decoded_frame->pict_type,
2143                ist->st->time_base.num, ist->st->time_base.den);
2144     }
2145
2146     pkt->size = 0;
2147
2148     if (ist->st->sample_aspect_ratio.num)
2149         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2150
2151     resample_changed = ist->resample_width   != decoded_frame->width  ||
2152                        ist->resample_height  != decoded_frame->height ||
2153                        ist->resample_pix_fmt != decoded_frame->format;
2154     if (resample_changed) {
2155         av_log(NULL, AV_LOG_INFO,
2156                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2157                ist->file_index, ist->st->index,
2158                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2159                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2160
2161         ist->resample_width   = decoded_frame->width;
2162         ist->resample_height  = decoded_frame->height;
2163         ist->resample_pix_fmt = decoded_frame->format;
2164
2165         for (i = 0; i < nb_filtergraphs; i++) {
2166             if (ist_in_filtergraph(filtergraphs[i], ist) && ist->reinit_filters &&
2167                 configure_filtergraph(filtergraphs[i]) < 0) {
2168                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2169                 exit_program(1);
2170             }
2171         }
2172     }
2173
2174     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2175     for (i = 0; i < ist->nb_filters; i++) {
2176         if (!frame_sample_aspect->num)
2177             *frame_sample_aspect = ist->st->sample_aspect_ratio;
2178
2179         if (i < ist->nb_filters - 1) {
2180             f = ist->filter_frame;
2181             err = av_frame_ref(f, decoded_frame);
2182             if (err < 0)
2183                 break;
2184         } else
2185             f = decoded_frame;
2186         ret = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f, AV_BUFFERSRC_FLAG_PUSH);
2187         if (ret == AVERROR_EOF) {
2188             ret = 0; /* ignore */
2189         } else if (ret < 0) {
2190             av_log(NULL, AV_LOG_FATAL,
2191                    "Failed to inject frame into filter network: %s\n", av_err2str(ret));
2192             exit_program(1);
2193         }
2194     }
2195
2196 fail:
2197     av_frame_unref(ist->filter_frame);
2198     av_frame_unref(decoded_frame);
2199     return err < 0 ? err : ret;
2200 }
2201
2202 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2203 {
2204     AVSubtitle subtitle;
2205     int i, ret = avcodec_decode_subtitle2(ist->dec_ctx,
2206                                           &subtitle, got_output, pkt);
2207
2208     if (*got_output || ret<0)
2209         decode_error_stat[ret<0] ++;
2210
2211     if (ret < 0 && exit_on_error)
2212         exit_program(1);
2213
2214     if (ret < 0 || !*got_output) {
2215         if (!pkt->size)
2216             sub2video_flush(ist);
2217         return ret;
2218     }
2219
2220     if (ist->fix_sub_duration) {
2221         int end = 1;
2222         if (ist->prev_sub.got_output) {
2223             end = av_rescale(subtitle.pts - ist->prev_sub.subtitle.pts,
2224                              1000, AV_TIME_BASE);
2225             if (end < ist->prev_sub.subtitle.end_display_time) {
2226                 av_log(ist->dec_ctx, AV_LOG_DEBUG,
2227                        "Subtitle duration reduced from %d to %d%s\n",
2228                        ist->prev_sub.subtitle.end_display_time, end,
2229                        end <= 0 ? ", dropping it" : "");
2230                 ist->prev_sub.subtitle.end_display_time = end;
2231             }
2232         }
2233         FFSWAP(int,        *got_output, ist->prev_sub.got_output);
2234         FFSWAP(int,        ret,         ist->prev_sub.ret);
2235         FFSWAP(AVSubtitle, subtitle,    ist->prev_sub.subtitle);
2236         if (end <= 0)
2237             goto out;
2238     }
2239
2240     if (!*got_output)
2241         return ret;
2242
2243     sub2video_update(ist, &subtitle);
2244
2245     if (!subtitle.num_rects)
2246         goto out;
2247
2248     ist->frames_decoded++;
2249
2250     for (i = 0; i < nb_output_streams; i++) {
2251         OutputStream *ost = output_streams[i];
2252
2253         if (!check_output_constraints(ist, ost) || !ost->encoding_needed
2254             || ost->enc->type != AVMEDIA_TYPE_SUBTITLE)
2255             continue;
2256
2257         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle);
2258     }
2259
2260 out:
2261     avsubtitle_free(&subtitle);
2262     return ret;
2263 }
2264
2265 static int send_filter_eof(InputStream *ist)
2266 {
2267     int i, ret;
2268     for (i = 0; i < ist->nb_filters; i++) {
2269         ret = av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
2270         if (ret < 0)
2271             return ret;
2272     }
2273     return 0;
2274 }
2275
2276 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2277 static int process_input_packet(InputStream *ist, const AVPacket *pkt)
2278 {
2279     int ret = 0, i;
2280     int got_output = 0;
2281
2282     AVPacket avpkt;
2283     if (!ist->saw_first_ts) {
2284         ist->dts = ist->st->avg_frame_rate.num ? - ist->dec_ctx->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
2285         ist->pts = 0;
2286         if (pkt && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
2287             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2288             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
2289         }
2290         ist->saw_first_ts = 1;
2291     }
2292
2293     if (ist->next_dts == AV_NOPTS_VALUE)
2294         ist->next_dts = ist->dts;
2295     if (ist->next_pts == AV_NOPTS_VALUE)
2296         ist->next_pts = ist->pts;
2297
2298     if (!pkt) {
2299         /* EOF handling */
2300         av_init_packet(&avpkt);
2301         avpkt.data = NULL;
2302         avpkt.size = 0;
2303         goto handle_eof;
2304     } else {
2305         avpkt = *pkt;
2306     }
2307
2308     if (pkt->dts != AV_NOPTS_VALUE) {
2309         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2310         if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2311             ist->next_pts = ist->pts = ist->dts;
2312     }
2313
2314     // while we have more to decode or while the decoder did output something on EOF
2315     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2316         int duration;
2317     handle_eof:
2318
2319         ist->pts = ist->next_pts;
2320         ist->dts = ist->next_dts;
2321
2322         if (avpkt.size && avpkt.size != pkt->size &&
2323             !(ist->dec->capabilities & AV_CODEC_CAP_SUBFRAMES)) {
2324             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2325                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2326             ist->showed_multi_packet_warning = 1;
2327         }
2328
2329         switch (ist->dec_ctx->codec_type) {
2330         case AVMEDIA_TYPE_AUDIO:
2331             ret = decode_audio    (ist, &avpkt, &got_output);
2332             break;
2333         case AVMEDIA_TYPE_VIDEO:
2334             ret = decode_video    (ist, &avpkt, &got_output);
2335             if (avpkt.duration) {
2336                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2337             } else if(ist->dec_ctx->framerate.num != 0 && ist->dec_ctx->framerate.den != 0) {
2338                 int ticks= av_stream_get_parser(ist->st) ? av_stream_get_parser(ist->st)->repeat_pict+1 : ist->dec_ctx->ticks_per_frame;
2339                 duration = ((int64_t)AV_TIME_BASE *
2340                                 ist->dec_ctx->framerate.den * ticks) /
2341                                 ist->dec_ctx->framerate.num / ist->dec_ctx->ticks_per_frame;
2342             } else
2343                 duration = 0;
2344
2345             if(ist->dts != AV_NOPTS_VALUE && duration) {
2346                 ist->next_dts += duration;
2347             }else
2348                 ist->next_dts = AV_NOPTS_VALUE;
2349
2350             if (got_output)
2351                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
2352             break;
2353         case AVMEDIA_TYPE_SUBTITLE:
2354             ret = transcode_subtitles(ist, &avpkt, &got_output);
2355             break;
2356         default:
2357             return -1;
2358         }
2359
2360         if (ret < 0) {
2361             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d: %s\n",
2362                    ist->file_index, ist->st->index, av_err2str(ret));
2363             if (exit_on_error)
2364                 exit_program(1);
2365             break;
2366         }
2367
2368         avpkt.dts=
2369         avpkt.pts= AV_NOPTS_VALUE;
2370
2371         // touch data and size only if not EOF
2372         if (pkt) {
2373             if(ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO)
2374                 ret = avpkt.size;
2375             avpkt.data += ret;
2376             avpkt.size -= ret;
2377         }
2378         if (!got_output) {
2379             continue;
2380         }
2381         if (got_output && !pkt)
2382             break;
2383     }
2384
2385     /* after flushing, send an EOF on all the filter inputs attached to the stream */
2386     if (!pkt && ist->decoding_needed && !got_output) {
2387         int ret = send_filter_eof(ist);
2388         if (ret < 0) {
2389             av_log(NULL, AV_LOG_FATAL, "Error marking filters as finished\n");
2390             exit_program(1);
2391         }
2392     }
2393
2394     /* handle stream copy */
2395     if (!ist->decoding_needed) {
2396         ist->dts = ist->next_dts;
2397         switch (ist->dec_ctx->codec_type) {
2398         case AVMEDIA_TYPE_AUDIO:
2399             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->dec_ctx->frame_size) /
2400                              ist->dec_ctx->sample_rate;
2401             break;
2402         case AVMEDIA_TYPE_VIDEO:
2403             if (ist->framerate.num) {
2404                 // TODO: Remove work-around for c99-to-c89 issue 7
2405                 AVRational time_base_q = AV_TIME_BASE_Q;
2406                 int64_t next_dts = av_rescale_q(ist->next_dts, time_base_q, av_inv_q(ist->framerate));
2407                 ist->next_dts = av_rescale_q(next_dts + 1, av_inv_q(ist->framerate), time_base_q);
2408             } else if (pkt->duration) {
2409                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2410             } else if(ist->dec_ctx->framerate.num != 0) {
2411                 int ticks= av_stream_get_parser(ist->st) ? av_stream_get_parser(ist->st)->repeat_pict + 1 : ist->dec_ctx->ticks_per_frame;
2412                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2413                                   ist->dec_ctx->framerate.den * ticks) /
2414                                   ist->dec_ctx->framerate.num / ist->dec_ctx->ticks_per_frame;
2415             }
2416             break;
2417         }
2418         ist->pts = ist->dts;
2419         ist->next_pts = ist->next_dts;
2420     }
2421     for (i = 0; pkt && i < nb_output_streams; i++) {
2422         OutputStream *ost = output_streams[i];
2423
2424         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2425             continue;
2426
2427         do_streamcopy(ist, ost, pkt);
2428     }
2429
2430     return got_output;
2431 }
2432
2433 static void print_sdp(void)
2434 {
2435     char sdp[16384];
2436     int i;
2437     int j;
2438     AVIOContext *sdp_pb;
2439     AVFormatContext **avc = av_malloc_array(nb_output_files, sizeof(*avc));
2440
2441     if (!avc)
2442         exit_program(1);
2443     for (i = 0, j = 0; i < nb_output_files; i++) {
2444         if (!strcmp(output_files[i]->ctx->oformat->name, "rtp")) {
2445             avc[j] = output_files[i]->ctx;
2446             j++;
2447         }
2448     }
2449
2450     av_sdp_create(avc, j, sdp, sizeof(sdp));
2451
2452     if (!sdp_filename) {
2453         printf("SDP:\n%s\n", sdp);
2454         fflush(stdout);
2455     } else {
2456         if (avio_open2(&sdp_pb, sdp_filename, AVIO_FLAG_WRITE, &int_cb, NULL) < 0) {
2457             av_log(NULL, AV_LOG_ERROR, "Failed to open sdp file '%s'\n", sdp_filename);
2458         } else {
2459             avio_printf(sdp_pb, "SDP:\n%s", sdp);
2460             avio_closep(&sdp_pb);
2461             av_freep(&sdp_filename);
2462         }
2463     }
2464
2465     av_freep(&avc);
2466 }
2467
2468 static const HWAccel *get_hwaccel(enum AVPixelFormat pix_fmt)
2469 {
2470     int i;
2471     for (i = 0; hwaccels[i].name; i++)
2472         if (hwaccels[i].pix_fmt == pix_fmt)
2473             return &hwaccels[i];
2474     return NULL;
2475 }
2476
2477 static enum AVPixelFormat get_format(AVCodecContext *s, const enum AVPixelFormat *pix_fmts)
2478 {
2479     InputStream *ist = s->opaque;
2480     const enum AVPixelFormat *p;
2481     int ret;
2482
2483     for (p = pix_fmts; *p != -1; p++) {
2484         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(*p);
2485         const HWAccel *hwaccel;
2486
2487         if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
2488             break;
2489
2490         hwaccel = get_hwaccel(*p);
2491         if (!hwaccel ||
2492             (ist->active_hwaccel_id && ist->active_hwaccel_id != hwaccel->id) ||
2493             (ist->hwaccel_id != HWACCEL_AUTO && ist->hwaccel_id != hwaccel->id))
2494             continue;
2495
2496         ret = hwaccel->init(s);
2497         if (ret < 0) {
2498             if (ist->hwaccel_id == hwaccel->id) {
2499                 av_log(NULL, AV_LOG_FATAL,
2500                        "%s hwaccel requested for input stream #%d:%d, "
2501                        "but cannot be initialized.\n", hwaccel->name,
2502                        ist->file_index, ist->st->index);
2503                 return AV_PIX_FMT_NONE;
2504             }
2505             continue;
2506         }
2507         ist->active_hwaccel_id = hwaccel->id;
2508         ist->hwaccel_pix_fmt   = *p;
2509         break;
2510     }
2511
2512     return *p;
2513 }
2514
2515 static int get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
2516 {
2517     InputStream *ist = s->opaque;
2518
2519     if (ist->hwaccel_get_buffer && frame->format == ist->hwaccel_pix_fmt)
2520         return ist->hwaccel_get_buffer(s, frame, flags);
2521
2522     return avcodec_default_get_buffer2(s, frame, flags);
2523 }
2524
2525 static int init_input_stream(int ist_index, char *error, int error_len)
2526 {
2527     int ret;
2528     InputStream *ist = input_streams[ist_index];
2529
2530     if (ist->decoding_needed) {
2531         AVCodec *codec = ist->dec;
2532         if (!codec) {
2533             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2534                     avcodec_get_name(ist->dec_ctx->codec_id), ist->file_index, ist->st->index);
2535             return AVERROR(EINVAL);
2536         }
2537
2538         ist->dec_ctx->opaque                = ist;
2539         ist->dec_ctx->get_format            = get_format;
2540         ist->dec_ctx->get_buffer2           = get_buffer;
2541         ist->dec_ctx->thread_safe_callbacks = 1;
2542
2543         av_opt_set_int(ist->dec_ctx, "refcounted_frames", 1, 0);
2544         if (ist->dec_ctx->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
2545            (ist->decoding_needed & DECODING_FOR_OST)) {
2546             av_dict_set(&ist->decoder_opts, "compute_edt", "1", AV_DICT_DONT_OVERWRITE);
2547             if (ist->decoding_needed & DECODING_FOR_FILTER)
2548                 av_log(NULL, AV_LOG_WARNING, "Warning using DVB subtitles for filtering and output at the same time is not fully supported, also see -compute_edt [0|1]\n");
2549         }
2550
2551         if (!av_dict_get(ist->decoder_opts, "threads", NULL, 0))
2552             av_dict_set(&ist->decoder_opts, "threads", "auto", 0);
2553         if ((ret = avcodec_open2(ist->dec_ctx, codec, &ist->decoder_opts)) < 0) {
2554             if (ret == AVERROR_EXPERIMENTAL)
2555                 abort_codec_experimental(codec, 0);
2556
2557             snprintf(error, error_len,
2558                      "Error while opening decoder for input stream "
2559                      "#%d:%d : %s",
2560                      ist->file_index, ist->st->index, av_err2str(ret));
2561             return ret;
2562         }
2563         assert_avoptions(ist->decoder_opts);
2564     }
2565
2566     ist->next_pts = AV_NOPTS_VALUE;
2567     ist->next_dts = AV_NOPTS_VALUE;
2568
2569     return 0;
2570 }
2571
2572 static InputStream *get_input_stream(OutputStream *ost)
2573 {
2574     if (ost->source_index >= 0)
2575         return input_streams[ost->source_index];
2576     return NULL;
2577 }
2578
2579 static int compare_int64(const void *a, const void *b)
2580 {
2581     int64_t va = *(int64_t *)a, vb = *(int64_t *)b;
2582     return va < vb ? -1 : va > vb ? +1 : 0;
2583 }
2584
2585 static int init_output_stream(OutputStream *ost, char *error, int error_len)
2586 {
2587     int ret = 0;
2588
2589     if (ost->encoding_needed) {
2590         AVCodec      *codec = ost->enc;
2591         AVCodecContext *dec = NULL;
2592         InputStream *ist;
2593
2594         if ((ist = get_input_stream(ost)))
2595             dec = ist->dec_ctx;
2596         if (dec && dec->subtitle_header) {
2597             /* ASS code assumes this buffer is null terminated so add extra byte. */
2598             ost->enc_ctx->subtitle_header = av_mallocz(dec->subtitle_header_size + 1);
2599             if (!ost->enc_ctx->subtitle_header)
2600                 return AVERROR(ENOMEM);
2601             memcpy(ost->enc_ctx->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2602             ost->enc_ctx->subtitle_header_size = dec->subtitle_header_size;
2603         }
2604         if (!av_dict_get(ost->encoder_opts, "threads", NULL, 0))
2605             av_dict_set(&ost->encoder_opts, "threads", "auto", 0);
2606         av_dict_set(&ost->encoder_opts, "side_data_only_packets", "1", 0);
2607         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2608             !codec->defaults &&
2609             !av_dict_get(ost->encoder_opts, "b", NULL, 0) &&
2610             !av_dict_get(ost->encoder_opts, "ab", NULL, 0))
2611             av_dict_set(&ost->encoder_opts, "b", "128000", 0);
2612
2613         if ((ret = avcodec_open2(ost->enc_ctx, codec, &ost->encoder_opts)) < 0) {
2614             if (ret == AVERROR_EXPERIMENTAL)
2615                 abort_codec_experimental(codec, 1);
2616             snprintf(error, error_len,
2617                      "Error while opening encoder for output stream #%d:%d - "
2618                      "maybe incorrect parameters such as bit_rate, rate, width or height",
2619                     ost->file_index, ost->index);
2620             return ret;
2621         }
2622         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2623             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
2624             av_buffersink_set_frame_size(ost->filter->filter,
2625                                             ost->enc_ctx->frame_size);
2626         assert_avoptions(ost->encoder_opts);
2627         if (ost->enc_ctx->bit_rate && ost->enc_ctx->bit_rate < 1000)
2628             av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2629                                          " It takes bits/s as argument, not kbits/s\n");
2630
2631         ret = avcodec_copy_context(ost->st->codec, ost->enc_ctx);
2632         if (ret < 0) {
2633             av_log(NULL, AV_LOG_FATAL,
2634                    "Error initializing the output stream codec context.\n");
2635             exit_program(1);
2636         }
2637
2638         // copy timebase while removing common factors
2639         ost->st->time_base = av_add_q(ost->enc_ctx->time_base, (AVRational){0, 1});
2640         ost->st->codec->codec= ost->enc_ctx->codec;
2641     } else {
2642         ret = av_opt_set_dict(ost->enc_ctx, &ost->encoder_opts);
2643         if (ret < 0) {
2644            av_log(NULL, AV_LOG_FATAL,
2645                   "Error setting up codec context options.\n");
2646            return ret;
2647         }
2648         // copy timebase while removing common factors
2649         ost->st->time_base = av_add_q(ost->st->codec->time_base, (AVRational){0, 1});
2650     }
2651
2652     return ret;
2653 }
2654
2655 static void parse_forced_key_frames(char *kf, OutputStream *ost,
2656                                     AVCodecContext *avctx)
2657 {
2658     char *p;
2659     int n = 1, i, size, index = 0;
2660     int64_t t, *pts;
2661
2662     for (p = kf; *p; p++)
2663         if (*p == ',')
2664             n++;
2665     size = n;
2666     pts = av_malloc_array(size, sizeof(*pts));
2667     if (!pts) {
2668         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
2669         exit_program(1);
2670     }
2671
2672     p = kf;
2673     for (i = 0; i < n; i++) {
2674         char *next = strchr(p, ',');
2675
2676         if (next)
2677             *next++ = 0;
2678
2679         if (!memcmp(p, "chapters", 8)) {
2680
2681             AVFormatContext *avf = output_files[ost->file_index]->ctx;
2682             int j;
2683
2684             if (avf->nb_chapters > INT_MAX - size ||
2685                 !(pts = av_realloc_f(pts, size += avf->nb_chapters - 1,
2686                                      sizeof(*pts)))) {
2687                 av_log(NULL, AV_LOG_FATAL,
2688                        "Could not allocate forced key frames array.\n");
2689                 exit_program(1);
2690             }
2691             t = p[8] ? parse_time_or_die("force_key_frames", p + 8, 1) : 0;
2692             t = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2693
2694             for (j = 0; j < avf->nb_chapters; j++) {
2695                 AVChapter *c = avf->chapters[j];
2696                 av_assert1(index < size);
2697                 pts[index++] = av_rescale_q(c->start, c->time_base,
2698                                             avctx->time_base) + t;
2699             }
2700
2701         } else {
2702
2703             t = parse_time_or_die("force_key_frames", p, 1);
2704             av_assert1(index < size);
2705             pts[index++] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2706
2707         }
2708
2709         p = next;
2710     }
2711
2712     av_assert0(index == size);
2713     qsort(pts, size, sizeof(*pts), compare_int64);
2714     ost->forced_kf_count = size;
2715     ost->forced_kf_pts   = pts;
2716 }
2717
2718 static void report_new_stream(int input_index, AVPacket *pkt)
2719 {
2720     InputFile *file = input_files[input_index];
2721     AVStream *st = file->ctx->streams[pkt->stream_index];
2722
2723     if (pkt->stream_index < file->nb_streams_warn)
2724         return;
2725     av_log(file->ctx, AV_LOG_WARNING,
2726            "New %s stream %d:%d at pos:%"PRId64" and DTS:%ss\n",
2727            av_get_media_type_string(st->codec->codec_type),
2728            input_index, pkt->stream_index,
2729            pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
2730     file->nb_streams_warn = pkt->stream_index + 1;
2731 }
2732
2733 static void set_encoder_id(OutputFile *of, OutputStream *ost)
2734 {
2735     AVDictionaryEntry *e;
2736
2737     uint8_t *encoder_string;
2738     int encoder_string_len;
2739     int format_flags = 0;
2740     int codec_flags = 0;
2741
2742     if (av_dict_get(ost->st->metadata, "encoder",  NULL, 0))
2743         return;
2744
2745     e = av_dict_get(of->opts, "fflags", NULL, 0);
2746     if (e) {
2747         const AVOption *o = av_opt_find(of->ctx, "fflags", NULL, 0, 0);
2748         if (!o)
2749             return;
2750         av_opt_eval_flags(of->ctx, o, e->value, &format_flags);
2751     }
2752     e = av_dict_get(ost->encoder_opts, "flags", NULL, 0);
2753     if (e) {
2754         const AVOption *o = av_opt_find(ost->enc_ctx, "flags", NULL, 0, 0);
2755         if (!o)
2756             return;
2757         av_opt_eval_flags(ost->enc_ctx, o, e->value, &codec_flags);
2758     }
2759
2760     encoder_string_len = sizeof(LIBAVCODEC_IDENT) + strlen(ost->enc->name) + 2;
2761     encoder_string     = av_mallocz(encoder_string_len);
2762     if (!encoder_string)
2763         exit_program(1);
2764
2765     if (!(format_flags & AVFMT_FLAG_BITEXACT) && !(codec_flags & AV_CODEC_FLAG_BITEXACT))
2766         av_strlcpy(encoder_string, LIBAVCODEC_IDENT " ", encoder_string_len);
2767     else
2768         av_strlcpy(encoder_string, "Lavc ", encoder_string_len);
2769     av_strlcat(encoder_string, ost->enc->name, encoder_string_len);
2770     av_dict_set(&ost->st->metadata, "encoder",  encoder_string,
2771                 AV_DICT_DONT_STRDUP_VAL | AV_DICT_DONT_OVERWRITE);
2772 }
2773
2774 static int transcode_init(void)
2775 {
2776     int ret = 0, i, j, k;
2777     AVFormatContext *oc;
2778     OutputStream *ost;
2779     InputStream *ist;
2780     char error[1024] = {0};
2781     int want_sdp = 1;
2782
2783     for (i = 0; i < nb_filtergraphs; i++) {
2784         FilterGraph *fg = filtergraphs[i];
2785         for (j = 0; j < fg->nb_outputs; j++) {
2786             OutputFilter *ofilter = fg->outputs[j];
2787             if (!ofilter->ost || ofilter->ost->source_index >= 0)
2788                 continue;
2789             if (fg->nb_inputs != 1)
2790                 continue;
2791             for (k = nb_input_streams-1; k >= 0 ; k--)
2792                 if (fg->inputs[0]->ist == input_streams[k])
2793                     break;
2794             ofilter->ost->source_index = k;
2795         }
2796     }
2797
2798     /* init framerate emulation */
2799     for (i = 0; i < nb_input_files; i++) {
2800         InputFile *ifile = input_files[i];
2801         if (ifile->rate_emu)
2802             for (j = 0; j < ifile->nb_streams; j++)
2803                 input_streams[j + ifile->ist_index]->start = av_gettime_relative();
2804     }
2805
2806     /* for each output stream, we compute the right encoding parameters */
2807     for (i = 0; i < nb_output_streams; i++) {
2808         AVCodecContext *enc_ctx;
2809         AVCodecContext *dec_ctx = NULL;
2810         ost = output_streams[i];
2811         oc  = output_files[ost->file_index]->ctx;
2812         ist = get_input_stream(ost);
2813
2814         if (ost->attachment_filename)
2815             continue;
2816
2817         enc_ctx = ost->stream_copy ? ost->st->codec : ost->enc_ctx;
2818
2819         if (ist) {
2820             dec_ctx = ist->dec_ctx;
2821
2822             ost->st->disposition          = ist->st->disposition;
2823             enc_ctx->bits_per_raw_sample    = dec_ctx->bits_per_raw_sample;
2824             enc_ctx->chroma_sample_location = dec_ctx->chroma_sample_location;
2825         } else {
2826             for (j=0; j<oc->nb_streams; j++) {
2827                 AVStream *st = oc->streams[j];
2828                 if (st != ost->st && st->codec->codec_type == enc_ctx->codec_type)
2829                     break;
2830             }
2831             if (j == oc->nb_streams)
2832                 if (enc_ctx->codec_type == AVMEDIA_TYPE_AUDIO || enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO)
2833                     ost->st->disposition = AV_DISPOSITION_DEFAULT;
2834         }
2835
2836         if (ost->stream_copy) {
2837             AVRational sar;
2838             uint64_t extra_size;
2839
2840             av_assert0(ist && !ost->filter);
2841
2842             extra_size = (uint64_t)dec_ctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE;
2843
2844             if (extra_size > INT_MAX) {
2845                 return AVERROR(EINVAL);
2846             }
2847
2848             /* if stream_copy is selected, no need to decode or encode */
2849             enc_ctx->codec_id   = dec_ctx->codec_id;
2850             enc_ctx->codec_type = dec_ctx->codec_type;
2851
2852             if (!enc_ctx->codec_tag) {
2853                 unsigned int codec_tag;
2854                 if (!oc->oformat->codec_tag ||
2855                      av_codec_get_id (oc->oformat->codec_tag, dec_ctx->codec_tag) == enc_ctx->codec_id ||
2856                      !av_codec_get_tag2(oc->oformat->codec_tag, dec_ctx->codec_id, &codec_tag))
2857                     enc_ctx->codec_tag = dec_ctx->codec_tag;
2858             }
2859
2860             enc_ctx->bit_rate       = dec_ctx->bit_rate;
2861             enc_ctx->rc_max_rate    = dec_ctx->rc_max_rate;
2862             enc_ctx->rc_buffer_size = dec_ctx->rc_buffer_size;
2863             enc_ctx->field_order    = dec_ctx->field_order;
2864             if (dec_ctx->extradata_size) {
2865                 enc_ctx->extradata      = av_mallocz(extra_size);
2866                 if (!enc_ctx->extradata) {
2867                     return AVERROR(ENOMEM);
2868                 }
2869                 memcpy(enc_ctx->extradata, dec_ctx->extradata, dec_ctx->extradata_size);
2870             }
2871             enc_ctx->extradata_size= dec_ctx->extradata_size;
2872             enc_ctx->bits_per_coded_sample  = dec_ctx->bits_per_coded_sample;
2873
2874             enc_ctx->time_base = ist->st->time_base;
2875             /*
2876              * Avi is a special case here because it supports variable fps but
2877              * having the fps and timebase differe significantly adds quite some
2878              * overhead
2879              */
2880             if(!strcmp(oc->oformat->name, "avi")) {
2881                 if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
2882                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
2883                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(dec_ctx->time_base)
2884                                && av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(dec_ctx->time_base) < 1.0/500
2885                      || copy_tb==2){
2886                     enc_ctx->time_base.num = ist->st->r_frame_rate.den;
2887                     enc_ctx->time_base.den = 2*ist->st->r_frame_rate.num;
2888                     enc_ctx->ticks_per_frame = 2;
2889                 } else if (   copy_tb<0 && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2890                                  && av_q2d(ist->st->time_base) < 1.0/500
2891                     || copy_tb==0){
2892                     enc_ctx->time_base = dec_ctx->time_base;
2893                     enc_ctx->time_base.num *= dec_ctx->ticks_per_frame;
2894                     enc_ctx->time_base.den *= 2;
2895                     enc_ctx->ticks_per_frame = 2;
2896                 }
2897             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2898                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2899                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2900                       && strcmp(oc->oformat->name, "f4v")
2901             ) {
2902                 if(   copy_tb<0 && dec_ctx->time_base.den
2903                                 && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > av_q2d(ist->st->time_base)
2904                                 && av_q2d(ist->st->time_base) < 1.0/500
2905                    || copy_tb==0){
2906                     enc_ctx->time_base = dec_ctx->time_base;
2907                     enc_ctx->time_base.num *= dec_ctx->ticks_per_frame;
2908                 }
2909             }
2910             if (   enc_ctx->codec_tag == AV_RL32("tmcd")
2911                 && dec_ctx->time_base.num < dec_ctx->time_base.den
2912                 && dec_ctx->time_base.num > 0
2913                 && 121LL*dec_ctx->time_base.num > dec_ctx->time_base.den) {
2914                 enc_ctx->time_base = dec_ctx->time_base;
2915             }
2916
2917             if (ist && !ost->frame_rate.num)
2918                 ost->frame_rate = ist->framerate;
2919             if(ost->frame_rate.num)
2920                 enc_ctx->time_base = av_inv_q(ost->frame_rate);
2921
2922             av_reduce(&enc_ctx->time_base.num, &enc_ctx->time_base.den,
2923                         enc_ctx->time_base.num, enc_ctx->time_base.den, INT_MAX);
2924
2925             if (ist->st->nb_side_data) {
2926                 ost->st->side_data = av_realloc_array(NULL, ist->st->nb_side_data,
2927                                                       sizeof(*ist->st->side_data));
2928                 if (!ost->st->side_data)
2929                     return AVERROR(ENOMEM);
2930
2931                 ost->st->nb_side_data = 0;
2932                 for (j = 0; j < ist->st->nb_side_data; j++) {
2933                     const AVPacketSideData *sd_src = &ist->st->side_data[j];
2934                     AVPacketSideData *sd_dst = &ost->st->side_data[ost->st->nb_side_data];
2935
2936                     if (ost->rotate_overridden && sd_src->type == AV_PKT_DATA_DISPLAYMATRIX)
2937                         continue;
2938
2939                     sd_dst->data = av_malloc(sd_src->size);
2940                     if (!sd_dst->data)
2941                         return AVERROR(ENOMEM);
2942                     memcpy(sd_dst->data, sd_src->data, sd_src->size);
2943                     sd_dst->size = sd_src->size;
2944                     sd_dst->type = sd_src->type;
2945                     ost->st->nb_side_data++;
2946                 }
2947             }
2948
2949             ost->parser = av_parser_init(enc_ctx->codec_id);
2950
2951             switch (enc_ctx->codec_type) {
2952             case AVMEDIA_TYPE_AUDIO:
2953                 if (audio_volume != 256) {
2954                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2955                     exit_program(1);
2956                 }
2957                 enc_ctx->channel_layout     = dec_ctx->channel_layout;
2958                 enc_ctx->sample_rate        = dec_ctx->sample_rate;
2959                 enc_ctx->channels           = dec_ctx->channels;
2960                 enc_ctx->frame_size         = dec_ctx->frame_size;
2961                 enc_ctx->audio_service_type = dec_ctx->audio_service_type;
2962                 enc_ctx->block_align        = dec_ctx->block_align;
2963                 enc_ctx->initial_padding    = dec_ctx->delay;
2964 #if FF_API_AUDIOENC_DELAY
2965                 enc_ctx->delay              = dec_ctx->delay;
2966 #endif
2967                 if((enc_ctx->block_align == 1 || enc_ctx->block_align == 1152 || enc_ctx->block_align == 576) && enc_ctx->codec_id == AV_CODEC_ID_MP3)
2968                     enc_ctx->block_align= 0;
2969                 if(enc_ctx->codec_id == AV_CODEC_ID_AC3)
2970                     enc_ctx->block_align= 0;
2971                 break;
2972             case AVMEDIA_TYPE_VIDEO:
2973                 enc_ctx->pix_fmt            = dec_ctx->pix_fmt;
2974                 enc_ctx->width              = dec_ctx->width;
2975                 enc_ctx->height             = dec_ctx->height;
2976                 enc_ctx->has_b_frames       = dec_ctx->has_b_frames;
2977                 if (ost->frame_aspect_ratio.num) { // overridden by the -aspect cli option
2978                     sar =
2979                         av_mul_q(ost->frame_aspect_ratio,
2980                                  (AVRational){ enc_ctx->height, enc_ctx->width });
2981                     av_log(NULL, AV_LOG_WARNING, "Overriding aspect ratio "
2982                            "with stream copy may produce invalid files\n");
2983                 }
2984                 else if (ist->st->sample_aspect_ratio.num)
2985                     sar = ist->st->sample_aspect_ratio;
2986                 else
2987                     sar = dec_ctx->sample_aspect_ratio;
2988                 ost->st->sample_aspect_ratio = enc_ctx->sample_aspect_ratio = sar;
2989                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2990                 ost->st->r_frame_rate = ist->st->r_frame_rate;
2991                 break;
2992             case AVMEDIA_TYPE_SUBTITLE:
2993                 enc_ctx->width  = dec_ctx->width;
2994                 enc_ctx->height = dec_ctx->height;
2995                 break;
2996             case AVMEDIA_TYPE_UNKNOWN:
2997             case AVMEDIA_TYPE_DATA:
2998             case AVMEDIA_TYPE_ATTACHMENT:
2999                 break;
3000             default:
3001                 abort();
3002             }
3003         } else {
3004             if (!ost->enc)
3005                 ost->enc = avcodec_find_encoder(enc_ctx->codec_id);
3006             if (!ost->enc) {
3007                 /* should only happen when a default codec is not present. */
3008                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
3009                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
3010                 ret = AVERROR(EINVAL);
3011                 goto dump_format;
3012             }
3013
3014             set_encoder_id(output_files[ost->file_index], ost);
3015
3016             if (!ost->filter &&
3017                 (enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO ||
3018                  enc_ctx->codec_type == AVMEDIA_TYPE_AUDIO)) {
3019                     FilterGraph *fg;
3020                     fg = init_simple_filtergraph(ist, ost);
3021                     if (configure_filtergraph(fg)) {
3022                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
3023                         exit_program(1);
3024                     }
3025             }
3026
3027             if (enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
3028                 if (!ost->frame_rate.num)
3029                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
3030                 if (ist && !ost->frame_rate.num)
3031                     ost->frame_rate = ist->framerate;
3032                 if (ist && !ost->frame_rate.num)
3033                     ost->frame_rate = ist->st->r_frame_rate;
3034                 if (ist && !ost->frame_rate.num) {
3035                     ost->frame_rate = (AVRational){25, 1};
3036                     av_log(NULL, AV_LOG_WARNING,
3037                            "No information "
3038                            "about the input framerate is available. Falling "
3039                            "back to a default value of 25fps for output stream #%d:%d. Use the -r option "
3040                            "if you want a different framerate.\n",
3041                            ost->file_index, ost->index);
3042                 }
3043 //                    ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
3044                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
3045                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
3046                     ost->frame_rate = ost->enc->supported_framerates[idx];
3047                 }
3048                 // reduce frame rate for mpeg4 to be within the spec limits
3049                 if (enc_ctx->codec_id == AV_CODEC_ID_MPEG4) {
3050                     av_reduce(&ost->frame_rate.num, &ost->frame_rate.den,
3051                               ost->frame_rate.num, ost->frame_rate.den, 65535);
3052                 }
3053             }
3054
3055             switch (enc_ctx->codec_type) {
3056             case AVMEDIA_TYPE_AUDIO:
3057                 enc_ctx->sample_fmt     = ost->filter->filter->inputs[0]->format;
3058                 enc_ctx->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
3059                 enc_ctx->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
3060                 enc_ctx->channels       = avfilter_link_get_channels(ost->filter->filter->inputs[0]);
3061                 enc_ctx->time_base      = (AVRational){ 1, enc_ctx->sample_rate };
3062                 break;
3063             case AVMEDIA_TYPE_VIDEO:
3064                 enc_ctx->time_base = av_inv_q(ost->frame_rate);
3065                 if (!(enc_ctx->time_base.num && enc_ctx->time_base.den))
3066                     enc_ctx->time_base = ost->filter->filter->inputs[0]->time_base;
3067                 if (   av_q2d(enc_ctx->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
3068                    && (video_sync_method == VSYNC_CFR || video_sync_method == VSYNC_VSCFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
3069                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
3070                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
3071                 }
3072                 for (j = 0; j < ost->forced_kf_count; j++)
3073                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
3074                                                          AV_TIME_BASE_Q,
3075                                                          enc_ctx->time_base);
3076
3077                 enc_ctx->width  = ost->filter->filter->inputs[0]->w;
3078                 enc_ctx->height = ost->filter->filter->inputs[0]->h;
3079                 enc_ctx->sample_aspect_ratio = ost->st->sample_aspect_ratio =
3080                     ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option
3081                     av_mul_q(ost->frame_aspect_ratio, (AVRational){ enc_ctx->height, enc_ctx->width }) :
3082                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
3083                 if (!strncmp(ost->enc->name, "libx264", 7) &&
3084                     enc_ctx->pix_fmt == AV_PIX_FMT_NONE &&
3085                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
3086                     av_log(NULL, AV_LOG_WARNING,
3087                            "No pixel format specified, %s for H.264 encoding chosen.\n"
3088                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
3089                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
3090                 if (!strncmp(ost->enc->name, "mpeg2video", 10) &&
3091                     enc_ctx->pix_fmt == AV_PIX_FMT_NONE &&
3092                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
3093                     av_log(NULL, AV_LOG_WARNING,
3094                            "No pixel format specified, %s for MPEG-2 encoding chosen.\n"
3095                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
3096                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
3097                 enc_ctx->pix_fmt = ost->filter->filter->inputs[0]->format;
3098
3099                 ost->st->avg_frame_rate = ost->frame_rate;
3100
3101                 if (!dec_ctx ||
3102                     enc_ctx->width   != dec_ctx->width  ||
3103                     enc_ctx->height  != dec_ctx->height ||
3104                     enc_ctx->pix_fmt != dec_ctx->pix_fmt) {
3105                     enc_ctx->bits_per_raw_sample = frame_bits_per_raw_sample;
3106                 }
3107
3108                 if (ost->forced_keyframes) {
3109                     if (!strncmp(ost->forced_keyframes, "expr:", 5)) {
3110                         ret = av_expr_parse(&ost->forced_keyframes_pexpr, ost->forced_keyframes+5,
3111                                             forced_keyframes_const_names, NULL, NULL, NULL, NULL, 0, NULL);
3112                         if (ret < 0) {
3113                             av_log(NULL, AV_LOG_ERROR,
3114                                    "Invalid force_key_frames expression '%s'\n", ost->forced_keyframes+5);
3115                             return ret;
3116                         }
3117                         ost->forced_keyframes_expr_const_values[FKF_N] = 0;
3118                         ost->forced_keyframes_expr_const_values[FKF_N_FORCED] = 0;
3119                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] = NAN;
3120                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] = NAN;
3121
3122                         // Don't parse the 'forced_keyframes' in case of 'keep-source-keyframes',
3123                         // parse it only for static kf timings
3124                     } else if(strncmp(ost->forced_keyframes, "source", 6)) {
3125                         parse_forced_key_frames(ost->forced_keyframes, ost, ost->enc_ctx);
3126                     }
3127                 }
3128                 break;
3129             case AVMEDIA_TYPE_SUBTITLE:
3130                 enc_ctx->time_base = (AVRational){1, 1000};
3131                 if (!enc_ctx->width) {
3132                     enc_ctx->width     = input_streams[ost->source_index]->st->codec->width;
3133                     enc_ctx->height    = input_streams[ost->source_index]->st->codec->height;
3134                 }
3135                 break;
3136             case AVMEDIA_TYPE_DATA:
3137                 break;
3138             default:
3139                 abort();
3140                 break;
3141             }
3142         }
3143
3144         if (ost->disposition) {
3145             static const AVOption opts[] = {
3146                 { "disposition"         , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
3147                 { "default"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DEFAULT           },    .unit = "flags" },
3148                 { "dub"                 , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DUB               },    .unit = "flags" },
3149                 { "original"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_ORIGINAL          },    .unit = "flags" },
3150                 { "comment"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_COMMENT           },    .unit = "flags" },
3151                 { "lyrics"              , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_LYRICS            },    .unit = "flags" },
3152                 { "karaoke"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_KARAOKE           },    .unit = "flags" },
3153                 { "forced"              , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_FORCED            },    .unit = "flags" },
3154                 { "hearing_impaired"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_HEARING_IMPAIRED  },    .unit = "flags" },
3155                 { "visual_impaired"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_VISUAL_IMPAIRED   },    .unit = "flags" },
3156                 { "clean_effects"       , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CLEAN_EFFECTS     },    .unit = "flags" },
3157                 { "captions"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CAPTIONS          },    .unit = "flags" },
3158                 { "descriptions"        , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DESCRIPTIONS      },    .unit = "flags" },
3159                 { "metadata"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_METADATA          },    .unit = "flags" },
3160                 { NULL },
3161             };
3162             static const AVClass class = {
3163                 .class_name = "",
3164                 .item_name  = av_default_item_name,
3165                 .option     = opts,
3166                 .version    = LIBAVUTIL_VERSION_INT,
3167             };
3168             const AVClass *pclass = &class;
3169
3170             ret = av_opt_eval_flags(&pclass, &opts[0], ost->disposition, &ost->st->disposition);
3171             if (ret < 0)
3172                 goto dump_format;
3173         }
3174     }
3175
3176     /* open each encoder */
3177     for (i = 0; i < nb_output_streams; i++) {
3178         ret = init_output_stream(output_streams[i], error, sizeof(error));
3179         if (ret < 0)
3180             goto dump_format;
3181     }
3182
3183     /* init input streams */
3184     for (i = 0; i < nb_input_streams; i++)
3185         if ((ret = init_input_stream(i, error, sizeof(error))) < 0) {
3186             for (i = 0; i < nb_output_streams; i++) {
3187                 ost = output_streams[i];
3188                 avcodec_close(ost->enc_ctx);
3189             }
3190             goto dump_format;
3191         }
3192
3193     /* discard unused programs */
3194     for (i = 0; i < nb_input_files; i++) {
3195         InputFile *ifile = input_files[i];
3196         for (j = 0; j < ifile->ctx->nb_programs; j++) {
3197             AVProgram *p = ifile->ctx->programs[j];
3198             int discard  = AVDISCARD_ALL;
3199
3200             for (k = 0; k < p->nb_stream_indexes; k++)
3201                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
3202                     discard = AVDISCARD_DEFAULT;
3203                     break;
3204                 }
3205             p->discard = discard;
3206         }
3207     }
3208
3209     /* open files and write file headers */
3210     for (i = 0; i < nb_output_files; i++) {
3211         oc = output_files[i]->ctx;
3212         oc->interrupt_callback = int_cb;
3213         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
3214             snprintf(error, sizeof(error),
3215                      "Could not write header for output file #%d "
3216                      "(incorrect codec parameters ?): %s",
3217                      i, av_err2str(ret));
3218             ret = AVERROR(EINVAL);
3219             goto dump_format;
3220         }
3221 //         assert_avoptions(output_files[i]->opts);
3222         if (strcmp(oc->oformat->name, "rtp")) {
3223             want_sdp = 0;
3224         }
3225     }
3226
3227  dump_format:
3228     /* dump the file output parameters - cannot be done before in case
3229        of stream copy */
3230     for (i = 0; i < nb_output_files; i++) {
3231         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
3232     }
3233
3234     /* dump the stream mapping */
3235     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
3236     for (i = 0; i < nb_input_streams; i++) {
3237         ist = input_streams[i];
3238
3239         for (j = 0; j < ist->nb_filters; j++) {
3240             if (ist->filters[j]->graph->graph_desc) {
3241                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
3242                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
3243                        ist->filters[j]->name);
3244                 if (nb_filtergraphs > 1)
3245                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
3246                 av_log(NULL, AV_LOG_INFO, "\n");
3247             }
3248         }
3249     }
3250
3251     for (i = 0; i < nb_output_streams; i++) {
3252         ost = output_streams[i];
3253
3254         if (ost->attachment_filename) {
3255             /* an attached file */
3256             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
3257                    ost->attachment_filename, ost->file_index, ost->index);
3258             continue;
3259         }
3260
3261         if (ost->filter && ost->filter->graph->graph_desc) {
3262             /* output from a complex graph */
3263             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
3264             if (nb_filtergraphs > 1)
3265                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
3266
3267             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
3268                    ost->index, ost->enc ? ost->enc->name : "?");
3269             continue;
3270         }
3271
3272         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
3273                input_streams[ost->source_index]->file_index,
3274                input_streams[ost->source_index]->st->index,
3275                ost->file_index,
3276                ost->index);
3277         if (ost->sync_ist != input_streams[ost->source_index])
3278             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
3279                    ost->sync_ist->file_index,
3280                    ost->sync_ist->st->index);
3281         if (ost->stream_copy)
3282             av_log(NULL, AV_LOG_INFO, " (copy)");
3283         else {
3284             const AVCodec *in_codec    = input_streams[ost->source_index]->dec;
3285             const AVCodec *out_codec   = ost->enc;
3286             const char *decoder_name   = "?";
3287             const char *in_codec_name  = "?";
3288             const char *encoder_name   = "?";
3289             const char *out_codec_name = "?";
3290             const AVCodecDescriptor *desc;
3291
3292             if (in_codec) {
3293                 decoder_name  = in_codec->name;
3294                 desc = avcodec_descriptor_get(in_codec->id);
3295                 if (desc)
3296                     in_codec_name = desc->name;
3297                 if (!strcmp(decoder_name, in_codec_name))
3298                     decoder_name = "native";
3299             }
3300
3301             if (out_codec) {
3302                 encoder_name   = out_codec->name;
3303                 desc = avcodec_descriptor_get(out_codec->id);
3304                 if (desc)
3305                     out_codec_name = desc->name;
3306                 if (!strcmp(encoder_name, out_codec_name))
3307                     encoder_name = "native";
3308             }
3309
3310             av_log(NULL, AV_LOG_INFO, " (%s (%s) -> %s (%s))",
3311                    in_codec_name, decoder_name,
3312                    out_codec_name, encoder_name);
3313         }
3314         av_log(NULL, AV_LOG_INFO, "\n");
3315     }
3316
3317     if (ret) {
3318         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
3319         return ret;
3320     }
3321
3322     if (sdp_filename || want_sdp) {
3323         print_sdp();
3324     }
3325
3326     transcode_init_done = 1;
3327
3328     return 0;
3329 }
3330
3331 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
3332 static int need_output(void)
3333 {
3334     int i;
3335
3336     for (i = 0; i < nb_output_streams; i++) {
3337         OutputStream *ost    = output_streams[i];
3338         OutputFile *of       = output_files[ost->file_index];
3339         AVFormatContext *os  = output_files[ost->file_index]->ctx;
3340
3341         if (ost->finished ||
3342             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3343             continue;
3344         if (ost->frame_number >= ost->max_frames) {
3345             int j;
3346             for (j = 0; j < of->ctx->nb_streams; j++)
3347                 close_output_stream(output_streams[of->ost_index + j]);
3348             continue;
3349         }
3350
3351         return 1;
3352     }
3353
3354     return 0;
3355 }
3356
3357 /**
3358  * Select the output stream to process.
3359  *
3360  * @return  selected output stream, or NULL if none available
3361  */
3362 static OutputStream *choose_output(void)
3363 {
3364     int i;
3365     int64_t opts_min = INT64_MAX;
3366     OutputStream *ost_min = NULL;
3367
3368     for (i = 0; i < nb_output_streams; i++) {
3369         OutputStream *ost = output_streams[i];
3370         int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
3371                                     AV_TIME_BASE_Q);
3372         if (!ost->finished && opts < opts_min) {
3373             opts_min = opts;
3374             ost_min  = ost->unavailable ? NULL : ost;
3375         }
3376     }
3377     return ost_min;
3378 }
3379
3380 static int check_keyboard_interaction(int64_t cur_time)
3381 {
3382     int i, ret, key;
3383     static int64_t last_time;
3384     if (received_nb_signals)
3385         return AVERROR_EXIT;
3386     /* read_key() returns 0 on EOF */
3387     if(cur_time - last_time >= 100000 && !run_as_daemon){
3388         key =  read_key();
3389         last_time = cur_time;
3390     }else
3391         key = -1;
3392     if (key == 'q')
3393         return AVERROR_EXIT;
3394     if (key == '+') av_log_set_level(av_log_get_level()+10);
3395     if (key == '-') av_log_set_level(av_log_get_level()-10);
3396     if (key == 's') qp_hist     ^= 1;
3397     if (key == 'h'){
3398         if (do_hex_dump){
3399             do_hex_dump = do_pkt_dump = 0;
3400         } else if(do_pkt_dump){
3401             do_hex_dump = 1;
3402         } else
3403             do_pkt_dump = 1;
3404         av_log_set_level(AV_LOG_DEBUG);
3405     }
3406     if (key == 'c' || key == 'C'){
3407         char buf[4096], target[64], command[256], arg[256] = {0};
3408         double time;
3409         int k, n = 0;
3410         fprintf(stderr, "\nEnter command: <target>|all <time>|-1 <command>[ <argument>]\n");
3411         i = 0;
3412         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3413             if (k > 0)
3414                 buf[i++] = k;
3415         buf[i] = 0;
3416         if (k > 0 &&
3417             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
3418             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
3419                    target, time, command, arg);
3420             for (i = 0; i < nb_filtergraphs; i++) {
3421                 FilterGraph *fg = filtergraphs[i];
3422                 if (fg->graph) {
3423                     if (time < 0) {
3424                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
3425                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
3426                         fprintf(stderr, "Command reply for stream %d: ret:%d res:\n%s", i, ret, buf);
3427                     } else if (key == 'c') {
3428                         fprintf(stderr, "Queing commands only on filters supporting the specific command is unsupported\n");
3429                         ret = AVERROR_PATCHWELCOME;
3430                     } else {
3431                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
3432                         if (ret < 0)
3433                             fprintf(stderr, "Queing command failed with error %s\n", av_err2str(ret));
3434                     }
3435                 }
3436             }
3437         } else {
3438             av_log(NULL, AV_LOG_ERROR,
3439                    "Parse error, at least 3 arguments were expected, "
3440                    "only %d given in string '%s'\n", n, buf);
3441         }
3442     }
3443     if (key == 'd' || key == 'D'){
3444         int debug=0;
3445         if(key == 'D') {
3446             debug = input_streams[0]->st->codec->debug<<1;
3447             if(!debug) debug = 1;
3448             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
3449                 debug += debug;
3450         }else{
3451             char buf[32];
3452             int k = 0;
3453             i = 0;
3454             while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3455                 if (k > 0)
3456                     buf[i++] = k;
3457             buf[i] = 0;
3458             if (k <= 0 || sscanf(buf, "%d", &debug)!=1)
3459                 fprintf(stderr,"error parsing debug value\n");
3460         }
3461         for(i=0;i<nb_input_streams;i++) {
3462             input_streams[i]->st->codec->debug = debug;
3463         }
3464         for(i=0;i<nb_output_streams;i++) {
3465             OutputStream *ost = output_streams[i];
3466             ost->enc_ctx->debug = debug;
3467         }
3468         if(debug) av_log_set_level(AV_LOG_DEBUG);
3469         fprintf(stderr,"debug=%d\n", debug);
3470     }
3471     if (key == '?'){
3472         fprintf(stderr, "key    function\n"
3473                         "?      show this help\n"
3474                         "+      increase verbosity\n"
3475                         "-      decrease verbosity\n"
3476                         "c      Send command to first matching filter supporting it\n"
3477                         "C      Send/Que command to all matching filters\n"
3478                         "D      cycle through available debug modes\n"
3479                         "h      dump packets/hex press to cycle through the 3 states\n"
3480                         "q      quit\n"
3481                         "s      Show QP histogram\n"
3482         );
3483     }
3484     return 0;
3485 }
3486
3487 #if HAVE_PTHREADS
3488 static void *input_thread(void *arg)
3489 {
3490     InputFile *f = arg;
3491     unsigned flags = f->non_blocking ? AV_THREAD_MESSAGE_NONBLOCK : 0;
3492     int ret = 0;
3493
3494     while (1) {
3495         AVPacket pkt;
3496         ret = av_read_frame(f->ctx, &pkt);
3497
3498         if (ret == AVERROR(EAGAIN)) {
3499             av_usleep(10000);
3500             continue;
3501         }
3502         if (ret < 0) {
3503             av_thread_message_queue_set_err_recv(f->in_thread_queue, ret);
3504             break;
3505         }
3506         av_dup_packet(&pkt);
3507         ret = av_thread_message_queue_send(f->in_thread_queue, &pkt, flags);
3508         if (flags && ret == AVERROR(EAGAIN)) {
3509             flags = 0;
3510             ret = av_thread_message_queue_send(f->in_thread_queue, &pkt, flags);
3511             av_log(f->ctx, AV_LOG_WARNING,
3512                    "Thread message queue blocking; consider raising the "
3513                    "thread_queue_size option (current value: %d)\n",
3514                    f->thread_queue_size);
3515         }
3516         if (ret < 0) {
3517             if (ret != AVERROR_EOF)
3518                 av_log(f->ctx, AV_LOG_ERROR,
3519                        "Unable to send packet to main thread: %s\n",
3520                        av_err2str(ret));
3521             av_free_packet(&pkt);
3522             av_thread_message_queue_set_err_recv(f->in_thread_queue, ret);
3523             break;
3524         }
3525     }
3526
3527     return NULL;
3528 }
3529
3530 static void free_input_threads(void)
3531 {
3532     int i;
3533
3534     for (i = 0; i < nb_input_files; i++) {
3535         InputFile *f = input_files[i];
3536         AVPacket pkt;
3537
3538         if (!f || !f->in_thread_queue)
3539             continue;
3540         av_thread_message_queue_set_err_send(f->in_thread_queue, AVERROR_EOF);
3541         while (av_thread_message_queue_recv(f->in_thread_queue, &pkt, 0) >= 0)
3542             av_free_packet(&pkt);
3543
3544         pthread_join(f->thread, NULL);
3545         f->joined = 1;
3546         av_thread_message_queue_free(&f->in_thread_queue);
3547     }
3548 }
3549
3550 static int init_input_threads(void)
3551 {
3552     int i, ret;
3553
3554     if (nb_input_files == 1)
3555         return 0;
3556
3557     for (i = 0; i < nb_input_files; i++) {
3558         InputFile *f = input_files[i];
3559
3560         if (f->ctx->pb ? !f->ctx->pb->seekable :
3561             strcmp(f->ctx->iformat->name, "lavfi"))
3562             f->non_blocking = 1;
3563         ret = av_thread_message_queue_alloc(&f->in_thread_queue,
3564                                             f->thread_queue_size, sizeof(AVPacket));
3565         if (ret < 0)
3566             return ret;
3567
3568         if ((ret = pthread_create(&f->thread, NULL, input_thread, f))) {
3569             av_log(NULL, AV_LOG_ERROR, "pthread_create failed: %s. Try to increase `ulimit -v` or decrease `ulimit -s`.\n", strerror(ret));
3570             av_thread_message_queue_free(&f->in_thread_queue);
3571             return AVERROR(ret);
3572         }
3573     }
3574     return 0;
3575 }
3576
3577 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
3578 {
3579     return av_thread_message_queue_recv(f->in_thread_queue, pkt,
3580                                         f->non_blocking ?
3581                                         AV_THREAD_MESSAGE_NONBLOCK : 0);
3582 }
3583 #endif
3584
3585 static int get_input_packet(InputFile *f, AVPacket *pkt)
3586 {
3587     if (f->rate_emu) {
3588         int i;
3589         for (i = 0; i < f->nb_streams; i++) {
3590             InputStream *ist = input_streams[f->ist_index + i];
3591             int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
3592             int64_t now = av_gettime_relative() - ist->start;
3593             if (pts > now)
3594                 return AVERROR(EAGAIN);
3595         }
3596     }
3597
3598 #if HAVE_PTHREADS
3599     if (nb_input_files > 1)
3600         return get_input_packet_mt(f, pkt);
3601 #endif
3602     return av_read_frame(f->ctx, pkt);
3603 }
3604
3605 static int got_eagain(void)
3606 {
3607     int i;
3608     for (i = 0; i < nb_output_streams; i++)
3609         if (output_streams[i]->unavailable)
3610             return 1;
3611     return 0;
3612 }
3613
3614 static void reset_eagain(void)
3615 {
3616     int i;
3617     for (i = 0; i < nb_input_files; i++)
3618         input_files[i]->eagain = 0;
3619     for (i = 0; i < nb_output_streams; i++)