d9b8c0bffffb27213ce7e0bdfc56be55d916962a
[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/avfilter.h"
68 # include "libavfilter/buffersrc.h"
69 # include "libavfilter/buffersink.h"
70
71 #if HAVE_SYS_RESOURCE_H
72 #include <sys/time.h>
73 #include <sys/types.h>
74 #include <sys/resource.h>
75 #elif HAVE_GETPROCESSTIMES
76 #include <windows.h>
77 #endif
78 #if HAVE_GETPROCESSMEMORYINFO
79 #include <windows.h>
80 #include <psapi.h>
81 #endif
82 #if HAVE_SETCONSOLECTRLHANDLER
83 #include <windows.h>
84 #endif
85
86
87 #if HAVE_SYS_SELECT_H
88 #include <sys/select.h>
89 #endif
90
91 #if HAVE_TERMIOS_H
92 #include <fcntl.h>
93 #include <sys/ioctl.h>
94 #include <sys/time.h>
95 #include <termios.h>
96 #elif HAVE_KBHIT
97 #include <conio.h>
98 #endif
99
100 #if HAVE_PTHREADS
101 #include <pthread.h>
102 #endif
103
104 #include <time.h>
105
106 #include "ffmpeg.h"
107 #include "cmdutils.h"
108
109 #include "libavutil/avassert.h"
110
111 const char program_name[] = "ffmpeg";
112 const int program_birth_year = 2000;
113
114 static FILE *vstats_file;
115
116 const char *const forced_keyframes_const_names[] = {
117     "n",
118     "n_forced",
119     "prev_forced_n",
120     "prev_forced_t",
121     "t",
122     NULL
123 };
124
125 static void do_video_stats(OutputStream *ost, int frame_size);
126 static int64_t getutime(void);
127 static int64_t getmaxrss(void);
128
129 static int run_as_daemon  = 0;
130 static int nb_frames_dup = 0;
131 static int nb_frames_drop = 0;
132 static int64_t decode_error_stat[2];
133
134 static int current_time;
135 AVIOContext *progress_avio = NULL;
136
137 static uint8_t *subtitle_out;
138
139 InputStream **input_streams = NULL;
140 int        nb_input_streams = 0;
141 InputFile   **input_files   = NULL;
142 int        nb_input_files   = 0;
143
144 OutputStream **output_streams = NULL;
145 int         nb_output_streams = 0;
146 OutputFile   **output_files   = NULL;
147 int         nb_output_files   = 0;
148
149 FilterGraph **filtergraphs;
150 int        nb_filtergraphs;
151
152 #if HAVE_TERMIOS_H
153
154 /* init terminal so that we can grab keys */
155 static struct termios oldtty;
156 static int restore_tty;
157 #endif
158
159 #if HAVE_PTHREADS
160 static void free_input_threads(void);
161 #endif
162
163 /* sub2video hack:
164    Convert subtitles to video with alpha to insert them in filter graphs.
165    This is a temporary solution until libavfilter gets real subtitles support.
166  */
167
168 static int sub2video_get_blank_frame(InputStream *ist)
169 {
170     int ret;
171     AVFrame *frame = ist->sub2video.frame;
172
173     av_frame_unref(frame);
174     ist->sub2video.frame->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
175     ist->sub2video.frame->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
176     ist->sub2video.frame->format = AV_PIX_FMT_RGB32;
177     if ((ret = av_frame_get_buffer(frame, 32)) < 0)
178         return ret;
179     memset(frame->data[0], 0, frame->height * frame->linesize[0]);
180     return 0;
181 }
182
183 static void sub2video_copy_rect(uint8_t *dst, int dst_linesize, int w, int h,
184                                 AVSubtitleRect *r)
185 {
186     uint32_t *pal, *dst2;
187     uint8_t *src, *src2;
188     int x, y;
189
190     if (r->type != SUBTITLE_BITMAP) {
191         av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n");
192         return;
193     }
194     if (r->x < 0 || r->x + r->w > w || r->y < 0 || r->y + r->h > h) {
195         av_log(NULL, AV_LOG_WARNING, "sub2video: rectangle (%d %d %d %d) overflowing %d %d\n",
196             r->x, r->y, r->w, r->h, w, h
197         );
198         return;
199     }
200
201     dst += r->y * dst_linesize + r->x * 4;
202     src = r->pict.data[0];
203     pal = (uint32_t *)r->pict.data[1];
204     for (y = 0; y < r->h; y++) {
205         dst2 = (uint32_t *)dst;
206         src2 = src;
207         for (x = 0; x < r->w; x++)
208             *(dst2++) = pal[*(src2++)];
209         dst += dst_linesize;
210         src += r->pict.linesize[0];
211     }
212 }
213
214 static void sub2video_push_ref(InputStream *ist, int64_t pts)
215 {
216     AVFrame *frame = ist->sub2video.frame;
217     int i;
218
219     av_assert1(frame->data[0]);
220     ist->sub2video.last_pts = frame->pts = pts;
221     for (i = 0; i < ist->nb_filters; i++)
222         av_buffersrc_add_frame_flags(ist->filters[i]->filter, frame,
223                                      AV_BUFFERSRC_FLAG_KEEP_REF |
224                                      AV_BUFFERSRC_FLAG_PUSH);
225 }
226
227 static void sub2video_update(InputStream *ist, AVSubtitle *sub)
228 {
229     AVFrame *frame = ist->sub2video.frame;
230     int8_t *dst;
231     int     dst_linesize;
232     int num_rects, i;
233     int64_t pts, end_pts;
234
235     if (!frame)
236         return;
237     if (sub) {
238         pts       = av_rescale_q(sub->pts + sub->start_display_time * 1000LL,
239                                  AV_TIME_BASE_Q, ist->st->time_base);
240         end_pts   = av_rescale_q(sub->pts + sub->end_display_time   * 1000LL,
241                                  AV_TIME_BASE_Q, ist->st->time_base);
242         num_rects = sub->num_rects;
243     } else {
244         pts       = ist->sub2video.end_pts;
245         end_pts   = INT64_MAX;
246         num_rects = 0;
247     }
248     if (sub2video_get_blank_frame(ist) < 0) {
249         av_log(ist->dec_ctx, AV_LOG_ERROR,
250                "Impossible to get a blank canvas.\n");
251         return;
252     }
253     dst          = frame->data    [0];
254     dst_linesize = frame->linesize[0];
255     for (i = 0; i < num_rects; i++)
256         sub2video_copy_rect(dst, dst_linesize, frame->width, frame->height, sub->rects[i]);
257     sub2video_push_ref(ist, pts);
258     ist->sub2video.end_pts = end_pts;
259 }
260
261 static void sub2video_heartbeat(InputStream *ist, int64_t pts)
262 {
263     InputFile *infile = input_files[ist->file_index];
264     int i, j, nb_reqs;
265     int64_t pts2;
266
267     /* When a frame is read from a file, examine all sub2video streams in
268        the same file and send the sub2video frame again. Otherwise, decoded
269        video frames could be accumulating in the filter graph while a filter
270        (possibly overlay) is desperately waiting for a subtitle frame. */
271     for (i = 0; i < infile->nb_streams; i++) {
272         InputStream *ist2 = input_streams[infile->ist_index + i];
273         if (!ist2->sub2video.frame)
274             continue;
275         /* subtitles seem to be usually muxed ahead of other streams;
276            if not, subtracting a larger time here is necessary */
277         pts2 = av_rescale_q(pts, ist->st->time_base, ist2->st->time_base) - 1;
278         /* do not send the heartbeat frame if the subtitle is already ahead */
279         if (pts2 <= ist2->sub2video.last_pts)
280             continue;
281         if (pts2 >= ist2->sub2video.end_pts || !ist2->sub2video.frame->data[0])
282             sub2video_update(ist2, NULL);
283         for (j = 0, nb_reqs = 0; j < ist2->nb_filters; j++)
284             nb_reqs += av_buffersrc_get_nb_failed_requests(ist2->filters[j]->filter);
285         if (nb_reqs)
286             sub2video_push_ref(ist2, pts2);
287     }
288 }
289
290 static void sub2video_flush(InputStream *ist)
291 {
292     int i;
293
294     if (ist->sub2video.end_pts < INT64_MAX)
295         sub2video_update(ist, NULL);
296     for (i = 0; i < ist->nb_filters; i++)
297         av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
298 }
299
300 /* end of sub2video hack */
301
302 static void term_exit_sigsafe(void)
303 {
304 #if HAVE_TERMIOS_H
305     if(restore_tty)
306         tcsetattr (0, TCSANOW, &oldtty);
307 #endif
308 }
309
310 void term_exit(void)
311 {
312     av_log(NULL, AV_LOG_QUIET, "%s", "");
313     term_exit_sigsafe();
314 }
315
316 static volatile int received_sigterm = 0;
317 static volatile int received_nb_signals = 0;
318 static volatile int transcode_init_done = 0;
319 static volatile int ffmpeg_exited = 0;
320 static int main_return_code = 0;
321
322 static void
323 sigterm_handler(int sig)
324 {
325     received_sigterm = sig;
326     received_nb_signals++;
327     term_exit_sigsafe();
328     if(received_nb_signals > 3) {
329         write(2/*STDERR_FILENO*/, "Received > 3 system signals, hard exiting\n",
330                            strlen("Received > 3 system signals, hard exiting\n"));
331
332         exit(123);
333     }
334 }
335
336 #if HAVE_SETCONSOLECTRLHANDLER
337 static BOOL WINAPI CtrlHandler(DWORD fdwCtrlType)
338 {
339     av_log(NULL, AV_LOG_DEBUG, "\nReceived windows signal %ld\n", fdwCtrlType);
340
341     switch (fdwCtrlType)
342     {
343     case CTRL_C_EVENT:
344     case CTRL_BREAK_EVENT:
345         sigterm_handler(SIGINT);
346         return TRUE;
347
348     case CTRL_CLOSE_EVENT:
349     case CTRL_LOGOFF_EVENT:
350     case CTRL_SHUTDOWN_EVENT:
351         sigterm_handler(SIGTERM);
352         /* Basically, with these 3 events, when we return from this method the
353            process is hard terminated, so stall as long as we need to
354            to try and let the main thread(s) clean up and gracefully terminate
355            (we have at most 5 seconds, but should be done far before that). */
356         while (!ffmpeg_exited) {
357             Sleep(0);
358         }
359         return TRUE;
360
361     default:
362         av_log(NULL, AV_LOG_ERROR, "Received unknown windows signal %ld\n", fdwCtrlType);
363         return FALSE;
364     }
365 }
366 #endif
367
368 void term_init(void)
369 {
370 #if HAVE_TERMIOS_H
371     if(!run_as_daemon){
372         struct termios tty;
373         int istty = 1;
374 #if HAVE_ISATTY
375         istty = isatty(0) && isatty(2);
376 #endif
377         if (istty && tcgetattr (0, &tty) == 0) {
378             oldtty = tty;
379             restore_tty = 1;
380
381             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
382                              |INLCR|IGNCR|ICRNL|IXON);
383             tty.c_oflag |= OPOST;
384             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
385             tty.c_cflag &= ~(CSIZE|PARENB);
386             tty.c_cflag |= CS8;
387             tty.c_cc[VMIN] = 1;
388             tty.c_cc[VTIME] = 0;
389
390             tcsetattr (0, TCSANOW, &tty);
391         }
392         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
393     }
394 #endif
395
396     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
397     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
398 #ifdef SIGXCPU
399     signal(SIGXCPU, sigterm_handler);
400 #endif
401 #if HAVE_SETCONSOLECTRLHANDLER
402     SetConsoleCtrlHandler((PHANDLER_ROUTINE) CtrlHandler, TRUE);
403 #endif
404 }
405
406 /* read a key without blocking */
407 static int read_key(void)
408 {
409     unsigned char ch;
410 #if HAVE_TERMIOS_H
411     int n = 1;
412     struct timeval tv;
413     fd_set rfds;
414
415     FD_ZERO(&rfds);
416     FD_SET(0, &rfds);
417     tv.tv_sec = 0;
418     tv.tv_usec = 0;
419     n = select(1, &rfds, NULL, NULL, &tv);
420     if (n > 0) {
421         n = read(0, &ch, 1);
422         if (n == 1)
423             return ch;
424
425         return n;
426     }
427 #elif HAVE_KBHIT
428 #    if HAVE_PEEKNAMEDPIPE
429     static int is_pipe;
430     static HANDLE input_handle;
431     DWORD dw, nchars;
432     if(!input_handle){
433         input_handle = GetStdHandle(STD_INPUT_HANDLE);
434         is_pipe = !GetConsoleMode(input_handle, &dw);
435     }
436
437     if (is_pipe) {
438         /* When running under a GUI, you will end here. */
439         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL)) {
440             // input pipe may have been closed by the program that ran ffmpeg
441             return -1;
442         }
443         //Read it
444         if(nchars != 0) {
445             read(0, &ch, 1);
446             return ch;
447         }else{
448             return -1;
449         }
450     }
451 #    endif
452     if(kbhit())
453         return(getch());
454 #endif
455     return -1;
456 }
457
458 static int decode_interrupt_cb(void *ctx)
459 {
460     return received_nb_signals > transcode_init_done;
461 }
462
463 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
464
465 static void ffmpeg_cleanup(int ret)
466 {
467     int i, j;
468
469     if (do_benchmark) {
470         int maxrss = getmaxrss() / 1024;
471         av_log(NULL, AV_LOG_INFO, "bench: maxrss=%ikB\n", maxrss);
472     }
473
474     for (i = 0; i < nb_filtergraphs; i++) {
475         FilterGraph *fg = filtergraphs[i];
476         avfilter_graph_free(&fg->graph);
477         for (j = 0; j < fg->nb_inputs; j++) {
478             av_freep(&fg->inputs[j]->name);
479             av_freep(&fg->inputs[j]);
480         }
481         av_freep(&fg->inputs);
482         for (j = 0; j < fg->nb_outputs; j++) {
483             av_freep(&fg->outputs[j]->name);
484             av_freep(&fg->outputs[j]);
485         }
486         av_freep(&fg->outputs);
487         av_freep(&fg->graph_desc);
488
489         av_freep(&filtergraphs[i]);
490     }
491     av_freep(&filtergraphs);
492
493     av_freep(&subtitle_out);
494
495     /* close files */
496     for (i = 0; i < nb_output_files; i++) {
497         OutputFile *of = output_files[i];
498         AVFormatContext *s;
499         if (!of)
500             continue;
501         s = of->ctx;
502         if (s && s->oformat && !(s->oformat->flags & AVFMT_NOFILE))
503             avio_closep(&s->pb);
504         avformat_free_context(s);
505         av_dict_free(&of->opts);
506
507         av_freep(&output_files[i]);
508     }
509     for (i = 0; i < nb_output_streams; i++) {
510         OutputStream *ost = output_streams[i];
511         AVBitStreamFilterContext *bsfc;
512
513         if (!ost)
514             continue;
515
516         bsfc = ost->bitstream_filters;
517         while (bsfc) {
518             AVBitStreamFilterContext *next = bsfc->next;
519             av_bitstream_filter_close(bsfc);
520             bsfc = next;
521         }
522         ost->bitstream_filters = NULL;
523         av_frame_free(&ost->filtered_frame);
524         av_frame_free(&ost->last_frame);
525
526         av_parser_close(ost->parser);
527
528         av_freep(&ost->forced_keyframes);
529         av_expr_free(ost->forced_keyframes_pexpr);
530         av_freep(&ost->avfilter);
531         av_freep(&ost->logfile_prefix);
532
533         av_freep(&ost->audio_channels_map);
534         ost->audio_channels_mapped = 0;
535
536         avcodec_free_context(&ost->enc_ctx);
537
538         av_freep(&output_streams[i]);
539     }
540 #if HAVE_PTHREADS
541     free_input_threads();
542 #endif
543     for (i = 0; i < nb_input_files; i++) {
544         avformat_close_input(&input_files[i]->ctx);
545         av_freep(&input_files[i]);
546     }
547     for (i = 0; i < nb_input_streams; i++) {
548         InputStream *ist = input_streams[i];
549
550         av_frame_free(&ist->decoded_frame);
551         av_frame_free(&ist->filter_frame);
552         av_dict_free(&ist->decoder_opts);
553         avsubtitle_free(&ist->prev_sub.subtitle);
554         av_frame_free(&ist->sub2video.frame);
555         av_freep(&ist->filters);
556         av_freep(&ist->hwaccel_device);
557
558         avcodec_free_context(&ist->dec_ctx);
559
560         av_freep(&input_streams[i]);
561     }
562
563     if (vstats_file)
564         fclose(vstats_file);
565     av_freep(&vstats_filename);
566
567     av_freep(&input_streams);
568     av_freep(&input_files);
569     av_freep(&output_streams);
570     av_freep(&output_files);
571
572     uninit_opts();
573
574     avformat_network_deinit();
575
576     if (received_sigterm) {
577         av_log(NULL, AV_LOG_INFO, "Exiting normally, received signal %d.\n",
578                (int) received_sigterm);
579     } else if (ret && transcode_init_done) {
580         av_log(NULL, AV_LOG_INFO, "Conversion failed!\n");
581     }
582     term_exit();
583     ffmpeg_exited = 1;
584 }
585
586 void remove_avoptions(AVDictionary **a, AVDictionary *b)
587 {
588     AVDictionaryEntry *t = NULL;
589
590     while ((t = av_dict_get(b, "", t, AV_DICT_IGNORE_SUFFIX))) {
591         av_dict_set(a, t->key, NULL, AV_DICT_MATCH_CASE);
592     }
593 }
594
595 void assert_avoptions(AVDictionary *m)
596 {
597     AVDictionaryEntry *t;
598     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
599         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
600         exit_program(1);
601     }
602 }
603
604 static void abort_codec_experimental(AVCodec *c, int encoder)
605 {
606     exit_program(1);
607 }
608
609 static void update_benchmark(const char *fmt, ...)
610 {
611     if (do_benchmark_all) {
612         int64_t t = getutime();
613         va_list va;
614         char buf[1024];
615
616         if (fmt) {
617             va_start(va, fmt);
618             vsnprintf(buf, sizeof(buf), fmt, va);
619             va_end(va);
620             av_log(NULL, AV_LOG_INFO, "bench: %8"PRIu64" %s \n", t - current_time, buf);
621         }
622         current_time = t;
623     }
624 }
625
626 static void close_all_output_streams(OutputStream *ost, OSTFinished this_stream, OSTFinished others)
627 {
628     int i;
629     for (i = 0; i < nb_output_streams; i++) {
630         OutputStream *ost2 = output_streams[i];
631         ost2->finished |= ost == ost2 ? this_stream : others;
632     }
633 }
634
635 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
636 {
637     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
638     AVCodecContext          *avctx = ost->encoding_needed ? ost->enc_ctx : ost->st->codec;
639     int ret;
640
641     if (!ost->st->codec->extradata_size && ost->enc_ctx->extradata_size) {
642         ost->st->codec->extradata = av_mallocz(ost->enc_ctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
643         if (ost->st->codec->extradata) {
644             memcpy(ost->st->codec->extradata, ost->enc_ctx->extradata, ost->enc_ctx->extradata_size);
645             ost->st->codec->extradata_size = ost->enc_ctx->extradata_size;
646         }
647     }
648
649     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
650         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
651         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
652
653     /*
654      * Audio encoders may split the packets --  #frames in != #packets out.
655      * But there is no reordering, so we can limit the number of output packets
656      * by simply dropping them here.
657      * Counting encoded video frames needs to be done separately because of
658      * reordering, see do_video_out()
659      */
660     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
661         if (ost->frame_number >= ost->max_frames) {
662             av_free_packet(pkt);
663             return;
664         }
665         ost->frame_number++;
666     }
667     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
668         int i;
669         uint8_t *sd = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS,
670                                               NULL);
671         ost->quality = sd ? AV_RL32(sd) : -1;
672         ost->pict_type = sd ? sd[4] : AV_PICTURE_TYPE_NONE;
673
674         for (i = 0; i<FF_ARRAY_ELEMS(ost->error); i++) {
675             if (sd && i < sd[5])
676                 ost->error[i] = AV_RL64(sd + 8 + 8*i);
677             else
678                 ost->error[i] = -1;
679         }
680     }
681
682     if (bsfc)
683         av_packet_split_side_data(pkt);
684
685     while (bsfc) {
686         AVPacket new_pkt = *pkt;
687         AVDictionaryEntry *bsf_arg = av_dict_get(ost->bsf_args,
688                                                  bsfc->filter->name,
689                                                  NULL, 0);
690         int a = av_bitstream_filter_filter(bsfc, avctx,
691                                            bsf_arg ? bsf_arg->value : NULL,
692                                            &new_pkt.data, &new_pkt.size,
693                                            pkt->data, pkt->size,
694                                            pkt->flags & AV_PKT_FLAG_KEY);
695 FF_DISABLE_DEPRECATION_WARNINGS
696         if(a == 0 && new_pkt.data != pkt->data
697 #if FF_API_DESTRUCT_PACKET
698            && new_pkt.destruct
699 #endif
700            ) {
701 FF_ENABLE_DEPRECATION_WARNINGS
702             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
703             if(t) {
704                 memcpy(t, new_pkt.data, new_pkt.size);
705                 memset(t + new_pkt.size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
706                 new_pkt.data = t;
707                 new_pkt.buf = NULL;
708                 a = 1;
709             } else
710                 a = AVERROR(ENOMEM);
711         }
712         if (a > 0) {
713             pkt->side_data = NULL;
714             pkt->side_data_elems = 0;
715             av_free_packet(pkt);
716             new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
717                                            av_buffer_default_free, NULL, 0);
718             if (!new_pkt.buf)
719                 exit_program(1);
720         } else if (a < 0) {
721             new_pkt = *pkt;
722             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
723                    bsfc->filter->name, pkt->stream_index,
724                    avctx->codec ? avctx->codec->name : "copy");
725             print_error("", a);
726             if (exit_on_error)
727                 exit_program(1);
728         }
729         *pkt = new_pkt;
730
731         bsfc = bsfc->next;
732     }
733
734     if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
735         if (pkt->dts != AV_NOPTS_VALUE &&
736             pkt->pts != AV_NOPTS_VALUE &&
737             pkt->dts > pkt->pts) {
738             av_log(s, AV_LOG_WARNING, "Invalid DTS: %"PRId64" PTS: %"PRId64" in output stream %d:%d, replacing by guess\n",
739                    pkt->dts, pkt->pts,
740                    ost->file_index, ost->st->index);
741             pkt->pts =
742             pkt->dts = pkt->pts + pkt->dts + ost->last_mux_dts + 1
743                      - FFMIN3(pkt->pts, pkt->dts, ost->last_mux_dts + 1)
744                      - FFMAX3(pkt->pts, pkt->dts, ost->last_mux_dts + 1);
745         }
746      if(
747         (avctx->codec_type == AVMEDIA_TYPE_AUDIO || avctx->codec_type == AVMEDIA_TYPE_VIDEO) &&
748         pkt->dts != AV_NOPTS_VALUE &&
749         ost->last_mux_dts != AV_NOPTS_VALUE) {
750       int64_t max = ost->last_mux_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
751       if (pkt->dts < max) {
752         int loglevel = max - pkt->dts > 2 || avctx->codec_type == AVMEDIA_TYPE_VIDEO ? AV_LOG_WARNING : AV_LOG_DEBUG;
753         av_log(s, loglevel, "Non-monotonous DTS in output stream "
754                "%d:%d; previous: %"PRId64", current: %"PRId64"; ",
755                ost->file_index, ost->st->index, ost->last_mux_dts, pkt->dts);
756         if (exit_on_error) {
757             av_log(NULL, AV_LOG_FATAL, "aborting.\n");
758             exit_program(1);
759         }
760         av_log(s, loglevel, "changing to %"PRId64". This may result "
761                "in incorrect timestamps in the output file.\n",
762                max);
763         if(pkt->pts >= pkt->dts)
764             pkt->pts = FFMAX(pkt->pts, max);
765         pkt->dts = max;
766       }
767      }
768     }
769     ost->last_mux_dts = pkt->dts;
770
771     ost->data_size += pkt->size;
772     ost->packets_written++;
773
774     pkt->stream_index = ost->index;
775
776     if (debug_ts) {
777         av_log(NULL, AV_LOG_INFO, "muxer <- type:%s "
778                 "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s size:%d\n",
779                 av_get_media_type_string(ost->enc_ctx->codec_type),
780                 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ost->st->time_base),
781                 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->st->time_base),
782                 pkt->size
783               );
784     }
785
786     ret = av_interleaved_write_frame(s, pkt);
787     if (ret < 0) {
788         print_error("av_interleaved_write_frame()", ret);
789         main_return_code = 1;
790         close_all_output_streams(ost, MUXER_FINISHED | ENCODER_FINISHED, ENCODER_FINISHED);
791     }
792     av_free_packet(pkt);
793 }
794
795 static void close_output_stream(OutputStream *ost)
796 {
797     OutputFile *of = output_files[ost->file_index];
798
799     ost->finished |= ENCODER_FINISHED;
800     if (of->shortest) {
801         int64_t end = av_rescale_q(ost->sync_opts - ost->first_pts, ost->enc_ctx->time_base, AV_TIME_BASE_Q);
802         of->recording_time = FFMIN(of->recording_time, end);
803     }
804 }
805
806 static int check_recording_time(OutputStream *ost)
807 {
808     OutputFile *of = output_files[ost->file_index];
809
810     if (of->recording_time != INT64_MAX &&
811         av_compare_ts(ost->sync_opts - ost->first_pts, ost->enc_ctx->time_base, of->recording_time,
812                       AV_TIME_BASE_Q) >= 0) {
813         close_output_stream(ost);
814         return 0;
815     }
816     return 1;
817 }
818
819 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
820                          AVFrame *frame)
821 {
822     AVCodecContext *enc = ost->enc_ctx;
823     AVPacket pkt;
824     int got_packet = 0;
825
826     av_init_packet(&pkt);
827     pkt.data = NULL;
828     pkt.size = 0;
829
830     if (!check_recording_time(ost))
831         return;
832
833     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
834         frame->pts = ost->sync_opts;
835     ost->sync_opts = frame->pts + frame->nb_samples;
836     ost->samples_encoded += frame->nb_samples;
837     ost->frames_encoded++;
838
839     av_assert0(pkt.size || !pkt.data);
840     update_benchmark(NULL);
841     if (debug_ts) {
842         av_log(NULL, AV_LOG_INFO, "encoder <- type:audio "
843                "frame_pts:%s frame_pts_time:%s time_base:%d/%d\n",
844                av_ts2str(frame->pts), av_ts2timestr(frame->pts, &enc->time_base),
845                enc->time_base.num, enc->time_base.den);
846     }
847
848     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
849         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
850         exit_program(1);
851     }
852     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
853
854     if (got_packet) {
855         av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
856
857         if (debug_ts) {
858             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
859                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
860                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
861                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
862         }
863
864         write_frame(s, &pkt, ost);
865     }
866 }
867
868 static void do_subtitle_out(AVFormatContext *s,
869                             OutputStream *ost,
870                             InputStream *ist,
871                             AVSubtitle *sub)
872 {
873     int subtitle_out_max_size = 1024 * 1024;
874     int subtitle_out_size, nb, i;
875     AVCodecContext *enc;
876     AVPacket pkt;
877     int64_t pts;
878
879     if (sub->pts == AV_NOPTS_VALUE) {
880         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
881         if (exit_on_error)
882             exit_program(1);
883         return;
884     }
885
886     enc = ost->enc_ctx;
887
888     if (!subtitle_out) {
889         subtitle_out = av_malloc(subtitle_out_max_size);
890         if (!subtitle_out) {
891             av_log(NULL, AV_LOG_FATAL, "Failed to allocate subtitle_out\n");
892             exit_program(1);
893         }
894     }
895
896     /* Note: DVB subtitle need one packet to draw them and one other
897        packet to clear them */
898     /* XXX: signal it in the codec context ? */
899     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
900         nb = 2;
901     else
902         nb = 1;
903
904     /* shift timestamp to honor -ss and make check_recording_time() work with -t */
905     pts = sub->pts;
906     if (output_files[ost->file_index]->start_time != AV_NOPTS_VALUE)
907         pts -= output_files[ost->file_index]->start_time;
908     for (i = 0; i < nb; i++) {
909         unsigned save_num_rects = sub->num_rects;
910
911         ost->sync_opts = av_rescale_q(pts, AV_TIME_BASE_Q, enc->time_base);
912         if (!check_recording_time(ost))
913             return;
914
915         sub->pts = pts;
916         // start_display_time is required to be 0
917         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
918         sub->end_display_time  -= sub->start_display_time;
919         sub->start_display_time = 0;
920         if (i == 1)
921             sub->num_rects = 0;
922
923         ost->frames_encoded++;
924
925         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
926                                                     subtitle_out_max_size, sub);
927         if (i == 1)
928             sub->num_rects = save_num_rects;
929         if (subtitle_out_size < 0) {
930             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
931             exit_program(1);
932         }
933
934         av_init_packet(&pkt);
935         pkt.data = subtitle_out;
936         pkt.size = subtitle_out_size;
937         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
938         pkt.duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->st->time_base);
939         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
940             /* XXX: the pts correction is handled here. Maybe handling
941                it in the codec would be better */
942             if (i == 0)
943                 pkt.pts += 90 * sub->start_display_time;
944             else
945                 pkt.pts += 90 * sub->end_display_time;
946         }
947         pkt.dts = pkt.pts;
948         write_frame(s, &pkt, ost);
949     }
950 }
951
952 static void do_video_out(AVFormatContext *s,
953                          OutputStream *ost,
954                          AVFrame *next_picture,
955                          double sync_ipts)
956 {
957     int ret, format_video_sync;
958     AVPacket pkt;
959     AVCodecContext *enc = ost->enc_ctx;
960     AVCodecContext *mux_enc = ost->st->codec;
961     int nb_frames, nb0_frames, i;
962     double delta, delta0;
963     double duration = 0;
964     int frame_size = 0;
965     InputStream *ist = NULL;
966     AVFilterContext *filter = ost->filter->filter;
967
968     if (ost->source_index >= 0)
969         ist = input_streams[ost->source_index];
970
971     if (filter->inputs[0]->frame_rate.num > 0 &&
972         filter->inputs[0]->frame_rate.den > 0)
973         duration = 1/(av_q2d(filter->inputs[0]->frame_rate) * av_q2d(enc->time_base));
974
975     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
976         duration = FFMIN(duration, 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base)));
977
978     if (!ost->filters_script &&
979         !ost->filters &&
980         next_picture &&
981         ist &&
982         lrintf(av_frame_get_pkt_duration(next_picture) * av_q2d(ist->st->time_base) / av_q2d(enc->time_base)) > 0) {
983         duration = lrintf(av_frame_get_pkt_duration(next_picture) * av_q2d(ist->st->time_base) / av_q2d(enc->time_base));
984     }
985
986     if (!next_picture) {
987         //end, flushing
988         nb0_frames = nb_frames = mid_pred(ost->last_nb0_frames[0],
989                                           ost->last_nb0_frames[1],
990                                           ost->last_nb0_frames[2]);
991     } else {
992         delta0 = sync_ipts - ost->sync_opts;
993         delta  = delta0 + duration;
994
995         /* by default, we output a single frame */
996         nb0_frames = 0;
997         nb_frames = 1;
998
999         format_video_sync = video_sync_method;
1000         if (format_video_sync == VSYNC_AUTO) {
1001             if(!strcmp(s->oformat->name, "avi")) {
1002                 format_video_sync = VSYNC_VFR;
1003             } else
1004                 format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : VSYNC_CFR;
1005             if (   ist
1006                 && format_video_sync == VSYNC_CFR
1007                 && input_files[ist->file_index]->ctx->nb_streams == 1
1008                 && input_files[ist->file_index]->input_ts_offset == 0) {
1009                 format_video_sync = VSYNC_VSCFR;
1010             }
1011             if (format_video_sync == VSYNC_CFR && copy_ts) {
1012                 format_video_sync = VSYNC_VSCFR;
1013             }
1014         }
1015
1016         if (delta0 < 0 &&
1017             delta > 0 &&
1018             format_video_sync != VSYNC_PASSTHROUGH &&
1019             format_video_sync != VSYNC_DROP) {
1020             double cor = FFMIN(-delta0, duration);
1021             if (delta0 < -0.6) {
1022                 av_log(NULL, AV_LOG_WARNING, "Past duration %f too large\n", -delta0);
1023             } else
1024                 av_log(NULL, AV_LOG_DEBUG, "Cliping frame in rate conversion by %f\n", -delta0);
1025             sync_ipts += cor;
1026             duration -= cor;
1027             delta0 += cor;
1028         }
1029
1030         switch (format_video_sync) {
1031         case VSYNC_VSCFR:
1032             if (ost->frame_number == 0 && delta - duration >= 0.5) {
1033                 av_log(NULL, AV_LOG_DEBUG, "Not duplicating %d initial frames\n", (int)lrintf(delta - duration));
1034                 delta = duration;
1035                 delta0 = 0;
1036                 ost->sync_opts = lrint(sync_ipts);
1037             }
1038         case VSYNC_CFR:
1039             // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
1040             if (frame_drop_threshold && delta < frame_drop_threshold && ost->frame_number) {
1041                 nb_frames = 0;
1042             } else if (delta < -1.1)
1043                 nb_frames = 0;
1044             else if (delta > 1.1) {
1045                 nb_frames = lrintf(delta);
1046                 if (delta0 > 1.1)
1047                     nb0_frames = lrintf(delta0 - 0.6);
1048             }
1049             break;
1050         case VSYNC_VFR:
1051             if (delta <= -0.6)
1052                 nb_frames = 0;
1053             else if (delta > 0.6)
1054                 ost->sync_opts = lrint(sync_ipts);
1055             break;
1056         case VSYNC_DROP:
1057         case VSYNC_PASSTHROUGH:
1058             ost->sync_opts = lrint(sync_ipts);
1059             break;
1060         default:
1061             av_assert0(0);
1062         }
1063     }
1064
1065     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
1066     nb0_frames = FFMIN(nb0_frames, nb_frames);
1067
1068     memmove(ost->last_nb0_frames + 1,
1069             ost->last_nb0_frames,
1070             sizeof(ost->last_nb0_frames[0]) * (FF_ARRAY_ELEMS(ost->last_nb0_frames) - 1));
1071     ost->last_nb0_frames[0] = nb0_frames;
1072
1073     if (nb0_frames == 0 && ost->last_droped) {
1074         nb_frames_drop++;
1075         av_log(NULL, AV_LOG_VERBOSE,
1076                "*** dropping frame %d from stream %d at ts %"PRId64"\n",
1077                ost->frame_number, ost->st->index, ost->last_frame->pts);
1078     }
1079     if (nb_frames > (nb0_frames && ost->last_droped) + (nb_frames > nb0_frames)) {
1080         if (nb_frames > dts_error_threshold * 30) {
1081             av_log(NULL, AV_LOG_ERROR, "%d frame duplication too large, skipping\n", nb_frames - 1);
1082             nb_frames_drop++;
1083             return;
1084         }
1085         nb_frames_dup += nb_frames - (nb0_frames && ost->last_droped) - (nb_frames > nb0_frames);
1086         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
1087     }
1088     ost->last_droped = nb_frames == nb0_frames && next_picture;
1089
1090   /* duplicates frame if needed */
1091   for (i = 0; i < nb_frames; i++) {
1092     AVFrame *in_picture;
1093     av_init_packet(&pkt);
1094     pkt.data = NULL;
1095     pkt.size = 0;
1096
1097     if (i < nb0_frames && ost->last_frame) {
1098         in_picture = ost->last_frame;
1099     } else
1100         in_picture = next_picture;
1101
1102     if (!in_picture)
1103         return;
1104
1105     in_picture->pts = ost->sync_opts;
1106
1107 #if 1
1108     if (!check_recording_time(ost))
1109 #else
1110     if (ost->frame_number >= ost->max_frames)
1111 #endif
1112         return;
1113
1114     if (s->oformat->flags & AVFMT_RAWPICTURE &&
1115         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
1116         /* raw pictures are written as AVPicture structure to
1117            avoid any copies. We support temporarily the older
1118            method. */
1119         if (in_picture->interlaced_frame)
1120             mux_enc->field_order = in_picture->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
1121         else
1122             mux_enc->field_order = AV_FIELD_PROGRESSIVE;
1123         pkt.data   = (uint8_t *)in_picture;
1124         pkt.size   =  sizeof(AVPicture);
1125         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
1126         pkt.flags |= AV_PKT_FLAG_KEY;
1127
1128         write_frame(s, &pkt, ost);
1129     } else {
1130         int got_packet, forced_keyframe = 0;
1131         double pts_time;
1132
1133         if (enc->flags & (AV_CODEC_FLAG_INTERLACED_DCT | AV_CODEC_FLAG_INTERLACED_ME) &&
1134             ost->top_field_first >= 0)
1135             in_picture->top_field_first = !!ost->top_field_first;
1136
1137         if (in_picture->interlaced_frame) {
1138             if (enc->codec->id == AV_CODEC_ID_MJPEG)
1139                 mux_enc->field_order = in_picture->top_field_first ? AV_FIELD_TT:AV_FIELD_BB;
1140             else
1141                 mux_enc->field_order = in_picture->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
1142         } else
1143             mux_enc->field_order = AV_FIELD_PROGRESSIVE;
1144
1145         in_picture->quality = enc->global_quality;
1146         in_picture->pict_type = 0;
1147
1148         pts_time = in_picture->pts != AV_NOPTS_VALUE ?
1149             in_picture->pts * av_q2d(enc->time_base) : NAN;
1150         if (ost->forced_kf_index < ost->forced_kf_count &&
1151             in_picture->pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1152             ost->forced_kf_index++;
1153             forced_keyframe = 1;
1154         } else if (ost->forced_keyframes_pexpr) {
1155             double res;
1156             ost->forced_keyframes_expr_const_values[FKF_T] = pts_time;
1157             res = av_expr_eval(ost->forced_keyframes_pexpr,
1158                                ost->forced_keyframes_expr_const_values, NULL);
1159             ff_dlog(NULL, "force_key_frame: n:%f n_forced:%f prev_forced_n:%f t:%f prev_forced_t:%f -> res:%f\n",
1160                     ost->forced_keyframes_expr_const_values[FKF_N],
1161                     ost->forced_keyframes_expr_const_values[FKF_N_FORCED],
1162                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N],
1163                     ost->forced_keyframes_expr_const_values[FKF_T],
1164                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T],
1165                     res);
1166             if (res) {
1167                 forced_keyframe = 1;
1168                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] =
1169                     ost->forced_keyframes_expr_const_values[FKF_N];
1170                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] =
1171                     ost->forced_keyframes_expr_const_values[FKF_T];
1172                 ost->forced_keyframes_expr_const_values[FKF_N_FORCED] += 1;
1173             }
1174
1175             ost->forced_keyframes_expr_const_values[FKF_N] += 1;
1176         } else if (   ost->forced_keyframes
1177                    && !strncmp(ost->forced_keyframes, "source", 6)
1178                    && in_picture->key_frame==1) {
1179             forced_keyframe = 1;
1180         }
1181
1182         if (forced_keyframe) {
1183             in_picture->pict_type = AV_PICTURE_TYPE_I;
1184             av_log(NULL, AV_LOG_DEBUG, "Forced keyframe at time %f\n", pts_time);
1185         }
1186
1187         update_benchmark(NULL);
1188         if (debug_ts) {
1189             av_log(NULL, AV_LOG_INFO, "encoder <- type:video "
1190                    "frame_pts:%s frame_pts_time:%s time_base:%d/%d\n",
1191                    av_ts2str(in_picture->pts), av_ts2timestr(in_picture->pts, &enc->time_base),
1192                    enc->time_base.num, enc->time_base.den);
1193         }
1194
1195         ost->frames_encoded++;
1196
1197         ret = avcodec_encode_video2(enc, &pkt, in_picture, &got_packet);
1198         update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
1199         if (ret < 0) {
1200             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1201             exit_program(1);
1202         }
1203
1204         if (got_packet) {
1205             if (debug_ts) {
1206                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1207                        "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1208                        av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &enc->time_base),
1209                        av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &enc->time_base));
1210             }
1211
1212             if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & AV_CODEC_CAP_DELAY))
1213                 pkt.pts = ost->sync_opts;
1214
1215             av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
1216
1217             if (debug_ts) {
1218                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1219                     "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1220                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1221                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1222             }
1223
1224             frame_size = pkt.size;
1225             write_frame(s, &pkt, ost);
1226
1227             /* if two pass, output log */
1228             if (ost->logfile && enc->stats_out) {
1229                 fprintf(ost->logfile, "%s", enc->stats_out);
1230             }
1231         }
1232     }
1233     ost->sync_opts++;
1234     /*
1235      * For video, number of frames in == number of packets out.
1236      * But there may be reordering, so we can't throw away frames on encoder
1237      * flush, we need to limit them here, before they go into encoder.
1238      */
1239     ost->frame_number++;
1240
1241     if (vstats_filename && frame_size)
1242         do_video_stats(ost, frame_size);
1243   }
1244
1245     if (!ost->last_frame)
1246         ost->last_frame = av_frame_alloc();
1247     av_frame_unref(ost->last_frame);
1248     if (next_picture && ost->last_frame)
1249         av_frame_ref(ost->last_frame, next_picture);
1250     else
1251         av_frame_free(&ost->last_frame);
1252 }
1253
1254 static double psnr(double d)
1255 {
1256     return -10.0 * log(d) / log(10.0);
1257 }
1258
1259 static void do_video_stats(OutputStream *ost, int frame_size)
1260 {
1261     AVCodecContext *enc;
1262     int frame_number;
1263     double ti1, bitrate, avg_bitrate;
1264
1265     /* this is executed just the first time do_video_stats is called */
1266     if (!vstats_file) {
1267         vstats_file = fopen(vstats_filename, "w");
1268         if (!vstats_file) {
1269             perror("fopen");
1270             exit_program(1);
1271         }
1272     }
1273
1274     enc = ost->enc_ctx;
1275     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1276         frame_number = ost->st->nb_frames;
1277         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number,
1278                 ost->quality / (float)FF_QP2LAMBDA);
1279
1280         if (ost->error[0]>=0 && (enc->flags & AV_CODEC_FLAG_PSNR))
1281             fprintf(vstats_file, "PSNR= %6.2f ", psnr(ost->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1282
1283         fprintf(vstats_file,"f_size= %6d ", frame_size);
1284         /* compute pts value */
1285         ti1 = av_stream_get_end_pts(ost->st) * av_q2d(ost->st->time_base);
1286         if (ti1 < 0.01)
1287             ti1 = 0.01;
1288
1289         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1290         avg_bitrate = (double)(ost->data_size * 8) / ti1 / 1000.0;
1291         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1292                (double)ost->data_size / 1024, ti1, bitrate, avg_bitrate);
1293         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(ost->pict_type));
1294     }
1295 }
1296
1297 static void finish_output_stream(OutputStream *ost)
1298 {
1299     OutputFile *of = output_files[ost->file_index];
1300     int i;
1301
1302     ost->finished = ENCODER_FINISHED | MUXER_FINISHED;
1303
1304     if (of->shortest) {
1305         for (i = 0; i < of->ctx->nb_streams; i++)
1306             output_streams[of->ost_index + i]->finished = ENCODER_FINISHED | MUXER_FINISHED;
1307     }
1308 }
1309
1310 /**
1311  * Get and encode new output from any of the filtergraphs, without causing
1312  * activity.
1313  *
1314  * @return  0 for success, <0 for severe errors
1315  */
1316 static int reap_filters(int flush)
1317 {
1318     AVFrame *filtered_frame = NULL;
1319     int i;
1320
1321     /* Reap all buffers present in the buffer sinks */
1322     for (i = 0; i < nb_output_streams; i++) {
1323         OutputStream *ost = output_streams[i];
1324         OutputFile    *of = output_files[ost->file_index];
1325         AVFilterContext *filter;
1326         AVCodecContext *enc = ost->enc_ctx;
1327         int ret = 0;
1328
1329         if (!ost->filter)
1330             continue;
1331         filter = ost->filter->filter;
1332
1333         if (!ost->filtered_frame && !(ost->filtered_frame = av_frame_alloc())) {
1334             return AVERROR(ENOMEM);
1335         }
1336         filtered_frame = ost->filtered_frame;
1337
1338         while (1) {
1339             double float_pts = AV_NOPTS_VALUE; // this is identical to filtered_frame.pts but with higher precision
1340             ret = av_buffersink_get_frame_flags(filter, filtered_frame,
1341                                                AV_BUFFERSINK_FLAG_NO_REQUEST);
1342             if (ret < 0) {
1343                 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1344                     av_log(NULL, AV_LOG_WARNING,
1345                            "Error in av_buffersink_get_frame_flags(): %s\n", av_err2str(ret));
1346                 } else if (flush && ret == AVERROR_EOF) {
1347                     if (filter->inputs[0]->type == AVMEDIA_TYPE_VIDEO)
1348                         do_video_out(of->ctx, ost, NULL, AV_NOPTS_VALUE);
1349                 }
1350                 break;
1351             }
1352             if (ost->finished) {
1353                 av_frame_unref(filtered_frame);
1354                 continue;
1355             }
1356             if (filtered_frame->pts != AV_NOPTS_VALUE) {
1357                 int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1358                 AVRational tb = enc->time_base;
1359                 int extra_bits = av_clip(29 - av_log2(tb.den), 0, 16);
1360
1361                 tb.den <<= extra_bits;
1362                 float_pts =
1363                     av_rescale_q(filtered_frame->pts, filter->inputs[0]->time_base, tb) -
1364                     av_rescale_q(start_time, AV_TIME_BASE_Q, tb);
1365                 float_pts /= 1 << extra_bits;
1366                 // 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
1367                 float_pts += FFSIGN(float_pts) * 1.0 / (1<<17);
1368
1369                 filtered_frame->pts =
1370                     av_rescale_q(filtered_frame->pts, filter->inputs[0]->time_base, enc->time_base) -
1371                     av_rescale_q(start_time, AV_TIME_BASE_Q, enc->time_base);
1372             }
1373             //if (ost->source_index >= 0)
1374             //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1375
1376             switch (filter->inputs[0]->type) {
1377             case AVMEDIA_TYPE_VIDEO:
1378                 if (!ost->frame_aspect_ratio.num)
1379                     enc->sample_aspect_ratio = filtered_frame->sample_aspect_ratio;
1380
1381                 if (debug_ts) {
1382                     av_log(NULL, AV_LOG_INFO, "filter -> pts:%s pts_time:%s exact:%f time_base:%d/%d\n",
1383                             av_ts2str(filtered_frame->pts), av_ts2timestr(filtered_frame->pts, &enc->time_base),
1384                             float_pts,
1385                             enc->time_base.num, enc->time_base.den);
1386                 }
1387
1388                 do_video_out(of->ctx, ost, filtered_frame, float_pts);
1389                 break;
1390             case AVMEDIA_TYPE_AUDIO:
1391                 if (!(enc->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE) &&
1392                     enc->channels != av_frame_get_channels(filtered_frame)) {
1393                     av_log(NULL, AV_LOG_ERROR,
1394                            "Audio filter graph output is not normalized and encoder does not support parameter changes\n");
1395                     break;
1396                 }
1397                 do_audio_out(of->ctx, ost, filtered_frame);
1398                 break;
1399             default:
1400                 // TODO support subtitle filters
1401                 av_assert0(0);
1402             }
1403
1404             av_frame_unref(filtered_frame);
1405         }
1406     }
1407
1408     return 0;
1409 }
1410
1411 static void print_final_stats(int64_t total_size)
1412 {
1413     uint64_t video_size = 0, audio_size = 0, extra_size = 0, other_size = 0;
1414     uint64_t subtitle_size = 0;
1415     uint64_t data_size = 0;
1416     float percent = -1.0;
1417     int i, j;
1418     int pass1_used = 1;
1419
1420     for (i = 0; i < nb_output_streams; i++) {
1421         OutputStream *ost = output_streams[i];
1422         switch (ost->enc_ctx->codec_type) {
1423             case AVMEDIA_TYPE_VIDEO: video_size += ost->data_size; break;
1424             case AVMEDIA_TYPE_AUDIO: audio_size += ost->data_size; break;
1425             case AVMEDIA_TYPE_SUBTITLE: subtitle_size += ost->data_size; break;
1426             default:                 other_size += ost->data_size; break;
1427         }
1428         extra_size += ost->enc_ctx->extradata_size;
1429         data_size  += ost->data_size;
1430         if (   (ost->enc_ctx->flags & (AV_CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))
1431             != AV_CODEC_FLAG_PASS1)
1432             pass1_used = 0;
1433     }
1434
1435     if (data_size && total_size>0 && total_size >= data_size)
1436         percent = 100.0 * (total_size - data_size) / data_size;
1437
1438     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: ",
1439            video_size / 1024.0,
1440            audio_size / 1024.0,
1441            subtitle_size / 1024.0,
1442            other_size / 1024.0,
1443            extra_size / 1024.0);
1444     if (percent >= 0.0)
1445         av_log(NULL, AV_LOG_INFO, "%f%%", percent);
1446     else
1447         av_log(NULL, AV_LOG_INFO, "unknown");
1448     av_log(NULL, AV_LOG_INFO, "\n");
1449
1450     /* print verbose per-stream stats */
1451     for (i = 0; i < nb_input_files; i++) {
1452         InputFile *f = input_files[i];
1453         uint64_t total_packets = 0, total_size = 0;
1454
1455         av_log(NULL, AV_LOG_VERBOSE, "Input file #%d (%s):\n",
1456                i, f->ctx->filename);
1457
1458         for (j = 0; j < f->nb_streams; j++) {
1459             InputStream *ist = input_streams[f->ist_index + j];
1460             enum AVMediaType type = ist->dec_ctx->codec_type;
1461
1462             total_size    += ist->data_size;
1463             total_packets += ist->nb_packets;
1464
1465             av_log(NULL, AV_LOG_VERBOSE, "  Input stream #%d:%d (%s): ",
1466                    i, j, media_type_string(type));
1467             av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" packets read (%"PRIu64" bytes); ",
1468                    ist->nb_packets, ist->data_size);
1469
1470             if (ist->decoding_needed) {
1471                 av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" frames decoded",
1472                        ist->frames_decoded);
1473                 if (type == AVMEDIA_TYPE_AUDIO)
1474                     av_log(NULL, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ist->samples_decoded);
1475                 av_log(NULL, AV_LOG_VERBOSE, "; ");
1476             }
1477
1478             av_log(NULL, AV_LOG_VERBOSE, "\n");
1479         }
1480
1481         av_log(NULL, AV_LOG_VERBOSE, "  Total: %"PRIu64" packets (%"PRIu64" bytes) demuxed\n",
1482                total_packets, total_size);
1483     }
1484
1485     for (i = 0; i < nb_output_files; i++) {
1486         OutputFile *of = output_files[i];
1487         uint64_t total_packets = 0, total_size = 0;
1488
1489         av_log(NULL, AV_LOG_VERBOSE, "Output file #%d (%s):\n",
1490                i, of->ctx->filename);
1491
1492         for (j = 0; j < of->ctx->nb_streams; j++) {
1493             OutputStream *ost = output_streams[of->ost_index + j];
1494             enum AVMediaType type = ost->enc_ctx->codec_type;
1495
1496             total_size    += ost->data_size;
1497             total_packets += ost->packets_written;
1498
1499             av_log(NULL, AV_LOG_VERBOSE, "  Output stream #%d:%d (%s): ",
1500                    i, j, media_type_string(type));
1501             if (ost->encoding_needed) {
1502                 av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" frames encoded",
1503                        ost->frames_encoded);
1504                 if (type == AVMEDIA_TYPE_AUDIO)
1505                     av_log(NULL, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ost->samples_encoded);
1506                 av_log(NULL, AV_LOG_VERBOSE, "; ");
1507             }
1508
1509             av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" packets muxed (%"PRIu64" bytes); ",
1510                    ost->packets_written, ost->data_size);
1511
1512             av_log(NULL, AV_LOG_VERBOSE, "\n");
1513         }
1514
1515         av_log(NULL, AV_LOG_VERBOSE, "  Total: %"PRIu64" packets (%"PRIu64" bytes) muxed\n",
1516                total_packets, total_size);
1517     }
1518     if(video_size + data_size + audio_size + subtitle_size + extra_size == 0){
1519         av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded ");
1520         if (pass1_used) {
1521             av_log(NULL, AV_LOG_WARNING, "\n");
1522         } else {
1523             av_log(NULL, AV_LOG_WARNING, "(check -ss / -t / -frames parameters if used)\n");
1524         }
1525     }
1526 }
1527
1528 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
1529 {
1530     char buf[1024];
1531     AVBPrint buf_script;
1532     OutputStream *ost;
1533     AVFormatContext *oc;
1534     int64_t total_size;
1535     AVCodecContext *enc;
1536     int frame_number, vid, i;
1537     double bitrate;
1538     int64_t pts = INT64_MIN;
1539     static int64_t last_time = -1;
1540     static int qp_histogram[52];
1541     int hours, mins, secs, us;
1542
1543     if (!print_stats && !is_last_report && !progress_avio)
1544         return;
1545
1546     if (!is_last_report) {
1547         if (last_time == -1) {
1548             last_time = cur_time;
1549             return;
1550         }
1551         if ((cur_time - last_time) < 500000)
1552             return;
1553         last_time = cur_time;
1554     }
1555
1556
1557     oc = output_files[0]->ctx;
1558
1559     total_size = avio_size(oc->pb);
1560     if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
1561         total_size = avio_tell(oc->pb);
1562
1563     buf[0] = '\0';
1564     vid = 0;
1565     av_bprint_init(&buf_script, 0, 1);
1566     for (i = 0; i < nb_output_streams; i++) {
1567         float q = -1;
1568         ost = output_streams[i];
1569         enc = ost->enc_ctx;
1570         if (!ost->stream_copy)
1571             q = ost->quality / (float) FF_QP2LAMBDA;
1572
1573         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1574             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1575             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1576                        ost->file_index, ost->index, q);
1577         }
1578         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1579             float fps, t = (cur_time-timer_start) / 1000000.0;
1580
1581             frame_number = ost->frame_number;
1582             fps = t > 1 ? frame_number / t : 0;
1583             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
1584                      frame_number, fps < 9.95, fps, q);
1585             av_bprintf(&buf_script, "frame=%d\n", frame_number);
1586             av_bprintf(&buf_script, "fps=%.1f\n", fps);
1587             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1588                        ost->file_index, ost->index, q);
1589             if (is_last_report)
1590                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1591             if (qp_hist) {
1592                 int j;
1593                 int qp = lrintf(q);
1594                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1595                     qp_histogram[qp]++;
1596                 for (j = 0; j < 32; j++)
1597                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
1598             }
1599
1600             if ((enc->flags & AV_CODEC_FLAG_PSNR) && (ost->pict_type != AV_PICTURE_TYPE_NONE || is_last_report)) {
1601                 int j;
1602                 double error, error_sum = 0;
1603                 double scale, scale_sum = 0;
1604                 double p;
1605                 char type[3] = { 'Y','U','V' };
1606                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1607                 for (j = 0; j < 3; j++) {
1608                     if (is_last_report) {
1609                         error = enc->error[j];
1610                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1611                     } else {
1612                         error = ost->error[j];
1613                         scale = enc->width * enc->height * 255.0 * 255.0;
1614                     }
1615                     if (j)
1616                         scale /= 4;
1617                     error_sum += error;
1618                     scale_sum += scale;
1619                     p = psnr(error / scale);
1620                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], p);
1621                     av_bprintf(&buf_script, "stream_%d_%d_psnr_%c=%2.2f\n",
1622                                ost->file_index, ost->index, type[j] | 32, p);
1623                 }
1624                 p = psnr(error_sum / scale_sum);
1625                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1626                 av_bprintf(&buf_script, "stream_%d_%d_psnr_all=%2.2f\n",
1627                            ost->file_index, ost->index, p);
1628             }
1629             vid = 1;
1630         }
1631         /* compute min output value */
1632         if (av_stream_get_end_pts(ost->st) != AV_NOPTS_VALUE)
1633             pts = FFMAX(pts, av_rescale_q(av_stream_get_end_pts(ost->st),
1634                                           ost->st->time_base, AV_TIME_BASE_Q));
1635         if (is_last_report)
1636             nb_frames_drop += ost->last_droped;
1637     }
1638
1639     secs = FFABS(pts) / AV_TIME_BASE;
1640     us = FFABS(pts) % AV_TIME_BASE;
1641     mins = secs / 60;
1642     secs %= 60;
1643     hours = mins / 60;
1644     mins %= 60;
1645
1646     bitrate = pts && total_size >= 0 ? total_size * 8 / (pts / 1000.0) : -1;
1647
1648     if (total_size < 0) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1649                                  "size=N/A time=");
1650     else                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1651                                  "size=%8.0fkB time=", total_size / 1024.0);
1652     if (pts < 0)
1653         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "-");
1654     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1655              "%02d:%02d:%02d.%02d ", hours, mins, secs,
1656              (100 * us) / AV_TIME_BASE);
1657
1658     if (bitrate < 0) {
1659         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),"bitrate=N/A");
1660         av_bprintf(&buf_script, "bitrate=N/A\n");
1661     }else{
1662         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),"bitrate=%6.1fkbits/s", bitrate);
1663         av_bprintf(&buf_script, "bitrate=%6.1fkbits/s\n", bitrate);
1664     }
1665
1666     if (total_size < 0) av_bprintf(&buf_script, "total_size=N/A\n");
1667     else                av_bprintf(&buf_script, "total_size=%"PRId64"\n", total_size);
1668     av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
1669     av_bprintf(&buf_script, "out_time=%02d:%02d:%02d.%06d\n",
1670                hours, mins, secs, us);
1671
1672     if (nb_frames_dup || nb_frames_drop)
1673         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1674                 nb_frames_dup, nb_frames_drop);
1675     av_bprintf(&buf_script, "dup_frames=%d\n", nb_frames_dup);
1676     av_bprintf(&buf_script, "drop_frames=%d\n", nb_frames_drop);
1677
1678     if (print_stats || is_last_report) {
1679         const char end = is_last_report ? '\n' : '\r';
1680         if (print_stats==1 && AV_LOG_INFO > av_log_get_level()) {
1681             fprintf(stderr, "%s    %c", buf, end);
1682         } else
1683             av_log(NULL, AV_LOG_INFO, "%s    %c", buf, end);
1684
1685     fflush(stderr);
1686     }
1687
1688     if (progress_avio) {
1689         av_bprintf(&buf_script, "progress=%s\n",
1690                    is_last_report ? "end" : "continue");
1691         avio_write(progress_avio, buf_script.str,
1692                    FFMIN(buf_script.len, buf_script.size - 1));
1693         avio_flush(progress_avio);
1694         av_bprint_finalize(&buf_script, NULL);
1695         if (is_last_report) {
1696             avio_closep(&progress_avio);
1697         }
1698     }
1699
1700     if (is_last_report)
1701         print_final_stats(total_size);
1702 }
1703
1704 static void flush_encoders(void)
1705 {
1706     int i, ret;
1707
1708     for (i = 0; i < nb_output_streams; i++) {
1709         OutputStream   *ost = output_streams[i];
1710         AVCodecContext *enc = ost->enc_ctx;
1711         AVFormatContext *os = output_files[ost->file_index]->ctx;
1712         int stop_encoding = 0;
1713
1714         if (!ost->encoding_needed)
1715             continue;
1716
1717         if (enc->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1718             continue;
1719         if (enc->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
1720             continue;
1721
1722         for (;;) {
1723             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1724             const char *desc;
1725
1726             switch (enc->codec_type) {
1727             case AVMEDIA_TYPE_AUDIO:
1728                 encode = avcodec_encode_audio2;
1729                 desc   = "Audio";
1730                 break;
1731             case AVMEDIA_TYPE_VIDEO:
1732                 encode = avcodec_encode_video2;
1733                 desc   = "Video";
1734                 break;
1735             default:
1736                 stop_encoding = 1;
1737             }
1738
1739             if (encode) {
1740                 AVPacket pkt;
1741                 int pkt_size;
1742                 int got_packet;
1743                 av_init_packet(&pkt);
1744                 pkt.data = NULL;
1745                 pkt.size = 0;
1746
1747                 update_benchmark(NULL);
1748                 ret = encode(enc, &pkt, NULL, &got_packet);
1749                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
1750                 if (ret < 0) {
1751                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed: %s\n",
1752                            desc,
1753                            av_err2str(ret));
1754                     exit_program(1);
1755                 }
1756                 if (ost->logfile && enc->stats_out) {
1757                     fprintf(ost->logfile, "%s", enc->stats_out);
1758                 }
1759                 if (!got_packet) {
1760                     stop_encoding = 1;
1761                     break;
1762                 }
1763                 if (ost->finished & MUXER_FINISHED) {
1764                     av_free_packet(&pkt);
1765                     continue;
1766                 }
1767                 av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
1768                 pkt_size = pkt.size;
1769                 write_frame(os, &pkt, ost);
1770                 if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO && vstats_filename) {
1771                     do_video_stats(ost, pkt_size);
1772                 }
1773             }
1774
1775             if (stop_encoding)
1776                 break;
1777         }
1778     }
1779 }
1780
1781 /*
1782  * Check whether a packet from ist should be written into ost at this time
1783  */
1784 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1785 {
1786     OutputFile *of = output_files[ost->file_index];
1787     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1788
1789     if (ost->source_index != ist_index)
1790         return 0;
1791
1792     if (ost->finished)
1793         return 0;
1794
1795     if (of->start_time != AV_NOPTS_VALUE && ist->pts < of->start_time)
1796         return 0;
1797
1798     return 1;
1799 }
1800
1801 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1802 {
1803     OutputFile *of = output_files[ost->file_index];
1804     InputFile   *f = input_files [ist->file_index];
1805     int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1806     int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);
1807     int64_t ist_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ist->st->time_base);
1808     AVPicture pict;
1809     AVPacket opkt;
1810
1811     av_init_packet(&opkt);
1812
1813     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1814         !ost->copy_initial_nonkeyframes)
1815         return;
1816
1817     if (pkt->pts == AV_NOPTS_VALUE) {
1818         if (!ost->frame_number && ist->pts < start_time &&
1819             !ost->copy_prior_start)
1820             return;
1821     } else {
1822         if (!ost->frame_number && pkt->pts < ist_tb_start_time &&
1823             !ost->copy_prior_start)
1824             return;
1825     }
1826
1827     if (of->recording_time != INT64_MAX &&
1828         ist->pts >= of->recording_time + start_time) {
1829         close_output_stream(ost);
1830         return;
1831     }
1832
1833     if (f->recording_time != INT64_MAX) {
1834         start_time = f->ctx->start_time;
1835         if (f->start_time != AV_NOPTS_VALUE)
1836             start_time += f->start_time;
1837         if (ist->pts >= f->recording_time + start_time) {
1838             close_output_stream(ost);
1839             return;
1840         }
1841     }
1842
1843     /* force the input stream PTS */
1844     if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO)
1845         ost->sync_opts++;
1846
1847     if (pkt->pts != AV_NOPTS_VALUE)
1848         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1849     else
1850         opkt.pts = AV_NOPTS_VALUE;
1851
1852     if (pkt->dts == AV_NOPTS_VALUE)
1853         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
1854     else
1855         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1856     opkt.dts -= ost_tb_start_time;
1857
1858     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1859         int duration = av_get_audio_frame_duration(ist->dec_ctx, pkt->size);
1860         if(!duration)
1861             duration = ist->dec_ctx->frame_size;
1862         opkt.dts = opkt.pts = av_rescale_delta(ist->st->time_base, pkt->dts,
1863                                                (AVRational){1, ist->dec_ctx->sample_rate}, duration, &ist->filter_in_rescale_delta_last,
1864                                                ost->st->time_base) - ost_tb_start_time;
1865     }
1866
1867     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1868     opkt.flags    = pkt->flags;
1869     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1870     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1871        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1872        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1873        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1874        ) {
1875         int ret = av_parser_change(ost->parser, ost->st->codec,
1876                              &opkt.data, &opkt.size,
1877                              pkt->data, pkt->size,
1878                              pkt->flags & AV_PKT_FLAG_KEY);
1879         if (ret < 0) {
1880             av_log(NULL, AV_LOG_FATAL, "av_parser_change failed: %s\n",
1881                    av_err2str(ret));
1882             exit_program(1);
1883         }
1884         if (ret) {
1885             opkt.buf = av_buffer_create(opkt.data, opkt.size, av_buffer_default_free, NULL, 0);
1886             if (!opkt.buf)
1887                 exit_program(1);
1888         }
1889     } else {
1890         opkt.data = pkt->data;
1891         opkt.size = pkt->size;
1892     }
1893     av_copy_packet_side_data(&opkt, pkt);
1894
1895     if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1896         ost->st->codec->codec_id == AV_CODEC_ID_RAWVIDEO &&
1897         (of->ctx->oformat->flags & AVFMT_RAWPICTURE)) {
1898         /* store AVPicture in AVPacket, as expected by the output format */
1899         int ret = avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
1900         if (ret < 0) {
1901             av_log(NULL, AV_LOG_FATAL, "avpicture_fill failed: %s\n",
1902                    av_err2str(ret));
1903             exit_program(1);
1904         }
1905         opkt.data = (uint8_t *)&pict;
1906         opkt.size = sizeof(AVPicture);
1907         opkt.flags |= AV_PKT_FLAG_KEY;
1908     }
1909
1910     write_frame(of->ctx, &opkt, ost);
1911 }
1912
1913 int guess_input_channel_layout(InputStream *ist)
1914 {
1915     AVCodecContext *dec = ist->dec_ctx;
1916
1917     if (!dec->channel_layout) {
1918         char layout_name[256];
1919
1920         if (dec->channels > ist->guess_layout_max)
1921             return 0;
1922         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1923         if (!dec->channel_layout)
1924             return 0;
1925         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1926                                      dec->channels, dec->channel_layout);
1927         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1928                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1929     }
1930     return 1;
1931 }
1932
1933 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1934 {
1935     AVFrame *decoded_frame, *f;
1936     AVCodecContext *avctx = ist->dec_ctx;
1937     int i, ret, err = 0, resample_changed;
1938     AVRational decoded_frame_tb;
1939
1940     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1941         return AVERROR(ENOMEM);
1942     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1943         return AVERROR(ENOMEM);
1944     decoded_frame = ist->decoded_frame;
1945
1946     update_benchmark(NULL);
1947     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1948     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
1949
1950     if (ret >= 0 && avctx->sample_rate <= 0) {
1951         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
1952         ret = AVERROR_INVALIDDATA;
1953     }
1954
1955     if (*got_output || ret<0)
1956         decode_error_stat[ret<0] ++;
1957
1958     if (ret < 0 && exit_on_error)
1959         exit_program(1);
1960
1961     if (!*got_output || ret < 0)
1962         return ret;
1963
1964     ist->samples_decoded += decoded_frame->nb_samples;
1965     ist->frames_decoded++;
1966
1967 #if 1
1968     /* increment next_dts to use for the case where the input stream does not
1969        have timestamps or there are multiple frames in the packet */
1970     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1971                      avctx->sample_rate;
1972     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1973                      avctx->sample_rate;
1974 #endif
1975
1976     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1977                        ist->resample_channels       != avctx->channels               ||
1978                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1979                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1980     if (resample_changed) {
1981         char layout1[64], layout2[64];
1982
1983         if (!guess_input_channel_layout(ist)) {
1984             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1985                    "layout for Input Stream #%d.%d\n", ist->file_index,
1986                    ist->st->index);
1987             exit_program(1);
1988         }
1989         decoded_frame->channel_layout = avctx->channel_layout;
1990
1991         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1992                                      ist->resample_channel_layout);
1993         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1994                                      decoded_frame->channel_layout);
1995
1996         av_log(NULL, AV_LOG_INFO,
1997                "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",
1998                ist->file_index, ist->st->index,
1999                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2000                ist->resample_channels, layout1,
2001                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2002                avctx->channels, layout2);
2003
2004         ist->resample_sample_fmt     = decoded_frame->format;
2005         ist->resample_sample_rate    = decoded_frame->sample_rate;
2006         ist->resample_channel_layout = decoded_frame->channel_layout;
2007         ist->resample_channels       = avctx->channels;
2008
2009         for (i = 0; i < nb_filtergraphs; i++)
2010             if (ist_in_filtergraph(filtergraphs[i], ist)) {
2011                 FilterGraph *fg = filtergraphs[i];
2012                 if (configure_filtergraph(fg) < 0) {
2013                     av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2014                     exit_program(1);
2015                 }
2016             }
2017     }
2018
2019     /* if the decoder provides a pts, use it instead of the last packet pts.
2020        the decoder could be delaying output by a packet or more. */
2021     if (decoded_frame->pts != AV_NOPTS_VALUE) {
2022         ist->dts = ist->next_dts = ist->pts = ist->next_pts = av_rescale_q(decoded_frame->pts, avctx->time_base, AV_TIME_BASE_Q);
2023         decoded_frame_tb   = avctx->time_base;
2024     } else if (decoded_frame->pkt_pts != AV_NOPTS_VALUE) {
2025         decoded_frame->pts = decoded_frame->pkt_pts;
2026         decoded_frame_tb   = ist->st->time_base;
2027     } else if (pkt->pts != AV_NOPTS_VALUE) {
2028         decoded_frame->pts = pkt->pts;
2029         decoded_frame_tb   = ist->st->time_base;
2030     }else {
2031         decoded_frame->pts = ist->dts;
2032         decoded_frame_tb   = AV_TIME_BASE_Q;
2033     }
2034     pkt->pts           = AV_NOPTS_VALUE;
2035     if (decoded_frame->pts != AV_NOPTS_VALUE)
2036         decoded_frame->pts = av_rescale_delta(decoded_frame_tb, decoded_frame->pts,
2037                                               (AVRational){1, avctx->sample_rate}, decoded_frame->nb_samples, &ist->filter_in_rescale_delta_last,
2038                                               (AVRational){1, avctx->sample_rate});
2039     for (i = 0; i < ist->nb_filters; i++) {
2040         if (i < ist->nb_filters - 1) {
2041             f = ist->filter_frame;
2042             err = av_frame_ref(f, decoded_frame);
2043             if (err < 0)
2044                 break;
2045         } else
2046             f = decoded_frame;
2047         err = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f,
2048                                      AV_BUFFERSRC_FLAG_PUSH);
2049         if (err == AVERROR_EOF)
2050             err = 0; /* ignore */
2051         if (err < 0)
2052             break;
2053     }
2054     decoded_frame->pts = AV_NOPTS_VALUE;
2055
2056     av_frame_unref(ist->filter_frame);
2057     av_frame_unref(decoded_frame);
2058     return err < 0 ? err : ret;
2059 }
2060
2061 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
2062 {
2063     AVFrame *decoded_frame, *f;
2064     int i, ret = 0, err = 0, resample_changed;
2065     int64_t best_effort_timestamp;
2066     AVRational *frame_sample_aspect;
2067
2068     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
2069         return AVERROR(ENOMEM);
2070     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
2071         return AVERROR(ENOMEM);
2072     decoded_frame = ist->decoded_frame;
2073     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
2074
2075     update_benchmark(NULL);
2076     ret = avcodec_decode_video2(ist->dec_ctx,
2077                                 decoded_frame, got_output, pkt);
2078     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
2079
2080     // The following line may be required in some cases where there is no parser
2081     // or the parser does not has_b_frames correctly
2082     if (ist->st->codec->has_b_frames < ist->dec_ctx->has_b_frames) {
2083         if (ist->dec_ctx->codec_id == AV_CODEC_ID_H264) {
2084             ist->st->codec->has_b_frames = ist->dec_ctx->has_b_frames;
2085         } else
2086             av_log(ist->dec_ctx, AV_LOG_WARNING,
2087                    "has_b_frames is larger in decoder than demuxer %d > %d.\n"
2088                    "If you want to help, upload a sample "
2089                    "of this file to ftp://upload.ffmpeg.org/incoming/ "
2090                    "and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)",
2091                    ist->dec_ctx->has_b_frames,
2092                    ist->st->codec->has_b_frames);
2093     }
2094
2095     if (*got_output || ret<0)
2096         decode_error_stat[ret<0] ++;
2097
2098     if (ret < 0 && exit_on_error)
2099         exit_program(1);
2100
2101     if (*got_output && ret >= 0) {
2102         if (ist->dec_ctx->width  != decoded_frame->width ||
2103             ist->dec_ctx->height != decoded_frame->height ||
2104             ist->dec_ctx->pix_fmt != decoded_frame->format) {
2105             av_log(NULL, AV_LOG_DEBUG, "Frame parameters mismatch context %d,%d,%d != %d,%d,%d\n",
2106                 decoded_frame->width,
2107                 decoded_frame->height,
2108                 decoded_frame->format,
2109                 ist->dec_ctx->width,
2110                 ist->dec_ctx->height,
2111                 ist->dec_ctx->pix_fmt);
2112         }
2113     }
2114
2115     if (!*got_output || ret < 0)
2116         return ret;
2117
2118     if(ist->top_field_first>=0)
2119         decoded_frame->top_field_first = ist->top_field_first;
2120
2121     ist->frames_decoded++;
2122
2123     if (ist->hwaccel_retrieve_data && decoded_frame->format == ist->hwaccel_pix_fmt) {
2124         err = ist->hwaccel_retrieve_data(ist->dec_ctx, decoded_frame);
2125         if (err < 0)
2126             goto fail;
2127     }
2128     ist->hwaccel_retrieved_pix_fmt = decoded_frame->format;
2129
2130     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
2131     if(best_effort_timestamp != AV_NOPTS_VALUE)
2132         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
2133
2134     if (debug_ts) {
2135         av_log(NULL, AV_LOG_INFO, "decoder -> ist_index:%d type:video "
2136                "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",
2137                ist->st->index, av_ts2str(decoded_frame->pts),
2138                av_ts2timestr(decoded_frame->pts, &ist->st->time_base),
2139                best_effort_timestamp,
2140                av_ts2timestr(best_effort_timestamp, &ist->st->time_base),
2141                decoded_frame->key_frame, decoded_frame->pict_type,
2142                ist->st->time_base.num, ist->st->time_base.den);
2143     }
2144
2145     pkt->size = 0;
2146
2147     if (ist->st->sample_aspect_ratio.num)
2148         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2149
2150     resample_changed = ist->resample_width   != decoded_frame->width  ||
2151                        ist->resample_height  != decoded_frame->height ||
2152                        ist->resample_pix_fmt != decoded_frame->format;
2153     if (resample_changed) {
2154         av_log(NULL, AV_LOG_INFO,
2155                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2156                ist->file_index, ist->st->index,
2157                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2158                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2159
2160         ist->resample_width   = decoded_frame->width;
2161         ist->resample_height  = decoded_frame->height;
2162         ist->resample_pix_fmt = decoded_frame->format;
2163
2164         for (i = 0; i < nb_filtergraphs; i++) {
2165             if (ist_in_filtergraph(filtergraphs[i], ist) && ist->reinit_filters &&
2166                 configure_filtergraph(filtergraphs[i]) < 0) {
2167                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2168                 exit_program(1);
2169             }
2170         }
2171     }
2172
2173     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2174     for (i = 0; i < ist->nb_filters; i++) {
2175         if (!frame_sample_aspect->num)
2176             *frame_sample_aspect = ist->st->sample_aspect_ratio;
2177
2178         if (i < ist->nb_filters - 1) {
2179             f = ist->filter_frame;
2180             err = av_frame_ref(f, decoded_frame);
2181             if (err < 0)
2182                 break;
2183         } else
2184             f = decoded_frame;
2185         ret = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f, AV_BUFFERSRC_FLAG_PUSH);
2186         if (ret == AVERROR_EOF) {
2187             ret = 0; /* ignore */
2188         } else if (ret < 0) {
2189             av_log(NULL, AV_LOG_FATAL,
2190                    "Failed to inject frame into filter network: %s\n", av_err2str(ret));
2191             exit_program(1);
2192         }
2193     }
2194
2195 fail:
2196     av_frame_unref(ist->filter_frame);
2197     av_frame_unref(decoded_frame);
2198     return err < 0 ? err : ret;
2199 }
2200
2201 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2202 {
2203     AVSubtitle subtitle;
2204     int i, ret = avcodec_decode_subtitle2(ist->dec_ctx,
2205                                           &subtitle, got_output, pkt);
2206
2207     if (*got_output || ret<0)
2208         decode_error_stat[ret<0] ++;
2209
2210     if (ret < 0 && exit_on_error)
2211         exit_program(1);
2212
2213     if (ret < 0 || !*got_output) {
2214         if (!pkt->size)
2215             sub2video_flush(ist);
2216         return ret;
2217     }
2218
2219     if (ist->fix_sub_duration) {
2220         int end = 1;
2221         if (ist->prev_sub.got_output) {
2222             end = av_rescale(subtitle.pts - ist->prev_sub.subtitle.pts,
2223                              1000, AV_TIME_BASE);
2224             if (end < ist->prev_sub.subtitle.end_display_time) {
2225                 av_log(ist->dec_ctx, AV_LOG_DEBUG,
2226                        "Subtitle duration reduced from %d to %d%s\n",
2227                        ist->prev_sub.subtitle.end_display_time, end,
2228                        end <= 0 ? ", dropping it" : "");
2229                 ist->prev_sub.subtitle.end_display_time = end;
2230             }
2231         }
2232         FFSWAP(int,        *got_output, ist->prev_sub.got_output);
2233         FFSWAP(int,        ret,         ist->prev_sub.ret);
2234         FFSWAP(AVSubtitle, subtitle,    ist->prev_sub.subtitle);
2235         if (end <= 0)
2236             goto out;
2237     }
2238
2239     if (!*got_output)
2240         return ret;
2241
2242     sub2video_update(ist, &subtitle);
2243
2244     if (!subtitle.num_rects)
2245         goto out;
2246
2247     ist->frames_decoded++;
2248
2249     for (i = 0; i < nb_output_streams; i++) {
2250         OutputStream *ost = output_streams[i];
2251
2252         if (!check_output_constraints(ist, ost) || !ost->encoding_needed
2253             || ost->enc->type != AVMEDIA_TYPE_SUBTITLE)
2254             continue;
2255
2256         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle);
2257     }
2258
2259 out:
2260     avsubtitle_free(&subtitle);
2261     return ret;
2262 }
2263
2264 static int send_filter_eof(InputStream *ist)
2265 {
2266     int i, ret;
2267     for (i = 0; i < ist->nb_filters; i++) {
2268         ret = av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
2269         if (ret < 0)
2270             return ret;
2271     }
2272     return 0;
2273 }
2274
2275 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2276 static int process_input_packet(InputStream *ist, const AVPacket *pkt)
2277 {
2278     int ret = 0, i;
2279     int got_output = 0;
2280
2281     AVPacket avpkt;
2282     if (!ist->saw_first_ts) {
2283         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;
2284         ist->pts = 0;
2285         if (pkt && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
2286             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2287             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
2288         }
2289         ist->saw_first_ts = 1;
2290     }
2291
2292     if (ist->next_dts == AV_NOPTS_VALUE)
2293         ist->next_dts = ist->dts;
2294     if (ist->next_pts == AV_NOPTS_VALUE)
2295         ist->next_pts = ist->pts;
2296
2297     if (!pkt) {
2298         /* EOF handling */
2299         av_init_packet(&avpkt);
2300         avpkt.data = NULL;
2301         avpkt.size = 0;
2302         goto handle_eof;
2303     } else {
2304         avpkt = *pkt;
2305     }
2306
2307     if (pkt->dts != AV_NOPTS_VALUE) {
2308         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2309         if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2310             ist->next_pts = ist->pts = ist->dts;
2311     }
2312
2313     // while we have more to decode or while the decoder did output something on EOF
2314     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2315         int duration;
2316     handle_eof:
2317
2318         ist->pts = ist->next_pts;
2319         ist->dts = ist->next_dts;
2320
2321         if (avpkt.size && avpkt.size != pkt->size &&
2322             !(ist->dec->capabilities & AV_CODEC_CAP_SUBFRAMES)) {
2323             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2324                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2325             ist->showed_multi_packet_warning = 1;
2326         }
2327
2328         switch (ist->dec_ctx->codec_type) {
2329         case AVMEDIA_TYPE_AUDIO:
2330             ret = decode_audio    (ist, &avpkt, &got_output);
2331             break;
2332         case AVMEDIA_TYPE_VIDEO:
2333             ret = decode_video    (ist, &avpkt, &got_output);
2334             if (avpkt.duration) {
2335                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2336             } else if(ist->dec_ctx->framerate.num != 0 && ist->dec_ctx->framerate.den != 0) {
2337                 int ticks= av_stream_get_parser(ist->st) ? av_stream_get_parser(ist->st)->repeat_pict+1 : ist->dec_ctx->ticks_per_frame;
2338                 duration = ((int64_t)AV_TIME_BASE *
2339                                 ist->dec_ctx->framerate.den * ticks) /
2340                                 ist->dec_ctx->framerate.num / ist->dec_ctx->ticks_per_frame;
2341             } else
2342                 duration = 0;
2343
2344             if(ist->dts != AV_NOPTS_VALUE && duration) {
2345                 ist->next_dts += duration;
2346             }else
2347                 ist->next_dts = AV_NOPTS_VALUE;
2348
2349             if (got_output)
2350                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
2351             break;
2352         case AVMEDIA_TYPE_SUBTITLE:
2353             ret = transcode_subtitles(ist, &avpkt, &got_output);
2354             break;
2355         default:
2356             return -1;
2357         }
2358
2359         if (ret < 0) {
2360             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d: %s\n",
2361                    ist->file_index, ist->st->index, av_err2str(ret));
2362             if (exit_on_error)
2363                 exit_program(1);
2364             break;
2365         }
2366
2367         avpkt.dts=
2368         avpkt.pts= AV_NOPTS_VALUE;
2369
2370         // touch data and size only if not EOF
2371         if (pkt) {
2372             if(ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO)
2373                 ret = avpkt.size;
2374             avpkt.data += ret;
2375             avpkt.size -= ret;
2376         }
2377         if (!got_output) {
2378             continue;
2379         }
2380         if (got_output && !pkt)
2381             break;
2382     }
2383
2384     /* after flushing, send an EOF on all the filter inputs attached to the stream */
2385     if (!pkt && ist->decoding_needed && !got_output) {
2386         int ret = send_filter_eof(ist);
2387         if (ret < 0) {
2388             av_log(NULL, AV_LOG_FATAL, "Error marking filters as finished\n");
2389             exit_program(1);
2390         }
2391     }
2392
2393     /* handle stream copy */
2394     if (!ist->decoding_needed) {
2395         ist->dts = ist->next_dts;
2396         switch (ist->dec_ctx->codec_type) {
2397         case AVMEDIA_TYPE_AUDIO:
2398             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->dec_ctx->frame_size) /
2399                              ist->dec_ctx->sample_rate;
2400             break;
2401         case AVMEDIA_TYPE_VIDEO:
2402             if (ist->framerate.num) {
2403                 // TODO: Remove work-around for c99-to-c89 issue 7
2404                 AVRational time_base_q = AV_TIME_BASE_Q;
2405                 int64_t next_dts = av_rescale_q(ist->next_dts, time_base_q, av_inv_q(ist->framerate));
2406                 ist->next_dts = av_rescale_q(next_dts + 1, av_inv_q(ist->framerate), time_base_q);
2407             } else if (pkt->duration) {
2408                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2409             } else if(ist->dec_ctx->framerate.num != 0) {
2410                 int ticks= av_stream_get_parser(ist->st) ? av_stream_get_parser(ist->st)->repeat_pict + 1 : ist->dec_ctx->ticks_per_frame;
2411                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2412                                   ist->dec_ctx->framerate.den * ticks) /
2413                                   ist->dec_ctx->framerate.num / ist->dec_ctx->ticks_per_frame;
2414             }
2415             break;
2416         }
2417         ist->pts = ist->dts;
2418         ist->next_pts = ist->next_dts;
2419     }
2420     for (i = 0; pkt && i < nb_output_streams; i++) {
2421         OutputStream *ost = output_streams[i];
2422
2423         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2424             continue;
2425
2426         do_streamcopy(ist, ost, pkt);
2427     }
2428
2429     return got_output;
2430 }
2431
2432 static void print_sdp(void)
2433 {
2434     char sdp[16384];
2435     int i;
2436     int j;
2437     AVIOContext *sdp_pb;
2438     AVFormatContext **avc = av_malloc_array(nb_output_files, sizeof(*avc));
2439
2440     if (!avc)
2441         exit_program(1);
2442     for (i = 0, j = 0; i < nb_output_files; i++) {
2443         if (!strcmp(output_files[i]->ctx->oformat->name, "rtp")) {
2444             avc[j] = output_files[i]->ctx;
2445             j++;
2446         }
2447     }
2448
2449     av_sdp_create(avc, j, sdp, sizeof(sdp));
2450
2451     if (!sdp_filename) {
2452         printf("SDP:\n%s\n", sdp);
2453         fflush(stdout);
2454     } else {
2455         if (avio_open2(&sdp_pb, sdp_filename, AVIO_FLAG_WRITE, &int_cb, NULL) < 0) {
2456             av_log(NULL, AV_LOG_ERROR, "Failed to open sdp file '%s'\n", sdp_filename);
2457         } else {
2458             avio_printf(sdp_pb, "SDP:\n%s", sdp);
2459             avio_closep(&sdp_pb);
2460             av_freep(&sdp_filename);
2461         }
2462     }
2463
2464     av_freep(&avc);
2465 }
2466
2467 static const HWAccel *get_hwaccel(enum AVPixelFormat pix_fmt)
2468 {
2469     int i;
2470     for (i = 0; hwaccels[i].name; i++)
2471         if (hwaccels[i].pix_fmt == pix_fmt)
2472             return &hwaccels[i];
2473     return NULL;
2474 }
2475
2476 static enum AVPixelFormat get_format(AVCodecContext *s, const enum AVPixelFormat *pix_fmts)
2477 {
2478     InputStream *ist = s->opaque;
2479     const enum AVPixelFormat *p;
2480     int ret;
2481
2482     for (p = pix_fmts; *p != -1; p++) {
2483         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(*p);
2484         const HWAccel *hwaccel;
2485
2486         if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
2487             break;
2488
2489         hwaccel = get_hwaccel(*p);
2490         if (!hwaccel ||
2491             (ist->active_hwaccel_id && ist->active_hwaccel_id != hwaccel->id) ||
2492             (ist->hwaccel_id != HWACCEL_AUTO && ist->hwaccel_id != hwaccel->id))
2493             continue;
2494
2495         ret = hwaccel->init(s);
2496         if (ret < 0) {
2497             if (ist->hwaccel_id == hwaccel->id) {
2498                 av_log(NULL, AV_LOG_FATAL,
2499                        "%s hwaccel requested for input stream #%d:%d, "
2500                        "but cannot be initialized.\n", hwaccel->name,
2501                        ist->file_index, ist->st->index);
2502                 return AV_PIX_FMT_NONE;
2503             }
2504             continue;
2505         }
2506         ist->active_hwaccel_id = hwaccel->id;
2507         ist->hwaccel_pix_fmt   = *p;
2508         break;
2509     }
2510
2511     return *p;
2512 }
2513
2514 static int get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
2515 {
2516     InputStream *ist = s->opaque;
2517
2518     if (ist->hwaccel_get_buffer && frame->format == ist->hwaccel_pix_fmt)
2519         return ist->hwaccel_get_buffer(s, frame, flags);
2520
2521     return avcodec_default_get_buffer2(s, frame, flags);
2522 }
2523
2524 static int init_input_stream(int ist_index, char *error, int error_len)
2525 {
2526     int ret;
2527     InputStream *ist = input_streams[ist_index];
2528
2529     if (ist->decoding_needed) {
2530         AVCodec *codec = ist->dec;
2531         if (!codec) {
2532             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2533                     avcodec_get_name(ist->dec_ctx->codec_id), ist->file_index, ist->st->index);
2534             return AVERROR(EINVAL);
2535         }
2536
2537         ist->dec_ctx->opaque                = ist;
2538         ist->dec_ctx->get_format            = get_format;
2539         ist->dec_ctx->get_buffer2           = get_buffer;
2540         ist->dec_ctx->thread_safe_callbacks = 1;
2541
2542         av_opt_set_int(ist->dec_ctx, "refcounted_frames", 1, 0);
2543         if (ist->dec_ctx->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
2544            (ist->decoding_needed & DECODING_FOR_OST)) {
2545             av_dict_set(&ist->decoder_opts, "compute_edt", "1", AV_DICT_DONT_OVERWRITE);
2546             if (ist->decoding_needed & DECODING_FOR_FILTER)
2547                 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");
2548         }
2549
2550         if (!av_dict_get(ist->decoder_opts, "threads", NULL, 0))
2551             av_dict_set(&ist->decoder_opts, "threads", "auto", 0);
2552         if ((ret = avcodec_open2(ist->dec_ctx, codec, &ist->decoder_opts)) < 0) {
2553             if (ret == AVERROR_EXPERIMENTAL)
2554                 abort_codec_experimental(codec, 0);
2555
2556             snprintf(error, error_len,
2557                      "Error while opening decoder for input stream "
2558                      "#%d:%d : %s",
2559                      ist->file_index, ist->st->index, av_err2str(ret));
2560             return ret;
2561         }
2562         assert_avoptions(ist->decoder_opts);
2563     }
2564
2565     ist->next_pts = AV_NOPTS_VALUE;
2566     ist->next_dts = AV_NOPTS_VALUE;
2567
2568     return 0;
2569 }
2570
2571 static InputStream *get_input_stream(OutputStream *ost)
2572 {
2573     if (ost->source_index >= 0)
2574         return input_streams[ost->source_index];
2575     return NULL;
2576 }
2577
2578 static int compare_int64(const void *a, const void *b)
2579 {
2580     int64_t va = *(int64_t *)a, vb = *(int64_t *)b;
2581     return va < vb ? -1 : va > vb ? +1 : 0;
2582 }
2583
2584 static int init_output_stream(OutputStream *ost, char *error, int error_len)
2585 {
2586     int ret = 0;
2587
2588     if (ost->encoding_needed) {
2589         AVCodec      *codec = ost->enc;
2590         AVCodecContext *dec = NULL;
2591         InputStream *ist;
2592
2593         if ((ist = get_input_stream(ost)))
2594             dec = ist->dec_ctx;
2595         if (dec && dec->subtitle_header) {
2596             /* ASS code assumes this buffer is null terminated so add extra byte. */
2597             ost->enc_ctx->subtitle_header = av_mallocz(dec->subtitle_header_size + 1);
2598             if (!ost->enc_ctx->subtitle_header)
2599                 return AVERROR(ENOMEM);
2600             memcpy(ost->enc_ctx->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2601             ost->enc_ctx->subtitle_header_size = dec->subtitle_header_size;
2602         }
2603         if (!av_dict_get(ost->encoder_opts, "threads", NULL, 0))
2604             av_dict_set(&ost->encoder_opts, "threads", "auto", 0);
2605         av_dict_set(&ost->encoder_opts, "side_data_only_packets", "1", 0);
2606         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2607             !codec->defaults &&
2608             !av_dict_get(ost->encoder_opts, "b", NULL, 0) &&
2609             !av_dict_get(ost->encoder_opts, "ab", NULL, 0))
2610             av_dict_set(&ost->encoder_opts, "b", "128000", 0);
2611
2612         if ((ret = avcodec_open2(ost->enc_ctx, codec, &ost->encoder_opts)) < 0) {
2613             if (ret == AVERROR_EXPERIMENTAL)
2614                 abort_codec_experimental(codec, 1);
2615             snprintf(error, error_len,
2616                      "Error while opening encoder for output stream #%d:%d - "
2617                      "maybe incorrect parameters such as bit_rate, rate, width or height",
2618                     ost->file_index, ost->index);
2619             return ret;
2620         }
2621         if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2622             !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
2623             av_buffersink_set_frame_size(ost->filter->filter,
2624                                             ost->enc_ctx->frame_size);
2625         assert_avoptions(ost->encoder_opts);
2626         if (ost->enc_ctx->bit_rate && ost->enc_ctx->bit_rate < 1000)
2627             av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2628                                          " It takes bits/s as argument, not kbits/s\n");
2629
2630         ret = avcodec_copy_context(ost->st->codec, ost->enc_ctx);
2631         if (ret < 0) {
2632             av_log(NULL, AV_LOG_FATAL,
2633                    "Error initializing the output stream codec context.\n");
2634             exit_program(1);
2635         }
2636
2637         // copy timebase while removing common factors
2638         ost->st->time_base = av_add_q(ost->enc_ctx->time_base, (AVRational){0, 1});
2639         ost->st->codec->codec= ost->enc_ctx->codec;
2640     } else {
2641         ret = av_opt_set_dict(ost->enc_ctx, &ost->encoder_opts);
2642         if (ret < 0) {
2643            av_log(NULL, AV_LOG_FATAL,
2644                   "Error setting up codec context options.\n");
2645            return ret;
2646         }
2647         // copy timebase while removing common factors
2648         ost->st->time_base = av_add_q(ost->st->codec->time_base, (AVRational){0, 1});
2649     }
2650
2651     return ret;
2652 }
2653
2654 static void parse_forced_key_frames(char *kf, OutputStream *ost,
2655                                     AVCodecContext *avctx)
2656 {
2657     char *p;
2658     int n = 1, i, size, index = 0;
2659     int64_t t, *pts;
2660
2661     for (p = kf; *p; p++)
2662         if (*p == ',')
2663             n++;
2664     size = n;
2665     pts = av_malloc_array(size, sizeof(*pts));
2666     if (!pts) {
2667         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
2668         exit_program(1);
2669     }
2670
2671     p = kf;
2672     for (i = 0; i < n; i++) {
2673         char *next = strchr(p, ',');
2674
2675         if (next)
2676             *next++ = 0;
2677
2678         if (!memcmp(p, "chapters", 8)) {
2679
2680             AVFormatContext *avf = output_files[ost->file_index]->ctx;
2681             int j;
2682
2683             if (avf->nb_chapters > INT_MAX - size ||
2684                 !(pts = av_realloc_f(pts, size += avf->nb_chapters - 1,
2685                                      sizeof(*pts)))) {
2686                 av_log(NULL, AV_LOG_FATAL,
2687                        "Could not allocate forced key frames array.\n");
2688                 exit_program(1);
2689             }
2690             t = p[8] ? parse_time_or_die("force_key_frames", p + 8, 1) : 0;
2691             t = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2692
2693             for (j = 0; j < avf->nb_chapters; j++) {
2694                 AVChapter *c = avf->chapters[j];
2695                 av_assert1(index < size);
2696                 pts[index++] = av_rescale_q(c->start, c->time_base,
2697                                             avctx->time_base) + t;
2698             }
2699
2700         } else {
2701
2702             t = parse_time_or_die("force_key_frames", p, 1);
2703             av_assert1(index < size);
2704             pts[index++] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2705
2706         }
2707
2708         p = next;
2709     }
2710
2711     av_assert0(index == size);
2712     qsort(pts, size, sizeof(*pts), compare_int64);
2713     ost->forced_kf_count = size;
2714     ost->forced_kf_pts   = pts;
2715 }
2716
2717 static void report_new_stream(int input_index, AVPacket *pkt)
2718 {
2719     InputFile *file = input_files[input_index];
2720     AVStream *st = file->ctx->streams[pkt->stream_index];
2721
2722     if (pkt->stream_index < file->nb_streams_warn)
2723         return;
2724     av_log(file->ctx, AV_LOG_WARNING,
2725            "New %s stream %d:%d at pos:%"PRId64" and DTS:%ss\n",
2726            av_get_media_type_string(st->codec->codec_type),
2727            input_index, pkt->stream_index,
2728            pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
2729     file->nb_streams_warn = pkt->stream_index + 1;
2730 }
2731
2732 static void set_encoder_id(OutputFile *of, OutputStream *ost)
2733 {
2734     AVDictionaryEntry *e;
2735
2736     uint8_t *encoder_string;
2737     int encoder_string_len;
2738     int format_flags = 0;
2739     int codec_flags = 0;
2740
2741     if (av_dict_get(ost->st->metadata, "encoder",  NULL, 0))
2742         return;
2743
2744     e = av_dict_get(of->opts, "fflags", NULL, 0);
2745     if (e) {
2746         const AVOption *o = av_opt_find(of->ctx, "fflags", NULL, 0, 0);
2747         if (!o)
2748             return;
2749         av_opt_eval_flags(of->ctx, o, e->value, &format_flags);
2750     }
2751     e = av_dict_get(ost->encoder_opts, "flags", NULL, 0);
2752     if (e) {
2753         const AVOption *o = av_opt_find(ost->enc_ctx, "flags", NULL, 0, 0);
2754         if (!o)
2755             return;
2756         av_opt_eval_flags(ost->enc_ctx, o, e->value, &codec_flags);
2757     }
2758
2759     encoder_string_len = sizeof(LIBAVCODEC_IDENT) + strlen(ost->enc->name) + 2;
2760     encoder_string     = av_mallocz(encoder_string_len);
2761     if (!encoder_string)
2762         exit_program(1);
2763
2764     if (!(format_flags & AVFMT_FLAG_BITEXACT) && !(codec_flags & AV_CODEC_FLAG_BITEXACT))
2765         av_strlcpy(encoder_string, LIBAVCODEC_IDENT " ", encoder_string_len);
2766     else
2767         av_strlcpy(encoder_string, "Lavc ", encoder_string_len);
2768     av_strlcat(encoder_string, ost->enc->name, encoder_string_len);
2769     av_dict_set(&ost->st->metadata, "encoder",  encoder_string,
2770                 AV_DICT_DONT_STRDUP_VAL | AV_DICT_DONT_OVERWRITE);
2771 }
2772
2773 static int transcode_init(void)
2774 {
2775     int ret = 0, i, j, k;
2776     AVFormatContext *oc;
2777     OutputStream *ost;
2778     InputStream *ist;
2779     char error[1024] = {0};
2780     int want_sdp = 1;
2781
2782     for (i = 0; i < nb_filtergraphs; i++) {
2783         FilterGraph *fg = filtergraphs[i];
2784         for (j = 0; j < fg->nb_outputs; j++) {
2785             OutputFilter *ofilter = fg->outputs[j];
2786             if (!ofilter->ost || ofilter->ost->source_index >= 0)
2787                 continue;
2788             if (fg->nb_inputs != 1)
2789                 continue;
2790             for (k = nb_input_streams-1; k >= 0 ; k--)
2791                 if (fg->inputs[0]->ist == input_streams[k])
2792                     break;
2793             ofilter->ost->source_index = k;
2794         }
2795     }
2796
2797     /* init framerate emulation */
2798     for (i = 0; i < nb_input_files; i++) {
2799         InputFile *ifile = input_files[i];
2800         if (ifile->rate_emu)
2801             for (j = 0; j < ifile->nb_streams; j++)
2802                 input_streams[j + ifile->ist_index]->start = av_gettime_relative();
2803     }
2804
2805     /* for each output stream, we compute the right encoding parameters */
2806     for (i = 0; i < nb_output_streams; i++) {
2807         AVCodecContext *enc_ctx;
2808         AVCodecContext *dec_ctx = NULL;
2809         ost = output_streams[i];
2810         oc  = output_files[ost->file_index]->ctx;
2811         ist = get_input_stream(ost);
2812
2813         if (ost->attachment_filename)
2814             continue;
2815
2816         enc_ctx = ost->stream_copy ? ost->st->codec : ost->enc_ctx;
2817
2818         if (ist) {
2819             dec_ctx = ist->dec_ctx;
2820
2821             ost->st->disposition          = ist->st->disposition;
2822             enc_ctx->bits_per_raw_sample    = dec_ctx->bits_per_raw_sample;
2823             enc_ctx->chroma_sample_location = dec_ctx->chroma_sample_location;
2824         } else {
2825             for (j=0; j<oc->nb_streams; j++) {
2826                 AVStream *st = oc->streams[j];
2827                 if (st != ost->st && st->codec->codec_type == enc_ctx->codec_type)
2828                     break;
2829             }
2830             if (j == oc->nb_streams)
2831                 if (enc_ctx->codec_type == AVMEDIA_TYPE_AUDIO || enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO)
2832                     ost->st->disposition = AV_DISPOSITION_DEFAULT;
2833         }
2834
2835         if (ost->stream_copy) {
2836             AVRational sar;
2837             uint64_t extra_size;
2838
2839             av_assert0(ist && !ost->filter);
2840
2841             extra_size = (uint64_t)dec_ctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE;
2842
2843             if (extra_size > INT_MAX) {
2844                 return AVERROR(EINVAL);
2845             }
2846
2847             /* if stream_copy is selected, no need to decode or encode */
2848             enc_ctx->codec_id   = dec_ctx->codec_id;
2849             enc_ctx->codec_type = dec_ctx->codec_type;
2850
2851             if (!enc_ctx->codec_tag) {
2852                 unsigned int codec_tag;
2853                 if (!oc->oformat->codec_tag ||
2854                      av_codec_get_id (oc->oformat->codec_tag, dec_ctx->codec_tag) == enc_ctx->codec_id ||
2855                      !av_codec_get_tag2(oc->oformat->codec_tag, dec_ctx->codec_id, &codec_tag))
2856                     enc_ctx->codec_tag = dec_ctx->codec_tag;
2857             }
2858
2859             enc_ctx->bit_rate       = dec_ctx->bit_rate;
2860             enc_ctx->rc_max_rate    = dec_ctx->rc_max_rate;
2861             enc_ctx->rc_buffer_size = dec_ctx->rc_buffer_size;
2862             enc_ctx->field_order    = dec_ctx->field_order;
2863             if (dec_ctx->extradata_size) {
2864                 enc_ctx->extradata      = av_mallocz(extra_size);
2865                 if (!enc_ctx->extradata) {
2866                     return AVERROR(ENOMEM);
2867                 }
2868                 memcpy(enc_ctx->extradata, dec_ctx->extradata, dec_ctx->extradata_size);
2869             }
2870             enc_ctx->extradata_size= dec_ctx->extradata_size;
2871             enc_ctx->bits_per_coded_sample  = dec_ctx->bits_per_coded_sample;
2872
2873             enc_ctx->time_base = ist->st->time_base;
2874             /*
2875              * Avi is a special case here because it supports variable fps but
2876              * having the fps and timebase differe significantly adds quite some
2877              * overhead
2878              */
2879             if(!strcmp(oc->oformat->name, "avi")) {
2880                 if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
2881                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
2882                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(dec_ctx->time_base)
2883                                && av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(dec_ctx->time_base) < 1.0/500
2884                      || copy_tb==2){
2885                     enc_ctx->time_base.num = ist->st->r_frame_rate.den;
2886                     enc_ctx->time_base.den = 2*ist->st->r_frame_rate.num;
2887                     enc_ctx->ticks_per_frame = 2;
2888                 } else if (   copy_tb<0 && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2889                                  && av_q2d(ist->st->time_base) < 1.0/500
2890                     || copy_tb==0){
2891                     enc_ctx->time_base = dec_ctx->time_base;
2892                     enc_ctx->time_base.num *= dec_ctx->ticks_per_frame;
2893                     enc_ctx->time_base.den *= 2;
2894                     enc_ctx->ticks_per_frame = 2;
2895                 }
2896             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2897                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2898                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2899                       && strcmp(oc->oformat->name, "f4v")
2900             ) {
2901                 if(   copy_tb<0 && dec_ctx->time_base.den
2902                                 && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > av_q2d(ist->st->time_base)
2903                                 && av_q2d(ist->st->time_base) < 1.0/500
2904                    || copy_tb==0){
2905                     enc_ctx->time_base = dec_ctx->time_base;
2906                     enc_ctx->time_base.num *= dec_ctx->ticks_per_frame;
2907                 }
2908             }
2909             if (   enc_ctx->codec_tag == AV_RL32("tmcd")
2910                 && dec_ctx->time_base.num < dec_ctx->time_base.den
2911                 && dec_ctx->time_base.num > 0
2912                 && 121LL*dec_ctx->time_base.num > dec_ctx->time_base.den) {
2913                 enc_ctx->time_base = dec_ctx->time_base;
2914             }
2915
2916             if (!ost->frame_rate.num)
2917                 ost->frame_rate = ist->framerate;
2918             if(ost->frame_rate.num)
2919                 enc_ctx->time_base = av_inv_q(ost->frame_rate);
2920
2921             av_reduce(&enc_ctx->time_base.num, &enc_ctx->time_base.den,
2922                         enc_ctx->time_base.num, enc_ctx->time_base.den, INT_MAX);
2923
2924             if (ist->st->nb_side_data) {
2925                 ost->st->side_data = av_realloc_array(NULL, ist->st->nb_side_data,
2926                                                       sizeof(*ist->st->side_data));
2927                 if (!ost->st->side_data)
2928                     return AVERROR(ENOMEM);
2929
2930                 ost->st->nb_side_data = 0;
2931                 for (j = 0; j < ist->st->nb_side_data; j++) {
2932                     const AVPacketSideData *sd_src = &ist->st->side_data[j];
2933                     AVPacketSideData *sd_dst = &ost->st->side_data[ost->st->nb_side_data];
2934
2935                     if (ost->rotate_overridden && sd_src->type == AV_PKT_DATA_DISPLAYMATRIX)
2936                         continue;
2937
2938                     sd_dst->data = av_malloc(sd_src->size);
2939                     if (!sd_dst->data)
2940                         return AVERROR(ENOMEM);
2941                     memcpy(sd_dst->data, sd_src->data, sd_src->size);
2942                     sd_dst->size = sd_src->size;
2943                     sd_dst->type = sd_src->type;
2944                     ost->st->nb_side_data++;
2945                 }
2946             }
2947
2948             ost->parser = av_parser_init(enc_ctx->codec_id);
2949
2950             switch (enc_ctx->codec_type) {
2951             case AVMEDIA_TYPE_AUDIO:
2952                 if (audio_volume != 256) {
2953                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2954                     exit_program(1);
2955                 }
2956                 enc_ctx->channel_layout     = dec_ctx->channel_layout;
2957                 enc_ctx->sample_rate        = dec_ctx->sample_rate;
2958                 enc_ctx->channels           = dec_ctx->channels;
2959                 enc_ctx->frame_size         = dec_ctx->frame_size;
2960                 enc_ctx->audio_service_type = dec_ctx->audio_service_type;
2961                 enc_ctx->block_align        = dec_ctx->block_align;
2962                 enc_ctx->initial_padding    = dec_ctx->delay;
2963 #if FF_API_AUDIOENC_DELAY
2964                 enc_ctx->delay              = dec_ctx->delay;
2965 #endif
2966                 if((enc_ctx->block_align == 1 || enc_ctx->block_align == 1152 || enc_ctx->block_align == 576) && enc_ctx->codec_id == AV_CODEC_ID_MP3)
2967                     enc_ctx->block_align= 0;
2968                 if(enc_ctx->codec_id == AV_CODEC_ID_AC3)
2969                     enc_ctx->block_align= 0;
2970                 break;
2971             case AVMEDIA_TYPE_VIDEO:
2972                 enc_ctx->pix_fmt            = dec_ctx->pix_fmt;
2973                 enc_ctx->width              = dec_ctx->width;
2974                 enc_ctx->height             = dec_ctx->height;
2975                 enc_ctx->has_b_frames       = dec_ctx->has_b_frames;
2976                 if (ost->frame_aspect_ratio.num) { // overridden by the -aspect cli option
2977                     sar =
2978                         av_mul_q(ost->frame_aspect_ratio,
2979                                  (AVRational){ enc_ctx->height, enc_ctx->width });
2980                     av_log(NULL, AV_LOG_WARNING, "Overriding aspect ratio "
2981                            "with stream copy may produce invalid files\n");
2982                 }
2983                 else if (ist->st->sample_aspect_ratio.num)
2984                     sar = ist->st->sample_aspect_ratio;
2985                 else
2986                     sar = dec_ctx->sample_aspect_ratio;
2987                 ost->st->sample_aspect_ratio = enc_ctx->sample_aspect_ratio = sar;
2988                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2989                 ost->st->r_frame_rate = ist->st->r_frame_rate;
2990                 break;
2991             case AVMEDIA_TYPE_SUBTITLE:
2992                 enc_ctx->width  = dec_ctx->width;
2993                 enc_ctx->height = dec_ctx->height;
2994                 break;
2995             case AVMEDIA_TYPE_UNKNOWN:
2996             case AVMEDIA_TYPE_DATA:
2997             case AVMEDIA_TYPE_ATTACHMENT:
2998                 break;
2999             default:
3000                 abort();
3001             }
3002         } else {
3003             if (!ost->enc)
3004                 ost->enc = avcodec_find_encoder(enc_ctx->codec_id);
3005             if (!ost->enc) {
3006                 /* should only happen when a default codec is not present. */
3007                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
3008                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
3009                 ret = AVERROR(EINVAL);
3010                 goto dump_format;
3011             }
3012
3013             set_encoder_id(output_files[ost->file_index], ost);
3014
3015             if (!ost->filter &&
3016                 (enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO ||
3017                  enc_ctx->codec_type == AVMEDIA_TYPE_AUDIO)) {
3018                     FilterGraph *fg;
3019                     fg = init_simple_filtergraph(ist, ost);
3020                     if (configure_filtergraph(fg)) {
3021                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
3022                         exit_program(1);
3023                     }
3024             }
3025
3026             if (enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
3027                 if (!ost->frame_rate.num)
3028                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
3029                 if (ist && !ost->frame_rate.num)
3030                     ost->frame_rate = ist->framerate;
3031                 if (ist && !ost->frame_rate.num)
3032                     ost->frame_rate = ist->st->r_frame_rate;
3033                 if (ist && !ost->frame_rate.num) {
3034                     ost->frame_rate = (AVRational){25, 1};
3035                     av_log(NULL, AV_LOG_WARNING,
3036                            "No information "
3037                            "about the input framerate is available. Falling "
3038                            "back to a default value of 25fps for output stream #%d:%d. Use the -r option "
3039                            "if you want a different framerate.\n",
3040                            ost->file_index, ost->index);
3041                 }
3042 //                    ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
3043                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
3044                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
3045                     ost->frame_rate = ost->enc->supported_framerates[idx];
3046                 }
3047                 // reduce frame rate for mpeg4 to be within the spec limits
3048                 if (enc_ctx->codec_id == AV_CODEC_ID_MPEG4) {
3049                     av_reduce(&ost->frame_rate.num, &ost->frame_rate.den,
3050                               ost->frame_rate.num, ost->frame_rate.den, 65535);
3051                 }
3052             }
3053
3054             switch (enc_ctx->codec_type) {
3055             case AVMEDIA_TYPE_AUDIO:
3056                 enc_ctx->sample_fmt     = ost->filter->filter->inputs[0]->format;
3057                 enc_ctx->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
3058                 enc_ctx->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
3059                 enc_ctx->channels       = avfilter_link_get_channels(ost->filter->filter->inputs[0]);
3060                 enc_ctx->time_base      = (AVRational){ 1, enc_ctx->sample_rate };
3061                 break;
3062             case AVMEDIA_TYPE_VIDEO:
3063                 enc_ctx->time_base = av_inv_q(ost->frame_rate);
3064                 if (!(enc_ctx->time_base.num && enc_ctx->time_base.den))
3065                     enc_ctx->time_base = ost->filter->filter->inputs[0]->time_base;
3066                 if (   av_q2d(enc_ctx->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
3067                    && (video_sync_method == VSYNC_CFR || video_sync_method == VSYNC_VSCFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
3068                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
3069                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
3070                 }
3071                 for (j = 0; j < ost->forced_kf_count; j++)
3072                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
3073                                                          AV_TIME_BASE_Q,
3074                                                          enc_ctx->time_base);
3075
3076                 enc_ctx->width  = ost->filter->filter->inputs[0]->w;
3077                 enc_ctx->height = ost->filter->filter->inputs[0]->h;
3078                 enc_ctx->sample_aspect_ratio = ost->st->sample_aspect_ratio =
3079                     ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option
3080                     av_mul_q(ost->frame_aspect_ratio, (AVRational){ enc_ctx->height, enc_ctx->width }) :
3081                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
3082                 if (!strncmp(ost->enc->name, "libx264", 7) &&
3083                     enc_ctx->pix_fmt == AV_PIX_FMT_NONE &&
3084                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
3085                     av_log(NULL, AV_LOG_WARNING,
3086                            "No pixel format specified, %s for H.264 encoding chosen.\n"
3087                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
3088                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
3089                 if (!strncmp(ost->enc->name, "mpeg2video", 10) &&
3090                     enc_ctx->pix_fmt == AV_PIX_FMT_NONE &&
3091                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
3092                     av_log(NULL, AV_LOG_WARNING,
3093                            "No pixel format specified, %s for MPEG-2 encoding chosen.\n"
3094                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
3095                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
3096                 enc_ctx->pix_fmt = ost->filter->filter->inputs[0]->format;
3097
3098                 ost->st->avg_frame_rate = ost->frame_rate;
3099
3100                 if (!dec_ctx ||
3101                     enc_ctx->width   != dec_ctx->width  ||
3102                     enc_ctx->height  != dec_ctx->height ||
3103                     enc_ctx->pix_fmt != dec_ctx->pix_fmt) {
3104                     enc_ctx->bits_per_raw_sample = frame_bits_per_raw_sample;
3105                 }
3106
3107                 if (ost->forced_keyframes) {
3108                     if (!strncmp(ost->forced_keyframes, "expr:", 5)) {
3109                         ret = av_expr_parse(&ost->forced_keyframes_pexpr, ost->forced_keyframes+5,
3110                                             forced_keyframes_const_names, NULL, NULL, NULL, NULL, 0, NULL);
3111                         if (ret < 0) {
3112                             av_log(NULL, AV_LOG_ERROR,
3113                                    "Invalid force_key_frames expression '%s'\n", ost->forced_keyframes+5);
3114                             return ret;
3115                         }
3116                         ost->forced_keyframes_expr_const_values[FKF_N] = 0;
3117                         ost->forced_keyframes_expr_const_values[FKF_N_FORCED] = 0;
3118                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] = NAN;
3119                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] = NAN;
3120
3121                         // Don't parse the 'forced_keyframes' in case of 'keep-source-keyframes',
3122                         // parse it only for static kf timings
3123                     } else if(strncmp(ost->forced_keyframes, "source", 6)) {
3124                         parse_forced_key_frames(ost->forced_keyframes, ost, ost->enc_ctx);
3125                     }
3126                 }
3127                 break;
3128             case AVMEDIA_TYPE_SUBTITLE:
3129                 enc_ctx->time_base = (AVRational){1, 1000};
3130                 if (!enc_ctx->width) {
3131                     enc_ctx->width     = input_streams[ost->source_index]->st->codec->width;
3132                     enc_ctx->height    = input_streams[ost->source_index]->st->codec->height;
3133                 }
3134                 break;
3135             case AVMEDIA_TYPE_DATA:
3136                 break;
3137             default:
3138                 abort();
3139                 break;
3140             }
3141         }
3142
3143         if (ost->disposition) {
3144             static const AVOption opts[] = {
3145                 { "disposition"         , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
3146                 { "default"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DEFAULT           },    .unit = "flags" },
3147                 { "dub"                 , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DUB               },    .unit = "flags" },
3148                 { "original"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_ORIGINAL          },    .unit = "flags" },
3149                 { "comment"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_COMMENT           },    .unit = "flags" },
3150                 { "lyrics"              , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_LYRICS            },    .unit = "flags" },
3151                 { "karaoke"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_KARAOKE           },    .unit = "flags" },
3152                 { "forced"              , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_FORCED            },    .unit = "flags" },
3153                 { "hearing_impaired"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_HEARING_IMPAIRED  },    .unit = "flags" },
3154                 { "visual_impaired"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_VISUAL_IMPAIRED   },    .unit = "flags" },
3155                 { "clean_effects"       , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CLEAN_EFFECTS     },    .unit = "flags" },
3156                 { "captions"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CAPTIONS          },    .unit = "flags" },
3157                 { "descriptions"        , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DESCRIPTIONS      },    .unit = "flags" },
3158                 { "metadata"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_METADATA          },    .unit = "flags" },
3159                 { NULL },
3160             };
3161             static const AVClass class = {
3162                 .class_name = "",
3163                 .item_name  = av_default_item_name,
3164                 .option     = opts,
3165                 .version    = LIBAVUTIL_VERSION_INT,
3166             };
3167             const AVClass *pclass = &class;
3168
3169             ret = av_opt_eval_flags(&pclass, &opts[0], ost->disposition, &ost->st->disposition);
3170             if (ret < 0)
3171                 goto dump_format;
3172         }
3173     }
3174
3175     /* open each encoder */
3176     for (i = 0; i < nb_output_streams; i++) {
3177         ret = init_output_stream(output_streams[i], error, sizeof(error));
3178         if (ret < 0)
3179             goto dump_format;
3180     }
3181
3182     /* init input streams */
3183     for (i = 0; i < nb_input_streams; i++)
3184         if ((ret = init_input_stream(i, error, sizeof(error))) < 0) {
3185             for (i = 0; i < nb_output_streams; i++) {
3186                 ost = output_streams[i];
3187                 avcodec_close(ost->enc_ctx);
3188             }
3189             goto dump_format;
3190         }
3191
3192     /* discard unused programs */
3193     for (i = 0; i < nb_input_files; i++) {
3194         InputFile *ifile = input_files[i];
3195         for (j = 0; j < ifile->ctx->nb_programs; j++) {
3196             AVProgram *p = ifile->ctx->programs[j];
3197             int discard  = AVDISCARD_ALL;
3198
3199             for (k = 0; k < p->nb_stream_indexes; k++)
3200                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
3201                     discard = AVDISCARD_DEFAULT;
3202                     break;
3203                 }
3204             p->discard = discard;
3205         }
3206     }
3207
3208     /* open files and write file headers */
3209     for (i = 0; i < nb_output_files; i++) {
3210         oc = output_files[i]->ctx;
3211         oc->interrupt_callback = int_cb;
3212         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
3213             snprintf(error, sizeof(error),
3214                      "Could not write header for output file #%d "
3215                      "(incorrect codec parameters ?): %s",
3216                      i, av_err2str(ret));
3217             ret = AVERROR(EINVAL);
3218             goto dump_format;
3219         }
3220 //         assert_avoptions(output_files[i]->opts);
3221         if (strcmp(oc->oformat->name, "rtp")) {
3222             want_sdp = 0;
3223         }
3224     }
3225
3226  dump_format:
3227     /* dump the file output parameters - cannot be done before in case
3228        of stream copy */
3229     for (i = 0; i < nb_output_files; i++) {
3230         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
3231     }
3232
3233     /* dump the stream mapping */
3234     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
3235     for (i = 0; i < nb_input_streams; i++) {
3236         ist = input_streams[i];
3237
3238         for (j = 0; j < ist->nb_filters; j++) {
3239             if (ist->filters[j]->graph->graph_desc) {
3240                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
3241                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
3242                        ist->filters[j]->name);
3243                 if (nb_filtergraphs > 1)
3244                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
3245                 av_log(NULL, AV_LOG_INFO, "\n");
3246             }
3247         }
3248     }
3249
3250     for (i = 0; i < nb_output_streams; i++) {
3251         ost = output_streams[i];
3252
3253         if (ost->attachment_filename) {
3254             /* an attached file */
3255             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
3256                    ost->attachment_filename, ost->file_index, ost->index);
3257             continue;
3258         }
3259
3260         if (ost->filter && ost->filter->graph->graph_desc) {
3261             /* output from a complex graph */
3262             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
3263             if (nb_filtergraphs > 1)
3264                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
3265
3266             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
3267                    ost->index, ost->enc ? ost->enc->name : "?");
3268             continue;
3269         }
3270
3271         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
3272                input_streams[ost->source_index]->file_index,
3273                input_streams[ost->source_index]->st->index,
3274                ost->file_index,
3275                ost->index);
3276         if (ost->sync_ist != input_streams[ost->source_index])
3277             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
3278                    ost->sync_ist->file_index,
3279                    ost->sync_ist->st->index);
3280         if (ost->stream_copy)
3281             av_log(NULL, AV_LOG_INFO, " (copy)");
3282         else {
3283             const AVCodec *in_codec    = input_streams[ost->source_index]->dec;
3284             const AVCodec *out_codec   = ost->enc;
3285             const char *decoder_name   = "?";
3286             const char *in_codec_name  = "?";
3287             const char *encoder_name   = "?";
3288             const char *out_codec_name = "?";
3289             const AVCodecDescriptor *desc;
3290
3291             if (in_codec) {
3292                 decoder_name  = in_codec->name;
3293                 desc = avcodec_descriptor_get(in_codec->id);
3294                 if (desc)
3295                     in_codec_name = desc->name;
3296                 if (!strcmp(decoder_name, in_codec_name))
3297                     decoder_name = "native";
3298             }
3299
3300             if (out_codec) {
3301                 encoder_name   = out_codec->name;
3302                 desc = avcodec_descriptor_get(out_codec->id);
3303                 if (desc)
3304                     out_codec_name = desc->name;
3305                 if (!strcmp(encoder_name, out_codec_name))
3306                     encoder_name = "native";
3307             }
3308
3309             av_log(NULL, AV_LOG_INFO, " (%s (%s) -> %s (%s))",
3310                    in_codec_name, decoder_name,
3311                    out_codec_name, encoder_name);
3312         }
3313         av_log(NULL, AV_LOG_INFO, "\n");
3314     }
3315
3316     if (ret) {
3317         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
3318         return ret;
3319     }
3320
3321     if (sdp_filename || want_sdp) {
3322         print_sdp();
3323     }
3324
3325     transcode_init_done = 1;
3326
3327     return 0;
3328 }
3329
3330 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
3331 static int need_output(void)
3332 {
3333     int i;
3334
3335     for (i = 0; i < nb_output_streams; i++) {
3336         OutputStream *ost    = output_streams[i];
3337         OutputFile *of       = output_files[ost->file_index];
3338         AVFormatContext *os  = output_files[ost->file_index]->ctx;
3339
3340         if (ost->finished ||
3341             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3342             continue;
3343         if (ost->frame_number >= ost->max_frames) {
3344             int j;
3345             for (j = 0; j < of->ctx->nb_streams; j++)
3346                 close_output_stream(output_streams[of->ost_index + j]);
3347             continue;
3348         }
3349
3350         return 1;
3351     }
3352
3353     return 0;
3354 }
3355
3356 /**
3357  * Select the output stream to process.
3358  *
3359  * @return  selected output stream, or NULL if none available
3360  */
3361 static OutputStream *choose_output(void)
3362 {
3363     int i;
3364     int64_t opts_min = INT64_MAX;
3365     OutputStream *ost_min = NULL;
3366
3367     for (i = 0; i < nb_output_streams; i++) {
3368         OutputStream *ost = output_streams[i];
3369         int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
3370                                     AV_TIME_BASE_Q);
3371         if (!ost->finished && opts < opts_min) {
3372             opts_min = opts;
3373             ost_min  = ost->unavailable ? NULL : ost;
3374         }
3375     }
3376     return ost_min;
3377 }
3378
3379 static int check_keyboard_interaction(int64_t cur_time)
3380 {
3381     int i, ret, key;
3382     static int64_t last_time;
3383     if (received_nb_signals)
3384         return AVERROR_EXIT;
3385     /* read_key() returns 0 on EOF */
3386     if(cur_time - last_time >= 100000 && !run_as_daemon){
3387         key =  read_key();
3388         last_time = cur_time;
3389     }else
3390         key = -1;
3391     if (key == 'q')
3392         return AVERROR_EXIT;
3393     if (key == '+') av_log_set_level(av_log_get_level()+10);
3394     if (key == '-') av_log_set_level(av_log_get_level()-10);
3395     if (key == 's') qp_hist     ^= 1;
3396     if (key == 'h'){
3397         if (do_hex_dump){
3398             do_hex_dump = do_pkt_dump = 0;
3399         } else if(do_pkt_dump){
3400             do_hex_dump = 1;
3401         } else
3402             do_pkt_dump = 1;
3403         av_log_set_level(AV_LOG_DEBUG);
3404     }
3405     if (key == 'c' || key == 'C'){
3406         char buf[4096], target[64], command[256], arg[256] = {0};
3407         double time;
3408         int k, n = 0;
3409         fprintf(stderr, "\nEnter command: <target>|all <time>|-1 <command>[ <argument>]\n");
3410         i = 0;
3411         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3412             if (k > 0)
3413                 buf[i++] = k;
3414         buf[i] = 0;
3415         if (k > 0 &&
3416             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
3417             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
3418                    target, time, command, arg);
3419             for (i = 0; i < nb_filtergraphs; i++) {
3420                 FilterGraph *fg = filtergraphs[i];
3421                 if (fg->graph) {
3422                     if (time < 0) {
3423                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
3424                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
3425                         fprintf(stderr, "Command reply for stream %d: ret:%d res:\n%s", i, ret, buf);
3426                     } else if (key == 'c') {
3427                         fprintf(stderr, "Queing commands only on filters supporting the specific command is unsupported\n");
3428                         ret = AVERROR_PATCHWELCOME;
3429                     } else {
3430                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
3431                         if (ret < 0)
3432                             fprintf(stderr, "Queing command failed with error %s\n", av_err2str(ret));
3433                     }
3434                 }
3435             }
3436         } else {
3437             av_log(NULL, AV_LOG_ERROR,
3438                    "Parse error, at least 3 arguments were expected, "
3439                    "only %d given in string '%s'\n", n, buf);
3440         }
3441     }
3442     if (key == 'd' || key == 'D'){
3443         int debug=0;
3444         if(key == 'D') {
3445             debug = input_streams[0]->st->codec->debug<<1;
3446             if(!debug) debug = 1;
3447             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
3448                 debug += debug;
3449         }else{
3450             char buf[32];
3451             int k = 0;
3452             i = 0;
3453             while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3454                 if (k > 0)
3455                     buf[i++] = k;
3456             buf[i] = 0;
3457             if (k <= 0 || sscanf(buf, "%d", &debug)!=1)
3458                 fprintf(stderr,"error parsing debug value\n");
3459         }
3460         for(i=0;i<nb_input_streams;i++) {
3461             input_streams[i]->st->codec->debug = debug;
3462         }
3463         for(i=0;i<nb_output_streams;i++) {
3464             OutputStream *ost = output_streams[i];
3465             ost->enc_ctx->debug = debug;
3466         }
3467         if(debug) av_log_set_level(AV_LOG_DEBUG);
3468         fprintf(stderr,"debug=%d\n", debug);
3469     }
3470     if (key == '?'){
3471         fprintf(stderr, "key    function\n"
3472                         "?      show this help\n"
3473                         "+      increase verbosity\n"
3474                         "-      decrease verbosity\n"
3475                         "c      Send command to first matching filter supporting it\n"
3476                         "C      Send/Que command to all matching filters\n"
3477                         "D      cycle through available debug modes\n"
3478                         "h      dump packets/hex press to cycle through the 3 states\n"
3479                         "q      quit\n"
3480                         "s      Show QP histogram\n"
3481         );
3482     }
3483     return 0;
3484 }
3485
3486 #if HAVE_PTHREADS
3487 static void *input_thread(void *arg)
3488 {
3489     InputFile *f = arg;
3490     unsigned flags = f->non_blocking ? AV_THREAD_MESSAGE_NONBLOCK : 0;
3491     int ret = 0;
3492
3493     while (1) {
3494         AVPacket pkt;
3495         ret = av_read_frame(f->ctx, &pkt);
3496
3497         if (ret == AVERROR(EAGAIN)) {
3498             av_usleep(10000);
3499             continue;
3500         }
3501         if (ret < 0) {
3502             av_thread_message_queue_set_err_recv(f->in_thread_queue, ret);
3503             break;
3504         }
3505         av_dup_packet(&pkt);
3506         ret = av_thread_message_queue_send(f->in_thread_queue, &pkt, flags);
3507         if (flags && ret == AVERROR(EAGAIN)) {
3508             flags = 0;
3509             ret = av_thread_message_queue_send(f->in_thread_queue, &pkt, flags);
3510             av_log(f->ctx, AV_LOG_WARNING,
3511                    "Thread message queue blocking; consider raising the "
3512                    "thread_queue_size option (current value: %d)\n",
3513                    f->thread_queue_size);
3514         }
3515         if (ret < 0) {
3516             if (ret != AVERROR_EOF)
3517                 av_log(f->ctx, AV_LOG_ERROR,
3518                        "Unable to send packet to main thread: %s\n",
3519                        av_err2str(ret));
3520             av_free_packet(&pkt);
3521             av_thread_message_queue_set_err_recv(f->in_thread_queue, ret);
3522             break;
3523         }
3524     }
3525
3526     return NULL;
3527 }
3528
3529 static void free_input_threads(void)
3530 {
3531     int i;
3532
3533     for (i = 0; i < nb_input_files; i++) {
3534         InputFile *f = input_files[i];
3535         AVPacket pkt;
3536
3537         if (!f || !f->in_thread_queue)
3538             continue;
3539         av_thread_message_queue_set_err_send(f->in_thread_queue, AVERROR_EOF);
3540         while (av_thread_message_queue_recv(f->in_thread_queue, &pkt, 0) >= 0)
3541             av_free_packet(&pkt);
3542
3543         pthread_join(f->thread, NULL);
3544         f->joined = 1;
3545         av_thread_message_queue_free(&f->in_thread_queue);
3546     }
3547 }
3548
3549 static int init_input_threads(void)
3550 {
3551     int i, ret;
3552
3553     if (nb_input_files == 1)
3554         return 0;
3555
3556     for (i = 0; i < nb_input_files; i++) {
3557         InputFile *f = input_files[i];
3558
3559         if (f->ctx->pb ? !f->ctx->pb->seekable :
3560             strcmp(f->ctx->iformat->name, "lavfi"))
3561             f->non_blocking = 1;
3562         ret = av_thread_message_queue_alloc(&f->in_thread_queue,
3563                                             f->thread_queue_size, sizeof(AVPacket));
3564         if (ret < 0)
3565             return ret;
3566
3567         if ((ret = pthread_create(&f->thread, NULL, input_thread, f))) {
3568             av_log(NULL, AV_LOG_ERROR, "pthread_create failed: %s. Try to increase `ulimit -v` or decrease `ulimit -s`.\n", strerror(ret));
3569             av_thread_message_queue_free(&f->in_thread_queue);
3570             return AVERROR(ret);
3571         }
3572     }
3573     return 0;
3574 }
3575
3576 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
3577 {
3578     return av_thread_message_queue_recv(f->in_thread_queue, pkt,
3579                                         f->non_blocking ?
3580                                         AV_THREAD_MESSAGE_NONBLOCK : 0);
3581 }
3582 #endif
3583
3584 static int get_input_packet(InputFile *f, AVPacket *pkt)
3585 {
3586     if (f->rate_emu) {
3587         int i;
3588         for (i = 0; i < f->nb_streams; i++) {
3589             InputStream *ist = input_streams[f->ist_index + i];
3590             int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
3591             int64_t now = av_gettime_relative() - ist->start;
3592             if (pts > now)
3593                 return AVERROR(EAGAIN);
3594         }
3595     }
3596
3597 #if HAVE_PTHREADS
3598     if (nb_input_files > 1)
3599         return get_input_packet_mt(f, pkt);
3600 #endif
3601     return av_read_frame(f->ctx, pkt);
3602 }
3603
3604 static int got_eagain(void)
3605 {
3606     int i;
3607     for (i = 0; i < nb_output_streams; i++)
3608         if (output_streams[i]->unavailable)
3609             return 1;
3610     return 0;
3611 }
3612
3613 static void reset_eagain(void)
3614 {
3615     int i;
3616     for (i = 0; i < nb_input_files; i++)
3617         input_files[i]->eagain = 0;
3618     for (i = 0; i < nb_output_streams; i++)
3619         output_streams[i]->unavailable = 0;