lavf/http: handle case where the server returns a redirect during a seek
[ffmpeg.git] / ffmpeg.c
1 /*
2  * Copyright (c) 2000-2003 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 /**
22  * @file
23  * multimedia converter based on the FFmpeg libraries
24  */
25
26 #include "config.h"
27 #include <ctype.h>
28 #include <string.h>
29 #include <math.h>
30 #include <stdlib.h>
31 #include <errno.h>
32 #include <limits.h>
33 #include <stdint.h>
34
35 #if HAVE_ISATTY
36 #if HAVE_IO_H
37 #include <io.h>
38 #endif
39 #if HAVE_UNISTD_H
40 #include <unistd.h>
41 #endif
42 #endif
43
44 #include "libavformat/avformat.h"
45 #include "libavdevice/avdevice.h"
46 #include "libswresample/swresample.h"
47 #include "libavutil/opt.h"
48 #include "libavutil/channel_layout.h"
49 #include "libavutil/parseutils.h"
50 #include "libavutil/samplefmt.h"
51 #include "libavutil/fifo.h"
52 #include "libavutil/intreadwrite.h"
53 #include "libavutil/dict.h"
54 #include "libavutil/mathematics.h"
55 #include "libavutil/pixdesc.h"
56 #include "libavutil/avstring.h"
57 #include "libavutil/libm.h"
58 #include "libavutil/imgutils.h"
59 #include "libavutil/timestamp.h"
60 #include "libavutil/bprint.h"
61 #include "libavutil/time.h"
62 #include "libavutil/threadmessage.h"
63 #include "libavcodec/mathops.h"
64 #include "libavformat/os_support.h"
65
66 # include "libavfilter/avcodec.h"
67 # include "libavfilter/avfilter.h"
68 # include "libavfilter/buffersrc.h"
69 # include "libavfilter/buffersink.h"
70
71 #if HAVE_SYS_RESOURCE_H
72 #include <sys/time.h>
73 #include <sys/types.h>
74 #include <sys/resource.h>
75 #elif HAVE_GETPROCESSTIMES
76 #include <windows.h>
77 #endif
78 #if HAVE_GETPROCESSMEMORYINFO
79 #include <windows.h>
80 #include <psapi.h>
81 #endif
82
83 #if HAVE_SYS_SELECT_H
84 #include <sys/select.h>
85 #endif
86
87 #if HAVE_TERMIOS_H
88 #include <fcntl.h>
89 #include <sys/ioctl.h>
90 #include <sys/time.h>
91 #include <termios.h>
92 #elif HAVE_KBHIT
93 #include <conio.h>
94 #endif
95
96 #if HAVE_PTHREADS
97 #include <pthread.h>
98 #endif
99
100 #include <time.h>
101
102 #include "ffmpeg.h"
103 #include "cmdutils.h"
104
105 #include "libavutil/avassert.h"
106
107 const char program_name[] = "ffmpeg";
108 const int program_birth_year = 2000;
109
110 static FILE *vstats_file;
111
112 const char *const forced_keyframes_const_names[] = {
113     "n",
114     "n_forced",
115     "prev_forced_n",
116     "prev_forced_t",
117     "t",
118     NULL
119 };
120
121 static void do_video_stats(OutputStream *ost, int frame_size);
122 static int64_t getutime(void);
123 static int64_t getmaxrss(void);
124
125 static int run_as_daemon  = 0;
126 static int nb_frames_dup = 0;
127 static int nb_frames_drop = 0;
128 static int64_t decode_error_stat[2];
129
130 static int current_time;
131 AVIOContext *progress_avio = NULL;
132
133 static uint8_t *subtitle_out;
134
135 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
136
137 InputStream **input_streams = NULL;
138 int        nb_input_streams = 0;
139 InputFile   **input_files   = NULL;
140 int        nb_input_files   = 0;
141
142 OutputStream **output_streams = NULL;
143 int         nb_output_streams = 0;
144 OutputFile   **output_files   = NULL;
145 int         nb_output_files   = 0;
146
147 FilterGraph **filtergraphs;
148 int        nb_filtergraphs;
149
150 #if HAVE_TERMIOS_H
151
152 /* init terminal so that we can grab keys */
153 static struct termios oldtty;
154 static int restore_tty;
155 #endif
156
157 #if HAVE_PTHREADS
158 static void free_input_threads(void);
159 #endif
160
161 /* sub2video hack:
162    Convert subtitles to video with alpha to insert them in filter graphs.
163    This is a temporary solution until libavfilter gets real subtitles support.
164  */
165
166 static int sub2video_get_blank_frame(InputStream *ist)
167 {
168     int ret;
169     AVFrame *frame = ist->sub2video.frame;
170
171     av_frame_unref(frame);
172     ist->sub2video.frame->width  = ist->sub2video.w;
173     ist->sub2video.frame->height = ist->sub2video.h;
174     ist->sub2video.frame->format = AV_PIX_FMT_RGB32;
175     if ((ret = av_frame_get_buffer(frame, 32)) < 0)
176         return ret;
177     memset(frame->data[0], 0, frame->height * frame->linesize[0]);
178     return 0;
179 }
180
181 static void sub2video_copy_rect(uint8_t *dst, int dst_linesize, int w, int h,
182                                 AVSubtitleRect *r)
183 {
184     uint32_t *pal, *dst2;
185     uint8_t *src, *src2;
186     int x, y;
187
188     if (r->type != SUBTITLE_BITMAP) {
189         av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n");
190         return;
191     }
192     if (r->x < 0 || r->x + r->w > w || r->y < 0 || r->y + r->h > h) {
193         av_log(NULL, AV_LOG_WARNING, "sub2video: rectangle overflowing\n");
194         return;
195     }
196
197     dst += r->y * dst_linesize + r->x * 4;
198     src = r->pict.data[0];
199     pal = (uint32_t *)r->pict.data[1];
200     for (y = 0; y < r->h; y++) {
201         dst2 = (uint32_t *)dst;
202         src2 = src;
203         for (x = 0; x < r->w; x++)
204             *(dst2++) = pal[*(src2++)];
205         dst += dst_linesize;
206         src += r->pict.linesize[0];
207     }
208 }
209
210 static void sub2video_push_ref(InputStream *ist, int64_t pts)
211 {
212     AVFrame *frame = ist->sub2video.frame;
213     int i;
214
215     av_assert1(frame->data[0]);
216     ist->sub2video.last_pts = frame->pts = pts;
217     for (i = 0; i < ist->nb_filters; i++)
218         av_buffersrc_add_frame_flags(ist->filters[i]->filter, frame,
219                                      AV_BUFFERSRC_FLAG_KEEP_REF |
220                                      AV_BUFFERSRC_FLAG_PUSH);
221 }
222
223 static void sub2video_update(InputStream *ist, AVSubtitle *sub)
224 {
225     int w = ist->sub2video.w, h = ist->sub2video.h;
226     AVFrame *frame = ist->sub2video.frame;
227     int8_t *dst;
228     int     dst_linesize;
229     int num_rects, i;
230     int64_t pts, end_pts;
231
232     if (!frame)
233         return;
234     if (sub) {
235         pts       = av_rescale_q(sub->pts + sub->start_display_time * 1000LL,
236                                  AV_TIME_BASE_Q, ist->st->time_base);
237         end_pts   = av_rescale_q(sub->pts + sub->end_display_time   * 1000LL,
238                                  AV_TIME_BASE_Q, ist->st->time_base);
239         num_rects = sub->num_rects;
240     } else {
241         pts       = ist->sub2video.end_pts;
242         end_pts   = INT64_MAX;
243         num_rects = 0;
244     }
245     if (sub2video_get_blank_frame(ist) < 0) {
246         av_log(ist->dec_ctx, AV_LOG_ERROR,
247                "Impossible to get a blank canvas.\n");
248         return;
249     }
250     dst          = frame->data    [0];
251     dst_linesize = frame->linesize[0];
252     for (i = 0; i < num_rects; i++)
253         sub2video_copy_rect(dst, dst_linesize, w, h, sub->rects[i]);
254     sub2video_push_ref(ist, pts);
255     ist->sub2video.end_pts = end_pts;
256 }
257
258 static void sub2video_heartbeat(InputStream *ist, int64_t pts)
259 {
260     InputFile *infile = input_files[ist->file_index];
261     int i, j, nb_reqs;
262     int64_t pts2;
263
264     /* When a frame is read from a file, examine all sub2video streams in
265        the same file and send the sub2video frame again. Otherwise, decoded
266        video frames could be accumulating in the filter graph while a filter
267        (possibly overlay) is desperately waiting for a subtitle frame. */
268     for (i = 0; i < infile->nb_streams; i++) {
269         InputStream *ist2 = input_streams[infile->ist_index + i];
270         if (!ist2->sub2video.frame)
271             continue;
272         /* subtitles seem to be usually muxed ahead of other streams;
273            if not, subtracting a larger time here is necessary */
274         pts2 = av_rescale_q(pts, ist->st->time_base, ist2->st->time_base) - 1;
275         /* do not send the heartbeat frame if the subtitle is already ahead */
276         if (pts2 <= ist2->sub2video.last_pts)
277             continue;
278         if (pts2 >= ist2->sub2video.end_pts || !ist2->sub2video.frame->data[0])
279             sub2video_update(ist2, NULL);
280         for (j = 0, nb_reqs = 0; j < ist2->nb_filters; j++)
281             nb_reqs += av_buffersrc_get_nb_failed_requests(ist2->filters[j]->filter);
282         if (nb_reqs)
283             sub2video_push_ref(ist2, pts2);
284     }
285 }
286
287 static void sub2video_flush(InputStream *ist)
288 {
289     int i;
290
291     if (ist->sub2video.end_pts < INT64_MAX)
292         sub2video_update(ist, NULL);
293     for (i = 0; i < ist->nb_filters; i++)
294         av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
295 }
296
297 /* end of sub2video hack */
298
299 static void term_exit_sigsafe(void)
300 {
301 #if HAVE_TERMIOS_H
302     if(restore_tty)
303         tcsetattr (0, TCSANOW, &oldtty);
304 #endif
305 }
306
307 void term_exit(void)
308 {
309     av_log(NULL, AV_LOG_QUIET, "%s", "");
310     term_exit_sigsafe();
311 }
312
313 static volatile int received_sigterm = 0;
314 static volatile int received_nb_signals = 0;
315 static volatile int transcode_init_done = 0;
316 static int main_return_code = 0;
317
318 static void
319 sigterm_handler(int sig)
320 {
321     received_sigterm = sig;
322     received_nb_signals++;
323     term_exit_sigsafe();
324     if(received_nb_signals > 3)
325         exit(123);
326 }
327
328 void term_init(void)
329 {
330 #if HAVE_TERMIOS_H
331     if(!run_as_daemon){
332         struct termios tty;
333         int istty = 1;
334 #if HAVE_ISATTY
335         istty = isatty(0) && isatty(2);
336 #endif
337         if (istty && tcgetattr (0, &tty) == 0) {
338             oldtty = tty;
339             restore_tty = 1;
340
341             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
342                              |INLCR|IGNCR|ICRNL|IXON);
343             tty.c_oflag |= OPOST;
344             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
345             tty.c_cflag &= ~(CSIZE|PARENB);
346             tty.c_cflag |= CS8;
347             tty.c_cc[VMIN] = 1;
348             tty.c_cc[VTIME] = 0;
349
350             tcsetattr (0, TCSANOW, &tty);
351         }
352         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
353     }
354 #endif
355     avformat_network_deinit();
356
357     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
358     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
359 #ifdef SIGXCPU
360     signal(SIGXCPU, sigterm_handler);
361 #endif
362 }
363
364 /* read a key without blocking */
365 static int read_key(void)
366 {
367     unsigned char ch;
368 #if HAVE_TERMIOS_H
369     int n = 1;
370     struct timeval tv;
371     fd_set rfds;
372
373     FD_ZERO(&rfds);
374     FD_SET(0, &rfds);
375     tv.tv_sec = 0;
376     tv.tv_usec = 0;
377     n = select(1, &rfds, NULL, NULL, &tv);
378     if (n > 0) {
379         n = read(0, &ch, 1);
380         if (n == 1)
381             return ch;
382
383         return n;
384     }
385 #elif HAVE_KBHIT
386 #    if HAVE_PEEKNAMEDPIPE
387     static int is_pipe;
388     static HANDLE input_handle;
389     DWORD dw, nchars;
390     if(!input_handle){
391         input_handle = GetStdHandle(STD_INPUT_HANDLE);
392         is_pipe = !GetConsoleMode(input_handle, &dw);
393     }
394
395     if (stdin->_cnt > 0) {
396         read(0, &ch, 1);
397         return ch;
398     }
399     if (is_pipe) {
400         /* When running under a GUI, you will end here. */
401         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL)) {
402             // input pipe may have been closed by the program that ran ffmpeg
403             return -1;
404         }
405         //Read it
406         if(nchars != 0) {
407             read(0, &ch, 1);
408             return ch;
409         }else{
410             return -1;
411         }
412     }
413 #    endif
414     if(kbhit())
415         return(getch());
416 #endif
417     return -1;
418 }
419
420 static int decode_interrupt_cb(void *ctx)
421 {
422     return received_nb_signals > transcode_init_done;
423 }
424
425 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
426
427 static void ffmpeg_cleanup(int ret)
428 {
429     int i, j;
430
431     if (do_benchmark) {
432         int maxrss = getmaxrss() / 1024;
433         printf("bench: maxrss=%ikB\n", maxrss);
434     }
435
436     for (i = 0; i < nb_filtergraphs; i++) {
437         FilterGraph *fg = filtergraphs[i];
438         avfilter_graph_free(&fg->graph);
439         for (j = 0; j < fg->nb_inputs; j++) {
440             av_freep(&fg->inputs[j]->name);
441             av_freep(&fg->inputs[j]);
442         }
443         av_freep(&fg->inputs);
444         for (j = 0; j < fg->nb_outputs; j++) {
445             av_freep(&fg->outputs[j]->name);
446             av_freep(&fg->outputs[j]);
447         }
448         av_freep(&fg->outputs);
449         av_freep(&fg->graph_desc);
450
451         av_freep(&filtergraphs[i]);
452     }
453     av_freep(&filtergraphs);
454
455     av_freep(&subtitle_out);
456
457     /* close files */
458     for (i = 0; i < nb_output_files; i++) {
459         OutputFile *of = output_files[i];
460         AVFormatContext *s = of->ctx;
461         if (s && s->oformat && !(s->oformat->flags & AVFMT_NOFILE))
462             avio_closep(&s->pb);
463         avformat_free_context(s);
464         av_dict_free(&of->opts);
465
466         av_freep(&output_files[i]);
467     }
468     for (i = 0; i < nb_output_streams; i++) {
469         OutputStream *ost = output_streams[i];
470         AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
471         while (bsfc) {
472             AVBitStreamFilterContext *next = bsfc->next;
473             av_bitstream_filter_close(bsfc);
474             bsfc = next;
475         }
476         ost->bitstream_filters = NULL;
477         av_frame_free(&ost->filtered_frame);
478         av_frame_free(&ost->last_frame);
479
480         av_parser_close(ost->parser);
481
482         av_freep(&ost->forced_keyframes);
483         av_expr_free(ost->forced_keyframes_pexpr);
484         av_freep(&ost->avfilter);
485         av_freep(&ost->logfile_prefix);
486
487         av_freep(&ost->audio_channels_map);
488         ost->audio_channels_mapped = 0;
489
490         avcodec_free_context(&ost->enc_ctx);
491
492         av_freep(&output_streams[i]);
493     }
494 #if HAVE_PTHREADS
495     free_input_threads();
496 #endif
497     for (i = 0; i < nb_input_files; i++) {
498         avformat_close_input(&input_files[i]->ctx);
499         av_freep(&input_files[i]);
500     }
501     for (i = 0; i < nb_input_streams; i++) {
502         InputStream *ist = input_streams[i];
503
504         av_frame_free(&ist->decoded_frame);
505         av_frame_free(&ist->filter_frame);
506         av_dict_free(&ist->decoder_opts);
507         avsubtitle_free(&ist->prev_sub.subtitle);
508         av_frame_free(&ist->sub2video.frame);
509         av_freep(&ist->filters);
510         av_freep(&ist->hwaccel_device);
511
512         avcodec_free_context(&ist->dec_ctx);
513
514         av_freep(&input_streams[i]);
515     }
516
517     if (vstats_file)
518         fclose(vstats_file);
519     av_freep(&vstats_filename);
520
521     av_freep(&input_streams);
522     av_freep(&input_files);
523     av_freep(&output_streams);
524     av_freep(&output_files);
525
526     uninit_opts();
527
528     avformat_network_deinit();
529
530     if (received_sigterm) {
531         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
532                (int) received_sigterm);
533     } else if (ret && transcode_init_done) {
534         av_log(NULL, AV_LOG_INFO, "Conversion failed!\n");
535     }
536     term_exit();
537 }
538
539 void remove_avoptions(AVDictionary **a, AVDictionary *b)
540 {
541     AVDictionaryEntry *t = NULL;
542
543     while ((t = av_dict_get(b, "", t, AV_DICT_IGNORE_SUFFIX))) {
544         av_dict_set(a, t->key, NULL, AV_DICT_MATCH_CASE);
545     }
546 }
547
548 void assert_avoptions(AVDictionary *m)
549 {
550     AVDictionaryEntry *t;
551     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
552         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
553         exit_program(1);
554     }
555 }
556
557 static void abort_codec_experimental(AVCodec *c, int encoder)
558 {
559     exit_program(1);
560 }
561
562 static void update_benchmark(const char *fmt, ...)
563 {
564     if (do_benchmark_all) {
565         int64_t t = getutime();
566         va_list va;
567         char buf[1024];
568
569         if (fmt) {
570             va_start(va, fmt);
571             vsnprintf(buf, sizeof(buf), fmt, va);
572             va_end(va);
573             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
574         }
575         current_time = t;
576     }
577 }
578
579 static void close_all_output_streams(OutputStream *ost, OSTFinished this_stream, OSTFinished others)
580 {
581     int i;
582     for (i = 0; i < nb_output_streams; i++) {
583         OutputStream *ost2 = output_streams[i];
584         ost2->finished |= ost == ost2 ? this_stream : others;
585     }
586 }
587
588 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
589 {
590     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
591     AVCodecContext          *avctx = ost->encoding_needed ? ost->enc_ctx : ost->st->codec;
592     int ret;
593
594     if (!ost->st->codec->extradata_size && ost->enc_ctx->extradata_size) {
595         ost->st->codec->extradata = av_mallocz(ost->enc_ctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
596         if (ost->st->codec->extradata) {
597             memcpy(ost->st->codec->extradata, ost->enc_ctx->extradata, ost->enc_ctx->extradata_size);
598             ost->st->codec->extradata_size = ost->enc_ctx->extradata_size;
599         }
600     }
601
602     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
603         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
604         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
605
606     /*
607      * Audio encoders may split the packets --  #frames in != #packets out.
608      * But there is no reordering, so we can limit the number of output packets
609      * by simply dropping them here.
610      * Counting encoded video frames needs to be done separately because of
611      * reordering, see do_video_out()
612      */
613     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
614         if (ost->frame_number >= ost->max_frames) {
615             av_free_packet(pkt);
616             return;
617         }
618         ost->frame_number++;
619     }
620
621     if (bsfc)
622         av_packet_split_side_data(pkt);
623
624     while (bsfc) {
625         AVPacket new_pkt = *pkt;
626         AVDictionaryEntry *bsf_arg = av_dict_get(ost->bsf_args,
627                                                  bsfc->filter->name,
628                                                  NULL, 0);
629         int a = av_bitstream_filter_filter(bsfc, avctx,
630                                            bsf_arg ? bsf_arg->value : NULL,
631                                            &new_pkt.data, &new_pkt.size,
632                                            pkt->data, pkt->size,
633                                            pkt->flags & AV_PKT_FLAG_KEY);
634         if(a == 0 && new_pkt.data != pkt->data && new_pkt.destruct) {
635             uint8_t *t = av_malloc(new_pkt.size + FF_INPUT_BUFFER_PADDING_SIZE); //the new should be a subset of the old so cannot overflow
636             if(t) {
637                 memcpy(t, new_pkt.data, new_pkt.size);
638                 memset(t + new_pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
639                 new_pkt.data = t;
640                 new_pkt.buf = NULL;
641                 a = 1;
642             } else
643                 a = AVERROR(ENOMEM);
644         }
645         if (a > 0) {
646             pkt->side_data = NULL;
647             pkt->side_data_elems = 0;
648             av_free_packet(pkt);
649             new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
650                                            av_buffer_default_free, NULL, 0);
651             if (!new_pkt.buf)
652                 exit_program(1);
653         } else if (a < 0) {
654             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
655                    bsfc->filter->name, pkt->stream_index,
656                    avctx->codec ? avctx->codec->name : "copy");
657             print_error("", a);
658             if (exit_on_error)
659                 exit_program(1);
660         }
661         *pkt = new_pkt;
662
663         bsfc = bsfc->next;
664     }
665
666     if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
667         if (pkt->dts != AV_NOPTS_VALUE &&
668             pkt->pts != AV_NOPTS_VALUE &&
669             pkt->dts > pkt->pts) {
670             av_log(s, AV_LOG_WARNING, "Invalid DTS: %"PRId64" PTS: %"PRId64" in output stream %d:%d, replacing by guess\n",
671                    pkt->dts, pkt->pts,
672                    ost->file_index, ost->st->index);
673             pkt->pts =
674             pkt->dts = pkt->pts + pkt->dts + ost->last_mux_dts + 1
675                      - FFMIN3(pkt->pts, pkt->dts, ost->last_mux_dts + 1)
676                      - FFMAX3(pkt->pts, pkt->dts, ost->last_mux_dts + 1);
677         }
678      if(
679         (avctx->codec_type == AVMEDIA_TYPE_AUDIO || avctx->codec_type == AVMEDIA_TYPE_VIDEO) &&
680         pkt->dts != AV_NOPTS_VALUE &&
681         ost->last_mux_dts != AV_NOPTS_VALUE) {
682       int64_t max = ost->last_mux_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
683       if (pkt->dts < max) {
684         int loglevel = max - pkt->dts > 2 || avctx->codec_type == AVMEDIA_TYPE_VIDEO ? AV_LOG_WARNING : AV_LOG_DEBUG;
685         av_log(s, loglevel, "Non-monotonous DTS in output stream "
686                "%d:%d; previous: %"PRId64", current: %"PRId64"; ",
687                ost->file_index, ost->st->index, ost->last_mux_dts, pkt->dts);
688         if (exit_on_error) {
689             av_log(NULL, AV_LOG_FATAL, "aborting.\n");
690             exit_program(1);
691         }
692         av_log(s, loglevel, "changing to %"PRId64". This may result "
693                "in incorrect timestamps in the output file.\n",
694                max);
695         if(pkt->pts >= pkt->dts)
696             pkt->pts = FFMAX(pkt->pts, max);
697         pkt->dts = max;
698       }
699      }
700     }
701     ost->last_mux_dts = pkt->dts;
702
703     ost->data_size += pkt->size;
704     ost->packets_written++;
705
706     pkt->stream_index = ost->index;
707
708     if (debug_ts) {
709         av_log(NULL, AV_LOG_INFO, "muxer <- type:%s "
710                 "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s size:%d\n",
711                 av_get_media_type_string(ost->enc_ctx->codec_type),
712                 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ost->st->time_base),
713                 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->st->time_base),
714                 pkt->size
715               );
716     }
717
718     ret = av_interleaved_write_frame(s, pkt);
719     if (ret < 0) {
720         print_error("av_interleaved_write_frame()", ret);
721         main_return_code = 1;
722         close_all_output_streams(ost, MUXER_FINISHED | ENCODER_FINISHED, ENCODER_FINISHED);
723     }
724     av_free_packet(pkt);
725 }
726
727 static void close_output_stream(OutputStream *ost)
728 {
729     OutputFile *of = output_files[ost->file_index];
730
731     ost->finished |= ENCODER_FINISHED;
732     if (of->shortest) {
733         int64_t end = av_rescale_q(ost->sync_opts - ost->first_pts, ost->enc_ctx->time_base, AV_TIME_BASE_Q);
734         of->recording_time = FFMIN(of->recording_time, end);
735     }
736 }
737
738 static int check_recording_time(OutputStream *ost)
739 {
740     OutputFile *of = output_files[ost->file_index];
741
742     if (of->recording_time != INT64_MAX &&
743         av_compare_ts(ost->sync_opts - ost->first_pts, ost->enc_ctx->time_base, of->recording_time,
744                       AV_TIME_BASE_Q) >= 0) {
745         close_output_stream(ost);
746         return 0;
747     }
748     return 1;
749 }
750
751 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
752                          AVFrame *frame)
753 {
754     AVCodecContext *enc = ost->enc_ctx;
755     AVPacket pkt;
756     int got_packet = 0;
757
758     av_init_packet(&pkt);
759     pkt.data = NULL;
760     pkt.size = 0;
761
762     if (!check_recording_time(ost))
763         return;
764
765     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
766         frame->pts = ost->sync_opts;
767     ost->sync_opts = frame->pts + frame->nb_samples;
768     ost->samples_encoded += frame->nb_samples;
769     ost->frames_encoded++;
770
771     av_assert0(pkt.size || !pkt.data);
772     update_benchmark(NULL);
773     if (debug_ts) {
774         av_log(NULL, AV_LOG_INFO, "encoder <- type:audio "
775                "frame_pts:%s frame_pts_time:%s time_base:%d/%d\n",
776                av_ts2str(frame->pts), av_ts2timestr(frame->pts, &enc->time_base),
777                enc->time_base.num, enc->time_base.den);
778     }
779
780     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
781         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
782         exit_program(1);
783     }
784     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
785
786     if (got_packet) {
787         av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
788
789         if (debug_ts) {
790             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
791                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
792                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
793                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
794         }
795
796         write_frame(s, &pkt, ost);
797     }
798 }
799
800 static void do_subtitle_out(AVFormatContext *s,
801                             OutputStream *ost,
802                             InputStream *ist,
803                             AVSubtitle *sub)
804 {
805     int subtitle_out_max_size = 1024 * 1024;
806     int subtitle_out_size, nb, i;
807     AVCodecContext *enc;
808     AVPacket pkt;
809     int64_t pts;
810
811     if (sub->pts == AV_NOPTS_VALUE) {
812         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
813         if (exit_on_error)
814             exit_program(1);
815         return;
816     }
817
818     enc = ost->enc_ctx;
819
820     if (!subtitle_out) {
821         subtitle_out = av_malloc(subtitle_out_max_size);
822         if (!subtitle_out) {
823             av_log(NULL, AV_LOG_FATAL, "Failed to allocate subtitle_out\n");
824             exit_program(1);
825         }
826     }
827
828     /* Note: DVB subtitle need one packet to draw them and one other
829        packet to clear them */
830     /* XXX: signal it in the codec context ? */
831     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
832         nb = 2;
833     else
834         nb = 1;
835
836     /* shift timestamp to honor -ss and make check_recording_time() work with -t */
837     pts = sub->pts;
838     if (output_files[ost->file_index]->start_time != AV_NOPTS_VALUE)
839         pts -= output_files[ost->file_index]->start_time;
840     for (i = 0; i < nb; i++) {
841         unsigned save_num_rects = sub->num_rects;
842
843         ost->sync_opts = av_rescale_q(pts, AV_TIME_BASE_Q, enc->time_base);
844         if (!check_recording_time(ost))
845             return;
846
847         sub->pts = pts;
848         // start_display_time is required to be 0
849         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
850         sub->end_display_time  -= sub->start_display_time;
851         sub->start_display_time = 0;
852         if (i == 1)
853             sub->num_rects = 0;
854
855         ost->frames_encoded++;
856
857         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
858                                                     subtitle_out_max_size, sub);
859         if (i == 1)
860             sub->num_rects = save_num_rects;
861         if (subtitle_out_size < 0) {
862             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
863             exit_program(1);
864         }
865
866         av_init_packet(&pkt);
867         pkt.data = subtitle_out;
868         pkt.size = subtitle_out_size;
869         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
870         pkt.duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->st->time_base);
871         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
872             /* XXX: the pts correction is handled here. Maybe handling
873                it in the codec would be better */
874             if (i == 0)
875                 pkt.pts += 90 * sub->start_display_time;
876             else
877                 pkt.pts += 90 * sub->end_display_time;
878         }
879         pkt.dts = pkt.pts;
880         write_frame(s, &pkt, ost);
881     }
882 }
883
884 static void do_video_out(AVFormatContext *s,
885                          OutputStream *ost,
886                          AVFrame *next_picture,
887                          double sync_ipts)
888 {
889     int ret, format_video_sync;
890     AVPacket pkt;
891     AVCodecContext *enc = ost->enc_ctx;
892     AVCodecContext *mux_enc = ost->st->codec;
893     int nb_frames, nb0_frames, i;
894     double delta, delta0;
895     double duration = 0;
896     int frame_size = 0;
897     InputStream *ist = NULL;
898     AVFilterContext *filter = ost->filter->filter;
899
900     if (ost->source_index >= 0)
901         ist = input_streams[ost->source_index];
902
903     if (filter->inputs[0]->frame_rate.num > 0 &&
904         filter->inputs[0]->frame_rate.den > 0)
905         duration = 1/(av_q2d(filter->inputs[0]->frame_rate) * av_q2d(enc->time_base));
906
907     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
908         duration = FFMIN(duration, 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base)));
909
910     if (!ost->filters_script &&
911         !ost->filters &&
912         next_picture &&
913         ist &&
914         lrintf(av_frame_get_pkt_duration(next_picture) * av_q2d(ist->st->time_base) / av_q2d(enc->time_base)) > 0) {
915         duration = lrintf(av_frame_get_pkt_duration(next_picture) * av_q2d(ist->st->time_base) / av_q2d(enc->time_base));
916     }
917
918     if (!next_picture) {
919         //end, flushing
920         nb0_frames = nb_frames = mid_pred(ost->last_nb0_frames[0],
921                                           ost->last_nb0_frames[1],
922                                           ost->last_nb0_frames[2]);
923     } else {
924         delta0 = sync_ipts - ost->sync_opts;
925         delta  = delta0 + duration;
926
927         /* by default, we output a single frame */
928         nb0_frames = 0;
929         nb_frames = 1;
930
931         format_video_sync = video_sync_method;
932         if (format_video_sync == VSYNC_AUTO) {
933             if(!strcmp(s->oformat->name, "avi")) {
934                 format_video_sync = VSYNC_VFR;
935             } else
936                 format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : VSYNC_CFR;
937             if (   ist
938                 && format_video_sync == VSYNC_CFR
939                 && input_files[ist->file_index]->ctx->nb_streams == 1
940                 && input_files[ist->file_index]->input_ts_offset == 0) {
941                 format_video_sync = VSYNC_VSCFR;
942             }
943             if (format_video_sync == VSYNC_CFR && copy_ts) {
944                 format_video_sync = VSYNC_VSCFR;
945             }
946         }
947
948         if (delta0 < 0 &&
949             delta > 0 &&
950             format_video_sync != VSYNC_PASSTHROUGH &&
951             format_video_sync != VSYNC_DROP) {
952             double cor = FFMIN(-delta0, duration);
953             if (delta0 < -0.6) {
954                 av_log(NULL, AV_LOG_WARNING, "Past duration %f too large\n", -delta0);
955             } else
956                 av_log(NULL, AV_LOG_DEBUG, "Cliping frame in rate conversion by %f\n", -delta0);
957             sync_ipts += cor;
958             duration -= cor;
959             delta0 += cor;
960         }
961
962         switch (format_video_sync) {
963         case VSYNC_VSCFR:
964             if (ost->frame_number == 0 && delta - duration >= 0.5) {
965                 av_log(NULL, AV_LOG_DEBUG, "Not duplicating %d initial frames\n", (int)lrintf(delta - duration));
966                 delta = duration;
967                 delta0 = 0;
968                 ost->sync_opts = lrint(sync_ipts);
969             }
970         case VSYNC_CFR:
971             // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
972             if (frame_drop_threshold && delta < frame_drop_threshold && ost->frame_number) {
973                 nb_frames = 0;
974             } else if (delta < -1.1)
975                 nb_frames = 0;
976             else if (delta > 1.1) {
977                 nb_frames = lrintf(delta);
978                 if (delta0 > 1.1)
979                     nb0_frames = lrintf(delta0 - 0.6);
980             }
981             break;
982         case VSYNC_VFR:
983             if (delta <= -0.6)
984                 nb_frames = 0;
985             else if (delta > 0.6)
986                 ost->sync_opts = lrint(sync_ipts);
987             break;
988         case VSYNC_DROP:
989         case VSYNC_PASSTHROUGH:
990             ost->sync_opts = lrint(sync_ipts);
991             break;
992         default:
993             av_assert0(0);
994         }
995     }
996
997     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
998     nb0_frames = FFMIN(nb0_frames, nb_frames);
999
1000     memmove(ost->last_nb0_frames + 1,
1001             ost->last_nb0_frames,
1002             sizeof(ost->last_nb0_frames[0]) * (FF_ARRAY_ELEMS(ost->last_nb0_frames) - 1));
1003     ost->last_nb0_frames[0] = nb0_frames;
1004
1005     if (nb0_frames == 0 && ost->last_droped) {
1006         nb_frames_drop++;
1007         av_log(NULL, AV_LOG_VERBOSE,
1008                "*** dropping frame %d from stream %d at ts %"PRId64"\n",
1009                ost->frame_number, ost->st->index, ost->last_frame->pts);
1010     }
1011     if (nb_frames > (nb0_frames && ost->last_droped) + (nb_frames > nb0_frames)) {
1012         if (nb_frames > dts_error_threshold * 30) {
1013             av_log(NULL, AV_LOG_ERROR, "%d frame duplication too large, skipping\n", nb_frames - 1);
1014             nb_frames_drop++;
1015             return;
1016         }
1017         nb_frames_dup += nb_frames - (nb0_frames && ost->last_droped) - (nb_frames > nb0_frames);
1018         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
1019     }
1020     ost->last_droped = nb_frames == nb0_frames && next_picture;
1021
1022   /* duplicates frame if needed */
1023   for (i = 0; i < nb_frames; i++) {
1024     AVFrame *in_picture;
1025     av_init_packet(&pkt);
1026     pkt.data = NULL;
1027     pkt.size = 0;
1028
1029     if (i < nb0_frames && ost->last_frame) {
1030         in_picture = ost->last_frame;
1031     } else
1032         in_picture = next_picture;
1033
1034     in_picture->pts = ost->sync_opts;
1035
1036 #if 1
1037     if (!check_recording_time(ost))
1038 #else
1039     if (ost->frame_number >= ost->max_frames)
1040 #endif
1041         return;
1042
1043     if (s->oformat->flags & AVFMT_RAWPICTURE &&
1044         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
1045         /* raw pictures are written as AVPicture structure to
1046            avoid any copies. We support temporarily the older
1047            method. */
1048         if (in_picture->interlaced_frame)
1049             mux_enc->field_order = in_picture->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
1050         else
1051             mux_enc->field_order = AV_FIELD_PROGRESSIVE;
1052         pkt.data   = (uint8_t *)in_picture;
1053         pkt.size   =  sizeof(AVPicture);
1054         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
1055         pkt.flags |= AV_PKT_FLAG_KEY;
1056
1057         write_frame(s, &pkt, ost);
1058     } else {
1059         int got_packet, forced_keyframe = 0;
1060         double pts_time;
1061
1062         if (enc->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME) &&
1063             ost->top_field_first >= 0)
1064             in_picture->top_field_first = !!ost->top_field_first;
1065
1066         if (in_picture->interlaced_frame) {
1067             if (enc->codec->id == AV_CODEC_ID_MJPEG)
1068                 mux_enc->field_order = in_picture->top_field_first ? AV_FIELD_TT:AV_FIELD_BB;
1069             else
1070                 mux_enc->field_order = in_picture->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
1071         } else
1072             mux_enc->field_order = AV_FIELD_PROGRESSIVE;
1073
1074         in_picture->quality = enc->global_quality;
1075         in_picture->pict_type = 0;
1076
1077         pts_time = in_picture->pts != AV_NOPTS_VALUE ?
1078             in_picture->pts * av_q2d(enc->time_base) : NAN;
1079         if (ost->forced_kf_index < ost->forced_kf_count &&
1080             in_picture->pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1081             ost->forced_kf_index++;
1082             forced_keyframe = 1;
1083         } else if (ost->forced_keyframes_pexpr) {
1084             double res;
1085             ost->forced_keyframes_expr_const_values[FKF_T] = pts_time;
1086             res = av_expr_eval(ost->forced_keyframes_pexpr,
1087                                ost->forced_keyframes_expr_const_values, NULL);
1088             av_dlog(NULL, "force_key_frame: n:%f n_forced:%f prev_forced_n:%f t:%f prev_forced_t:%f -> res:%f\n",
1089                     ost->forced_keyframes_expr_const_values[FKF_N],
1090                     ost->forced_keyframes_expr_const_values[FKF_N_FORCED],
1091                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N],
1092                     ost->forced_keyframes_expr_const_values[FKF_T],
1093                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T],
1094                     res);
1095             if (res) {
1096                 forced_keyframe = 1;
1097                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] =
1098                     ost->forced_keyframes_expr_const_values[FKF_N];
1099                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] =
1100                     ost->forced_keyframes_expr_const_values[FKF_T];
1101                 ost->forced_keyframes_expr_const_values[FKF_N_FORCED] += 1;
1102             }
1103
1104             ost->forced_keyframes_expr_const_values[FKF_N] += 1;
1105         }
1106
1107         if (forced_keyframe) {
1108             in_picture->pict_type = AV_PICTURE_TYPE_I;
1109             av_log(NULL, AV_LOG_DEBUG, "Forced keyframe at time %f\n", pts_time);
1110         }
1111
1112         update_benchmark(NULL);
1113         if (debug_ts) {
1114             av_log(NULL, AV_LOG_INFO, "encoder <- type:video "
1115                    "frame_pts:%s frame_pts_time:%s time_base:%d/%d\n",
1116                    av_ts2str(in_picture->pts), av_ts2timestr(in_picture->pts, &enc->time_base),
1117                    enc->time_base.num, enc->time_base.den);
1118         }
1119
1120         ost->frames_encoded++;
1121
1122         ret = avcodec_encode_video2(enc, &pkt, in_picture, &got_packet);
1123         update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
1124         if (ret < 0) {
1125             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1126             exit_program(1);
1127         }
1128
1129         if (got_packet) {
1130             if (debug_ts) {
1131                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1132                        "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1133                        av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &enc->time_base),
1134                        av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &enc->time_base));
1135             }
1136
1137             if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
1138                 pkt.pts = ost->sync_opts;
1139
1140             av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
1141
1142             if (debug_ts) {
1143                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1144                     "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1145                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1146                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1147             }
1148
1149             frame_size = pkt.size;
1150             write_frame(s, &pkt, ost);
1151
1152             /* if two pass, output log */
1153             if (ost->logfile && enc->stats_out) {
1154                 fprintf(ost->logfile, "%s", enc->stats_out);
1155             }
1156         }
1157     }
1158     ost->sync_opts++;
1159     /*
1160      * For video, number of frames in == number of packets out.
1161      * But there may be reordering, so we can't throw away frames on encoder
1162      * flush, we need to limit them here, before they go into encoder.
1163      */
1164     ost->frame_number++;
1165
1166     if (vstats_filename && frame_size)
1167         do_video_stats(ost, frame_size);
1168   }
1169
1170     if (!ost->last_frame)
1171         ost->last_frame = av_frame_alloc();
1172     av_frame_unref(ost->last_frame);
1173     if (next_picture)
1174         av_frame_ref(ost->last_frame, next_picture);
1175 }
1176
1177 static double psnr(double d)
1178 {
1179     return -10.0 * log(d) / log(10.0);
1180 }
1181
1182 static void do_video_stats(OutputStream *ost, int frame_size)
1183 {
1184     AVCodecContext *enc;
1185     int frame_number;
1186     double ti1, bitrate, avg_bitrate;
1187
1188     /* this is executed just the first time do_video_stats is called */
1189     if (!vstats_file) {
1190         vstats_file = fopen(vstats_filename, "w");
1191         if (!vstats_file) {
1192             perror("fopen");
1193             exit_program(1);
1194         }
1195     }
1196
1197     enc = ost->enc_ctx;
1198     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1199         frame_number = ost->st->nb_frames;
1200         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame ? enc->coded_frame->quality / (float)FF_QP2LAMBDA : 0);
1201         if (enc->coded_frame && (enc->flags&CODEC_FLAG_PSNR))
1202             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1203
1204         fprintf(vstats_file,"f_size= %6d ", frame_size);
1205         /* compute pts value */
1206         ti1 = av_stream_get_end_pts(ost->st) * av_q2d(ost->st->time_base);
1207         if (ti1 < 0.01)
1208             ti1 = 0.01;
1209
1210         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1211         avg_bitrate = (double)(ost->data_size * 8) / ti1 / 1000.0;
1212         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1213                (double)ost->data_size / 1024, ti1, bitrate, avg_bitrate);
1214         fprintf(vstats_file, "type= %c\n", enc->coded_frame ? av_get_picture_type_char(enc->coded_frame->pict_type) : 'I');
1215     }
1216 }
1217
1218 static void finish_output_stream(OutputStream *ost)
1219 {
1220     OutputFile *of = output_files[ost->file_index];
1221     int i;
1222
1223     ost->finished = ENCODER_FINISHED | MUXER_FINISHED;
1224
1225     if (of->shortest) {
1226         for (i = 0; i < of->ctx->nb_streams; i++)
1227             output_streams[of->ost_index + i]->finished = ENCODER_FINISHED | MUXER_FINISHED;
1228     }
1229 }
1230
1231 /**
1232  * Get and encode new output from any of the filtergraphs, without causing
1233  * activity.
1234  *
1235  * @return  0 for success, <0 for severe errors
1236  */
1237 static int reap_filters(int flush)
1238 {
1239     AVFrame *filtered_frame = NULL;
1240     int i;
1241
1242     /* Reap all buffers present in the buffer sinks */
1243     for (i = 0; i < nb_output_streams; i++) {
1244         OutputStream *ost = output_streams[i];
1245         OutputFile    *of = output_files[ost->file_index];
1246         AVFilterContext *filter;
1247         AVCodecContext *enc = ost->enc_ctx;
1248         int ret = 0;
1249
1250         if (!ost->filter)
1251             continue;
1252         filter = ost->filter->filter;
1253
1254         if (!ost->filtered_frame && !(ost->filtered_frame = av_frame_alloc())) {
1255             return AVERROR(ENOMEM);
1256         }
1257         filtered_frame = ost->filtered_frame;
1258
1259         while (1) {
1260             double float_pts = AV_NOPTS_VALUE; // this is identical to filtered_frame.pts but with higher precision
1261             ret = av_buffersink_get_frame_flags(filter, filtered_frame,
1262                                                AV_BUFFERSINK_FLAG_NO_REQUEST);
1263             if (ret < 0) {
1264                 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1265                     av_log(NULL, AV_LOG_WARNING,
1266                            "Error in av_buffersink_get_frame_flags(): %s\n", av_err2str(ret));
1267                 } else if (flush) {
1268                     if (filter->inputs[0]->type == AVMEDIA_TYPE_VIDEO)
1269                         do_video_out(of->ctx, ost, NULL, AV_NOPTS_VALUE);
1270                 }
1271                 break;
1272             }
1273             if (ost->finished) {
1274                 av_frame_unref(filtered_frame);
1275                 continue;
1276             }
1277             if (filtered_frame->pts != AV_NOPTS_VALUE) {
1278                 int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1279                 AVRational tb = enc->time_base;
1280                 int extra_bits = av_clip(29 - av_log2(tb.den), 0, 16);
1281
1282                 tb.den <<= extra_bits;
1283                 float_pts =
1284                     av_rescale_q(filtered_frame->pts, filter->inputs[0]->time_base, tb) -
1285                     av_rescale_q(start_time, AV_TIME_BASE_Q, tb);
1286                 float_pts /= 1 << extra_bits;
1287                 // 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
1288                 float_pts += FFSIGN(float_pts) * 1.0 / (1<<17);
1289
1290                 filtered_frame->pts =
1291                     av_rescale_q(filtered_frame->pts, filter->inputs[0]->time_base, enc->time_base) -
1292                     av_rescale_q(start_time, AV_TIME_BASE_Q, enc->time_base);
1293             }
1294             //if (ost->source_index >= 0)
1295             //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1296
1297             switch (filter->inputs[0]->type) {
1298             case AVMEDIA_TYPE_VIDEO:
1299                 if (!ost->frame_aspect_ratio.num)
1300                     enc->sample_aspect_ratio = filtered_frame->sample_aspect_ratio;
1301
1302                 if (debug_ts) {
1303                     av_log(NULL, AV_LOG_INFO, "filter -> pts:%s pts_time:%s exact:%f time_base:%d/%d\n",
1304                             av_ts2str(filtered_frame->pts), av_ts2timestr(filtered_frame->pts, &enc->time_base),
1305                             float_pts,
1306                             enc->time_base.num, enc->time_base.den);
1307                 }
1308
1309                 do_video_out(of->ctx, ost, filtered_frame, float_pts);
1310                 break;
1311             case AVMEDIA_TYPE_AUDIO:
1312                 if (!(enc->codec->capabilities & CODEC_CAP_PARAM_CHANGE) &&
1313                     enc->channels != av_frame_get_channels(filtered_frame)) {
1314                     av_log(NULL, AV_LOG_ERROR,
1315                            "Audio filter graph output is not normalized and encoder does not support parameter changes\n");
1316                     break;
1317                 }
1318                 do_audio_out(of->ctx, ost, filtered_frame);
1319                 break;
1320             default:
1321                 // TODO support subtitle filters
1322                 av_assert0(0);
1323             }
1324
1325             av_frame_unref(filtered_frame);
1326         }
1327     }
1328
1329     return 0;
1330 }
1331
1332 static void print_final_stats(int64_t total_size)
1333 {
1334     uint64_t video_size = 0, audio_size = 0, extra_size = 0, other_size = 0;
1335     uint64_t subtitle_size = 0;
1336     uint64_t data_size = 0;
1337     float percent = -1.0;
1338     int i, j;
1339
1340     for (i = 0; i < nb_output_streams; i++) {
1341         OutputStream *ost = output_streams[i];
1342         switch (ost->enc_ctx->codec_type) {
1343             case AVMEDIA_TYPE_VIDEO: video_size += ost->data_size; break;
1344             case AVMEDIA_TYPE_AUDIO: audio_size += ost->data_size; break;
1345             case AVMEDIA_TYPE_SUBTITLE: subtitle_size += ost->data_size; break;
1346             default:                 other_size += ost->data_size; break;
1347         }
1348         extra_size += ost->enc_ctx->extradata_size;
1349         data_size  += ost->data_size;
1350     }
1351
1352     if (data_size && total_size>0 && total_size >= data_size)
1353         percent = 100.0 * (total_size - data_size) / data_size;
1354
1355     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: ",
1356            video_size / 1024.0,
1357            audio_size / 1024.0,
1358            subtitle_size / 1024.0,
1359            other_size / 1024.0,
1360            extra_size / 1024.0);
1361     if (percent >= 0.0)
1362         av_log(NULL, AV_LOG_INFO, "%f%%", percent);
1363     else
1364         av_log(NULL, AV_LOG_INFO, "unknown");
1365     av_log(NULL, AV_LOG_INFO, "\n");
1366
1367     /* print verbose per-stream stats */
1368     for (i = 0; i < nb_input_files; i++) {
1369         InputFile *f = input_files[i];
1370         uint64_t total_packets = 0, total_size = 0;
1371
1372         av_log(NULL, AV_LOG_VERBOSE, "Input file #%d (%s):\n",
1373                i, f->ctx->filename);
1374
1375         for (j = 0; j < f->nb_streams; j++) {
1376             InputStream *ist = input_streams[f->ist_index + j];
1377             enum AVMediaType type = ist->dec_ctx->codec_type;
1378
1379             total_size    += ist->data_size;
1380             total_packets += ist->nb_packets;
1381
1382             av_log(NULL, AV_LOG_VERBOSE, "  Input stream #%d:%d (%s): ",
1383                    i, j, media_type_string(type));
1384             av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" packets read (%"PRIu64" bytes); ",
1385                    ist->nb_packets, ist->data_size);
1386
1387             if (ist->decoding_needed) {
1388                 av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" frames decoded",
1389                        ist->frames_decoded);
1390                 if (type == AVMEDIA_TYPE_AUDIO)
1391                     av_log(NULL, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ist->samples_decoded);
1392                 av_log(NULL, AV_LOG_VERBOSE, "; ");
1393             }
1394
1395             av_log(NULL, AV_LOG_VERBOSE, "\n");
1396         }
1397
1398         av_log(NULL, AV_LOG_VERBOSE, "  Total: %"PRIu64" packets (%"PRIu64" bytes) demuxed\n",
1399                total_packets, total_size);
1400     }
1401
1402     for (i = 0; i < nb_output_files; i++) {
1403         OutputFile *of = output_files[i];
1404         uint64_t total_packets = 0, total_size = 0;
1405
1406         av_log(NULL, AV_LOG_VERBOSE, "Output file #%d (%s):\n",
1407                i, of->ctx->filename);
1408
1409         for (j = 0; j < of->ctx->nb_streams; j++) {
1410             OutputStream *ost = output_streams[of->ost_index + j];
1411             enum AVMediaType type = ost->enc_ctx->codec_type;
1412
1413             total_size    += ost->data_size;
1414             total_packets += ost->packets_written;
1415
1416             av_log(NULL, AV_LOG_VERBOSE, "  Output stream #%d:%d (%s): ",
1417                    i, j, media_type_string(type));
1418             if (ost->encoding_needed) {
1419                 av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" frames encoded",
1420                        ost->frames_encoded);
1421                 if (type == AVMEDIA_TYPE_AUDIO)
1422                     av_log(NULL, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ost->samples_encoded);
1423                 av_log(NULL, AV_LOG_VERBOSE, "; ");
1424             }
1425
1426             av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" packets muxed (%"PRIu64" bytes); ",
1427                    ost->packets_written, ost->data_size);
1428
1429             av_log(NULL, AV_LOG_VERBOSE, "\n");
1430         }
1431
1432         av_log(NULL, AV_LOG_VERBOSE, "  Total: %"PRIu64" packets (%"PRIu64" bytes) muxed\n",
1433                total_packets, total_size);
1434     }
1435     if(video_size + data_size + audio_size + subtitle_size + extra_size == 0){
1436         av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
1437     }
1438 }
1439
1440 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
1441 {
1442     char buf[1024];
1443     AVBPrint buf_script;
1444     OutputStream *ost;
1445     AVFormatContext *oc;
1446     int64_t total_size;
1447     AVCodecContext *enc;
1448     int frame_number, vid, i;
1449     double bitrate;
1450     int64_t pts = INT64_MIN;
1451     static int64_t last_time = -1;
1452     static int qp_histogram[52];
1453     int hours, mins, secs, us;
1454
1455     if (!print_stats && !is_last_report && !progress_avio)
1456         return;
1457
1458     if (!is_last_report) {
1459         if (last_time == -1) {
1460             last_time = cur_time;
1461             return;
1462         }
1463         if ((cur_time - last_time) < 500000)
1464             return;
1465         last_time = cur_time;
1466     }
1467
1468
1469     oc = output_files[0]->ctx;
1470
1471     total_size = avio_size(oc->pb);
1472     if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
1473         total_size = avio_tell(oc->pb);
1474
1475     buf[0] = '\0';
1476     vid = 0;
1477     av_bprint_init(&buf_script, 0, 1);
1478     for (i = 0; i < nb_output_streams; i++) {
1479         float q = -1;
1480         ost = output_streams[i];
1481         enc = ost->enc_ctx;
1482         if (!ost->stream_copy && enc->coded_frame)
1483             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1484         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1485             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1486             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1487                        ost->file_index, ost->index, q);
1488         }
1489         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1490             float fps, t = (cur_time-timer_start) / 1000000.0;
1491
1492             frame_number = ost->frame_number;
1493             fps = t > 1 ? frame_number / t : 0;
1494             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
1495                      frame_number, fps < 9.95, fps, q);
1496             av_bprintf(&buf_script, "frame=%d\n", frame_number);
1497             av_bprintf(&buf_script, "fps=%.1f\n", fps);
1498             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1499                        ost->file_index, ost->index, q);
1500             if (is_last_report)
1501                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1502             if (qp_hist) {
1503                 int j;
1504                 int qp = lrintf(q);
1505                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1506                     qp_histogram[qp]++;
1507                 for (j = 0; j < 32; j++)
1508                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
1509             }
1510             if ((enc->flags&CODEC_FLAG_PSNR) && (enc->coded_frame || is_last_report)) {
1511                 int j;
1512                 double error, error_sum = 0;
1513                 double scale, scale_sum = 0;
1514                 double p;
1515                 char type[3] = { 'Y','U','V' };
1516                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1517                 for (j = 0; j < 3; j++) {
1518                     if (is_last_report) {
1519                         error = enc->error[j];
1520                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1521                     } else {
1522                         error = enc->coded_frame->error[j];
1523                         scale = enc->width * enc->height * 255.0 * 255.0;
1524                     }
1525                     if (j)
1526                         scale /= 4;
1527                     error_sum += error;
1528                     scale_sum += scale;
1529                     p = psnr(error / scale);
1530                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], p);
1531                     av_bprintf(&buf_script, "stream_%d_%d_psnr_%c=%2.2f\n",
1532                                ost->file_index, ost->index, type[j] | 32, p);
1533                 }
1534                 p = psnr(error_sum / scale_sum);
1535                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1536                 av_bprintf(&buf_script, "stream_%d_%d_psnr_all=%2.2f\n",
1537                            ost->file_index, ost->index, p);
1538             }
1539             vid = 1;
1540         }
1541         /* compute min output value */
1542         if (av_stream_get_end_pts(ost->st) != AV_NOPTS_VALUE)
1543             pts = FFMAX(pts, av_rescale_q(av_stream_get_end_pts(ost->st),
1544                                           ost->st->time_base, AV_TIME_BASE_Q));
1545         if (is_last_report)
1546             nb_frames_drop += ost->last_droped;
1547     }
1548
1549     secs = FFABS(pts) / AV_TIME_BASE;
1550     us = FFABS(pts) % AV_TIME_BASE;
1551     mins = secs / 60;
1552     secs %= 60;
1553     hours = mins / 60;
1554     mins %= 60;
1555
1556     bitrate = pts && total_size >= 0 ? total_size * 8 / (pts / 1000.0) : -1;
1557
1558     if (total_size < 0) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1559                                  "size=N/A time=");
1560     else                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1561                                  "size=%8.0fkB time=", total_size / 1024.0);
1562     if (pts < 0)
1563         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "-");
1564     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1565              "%02d:%02d:%02d.%02d ", hours, mins, secs,
1566              (100 * us) / AV_TIME_BASE);
1567
1568     if (bitrate < 0) {
1569         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),"bitrate=N/A");
1570         av_bprintf(&buf_script, "bitrate=N/A\n");
1571     }else{
1572         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),"bitrate=%6.1fkbits/s", bitrate);
1573         av_bprintf(&buf_script, "bitrate=%6.1fkbits/s\n", bitrate);
1574     }
1575
1576     if (total_size < 0) av_bprintf(&buf_script, "total_size=N/A\n");
1577     else                av_bprintf(&buf_script, "total_size=%"PRId64"\n", total_size);
1578     av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
1579     av_bprintf(&buf_script, "out_time=%02d:%02d:%02d.%06d\n",
1580                hours, mins, secs, us);
1581
1582     if (nb_frames_dup || nb_frames_drop)
1583         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1584                 nb_frames_dup, nb_frames_drop);
1585     av_bprintf(&buf_script, "dup_frames=%d\n", nb_frames_dup);
1586     av_bprintf(&buf_script, "drop_frames=%d\n", nb_frames_drop);
1587
1588     if (print_stats || is_last_report) {
1589         const char end = is_last_report ? '\n' : '\r';
1590         if (print_stats==1 && AV_LOG_INFO > av_log_get_level()) {
1591             fprintf(stderr, "%s    %c", buf, end);
1592         } else
1593             av_log(NULL, AV_LOG_INFO, "%s    %c", buf, end);
1594
1595     fflush(stderr);
1596     }
1597
1598     if (progress_avio) {
1599         av_bprintf(&buf_script, "progress=%s\n",
1600                    is_last_report ? "end" : "continue");
1601         avio_write(progress_avio, buf_script.str,
1602                    FFMIN(buf_script.len, buf_script.size - 1));
1603         avio_flush(progress_avio);
1604         av_bprint_finalize(&buf_script, NULL);
1605         if (is_last_report) {
1606             avio_closep(&progress_avio);
1607         }
1608     }
1609
1610     if (is_last_report)
1611         print_final_stats(total_size);
1612 }
1613
1614 static void flush_encoders(void)
1615 {
1616     int i, ret;
1617
1618     for (i = 0; i < nb_output_streams; i++) {
1619         OutputStream   *ost = output_streams[i];
1620         AVCodecContext *enc = ost->enc_ctx;
1621         AVFormatContext *os = output_files[ost->file_index]->ctx;
1622         int stop_encoding = 0;
1623
1624         if (!ost->encoding_needed)
1625             continue;
1626
1627         if (enc->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1628             continue;
1629         if (enc->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
1630             continue;
1631
1632         for (;;) {
1633             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1634             const char *desc;
1635
1636             switch (enc->codec_type) {
1637             case AVMEDIA_TYPE_AUDIO:
1638                 encode = avcodec_encode_audio2;
1639                 desc   = "Audio";
1640                 break;
1641             case AVMEDIA_TYPE_VIDEO:
1642                 encode = avcodec_encode_video2;
1643                 desc   = "Video";
1644                 break;
1645             default:
1646                 stop_encoding = 1;
1647             }
1648
1649             if (encode) {
1650                 AVPacket pkt;
1651                 int pkt_size;
1652                 int got_packet;
1653                 av_init_packet(&pkt);
1654                 pkt.data = NULL;
1655                 pkt.size = 0;
1656
1657                 update_benchmark(NULL);
1658                 ret = encode(enc, &pkt, NULL, &got_packet);
1659                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
1660                 if (ret < 0) {
1661                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1662                     exit_program(1);
1663                 }
1664                 if (ost->logfile && enc->stats_out) {
1665                     fprintf(ost->logfile, "%s", enc->stats_out);
1666                 }
1667                 if (!got_packet) {
1668                     stop_encoding = 1;
1669                     break;
1670                 }
1671                 if (ost->finished & MUXER_FINISHED) {
1672                     av_free_packet(&pkt);
1673                     continue;
1674                 }
1675                 av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
1676                 pkt_size = pkt.size;
1677                 write_frame(os, &pkt, ost);
1678                 if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO && vstats_filename) {
1679                     do_video_stats(ost, pkt_size);
1680                 }
1681             }
1682
1683             if (stop_encoding)
1684                 break;
1685         }
1686     }
1687 }
1688
1689 /*
1690  * Check whether a packet from ist should be written into ost at this time
1691  */
1692 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1693 {
1694     OutputFile *of = output_files[ost->file_index];
1695     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1696
1697     if (ost->source_index != ist_index)
1698         return 0;
1699
1700     if (ost->finished)
1701         return 0;
1702
1703     if (of->start_time != AV_NOPTS_VALUE && ist->pts < of->start_time)
1704         return 0;
1705
1706     return 1;
1707 }
1708
1709 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1710 {
1711     OutputFile *of = output_files[ost->file_index];
1712     InputFile   *f = input_files [ist->file_index];
1713     int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1714     int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);
1715     int64_t ist_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ist->st->time_base);
1716     AVPicture pict;
1717     AVPacket opkt;
1718
1719     av_init_packet(&opkt);
1720
1721     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1722         !ost->copy_initial_nonkeyframes)
1723         return;
1724
1725     if (pkt->pts == AV_NOPTS_VALUE) {
1726         if (!ost->frame_number && ist->pts < start_time &&
1727             !ost->copy_prior_start)
1728             return;
1729     } else {
1730         if (!ost->frame_number && pkt->pts < ist_tb_start_time &&
1731             !ost->copy_prior_start)
1732             return;
1733     }
1734
1735     if (of->recording_time != INT64_MAX &&
1736         ist->pts >= of->recording_time + start_time) {
1737         close_output_stream(ost);
1738         return;
1739     }
1740
1741     if (f->recording_time != INT64_MAX) {
1742         start_time = f->ctx->start_time;
1743         if (f->start_time != AV_NOPTS_VALUE)
1744             start_time += f->start_time;
1745         if (ist->pts >= f->recording_time + start_time) {
1746             close_output_stream(ost);
1747             return;
1748         }
1749     }
1750
1751     /* force the input stream PTS */
1752     if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO)
1753         ost->sync_opts++;
1754
1755     if (pkt->pts != AV_NOPTS_VALUE)
1756         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1757     else
1758         opkt.pts = AV_NOPTS_VALUE;
1759
1760     if (pkt->dts == AV_NOPTS_VALUE)
1761         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
1762     else
1763         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1764     opkt.dts -= ost_tb_start_time;
1765
1766     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1767         int duration = av_get_audio_frame_duration(ist->dec_ctx, pkt->size);
1768         if(!duration)
1769             duration = ist->dec_ctx->frame_size;
1770         opkt.dts = opkt.pts = av_rescale_delta(ist->st->time_base, pkt->dts,
1771                                                (AVRational){1, ist->dec_ctx->sample_rate}, duration, &ist->filter_in_rescale_delta_last,
1772                                                ost->st->time_base) - ost_tb_start_time;
1773     }
1774
1775     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1776     opkt.flags    = pkt->flags;
1777
1778     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1779     if (  ost->enc_ctx->codec_id != AV_CODEC_ID_H264
1780        && ost->enc_ctx->codec_id != AV_CODEC_ID_MPEG1VIDEO
1781        && ost->enc_ctx->codec_id != AV_CODEC_ID_MPEG2VIDEO
1782        && ost->enc_ctx->codec_id != AV_CODEC_ID_VC1
1783        ) {
1784         if (av_parser_change(ost->parser, ost->st->codec,
1785                              &opkt.data, &opkt.size,
1786                              pkt->data, pkt->size,
1787                              pkt->flags & AV_PKT_FLAG_KEY)) {
1788             opkt.buf = av_buffer_create(opkt.data, opkt.size, av_buffer_default_free, NULL, 0);
1789             if (!opkt.buf)
1790                 exit_program(1);
1791         }
1792     } else {
1793         opkt.data = pkt->data;
1794         opkt.size = pkt->size;
1795     }
1796     av_copy_packet_side_data(&opkt, pkt);
1797
1798     if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (of->ctx->oformat->flags & AVFMT_RAWPICTURE)) {
1799         /* store AVPicture in AVPacket, as expected by the output format */
1800         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
1801         opkt.data = (uint8_t *)&pict;
1802         opkt.size = sizeof(AVPicture);
1803         opkt.flags |= AV_PKT_FLAG_KEY;
1804     }
1805
1806     write_frame(of->ctx, &opkt, ost);
1807 }
1808
1809 int guess_input_channel_layout(InputStream *ist)
1810 {
1811     AVCodecContext *dec = ist->dec_ctx;
1812
1813     if (!dec->channel_layout) {
1814         char layout_name[256];
1815
1816         if (dec->channels > ist->guess_layout_max)
1817             return 0;
1818         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1819         if (!dec->channel_layout)
1820             return 0;
1821         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1822                                      dec->channels, dec->channel_layout);
1823         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1824                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1825     }
1826     return 1;
1827 }
1828
1829 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1830 {
1831     AVFrame *decoded_frame, *f;
1832     AVCodecContext *avctx = ist->dec_ctx;
1833     int i, ret, err = 0, resample_changed;
1834     AVRational decoded_frame_tb;
1835
1836     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1837         return AVERROR(ENOMEM);
1838     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1839         return AVERROR(ENOMEM);
1840     decoded_frame = ist->decoded_frame;
1841
1842     update_benchmark(NULL);
1843     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1844     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
1845
1846     if (ret >= 0 && avctx->sample_rate <= 0) {
1847         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
1848         ret = AVERROR_INVALIDDATA;
1849     }
1850
1851     if (*got_output || ret<0 || pkt->size)
1852         decode_error_stat[ret<0] ++;
1853
1854     if (!*got_output || ret < 0) {
1855         if (!pkt->size) {
1856             for (i = 0; i < ist->nb_filters; i++)
1857 #if 1
1858                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1859 #else
1860                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
1861 #endif
1862         }
1863         return ret;
1864     }
1865
1866     ist->samples_decoded += decoded_frame->nb_samples;
1867     ist->frames_decoded++;
1868
1869 #if 1
1870     /* increment next_dts to use for the case where the input stream does not
1871        have timestamps or there are multiple frames in the packet */
1872     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1873                      avctx->sample_rate;
1874     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1875                      avctx->sample_rate;
1876 #endif
1877
1878     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1879                        ist->resample_channels       != avctx->channels               ||
1880                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1881                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1882     if (resample_changed) {
1883         char layout1[64], layout2[64];
1884
1885         if (!guess_input_channel_layout(ist)) {
1886             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1887                    "layout for Input Stream #%d.%d\n", ist->file_index,
1888                    ist->st->index);
1889             exit_program(1);
1890         }
1891         decoded_frame->channel_layout = avctx->channel_layout;
1892
1893         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1894                                      ist->resample_channel_layout);
1895         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1896                                      decoded_frame->channel_layout);
1897
1898         av_log(NULL, AV_LOG_INFO,
1899                "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",
1900                ist->file_index, ist->st->index,
1901                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1902                ist->resample_channels, layout1,
1903                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1904                avctx->channels, layout2);
1905
1906         ist->resample_sample_fmt     = decoded_frame->format;
1907         ist->resample_sample_rate    = decoded_frame->sample_rate;
1908         ist->resample_channel_layout = decoded_frame->channel_layout;
1909         ist->resample_channels       = avctx->channels;
1910
1911         for (i = 0; i < nb_filtergraphs; i++)
1912             if (ist_in_filtergraph(filtergraphs[i], ist)) {
1913                 FilterGraph *fg = filtergraphs[i];
1914                 if (configure_filtergraph(fg) < 0) {
1915                     av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1916                     exit_program(1);
1917                 }
1918             }
1919     }
1920
1921     /* if the decoder provides a pts, use it instead of the last packet pts.
1922        the decoder could be delaying output by a packet or more. */
1923     if (decoded_frame->pts != AV_NOPTS_VALUE) {
1924         ist->dts = ist->next_dts = ist->pts = ist->next_pts = av_rescale_q(decoded_frame->pts, avctx->time_base, AV_TIME_BASE_Q);
1925         decoded_frame_tb   = avctx->time_base;
1926     } else if (decoded_frame->pkt_pts != AV_NOPTS_VALUE) {
1927         decoded_frame->pts = decoded_frame->pkt_pts;
1928         decoded_frame_tb   = ist->st->time_base;
1929     } else if (pkt->pts != AV_NOPTS_VALUE) {
1930         decoded_frame->pts = pkt->pts;
1931         decoded_frame_tb   = ist->st->time_base;
1932     }else {
1933         decoded_frame->pts = ist->dts;
1934         decoded_frame_tb   = AV_TIME_BASE_Q;
1935     }
1936     pkt->pts           = AV_NOPTS_VALUE;
1937     if (decoded_frame->pts != AV_NOPTS_VALUE)
1938         decoded_frame->pts = av_rescale_delta(decoded_frame_tb, decoded_frame->pts,
1939                                               (AVRational){1, avctx->sample_rate}, decoded_frame->nb_samples, &ist->filter_in_rescale_delta_last,
1940                                               (AVRational){1, avctx->sample_rate});
1941     for (i = 0; i < ist->nb_filters; i++) {
1942         if (i < ist->nb_filters - 1) {
1943             f = ist->filter_frame;
1944             err = av_frame_ref(f, decoded_frame);
1945             if (err < 0)
1946                 break;
1947         } else
1948             f = decoded_frame;
1949         err = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f,
1950                                      AV_BUFFERSRC_FLAG_PUSH);
1951         if (err == AVERROR_EOF)
1952             err = 0; /* ignore */
1953         if (err < 0)
1954             break;
1955     }
1956     decoded_frame->pts = AV_NOPTS_VALUE;
1957
1958     av_frame_unref(ist->filter_frame);
1959     av_frame_unref(decoded_frame);
1960     return err < 0 ? err : ret;
1961 }
1962
1963 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1964 {
1965     AVFrame *decoded_frame, *f;
1966     int i, ret = 0, err = 0, resample_changed;
1967     int64_t best_effort_timestamp;
1968     AVRational *frame_sample_aspect;
1969
1970     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1971         return AVERROR(ENOMEM);
1972     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1973         return AVERROR(ENOMEM);
1974     decoded_frame = ist->decoded_frame;
1975     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
1976
1977     update_benchmark(NULL);
1978     ret = avcodec_decode_video2(ist->dec_ctx,
1979                                 decoded_frame, got_output, pkt);
1980     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
1981
1982     // The following line may be required in some cases where there is no parser
1983     // or the parser does not has_b_frames correctly
1984     if (ist->st->codec->has_b_frames < ist->dec_ctx->has_b_frames) {
1985         if (ist->dec_ctx->codec_id == AV_CODEC_ID_H264) {
1986             ist->st->codec->has_b_frames = ist->dec_ctx->has_b_frames;
1987         } else
1988             av_log_ask_for_sample(
1989                 ist->dec_ctx,
1990                 "has_b_frames is larger in decoder than demuxer %d > %d ",
1991                 ist->dec_ctx->has_b_frames,
1992                 ist->st->codec->has_b_frames
1993             );
1994     }
1995
1996     if (*got_output || ret<0 || pkt->size)
1997         decode_error_stat[ret<0] ++;
1998
1999     if (*got_output && ret >= 0) {
2000         if (ist->dec_ctx->width  != decoded_frame->width ||
2001             ist->dec_ctx->height != decoded_frame->height ||
2002             ist->dec_ctx->pix_fmt != decoded_frame->format) {
2003             av_log(NULL, AV_LOG_DEBUG, "Frame parameters mismatch context %d,%d,%d != %d,%d,%d\n",
2004                 decoded_frame->width,
2005                 decoded_frame->height,
2006                 decoded_frame->format,
2007                 ist->dec_ctx->width,
2008                 ist->dec_ctx->height,
2009                 ist->dec_ctx->pix_fmt);
2010         }
2011     }
2012
2013     if (!*got_output || ret < 0) {
2014         if (!pkt->size) {
2015             for (i = 0; i < ist->nb_filters; i++)
2016 #if 1
2017                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
2018 #else
2019                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
2020 #endif
2021         }
2022         return ret;
2023     }
2024
2025     if(ist->top_field_first>=0)
2026         decoded_frame->top_field_first = ist->top_field_first;
2027
2028     ist->frames_decoded++;
2029
2030     if (ist->hwaccel_retrieve_data && decoded_frame->format == ist->hwaccel_pix_fmt) {
2031         err = ist->hwaccel_retrieve_data(ist->dec_ctx, decoded_frame);
2032         if (err < 0)
2033             goto fail;
2034     }
2035     ist->hwaccel_retrieved_pix_fmt = decoded_frame->format;
2036
2037     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
2038     if(best_effort_timestamp != AV_NOPTS_VALUE)
2039         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
2040
2041     if (debug_ts) {
2042         av_log(NULL, AV_LOG_INFO, "decoder -> ist_index:%d type:video "
2043                "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",
2044                ist->st->index, av_ts2str(decoded_frame->pts),
2045                av_ts2timestr(decoded_frame->pts, &ist->st->time_base),
2046                best_effort_timestamp,
2047                av_ts2timestr(best_effort_timestamp, &ist->st->time_base),
2048                decoded_frame->key_frame, decoded_frame->pict_type,
2049                ist->st->time_base.num, ist->st->time_base.den);
2050     }
2051
2052     pkt->size = 0;
2053
2054     if (ist->st->sample_aspect_ratio.num)
2055         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2056
2057     resample_changed = ist->resample_width   != decoded_frame->width  ||
2058                        ist->resample_height  != decoded_frame->height ||
2059                        ist->resample_pix_fmt != decoded_frame->format;
2060     if (resample_changed) {
2061         av_log(NULL, AV_LOG_INFO,
2062                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2063                ist->file_index, ist->st->index,
2064                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2065                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2066
2067         ist->resample_width   = decoded_frame->width;
2068         ist->resample_height  = decoded_frame->height;
2069         ist->resample_pix_fmt = decoded_frame->format;
2070
2071         for (i = 0; i < nb_filtergraphs; i++) {
2072             if (ist_in_filtergraph(filtergraphs[i], ist) && ist->reinit_filters &&
2073                 configure_filtergraph(filtergraphs[i]) < 0) {
2074                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2075                 exit_program(1);
2076             }
2077         }
2078     }
2079
2080     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
2081     for (i = 0; i < ist->nb_filters; i++) {
2082         if (!frame_sample_aspect->num)
2083             *frame_sample_aspect = ist->st->sample_aspect_ratio;
2084
2085         if (i < ist->nb_filters - 1) {
2086             f = ist->filter_frame;
2087             err = av_frame_ref(f, decoded_frame);
2088             if (err < 0)
2089                 break;
2090         } else
2091             f = decoded_frame;
2092         ret = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f, AV_BUFFERSRC_FLAG_PUSH);
2093         if (ret == AVERROR_EOF) {
2094             ret = 0; /* ignore */
2095         } else if (ret < 0) {
2096             av_log(NULL, AV_LOG_FATAL,
2097                    "Failed to inject frame into filter network: %s\n", av_err2str(ret));
2098             exit_program(1);
2099         }
2100     }
2101
2102 fail:
2103     av_frame_unref(ist->filter_frame);
2104     av_frame_unref(decoded_frame);
2105     return err < 0 ? err : ret;
2106 }
2107
2108 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2109 {
2110     AVSubtitle subtitle;
2111     int i, ret = avcodec_decode_subtitle2(ist->dec_ctx,
2112                                           &subtitle, got_output, pkt);
2113
2114     if (*got_output || ret<0 || pkt->size)
2115         decode_error_stat[ret<0] ++;
2116
2117     if (ret < 0 || !*got_output) {
2118         if (!pkt->size)
2119             sub2video_flush(ist);
2120         return ret;
2121     }
2122
2123     if (ist->fix_sub_duration) {
2124         int end = 1;
2125         if (ist->prev_sub.got_output) {
2126             end = av_rescale(subtitle.pts - ist->prev_sub.subtitle.pts,
2127                              1000, AV_TIME_BASE);
2128             if (end < ist->prev_sub.subtitle.end_display_time) {
2129                 av_log(ist->dec_ctx, AV_LOG_DEBUG,
2130                        "Subtitle duration reduced from %d to %d%s\n",
2131                        ist->prev_sub.subtitle.end_display_time, end,
2132                        end <= 0 ? ", dropping it" : "");
2133                 ist->prev_sub.subtitle.end_display_time = end;
2134             }
2135         }
2136         FFSWAP(int,        *got_output, ist->prev_sub.got_output);
2137         FFSWAP(int,        ret,         ist->prev_sub.ret);
2138         FFSWAP(AVSubtitle, subtitle,    ist->prev_sub.subtitle);
2139         if (end <= 0)
2140             goto out;
2141     }
2142
2143     if (!*got_output)
2144         return ret;
2145
2146     sub2video_update(ist, &subtitle);
2147
2148     if (!subtitle.num_rects)
2149         goto out;
2150
2151     ist->frames_decoded++;
2152
2153     for (i = 0; i < nb_output_streams; i++) {
2154         OutputStream *ost = output_streams[i];
2155
2156         if (!check_output_constraints(ist, ost) || !ost->encoding_needed
2157             || ost->enc->type != AVMEDIA_TYPE_SUBTITLE)
2158             continue;
2159
2160         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle);
2161     }
2162
2163 out:
2164     avsubtitle_free(&subtitle);
2165     return ret;
2166 }
2167
2168 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2169 static int process_input_packet(InputStream *ist, const AVPacket *pkt)
2170 {
2171     int ret = 0, i;
2172     int got_output = 0;
2173
2174     AVPacket avpkt;
2175     if (!ist->saw_first_ts) {
2176         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;
2177         ist->pts = 0;
2178         if (pkt && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
2179             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2180             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
2181         }
2182         ist->saw_first_ts = 1;
2183     }
2184
2185     if (ist->next_dts == AV_NOPTS_VALUE)
2186         ist->next_dts = ist->dts;
2187     if (ist->next_pts == AV_NOPTS_VALUE)
2188         ist->next_pts = ist->pts;
2189
2190     if (!pkt) {
2191         /* EOF handling */
2192         av_init_packet(&avpkt);
2193         avpkt.data = NULL;
2194         avpkt.size = 0;
2195         goto handle_eof;
2196     } else {
2197         avpkt = *pkt;
2198     }
2199
2200     if (pkt->dts != AV_NOPTS_VALUE) {
2201         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2202         if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
2203             ist->next_pts = ist->pts = ist->dts;
2204     }
2205
2206     // while we have more to decode or while the decoder did output something on EOF
2207     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2208         int duration;
2209     handle_eof:
2210
2211         ist->pts = ist->next_pts;
2212         ist->dts = ist->next_dts;
2213
2214         if (avpkt.size && avpkt.size != pkt->size &&
2215             !(ist->dec->capabilities & CODEC_CAP_SUBFRAMES)) {
2216             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2217                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2218             ist->showed_multi_packet_warning = 1;
2219         }
2220
2221         switch (ist->dec_ctx->codec_type) {
2222         case AVMEDIA_TYPE_AUDIO:
2223             ret = decode_audio    (ist, &avpkt, &got_output);
2224             break;
2225         case AVMEDIA_TYPE_VIDEO:
2226             ret = decode_video    (ist, &avpkt, &got_output);
2227             if (avpkt.duration) {
2228                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2229             } else if(ist->dec_ctx->framerate.num != 0 && ist->dec_ctx->framerate.den != 0) {
2230                 int ticks= av_stream_get_parser(ist->st) ? av_stream_get_parser(ist->st)->repeat_pict+1 : ist->dec_ctx->ticks_per_frame;
2231                 duration = ((int64_t)AV_TIME_BASE *
2232                                 ist->dec_ctx->framerate.den * ticks) /
2233                                 ist->dec_ctx->framerate.num / ist->dec_ctx->ticks_per_frame;
2234             } else
2235                 duration = 0;
2236
2237             if(ist->dts != AV_NOPTS_VALUE && duration) {
2238                 ist->next_dts += duration;
2239             }else
2240                 ist->next_dts = AV_NOPTS_VALUE;
2241
2242             if (got_output)
2243                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
2244             break;
2245         case AVMEDIA_TYPE_SUBTITLE:
2246             ret = transcode_subtitles(ist, &avpkt, &got_output);
2247             break;
2248         default:
2249             return -1;
2250         }
2251
2252         if (ret < 0)
2253             return ret;
2254
2255         avpkt.dts=
2256         avpkt.pts= AV_NOPTS_VALUE;
2257
2258         // touch data and size only if not EOF
2259         if (pkt) {
2260             if(ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO)
2261                 ret = avpkt.size;
2262             avpkt.data += ret;
2263             avpkt.size -= ret;
2264         }
2265         if (!got_output) {
2266             continue;
2267         }
2268         if (got_output && !pkt)
2269             break;
2270     }
2271
2272     /* handle stream copy */
2273     if (!ist->decoding_needed) {
2274         ist->dts = ist->next_dts;
2275         switch (ist->dec_ctx->codec_type) {
2276         case AVMEDIA_TYPE_AUDIO:
2277             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->dec_ctx->frame_size) /
2278                              ist->dec_ctx->sample_rate;
2279             break;
2280         case AVMEDIA_TYPE_VIDEO:
2281             if (ist->framerate.num) {
2282                 // TODO: Remove work-around for c99-to-c89 issue 7
2283                 AVRational time_base_q = AV_TIME_BASE_Q;
2284                 int64_t next_dts = av_rescale_q(ist->next_dts, time_base_q, av_inv_q(ist->framerate));
2285                 ist->next_dts = av_rescale_q(next_dts + 1, av_inv_q(ist->framerate), time_base_q);
2286             } else if (pkt->duration) {
2287                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2288             } else if(ist->dec_ctx->framerate.num != 0) {
2289                 int ticks= av_stream_get_parser(ist->st) ? av_stream_get_parser(ist->st)->repeat_pict + 1 : ist->dec_ctx->ticks_per_frame;
2290                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2291                                   ist->dec_ctx->framerate.den * ticks) /
2292                                   ist->dec_ctx->framerate.num / ist->dec_ctx->ticks_per_frame;
2293             }
2294             break;
2295         }
2296         ist->pts = ist->dts;
2297         ist->next_pts = ist->next_dts;
2298     }
2299     for (i = 0; pkt && i < nb_output_streams; i++) {
2300         OutputStream *ost = output_streams[i];
2301
2302         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2303             continue;
2304
2305         do_streamcopy(ist, ost, pkt);
2306     }
2307
2308     return got_output;
2309 }
2310
2311 static void print_sdp(void)
2312 {
2313     char sdp[16384];
2314     int i;
2315     int j;
2316     AVIOContext *sdp_pb;
2317     AVFormatContext **avc = av_malloc_array(nb_output_files, sizeof(*avc));
2318
2319     if (!avc)
2320         exit_program(1);
2321     for (i = 0, j = 0; i < nb_output_files; i++) {
2322         if (!strcmp(output_files[i]->ctx->oformat->name, "rtp")) {
2323             avc[j] = output_files[i]->ctx;
2324             j++;
2325         }
2326     }
2327
2328     av_sdp_create(avc, j, sdp, sizeof(sdp));
2329
2330     if (!sdp_filename) {
2331         printf("SDP:\n%s\n", sdp);
2332         fflush(stdout);
2333     } else {
2334         if (avio_open2(&sdp_pb, sdp_filename, AVIO_FLAG_WRITE, &int_cb, NULL) < 0) {
2335             av_log(NULL, AV_LOG_ERROR, "Failed to open sdp file '%s'\n", sdp_filename);
2336         } else {
2337             avio_printf(sdp_pb, "SDP:\n%s", sdp);
2338             avio_closep(&sdp_pb);
2339             av_freep(&sdp_filename);
2340         }
2341     }
2342
2343     av_freep(&avc);
2344 }
2345
2346 static const HWAccel *get_hwaccel(enum AVPixelFormat pix_fmt)
2347 {
2348     int i;
2349     for (i = 0; hwaccels[i].name; i++)
2350         if (hwaccels[i].pix_fmt == pix_fmt)
2351             return &hwaccels[i];
2352     return NULL;
2353 }
2354
2355 static enum AVPixelFormat get_format(AVCodecContext *s, const enum AVPixelFormat *pix_fmts)
2356 {
2357     InputStream *ist = s->opaque;
2358     const enum AVPixelFormat *p;
2359     int ret;
2360
2361     for (p = pix_fmts; *p != -1; p++) {
2362         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(*p);
2363         const HWAccel *hwaccel;
2364
2365         if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
2366             break;
2367
2368         hwaccel = get_hwaccel(*p);
2369         if (!hwaccel ||
2370             (ist->active_hwaccel_id && ist->active_hwaccel_id != hwaccel->id) ||
2371             (ist->hwaccel_id != HWACCEL_AUTO && ist->hwaccel_id != hwaccel->id))
2372             continue;
2373
2374         ret = hwaccel->init(s);
2375         if (ret < 0) {
2376             if (ist->hwaccel_id == hwaccel->id) {
2377                 av_log(NULL, AV_LOG_FATAL,
2378                        "%s hwaccel requested for input stream #%d:%d, "
2379                        "but cannot be initialized.\n", hwaccel->name,
2380                        ist->file_index, ist->st->index);
2381                 return AV_PIX_FMT_NONE;
2382             }
2383             continue;
2384         }
2385         ist->active_hwaccel_id = hwaccel->id;
2386         ist->hwaccel_pix_fmt   = *p;
2387         break;
2388     }
2389
2390     return *p;
2391 }
2392
2393 static int get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
2394 {
2395     InputStream *ist = s->opaque;
2396
2397     if (ist->hwaccel_get_buffer && frame->format == ist->hwaccel_pix_fmt)
2398         return ist->hwaccel_get_buffer(s, frame, flags);
2399
2400     return avcodec_default_get_buffer2(s, frame, flags);
2401 }
2402
2403 static int init_input_stream(int ist_index, char *error, int error_len)
2404 {
2405     int ret;
2406     InputStream *ist = input_streams[ist_index];
2407
2408     if (ist->decoding_needed) {
2409         AVCodec *codec = ist->dec;
2410         if (!codec) {
2411             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2412                     avcodec_get_name(ist->dec_ctx->codec_id), ist->file_index, ist->st->index);
2413             return AVERROR(EINVAL);
2414         }
2415
2416         ist->dec_ctx->opaque                = ist;
2417         ist->dec_ctx->get_format            = get_format;
2418         ist->dec_ctx->get_buffer2           = get_buffer;
2419         ist->dec_ctx->thread_safe_callbacks = 1;
2420
2421         av_opt_set_int(ist->dec_ctx, "refcounted_frames", 1, 0);
2422         if (ist->dec_ctx->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
2423            (ist->decoding_needed & DECODING_FOR_OST)) {
2424             av_dict_set(&ist->decoder_opts, "compute_edt", "1", AV_DICT_DONT_OVERWRITE);
2425             if (ist->decoding_needed & DECODING_FOR_FILTER)
2426                 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");
2427         }
2428
2429         if (!av_dict_get(ist->decoder_opts, "threads", NULL, 0))
2430             av_dict_set(&ist->decoder_opts, "threads", "auto", 0);
2431         if ((ret = avcodec_open2(ist->dec_ctx, codec, &ist->decoder_opts)) < 0) {
2432             if (ret == AVERROR_EXPERIMENTAL)
2433                 abort_codec_experimental(codec, 0);
2434
2435             snprintf(error, error_len,
2436                      "Error while opening decoder for input stream "
2437                      "#%d:%d : %s",
2438                      ist->file_index, ist->st->index, av_err2str(ret));
2439             return ret;
2440         }
2441         assert_avoptions(ist->decoder_opts);
2442     }
2443
2444     ist->next_pts = AV_NOPTS_VALUE;
2445     ist->next_dts = AV_NOPTS_VALUE;
2446
2447     return 0;
2448 }
2449
2450 static InputStream *get_input_stream(OutputStream *ost)
2451 {
2452     if (ost->source_index >= 0)
2453         return input_streams[ost->source_index];
2454     return NULL;
2455 }
2456
2457 static int compare_int64(const void *a, const void *b)
2458 {
2459     int64_t va = *(int64_t *)a, vb = *(int64_t *)b;
2460     return va < vb ? -1 : va > vb ? +1 : 0;
2461 }
2462
2463 static void parse_forced_key_frames(char *kf, OutputStream *ost,
2464                                     AVCodecContext *avctx)
2465 {
2466     char *p;
2467     int n = 1, i, size, index = 0;
2468     int64_t t, *pts;
2469
2470     for (p = kf; *p; p++)
2471         if (*p == ',')
2472             n++;
2473     size = n;
2474     pts = av_malloc_array(size, sizeof(*pts));
2475     if (!pts) {
2476         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
2477         exit_program(1);
2478     }
2479
2480     p = kf;
2481     for (i = 0; i < n; i++) {
2482         char *next = strchr(p, ',');
2483
2484         if (next)
2485             *next++ = 0;
2486
2487         if (!memcmp(p, "chapters", 8)) {
2488
2489             AVFormatContext *avf = output_files[ost->file_index]->ctx;
2490             int j;
2491
2492             if (avf->nb_chapters > INT_MAX - size ||
2493                 !(pts = av_realloc_f(pts, size += avf->nb_chapters - 1,
2494                                      sizeof(*pts)))) {
2495                 av_log(NULL, AV_LOG_FATAL,
2496                        "Could not allocate forced key frames array.\n");
2497                 exit_program(1);
2498             }
2499             t = p[8] ? parse_time_or_die("force_key_frames", p + 8, 1) : 0;
2500             t = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2501
2502             for (j = 0; j < avf->nb_chapters; j++) {
2503                 AVChapter *c = avf->chapters[j];
2504                 av_assert1(index < size);
2505                 pts[index++] = av_rescale_q(c->start, c->time_base,
2506                                             avctx->time_base) + t;
2507             }
2508
2509         } else {
2510
2511             t = parse_time_or_die("force_key_frames", p, 1);
2512             av_assert1(index < size);
2513             pts[index++] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2514
2515         }
2516
2517         p = next;
2518     }
2519
2520     av_assert0(index == size);
2521     qsort(pts, size, sizeof(*pts), compare_int64);
2522     ost->forced_kf_count = size;
2523     ost->forced_kf_pts   = pts;
2524 }
2525
2526 static void report_new_stream(int input_index, AVPacket *pkt)
2527 {
2528     InputFile *file = input_files[input_index];
2529     AVStream *st = file->ctx->streams[pkt->stream_index];
2530
2531     if (pkt->stream_index < file->nb_streams_warn)
2532         return;
2533     av_log(file->ctx, AV_LOG_WARNING,
2534            "New %s stream %d:%d at pos:%"PRId64" and DTS:%ss\n",
2535            av_get_media_type_string(st->codec->codec_type),
2536            input_index, pkt->stream_index,
2537            pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
2538     file->nb_streams_warn = pkt->stream_index + 1;
2539 }
2540
2541 static void set_encoder_id(OutputFile *of, OutputStream *ost)
2542 {
2543     AVDictionaryEntry *e;
2544
2545     uint8_t *encoder_string;
2546     int encoder_string_len;
2547     int format_flags = 0;
2548     int codec_flags = 0;
2549
2550     if (av_dict_get(ost->st->metadata, "encoder",  NULL, 0))
2551         return;
2552
2553     e = av_dict_get(of->opts, "fflags", NULL, 0);
2554     if (e) {
2555         const AVOption *o = av_opt_find(of->ctx, "fflags", NULL, 0, 0);
2556         if (!o)
2557             return;
2558         av_opt_eval_flags(of->ctx, o, e->value, &format_flags);
2559     }
2560     e = av_dict_get(ost->encoder_opts, "flags", NULL, 0);
2561     if (e) {
2562         const AVOption *o = av_opt_find(ost->enc_ctx, "flags", NULL, 0, 0);
2563         if (!o)
2564             return;
2565         av_opt_eval_flags(ost->enc_ctx, o, e->value, &codec_flags);
2566     }
2567
2568     encoder_string_len = sizeof(LIBAVCODEC_IDENT) + strlen(ost->enc->name) + 2;
2569     encoder_string     = av_mallocz(encoder_string_len);
2570     if (!encoder_string)
2571         exit_program(1);
2572
2573     if (!(format_flags & AVFMT_FLAG_BITEXACT) && !(codec_flags & CODEC_FLAG_BITEXACT))
2574         av_strlcpy(encoder_string, LIBAVCODEC_IDENT " ", encoder_string_len);
2575     else
2576         av_strlcpy(encoder_string, "Lavc ", encoder_string_len);
2577     av_strlcat(encoder_string, ost->enc->name, encoder_string_len);
2578     av_dict_set(&ost->st->metadata, "encoder",  encoder_string,
2579                 AV_DICT_DONT_STRDUP_VAL | AV_DICT_DONT_OVERWRITE);
2580 }
2581
2582 static int transcode_init(void)
2583 {
2584     int ret = 0, i, j, k;
2585     AVFormatContext *oc;
2586     OutputStream *ost;
2587     InputStream *ist;
2588     char error[1024] = {0};
2589     int want_sdp = 1;
2590
2591     for (i = 0; i < nb_filtergraphs; i++) {
2592         FilterGraph *fg = filtergraphs[i];
2593         for (j = 0; j < fg->nb_outputs; j++) {
2594             OutputFilter *ofilter = fg->outputs[j];
2595             if (!ofilter->ost || ofilter->ost->source_index >= 0)
2596                 continue;
2597             if (fg->nb_inputs != 1)
2598                 continue;
2599             for (k = nb_input_streams-1; k >= 0 ; k--)
2600                 if (fg->inputs[0]->ist == input_streams[k])
2601                     break;
2602             ofilter->ost->source_index = k;
2603         }
2604     }
2605
2606     /* init framerate emulation */
2607     for (i = 0; i < nb_input_files; i++) {
2608         InputFile *ifile = input_files[i];
2609         if (ifile->rate_emu)
2610             for (j = 0; j < ifile->nb_streams; j++)
2611                 input_streams[j + ifile->ist_index]->start = av_gettime_relative();
2612     }
2613
2614     /* output stream init */
2615     for (i = 0; i < nb_output_files; i++) {
2616         oc = output_files[i]->ctx;
2617         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2618             av_dump_format(oc, i, oc->filename, 1);
2619             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2620             return AVERROR(EINVAL);
2621         }
2622     }
2623
2624     /* init complex filtergraphs */
2625     for (i = 0; i < nb_filtergraphs; i++)
2626         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2627             return ret;
2628
2629     /* for each output stream, we compute the right encoding parameters */
2630     for (i = 0; i < nb_output_streams; i++) {
2631         AVCodecContext *enc_ctx;
2632         AVCodecContext *dec_ctx = NULL;
2633         ost = output_streams[i];
2634         oc  = output_files[ost->file_index]->ctx;
2635         ist = get_input_stream(ost);
2636
2637         if (ost->attachment_filename)
2638             continue;
2639
2640         enc_ctx = ost->stream_copy ? ost->st->codec : ost->enc_ctx;
2641
2642         if (ist) {
2643             dec_ctx = ist->dec_ctx;
2644
2645             ost->st->disposition          = ist->st->disposition;
2646             enc_ctx->bits_per_raw_sample    = dec_ctx->bits_per_raw_sample;
2647             enc_ctx->chroma_sample_location = dec_ctx->chroma_sample_location;
2648         } else {
2649             for (j=0; j<oc->nb_streams; j++) {
2650                 AVStream *st = oc->streams[j];
2651                 if (st != ost->st && st->codec->codec_type == enc_ctx->codec_type)
2652                     break;
2653             }
2654             if (j == oc->nb_streams)
2655                 if (enc_ctx->codec_type == AVMEDIA_TYPE_AUDIO || enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO)
2656                     ost->st->disposition = AV_DISPOSITION_DEFAULT;
2657         }
2658
2659         if (ost->stream_copy) {
2660             AVRational sar;
2661             uint64_t extra_size;
2662
2663             av_assert0(ist && !ost->filter);
2664
2665             extra_size = (uint64_t)dec_ctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2666
2667             if (extra_size > INT_MAX) {
2668                 return AVERROR(EINVAL);
2669             }
2670
2671             /* if stream_copy is selected, no need to decode or encode */
2672             enc_ctx->codec_id   = dec_ctx->codec_id;
2673             enc_ctx->codec_type = dec_ctx->codec_type;
2674
2675             if (!enc_ctx->codec_tag) {
2676                 unsigned int codec_tag;
2677                 if (!oc->oformat->codec_tag ||
2678                      av_codec_get_id (oc->oformat->codec_tag, dec_ctx->codec_tag) == enc_ctx->codec_id ||
2679                      !av_codec_get_tag2(oc->oformat->codec_tag, dec_ctx->codec_id, &codec_tag))
2680                     enc_ctx->codec_tag = dec_ctx->codec_tag;
2681             }
2682
2683             enc_ctx->bit_rate       = dec_ctx->bit_rate;
2684             enc_ctx->rc_max_rate    = dec_ctx->rc_max_rate;
2685             enc_ctx->rc_buffer_size = dec_ctx->rc_buffer_size;
2686             enc_ctx->field_order    = dec_ctx->field_order;
2687             if (dec_ctx->extradata_size) {
2688                 enc_ctx->extradata      = av_mallocz(extra_size);
2689                 if (!enc_ctx->extradata) {
2690                     return AVERROR(ENOMEM);
2691                 }
2692                 memcpy(enc_ctx->extradata, dec_ctx->extradata, dec_ctx->extradata_size);
2693             }
2694             enc_ctx->extradata_size= dec_ctx->extradata_size;
2695             enc_ctx->bits_per_coded_sample  = dec_ctx->bits_per_coded_sample;
2696
2697             enc_ctx->time_base = ist->st->time_base;
2698             /*
2699              * Avi is a special case here because it supports variable fps but
2700              * having the fps and timebase differe significantly adds quite some
2701              * overhead
2702              */
2703             if(!strcmp(oc->oformat->name, "avi")) {
2704                 if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
2705                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
2706                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(dec_ctx->time_base)
2707                                && av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(dec_ctx->time_base) < 1.0/500
2708                      || copy_tb==2){
2709                     enc_ctx->time_base.num = ist->st->r_frame_rate.den;
2710                     enc_ctx->time_base.den = 2*ist->st->r_frame_rate.num;
2711                     enc_ctx->ticks_per_frame = 2;
2712                 } else if (   copy_tb<0 && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2713                                  && av_q2d(ist->st->time_base) < 1.0/500
2714                     || copy_tb==0){
2715                     enc_ctx->time_base = dec_ctx->time_base;
2716                     enc_ctx->time_base.num *= dec_ctx->ticks_per_frame;
2717                     enc_ctx->time_base.den *= 2;
2718                     enc_ctx->ticks_per_frame = 2;
2719                 }
2720             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2721                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2722                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2723                       && strcmp(oc->oformat->name, "f4v")
2724             ) {
2725                 if(   copy_tb<0 && dec_ctx->time_base.den
2726                                 && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > av_q2d(ist->st->time_base)
2727                                 && av_q2d(ist->st->time_base) < 1.0/500
2728                    || copy_tb==0){
2729                     enc_ctx->time_base = dec_ctx->time_base;
2730                     enc_ctx->time_base.num *= dec_ctx->ticks_per_frame;
2731                 }
2732             }
2733             if (   enc_ctx->codec_tag == AV_RL32("tmcd")
2734                 && dec_ctx->time_base.num < dec_ctx->time_base.den
2735                 && dec_ctx->time_base.num > 0
2736                 && 121LL*dec_ctx->time_base.num > dec_ctx->time_base.den) {
2737                 enc_ctx->time_base = dec_ctx->time_base;
2738             }
2739
2740             if (ist && !ost->frame_rate.num)
2741                 ost->frame_rate = ist->framerate;
2742             if(ost->frame_rate.num)
2743                 enc_ctx->time_base = av_inv_q(ost->frame_rate);
2744
2745             av_reduce(&enc_ctx->time_base.num, &enc_ctx->time_base.den,
2746                         enc_ctx->time_base.num, enc_ctx->time_base.den, INT_MAX);
2747
2748             if (ist->st->nb_side_data) {
2749                 ost->st->side_data = av_realloc_array(NULL, ist->st->nb_side_data,
2750                                                       sizeof(*ist->st->side_data));
2751                 if (!ost->st->side_data)
2752                     return AVERROR(ENOMEM);
2753
2754                 for (j = 0; j < ist->st->nb_side_data; j++) {
2755                     const AVPacketSideData *sd_src = &ist->st->side_data[j];
2756                     AVPacketSideData *sd_dst = &ost->st->side_data[j];
2757
2758                     sd_dst->data = av_malloc(sd_src->size);
2759                     if (!sd_dst->data)
2760                         return AVERROR(ENOMEM);
2761                     memcpy(sd_dst->data, sd_src->data, sd_src->size);
2762                     sd_dst->size = sd_src->size;
2763                     sd_dst->type = sd_src->type;
2764                     ost->st->nb_side_data++;
2765                 }
2766             }
2767
2768             ost->parser = av_parser_init(enc_ctx->codec_id);
2769
2770             switch (enc_ctx->codec_type) {
2771             case AVMEDIA_TYPE_AUDIO:
2772                 if (audio_volume != 256) {
2773                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2774                     exit_program(1);
2775                 }
2776                 enc_ctx->channel_layout     = dec_ctx->channel_layout;
2777                 enc_ctx->sample_rate        = dec_ctx->sample_rate;
2778                 enc_ctx->channels           = dec_ctx->channels;
2779                 enc_ctx->frame_size         = dec_ctx->frame_size;
2780                 enc_ctx->audio_service_type = dec_ctx->audio_service_type;
2781                 enc_ctx->block_align        = dec_ctx->block_align;
2782                 enc_ctx->initial_padding    = dec_ctx->delay;
2783 #if FF_API_AUDIOENC_DELAY
2784                 enc_ctx->delay              = dec_ctx->delay;
2785 #endif
2786                 if((enc_ctx->block_align == 1 || enc_ctx->block_align == 1152 || enc_ctx->block_align == 576) && enc_ctx->codec_id == AV_CODEC_ID_MP3)
2787                     enc_ctx->block_align= 0;
2788                 if(enc_ctx->codec_id == AV_CODEC_ID_AC3)
2789                     enc_ctx->block_align= 0;
2790                 break;
2791             case AVMEDIA_TYPE_VIDEO:
2792                 enc_ctx->pix_fmt            = dec_ctx->pix_fmt;
2793                 enc_ctx->width              = dec_ctx->width;
2794                 enc_ctx->height             = dec_ctx->height;
2795                 enc_ctx->has_b_frames       = dec_ctx->has_b_frames;
2796                 if (ost->frame_aspect_ratio.num) { // overridden by the -aspect cli option
2797                     sar =
2798                         av_mul_q(ost->frame_aspect_ratio,
2799                                  (AVRational){ enc_ctx->height, enc_ctx->width });
2800                     av_log(NULL, AV_LOG_WARNING, "Overriding aspect ratio "
2801                            "with stream copy may produce invalid files\n");
2802                 }
2803                 else if (ist->st->sample_aspect_ratio.num)
2804                     sar = ist->st->sample_aspect_ratio;
2805                 else
2806                     sar = dec_ctx->sample_aspect_ratio;
2807                 ost->st->sample_aspect_ratio = enc_ctx->sample_aspect_ratio = sar;
2808                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2809                 ost->st->r_frame_rate = ist->st->r_frame_rate;
2810                 break;
2811             case AVMEDIA_TYPE_SUBTITLE:
2812                 enc_ctx->width  = dec_ctx->width;
2813                 enc_ctx->height = dec_ctx->height;
2814                 break;
2815             case AVMEDIA_TYPE_DATA:
2816             case AVMEDIA_TYPE_ATTACHMENT:
2817                 break;
2818             default:
2819                 abort();
2820             }
2821         } else {
2822             if (!ost->enc)
2823                 ost->enc = avcodec_find_encoder(enc_ctx->codec_id);
2824             if (!ost->enc) {
2825                 /* should only happen when a default codec is not present. */
2826                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
2827                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
2828                 ret = AVERROR(EINVAL);
2829                 goto dump_format;
2830             }
2831
2832             if (ist)
2833                 ist->decoding_needed |= DECODING_FOR_OST;
2834             ost->encoding_needed = 1;
2835
2836             set_encoder_id(output_files[ost->file_index], ost);
2837
2838             if (!ost->filter &&
2839                 (enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO ||
2840                  enc_ctx->codec_type == AVMEDIA_TYPE_AUDIO)) {
2841                     FilterGraph *fg;
2842                     fg = init_simple_filtergraph(ist, ost);
2843                     if (configure_filtergraph(fg)) {
2844                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2845                         exit_program(1);
2846                     }
2847             }
2848
2849             if (enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
2850                 if (ost->filter && !ost->frame_rate.num)
2851                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
2852                 if (ist && !ost->frame_rate.num)
2853                     ost->frame_rate = ist->framerate;
2854                 if (ist && !ost->frame_rate.num)
2855                     ost->frame_rate = ist->st->r_frame_rate;
2856                 if (ist && !ost->frame_rate.num) {
2857                     ost->frame_rate = (AVRational){25, 1};
2858                     av_log(NULL, AV_LOG_WARNING,
2859                            "No information "
2860                            "about the input framerate is available. Falling "
2861                            "back to a default value of 25fps for output stream #%d:%d. Use the -r option "
2862                            "if you want a different framerate.\n",
2863                            ost->file_index, ost->index);
2864                 }
2865 //                    ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
2866                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2867                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2868                     ost->frame_rate = ost->enc->supported_framerates[idx];
2869                 }
2870                 // reduce frame rate for mpeg4 to be within the spec limits
2871                 if (enc_ctx->codec_id == AV_CODEC_ID_MPEG4) {
2872                     av_reduce(&ost->frame_rate.num, &ost->frame_rate.den,
2873                               ost->frame_rate.num, ost->frame_rate.den, 65535);
2874                 }
2875             }
2876
2877             switch (enc_ctx->codec_type) {
2878             case AVMEDIA_TYPE_AUDIO:
2879                 enc_ctx->sample_fmt     = ost->filter->filter->inputs[0]->format;
2880                 enc_ctx->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2881                 enc_ctx->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2882                 enc_ctx->channels       = avfilter_link_get_channels(ost->filter->filter->inputs[0]);
2883                 enc_ctx->time_base      = (AVRational){ 1, enc_ctx->sample_rate };
2884                 break;
2885             case AVMEDIA_TYPE_VIDEO:
2886                 enc_ctx->time_base = av_inv_q(ost->frame_rate);
2887                 if (ost->filter && !(enc_ctx->time_base.num && enc_ctx->time_base.den))
2888                     enc_ctx->time_base = ost->filter->filter->inputs[0]->time_base;
2889                 if (   av_q2d(enc_ctx->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
2890                    && (video_sync_method == VSYNC_CFR || video_sync_method == VSYNC_VSCFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
2891                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
2892                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
2893                 }
2894                 for (j = 0; j < ost->forced_kf_count; j++)
2895                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
2896                                                          AV_TIME_BASE_Q,
2897                                                          enc_ctx->time_base);
2898
2899                 enc_ctx->width  = ost->filter->filter->inputs[0]->w;
2900                 enc_ctx->height = ost->filter->filter->inputs[0]->h;
2901                 enc_ctx->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2902                     ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option
2903                     av_mul_q(ost->frame_aspect_ratio, (AVRational){ enc_ctx->height, enc_ctx->width }) :
2904                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2905                 if (!strncmp(ost->enc->name, "libx264", 7) &&
2906                     enc_ctx->pix_fmt == AV_PIX_FMT_NONE &&
2907                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2908                     av_log(NULL, AV_LOG_WARNING,
2909                            "No pixel format specified, %s for H.264 encoding chosen.\n"
2910                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2911                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2912                 if (!strncmp(ost->enc->name, "mpeg2video", 10) &&
2913                     enc_ctx->pix_fmt == AV_PIX_FMT_NONE &&
2914                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2915                     av_log(NULL, AV_LOG_WARNING,
2916                            "No pixel format specified, %s for MPEG-2 encoding chosen.\n"
2917                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2918                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2919                 enc_ctx->pix_fmt = ost->filter->filter->inputs[0]->format;
2920
2921                 ost->st->avg_frame_rate = ost->frame_rate;
2922
2923                 if (!dec_ctx ||
2924                     enc_ctx->width   != dec_ctx->width  ||
2925                     enc_ctx->height  != dec_ctx->height ||
2926                     enc_ctx->pix_fmt != dec_ctx->pix_fmt) {
2927                     enc_ctx->bits_per_raw_sample = frame_bits_per_raw_sample;
2928                 }
2929
2930                 if (ost->forced_keyframes) {
2931                     if (!strncmp(ost->forced_keyframes, "expr:", 5)) {
2932                         ret = av_expr_parse(&ost->forced_keyframes_pexpr, ost->forced_keyframes+5,
2933                                             forced_keyframes_const_names, NULL, NULL, NULL, NULL, 0, NULL);
2934                         if (ret < 0) {
2935                             av_log(NULL, AV_LOG_ERROR,
2936                                    "Invalid force_key_frames expression '%s'\n", ost->forced_keyframes+5);
2937                             return ret;
2938                         }
2939                         ost->forced_keyframes_expr_const_values[FKF_N] = 0;
2940                         ost->forced_keyframes_expr_const_values[FKF_N_FORCED] = 0;
2941                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] = NAN;
2942                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] = NAN;
2943                     } else {
2944                         parse_forced_key_frames(ost->forced_keyframes, ost, ost->enc_ctx);
2945                     }
2946                 }
2947                 break;
2948             case AVMEDIA_TYPE_SUBTITLE:
2949                 enc_ctx->time_base = (AVRational){1, 1000};
2950                 if (!enc_ctx->width) {
2951                     enc_ctx->width     = input_streams[ost->source_index]->st->codec->width;
2952                     enc_ctx->height    = input_streams[ost->source_index]->st->codec->height;
2953                 }
2954                 break;
2955             case AVMEDIA_TYPE_DATA:
2956                 break;
2957             default:
2958                 abort();
2959                 break;
2960             }
2961             /* two pass mode */
2962             if (enc_ctx->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
2963                 char logfilename[1024];
2964                 FILE *f;
2965
2966                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2967                          ost->logfile_prefix ? ost->logfile_prefix :
2968                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
2969                          i);
2970                 if (!strcmp(ost->enc->name, "libx264")) {
2971                     av_dict_set(&ost->encoder_opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2972                 } else {
2973                     if (enc_ctx->flags & CODEC_FLAG_PASS2) {
2974                         char  *logbuffer;
2975                         size_t logbuffer_size;
2976                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2977                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2978                                    logfilename);
2979                             exit_program(1);
2980                         }
2981                         enc_ctx->stats_in = logbuffer;
2982                     }
2983                     if (enc_ctx->flags & CODEC_FLAG_PASS1) {
2984                         f = av_fopen_utf8(logfilename, "wb");
2985                         if (!f) {
2986                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2987                                 logfilename, strerror(errno));
2988                             exit_program(1);
2989                         }
2990                         ost->logfile = f;
2991                     }
2992                 }
2993             }
2994         }
2995
2996         if (ost->disposition) {
2997             static const AVOption opts[] = {
2998                 { "disposition"         , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
2999                 { "default"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DEFAULT           },    .unit = "flags" },
3000                 { "dub"                 , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DUB               },    .unit = "flags" },
3001                 { "original"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_ORIGINAL          },    .unit = "flags" },
3002                 { "comment"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_COMMENT           },    .unit = "flags" },
3003                 { "lyrics"              , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_LYRICS            },    .unit = "flags" },
3004                 { "karaoke"             , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_KARAOKE           },    .unit = "flags" },
3005                 { "forced"              , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_FORCED            },    .unit = "flags" },
3006                 { "hearing_impaired"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_HEARING_IMPAIRED  },    .unit = "flags" },
3007                 { "visual_impaired"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_VISUAL_IMPAIRED   },    .unit = "flags" },
3008                 { "clean_effects"       , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CLEAN_EFFECTS     },    .unit = "flags" },
3009                 { "captions"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CAPTIONS          },    .unit = "flags" },
3010                 { "descriptions"        , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DESCRIPTIONS      },    .unit = "flags" },
3011                 { "metadata"            , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_METADATA          },    .unit = "flags" },
3012                 { NULL },
3013             };
3014             static const AVClass class = {
3015                 .class_name = "",
3016                 .item_name  = av_default_item_name,
3017                 .option     = opts,
3018                 .version    = LIBAVUTIL_VERSION_INT,
3019             };
3020             const AVClass *pclass = &class;
3021
3022             ret = av_opt_eval_flags(&pclass, &opts[0], ost->disposition, &ost->st->disposition);
3023             if (ret < 0)
3024                 goto dump_format;
3025         }
3026     }
3027
3028     /* open each encoder */
3029     for (i = 0; i < nb_output_streams; i++) {
3030         ost = output_streams[i];
3031         if (ost->encoding_needed) {
3032             AVCodec      *codec = ost->enc;
3033             AVCodecContext *dec = NULL;
3034
3035             if ((ist = get_input_stream(ost)))
3036                 dec = ist->dec_ctx;
3037             if (dec && dec->subtitle_header) {
3038                 /* ASS code assumes this buffer is null terminated so add extra byte. */
3039                 ost->enc_ctx->subtitle_header = av_mallocz(dec->subtitle_header_size + 1);
3040                 if (!ost->enc_ctx->subtitle_header) {
3041                     ret = AVERROR(ENOMEM);
3042                     goto dump_format;
3043                 }
3044                 memcpy(ost->enc_ctx->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
3045                 ost->enc_ctx->subtitle_header_size = dec->subtitle_header_size;
3046             }
3047             if (!av_dict_get(ost->encoder_opts, "threads", NULL, 0))
3048                 av_dict_set(&ost->encoder_opts, "threads", "auto", 0);
3049             av_dict_set(&ost->encoder_opts, "side_data_only_packets", "1", 0);
3050
3051             if ((ret = avcodec_open2(ost->enc_ctx, codec, &ost->encoder_opts)) < 0) {
3052                 if (ret == AVERROR_EXPERIMENTAL)
3053                     abort_codec_experimental(codec, 1);
3054                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
3055                         ost->file_index, ost->index);
3056                 goto dump_format;
3057             }
3058             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
3059                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
3060                 av_buffersink_set_frame_size(ost->filter->filter,
3061                                              ost->enc_ctx->frame_size);
3062             assert_avoptions(ost->encoder_opts);
3063             if (ost->enc_ctx->bit_rate && ost->enc_ctx->bit_rate < 1000)
3064                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
3065                                              " It takes bits/s as argument, not kbits/s\n");
3066
3067             ret = avcodec_copy_context(ost->st->codec, ost->enc_ctx);
3068             if (ret < 0) {
3069                 av_log(NULL, AV_LOG_FATAL,
3070                        "Error initializing the output stream codec context.\n");
3071                 exit_program(1);
3072             }
3073
3074             // copy timebase while removing common factors
3075             ost->st->time_base = av_add_q(ost->enc_ctx->time_base, (AVRational){0, 1});
3076             ost->st->codec->codec= ost->enc_ctx->codec;
3077         } else {
3078             ret = av_opt_set_dict(ost->enc_ctx, &ost->encoder_opts);
3079             if (ret < 0) {
3080                 av_log(NULL, AV_LOG_FATAL,
3081                     "Error setting up codec context options.\n");
3082                 return ret;
3083             }
3084             // copy timebase while removing common factors
3085             ost->st->time_base = av_add_q(ost->st->codec->time_base, (AVRational){0, 1});
3086         }
3087     }
3088
3089     /* init input streams */
3090     for (i = 0; i < nb_input_streams; i++)
3091         if ((ret = init_input_stream(i, error, sizeof(error))) < 0) {
3092             for (i = 0; i < nb_output_streams; i++) {
3093                 ost = output_streams[i];
3094                 avcodec_close(ost->enc_ctx);
3095             }
3096             goto dump_format;
3097         }
3098
3099     /* discard unused programs */
3100     for (i = 0; i < nb_input_files; i++) {
3101         InputFile *ifile = input_files[i];
3102         for (j = 0; j < ifile->ctx->nb_programs; j++) {
3103             AVProgram *p = ifile->ctx->programs[j];
3104             int discard  = AVDISCARD_ALL;
3105
3106             for (k = 0; k < p->nb_stream_indexes; k++)
3107                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
3108                     discard = AVDISCARD_DEFAULT;
3109                     break;
3110                 }
3111             p->discard = discard;
3112         }
3113     }
3114
3115     /* open files and write file headers */
3116     for (i = 0; i < nb_output_files; i++) {
3117         oc = output_files[i]->ctx;
3118         oc->interrupt_callback = int_cb;
3119         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
3120             snprintf(error, sizeof(error),
3121                      "Could not write header for output file #%d "
3122                      "(incorrect codec parameters ?): %s",
3123                      i, av_err2str(ret));
3124             ret = AVERROR(EINVAL);
3125             goto dump_format;
3126         }
3127 //         assert_avoptions(output_files[i]->opts);
3128         if (strcmp(oc->oformat->name, "rtp")) {
3129             want_sdp = 0;
3130         }
3131     }
3132
3133  dump_format:
3134     /* dump the file output parameters - cannot be done before in case
3135        of stream copy */
3136     for (i = 0; i < nb_output_files; i++) {
3137         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
3138     }
3139
3140     /* dump the stream mapping */
3141     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
3142     for (i = 0; i < nb_input_streams; i++) {
3143         ist = input_streams[i];
3144
3145         for (j = 0; j < ist->nb_filters; j++) {
3146             if (ist->filters[j]->graph->graph_desc) {
3147                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
3148                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
3149                        ist->filters[j]->name);
3150                 if (nb_filtergraphs > 1)
3151                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
3152                 av_log(NULL, AV_LOG_INFO, "\n");
3153             }
3154         }
3155     }
3156
3157     for (i = 0; i < nb_output_streams; i++) {
3158         ost = output_streams[i];
3159
3160         if (ost->attachment_filename) {
3161             /* an attached file */
3162             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
3163                    ost->attachment_filename, ost->file_index, ost->index);
3164             continue;
3165         }
3166
3167         if (ost->filter && ost->filter->graph->graph_desc) {
3168             /* output from a complex graph */
3169             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
3170             if (nb_filtergraphs > 1)
3171                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
3172
3173             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
3174                    ost->index, ost->enc ? ost->enc->name : "?");
3175             continue;
3176         }
3177
3178         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
3179                input_streams[ost->source_index]->file_index,
3180                input_streams[ost->source_index]->st->index,
3181                ost->file_index,
3182                ost->index);
3183         if (ost->sync_ist != input_streams[ost->source_index])
3184             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
3185                    ost->sync_ist->file_index,
3186                    ost->sync_ist->st->index);
3187         if (ost->stream_copy)
3188             av_log(NULL, AV_LOG_INFO, " (copy)");
3189         else {
3190             const AVCodec *in_codec    = input_streams[ost->source_index]->dec;
3191             const AVCodec *out_codec   = ost->enc;
3192             const char *decoder_name   = "?";
3193             const char *in_codec_name  = "?";
3194             const char *encoder_name   = "?";
3195             const char *out_codec_name = "?";
3196             const AVCodecDescriptor *desc;
3197
3198             if (in_codec) {
3199                 decoder_name  = in_codec->name;
3200                 desc = avcodec_descriptor_get(in_codec->id);
3201                 if (desc)
3202                     in_codec_name = desc->name;
3203                 if (!strcmp(decoder_name, in_codec_name))
3204                     decoder_name = "native";
3205             }
3206
3207             if (out_codec) {
3208                 encoder_name   = out_codec->name;
3209                 desc = avcodec_descriptor_get(out_codec->id);
3210                 if (desc)
3211                     out_codec_name = desc->name;
3212                 if (!strcmp(encoder_name, out_codec_name))
3213                     encoder_name = "native";
3214             }
3215
3216             av_log(NULL, AV_LOG_INFO, " (%s (%s) -> %s (%s))",
3217                    in_codec_name, decoder_name,
3218                    out_codec_name, encoder_name);
3219         }
3220         av_log(NULL, AV_LOG_INFO, "\n");
3221     }
3222
3223     if (ret) {
3224         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
3225         return ret;
3226     }
3227
3228     if (sdp_filename || want_sdp) {
3229         print_sdp();
3230     }
3231
3232     transcode_init_done = 1;
3233
3234     return 0;
3235 }
3236
3237 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
3238 static int need_output(void)
3239 {
3240     int i;
3241
3242     for (i = 0; i < nb_output_streams; i++) {
3243         OutputStream *ost    = output_streams[i];
3244         OutputFile *of       = output_files[ost->file_index];
3245         AVFormatContext *os  = output_files[ost->file_index]->ctx;
3246
3247         if (ost->finished ||
3248             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
3249             continue;
3250         if (ost->frame_number >= ost->max_frames) {
3251             int j;
3252             for (j = 0; j < of->ctx->nb_streams; j++)
3253                 close_output_stream(output_streams[of->ost_index + j]);
3254             continue;
3255         }
3256
3257         return 1;
3258     }
3259
3260     return 0;
3261 }
3262
3263 /**
3264  * Select the output stream to process.
3265  *
3266  * @return  selected output stream, or NULL if none available
3267  */
3268 static OutputStream *choose_output(void)
3269 {
3270     int i;
3271     int64_t opts_min = INT64_MAX;
3272     OutputStream *ost_min = NULL;
3273
3274     for (i = 0; i < nb_output_streams; i++) {
3275         OutputStream *ost = output_streams[i];
3276         int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
3277                                     AV_TIME_BASE_Q);
3278         if (!ost->finished && opts < opts_min) {
3279             opts_min = opts;
3280             ost_min  = ost->unavailable ? NULL : ost;
3281         }
3282     }
3283     return ost_min;
3284 }
3285
3286 static int check_keyboard_interaction(int64_t cur_time)
3287 {
3288     int i, ret, key;
3289     static int64_t last_time;
3290     if (received_nb_signals)
3291         return AVERROR_EXIT;
3292     /* read_key() returns 0 on EOF */
3293     if(cur_time - last_time >= 100000 && !run_as_daemon){
3294         key =  read_key();
3295         last_time = cur_time;
3296     }else
3297         key = -1;
3298     if (key == 'q')
3299         return AVERROR_EXIT;
3300     if (key == '+') av_log_set_level(av_log_get_level()+10);
3301     if (key == '-') av_log_set_level(av_log_get_level()-10);
3302     if (key == 's') qp_hist     ^= 1;
3303     if (key == 'h'){
3304         if (do_hex_dump){
3305             do_hex_dump = do_pkt_dump = 0;
3306         } else if(do_pkt_dump){
3307             do_hex_dump = 1;
3308         } else
3309             do_pkt_dump = 1;
3310         av_log_set_level(AV_LOG_DEBUG);
3311     }
3312     if (key == 'c' || key == 'C'){
3313         char buf[4096], target[64], command[256], arg[256] = {0};
3314         double time;
3315         int k, n = 0;
3316         fprintf(stderr, "\nEnter command: <target>|all <time>|-1 <command>[ <argument>]\n");
3317         i = 0;
3318         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
3319             if (k > 0)
3320                 buf[i++] = k;
3321         buf[i] = 0;
3322         if (k > 0 &&
3323             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
3324             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
3325                    target, time, command, arg);
3326             for (i = 0; i < nb_filtergraphs; i++) {
3327                 FilterGraph *fg = filtergraphs[i];
3328                 if (fg->graph) {
3329                     if (time < 0) {
3330                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
3331                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
3332                         fprintf(stderr, "Command reply for stream %d: ret:%d res:\n%s", i, ret, buf);
3333                     } else if (key == 'c') {
3334                         fprintf(stderr, "Queing commands only on filters supporting the specific command is unsupported\n");
3335                         ret = AVERROR_PATCHWELCOME;
3336                     } else {
3337                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
3338                     }
3339                 }
3340             }
3341         } else {
3342             av_log(NULL, AV_LOG_ERROR,
3343                    "Parse error, at least 3 arguments were expected, "
3344                    "only %d given in string '%s'\n", n, buf);
3345         }
3346     }
3347     if (key == 'd' || key == 'D'){
3348         int debug=0;
3349         if(key == 'D') {
3350             debug = input_streams[0]->st->codec->debug<<1;
3351             if(!debug) debug = 1;
3352             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
3353                 debug += debug;
3354         }else
3355             if(scanf("%d", &debug)!=1)
3356                 fprintf(stderr,"error parsing debug value\n");
3357         for(i=0;i<nb_input_streams;i++) {
3358             input_streams[i]->st->codec->debug = debug;
3359         }
3360         for(i=0;i<nb_output_streams;i++) {
3361             OutputStream *ost = output_streams[i];
3362             ost->enc_ctx->debug = debug;
3363         }
3364         if(debug) av_log_set_level(AV_LOG_DEBUG);
3365         fprintf(stderr,"debug=%d\n", debug);
3366     }
3367     if (key == '?'){
3368         fprintf(stderr, "key    function\n"
3369                         "?      show this help\n"
3370                         "+      increase verbosity\n"
3371                         "-      decrease verbosity\n"
3372                         "c      Send command to first matching filter supporting it\n"
3373                         "C      Send/Que command to all matching filters\n"
3374                         "D      cycle through available debug modes\n"
3375                         "h      dump packets/hex press to cycle through the 3 states\n"
3376                         "q      quit\n"
3377                         "s      Show QP histogram\n"
3378         );
3379     }
3380     return 0;
3381 }
3382
3383 #if HAVE_PTHREADS
3384 static void *input_thread(void *arg)
3385 {
3386     InputFile *f = arg;
3387     unsigned flags = f->non_blocking ? AV_THREAD_MESSAGE_NONBLOCK : 0;
3388     int ret = 0;
3389
3390     while (1) {
3391         AVPacket pkt;
3392         ret = av_read_frame(f->ctx, &pkt);
3393
3394         if (ret == AVERROR(EAGAIN)) {
3395             av_usleep(10000);
3396             continue;
3397         }
3398         if (ret < 0) {
3399             av_thread_message_queue_set_err_recv(f->in_thread_queue, ret);
3400             break;
3401         }
3402         av_dup_packet(&pkt);
3403         ret = av_thread_message_queue_send(f->in_thread_queue, &pkt, flags);
3404         if (flags && ret == AVERROR(EAGAIN)) {
3405             flags = 0;
3406             ret = av_thread_message_queue_send(f->in_thread_queue, &pkt, flags);
3407             av_log(f->ctx, AV_LOG_WARNING,
3408                    "Thread message queue blocking; consider raising the "
3409                    "thread_queue_size option (current value: %d)\n",
3410                    f->thread_queue_size);
3411         }
3412         if (ret < 0) {
3413             if (ret != AVERROR_EOF)
3414                 av_log(f->ctx, AV_LOG_ERROR,
3415                        "Unable to send packet to main thread: %s\n",
3416                        av_err2str(ret));
3417             av_free_packet(&pkt);
3418             av_thread_message_queue_set_err_recv(f->in_thread_queue, ret);
3419             break;
3420         }
3421     }
3422
3423     return NULL;
3424 }
3425
3426 static void free_input_threads(void)
3427 {
3428     int i;
3429
3430     for (i = 0; i < nb_input_files; i++) {
3431         InputFile *f = input_files[i];
3432         AVPacket pkt;
3433
3434         if (!f->in_thread_queue)
3435             continue;
3436         av_thread_message_queue_set_err_send(f->in_thread_queue, AVERROR_EOF);
3437         while (av_thread_message_queue_recv(f->in_thread_queue, &pkt, 0) >= 0)
3438             av_free_packet(&pkt);
3439
3440         pthread_join(f->thread, NULL);
3441         f->joined = 1;
3442         av_thread_message_queue_free(&f->in_thread_queue);
3443     }
3444 }
3445
3446 static int init_input_threads(void)
3447 {
3448     int i, ret;
3449
3450     if (nb_input_files == 1)
3451         return 0;
3452
3453     for (i = 0; i < nb_input_files; i++) {
3454         InputFile *f = input_files[i];
3455
3456         if (f->ctx->pb ? !f->ctx->pb->seekable :
3457             strcmp(f->ctx->iformat->name, "lavfi"))
3458             f->non_blocking = 1;
3459         ret = av_thread_message_queue_alloc(&f->in_thread_queue,
3460                                             f->thread_queue_size, sizeof(AVPacket));
3461         if (ret < 0)
3462             return ret;
3463
3464         if ((ret = pthread_create(&f->thread, NULL, input_thread, f))) {
3465             av_log(NULL, AV_LOG_ERROR, "pthread_create failed: %s. Try to increase `ulimit -v` or decrease `ulimit -s`.\n", strerror(ret));
3466             av_thread_message_queue_free(&f->in_thread_queue);
3467             return AVERROR(ret);
3468         }
3469     }
3470     return 0;
3471 }
3472
3473 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
3474 {
3475     return av_thread_message_queue_recv(f->in_thread_queue, pkt,
3476                                         f->non_blocking ?
3477                                         AV_THREAD_MESSAGE_NONBLOCK : 0);
3478 }
3479 #endif
3480
3481 static int get_input_packet(InputFile *f, AVPacket *pkt)
3482 {
3483     if (f->rate_emu) {
3484         int i;
3485         for (i = 0; i < f->nb_streams; i++) {
3486             InputStream *ist = input_streams[f->ist_index + i];
3487             int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
3488             int64_t now = av_gettime_relative() - ist->start;
3489             if (pts > now)
3490                 return AVERROR(EAGAIN);
3491         }
3492     }
3493
3494 #if HAVE_PTHREADS
3495     if (nb_input_files > 1)
3496         return get_input_packet_mt(f, pkt);
3497 #endif
3498     return av_read_frame(f->ctx, pkt);
3499 }
3500
3501 static int got_eagain(void)
3502 {
3503     int i;
3504     for (i = 0; i < nb_output_streams; i++)
3505         if (output_streams[i]->unavailable)
3506             return 1;
3507     return 0;
3508 }
3509
3510 static void reset_eagain(void)
3511 {
3512     int i;
3513     for (i = 0; i < nb_input_files; i++)
3514         input_files[i]->eagain = 0;
3515     for (i = 0; i < nb_output_streams; i++)
3516         output_streams[i]->unavailable = 0;
3517 }
3518
3519 /*
3520  * Return
3521  * - 0 -- one packet was read and processed
3522  * - AVERROR(EAGAIN) -- no packets were available for selected file,
3523  *   this function should be called again
3524  * - AVERROR_EOF -- this function should not be called again
3525  */
3526 static int process_input(int file_index)
3527 {
3528     InputFile *ifile = input_files[file_index];
3529     AVFormatContext *is;
3530     InputStream *ist;
3531     AVPacket pkt;
3532     int ret, i, j;
3533
3534     is  = ifile->ctx;
3535     ret = get_input_packet(ifile, &pkt);
3536
3537     if (ret == AVERROR(EAGAIN)) {
3538         ifile->eagain = 1;
3539         return ret;
3540     }
3541     if (ret < 0) {
3542         if (ret != AVERROR_EOF) {
3543             print_error(is->filename, ret);
3544             if (exit_on_error)
3545                 exit_program(1);
3546         }
3547
3548         for (i = 0; i < ifile->nb_streams; i++) {
3549             ist = input_streams[ifile->ist_index + i];
3550             if (ist->decoding_needed) {
3551                 ret = process_input_packet(ist, NULL);
3552                 if (ret>0)
3553                     return 0;
3554             }
3555
3556             /* mark all outputs that don't go through lavfi as finished */
3557             for (j = 0; j < nb_output_streams; j++) {
3558                 OutputStream *ost = output_streams[j];
3559
3560                 if (ost->source_index == ifile->ist_index + i &&
3561                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
3562                     finish_output_stream(ost);
3563             }
3564         }
3565
3566         ifile->eof_reached = 1;
3567         return AVERROR(EAGAIN);
3568     }
3569
3570     reset_eagain();
3571
3572     if (do_pkt_dump) {
3573         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3574                          is->streams[pkt.stream_index]);
3575     }
3576     /* the following test is needed in case new streams appear
3577        dynamically in stream : we ignore them */
3578     if (pkt.stream_index >= ifile->nb_streams) {
3579         report_new_stream(file_index, &pkt);
3580         goto discard_packet;
3581     }
3582
3583     ist = input_streams[ifile->ist_index + pkt.stream_index];
3584
3585     ist->data_size += pkt.size;
3586     ist->nb_packets++;
3587
3588     if (ist->discard)
3589         goto discard_packet;
3590
3591     if (debug_ts) {
3592         av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
3593                "next_dts:%s next_dts_time:%s next_pts:%s next_pts_time:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%s off_time:%s\n",
3594                ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->dec_ctx->codec_type),
3595                av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &AV_TIME_BASE_Q),
3596                av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &AV_TIME_BASE_Q),
3597                av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3598                av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3599                av_ts2str(input_files[ist->file_index]->ts_offset),
3600                av_ts2timestr(input_files[ist->file_index]->ts_offset, &AV_TIME_BASE_Q));
3601     }
3602
3603     if(!ist->wrap_correction_done && is->start_time != AV_NOPTS_VALUE && ist->st->pts_wrap_bits < 64){
3604         int64_t stime, stime2;