avutil/cpu: force mmx on selection of higher x86 SIMD features
[ffmpeg.git] / ffmpeg.c
1 /*
2  * Copyright (c) 2000-2003 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 /**
22  * @file
23  * multimedia converter based on the FFmpeg libraries
24  */
25
26 #include "config.h"
27 #include <ctype.h>
28 #include <string.h>
29 #include <math.h>
30 #include <stdlib.h>
31 #include <errno.h>
32 #include <limits.h>
33 #if HAVE_ISATTY
34 #if HAVE_IO_H
35 #include <io.h>
36 #endif
37 #if HAVE_UNISTD_H
38 #include <unistd.h>
39 #endif
40 #endif
41 #include "libavformat/avformat.h"
42 #include "libavdevice/avdevice.h"
43 #include "libswscale/swscale.h"
44 #include "libswresample/swresample.h"
45 #include "libavutil/opt.h"
46 #include "libavutil/channel_layout.h"
47 #include "libavutil/parseutils.h"
48 #include "libavutil/samplefmt.h"
49 #include "libavutil/fifo.h"
50 #include "libavutil/intreadwrite.h"
51 #include "libavutil/dict.h"
52 #include "libavutil/mathematics.h"
53 #include "libavutil/pixdesc.h"
54 #include "libavutil/avstring.h"
55 #include "libavutil/libm.h"
56 #include "libavutil/imgutils.h"
57 #include "libavutil/timestamp.h"
58 #include "libavutil/bprint.h"
59 #include "libavutil/time.h"
60 #include "libavformat/os_support.h"
61
62 #include "libavformat/ffm.h" // not public API
63
64 # include "libavfilter/avcodec.h"
65 # include "libavfilter/avfilter.h"
66 # include "libavfilter/buffersrc.h"
67 # include "libavfilter/buffersink.h"
68
69 #if HAVE_SYS_RESOURCE_H
70 #include <sys/time.h>
71 #include <sys/types.h>
72 #include <sys/resource.h>
73 #elif HAVE_GETPROCESSTIMES
74 #include <windows.h>
75 #endif
76 #if HAVE_GETPROCESSMEMORYINFO
77 #include <windows.h>
78 #include <psapi.h>
79 #endif
80
81 #if HAVE_SYS_SELECT_H
82 #include <sys/select.h>
83 #endif
84
85 #if HAVE_TERMIOS_H
86 #include <fcntl.h>
87 #include <sys/ioctl.h>
88 #include <sys/time.h>
89 #include <termios.h>
90 #elif HAVE_KBHIT
91 #include <conio.h>
92 #endif
93
94 #if HAVE_PTHREADS
95 #include <pthread.h>
96 #endif
97
98 #include <time.h>
99
100 #include "ffmpeg.h"
101 #include "cmdutils.h"
102
103 #include "libavutil/avassert.h"
104
105 const char program_name[] = "ffmpeg";
106 const int program_birth_year = 2000;
107
108 static FILE *vstats_file;
109
110 const char *const forced_keyframes_const_names[] = {
111     "n",
112     "n_forced",
113     "prev_forced_n",
114     "prev_forced_t",
115     "t",
116     NULL
117 };
118
119 static void do_video_stats(OutputStream *ost, int frame_size);
120 static int64_t getutime(void);
121 static int64_t getmaxrss(void);
122
123 static int run_as_daemon  = 0;
124 static int64_t video_size = 0;
125 static int64_t audio_size = 0;
126 static int64_t subtitle_size = 0;
127 static int64_t extra_size = 0;
128 static int nb_frames_dup = 0;
129 static int nb_frames_drop = 0;
130 static int64_t decode_error_stat[2];
131
132 static int current_time;
133 AVIOContext *progress_avio = NULL;
134
135 static uint8_t *subtitle_out;
136
137 #if HAVE_PTHREADS
138 /* signal to input threads that they should exit; set by the main thread */
139 static int transcoding_finished;
140 #endif
141
142 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
143
144 InputStream **input_streams = NULL;
145 int        nb_input_streams = 0;
146 InputFile   **input_files   = NULL;
147 int        nb_input_files   = 0;
148
149 OutputStream **output_streams = NULL;
150 int         nb_output_streams = 0;
151 OutputFile   **output_files   = NULL;
152 int         nb_output_files   = 0;
153
154 FilterGraph **filtergraphs;
155 int        nb_filtergraphs;
156
157 #if HAVE_TERMIOS_H
158
159 /* init terminal so that we can grab keys */
160 static struct termios oldtty;
161 static int restore_tty;
162 #endif
163
164 static void free_input_threads(void);
165
166
167 /* sub2video hack:
168    Convert subtitles to video with alpha to insert them in filter graphs.
169    This is a temporary solution until libavfilter gets real subtitles support.
170  */
171
172 static int sub2video_get_blank_frame(InputStream *ist)
173 {
174     int ret;
175     AVFrame *frame = ist->sub2video.frame;
176
177     av_frame_unref(frame);
178     ist->sub2video.frame->width  = ist->sub2video.w;
179     ist->sub2video.frame->height = ist->sub2video.h;
180     ist->sub2video.frame->format = AV_PIX_FMT_RGB32;
181     if ((ret = av_frame_get_buffer(frame, 32)) < 0)
182         return ret;
183     memset(frame->data[0], 0, frame->height * frame->linesize[0]);
184     return 0;
185 }
186
187 static void sub2video_copy_rect(uint8_t *dst, int dst_linesize, int w, int h,
188                                 AVSubtitleRect *r)
189 {
190     uint32_t *pal, *dst2;
191     uint8_t *src, *src2;
192     int x, y;
193
194     if (r->type != SUBTITLE_BITMAP) {
195         av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n");
196         return;
197     }
198     if (r->x < 0 || r->x + r->w > w || r->y < 0 || r->y + r->h > h) {
199         av_log(NULL, AV_LOG_WARNING, "sub2video: rectangle overflowing\n");
200         return;
201     }
202
203     dst += r->y * dst_linesize + r->x * 4;
204     src = r->pict.data[0];
205     pal = (uint32_t *)r->pict.data[1];
206     for (y = 0; y < r->h; y++) {
207         dst2 = (uint32_t *)dst;
208         src2 = src;
209         for (x = 0; x < r->w; x++)
210             *(dst2++) = pal[*(src2++)];
211         dst += dst_linesize;
212         src += r->pict.linesize[0];
213     }
214 }
215
216 static void sub2video_push_ref(InputStream *ist, int64_t pts)
217 {
218     AVFrame *frame = ist->sub2video.frame;
219     int i;
220
221     av_assert1(frame->data[0]);
222     ist->sub2video.last_pts = frame->pts = pts;
223     for (i = 0; i < ist->nb_filters; i++)
224         av_buffersrc_add_frame_flags(ist->filters[i]->filter, frame,
225                                      AV_BUFFERSRC_FLAG_KEEP_REF |
226                                      AV_BUFFERSRC_FLAG_PUSH);
227 }
228
229 static void sub2video_update(InputStream *ist, AVSubtitle *sub)
230 {
231     int w = ist->sub2video.w, h = ist->sub2video.h;
232     AVFrame *frame = ist->sub2video.frame;
233     int8_t *dst;
234     int     dst_linesize;
235     int num_rects, i;
236     int64_t pts, end_pts;
237
238     if (!frame)
239         return;
240     if (sub) {
241         pts       = av_rescale_q(sub->pts + sub->start_display_time * 1000,
242                                  AV_TIME_BASE_Q, ist->st->time_base);
243         end_pts   = av_rescale_q(sub->pts + sub->end_display_time   * 1000,
244                                  AV_TIME_BASE_Q, ist->st->time_base);
245         num_rects = sub->num_rects;
246     } else {
247         pts       = ist->sub2video.end_pts;
248         end_pts   = INT64_MAX;
249         num_rects = 0;
250     }
251     if (sub2video_get_blank_frame(ist) < 0) {
252         av_log(ist->st->codec, AV_LOG_ERROR,
253                "Impossible to get a blank canvas.\n");
254         return;
255     }
256     dst          = frame->data    [0];
257     dst_linesize = frame->linesize[0];
258     for (i = 0; i < num_rects; i++)
259         sub2video_copy_rect(dst, dst_linesize, w, h, sub->rects[i]);
260     sub2video_push_ref(ist, pts);
261     ist->sub2video.end_pts = end_pts;
262 }
263
264 static void sub2video_heartbeat(InputStream *ist, int64_t pts)
265 {
266     InputFile *infile = input_files[ist->file_index];
267     int i, j, nb_reqs;
268     int64_t pts2;
269
270     /* When a frame is read from a file, examine all sub2video streams in
271        the same file and send the sub2video frame again. Otherwise, decoded
272        video frames could be accumulating in the filter graph while a filter
273        (possibly overlay) is desperately waiting for a subtitle frame. */
274     for (i = 0; i < infile->nb_streams; i++) {
275         InputStream *ist2 = input_streams[infile->ist_index + i];
276         if (!ist2->sub2video.frame)
277             continue;
278         /* subtitles seem to be usually muxed ahead of other streams;
279            if not, substracting a larger time here is necessary */
280         pts2 = av_rescale_q(pts, ist->st->time_base, ist2->st->time_base) - 1;
281         /* do not send the heartbeat frame if the subtitle is already ahead */
282         if (pts2 <= ist2->sub2video.last_pts)
283             continue;
284         if (pts2 >= ist2->sub2video.end_pts || !ist2->sub2video.frame->data[0])
285             sub2video_update(ist2, NULL);
286         for (j = 0, nb_reqs = 0; j < ist2->nb_filters; j++)
287             nb_reqs += av_buffersrc_get_nb_failed_requests(ist2->filters[j]->filter);
288         if (nb_reqs)
289             sub2video_push_ref(ist2, pts2);
290     }
291 }
292
293 static void sub2video_flush(InputStream *ist)
294 {
295     int i;
296
297     for (i = 0; i < ist->nb_filters; i++)
298         av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
299 }
300
301 /* end of sub2video hack */
302
303 void term_exit(void)
304 {
305     av_log(NULL, AV_LOG_QUIET, "%s", "");
306 #if HAVE_TERMIOS_H
307     if(restore_tty)
308         tcsetattr (0, TCSANOW, &oldtty);
309 #endif
310 }
311
312 static volatile int received_sigterm = 0;
313 static volatile int received_nb_signals = 0;
314
315 static void
316 sigterm_handler(int sig)
317 {
318     received_sigterm = sig;
319     received_nb_signals++;
320     term_exit();
321     if(received_nb_signals > 3)
322         exit(123);
323 }
324
325 void term_init(void)
326 {
327 #if HAVE_TERMIOS_H
328     if(!run_as_daemon){
329         struct termios tty;
330         int istty = 1;
331 #if HAVE_ISATTY
332         istty = isatty(0) && isatty(2);
333 #endif
334         if (istty && tcgetattr (0, &tty) == 0) {
335             oldtty = tty;
336             restore_tty = 1;
337
338             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
339                              |INLCR|IGNCR|ICRNL|IXON);
340             tty.c_oflag |= OPOST;
341             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
342             tty.c_cflag &= ~(CSIZE|PARENB);
343             tty.c_cflag |= CS8;
344             tty.c_cc[VMIN] = 1;
345             tty.c_cc[VTIME] = 0;
346
347             tcsetattr (0, TCSANOW, &tty);
348         }
349         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
350     }
351 #endif
352     avformat_network_deinit();
353
354     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
355     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
356 #ifdef SIGXCPU
357     signal(SIGXCPU, sigterm_handler);
358 #endif
359 }
360
361 /* read a key without blocking */
362 static int read_key(void)
363 {
364     unsigned char ch;
365 #if HAVE_TERMIOS_H
366     int n = 1;
367     struct timeval tv;
368     fd_set rfds;
369
370     FD_ZERO(&rfds);
371     FD_SET(0, &rfds);
372     tv.tv_sec = 0;
373     tv.tv_usec = 0;
374     n = select(1, &rfds, NULL, NULL, &tv);
375     if (n > 0) {
376         n = read(0, &ch, 1);
377         if (n == 1)
378             return ch;
379
380         return n;
381     }
382 #elif HAVE_KBHIT
383 #    if HAVE_PEEKNAMEDPIPE
384     static int is_pipe;
385     static HANDLE input_handle;
386     DWORD dw, nchars;
387     if(!input_handle){
388         input_handle = GetStdHandle(STD_INPUT_HANDLE);
389         is_pipe = !GetConsoleMode(input_handle, &dw);
390     }
391
392     if (stdin->_cnt > 0) {
393         read(0, &ch, 1);
394         return ch;
395     }
396     if (is_pipe) {
397         /* When running under a GUI, you will end here. */
398         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL)) {
399             // input pipe may have been closed by the program that ran ffmpeg
400             return -1;
401         }
402         //Read it
403         if(nchars != 0) {
404             read(0, &ch, 1);
405             return ch;
406         }else{
407             return -1;
408         }
409     }
410 #    endif
411     if(kbhit())
412         return(getch());
413 #endif
414     return -1;
415 }
416
417 static int decode_interrupt_cb(void *ctx)
418 {
419     return received_nb_signals > 1;
420 }
421
422 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
423
424 static void ffmpeg_cleanup(int ret)
425 {
426     int i, j;
427
428     if (do_benchmark) {
429         int maxrss = getmaxrss() / 1024;
430         printf("bench: maxrss=%ikB\n", maxrss);
431     }
432
433     for (i = 0; i < nb_filtergraphs; i++) {
434         avfilter_graph_free(&filtergraphs[i]->graph);
435         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
436             av_freep(&filtergraphs[i]->inputs[j]->name);
437             av_freep(&filtergraphs[i]->inputs[j]);
438         }
439         av_freep(&filtergraphs[i]->inputs);
440         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
441             av_freep(&filtergraphs[i]->outputs[j]->name);
442             av_freep(&filtergraphs[i]->outputs[j]);
443         }
444         av_freep(&filtergraphs[i]->outputs);
445         av_freep(&filtergraphs[i]->graph_desc);
446         av_freep(&filtergraphs[i]);
447     }
448     av_freep(&filtergraphs);
449
450     av_freep(&subtitle_out);
451
452     /* close files */
453     for (i = 0; i < nb_output_files; i++) {
454         AVFormatContext *s = output_files[i]->ctx;
455         if (s && s->oformat && !(s->oformat->flags & AVFMT_NOFILE) && s->pb)
456             avio_close(s->pb);
457         avformat_free_context(s);
458         av_dict_free(&output_files[i]->opts);
459         av_freep(&output_files[i]);
460     }
461     for (i = 0; i < nb_output_streams; i++) {
462         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
463         while (bsfc) {
464             AVBitStreamFilterContext *next = bsfc->next;
465             av_bitstream_filter_close(bsfc);
466             bsfc = next;
467         }
468         output_streams[i]->bitstream_filters = NULL;
469         avcodec_free_frame(&output_streams[i]->filtered_frame);
470
471         av_freep(&output_streams[i]->forced_keyframes);
472         av_expr_free(output_streams[i]->forced_keyframes_pexpr);
473         av_freep(&output_streams[i]->avfilter);
474         av_freep(&output_streams[i]->logfile_prefix);
475         av_freep(&output_streams[i]);
476     }
477 #if HAVE_PTHREADS
478     free_input_threads();
479 #endif
480     for (i = 0; i < nb_input_files; i++) {
481         avformat_close_input(&input_files[i]->ctx);
482         av_freep(&input_files[i]);
483     }
484     for (i = 0; i < nb_input_streams; i++) {
485         av_frame_free(&input_streams[i]->decoded_frame);
486         av_frame_free(&input_streams[i]->filter_frame);
487         av_dict_free(&input_streams[i]->opts);
488         avsubtitle_free(&input_streams[i]->prev_sub.subtitle);
489         av_frame_free(&input_streams[i]->sub2video.frame);
490         av_freep(&input_streams[i]->filters);
491         av_freep(&input_streams[i]);
492     }
493
494     if (vstats_file)
495         fclose(vstats_file);
496     av_free(vstats_filename);
497
498     av_freep(&input_streams);
499     av_freep(&input_files);
500     av_freep(&output_streams);
501     av_freep(&output_files);
502
503     uninit_opts();
504
505     avformat_network_deinit();
506
507     if (received_sigterm) {
508         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
509                (int) received_sigterm);
510     }
511     term_exit();
512 }
513
514 void assert_avoptions(AVDictionary *m)
515 {
516     AVDictionaryEntry *t;
517     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
518         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
519         exit_program(1);
520     }
521 }
522
523 static void abort_codec_experimental(AVCodec *c, int encoder)
524 {
525     exit_program(1);
526 }
527
528 static void update_benchmark(const char *fmt, ...)
529 {
530     if (do_benchmark_all) {
531         int64_t t = getutime();
532         va_list va;
533         char buf[1024];
534
535         if (fmt) {
536             va_start(va, fmt);
537             vsnprintf(buf, sizeof(buf), fmt, va);
538             va_end(va);
539             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
540         }
541         current_time = t;
542     }
543 }
544
545 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
546 {
547     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
548     AVCodecContext          *avctx = ost->st->codec;
549     int ret;
550
551     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
552         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
553         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
554
555     /*
556      * Audio encoders may split the packets --  #frames in != #packets out.
557      * But there is no reordering, so we can limit the number of output packets
558      * by simply dropping them here.
559      * Counting encoded video frames needs to be done separately because of
560      * reordering, see do_video_out()
561      */
562     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
563         if (ost->frame_number >= ost->max_frames) {
564             av_free_packet(pkt);
565             return;
566         }
567         ost->frame_number++;
568     }
569
570     while (bsfc) {
571         AVPacket new_pkt = *pkt;
572         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
573                                            &new_pkt.data, &new_pkt.size,
574                                            pkt->data, pkt->size,
575                                            pkt->flags & AV_PKT_FLAG_KEY);
576         if(a == 0 && new_pkt.data != pkt->data && new_pkt.destruct) {
577             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
578             if(t) {
579                 memcpy(t, new_pkt.data, new_pkt.size);
580                 memset(t + new_pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
581                 new_pkt.data = t;
582                 new_pkt.buf = NULL;
583                 a = 1;
584             } else
585                 a = AVERROR(ENOMEM);
586         }
587         if (a > 0) {
588             av_free_packet(pkt);
589             new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
590                                            av_buffer_default_free, NULL, 0);
591             if (!new_pkt.buf)
592                 exit_program(1);
593         } else if (a < 0) {
594             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
595                    bsfc->filter->name, pkt->stream_index,
596                    avctx->codec ? avctx->codec->name : "copy");
597             print_error("", a);
598             if (exit_on_error)
599                 exit_program(1);
600         }
601         *pkt = new_pkt;
602
603         bsfc = bsfc->next;
604     }
605
606     if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
607         (avctx->codec_type == AVMEDIA_TYPE_AUDIO || avctx->codec_type == AVMEDIA_TYPE_VIDEO) &&
608         pkt->dts != AV_NOPTS_VALUE &&
609         ost->last_mux_dts != AV_NOPTS_VALUE) {
610       int64_t max = ost->last_mux_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
611       if (pkt->dts < max) {
612         int loglevel = max - pkt->dts > 2 || avctx->codec_type == AVMEDIA_TYPE_VIDEO ? AV_LOG_WARNING : AV_LOG_DEBUG;
613         av_log(s, loglevel, "Non-monotonous DTS in output stream "
614                "%d:%d; previous: %"PRId64", current: %"PRId64"; ",
615                ost->file_index, ost->st->index, ost->last_mux_dts, pkt->dts);
616         if (exit_on_error) {
617             av_log(NULL, AV_LOG_FATAL, "aborting.\n");
618             exit_program(1);
619         }
620         av_log(s, loglevel, "changing to %"PRId64". This may result "
621                "in incorrect timestamps in the output file.\n",
622                max);
623         if(pkt->pts >= pkt->dts)
624             pkt->pts = FFMAX(pkt->pts, max);
625         pkt->dts = max;
626       }
627     }
628     ost->last_mux_dts = pkt->dts;
629
630     pkt->stream_index = ost->index;
631
632     if (debug_ts) {
633         av_log(NULL, AV_LOG_INFO, "muxer <- type:%s "
634                 "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s size:%d\n",
635                 av_get_media_type_string(ost->st->codec->codec_type),
636                 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ost->st->time_base),
637                 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->st->time_base),
638                 pkt->size
639               );
640     }
641
642     ret = av_interleaved_write_frame(s, pkt);
643     if (ret < 0) {
644         print_error("av_interleaved_write_frame()", ret);
645         exit_program(1);
646     }
647 }
648
649 static void close_output_stream(OutputStream *ost)
650 {
651     OutputFile *of = output_files[ost->file_index];
652
653     ost->finished = 1;
654     if (of->shortest) {
655         int64_t end = av_rescale_q(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, AV_TIME_BASE_Q);
656         of->recording_time = FFMIN(of->recording_time, end);
657     }
658 }
659
660 static int check_recording_time(OutputStream *ost)
661 {
662     OutputFile *of = output_files[ost->file_index];
663
664     if (of->recording_time != INT64_MAX &&
665         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
666                       AV_TIME_BASE_Q) >= 0) {
667         close_output_stream(ost);
668         return 0;
669     }
670     return 1;
671 }
672
673 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
674                          AVFrame *frame)
675 {
676     AVCodecContext *enc = ost->st->codec;
677     AVPacket pkt;
678     int got_packet = 0;
679
680     av_init_packet(&pkt);
681     pkt.data = NULL;
682     pkt.size = 0;
683
684     if (!check_recording_time(ost))
685         return;
686
687     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
688         frame->pts = ost->sync_opts;
689     ost->sync_opts = frame->pts + frame->nb_samples;
690
691     av_assert0(pkt.size || !pkt.data);
692     update_benchmark(NULL);
693     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
694         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
695         exit_program(1);
696     }
697     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
698
699     if (got_packet) {
700         if (pkt.pts != AV_NOPTS_VALUE)
701             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
702         if (pkt.dts != AV_NOPTS_VALUE)
703             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
704         if (pkt.duration > 0)
705             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
706
707         if (debug_ts) {
708             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
709                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
710                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
711                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
712         }
713
714         audio_size += pkt.size;
715         write_frame(s, &pkt, ost);
716
717         av_free_packet(&pkt);
718     }
719 }
720
721 static void do_subtitle_out(AVFormatContext *s,
722                             OutputStream *ost,
723                             InputStream *ist,
724                             AVSubtitle *sub)
725 {
726     int subtitle_out_max_size = 1024 * 1024;
727     int subtitle_out_size, nb, i;
728     AVCodecContext *enc;
729     AVPacket pkt;
730     int64_t pts;
731
732     if (sub->pts == AV_NOPTS_VALUE) {
733         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
734         if (exit_on_error)
735             exit_program(1);
736         return;
737     }
738
739     enc = ost->st->codec;
740
741     if (!subtitle_out) {
742         subtitle_out = av_malloc(subtitle_out_max_size);
743     }
744
745     /* Note: DVB subtitle need one packet to draw them and one other
746        packet to clear them */
747     /* XXX: signal it in the codec context ? */
748     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
749         nb = 2;
750     else
751         nb = 1;
752
753     /* shift timestamp to honor -ss and make check_recording_time() work with -t */
754     pts = sub->pts;
755     if (output_files[ost->file_index]->start_time != AV_NOPTS_VALUE)
756         pts -= output_files[ost->file_index]->start_time;
757     for (i = 0; i < nb; i++) {
758         ost->sync_opts = av_rescale_q(pts, AV_TIME_BASE_Q, enc->time_base);
759         if (!check_recording_time(ost))
760             return;
761
762         sub->pts = pts;
763         // start_display_time is required to be 0
764         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
765         sub->end_display_time  -= sub->start_display_time;
766         sub->start_display_time = 0;
767         if (i == 1)
768             sub->num_rects = 0;
769         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
770                                                     subtitle_out_max_size, sub);
771         if (subtitle_out_size < 0) {
772             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
773             exit_program(1);
774         }
775
776         av_init_packet(&pkt);
777         pkt.data = subtitle_out;
778         pkt.size = subtitle_out_size;
779         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
780         pkt.duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->st->time_base);
781         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
782             /* XXX: the pts correction is handled here. Maybe handling
783                it in the codec would be better */
784             if (i == 0)
785                 pkt.pts += 90 * sub->start_display_time;
786             else
787                 pkt.pts += 90 * sub->end_display_time;
788         }
789         subtitle_size += pkt.size;
790         write_frame(s, &pkt, ost);
791     }
792 }
793
794 static void do_video_out(AVFormatContext *s,
795                          OutputStream *ost,
796                          AVFrame *in_picture)
797 {
798     int ret, format_video_sync;
799     AVPacket pkt;
800     AVCodecContext *enc = ost->st->codec;
801     int nb_frames, i;
802     double sync_ipts, delta;
803     double duration = 0;
804     int frame_size = 0;
805     InputStream *ist = NULL;
806
807     if (ost->source_index >= 0)
808         ist = input_streams[ost->source_index];
809
810     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
811         duration = 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base));
812
813     sync_ipts = in_picture->pts;
814     delta = sync_ipts - ost->sync_opts + duration;
815
816     /* by default, we output a single frame */
817     nb_frames = 1;
818
819     format_video_sync = video_sync_method;
820     if (format_video_sync == VSYNC_AUTO) {
821         format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : VSYNC_CFR;
822         if (   ist
823             && format_video_sync == VSYNC_CFR
824             && input_files[ist->file_index]->ctx->nb_streams == 1
825             && input_files[ist->file_index]->input_ts_offset == 0) {
826             format_video_sync = VSYNC_VSCFR;
827         }
828         if (format_video_sync == VSYNC_CFR && copy_ts) {
829             format_video_sync = VSYNC_VSCFR;
830         }
831     }
832
833     switch (format_video_sync) {
834     case VSYNC_VSCFR:
835         if (ost->frame_number == 0 && delta - duration >= 0.5) {
836             av_log(NULL, AV_LOG_DEBUG, "Not duplicating %d initial frames\n", (int)lrintf(delta - duration));
837             delta = duration;
838             ost->sync_opts = lrint(sync_ipts);
839         }
840     case VSYNC_CFR:
841         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
842         if (delta < -1.1)
843             nb_frames = 0;
844         else if (delta > 1.1)
845             nb_frames = lrintf(delta);
846         break;
847     case VSYNC_VFR:
848         if (delta <= -0.6)
849             nb_frames = 0;
850         else if (delta > 0.6)
851             ost->sync_opts = lrint(sync_ipts);
852         break;
853     case VSYNC_DROP:
854     case VSYNC_PASSTHROUGH:
855         ost->sync_opts = lrint(sync_ipts);
856         break;
857     default:
858         av_assert0(0);
859     }
860
861     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
862     if (nb_frames == 0) {
863         nb_frames_drop++;
864         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
865         return;
866     } else if (nb_frames > 1) {
867         if (nb_frames > dts_error_threshold * 30) {
868             av_log(NULL, AV_LOG_ERROR, "%d frame duplication too large, skipping\n", nb_frames - 1);
869             nb_frames_drop++;
870             return;
871         }
872         nb_frames_dup += nb_frames - 1;
873         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
874     }
875
876   /* duplicates frame if needed */
877   for (i = 0; i < nb_frames; i++) {
878     av_init_packet(&pkt);
879     pkt.data = NULL;
880     pkt.size = 0;
881
882     in_picture->pts = ost->sync_opts;
883
884 #if 1
885     if (!check_recording_time(ost))
886 #else
887     if (ost->frame_number >= ost->max_frames)
888 #endif
889         return;
890
891     if (s->oformat->flags & AVFMT_RAWPICTURE &&
892         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
893         /* raw pictures are written as AVPicture structure to
894            avoid any copies. We support temporarily the older
895            method. */
896         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
897         enc->coded_frame->top_field_first  = in_picture->top_field_first;
898         if (enc->coded_frame->interlaced_frame)
899             enc->field_order = enc->coded_frame->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
900         else
901             enc->field_order = AV_FIELD_PROGRESSIVE;
902         pkt.data   = (uint8_t *)in_picture;
903         pkt.size   =  sizeof(AVPicture);
904         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
905         pkt.flags |= AV_PKT_FLAG_KEY;
906
907         video_size += pkt.size;
908         write_frame(s, &pkt, ost);
909     } else {
910         int got_packet, forced_keyframe = 0;
911         double pts_time;
912
913         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME) &&
914             ost->top_field_first >= 0)
915             in_picture->top_field_first = !!ost->top_field_first;
916
917         if (in_picture->interlaced_frame) {
918             if (enc->codec->id == AV_CODEC_ID_MJPEG)
919                 enc->field_order = in_picture->top_field_first ? AV_FIELD_TT:AV_FIELD_BB;
920             else
921                 enc->field_order = in_picture->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
922         } else
923             enc->field_order = AV_FIELD_PROGRESSIVE;
924
925         in_picture->quality = ost->st->codec->global_quality;
926         if (!enc->me_threshold)
927             in_picture->pict_type = 0;
928
929         pts_time = in_picture->pts != AV_NOPTS_VALUE ?
930             in_picture->pts * av_q2d(enc->time_base) : NAN;
931         if (ost->forced_kf_index < ost->forced_kf_count &&
932             in_picture->pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
933             ost->forced_kf_index++;
934             forced_keyframe = 1;
935         } else if (ost->forced_keyframes_pexpr) {
936             double res;
937             ost->forced_keyframes_expr_const_values[FKF_T] = pts_time;
938             res = av_expr_eval(ost->forced_keyframes_pexpr,
939                                ost->forced_keyframes_expr_const_values, NULL);
940             av_dlog(NULL, "force_key_frame: n:%f n_forced:%f prev_forced_n:%f t:%f prev_forced_t:%f -> res:%f\n",
941                     ost->forced_keyframes_expr_const_values[FKF_N],
942                     ost->forced_keyframes_expr_const_values[FKF_N_FORCED],
943                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N],
944                     ost->forced_keyframes_expr_const_values[FKF_T],
945                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T],
946                     res);
947             if (res) {
948                 forced_keyframe = 1;
949                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] =
950                     ost->forced_keyframes_expr_const_values[FKF_N];
951                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] =
952                     ost->forced_keyframes_expr_const_values[FKF_T];
953                 ost->forced_keyframes_expr_const_values[FKF_N_FORCED] += 1;
954             }
955
956             ost->forced_keyframes_expr_const_values[FKF_N] += 1;
957         }
958         if (forced_keyframe) {
959             in_picture->pict_type = AV_PICTURE_TYPE_I;
960             av_log(NULL, AV_LOG_DEBUG, "Forced keyframe at time %f\n", pts_time);
961         }
962
963         update_benchmark(NULL);
964         ret = avcodec_encode_video2(enc, &pkt, in_picture, &got_packet);
965         update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
966         if (ret < 0) {
967             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
968             exit_program(1);
969         }
970
971         if (got_packet) {
972             if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
973                 pkt.pts = ost->sync_opts;
974
975             if (pkt.pts != AV_NOPTS_VALUE)
976                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
977             if (pkt.dts != AV_NOPTS_VALUE)
978                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
979
980             if (debug_ts) {
981                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
982                     "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
983                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
984                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
985             }
986
987             frame_size = pkt.size;
988             video_size += pkt.size;
989             write_frame(s, &pkt, ost);
990             av_free_packet(&pkt);
991
992             /* if two pass, output log */
993             if (ost->logfile && enc->stats_out) {
994                 fprintf(ost->logfile, "%s", enc->stats_out);
995             }
996         }
997     }
998     ost->sync_opts++;
999     /*
1000      * For video, number of frames in == number of packets out.
1001      * But there may be reordering, so we can't throw away frames on encoder
1002      * flush, we need to limit them here, before they go into encoder.
1003      */
1004     ost->frame_number++;
1005
1006     if (vstats_filename && frame_size)
1007         do_video_stats(ost, frame_size);
1008   }
1009 }
1010
1011 static double psnr(double d)
1012 {
1013     return -10.0 * log(d) / log(10.0);
1014 }
1015
1016 static void do_video_stats(OutputStream *ost, int frame_size)
1017 {
1018     AVCodecContext *enc;
1019     int frame_number;
1020     double ti1, bitrate, avg_bitrate;
1021
1022     /* this is executed just the first time do_video_stats is called */
1023     if (!vstats_file) {
1024         vstats_file = fopen(vstats_filename, "w");
1025         if (!vstats_file) {
1026             perror("fopen");
1027             exit_program(1);
1028         }
1029     }
1030
1031     enc = ost->st->codec;
1032     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1033         frame_number = ost->st->nb_frames;
1034         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1035         if (enc->flags&CODEC_FLAG_PSNR)
1036             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1037
1038         fprintf(vstats_file,"f_size= %6d ", frame_size);
1039         /* compute pts value */
1040         ti1 = ost->st->pts.val * av_q2d(enc->time_base);
1041         if (ti1 < 0.01)
1042             ti1 = 0.01;
1043
1044         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1045         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1046         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1047                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1048         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1049     }
1050 }
1051
1052 /**
1053  * Get and encode new output from any of the filtergraphs, without causing
1054  * activity.
1055  *
1056  * @return  0 for success, <0 for severe errors
1057  */
1058 static int reap_filters(void)
1059 {
1060     AVFrame *filtered_frame = NULL;
1061     int i;
1062     int64_t frame_pts;
1063
1064     /* Reap all buffers present in the buffer sinks */
1065     for (i = 0; i < nb_output_streams; i++) {
1066         OutputStream *ost = output_streams[i];
1067         OutputFile    *of = output_files[ost->file_index];
1068         int ret = 0;
1069
1070         if (!ost->filter)
1071             continue;
1072
1073         if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
1074             return AVERROR(ENOMEM);
1075         } else
1076             avcodec_get_frame_defaults(ost->filtered_frame);
1077         filtered_frame = ost->filtered_frame;
1078
1079         while (1) {
1080             ret = av_buffersink_get_frame_flags(ost->filter->filter, filtered_frame,
1081                                                AV_BUFFERSINK_FLAG_NO_REQUEST);
1082             if (ret < 0) {
1083                 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1084                     av_log(NULL, AV_LOG_WARNING,
1085                            "Error in av_buffersink_get_frame_flags(): %s\n", av_err2str(ret));
1086                 }
1087                 break;
1088             }
1089             frame_pts = AV_NOPTS_VALUE;
1090             if (filtered_frame->pts != AV_NOPTS_VALUE) {
1091                 int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1092                 filtered_frame->pts = frame_pts = av_rescale_q(filtered_frame->pts,
1093                                                 ost->filter->filter->inputs[0]->time_base,
1094                                                 ost->st->codec->time_base) -
1095                                     av_rescale_q(start_time,
1096                                                 AV_TIME_BASE_Q,
1097                                                 ost->st->codec->time_base);
1098             }
1099             //if (ost->source_index >= 0)
1100             //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1101
1102
1103             switch (ost->filter->filter->inputs[0]->type) {
1104             case AVMEDIA_TYPE_VIDEO:
1105                 filtered_frame->pts = frame_pts;
1106                 if (!ost->frame_aspect_ratio.num)
1107                     ost->st->codec->sample_aspect_ratio = filtered_frame->sample_aspect_ratio;
1108
1109                 do_video_out(of->ctx, ost, filtered_frame);
1110                 break;
1111             case AVMEDIA_TYPE_AUDIO:
1112                 filtered_frame->pts = frame_pts;
1113                 if (!(ost->st->codec->codec->capabilities & CODEC_CAP_PARAM_CHANGE) &&
1114                     ost->st->codec->channels != av_frame_get_channels(filtered_frame)) {
1115                     av_log(NULL, AV_LOG_ERROR,
1116                            "Audio filter graph output is not normalized and encoder does not support parameter changes\n");
1117                     break;
1118                 }
1119                 do_audio_out(of->ctx, ost, filtered_frame);
1120                 break;
1121             default:
1122                 // TODO support subtitle filters
1123                 av_assert0(0);
1124             }
1125
1126             av_frame_unref(filtered_frame);
1127         }
1128     }
1129
1130     return 0;
1131 }
1132
1133 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
1134 {
1135     char buf[1024];
1136     AVBPrint buf_script;
1137     OutputStream *ost;
1138     AVFormatContext *oc;
1139     int64_t total_size;
1140     AVCodecContext *enc;
1141     int frame_number, vid, i;
1142     double bitrate;
1143     int64_t pts = INT64_MIN;
1144     static int64_t last_time = -1;
1145     static int qp_histogram[52];
1146     int hours, mins, secs, us;
1147
1148     if (!print_stats && !is_last_report && !progress_avio)
1149         return;
1150
1151     if (!is_last_report) {
1152         if (last_time == -1) {
1153             last_time = cur_time;
1154             return;
1155         }
1156         if ((cur_time - last_time) < 500000)
1157             return;
1158         last_time = cur_time;
1159     }
1160
1161
1162     oc = output_files[0]->ctx;
1163
1164     total_size = avio_size(oc->pb);
1165     if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
1166         total_size = avio_tell(oc->pb);
1167
1168     buf[0] = '\0';
1169     vid = 0;
1170     av_bprint_init(&buf_script, 0, 1);
1171     for (i = 0; i < nb_output_streams; i++) {
1172         float q = -1;
1173         ost = output_streams[i];
1174         enc = ost->st->codec;
1175         if (!ost->stream_copy && enc->coded_frame)
1176             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1177         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1178             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1179             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1180                        ost->file_index, ost->index, q);
1181         }
1182         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1183             float fps, t = (cur_time-timer_start) / 1000000.0;
1184
1185             frame_number = ost->frame_number;
1186             fps = t > 1 ? frame_number / t : 0;
1187             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
1188                      frame_number, fps < 9.95, fps, q);
1189             av_bprintf(&buf_script, "frame=%d\n", frame_number);
1190             av_bprintf(&buf_script, "fps=%.1f\n", fps);
1191             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1192                        ost->file_index, ost->index, q);
1193             if (is_last_report)
1194                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1195             if (qp_hist) {
1196                 int j;
1197                 int qp = lrintf(q);
1198                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1199                     qp_histogram[qp]++;
1200                 for (j = 0; j < 32; j++)
1201                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
1202             }
1203             if ((enc->flags&CODEC_FLAG_PSNR) && (enc->coded_frame || is_last_report)) {
1204                 int j;
1205                 double error, error_sum = 0;
1206                 double scale, scale_sum = 0;
1207                 double p;
1208                 char type[3] = { 'Y','U','V' };
1209                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1210                 for (j = 0; j < 3; j++) {
1211                     if (is_last_report) {
1212                         error = enc->error[j];
1213                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1214                     } else {
1215                         error = enc->coded_frame->error[j];
1216                         scale = enc->width * enc->height * 255.0 * 255.0;
1217                     }
1218                     if (j)
1219                         scale /= 4;
1220                     error_sum += error;
1221                     scale_sum += scale;
1222                     p = psnr(error / scale);
1223                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], p);
1224                     av_bprintf(&buf_script, "stream_%d_%d_psnr_%c=%2.2f\n",
1225                                ost->file_index, ost->index, type[j] | 32, p);
1226                 }
1227                 p = psnr(error_sum / scale_sum);
1228                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1229                 av_bprintf(&buf_script, "stream_%d_%d_psnr_all=%2.2f\n",
1230                            ost->file_index, ost->index, p);
1231             }
1232             vid = 1;
1233         }
1234         /* compute min output value */
1235         if ((is_last_report || !ost->finished) && ost->st->pts.val != AV_NOPTS_VALUE)
1236             pts = FFMAX(pts, av_rescale_q(ost->st->pts.val,
1237                                           ost->st->time_base, AV_TIME_BASE_Q));
1238     }
1239
1240     secs = pts / AV_TIME_BASE;
1241     us = pts % AV_TIME_BASE;
1242     mins = secs / 60;
1243     secs %= 60;
1244     hours = mins / 60;
1245     mins %= 60;
1246
1247     bitrate = pts && total_size >= 0 ? total_size * 8 / (pts / 1000.0) : -1;
1248
1249     if (total_size < 0) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1250                                  "size=N/A time=");
1251     else                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1252                                  "size=%8.0fkB time=", total_size / 1024.0);
1253     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1254              "%02d:%02d:%02d.%02d ", hours, mins, secs,
1255              (100 * us) / AV_TIME_BASE);
1256     if (bitrate < 0) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1257                               "bitrate=N/A");
1258     else             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1259                               "bitrate=%6.1fkbits/s", bitrate);
1260     if (total_size < 0) av_bprintf(&buf_script, "total_size=N/A\n");
1261     else                av_bprintf(&buf_script, "total_size=%"PRId64"\n", total_size);
1262     av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
1263     av_bprintf(&buf_script, "out_time=%02d:%02d:%02d.%06d\n",
1264                hours, mins, secs, us);
1265
1266     if (nb_frames_dup || nb_frames_drop)
1267         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1268                 nb_frames_dup, nb_frames_drop);
1269     av_bprintf(&buf_script, "dup_frames=%d\n", nb_frames_dup);
1270     av_bprintf(&buf_script, "drop_frames=%d\n", nb_frames_drop);
1271
1272     if (print_stats || is_last_report) {
1273         if (print_stats==1 && AV_LOG_INFO > av_log_get_level()) {
1274             fprintf(stderr, "%s    \r", buf);
1275         } else
1276             av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1277
1278     fflush(stderr);
1279     }
1280
1281     if (progress_avio) {
1282         av_bprintf(&buf_script, "progress=%s\n",
1283                    is_last_report ? "end" : "continue");
1284         avio_write(progress_avio, buf_script.str,
1285                    FFMIN(buf_script.len, buf_script.size - 1));
1286         avio_flush(progress_avio);
1287         av_bprint_finalize(&buf_script, NULL);
1288         if (is_last_report) {
1289             avio_close(progress_avio);
1290             progress_avio = NULL;
1291         }
1292     }
1293
1294     if (is_last_report) {
1295         int64_t raw= audio_size + video_size + subtitle_size + extra_size;
1296         av_log(NULL, AV_LOG_INFO, "\n");
1297         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB subtitle:%1.0f global headers:%1.0fkB muxing overhead %f%%\n",
1298                video_size / 1024.0,
1299                audio_size / 1024.0,
1300                subtitle_size / 1024.0,
1301                extra_size / 1024.0,
1302                100.0 * (total_size - raw) / raw
1303         );
1304         if(video_size + audio_size + subtitle_size + extra_size == 0){
1305             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
1306         }
1307     }
1308 }
1309
1310 static void flush_encoders(void)
1311 {
1312     int i, ret;
1313
1314     for (i = 0; i < nb_output_streams; i++) {
1315         OutputStream   *ost = output_streams[i];
1316         AVCodecContext *enc = ost->st->codec;
1317         AVFormatContext *os = output_files[ost->file_index]->ctx;
1318         int stop_encoding = 0;
1319
1320         if (!ost->encoding_needed)
1321             continue;
1322
1323         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1324             continue;
1325         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
1326             continue;
1327
1328         for (;;) {
1329             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1330             const char *desc;
1331             int64_t *size;
1332
1333             switch (ost->st->codec->codec_type) {
1334             case AVMEDIA_TYPE_AUDIO:
1335                 encode = avcodec_encode_audio2;
1336                 desc   = "Audio";
1337                 size   = &audio_size;
1338                 break;
1339             case AVMEDIA_TYPE_VIDEO:
1340                 encode = avcodec_encode_video2;
1341                 desc   = "Video";
1342                 size   = &video_size;
1343                 break;
1344             default:
1345                 stop_encoding = 1;
1346             }
1347
1348             if (encode) {
1349                 AVPacket pkt;
1350                 int got_packet;
1351                 av_init_packet(&pkt);
1352                 pkt.data = NULL;
1353                 pkt.size = 0;
1354
1355                 update_benchmark(NULL);
1356                 ret = encode(enc, &pkt, NULL, &got_packet);
1357                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
1358                 if (ret < 0) {
1359                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1360                     exit_program(1);
1361                 }
1362                 *size += pkt.size;
1363                 if (ost->logfile && enc->stats_out) {
1364                     fprintf(ost->logfile, "%s", enc->stats_out);
1365                 }
1366                 if (!got_packet) {
1367                     stop_encoding = 1;
1368                     break;
1369                 }
1370                 if (pkt.pts != AV_NOPTS_VALUE)
1371                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1372                 if (pkt.dts != AV_NOPTS_VALUE)
1373                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1374                 if (pkt.duration > 0)
1375                     pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1376                 write_frame(os, &pkt, ost);
1377                 if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && vstats_filename) {
1378                     do_video_stats(ost, pkt.size);
1379                 }
1380             }
1381
1382             if (stop_encoding)
1383                 break;
1384         }
1385     }
1386 }
1387
1388 /*
1389  * Check whether a packet from ist should be written into ost at this time
1390  */
1391 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1392 {
1393     OutputFile *of = output_files[ost->file_index];
1394     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1395
1396     if (ost->source_index != ist_index)
1397         return 0;
1398
1399     if (of->start_time != AV_NOPTS_VALUE && ist->pts < of->start_time)
1400         return 0;
1401
1402     return 1;
1403 }
1404
1405 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1406 {
1407     OutputFile *of = output_files[ost->file_index];
1408     InputFile   *f = input_files [ist->file_index];
1409     int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1410     int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);
1411     int64_t ist_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ist->st->time_base);
1412     AVPicture pict;
1413     AVPacket opkt;
1414
1415     av_init_packet(&opkt);
1416
1417     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1418         !ost->copy_initial_nonkeyframes)
1419         return;
1420
1421     if (pkt->pts == AV_NOPTS_VALUE) {
1422         if (!ost->frame_number && ist->pts < start_time &&
1423             !ost->copy_prior_start)
1424             return;
1425     } else {
1426         if (!ost->frame_number && pkt->pts < ist_tb_start_time &&
1427             !ost->copy_prior_start)
1428             return;
1429     }
1430
1431     if (of->recording_time != INT64_MAX &&
1432         ist->pts >= of->recording_time + start_time) {
1433         close_output_stream(ost);
1434         return;
1435     }
1436
1437     if (f->recording_time != INT64_MAX) {
1438         start_time = f->ctx->start_time;
1439         if (f->start_time != AV_NOPTS_VALUE)
1440             start_time += f->start_time;
1441         if (ist->pts >= f->recording_time + start_time) {
1442             close_output_stream(ost);
1443             return;
1444         }
1445     }
1446
1447     /* force the input stream PTS */
1448     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1449         audio_size += pkt->size;
1450     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1451         video_size += pkt->size;
1452         ost->sync_opts++;
1453     } else if (ost->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1454         subtitle_size += pkt->size;
1455     }
1456
1457     if (pkt->pts != AV_NOPTS_VALUE)
1458         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1459     else
1460         opkt.pts = AV_NOPTS_VALUE;
1461
1462     if (pkt->dts == AV_NOPTS_VALUE)
1463         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
1464     else
1465         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1466     opkt.dts -= ost_tb_start_time;
1467
1468     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1469         int duration = av_get_audio_frame_duration(ist->st->codec, pkt->size);
1470         if(!duration)
1471             duration = ist->st->codec->frame_size;
1472         opkt.dts = opkt.pts = av_rescale_delta(ist->st->time_base, pkt->dts,
1473                                                (AVRational){1, ist->st->codec->sample_rate}, duration, &ist->filter_in_rescale_delta_last,
1474                                                ost->st->time_base) - ost_tb_start_time;
1475     }
1476
1477     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1478     opkt.flags    = pkt->flags;
1479
1480     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1481     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1482        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1483        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1484        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1485        ) {
1486         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY)) {
1487             opkt.buf = av_buffer_create(opkt.data, opkt.size, av_buffer_default_free, NULL, 0);
1488             if (!opkt.buf)
1489                 exit_program(1);
1490         }
1491     } else {
1492         opkt.data = pkt->data;
1493         opkt.size = pkt->size;
1494     }
1495
1496     if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (of->ctx->oformat->flags & AVFMT_RAWPICTURE)) {
1497         /* store AVPicture in AVPacket, as expected by the output format */
1498         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
1499         opkt.data = (uint8_t *)&pict;
1500         opkt.size = sizeof(AVPicture);
1501         opkt.flags |= AV_PKT_FLAG_KEY;
1502     }
1503
1504     write_frame(of->ctx, &opkt, ost);
1505     ost->st->codec->frame_number++;
1506 }
1507
1508 int guess_input_channel_layout(InputStream *ist)
1509 {
1510     AVCodecContext *dec = ist->st->codec;
1511
1512     if (!dec->channel_layout) {
1513         char layout_name[256];
1514
1515         if (dec->channels > ist->guess_layout_max)
1516             return 0;
1517         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1518         if (!dec->channel_layout)
1519             return 0;
1520         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1521                                      dec->channels, dec->channel_layout);
1522         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1523                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1524     }
1525     return 1;
1526 }
1527
1528 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1529 {
1530     AVFrame *decoded_frame, *f;
1531     AVCodecContext *avctx = ist->st->codec;
1532     int i, ret, err = 0, resample_changed;
1533     AVRational decoded_frame_tb;
1534
1535     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1536         return AVERROR(ENOMEM);
1537     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1538         return AVERROR(ENOMEM);
1539     decoded_frame = ist->decoded_frame;
1540
1541     update_benchmark(NULL);
1542     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1543     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
1544
1545     if (ret >= 0 && avctx->sample_rate <= 0) {
1546         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
1547         ret = AVERROR_INVALIDDATA;
1548     }
1549
1550     if (*got_output || ret<0 || pkt->size)
1551         decode_error_stat[ret<0] ++;
1552
1553     if (!*got_output || ret < 0) {
1554         if (!pkt->size) {
1555             for (i = 0; i < ist->nb_filters; i++)
1556 #if 1
1557                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1558 #else
1559                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
1560 #endif
1561         }
1562         return ret;
1563     }
1564
1565 #if 1
1566     /* increment next_dts to use for the case where the input stream does not
1567        have timestamps or there are multiple frames in the packet */
1568     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1569                      avctx->sample_rate;
1570     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1571                      avctx->sample_rate;
1572 #endif
1573
1574     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1575                        ist->resample_channels       != avctx->channels               ||
1576                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1577                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1578     if (resample_changed) {
1579         char layout1[64], layout2[64];
1580
1581         if (!guess_input_channel_layout(ist)) {
1582             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1583                    "layout for Input Stream #%d.%d\n", ist->file_index,
1584                    ist->st->index);
1585             exit_program(1);
1586         }
1587         decoded_frame->channel_layout = avctx->channel_layout;
1588
1589         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1590                                      ist->resample_channel_layout);
1591         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1592                                      decoded_frame->channel_layout);
1593
1594         av_log(NULL, AV_LOG_INFO,
1595                "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",
1596                ist->file_index, ist->st->index,
1597                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1598                ist->resample_channels, layout1,
1599                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1600                avctx->channels, layout2);
1601
1602         ist->resample_sample_fmt     = decoded_frame->format;
1603         ist->resample_sample_rate    = decoded_frame->sample_rate;
1604         ist->resample_channel_layout = decoded_frame->channel_layout;
1605         ist->resample_channels       = avctx->channels;
1606
1607         for (i = 0; i < nb_filtergraphs; i++)
1608             if (ist_in_filtergraph(filtergraphs[i], ist)) {
1609                 FilterGraph *fg = filtergraphs[i];
1610                 int j;
1611                 if (configure_filtergraph(fg) < 0) {
1612                     av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1613                     exit_program(1);
1614                 }
1615                 for (j = 0; j < fg->nb_outputs; j++) {
1616                     OutputStream *ost = fg->outputs[j]->ost;
1617                     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1618                         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1619                         av_buffersink_set_frame_size(ost->filter->filter,
1620                                                      ost->st->codec->frame_size);
1621                 }
1622             }
1623     }
1624
1625     /* if the decoder provides a pts, use it instead of the last packet pts.
1626        the decoder could be delaying output by a packet or more. */
1627     if (decoded_frame->pts != AV_NOPTS_VALUE) {
1628         ist->dts = ist->next_dts = ist->pts = ist->next_pts = av_rescale_q(decoded_frame->pts, avctx->time_base, AV_TIME_BASE_Q);
1629         decoded_frame_tb   = avctx->time_base;
1630     } else if (decoded_frame->pkt_pts != AV_NOPTS_VALUE) {
1631         decoded_frame->pts = decoded_frame->pkt_pts;
1632         pkt->pts           = AV_NOPTS_VALUE;
1633         decoded_frame_tb   = ist->st->time_base;
1634     } else if (pkt->pts != AV_NOPTS_VALUE) {
1635         decoded_frame->pts = pkt->pts;
1636         pkt->pts           = AV_NOPTS_VALUE;
1637         decoded_frame_tb   = ist->st->time_base;
1638     }else {
1639         decoded_frame->pts = ist->dts;
1640         decoded_frame_tb   = AV_TIME_BASE_Q;
1641     }
1642     if (decoded_frame->pts != AV_NOPTS_VALUE)
1643         decoded_frame->pts = av_rescale_delta(decoded_frame_tb, decoded_frame->pts,
1644                                               (AVRational){1, ist->st->codec->sample_rate}, decoded_frame->nb_samples, &ist->filter_in_rescale_delta_last,
1645                                               (AVRational){1, ist->st->codec->sample_rate});
1646     for (i = 0; i < ist->nb_filters; i++) {
1647         if (i < ist->nb_filters - 1) {
1648             f = ist->filter_frame;
1649             err = av_frame_ref(f, decoded_frame);
1650             if (err < 0)
1651                 break;
1652         } else
1653             f = decoded_frame;
1654         err = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f,
1655                                      AV_BUFFERSRC_FLAG_PUSH);
1656         if (err == AVERROR_EOF)
1657             err = 0; /* ignore */
1658         if (err < 0)
1659             break;
1660     }
1661     decoded_frame->pts = AV_NOPTS_VALUE;
1662
1663     av_frame_unref(ist->filter_frame);
1664     av_frame_unref(decoded_frame);
1665     return err < 0 ? err : ret;
1666 }
1667
1668 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1669 {
1670     AVFrame *decoded_frame, *f;
1671     void *buffer_to_free = NULL;
1672     int i, ret = 0, err = 0, resample_changed;
1673     int64_t best_effort_timestamp;
1674     AVRational *frame_sample_aspect;
1675
1676     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1677         return AVERROR(ENOMEM);
1678     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1679         return AVERROR(ENOMEM);
1680     decoded_frame = ist->decoded_frame;
1681     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
1682
1683     update_benchmark(NULL);
1684     ret = avcodec_decode_video2(ist->st->codec,
1685                                 decoded_frame, got_output, pkt);
1686     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
1687
1688     if (*got_output || ret<0 || pkt->size)
1689         decode_error_stat[ret<0] ++;
1690
1691     if (!*got_output || ret < 0) {
1692         if (!pkt->size) {
1693             for (i = 0; i < ist->nb_filters; i++)
1694 #if 1
1695                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1696 #else
1697                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
1698 #endif
1699         }
1700         return ret;
1701     }
1702
1703     if(ist->top_field_first>=0)
1704         decoded_frame->top_field_first = ist->top_field_first;
1705
1706     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
1707     if(best_effort_timestamp != AV_NOPTS_VALUE)
1708         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
1709
1710     if (debug_ts) {
1711         av_log(NULL, AV_LOG_INFO, "decoder -> ist_index:%d type:video "
1712                 "frame_pts:%s frame_pts_time:%s best_effort_ts:%"PRId64" best_effort_ts_time:%s keyframe:%d frame_type:%d \n",
1713                 ist->st->index, av_ts2str(decoded_frame->pts),
1714                 av_ts2timestr(decoded_frame->pts, &ist->st->time_base),
1715                 best_effort_timestamp,
1716                 av_ts2timestr(best_effort_timestamp, &ist->st->time_base),
1717                 decoded_frame->key_frame, decoded_frame->pict_type);
1718     }
1719
1720     pkt->size = 0;
1721
1722     if (ist->st->sample_aspect_ratio.num)
1723         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1724
1725     resample_changed = ist->resample_width   != decoded_frame->width  ||
1726                        ist->resample_height  != decoded_frame->height ||
1727                        ist->resample_pix_fmt != decoded_frame->format;
1728     if (resample_changed) {
1729         av_log(NULL, AV_LOG_INFO,
1730                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1731                ist->file_index, ist->st->index,
1732                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1733                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1734
1735         ist->resample_width   = decoded_frame->width;
1736         ist->resample_height  = decoded_frame->height;
1737         ist->resample_pix_fmt = decoded_frame->format;
1738
1739         for (i = 0; i < nb_filtergraphs; i++) {
1740             if (ist_in_filtergraph(filtergraphs[i], ist) && ist->reinit_filters &&
1741                 configure_filtergraph(filtergraphs[i]) < 0) {
1742                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1743                 exit_program(1);
1744             }
1745         }
1746     }
1747
1748     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
1749     for (i = 0; i < ist->nb_filters; i++) {
1750         if (!frame_sample_aspect->num)
1751             *frame_sample_aspect = ist->st->sample_aspect_ratio;
1752
1753         if (i < ist->nb_filters - 1) {
1754             f = ist->filter_frame;
1755             err = av_frame_ref(f, decoded_frame);
1756             if (err < 0)
1757                 break;
1758         } else
1759             f = decoded_frame;
1760         ret = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f, AV_BUFFERSRC_FLAG_PUSH);
1761         if (ret == AVERROR_EOF) {
1762             ret = 0; /* ignore */
1763         } else if (ret < 0) {
1764             av_log(NULL, AV_LOG_FATAL,
1765                    "Failed to inject frame into filter network: %s\n", av_err2str(ret));
1766             exit_program(1);
1767         }
1768     }
1769
1770     av_frame_unref(ist->filter_frame);
1771     av_frame_unref(decoded_frame);
1772     av_free(buffer_to_free);
1773     return err < 0 ? err : ret;
1774 }
1775
1776 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1777 {
1778     AVSubtitle subtitle;
1779     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1780                                           &subtitle, got_output, pkt);
1781
1782     if (*got_output || ret<0 || pkt->size)
1783         decode_error_stat[ret<0] ++;
1784
1785     if (ret < 0 || !*got_output) {
1786         if (!pkt->size)
1787             sub2video_flush(ist);
1788         return ret;
1789     }
1790
1791     if (ist->fix_sub_duration) {
1792         if (ist->prev_sub.got_output) {
1793             int end = av_rescale(subtitle.pts - ist->prev_sub.subtitle.pts,
1794                                  1000, AV_TIME_BASE);
1795             if (end < ist->prev_sub.subtitle.end_display_time) {
1796                 av_log(ist->st->codec, AV_LOG_DEBUG,
1797                        "Subtitle duration reduced from %d to %d\n",
1798                        ist->prev_sub.subtitle.end_display_time, end);
1799                 ist->prev_sub.subtitle.end_display_time = end;
1800             }
1801         }
1802         FFSWAP(int,        *got_output, ist->prev_sub.got_output);
1803         FFSWAP(int,        ret,         ist->prev_sub.ret);
1804         FFSWAP(AVSubtitle, subtitle,    ist->prev_sub.subtitle);
1805     }
1806
1807     sub2video_update(ist, &subtitle);
1808
1809     if (!*got_output || !subtitle.num_rects)
1810         return ret;
1811
1812     for (i = 0; i < nb_output_streams; i++) {
1813         OutputStream *ost = output_streams[i];
1814
1815         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1816             continue;
1817
1818         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle);
1819     }
1820
1821     avsubtitle_free(&subtitle);
1822     return ret;
1823 }
1824
1825 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1826 static int output_packet(InputStream *ist, const AVPacket *pkt)
1827 {
1828     int ret = 0, i;
1829     int got_output = 0;
1830
1831     AVPacket avpkt;
1832     if (!ist->saw_first_ts) {
1833         ist->dts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
1834         ist->pts = 0;
1835         if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
1836             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
1837             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
1838         }
1839         ist->saw_first_ts = 1;
1840     }
1841
1842     if (ist->next_dts == AV_NOPTS_VALUE)
1843         ist->next_dts = ist->dts;
1844     if (ist->next_pts == AV_NOPTS_VALUE)
1845         ist->next_pts = ist->pts;
1846
1847     if (pkt == NULL) {
1848         /* EOF handling */
1849         av_init_packet(&avpkt);
1850         avpkt.data = NULL;
1851         avpkt.size = 0;
1852         goto handle_eof;
1853     } else {
1854         avpkt = *pkt;
1855     }
1856
1857     if (pkt->dts != AV_NOPTS_VALUE) {
1858         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1859         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
1860             ist->next_pts = ist->pts = ist->dts;
1861     }
1862
1863     // while we have more to decode or while the decoder did output something on EOF
1864     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1865         int duration;
1866     handle_eof:
1867
1868         ist->pts = ist->next_pts;
1869         ist->dts = ist->next_dts;
1870
1871         if (avpkt.size && avpkt.size != pkt->size) {
1872             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1873                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1874             ist->showed_multi_packet_warning = 1;
1875         }
1876
1877         switch (ist->st->codec->codec_type) {
1878         case AVMEDIA_TYPE_AUDIO:
1879             ret = decode_audio    (ist, &avpkt, &got_output);
1880             break;
1881         case AVMEDIA_TYPE_VIDEO:
1882             ret = decode_video    (ist, &avpkt, &got_output);
1883             if (avpkt.duration) {
1884                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1885             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
1886                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
1887                 duration = ((int64_t)AV_TIME_BASE *
1888                                 ist->st->codec->time_base.num * ticks) /
1889                                 ist->st->codec->time_base.den;
1890             } else
1891                 duration = 0;
1892
1893             if(ist->dts != AV_NOPTS_VALUE && duration) {
1894                 ist->next_dts += duration;
1895             }else
1896                 ist->next_dts = AV_NOPTS_VALUE;
1897
1898             if (got_output)
1899                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
1900             break;
1901         case AVMEDIA_TYPE_SUBTITLE:
1902             ret = transcode_subtitles(ist, &avpkt, &got_output);
1903             break;
1904         default:
1905             return -1;
1906         }
1907
1908         if (ret < 0)
1909             return ret;
1910
1911         avpkt.dts=
1912         avpkt.pts= AV_NOPTS_VALUE;
1913
1914         // touch data and size only if not EOF
1915         if (pkt) {
1916             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
1917                 ret = avpkt.size;
1918             avpkt.data += ret;
1919             avpkt.size -= ret;
1920         }
1921         if (!got_output) {
1922             continue;
1923         }
1924     }
1925
1926     /* handle stream copy */
1927     if (!ist->decoding_needed) {
1928         ist->dts = ist->next_dts;
1929         switch (ist->st->codec->codec_type) {
1930         case AVMEDIA_TYPE_AUDIO:
1931             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1932                              ist->st->codec->sample_rate;
1933             break;
1934         case AVMEDIA_TYPE_VIDEO:
1935             if (ist->framerate.num) {
1936                 // TODO: Remove work-around for c99-to-c89 issue 7
1937                 AVRational time_base_q = AV_TIME_BASE_Q;
1938                 int64_t next_dts = av_rescale_q(ist->next_dts, time_base_q, av_inv_q(ist->framerate));
1939                 ist->next_dts = av_rescale_q(next_dts + 1, av_inv_q(ist->framerate), time_base_q);
1940             } else if (pkt->duration) {
1941                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
1942             } else if(ist->st->codec->time_base.num != 0) {
1943                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
1944                 ist->next_dts += ((int64_t)AV_TIME_BASE *
1945                                   ist->st->codec->time_base.num * ticks) /
1946                                   ist->st->codec->time_base.den;
1947             }
1948             break;
1949         }
1950         ist->pts = ist->dts;
1951         ist->next_pts = ist->next_dts;
1952     }
1953     for (i = 0; pkt && i < nb_output_streams; i++) {
1954         OutputStream *ost = output_streams[i];
1955
1956         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1957             continue;
1958
1959         do_streamcopy(ist, ost, pkt);
1960     }
1961
1962     return 0;
1963 }
1964
1965 static void print_sdp(void)
1966 {
1967     char sdp[16384];
1968     int i;
1969     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
1970
1971     if (!avc)
1972         exit_program(1);
1973     for (i = 0; i < nb_output_files; i++)
1974         avc[i] = output_files[i]->ctx;
1975
1976     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
1977     printf("SDP:\n%s\n", sdp);
1978     fflush(stdout);
1979     av_freep(&avc);
1980 }
1981
1982 static int init_input_stream(int ist_index, char *error, int error_len)
1983 {
1984     int ret;
1985     InputStream *ist = input_streams[ist_index];
1986
1987     if (ist->decoding_needed) {
1988         AVCodec *codec = ist->dec;
1989         if (!codec) {
1990             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
1991                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
1992             return AVERROR(EINVAL);
1993         }
1994
1995         av_opt_set_int(ist->st->codec, "refcounted_frames", 1, 0);
1996
1997         if (!av_dict_get(ist->opts, "threads", NULL, 0))
1998             av_dict_set(&ist->opts, "threads", "auto", 0);
1999         if ((ret = avcodec_open2(ist->st->codec, codec, &ist->opts)) < 0) {
2000             char errbuf[128];
2001             if (ret == AVERROR_EXPERIMENTAL)
2002                 abort_codec_experimental(codec, 0);
2003
2004             av_strerror(ret, errbuf, sizeof(errbuf));
2005
2006             snprintf(error, error_len,
2007                      "Error while opening decoder for input stream "
2008                      "#%d:%d : %s",
2009                      ist->file_index, ist->st->index, errbuf);
2010             return ret;
2011         }
2012         assert_avoptions(ist->opts);
2013     }
2014
2015     ist->next_pts = AV_NOPTS_VALUE;
2016     ist->next_dts = AV_NOPTS_VALUE;
2017     ist->is_start = 1;
2018
2019     return 0;
2020 }
2021
2022 static InputStream *get_input_stream(OutputStream *ost)
2023 {
2024     if (ost->source_index >= 0)
2025         return input_streams[ost->source_index];
2026     return NULL;
2027 }
2028
2029 static int compare_int64(const void *a, const void *b)
2030 {
2031     int64_t va = *(int64_t *)a, vb = *(int64_t *)b;
2032     return va < vb ? -1 : va > vb ? +1 : 0;
2033 }
2034
2035 static void parse_forced_key_frames(char *kf, OutputStream *ost,
2036                                     AVCodecContext *avctx)
2037 {
2038     char *p;
2039     int n = 1, i, size, index = 0;
2040     int64_t t, *pts;
2041
2042     for (p = kf; *p; p++)
2043         if (*p == ',')
2044             n++;
2045     size = n;
2046     pts = av_malloc(sizeof(*pts) * size);
2047     if (!pts) {
2048         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
2049         exit_program(1);
2050     }
2051
2052     p = kf;
2053     for (i = 0; i < n; i++) {
2054         char *next = strchr(p, ',');
2055
2056         if (next)
2057             *next++ = 0;
2058
2059         if (!memcmp(p, "chapters", 8)) {
2060
2061             AVFormatContext *avf = output_files[ost->file_index]->ctx;
2062             int j;
2063
2064             if (avf->nb_chapters > INT_MAX - size ||
2065                 !(pts = av_realloc_f(pts, size += avf->nb_chapters - 1,
2066                                      sizeof(*pts)))) {
2067                 av_log(NULL, AV_LOG_FATAL,
2068                        "Could not allocate forced key frames array.\n");
2069                 exit_program(1);
2070             }
2071             t = p[8] ? parse_time_or_die("force_key_frames", p + 8, 1) : 0;
2072             t = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2073
2074             for (j = 0; j < avf->nb_chapters; j++) {
2075                 AVChapter *c = avf->chapters[j];
2076                 av_assert1(index < size);
2077                 pts[index++] = av_rescale_q(c->start, c->time_base,
2078                                             avctx->time_base) + t;
2079             }
2080
2081         } else {
2082
2083             t = parse_time_or_die("force_key_frames", p, 1);
2084             av_assert1(index < size);
2085             pts[index++] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2086
2087         }
2088
2089         p = next;
2090     }
2091
2092     av_assert0(index == size);
2093     qsort(pts, size, sizeof(*pts), compare_int64);
2094     ost->forced_kf_count = size;
2095     ost->forced_kf_pts   = pts;
2096 }
2097
2098 static void report_new_stream(int input_index, AVPacket *pkt)
2099 {
2100     InputFile *file = input_files[input_index];
2101     AVStream *st = file->ctx->streams[pkt->stream_index];
2102
2103     if (pkt->stream_index < file->nb_streams_warn)
2104         return;
2105     av_log(file->ctx, AV_LOG_WARNING,
2106            "New %s stream %d:%d at pos:%"PRId64" and DTS:%ss\n",
2107            av_get_media_type_string(st->codec->codec_type),
2108            input_index, pkt->stream_index,
2109            pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
2110     file->nb_streams_warn = pkt->stream_index + 1;
2111 }
2112
2113 static int transcode_init(void)
2114 {
2115     int ret = 0, i, j, k;
2116     AVFormatContext *oc;
2117     AVCodecContext *codec;
2118     OutputStream *ost;
2119     InputStream *ist;
2120     char error[1024];
2121     int want_sdp = 1;
2122
2123     for (i = 0; i < nb_filtergraphs; i++) {
2124         FilterGraph *fg = filtergraphs[i];
2125         for (j = 0; j < fg->nb_outputs; j++) {
2126             OutputFilter *ofilter = fg->outputs[j];
2127             if (!ofilter->ost || ofilter->ost->source_index >= 0)
2128                 continue;
2129             if (fg->nb_inputs != 1)
2130                 continue;
2131             for (k = nb_input_streams-1; k >= 0 ; k--)
2132                 if (fg->inputs[0]->ist == input_streams[k])
2133                     break;
2134             ofilter->ost->source_index = k;
2135         }
2136     }
2137
2138     /* init framerate emulation */
2139     for (i = 0; i < nb_input_files; i++) {
2140         InputFile *ifile = input_files[i];
2141         if (ifile->rate_emu)
2142             for (j = 0; j < ifile->nb_streams; j++)
2143                 input_streams[j + ifile->ist_index]->start = av_gettime();
2144     }
2145
2146     /* output stream init */
2147     for (i = 0; i < nb_output_files; i++) {
2148         oc = output_files[i]->ctx;
2149         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2150             av_dump_format(oc, i, oc->filename, 1);
2151             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2152             return AVERROR(EINVAL);
2153         }
2154     }
2155
2156     /* init complex filtergraphs */
2157     for (i = 0; i < nb_filtergraphs; i++)
2158         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2159             return ret;
2160
2161     /* for each output stream, we compute the right encoding parameters */
2162     for (i = 0; i < nb_output_streams; i++) {
2163         AVCodecContext *icodec = NULL;
2164         ost = output_streams[i];
2165         oc  = output_files[ost->file_index]->ctx;
2166         ist = get_input_stream(ost);
2167
2168         if (ost->attachment_filename)
2169             continue;
2170
2171         codec  = ost->st->codec;
2172
2173         if (ist) {
2174             icodec = ist->st->codec;
2175
2176             ost->st->disposition          = ist->st->disposition;
2177             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2178             codec->chroma_sample_location = icodec->chroma_sample_location;
2179         } else {
2180             for (j=0; j<oc->nb_streams; j++) {
2181                 AVStream *st = oc->streams[j];
2182                 if (st != ost->st && st->codec->codec_type == codec->codec_type)
2183                     break;
2184             }
2185             if (j == oc->nb_streams)
2186                 if (codec->codec_type == AVMEDIA_TYPE_AUDIO || codec->codec_type == AVMEDIA_TYPE_VIDEO)
2187                     ost->st->disposition = AV_DISPOSITION_DEFAULT;
2188         }
2189
2190         if (ost->stream_copy) {
2191             AVRational sar;
2192             uint64_t extra_size;
2193
2194             av_assert0(ist && !ost->filter);
2195
2196             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2197
2198             if (extra_size > INT_MAX) {
2199                 return AVERROR(EINVAL);
2200             }
2201
2202             /* if stream_copy is selected, no need to decode or encode */
2203             codec->codec_id   = icodec->codec_id;
2204             codec->codec_type = icodec->codec_type;
2205
2206             if (!codec->codec_tag) {
2207                 unsigned int codec_tag;
2208                 if (!oc->oformat->codec_tag ||
2209                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2210                      !av_codec_get_tag2(oc->oformat->codec_tag, icodec->codec_id, &codec_tag))
2211                     codec->codec_tag = icodec->codec_tag;
2212             }
2213
2214             codec->bit_rate       = icodec->bit_rate;
2215             codec->rc_max_rate    = icodec->rc_max_rate;
2216             codec->rc_buffer_size = icodec->rc_buffer_size;
2217             codec->field_order    = icodec->field_order;
2218             codec->extradata      = av_mallocz(extra_size);
2219             if (!codec->extradata) {
2220                 return AVERROR(ENOMEM);
2221             }
2222             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2223             codec->extradata_size= icodec->extradata_size;
2224             codec->bits_per_coded_sample  = icodec->bits_per_coded_sample;
2225
2226             codec->time_base = ist->st->time_base;
2227             /*
2228              * Avi is a special case here because it supports variable fps but
2229              * having the fps and timebase differe significantly adds quite some
2230              * overhead
2231              */
2232             if(!strcmp(oc->oformat->name, "avi")) {
2233                 if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
2234                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
2235                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(icodec->time_base)
2236                                && av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(icodec->time_base) < 1.0/500
2237                      || copy_tb==2){
2238                     codec->time_base.num = ist->st->r_frame_rate.den;
2239                     codec->time_base.den = 2*ist->st->r_frame_rate.num;
2240                     codec->ticks_per_frame = 2;
2241                 } else if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2242                                  && av_q2d(ist->st->time_base) < 1.0/500
2243                     || copy_tb==0){
2244                     codec->time_base = icodec->time_base;
2245                     codec->time_base.num *= icodec->ticks_per_frame;
2246                     codec->time_base.den *= 2;
2247                     codec->ticks_per_frame = 2;
2248                 }
2249             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2250                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2251                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2252                       && strcmp(oc->oformat->name, "f4v")
2253             ) {
2254                 if(   copy_tb<0 && icodec->time_base.den
2255                                 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
2256                                 && av_q2d(ist->st->time_base) < 1.0/500
2257                    || copy_tb==0){
2258                     codec->time_base = icodec->time_base;
2259                     codec->time_base.num *= icodec->ticks_per_frame;
2260                 }
2261             }
2262             if (   codec->codec_tag == AV_RL32("tmcd")
2263                 && icodec->time_base.num < icodec->time_base.den
2264                 && icodec->time_base.num > 0
2265                 && 121LL*icodec->time_base.num > icodec->time_base.den) {
2266                 codec->time_base = icodec->time_base;
2267             }
2268
2269             if (ist && !ost->frame_rate.num)
2270                 ost->frame_rate = ist->framerate;
2271             if(ost->frame_rate.num)
2272                 codec->time_base = av_inv_q(ost->frame_rate);
2273
2274             av_reduce(&codec->time_base.num, &codec->time_base.den,
2275                         codec->time_base.num, codec->time_base.den, INT_MAX);
2276
2277             switch (codec->codec_type) {
2278             case AVMEDIA_TYPE_AUDIO:
2279                 if (audio_volume != 256) {
2280                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2281                     exit_program(1);
2282                 }
2283                 codec->channel_layout     = icodec->channel_layout;
2284                 codec->sample_rate        = icodec->sample_rate;
2285                 codec->channels           = icodec->channels;
2286                 codec->frame_size         = icodec->frame_size;
2287                 codec->audio_service_type = icodec->audio_service_type;
2288                 codec->block_align        = icodec->block_align;
2289                 if((codec->block_align == 1 || codec->block_align == 1152 || codec->block_align == 576) && codec->codec_id == AV_CODEC_ID_MP3)
2290                     codec->block_align= 0;
2291                 if(codec->codec_id == AV_CODEC_ID_AC3)
2292                     codec->block_align= 0;
2293                 break;
2294             case AVMEDIA_TYPE_VIDEO:
2295                 codec->pix_fmt            = icodec->pix_fmt;
2296                 codec->width              = icodec->width;
2297                 codec->height             = icodec->height;
2298                 codec->has_b_frames       = icodec->has_b_frames;
2299                 if (ost->frame_aspect_ratio.num) { // overridden by the -aspect cli option
2300                     sar =
2301                         av_mul_q(ost->frame_aspect_ratio,
2302                                  (AVRational){ codec->height, codec->width });
2303                     av_log(NULL, AV_LOG_WARNING, "Overriding aspect ratio "
2304                            "with stream copy may produce invalid files\n");
2305                 }
2306                 else if (ist->st->sample_aspect_ratio.num)
2307                     sar = ist->st->sample_aspect_ratio;
2308                 else
2309                     sar = icodec->sample_aspect_ratio;
2310                 ost->st->sample_aspect_ratio = codec->sample_aspect_ratio = sar;
2311                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2312                 break;
2313             case AVMEDIA_TYPE_SUBTITLE:
2314                 codec->width  = icodec->width;
2315                 codec->height = icodec->height;
2316                 break;
2317             case AVMEDIA_TYPE_DATA:
2318             case AVMEDIA_TYPE_ATTACHMENT:
2319                 break;
2320             default:
2321                 abort();
2322             }
2323         } else {
2324             if (!ost->enc)
2325                 ost->enc = avcodec_find_encoder(codec->codec_id);
2326             if (!ost->enc) {
2327                 /* should only happen when a default codec is not present. */
2328                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
2329                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
2330                 ret = AVERROR(EINVAL);
2331                 goto dump_format;
2332             }
2333
2334             if (ist)
2335                 ist->decoding_needed++;
2336             ost->encoding_needed = 1;
2337
2338             if (!ost->filter &&
2339                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2340                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2341                     FilterGraph *fg;
2342                     fg = init_simple_filtergraph(ist, ost);
2343                     if (configure_filtergraph(fg)) {
2344                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2345                         exit_program(1);
2346                     }
2347             }
2348
2349             if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2350                 if (ost->filter && !ost->frame_rate.num)
2351                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
2352                 if (ist && !ost->frame_rate.num)
2353                     ost->frame_rate = ist->framerate;
2354                 if (ist && !ost->frame_rate.num)
2355                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
2356 //                    ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
2357                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2358                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2359                     ost->frame_rate = ost->enc->supported_framerates[idx];
2360                 }
2361             }
2362
2363             switch (codec->codec_type) {
2364             case AVMEDIA_TYPE_AUDIO:
2365                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2366                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2367                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2368                 codec->channels       = avfilter_link_get_channels(ost->filter->filter->inputs[0]);
2369                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2370                 break;
2371             case AVMEDIA_TYPE_VIDEO:
2372                 codec->time_base = av_inv_q(ost->frame_rate);
2373                 if (ost->filter && !(codec->time_base.num && codec->time_base.den))
2374                     codec->time_base = ost->filter->filter->inputs[0]->time_base;
2375                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
2376                    && (video_sync_method == VSYNC_CFR || video_sync_method == VSYNC_VSCFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
2377                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
2378                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
2379                 }
2380                 for (j = 0; j < ost->forced_kf_count; j++)
2381                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
2382                                                          AV_TIME_BASE_Q,
2383                                                          codec->time_base);
2384
2385                 codec->width  = ost->filter->filter->inputs[0]->w;
2386                 codec->height = ost->filter->filter->inputs[0]->h;
2387                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2388                     ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option
2389                     av_mul_q(ost->frame_aspect_ratio, (AVRational){ codec->height, codec->width }) :
2390                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2391                 if (!strncmp(ost->enc->name, "libx264", 7) &&
2392                     codec->pix_fmt == AV_PIX_FMT_NONE &&
2393                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2394                     av_log(NULL, AV_LOG_WARNING,
2395                            "No pixel format specified, %s for H.264 encoding chosen.\n"
2396                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2397                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2398                 if (!strncmp(ost->enc->name, "mpeg2video", 10) &&
2399                     codec->pix_fmt == AV_PIX_FMT_NONE &&
2400                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2401                     av_log(NULL, AV_LOG_WARNING,
2402                            "No pixel format specified, %s for MPEG-2 encoding chosen.\n"
2403                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2404                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2405                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2406
2407                 if (!icodec ||
2408                     codec->width   != icodec->width  ||
2409                     codec->height  != icodec->height ||
2410                     codec->pix_fmt != icodec->pix_fmt) {
2411                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
2412                 }
2413
2414                 if (ost->forced_keyframes) {
2415                     if (!strncmp(ost->forced_keyframes, "expr:", 5)) {
2416                         ret = av_expr_parse(&ost->forced_keyframes_pexpr, ost->forced_keyframes+5,
2417                                             forced_keyframes_const_names, NULL, NULL, NULL, NULL, 0, NULL);
2418                         if (ret < 0) {
2419                             av_log(NULL, AV_LOG_ERROR,
2420                                    "Invalid force_key_frames expression '%s'\n", ost->forced_keyframes+5);
2421                             return ret;
2422                         }
2423                         ost->forced_keyframes_expr_const_values[FKF_N] = 0;
2424                         ost->forced_keyframes_expr_const_values[FKF_N_FORCED] = 0;
2425                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] = NAN;
2426                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] = NAN;
2427                     } else {
2428                         parse_forced_key_frames(ost->forced_keyframes, ost, ost->st->codec);
2429                     }
2430                 }
2431                 break;
2432             case AVMEDIA_TYPE_SUBTITLE:
2433                 codec->time_base = (AVRational){1, 1000};
2434                 if (!codec->width) {
2435                     codec->width     = input_streams[ost->source_index]->st->codec->width;
2436                     codec->height    = input_streams[ost->source_index]->st->codec->height;
2437                 }
2438                 break;
2439             default:
2440                 abort();
2441                 break;
2442             }
2443             /* two pass mode */
2444             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
2445                 char logfilename[1024];
2446                 FILE *f;
2447
2448                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2449                          ost->logfile_prefix ? ost->logfile_prefix :
2450                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
2451                          i);
2452                 if (!strcmp(ost->enc->name, "libx264")) {
2453                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2454                 } else {
2455                     if (codec->flags & CODEC_FLAG_PASS2) {
2456                         char  *logbuffer;
2457                         size_t logbuffer_size;
2458                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2459                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2460                                    logfilename);
2461                             exit_program(1);
2462                         }
2463                         codec->stats_in = logbuffer;
2464                     }
2465                     if (codec->flags & CODEC_FLAG_PASS1) {
2466                         f = fopen(logfilename, "wb");
2467                         if (!f) {
2468                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2469                                 logfilename, strerror(errno));
2470                             exit_program(1);
2471                         }
2472                         ost->logfile = f;
2473                     }
2474                 }
2475             }
2476         }
2477     }
2478
2479     /* open each encoder */
2480     for (i = 0; i < nb_output_streams; i++) {
2481         ost = output_streams[i];
2482         if (ost->encoding_needed) {
2483             AVCodec      *codec = ost->enc;
2484             AVCodecContext *dec = NULL;
2485
2486             if ((ist = get_input_stream(ost)))
2487                 dec = ist->st->codec;
2488             if (dec && dec->subtitle_header) {
2489                 /* ASS code assumes this buffer is null terminated so add extra byte. */
2490                 ost->st->codec->subtitle_header = av_mallocz(dec->subtitle_header_size + 1);
2491                 if (!ost->st->codec->subtitle_header) {
2492                     ret = AVERROR(ENOMEM);
2493                     goto dump_format;
2494                 }
2495                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2496                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2497             }
2498             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2499                 av_dict_set(&ost->opts, "threads", "auto", 0);
2500             if ((ret = avcodec_open2(ost->st->codec, codec, &ost->opts)) < 0) {
2501                 if (ret == AVERROR_EXPERIMENTAL)
2502                     abort_codec_experimental(codec, 1);
2503                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2504                         ost->file_index, ost->index);
2505                 goto dump_format;
2506             }
2507             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2508                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
2509                 av_buffersink_set_frame_size(ost->filter->filter,
2510                                              ost->st->codec->frame_size);
2511             assert_avoptions(ost->opts);
2512             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2513                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2514                                              " It takes bits/s as argument, not kbits/s\n");
2515             extra_size += ost->st->codec->extradata_size;
2516
2517             if (ost->st->codec->me_threshold)
2518                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
2519         } else {
2520             av_opt_set_dict(ost->st->codec, &ost->opts);
2521         }
2522     }
2523
2524     /* init input streams */
2525     for (i = 0; i < nb_input_streams; i++)
2526         if ((ret = init_input_stream(i, error, sizeof(error))) < 0) {
2527             for (i = 0; i < nb_output_streams; i++) {
2528                 ost = output_streams[i];
2529                 avcodec_close(ost->st->codec);
2530             }
2531             goto dump_format;
2532         }
2533
2534     /* discard unused programs */
2535     for (i = 0; i < nb_input_files; i++) {
2536         InputFile *ifile = input_files[i];
2537         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2538             AVProgram *p = ifile->ctx->programs[j];
2539             int discard  = AVDISCARD_ALL;
2540
2541             for (k = 0; k < p->nb_stream_indexes; k++)
2542                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
2543                     discard = AVDISCARD_DEFAULT;
2544                     break;
2545                 }
2546             p->discard = discard;
2547         }
2548     }
2549
2550     /* open files and write file headers */
2551     for (i = 0; i < nb_output_files; i++) {
2552         oc = output_files[i]->ctx;
2553         oc->interrupt_callback = int_cb;
2554         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
2555             char errbuf[128];
2556             av_strerror(ret, errbuf, sizeof(errbuf));
2557             snprintf(error, sizeof(error),
2558                      "Could not write header for output file #%d "
2559                      "(incorrect codec parameters ?): %s",
2560                      i, errbuf);
2561             ret = AVERROR(EINVAL);
2562             goto dump_format;
2563         }
2564 //         assert_avoptions(output_files[i]->opts);
2565         if (strcmp(oc->oformat->name, "rtp")) {
2566             want_sdp = 0;
2567         }
2568     }
2569
2570  dump_format:
2571     /* dump the file output parameters - cannot be done before in case
2572        of stream copy */
2573     for (i = 0; i < nb_output_files; i++) {
2574         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
2575     }
2576
2577     /* dump the stream mapping */
2578     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2579     for (i = 0; i < nb_input_streams; i++) {
2580         ist = input_streams[i];
2581
2582         for (j = 0; j < ist->nb_filters; j++) {
2583             if (ist->filters[j]->graph->graph_desc) {
2584                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
2585                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
2586                        ist->filters[j]->name);
2587                 if (nb_filtergraphs > 1)
2588                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
2589                 av_log(NULL, AV_LOG_INFO, "\n");
2590             }
2591         }
2592     }
2593
2594     for (i = 0; i < nb_output_streams; i++) {
2595         ost = output_streams[i];
2596
2597         if (ost->attachment_filename) {
2598             /* an attached file */
2599             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2600                    ost->attachment_filename, ost->file_index, ost->index);
2601             continue;
2602         }
2603
2604         if (ost->filter && ost->filter->graph->graph_desc) {
2605             /* output from a complex graph */
2606             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
2607             if (nb_filtergraphs > 1)
2608                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
2609
2610             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
2611                    ost->index, ost->enc ? ost->enc->name : "?");
2612             continue;
2613         }
2614
2615         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2616                input_streams[ost->source_index]->file_index,
2617                input_streams[ost->source_index]->st->index,
2618                ost->file_index,
2619                ost->index);
2620         if (ost->sync_ist != input_streams[ost->source_index])
2621             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2622                    ost->sync_ist->file_index,
2623                    ost->sync_ist->st->index);
2624         if (ost->stream_copy)
2625             av_log(NULL, AV_LOG_INFO, " (copy)");
2626         else
2627             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
2628                    input_streams[ost->source_index]->dec->name : "?",
2629                    ost->enc ? ost->enc->name : "?");
2630         av_log(NULL, AV_LOG_INFO, "\n");
2631     }
2632
2633     if (ret) {
2634         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2635         return ret;
2636     }
2637
2638     if (want_sdp) {
2639         print_sdp();
2640     }
2641
2642     return 0;
2643 }
2644
2645 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
2646 static int need_output(void)
2647 {
2648     int i;
2649
2650     for (i = 0; i < nb_output_streams; i++) {
2651         OutputStream *ost    = output_streams[i];
2652         OutputFile *of       = output_files[ost->file_index];
2653         AVFormatContext *os  = output_files[ost->file_index]->ctx;
2654
2655         if (ost->finished ||
2656             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2657             continue;
2658         if (ost->frame_number >= ost->max_frames) {
2659             int j;
2660             for (j = 0; j < of->ctx->nb_streams; j++)
2661                 close_output_stream(output_streams[of->ost_index + j]);
2662             continue;
2663         }
2664
2665         return 1;
2666     }
2667
2668     return 0;
2669 }
2670
2671 /**
2672  * Select the output stream to process.
2673  *
2674  * @return  selected output stream, or NULL if none available
2675  */
2676 static OutputStream *choose_output(void)
2677 {
2678     int i;
2679     int64_t opts_min = INT64_MAX;
2680     OutputStream *ost_min = NULL;
2681
2682     for (i = 0; i < nb_output_streams; i++) {
2683         OutputStream *ost = output_streams[i];
2684         int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
2685                                     AV_TIME_BASE_Q);
2686         if (!ost->unavailable && !ost->finished && opts < opts_min) {
2687             opts_min = opts;
2688             ost_min  = ost;
2689         }
2690     }
2691     return ost_min;
2692 }
2693
2694 static int check_keyboard_interaction(int64_t cur_time)
2695 {
2696     int i, ret, key;
2697     static int64_t last_time;
2698     if (received_nb_signals)
2699         return AVERROR_EXIT;
2700     /* read_key() returns 0 on EOF */
2701     if(cur_time - last_time >= 100000 && !run_as_daemon){
2702         key =  read_key();
2703         last_time = cur_time;
2704     }else
2705         key = -1;
2706     if (key == 'q')
2707         return AVERROR_EXIT;
2708     if (key == '+') av_log_set_level(av_log_get_level()+10);
2709     if (key == '-') av_log_set_level(av_log_get_level()-10);
2710     if (key == 's') qp_hist     ^= 1;
2711     if (key == 'h'){
2712         if (do_hex_dump){
2713             do_hex_dump = do_pkt_dump = 0;
2714         } else if(do_pkt_dump){
2715             do_hex_dump = 1;
2716         } else
2717             do_pkt_dump = 1;
2718         av_log_set_level(AV_LOG_DEBUG);
2719     }
2720     if (key == 'c' || key == 'C'){
2721         char buf[4096], target[64], command[256], arg[256] = {0};
2722         double time;
2723         int k, n = 0;
2724         fprintf(stderr, "\nEnter command: <target>|all <time>|-1 <command>[ <argument>]\n");
2725         i = 0;
2726         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
2727             if (k > 0)
2728                 buf[i++] = k;
2729         buf[i] = 0;
2730         if (k > 0 &&
2731             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
2732             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
2733                    target, time, command, arg);
2734             for (i = 0; i < nb_filtergraphs; i++) {
2735                 FilterGraph *fg = filtergraphs[i];
2736                 if (fg->graph) {
2737                     if (time < 0) {
2738                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
2739                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
2740                         fprintf(stderr, "Command reply for stream %d: ret:%d res:\n%s", i, ret, buf);
2741                     } else if (key == 'c') {
2742                         fprintf(stderr, "Queing commands only on filters supporting the specific command is unsupported\n");
2743                         ret = AVERROR_PATCHWELCOME;
2744                     } else {
2745                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
2746                     }
2747                 }
2748             }
2749         } else {
2750             av_log(NULL, AV_LOG_ERROR,
2751                    "Parse error, at least 3 arguments were expected, "
2752                    "only %d given in string '%s'\n", n, buf);
2753         }
2754     }
2755     if (key == 'd' || key == 'D'){
2756         int debug=0;
2757         if(key == 'D') {
2758             debug = input_streams[0]->st->codec->debug<<1;
2759             if(!debug) debug = 1;
2760             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
2761                 debug += debug;
2762         }else
2763             if(scanf("%d", &debug)!=1)
2764                 fprintf(stderr,"error parsing debug value\n");
2765         for(i=0;i<nb_input_streams;i++) {
2766             input_streams[i]->st->codec->debug = debug;
2767         }
2768         for(i=0;i<nb_output_streams;i++) {
2769             OutputStream *ost = output_streams[i];
2770             ost->st->codec->debug = debug;
2771         }
2772         if(debug) av_log_set_level(AV_LOG_DEBUG);
2773         fprintf(stderr,"debug=%d\n", debug);
2774     }
2775     if (key == '?'){
2776         fprintf(stderr, "key    function\n"
2777                         "?      show this help\n"
2778                         "+      increase verbosity\n"
2779                         "-      decrease verbosity\n"
2780                         "c      Send command to first matching filter supporting it\n"
2781                         "C      Send/Que command to all matching filters\n"
2782                         "D      cycle through available debug modes\n"
2783                         "h      dump packets/hex press to cycle through the 3 states\n"
2784                         "q      quit\n"
2785                         "s      Show QP histogram\n"
2786         );
2787     }
2788     return 0;
2789 }
2790
2791 #if HAVE_PTHREADS
2792 static void *input_thread(void *arg)
2793 {
2794     InputFile *f = arg;
2795     int ret = 0;
2796
2797     while (!transcoding_finished && ret >= 0) {
2798         AVPacket pkt;
2799         ret = av_read_frame(f->ctx, &pkt);
2800
2801         if (ret == AVERROR(EAGAIN)) {
2802             av_usleep(10000);
2803             ret = 0;
2804             continue;
2805         } else if (ret < 0)
2806             break;
2807
2808         pthread_mutex_lock(&f->fifo_lock);
2809         while (!av_fifo_space(f->fifo))
2810             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2811
2812         av_dup_packet(&pkt);
2813         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2814
2815         pthread_mutex_unlock(&f->fifo_lock);
2816     }
2817
2818     f->finished = 1;
2819     return NULL;
2820 }
2821
2822 static void free_input_threads(void)
2823 {
2824     int i;
2825
2826     if (nb_input_files == 1)
2827         return;
2828
2829     transcoding_finished = 1;
2830
2831     for (i = 0; i < nb_input_files; i++) {
2832         InputFile *f = input_files[i];
2833         AVPacket pkt;
2834
2835         if (!f->fifo || f->joined)
2836             continue;
2837
2838         pthread_mutex_lock(&f->fifo_lock);
2839         while (av_fifo_size(f->fifo)) {
2840             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2841             av_free_packet(&pkt);
2842         }
2843         pthread_cond_signal(&f->fifo_cond);
2844         pthread_mutex_unlock(&f->fifo_lock);
2845
2846         pthread_join(f->thread, NULL);
2847         f->joined = 1;
2848
2849         while (av_fifo_size(f->fifo)) {
2850             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2851             av_free_packet(&pkt);
2852         }
2853         av_fifo_free(f->fifo);
2854     }
2855 }
2856
2857 static int init_input_threads(void)
2858 {
2859     int i, ret;
2860
2861     if (nb_input_files == 1)
2862         return 0;
2863
2864     for (i = 0; i < nb_input_files; i++) {
2865         InputFile *f = input_files[i];
2866
2867         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2868             return AVERROR(ENOMEM);
2869
2870         pthread_mutex_init(&f->fifo_lock, NULL);
2871         pthread_cond_init (&f->fifo_cond, NULL);
2872
2873         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2874             return AVERROR(ret);
2875     }
2876     return 0;
2877 }
2878
2879 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2880 {
2881     int ret = 0;
2882
2883     pthread_mutex_lock(&f->fifo_lock);
2884
2885     if (av_fifo_size(f->fifo)) {
2886         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2887         pthread_cond_signal(&f->fifo_cond);
2888     } else {
2889         if (f->finished)
2890             ret = AVERROR_EOF;
2891         else
2892             ret = AVERROR(EAGAIN);
2893     }
2894
2895     pthread_mutex_unlock(&f->fifo_lock);
2896
2897     return ret;
2898 }
2899 #endif
2900
2901 static int get_input_packet(InputFile *f, AVPacket *pkt)
2902 {
2903     if (f->rate_emu) {
2904         int i;
2905         for (i = 0; i < f->nb_streams; i++) {
2906             InputStream *ist = input_streams[f->ist_index + i];
2907             int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
2908             int64_t now = av_gettime() - ist->start;
2909             if (pts > now)
2910                 return AVERROR(EAGAIN);
2911         }
2912     }
2913
2914 #if HAVE_PTHREADS
2915     if (nb_input_files > 1)
2916         return get_input_packet_mt(f, pkt);
2917 #endif
2918     return av_read_frame(f->ctx, pkt);
2919 }
2920
2921 static int got_eagain(void)
2922 {
2923     int i;
2924     for (i = 0; i < nb_output_streams; i++)
2925         if (output_streams[i]->unavailable)
2926             return 1;
2927     return 0;
2928 }
2929
2930 static void reset_eagain(void)
2931 {
2932     int i;
2933     for (i = 0; i < nb_input_files; i++)
2934         input_files[i]->eagain = 0;
2935     for (i = 0; i < nb_output_streams; i++)
2936         output_streams[i]->unavailable = 0;
2937 }
2938
2939 /*
2940  * Return
2941  * - 0 -- one packet was read and processed
2942  * - AVERROR(EAGAIN) -- no packets were available for selected file,
2943  *   this function should be called again
2944  * - AVERROR_EOF -- this function should not be called again
2945  */
2946 static int process_input(int file_index)
2947 {
2948     InputFile *ifile = input_files[file_index];
2949     AVFormatContext *is;
2950     InputStream *ist;
2951     AVPacket pkt;
2952     int ret, i, j;
2953
2954     is  = ifile->ctx;
2955     ret = get_input_packet(ifile, &pkt);
2956
2957     if (ret == AVERROR(EAGAIN)) {
2958         ifile->eagain = 1;
2959         return ret;
2960     }
2961     if (ret < 0) {
2962         if (ret != AVERROR_EOF) {
2963             print_error(is->filename, ret);
2964             if (exit_on_error)
2965                 exit_program(1);
2966         }
2967         ifile->eof_reached = 1;
2968
2969         for (i = 0; i < ifile->nb_streams; i++) {
2970             ist = input_streams[ifile->ist_index + i];
2971             if (ist->decoding_needed)
2972                 output_packet(ist, NULL);
2973
2974             /* mark all outputs that don't go through lavfi as finished */
2975             for (j = 0; j < nb_output_streams; j++) {
2976                 OutputStream *ost = output_streams[j];
2977
2978                 if (ost->source_index == ifile->ist_index + i &&
2979                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
2980                     close_output_stream(ost);
2981             }
2982         }
2983
2984         return AVERROR(EAGAIN);
2985     }
2986
2987     reset_eagain();
2988
2989     if (do_pkt_dump) {
2990         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2991                          is->streams[pkt.stream_index]);
2992     }
2993     /* the following test is needed in case new streams appear
2994        dynamically in stream : we ignore them */
2995     if (pkt.stream_index >= ifile->nb_streams) {
2996         report_new_stream(file_index, &pkt);
2997         goto discard_packet;
2998     }
2999
3000     ist = input_streams[ifile->ist_index + pkt.stream_index];
3001     if (ist->discard)
3002         goto discard_packet;
3003
3004     if (debug_ts) {
3005         av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
3006                "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",
3007                ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->st->codec->codec_type),
3008                av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &AV_TIME_BASE_Q),
3009                av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &AV_TIME_BASE_Q),
3010                av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3011                av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3012                av_ts2str(input_files[ist->file_index]->ts_offset),
3013                av_ts2timestr(input_files[ist->file_index]->ts_offset, &AV_TIME_BASE_Q));
3014     }
3015
3016     if(!ist->wrap_correction_done && is->start_time != AV_NOPTS_VALUE && ist->st->pts_wrap_bits < 64){
3017         int64_t stime, stime2;
3018         // Correcting starttime based on the enabled streams
3019         // FIXME this ideally should be done before the first use of starttime but we do not know which are the enabled streams at that point.
3020         //       so we instead do it here as part of discontinuity handling
3021         if (   ist->next_dts == AV_NOPTS_VALUE
3022             && ifile->ts_offset == -is->start_time
3023             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
3024             int64_t new_start_time = INT64_MAX;
3025             for (i=0; i<is->nb_streams; i++) {
3026                 AVStream *st = is->streams[i];
3027                 if(st->discard == AVDISCARD_ALL || st->start_time == AV_NOPTS_VALUE)
3028                     continue;
3029                 new_start_time = FFMIN(new_start_time, av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q));
3030             }
3031             if (new_start_time > is->start_time) {
3032                 av_log(is, AV_LOG_VERBOSE, "Correcting start time by %"PRId64"\n", new_start_time - is->start_time);
3033                 ifile->ts_offset = -new_start_time;
3034             }
3035         }
3036
3037         stime = av_rescale_q(is->start_time, AV_TIME_BASE_Q, ist->st->time_base);
3038         stime2= stime + (1ULL<<ist->st->pts_wrap_bits);
3039         ist->wrap_correction_done = 1;
3040
3041         if(stime2 > stime && pkt.dts != AV_NOPTS_VALUE && pkt.dts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
3042             pkt.dts -= 1ULL<<ist->st->pts_wrap_bits;
3043             ist->wrap_correction_done = 0;
3044         }
3045         if(stime2 > stime && pkt.pts != AV_NOPTS_VALUE && pkt.pts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
3046             pkt.pts -= 1ULL<<ist->st->pts_wrap_bits;
3047             ist->wrap_correction_done = 0;
3048         }
3049     }
3050
3051     if (pkt.dts != AV_NOPTS_VALUE)
3052         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3053     if (pkt.pts != AV_NOPTS_VALUE)
3054         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3055
3056     if (pkt.pts != AV_NOPTS_VALUE)
3057         pkt.pts *= ist->ts_scale;
3058     if (pkt.dts != AV_NOPTS_VALUE)
3059         pkt.dts *= ist->ts_scale;
3060
3061     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts == AV_NOPTS_VALUE && !copy_ts
3062         && (is->iformat->flags & AVFMT_TS_DISCONT) && ifile->last_ts != AV_NOPTS_VALUE) {
3063         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3064         int64_t delta   = pkt_dts - ifile->last_ts;
3065         if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3066             (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3067                 ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)){
3068             ifile->ts_offset -= delta;
3069             av_log(NULL, AV_LOG_DEBUG,
3070                    "Inter stream timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3071                    delta, ifile->ts_offset);
3072             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3073             if (pkt.pts != AV_NOPTS_VALUE)
3074                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3075         }
3076     }
3077
3078     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
3079         !copy_ts) {
3080         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3081         int64_t delta   = pkt_dts - ist->next_dts;
3082         if (is->iformat->flags & AVFMT_TS_DISCONT) {
3083         if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3084             (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3085                 ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3086             pkt_dts + AV_TIME_BASE/10 < ist->pts){
3087             ifile->ts_offset -= delta;
3088             av_log(NULL, AV_LOG_DEBUG,
3089                    "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3090                    delta, ifile->ts_offset);
3091             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3092             if (pkt.pts != AV_NOPTS_VALUE)
3093                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3094         }
3095         } else {
3096             if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3097                 (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
3098                ) {
3099                 av_log(NULL, AV_LOG_WARNING, "DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n", pkt.dts, ist->next_dts, pkt.stream_index);
3100                 pkt.dts = AV_NOPTS_VALUE;
3101             }
3102             if (pkt.pts != AV_NOPTS_VALUE){
3103                 int64_t pkt_pts = av_rescale_q(pkt.pts, ist->st->time_base, AV_TIME_BASE_Q);
3104                 delta   = pkt_pts - ist->next_dts;
3105                 if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3106                     (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
3107                    ) {
3108                     av_log(NULL, AV_LOG_WARNING, "PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n", pkt.pts, ist->next_dts, pkt.stream_index);
3109                     pkt.pts = AV_NOPTS_VALUE;
3110                 }
3111             }
3112         }
3113     }
3114
3115     if (pkt.dts != AV_NOPTS_VALUE)
3116         ifile->last_ts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3117
3118     if (debug_ts) {
3119         av_log(NULL, AV_LOG_INFO, "demuxer+ffmpeg -> ist_index:%d type:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%s off_time:%s\n",
3120                ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->st->codec->codec_type),
3121                av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3122                av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3123                av_ts2str(input_files[ist->file_index]->ts_offset),
3124                av_ts2timestr(input_files[ist->file_index]->ts_offset, &AV_TIME_BASE_Q));
3125     }
3126
3127     sub2video_heartbeat(ist, pkt.pts);
3128
3129     ret = output_packet(ist, &pkt);
3130     if (ret < 0) {
3131         char buf[128];
3132         av_strerror(ret, buf, sizeof(buf));
3133         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d: %s\n",
3134                 ist->file_index, ist->st->index, buf);
3135         if (exit_on_error)
3136             exit_program(1);
3137     }
3138
3139 discard_packet:
3140     av_free_packet(&pkt);
3141
3142     return 0;
3143 }
3144
3145 /**
3146  * Perform a step of transcoding for the specified filter graph.
3147  *
3148  * @param[in]  graph     filter graph to consider
3149  * @param[out] best_ist  input stream where a frame would allow to continue
3150  * @return  0 for success, <0 for error
3151  */
3152 static int transcode_from_filter(FilterGraph *graph, InputStream **best_ist)
3153 {
3154     int i, ret;
3155     int nb_requests, nb_requests_max = 0;
3156     InputFilter *ifilter;
3157     InputStream *ist;
3158
3159     *best_ist = NULL;
3160     ret = avfilter_graph_request_oldest(graph->graph);
3161     if (ret >= 0)
3162         return reap_filters();
3163
3164     if (ret == AVERROR_EOF) {
3165         ret = reap_filters();
3166         for (i = 0; i < graph->nb_outputs; i++)
3167             close_output_stream(graph->outputs[i]->ost);
3168         return ret;
3169     }
3170     if (ret != AVERROR(EAGAIN))
3171         return ret;
3172
3173     for (i = 0; i < graph->nb_inputs; i++) {
3174         ifilter = graph->inputs[i];
3175         ist = ifilter->ist;
3176         if (input_files[ist->file_index]->eagain ||
3177             input_files[ist->file_index]->eof_reached)
3178             continue;
3179         nb_requests = av_buffersrc_get_nb_failed_requests(ifilter->filter);
3180         if (nb_requests > nb_requests_max) {
3181             nb_requests_max = nb_requests;
3182             *best_ist = ist;
3183         }
3184     }
3185
3186     if (!*best_ist)
3187         for (i = 0; i < graph->nb_outputs; i++)
3188             graph->outputs[i]->ost->unavailable = 1;
3189
3190     return 0;
3191 }
3192
3193 /**
3194  * Run a single step of transcoding.
3195  *
3196  * @return  0 for success, <0 for error
3197  */
3198 static int transcode_step(void)
3199 {
3200     OutputStream *ost;
3201     InputStream  *ist;
3202     int ret;
3203
3204     ost = choose_output();
3205     if (!ost) {
3206         if (got_eagain()) {
3207             reset_eagain();
3208             av_usleep(10000);
3209             return 0;
3210         }
3211         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
3212         return AVERROR_EOF;
3213     }
3214
3215     if (ost->filter) {
3216         if ((ret = transcode_from_filter(ost->filter->graph, &ist)) < 0)
3217             return ret;
3218         if (!ist)
3219             return 0;
3220     } else {
3221         av_assert0(ost->source_index >= 0);
3222         ist = input_streams[ost->source_index];
3223     }
3224
3225     ret = process_input(ist->file_index);
3226     if (ret == AVERROR(EAGAIN)) {
3227         if (input_files[ist->file_index]->eagain)
3228             ost->unavailable = 1;
3229         return 0;
3230     }
3231     if (ret < 0)
3232         return ret == AVERROR_EOF ? 0 : ret;
3233
3234     return reap_filters();
3235 }
3236
3237 /*
3238  * The following code is the main loop of the file converter
3239  */
3240 static int transcode(void)
3241 {
3242     int ret, i;
3243     AVFormatContext *os;
3244     OutputStream *ost;
3245     InputStream *ist;
3246     int64_t timer_start;
3247
3248     ret = transcode_init();
3249     if (ret < 0)
3250         goto fail;
3251
3252     if (stdin_interaction) {
3253         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
3254     }
3255
3256     timer_start = av_gettime();
3257
3258 #if HAVE_PTHREADS
3259     if ((ret = init_input_threads()) < 0)
3260         goto fail;
3261 #endif
3262
3263     while (!received_sigterm) {
3264         int64_t cur_time= av_gettime();
3265
3266         /* if 'q' pressed, exits */
3267         if (stdin_interaction)
3268             if (check_keyboard_interaction(cur_time) < 0)
3269                 break;
3270
3271         /* check if there's any stream where output is still needed */
3272         if (!need_output()) {
3273             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
3274             break;
3275         }
3276
3277         ret = transcode_step();
3278         if (ret < 0) {
3279             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
3280                 continue;
3281
3282             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
3283             break;
3284         }
3285
3286         /* dump report by using the output first video and audio streams */
3287         print_report(0, timer_start, cur_time);
3288     }
3289 #if HAVE_PTHREADS
3290     free_input_threads();
3291 #endif
3292
3293     /* at the end of stream, we must flush the decoder buffers */
3294     for (i = 0; i < nb_input_streams; i++) {
3295         ist = input_streams[i];
3296         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3297             output_packet(ist, NULL);
3298         }
3299     }
3300     flush_encoders();
3301
3302     term_exit();
3303
3304     /* write the trailer if needed and close file */
3305     for (i = 0; i < nb_output_files; i++) {
3306         os = output_files[i]->ctx;
3307         av_write_trailer(os);
3308     }
3309
3310     /* dump report by using the first video and audio streams */
3311     print_report(1, timer_start, av_gettime());
3312
3313     /* close each encoder */
3314     for (i = 0; i < nb_output_streams; i++) {
3315         ost = output_streams[i];
3316         if (ost->encoding_needed) {
3317             av_freep(&ost->st->codec->stats_in);
3318             avcodec_close(ost->st->codec);
3319         }
3320     }
3321
3322     /* close each decoder */
3323     for (i = 0; i < nb_input_streams; i++) {
3324         ist = input_streams[i];
3325         if (ist->decoding_needed) {
3326             avcodec_close(ist->st->codec);
3327         }
3328     }
3329
3330     /* finished ! */
3331     ret = 0;
3332
3333  fail:
3334 #if HAVE_PTHREADS
3335     free_input_threads();
3336 #endif
3337
3338     if (output_streams) {
3339         for (i = 0; i < nb_output_streams; i++) {
3340             ost = output_streams[i];
3341             if (ost) {
3342                 if (ost->stream_copy)
3343                     av_freep(&ost->st->codec->extradata);
3344                 if (ost->logfile) {
3345                     fclose(ost->logfile);
3346                     ost->logfile = NULL;
3347                 }
3348                 av_freep(&ost->st->codec->subtitle_header);
3349                 av_freep(&ost->forced_kf_pts);
3350                 av_freep(&ost->apad);
3351                 av_dict_free(&ost->opts);
3352                 av_dict_free(&ost->swr_opts);
3353                 av_dict_free(&ost->resample_opts);
3354             }
3355         }
3356     }
3357     return ret;
3358 }
3359
3360
3361 static int64_t getutime(void)
3362 {
3363 #if HAVE_GETRUSAGE
3364     struct rusage rusage;
3365
3366     getrusage(RUSAGE_SELF, &rusage);
3367     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
3368 #elif HAVE_GETPROCESSTIMES
3369     HANDLE proc;
3370     FILETIME c, e, k, u;
3371     proc = GetCurrentProcess();
3372     GetProcessTimes(proc, &c, &e, &k, &u);
3373     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
3374 #else
3375     return av_gettime();
3376 #endif
3377 }
3378
3379 static int64_t getmaxrss(void)
3380 {
3381 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
3382     struct rusage rusage;
3383     getrusage(RUSAGE_SELF, &rusage);
3384     return (int64_t)rusage.ru_maxrss * 1024;
3385 #elif HAVE_GETPROCESSMEMORYINFO
3386     HANDLE proc;
3387     PROCESS_MEMORY_COUNTERS memcounters;
3388     proc = GetCurrentProcess();
3389     memcounters.cb = sizeof(memcounters);
3390     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
3391     return memcounters.PeakPagefileUsage;
3392 #else
3393     return 0;
3394 #endif
3395 }
3396
3397 static void log_callback_null(void *ptr, int level, const char *fmt, va_list vl)
3398 {
3399 }
3400
3401 int main(int argc, char **argv)
3402 {
3403     int ret;
3404     int64_t ti;
3405
3406     register_exit(ffmpeg_cleanup);
3407
3408     setvbuf(stderr,NULL,_IONBF,0); /* win32 runtime needs this */
3409
3410     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3411     parse_loglevel(argc, argv, options);
3412
3413     if(argc>1 && !strcmp(argv[1], "-d")){
3414         run_as_daemon=1;
3415         av_log_set_callback(log_callback_null);
3416         argc--;
3417         argv++;
3418     }
3419
3420     avcodec_register_all();
3421 #if CONFIG_AVDEVICE
3422     avdevice_register_all();
3423 #endif
3424     avfilter_register_all();
3425     av_register_all();
3426     avformat_network_init();
3427
3428     show_banner(argc, argv, options);
3429
3430     term_init();
3431
3432     /* parse options and open all input/output files */
3433     ret = ffmpeg_parse_options(argc, argv);
3434     if (ret < 0)
3435         exit_program(1);
3436
3437     if (nb_output_files <= 0 && nb_input_files == 0) {
3438         show_usage();
3439         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3440         exit_program(1);
3441     }
3442
3443     /* file converter / grab */
3444     if (nb_output_files <= 0) {
3445         av_log(NULL, AV_LOG_FATAL, "At least one output file must be specified\n");
3446         exit_program(1);
3447     }
3448
3449 //     if (nb_input_files == 0) {
3450 //         av_log(NULL, AV_LOG_FATAL, "At least one input file must be specified\n");
3451 //         exit_program(1);
3452 //     }
3453
3454     current_time = ti = getutime();
3455     if (transcode() < 0)
3456         exit_program(1);
3457     ti = getutime() - ti;
3458     if (do_benchmark) {
3459         printf("bench: utime=%0.3fs\n", ti / 1000000.0);
3460     }
3461     av_log(NULL, AV_LOG_DEBUG, "%"PRIu64" frames successfully decoded, %"PRIu64" decoding errors\n",
3462            decode_error_stat[0], decode_error_stat[1]);
3463     if ((decode_error_stat[0] + decode_error_stat[1]) * max_error_rate < decode_error_stat[1])
3464         exit_program(69);
3465
3466     exit_program(received_nb_signals ? 255 : 0);
3467     return 0;
3468 }