lavf/avformat_seek_file: fix harmless integer overflow
[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 #include <unistd.h>
35 #endif
36 #include "libavformat/avformat.h"
37 #include "libavdevice/avdevice.h"
38 #include "libswscale/swscale.h"
39 #include "libswresample/swresample.h"
40 #include "libavutil/opt.h"
41 #include "libavutil/audioconvert.h"
42 #include "libavutil/parseutils.h"
43 #include "libavutil/samplefmt.h"
44 #include "libavutil/colorspace.h"
45 #include "libavutil/fifo.h"
46 #include "libavutil/intreadwrite.h"
47 #include "libavutil/dict.h"
48 #include "libavutil/mathematics.h"
49 #include "libavutil/pixdesc.h"
50 #include "libavutil/avstring.h"
51 #include "libavutil/libm.h"
52 #include "libavutil/imgutils.h"
53 #include "libavutil/timestamp.h"
54 #include "libavutil/bprint.h"
55 #include "libavutil/time.h"
56 #include "libavformat/os_support.h"
57
58 #include "libavformat/ffm.h" // not public API
59
60 # include "libavfilter/avcodec.h"
61 # include "libavfilter/avfilter.h"
62 # include "libavfilter/avfiltergraph.h"
63 # include "libavfilter/buffersrc.h"
64 # include "libavfilter/buffersink.h"
65
66 #if HAVE_SYS_RESOURCE_H
67 #include <sys/types.h>
68 #include <sys/resource.h>
69 #elif HAVE_GETPROCESSTIMES
70 #include <windows.h>
71 #endif
72 #if HAVE_GETPROCESSMEMORYINFO
73 #include <windows.h>
74 #include <psapi.h>
75 #endif
76
77 #if HAVE_SYS_SELECT_H
78 #include <sys/select.h>
79 #endif
80
81 #if HAVE_TERMIOS_H
82 #include <fcntl.h>
83 #include <sys/ioctl.h>
84 #include <sys/time.h>
85 #include <termios.h>
86 #elif HAVE_KBHIT
87 #include <conio.h>
88 #endif
89
90 #if HAVE_PTHREADS
91 #include <pthread.h>
92 #endif
93
94 #include <time.h>
95
96 #include "ffmpeg.h"
97 #include "cmdutils.h"
98
99 #include "libavutil/avassert.h"
100
101 const char program_name[] = "ffmpeg";
102 const int program_birth_year = 2000;
103
104 static FILE *vstats_file;
105
106 static void do_video_stats(AVFormatContext *os, OutputStream *ost, int frame_size);
107 static int64_t getutime(void);
108
109 static int run_as_daemon  = 0;
110 static int64_t video_size = 0;
111 static int64_t audio_size = 0;
112 static int64_t subtitle_size = 0;
113 static int64_t extra_size = 0;
114 static int nb_frames_dup = 0;
115 static int nb_frames_drop = 0;
116
117 static int current_time;
118 AVIOContext *progress_avio = NULL;
119
120 static uint8_t *subtitle_out;
121
122 #if HAVE_PTHREADS
123 /* signal to input threads that they should exit; set by the main thread */
124 static int transcoding_finished;
125 #endif
126
127 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
128
129 InputStream **input_streams = NULL;
130 int        nb_input_streams = 0;
131 InputFile   **input_files   = NULL;
132 int        nb_input_files   = 0;
133
134 OutputStream **output_streams = NULL;
135 int         nb_output_streams = 0;
136 OutputFile   **output_files   = NULL;
137 int         nb_output_files   = 0;
138
139 FilterGraph **filtergraphs;
140 int        nb_filtergraphs;
141
142 #if HAVE_TERMIOS_H
143
144 /* init terminal so that we can grab keys */
145 static struct termios oldtty;
146 static int restore_tty;
147 #endif
148
149
150 /* sub2video hack:
151    Convert subtitles to video with alpha to insert them in filter graphs.
152    This is a temporary solution until libavfilter gets real subtitles support.
153  */
154
155
156
157 static void sub2video_copy_rect(uint8_t *dst, int dst_linesize, int w, int h,
158                                 AVSubtitleRect *r)
159 {
160     uint32_t *pal, *dst2;
161     uint8_t *src, *src2;
162     int x, y;
163
164     if (r->type != SUBTITLE_BITMAP) {
165         av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n");
166         return;
167     }
168     if (r->x < 0 || r->x + r->w > w || r->y < 0 || r->y + r->h > h) {
169         av_log(NULL, AV_LOG_WARNING, "sub2video: rectangle overflowing\n");
170         return;
171     }
172
173     dst += r->y * dst_linesize + r->x * 4;
174     src = r->pict.data[0];
175     pal = (uint32_t *)r->pict.data[1];
176     for (y = 0; y < r->h; y++) {
177         dst2 = (uint32_t *)dst;
178         src2 = src;
179         for (x = 0; x < r->w; x++)
180             *(dst2++) = pal[*(src2++)];
181         dst += dst_linesize;
182         src += r->pict.linesize[0];
183     }
184 }
185
186 static void sub2video_push_ref(InputStream *ist, int64_t pts)
187 {
188     AVFilterBufferRef *ref = ist->sub2video.ref;
189     int i;
190
191     ist->sub2video.last_pts = ref->pts = pts;
192     for (i = 0; i < ist->nb_filters; i++)
193         av_buffersrc_add_ref(ist->filters[i]->filter,
194                              avfilter_ref_buffer(ref, ~0),
195                              AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT |
196                              AV_BUFFERSRC_FLAG_NO_COPY |
197                              AV_BUFFERSRC_FLAG_PUSH);
198 }
199
200 static void sub2video_update(InputStream *ist, AVSubtitle *sub, int64_t pts)
201 {
202     int w = ist->sub2video.w, h = ist->sub2video.h;
203     AVFilterBufferRef *ref = ist->sub2video.ref;
204     int8_t *dst;
205     int     dst_linesize;
206     int i;
207
208     if (!ref)
209         return;
210     dst          = ref->data    [0];
211     dst_linesize = ref->linesize[0];
212     memset(dst, 0, h * dst_linesize);
213     for (i = 0; i < sub->num_rects; i++)
214         sub2video_copy_rect(dst, dst_linesize, w, h, sub->rects[i]);
215     sub2video_push_ref(ist, pts);
216 }
217
218 static void sub2video_heartbeat(InputStream *ist, int64_t pts)
219 {
220     InputFile *infile = input_files[ist->file_index];
221     int i, j, nb_reqs;
222     int64_t pts2;
223
224     /* When a frame is read from a file, examine all sub2video streams in
225        the same file and send the sub2video frame again. Otherwise, decoded
226        video frames could be accumulating in the filter graph while a filter
227        (possibly overlay) is desperately waiting for a subtitle frame. */
228     for (i = 0; i < infile->nb_streams; i++) {
229         InputStream *ist2 = input_streams[infile->ist_index + i];
230         if (!ist2->sub2video.ref)
231             continue;
232         /* subtitles seem to be usually muxed ahead of other streams;
233            if not, substracting a larger time here is necessary */
234         pts2 = av_rescale_q(pts, ist->st->time_base, ist2->st->time_base) - 1;
235         /* do not send the heartbeat frame if the subtitle is already ahead */
236         if (pts2 <= ist2->sub2video.last_pts)
237             continue;
238         for (j = 0, nb_reqs = 0; j < ist2->nb_filters; j++)
239             nb_reqs += av_buffersrc_get_nb_failed_requests(ist2->filters[j]->filter);
240         if (nb_reqs)
241             sub2video_push_ref(ist2, pts2);
242     }
243 }
244
245 static void sub2video_flush(InputStream *ist)
246 {
247     int i;
248
249     for (i = 0; i < ist->nb_filters; i++)
250         av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
251 }
252
253 /* end of sub2video hack */
254
255 void term_exit(void)
256 {
257     av_log(NULL, AV_LOG_QUIET, "%s", "");
258 #if HAVE_TERMIOS_H
259     if(restore_tty)
260         tcsetattr (0, TCSANOW, &oldtty);
261 #endif
262 }
263
264 static volatile int received_sigterm = 0;
265 static volatile int received_nb_signals = 0;
266
267 static void
268 sigterm_handler(int sig)
269 {
270     received_sigterm = sig;
271     received_nb_signals++;
272     term_exit();
273     if(received_nb_signals > 3)
274         exit(123);
275 }
276
277 void term_init(void)
278 {
279 #if HAVE_TERMIOS_H
280     if(!run_as_daemon){
281         struct termios tty;
282         int istty = 1;
283 #if HAVE_ISATTY
284         istty = isatty(0) && isatty(2);
285 #endif
286         if (istty && tcgetattr (0, &tty) == 0) {
287             oldtty = tty;
288             restore_tty = 1;
289             atexit(term_exit);
290
291             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
292                              |INLCR|IGNCR|ICRNL|IXON);
293             tty.c_oflag |= OPOST;
294             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
295             tty.c_cflag &= ~(CSIZE|PARENB);
296             tty.c_cflag |= CS8;
297             tty.c_cc[VMIN] = 1;
298             tty.c_cc[VTIME] = 0;
299
300             tcsetattr (0, TCSANOW, &tty);
301         }
302         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
303     }
304 #endif
305     avformat_network_deinit();
306
307     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
308     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
309 #ifdef SIGXCPU
310     signal(SIGXCPU, sigterm_handler);
311 #endif
312 }
313
314 /* read a key without blocking */
315 static int read_key(void)
316 {
317     unsigned char ch;
318 #if HAVE_TERMIOS_H
319     int n = 1;
320     struct timeval tv;
321     fd_set rfds;
322
323     FD_ZERO(&rfds);
324     FD_SET(0, &rfds);
325     tv.tv_sec = 0;
326     tv.tv_usec = 0;
327     n = select(1, &rfds, NULL, NULL, &tv);
328     if (n > 0) {
329         n = read(0, &ch, 1);
330         if (n == 1)
331             return ch;
332
333         return n;
334     }
335 #elif HAVE_KBHIT
336 #    if HAVE_PEEKNAMEDPIPE
337     static int is_pipe;
338     static HANDLE input_handle;
339     DWORD dw, nchars;
340     if(!input_handle){
341         input_handle = GetStdHandle(STD_INPUT_HANDLE);
342         is_pipe = !GetConsoleMode(input_handle, &dw);
343     }
344
345     if (stdin->_cnt > 0) {
346         read(0, &ch, 1);
347         return ch;
348     }
349     if (is_pipe) {
350         /* When running under a GUI, you will end here. */
351         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL))
352             return -1;
353         //Read it
354         if(nchars != 0) {
355             read(0, &ch, 1);
356             return ch;
357         }else{
358             return -1;
359         }
360     }
361 #    endif
362     if(kbhit())
363         return(getch());
364 #endif
365     return -1;
366 }
367
368 static int decode_interrupt_cb(void *ctx)
369 {
370     return received_nb_signals > 1;
371 }
372
373 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
374
375 void av_noreturn exit_program(int ret)
376 {
377     int i, j;
378
379     for (i = 0; i < nb_filtergraphs; i++) {
380         avfilter_graph_free(&filtergraphs[i]->graph);
381         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
382             av_freep(&filtergraphs[i]->inputs[j]->name);
383             av_freep(&filtergraphs[i]->inputs[j]);
384         }
385         av_freep(&filtergraphs[i]->inputs);
386         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
387             av_freep(&filtergraphs[i]->outputs[j]->name);
388             av_freep(&filtergraphs[i]->outputs[j]);
389         }
390         av_freep(&filtergraphs[i]->outputs);
391         av_freep(&filtergraphs[i]);
392     }
393     av_freep(&filtergraphs);
394
395     av_freep(&subtitle_out);
396
397     /* close files */
398     for (i = 0; i < nb_output_files; i++) {
399         AVFormatContext *s = output_files[i]->ctx;
400         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
401             avio_close(s->pb);
402         avformat_free_context(s);
403         av_dict_free(&output_files[i]->opts);
404         av_freep(&output_files[i]);
405     }
406     for (i = 0; i < nb_output_streams; i++) {
407         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
408         while (bsfc) {
409             AVBitStreamFilterContext *next = bsfc->next;
410             av_bitstream_filter_close(bsfc);
411             bsfc = next;
412         }
413         output_streams[i]->bitstream_filters = NULL;
414
415         av_freep(&output_streams[i]->forced_keyframes);
416         av_freep(&output_streams[i]->avfilter);
417         av_freep(&output_streams[i]->logfile_prefix);
418         av_freep(&output_streams[i]->filtered_frame);
419         av_freep(&output_streams[i]);
420     }
421     for (i = 0; i < nb_input_files; i++) {
422         avformat_close_input(&input_files[i]->ctx);
423         av_freep(&input_files[i]);
424     }
425     for (i = 0; i < nb_input_streams; i++) {
426         av_freep(&input_streams[i]->decoded_frame);
427         av_dict_free(&input_streams[i]->opts);
428         free_buffer_pool(&input_streams[i]->buffer_pool);
429         avfilter_unref_bufferp(&input_streams[i]->sub2video.ref);
430         av_freep(&input_streams[i]->filters);
431         av_freep(&input_streams[i]);
432     }
433
434     if (vstats_file)
435         fclose(vstats_file);
436     av_free(vstats_filename);
437
438     av_freep(&input_streams);
439     av_freep(&input_files);
440     av_freep(&output_streams);
441     av_freep(&output_files);
442
443     uninit_opts();
444
445     avfilter_uninit();
446     avformat_network_deinit();
447
448     if (received_sigterm) {
449         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
450                (int) received_sigterm);
451         exit (255);
452     }
453
454     exit(ret);
455 }
456
457 void assert_avoptions(AVDictionary *m)
458 {
459     AVDictionaryEntry *t;
460     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
461         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
462         exit_program(1);
463     }
464 }
465
466 static void assert_codec_experimental(AVCodecContext *c, int encoder)
467 {
468     const char *codec_string = encoder ? "encoder" : "decoder";
469     AVCodec *codec;
470     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
471         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
472         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
473                 "results.\nAdd '-strict experimental' if you want to use it.\n",
474                 codec_string, c->codec->name);
475         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
476         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
477             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
478                    codec_string, codec->name);
479         exit_program(1);
480     }
481 }
482
483 static void update_benchmark(const char *fmt, ...)
484 {
485     if (do_benchmark_all) {
486         int64_t t = getutime();
487         va_list va;
488         char buf[1024];
489
490         if (fmt) {
491             va_start(va, fmt);
492             vsnprintf(buf, sizeof(buf), fmt, va);
493             va_end(va);
494             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
495         }
496         current_time = t;
497     }
498 }
499
500 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
501 {
502     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
503     AVCodecContext          *avctx = ost->st->codec;
504     int ret;
505
506     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
507         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
508         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
509
510     if ((avctx->codec_type == AVMEDIA_TYPE_AUDIO || avctx->codec_type == AVMEDIA_TYPE_VIDEO) && pkt->dts != AV_NOPTS_VALUE) {
511         int64_t max = ost->st->cur_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
512         if (ost->st->cur_dts && ost->st->cur_dts != AV_NOPTS_VALUE &&  max > pkt->dts) {
513             av_log(s, max - pkt->dts > 2 || avctx->codec_type == AVMEDIA_TYPE_VIDEO ? AV_LOG_WARNING : AV_LOG_DEBUG,
514                    "st:%d PTS: %"PRId64" DTS: %"PRId64" < %"PRId64" invalid, clipping\n", pkt->stream_index, pkt->pts, pkt->dts, max);
515             if(pkt->pts >= pkt->dts)
516                 pkt->pts = FFMAX(pkt->pts, max);
517             pkt->dts = max;
518         }
519     }
520
521     /*
522      * Audio encoders may split the packets --  #frames in != #packets out.
523      * But there is no reordering, so we can limit the number of output packets
524      * by simply dropping them here.
525      * Counting encoded video frames needs to be done separately because of
526      * reordering, see do_video_out()
527      */
528     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
529         if (ost->frame_number >= ost->max_frames) {
530             av_free_packet(pkt);
531             return;
532         }
533         ost->frame_number++;
534     }
535
536     while (bsfc) {
537         AVPacket new_pkt = *pkt;
538         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
539                                            &new_pkt.data, &new_pkt.size,
540                                            pkt->data, pkt->size,
541                                            pkt->flags & AV_PKT_FLAG_KEY);
542         if(a == 0 && new_pkt.data != pkt->data && new_pkt.destruct) {
543             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
544             if(t) {
545                 memcpy(t, new_pkt.data, new_pkt.size);
546                 memset(t + new_pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
547                 new_pkt.data = t;
548                 a = 1;
549             } else
550                 a = AVERROR(ENOMEM);
551         }
552         if (a > 0) {
553             av_free_packet(pkt);
554             new_pkt.destruct = av_destruct_packet;
555         } else if (a < 0) {
556             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
557                    bsfc->filter->name, pkt->stream_index,
558                    avctx->codec ? avctx->codec->name : "copy");
559             print_error("", a);
560             if (exit_on_error)
561                 exit_program(1);
562         }
563         *pkt = new_pkt;
564
565         bsfc = bsfc->next;
566     }
567
568     pkt->stream_index = ost->index;
569     ret = av_interleaved_write_frame(s, pkt);
570     if (ret < 0) {
571         print_error("av_interleaved_write_frame()", ret);
572         exit_program(1);
573     }
574 }
575
576 static void close_output_stream(OutputStream *ost)
577 {
578     OutputFile *of = output_files[ost->file_index];
579
580     ost->finished = 1;
581     if (of->shortest) {
582         int i;
583         for (i = 0; i < of->ctx->nb_streams; i++)
584             output_streams[of->ost_index + i]->finished = 1;
585     }
586 }
587
588 static int check_recording_time(OutputStream *ost)
589 {
590     OutputFile *of = output_files[ost->file_index];
591
592     if (of->recording_time != INT64_MAX &&
593         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
594                       AV_TIME_BASE_Q) >= 0) {
595         close_output_stream(ost);
596         return 0;
597     }
598     return 1;
599 }
600
601 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
602                          AVFrame *frame)
603 {
604     AVCodecContext *enc = ost->st->codec;
605     AVPacket pkt;
606     int got_packet = 0;
607
608     av_init_packet(&pkt);
609     pkt.data = NULL;
610     pkt.size = 0;
611
612     if (!check_recording_time(ost))
613         return;
614
615     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
616         frame->pts = ost->sync_opts;
617     ost->sync_opts = frame->pts + frame->nb_samples;
618
619     av_assert0(pkt.size || !pkt.data);
620     update_benchmark(NULL);
621     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
622         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
623         exit_program(1);
624     }
625     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
626
627     if (got_packet) {
628         if (pkt.pts != AV_NOPTS_VALUE)
629             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
630         if (pkt.dts != AV_NOPTS_VALUE)
631             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
632         if (pkt.duration > 0)
633             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
634
635         if (debug_ts) {
636             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
637                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
638                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
639                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
640         }
641
642         audio_size += pkt.size;
643         write_frame(s, &pkt, ost);
644
645         av_free_packet(&pkt);
646     }
647 }
648
649 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
650 {
651     AVCodecContext *dec;
652     AVPicture *picture2;
653     AVPicture picture_tmp;
654     uint8_t *buf = 0;
655
656     dec = ist->st->codec;
657
658     /* deinterlace : must be done before any resize */
659     if (do_deinterlace) {
660         int size;
661
662         /* create temporary picture */
663         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
664         buf  = av_malloc(size);
665         if (!buf)
666             return;
667
668         picture2 = &picture_tmp;
669         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
670
671         if (avpicture_deinterlace(picture2, picture,
672                                  dec->pix_fmt, dec->width, dec->height) < 0) {
673             /* if error, do not deinterlace */
674             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
675             av_free(buf);
676             buf = NULL;
677             picture2 = picture;
678         }
679     } else {
680         picture2 = picture;
681     }
682
683     if (picture != picture2)
684         *picture = *picture2;
685     *bufp = buf;
686 }
687
688 static void do_subtitle_out(AVFormatContext *s,
689                             OutputStream *ost,
690                             InputStream *ist,
691                             AVSubtitle *sub,
692                             int64_t pts)
693 {
694     int subtitle_out_max_size = 1024 * 1024;
695     int subtitle_out_size, nb, i;
696     AVCodecContext *enc;
697     AVPacket pkt;
698
699     if (pts == AV_NOPTS_VALUE) {
700         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
701         if (exit_on_error)
702             exit_program(1);
703         return;
704     }
705
706     enc = ost->st->codec;
707
708     if (!subtitle_out) {
709         subtitle_out = av_malloc(subtitle_out_max_size);
710     }
711
712     /* Note: DVB subtitle need one packet to draw them and one other
713        packet to clear them */
714     /* XXX: signal it in the codec context ? */
715     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
716         nb = 2;
717     else
718         nb = 1;
719
720     /* shift timestamp to honor -ss and make check_recording_time() work with -t */
721     pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q)
722         - output_files[ost->file_index]->start_time;
723     for (i = 0; i < nb; i++) {
724         ost->sync_opts = av_rescale_q(pts, AV_TIME_BASE_Q, enc->time_base);
725         if (!check_recording_time(ost))
726             return;
727
728         sub->pts = pts;
729         // start_display_time is required to be 0
730         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
731         sub->end_display_time  -= sub->start_display_time;
732         sub->start_display_time = 0;
733         if (i == 1)
734             sub->num_rects = 0;
735         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
736                                                     subtitle_out_max_size, sub);
737         if (subtitle_out_size < 0) {
738             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
739             exit_program(1);
740         }
741
742         av_init_packet(&pkt);
743         pkt.data = subtitle_out;
744         pkt.size = subtitle_out_size;
745         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
746         pkt.duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->st->time_base);
747         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
748             /* XXX: the pts correction is handled here. Maybe handling
749                it in the codec would be better */
750             if (i == 0)
751                 pkt.pts += 90 * sub->start_display_time;
752             else
753                 pkt.pts += 90 * sub->end_display_time;
754         }
755         subtitle_size += pkt.size;
756         write_frame(s, &pkt, ost);
757     }
758 }
759
760 static void do_video_out(AVFormatContext *s,
761                          OutputStream *ost,
762                          AVFrame *in_picture,
763                          float quality)
764 {
765     int ret, format_video_sync;
766     AVPacket pkt;
767     AVCodecContext *enc = ost->st->codec;
768     int nb_frames, i;
769     double sync_ipts, delta;
770     double duration = 0;
771     int frame_size = 0;
772     InputStream *ist = NULL;
773
774     if (ost->source_index >= 0)
775         ist = input_streams[ost->source_index];
776
777     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
778         duration = 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base));
779
780     sync_ipts = in_picture->pts;
781     delta = sync_ipts - ost->sync_opts + duration;
782
783     /* by default, we output a single frame */
784     nb_frames = 1;
785
786     format_video_sync = video_sync_method;
787     if (format_video_sync == VSYNC_AUTO)
788         format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : 1;
789
790     switch (format_video_sync) {
791     case VSYNC_CFR:
792         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
793         if (delta < -1.1)
794             nb_frames = 0;
795         else if (delta > 1.1)
796             nb_frames = lrintf(delta);
797         break;
798     case VSYNC_VFR:
799         if (delta <= -0.6)
800             nb_frames = 0;
801         else if (delta > 0.6)
802             ost->sync_opts = lrint(sync_ipts);
803         break;
804     case VSYNC_DROP:
805     case VSYNC_PASSTHROUGH:
806         ost->sync_opts = lrint(sync_ipts);
807         break;
808     default:
809         av_assert0(0);
810     }
811
812     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
813     if (nb_frames == 0) {
814         nb_frames_drop++;
815         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
816         return;
817     } else if (nb_frames > 1) {
818         if (nb_frames > dts_error_threshold * 30) {
819             av_log(NULL, AV_LOG_ERROR, "%d frame duplication too large, skiping\n", nb_frames - 1);
820             nb_frames_drop++;
821             return;
822         }
823         nb_frames_dup += nb_frames - 1;
824         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
825     }
826
827   /* duplicates frame if needed */
828   for (i = 0; i < nb_frames; i++) {
829     av_init_packet(&pkt);
830     pkt.data = NULL;
831     pkt.size = 0;
832
833     in_picture->pts = ost->sync_opts;
834
835     if (!check_recording_time(ost))
836         return;
837
838     if (s->oformat->flags & AVFMT_RAWPICTURE &&
839         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
840         /* raw pictures are written as AVPicture structure to
841            avoid any copies. We support temporarily the older
842            method. */
843         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
844         enc->coded_frame->top_field_first  = in_picture->top_field_first;
845         pkt.data   = (uint8_t *)in_picture;
846         pkt.size   =  sizeof(AVPicture);
847         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
848         pkt.flags |= AV_PKT_FLAG_KEY;
849
850         video_size += pkt.size;
851         write_frame(s, &pkt, ost);
852     } else {
853         int got_packet;
854         AVFrame big_picture;
855
856         big_picture = *in_picture;
857         /* better than nothing: use input picture interlaced
858            settings */
859         big_picture.interlaced_frame = in_picture->interlaced_frame;
860         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
861             if (ost->top_field_first == -1)
862                 big_picture.top_field_first = in_picture->top_field_first;
863             else
864                 big_picture.top_field_first = !!ost->top_field_first;
865         }
866
867         /* handles same_quant here. This is not correct because it may
868            not be a global option */
869         big_picture.quality = quality;
870         if (!enc->me_threshold)
871             big_picture.pict_type = 0;
872         if (ost->forced_kf_index < ost->forced_kf_count &&
873             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
874             big_picture.pict_type = AV_PICTURE_TYPE_I;
875             ost->forced_kf_index++;
876         }
877         update_benchmark(NULL);
878         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
879         update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
880         if (ret < 0) {
881             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
882             exit_program(1);
883         }
884
885         if (got_packet) {
886             if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
887                 pkt.pts = ost->sync_opts;
888
889             if (pkt.pts != AV_NOPTS_VALUE)
890                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
891             if (pkt.dts != AV_NOPTS_VALUE)
892                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
893
894             if (debug_ts) {
895                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
896                     "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
897                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
898                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
899             }
900
901             frame_size = pkt.size;
902             video_size += pkt.size;
903             write_frame(s, &pkt, ost);
904             av_free_packet(&pkt);
905
906             /* if two pass, output log */
907             if (ost->logfile && enc->stats_out) {
908                 fprintf(ost->logfile, "%s", enc->stats_out);
909             }
910         }
911     }
912     ost->sync_opts++;
913     /*
914      * For video, number of frames in == number of packets out.
915      * But there may be reordering, so we can't throw away frames on encoder
916      * flush, we need to limit them here, before they go into encoder.
917      */
918     ost->frame_number++;
919   }
920
921     if (vstats_filename && frame_size)
922         do_video_stats(output_files[ost->file_index]->ctx, ost, frame_size);
923 }
924
925 static double psnr(double d)
926 {
927     return -10.0 * log(d) / log(10.0);
928 }
929
930 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
931                            int frame_size)
932 {
933     AVCodecContext *enc;
934     int frame_number;
935     double ti1, bitrate, avg_bitrate;
936
937     /* this is executed just the first time do_video_stats is called */
938     if (!vstats_file) {
939         vstats_file = fopen(vstats_filename, "w");
940         if (!vstats_file) {
941             perror("fopen");
942             exit_program(1);
943         }
944     }
945
946     enc = ost->st->codec;
947     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
948         frame_number = ost->frame_number;
949         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
950         if (enc->flags&CODEC_FLAG_PSNR)
951             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
952
953         fprintf(vstats_file,"f_size= %6d ", frame_size);
954         /* compute pts value */
955         ti1 = ost->sync_opts * av_q2d(enc->time_base);
956         if (ti1 < 0.01)
957             ti1 = 0.01;
958
959         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
960         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
961         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
962                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
963         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
964     }
965 }
966
967 /**
968  * Get and encode new output from any of the filtergraphs, without causing
969  * activity.
970  *
971  * @return  0 for success, <0 for severe errors
972  */
973 static int reap_filters(void)
974 {
975     AVFilterBufferRef *picref;
976     AVFrame *filtered_frame = NULL;
977     int i;
978     int64_t frame_pts;
979
980     /* Reap all buffers present in the buffer sinks */
981     for (i = 0; i < nb_output_streams; i++) {
982         OutputStream *ost = output_streams[i];
983         OutputFile    *of = output_files[ost->file_index];
984         int ret = 0;
985
986         if (!ost->filter)
987             continue;
988
989         if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
990             return AVERROR(ENOMEM);
991         } else
992             avcodec_get_frame_defaults(ost->filtered_frame);
993         filtered_frame = ost->filtered_frame;
994
995         while (1) {
996             ret = av_buffersink_get_buffer_ref(ost->filter->filter, &picref,
997                                                AV_BUFFERSINK_FLAG_NO_REQUEST);
998             if (ret < 0) {
999                 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1000                     char buf[256];
1001                     av_strerror(ret, buf, sizeof(buf));
1002                     av_log(NULL, AV_LOG_WARNING,
1003                            "Error in av_buffersink_get_buffer_ref(): %s\n", buf);
1004                 }
1005                 break;
1006             }
1007             frame_pts = AV_NOPTS_VALUE;
1008             if (picref->pts != AV_NOPTS_VALUE) {
1009                 filtered_frame->pts = frame_pts = av_rescale_q(picref->pts,
1010                                                 ost->filter->filter->inputs[0]->time_base,
1011                                                 ost->st->codec->time_base) -
1012                                     av_rescale_q(of->start_time,
1013                                                 AV_TIME_BASE_Q,
1014                                                 ost->st->codec->time_base);
1015
1016                 if (of->start_time && filtered_frame->pts < 0) {
1017                     avfilter_unref_buffer(picref);
1018                     continue;
1019                 }
1020             }
1021             //if (ost->source_index >= 0)
1022             //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1023
1024
1025             switch (ost->filter->filter->inputs[0]->type) {
1026             case AVMEDIA_TYPE_VIDEO:
1027                 avfilter_copy_buf_props(filtered_frame, picref);
1028                 filtered_frame->pts = frame_pts;
1029                 if (!ost->frame_aspect_ratio)
1030                     ost->st->codec->sample_aspect_ratio = picref->video->sample_aspect_ratio;
1031
1032                 do_video_out(of->ctx, ost, filtered_frame,
1033                              same_quant ? ost->last_quality :
1034                                           ost->st->codec->global_quality);
1035                 break;
1036             case AVMEDIA_TYPE_AUDIO:
1037                 avfilter_copy_buf_props(filtered_frame, picref);
1038                 filtered_frame->pts = frame_pts;
1039                 do_audio_out(of->ctx, ost, filtered_frame);
1040                 break;
1041             default:
1042                 // TODO support subtitle filters
1043                 av_assert0(0);
1044             }
1045
1046             avfilter_unref_buffer(picref);
1047         }
1048     }
1049
1050     return 0;
1051 }
1052
1053 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
1054 {
1055     char buf[1024];
1056     AVBPrint buf_script;
1057     OutputStream *ost;
1058     AVFormatContext *oc;
1059     int64_t total_size;
1060     AVCodecContext *enc;
1061     int frame_number, vid, i;
1062     double bitrate;
1063     int64_t pts = INT64_MIN;
1064     static int64_t last_time = -1;
1065     static int qp_histogram[52];
1066     int hours, mins, secs, us;
1067
1068     if (!print_stats && !is_last_report && !progress_avio)
1069         return;
1070
1071     if (!is_last_report) {
1072         if (last_time == -1) {
1073             last_time = cur_time;
1074             return;
1075         }
1076         if ((cur_time - last_time) < 500000)
1077             return;
1078         last_time = cur_time;
1079     }
1080
1081
1082     oc = output_files[0]->ctx;
1083
1084     total_size = avio_size(oc->pb);
1085     if (total_size < 0) { // FIXME improve avio_size() so it works with non seekable output too
1086         total_size = avio_tell(oc->pb);
1087         if (total_size < 0)
1088             total_size = 0;
1089     }
1090
1091     buf[0] = '\0';
1092     vid = 0;
1093     av_bprint_init(&buf_script, 0, 1);
1094     for (i = 0; i < nb_output_streams; i++) {
1095         float q = -1;
1096         ost = output_streams[i];
1097         enc = ost->st->codec;
1098         if (!ost->stream_copy && enc->coded_frame)
1099             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1100         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1101             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1102             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1103                        ost->file_index, ost->index, q);
1104         }
1105         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1106             float fps, t = (cur_time-timer_start) / 1000000.0;
1107
1108             frame_number = ost->frame_number;
1109             fps = t > 1 ? frame_number / t : 0;
1110             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
1111                      frame_number, fps < 9.95, fps, q);
1112             av_bprintf(&buf_script, "frame=%d\n", frame_number);
1113             av_bprintf(&buf_script, "fps=%.1f\n", fps);
1114             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1115                        ost->file_index, ost->index, q);
1116             if (is_last_report)
1117                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1118             if (qp_hist) {
1119                 int j;
1120                 int qp = lrintf(q);
1121                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1122                     qp_histogram[qp]++;
1123                 for (j = 0; j < 32; j++)
1124                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
1125             }
1126             if (enc->flags&CODEC_FLAG_PSNR) {
1127                 int j;
1128                 double error, error_sum = 0;
1129                 double scale, scale_sum = 0;
1130                 double p;
1131                 char type[3] = { 'Y','U','V' };
1132                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1133                 for (j = 0; j < 3; j++) {
1134                     if (is_last_report) {
1135                         error = enc->error[j];
1136                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1137                     } else {
1138                         error = enc->coded_frame->error[j];
1139                         scale = enc->width * enc->height * 255.0 * 255.0;
1140                     }
1141                     if (j)
1142                         scale /= 4;
1143                     error_sum += error;
1144                     scale_sum += scale;
1145                     p = psnr(error / scale);
1146                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], p);
1147                     av_bprintf(&buf_script, "stream_%d_%d_psnr_%c=%2.2f\n",
1148                                ost->file_index, ost->index, type[i] | 32, p);
1149                 }
1150                 p = psnr(error_sum / scale_sum);
1151                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1152                 av_bprintf(&buf_script, "stream_%d_%d_psnr_all=%2.2f\n",
1153                            ost->file_index, ost->index, p);
1154             }
1155             vid = 1;
1156         }
1157         /* compute min output value */
1158         if ((is_last_report || !ost->finished) && ost->st->pts.val != AV_NOPTS_VALUE)
1159             pts = FFMAX(pts, av_rescale_q(ost->st->pts.val,
1160                                           ost->st->time_base, AV_TIME_BASE_Q));
1161     }
1162
1163     secs = pts / AV_TIME_BASE;
1164     us = pts % AV_TIME_BASE;
1165     mins = secs / 60;
1166     secs %= 60;
1167     hours = mins / 60;
1168     mins %= 60;
1169
1170     bitrate = pts ? total_size * 8 / (pts / 1000.0) : 0;
1171
1172     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1173              "size=%8.0fkB time=", total_size / 1024.0);
1174     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1175              "%02d:%02d:%02d.%02d ", hours, mins, secs,
1176              (100 * us) / AV_TIME_BASE);
1177     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1178              "bitrate=%6.1fkbits/s", bitrate);
1179     av_bprintf(&buf_script, "total_size=%"PRId64"\n", total_size);
1180     av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
1181     av_bprintf(&buf_script, "out_time=%02d:%02d:%02d.%06d\n",
1182                hours, mins, secs, us);
1183
1184     if (nb_frames_dup || nb_frames_drop)
1185         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1186                 nb_frames_dup, nb_frames_drop);
1187     av_bprintf(&buf_script, "dup_frames=%d\n", nb_frames_dup);
1188     av_bprintf(&buf_script, "drop_frames=%d\n", nb_frames_drop);
1189
1190     if (print_stats || is_last_report) {
1191     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1192
1193     fflush(stderr);
1194     }
1195
1196     if (progress_avio) {
1197         av_bprintf(&buf_script, "progress=%s\n",
1198                    is_last_report ? "end" : "continue");
1199         avio_write(progress_avio, buf_script.str,
1200                    FFMIN(buf_script.len, buf_script.size - 1));
1201         avio_flush(progress_avio);
1202         av_bprint_finalize(&buf_script, NULL);
1203         if (is_last_report) {
1204             avio_close(progress_avio);
1205             progress_avio = NULL;
1206         }
1207     }
1208
1209     if (is_last_report) {
1210         int64_t raw= audio_size + video_size + subtitle_size + extra_size;
1211         av_log(NULL, AV_LOG_INFO, "\n");
1212         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB subtitle:%1.0f global headers:%1.0fkB muxing overhead %f%%\n",
1213                video_size / 1024.0,
1214                audio_size / 1024.0,
1215                subtitle_size / 1024.0,
1216                extra_size / 1024.0,
1217                100.0 * (total_size - raw) / raw
1218         );
1219         if(video_size + audio_size + subtitle_size + extra_size == 0){
1220             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
1221         }
1222     }
1223 }
1224
1225 static void flush_encoders(void)
1226 {
1227     int i, ret;
1228
1229     for (i = 0; i < nb_output_streams; i++) {
1230         OutputStream   *ost = output_streams[i];
1231         AVCodecContext *enc = ost->st->codec;
1232         AVFormatContext *os = output_files[ost->file_index]->ctx;
1233         int stop_encoding = 0;
1234
1235         if (!ost->encoding_needed)
1236             continue;
1237
1238         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1239             continue;
1240         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
1241             continue;
1242
1243         for (;;) {
1244             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1245             const char *desc;
1246             int64_t *size;
1247
1248             switch (ost->st->codec->codec_type) {
1249             case AVMEDIA_TYPE_AUDIO:
1250                 encode = avcodec_encode_audio2;
1251                 desc   = "Audio";
1252                 size   = &audio_size;
1253                 break;
1254             case AVMEDIA_TYPE_VIDEO:
1255                 encode = avcodec_encode_video2;
1256                 desc   = "Video";
1257                 size   = &video_size;
1258                 break;
1259             default:
1260                 stop_encoding = 1;
1261             }
1262
1263             if (encode) {
1264                 AVPacket pkt;
1265                 int got_packet;
1266                 av_init_packet(&pkt);
1267                 pkt.data = NULL;
1268                 pkt.size = 0;
1269
1270                 update_benchmark(NULL);
1271                 ret = encode(enc, &pkt, NULL, &got_packet);
1272                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
1273                 if (ret < 0) {
1274                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1275                     exit_program(1);
1276                 }
1277                 *size += pkt.size;
1278                 if (ost->logfile && enc->stats_out) {
1279                     fprintf(ost->logfile, "%s", enc->stats_out);
1280                 }
1281                 if (!got_packet) {
1282                     stop_encoding = 1;
1283                     break;
1284                 }
1285                 if (pkt.pts != AV_NOPTS_VALUE)
1286                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1287                 if (pkt.dts != AV_NOPTS_VALUE)
1288                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1289                 write_frame(os, &pkt, ost);
1290             }
1291
1292             if (stop_encoding)
1293                 break;
1294         }
1295     }
1296 }
1297
1298 /*
1299  * Check whether a packet from ist should be written into ost at this time
1300  */
1301 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1302 {
1303     OutputFile *of = output_files[ost->file_index];
1304     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1305
1306     if (ost->source_index != ist_index)
1307         return 0;
1308
1309     if (of->start_time && ist->pts < of->start_time)
1310         return 0;
1311
1312     return 1;
1313 }
1314
1315 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1316 {
1317     OutputFile *of = output_files[ost->file_index];
1318     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
1319     AVPicture pict;
1320     AVPacket opkt;
1321
1322     av_init_packet(&opkt);
1323
1324     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1325         !ost->copy_initial_nonkeyframes)
1326         return;
1327
1328     if (of->recording_time != INT64_MAX &&
1329         ist->pts >= of->recording_time + of->start_time) {
1330         close_output_stream(ost);
1331         return;
1332     }
1333
1334     /* force the input stream PTS */
1335     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1336         audio_size += pkt->size;
1337     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1338         video_size += pkt->size;
1339         ost->sync_opts++;
1340     } else if (ost->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1341         subtitle_size += pkt->size;
1342     }
1343
1344     if (pkt->pts != AV_NOPTS_VALUE)
1345         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1346     else
1347         opkt.pts = AV_NOPTS_VALUE;
1348
1349     if (pkt->dts == AV_NOPTS_VALUE)
1350         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
1351     else
1352         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1353     opkt.dts -= ost_tb_start_time;
1354
1355     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1356     opkt.flags    = pkt->flags;
1357
1358     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1359     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1360        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1361        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1362        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1363        ) {
1364         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1365             opkt.destruct = av_destruct_packet;
1366     } else {
1367         opkt.data = pkt->data;
1368         opkt.size = pkt->size;
1369     }
1370
1371     if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (of->ctx->oformat->flags & AVFMT_RAWPICTURE)) {
1372         /* store AVPicture in AVPacket, as expected by the output format */
1373         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
1374         opkt.data = (uint8_t *)&pict;
1375         opkt.size = sizeof(AVPicture);
1376         opkt.flags |= AV_PKT_FLAG_KEY;
1377     }
1378
1379     write_frame(of->ctx, &opkt, ost);
1380     ost->st->codec->frame_number++;
1381     av_free_packet(&opkt);
1382 }
1383
1384 static void rate_emu_sleep(InputStream *ist)
1385 {
1386     if (input_files[ist->file_index]->rate_emu) {
1387         int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
1388         int64_t now = av_gettime() - ist->start;
1389         if (pts > now)
1390             av_usleep(pts - now);
1391     }
1392 }
1393
1394 int guess_input_channel_layout(InputStream *ist)
1395 {
1396     AVCodecContext *dec = ist->st->codec;
1397
1398     if (!dec->channel_layout) {
1399         char layout_name[256];
1400
1401         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1402         if (!dec->channel_layout)
1403             return 0;
1404         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1405                                      dec->channels, dec->channel_layout);
1406         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1407                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1408     }
1409     return 1;
1410 }
1411
1412 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1413 {
1414     AVFrame *decoded_frame;
1415     AVCodecContext *avctx = ist->st->codec;
1416     int i, ret, resample_changed;
1417     AVRational decoded_frame_tb;
1418
1419     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1420         return AVERROR(ENOMEM);
1421     else
1422         avcodec_get_frame_defaults(ist->decoded_frame);
1423     decoded_frame = ist->decoded_frame;
1424
1425     update_benchmark(NULL);
1426     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1427     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
1428
1429     if (ret >= 0 && avctx->sample_rate <= 0) {
1430         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
1431         ret = AVERROR_INVALIDDATA;
1432     }
1433
1434     if (!*got_output || ret < 0) {
1435         if (!pkt->size) {
1436             for (i = 0; i < ist->nb_filters; i++)
1437                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1438         }
1439         return ret;
1440     }
1441
1442 #if 1
1443     /* increment next_dts to use for the case where the input stream does not
1444        have timestamps or there are multiple frames in the packet */
1445     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1446                      avctx->sample_rate;
1447     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1448                      avctx->sample_rate;
1449 #endif
1450
1451     rate_emu_sleep(ist);
1452
1453     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1454                        ist->resample_channels       != avctx->channels               ||
1455                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1456                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1457     if (resample_changed) {
1458         char layout1[64], layout2[64];
1459
1460         if (!guess_input_channel_layout(ist)) {
1461             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1462                    "layout for Input Stream #%d.%d\n", ist->file_index,
1463                    ist->st->index);
1464             exit_program(1);
1465         }
1466         decoded_frame->channel_layout = avctx->channel_layout;
1467
1468         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1469                                      ist->resample_channel_layout);
1470         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1471                                      decoded_frame->channel_layout);
1472
1473         av_log(NULL, AV_LOG_INFO,
1474                "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",
1475                ist->file_index, ist->st->index,
1476                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1477                ist->resample_channels, layout1,
1478                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1479                avctx->channels, layout2);
1480
1481         ist->resample_sample_fmt     = decoded_frame->format;
1482         ist->resample_sample_rate    = decoded_frame->sample_rate;
1483         ist->resample_channel_layout = decoded_frame->channel_layout;
1484         ist->resample_channels       = avctx->channels;
1485
1486         for (i = 0; i < nb_filtergraphs; i++)
1487             if (ist_in_filtergraph(filtergraphs[i], ist)) {
1488                 FilterGraph *fg = filtergraphs[i];
1489                 int j;
1490                 if (configure_filtergraph(fg) < 0) {
1491                     av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1492                     exit_program(1);
1493                 }
1494                 for (j = 0; j < fg->nb_outputs; j++) {
1495                     OutputStream *ost = fg->outputs[j]->ost;
1496                     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1497                         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1498                         av_buffersink_set_frame_size(ost->filter->filter,
1499                                                      ost->st->codec->frame_size);
1500                 }
1501             }
1502     }
1503
1504     /* if the decoder provides a pts, use it instead of the last packet pts.
1505        the decoder could be delaying output by a packet or more. */
1506     if (decoded_frame->pts != AV_NOPTS_VALUE) {
1507         ist->dts = ist->next_dts = ist->pts = ist->next_pts = av_rescale_q(decoded_frame->pts, avctx->time_base, AV_TIME_BASE_Q);
1508         decoded_frame_tb   = avctx->time_base;
1509     } else if (decoded_frame->pkt_pts != AV_NOPTS_VALUE) {
1510         decoded_frame->pts = decoded_frame->pkt_pts;
1511         pkt->pts           = AV_NOPTS_VALUE;
1512         decoded_frame_tb   = ist->st->time_base;
1513     } else if (pkt->pts != AV_NOPTS_VALUE) {
1514         decoded_frame->pts = pkt->pts;
1515         pkt->pts           = AV_NOPTS_VALUE;
1516         decoded_frame_tb   = ist->st->time_base;
1517     }else {
1518         decoded_frame->pts = ist->dts;
1519         decoded_frame_tb   = AV_TIME_BASE_Q;
1520     }
1521     if (decoded_frame->pts != AV_NOPTS_VALUE)
1522         decoded_frame->pts = av_rescale_q(decoded_frame->pts,
1523                                           decoded_frame_tb,
1524                                           (AVRational){1, ist->st->codec->sample_rate});
1525     for (i = 0; i < ist->nb_filters; i++)
1526         av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame,
1527                                AV_BUFFERSRC_FLAG_PUSH);
1528
1529     decoded_frame->pts = AV_NOPTS_VALUE;
1530
1531     return ret;
1532 }
1533
1534 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1535 {
1536     AVFrame *decoded_frame;
1537     void *buffer_to_free = NULL;
1538     int i, ret = 0, resample_changed;
1539     int64_t best_effort_timestamp;
1540     AVRational *frame_sample_aspect;
1541     float quality;
1542
1543     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1544         return AVERROR(ENOMEM);
1545     else
1546         avcodec_get_frame_defaults(ist->decoded_frame);
1547     decoded_frame = ist->decoded_frame;
1548     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
1549
1550     update_benchmark(NULL);
1551     ret = avcodec_decode_video2(ist->st->codec,
1552                                 decoded_frame, got_output, pkt);
1553     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
1554     if (!*got_output || ret < 0) {
1555         if (!pkt->size) {
1556             for (i = 0; i < ist->nb_filters; i++)
1557                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1558         }
1559         return ret;
1560     }
1561
1562     quality = same_quant ? decoded_frame->quality : 0;
1563
1564     if(ist->top_field_first>=0)
1565         decoded_frame->top_field_first = ist->top_field_first;
1566
1567     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
1568     if(best_effort_timestamp != AV_NOPTS_VALUE)
1569         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
1570
1571     if (debug_ts) {
1572         av_log(NULL, AV_LOG_INFO, "decoder -> ist_index:%d type:video "
1573                 "frame_pts:%s frame_pts_time:%s best_effort_ts:%"PRId64" best_effort_ts_time:%s keyframe:%d frame_type:%d \n",
1574                 ist->st->index, av_ts2str(decoded_frame->pts),
1575                 av_ts2timestr(decoded_frame->pts, &ist->st->time_base),
1576                 best_effort_timestamp,
1577                 av_ts2timestr(best_effort_timestamp, &ist->st->time_base),
1578                 decoded_frame->key_frame, decoded_frame->pict_type);
1579     }
1580
1581     pkt->size = 0;
1582     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
1583
1584     rate_emu_sleep(ist);
1585
1586     if (ist->st->sample_aspect_ratio.num)
1587         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1588
1589     resample_changed = ist->resample_width   != decoded_frame->width  ||
1590                        ist->resample_height  != decoded_frame->height ||
1591                        ist->resample_pix_fmt != decoded_frame->format;
1592     if (resample_changed) {
1593         av_log(NULL, AV_LOG_INFO,
1594                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1595                ist->file_index, ist->st->index,
1596                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1597                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1598
1599         ist->resample_width   = decoded_frame->width;
1600         ist->resample_height  = decoded_frame->height;
1601         ist->resample_pix_fmt = decoded_frame->format;
1602
1603         for (i = 0; i < nb_filtergraphs; i++)
1604             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1605                 configure_filtergraph(filtergraphs[i]) < 0) {
1606                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1607                 exit_program(1);
1608             }
1609     }
1610
1611     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
1612     for (i = 0; i < ist->nb_filters; i++) {
1613         int changed =      ist->st->codec->width   != ist->filters[i]->filter->outputs[0]->w
1614                         || ist->st->codec->height  != ist->filters[i]->filter->outputs[0]->h
1615                         || ist->st->codec->pix_fmt != ist->filters[i]->filter->outputs[0]->format;
1616         // XXX what an ugly hack
1617         if (ist->filters[i]->graph->nb_outputs == 1)
1618             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
1619
1620         if (!frame_sample_aspect->num)
1621             *frame_sample_aspect = ist->st->sample_aspect_ratio;
1622         if (ist->dr1 && decoded_frame->type==FF_BUFFER_TYPE_USER && !changed) {
1623             FrameBuffer      *buf = decoded_frame->opaque;
1624             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
1625                                         decoded_frame->data, decoded_frame->linesize,
1626                                         AV_PERM_READ | AV_PERM_PRESERVE,
1627                                         ist->st->codec->width, ist->st->codec->height,
1628                                         ist->st->codec->pix_fmt);
1629
1630             avfilter_copy_frame_props(fb, decoded_frame);
1631             fb->buf->priv           = buf;
1632             fb->buf->free           = filter_release_buffer;
1633
1634             av_assert0(buf->refcount>0);
1635             buf->refcount++;
1636             av_buffersrc_add_ref(ist->filters[i]->filter, fb,
1637                                  AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT |
1638                                  AV_BUFFERSRC_FLAG_NO_COPY |
1639                                  AV_BUFFERSRC_FLAG_PUSH);
1640         } else
1641         if(av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, AV_BUFFERSRC_FLAG_PUSH)<0) {
1642             av_log(NULL, AV_LOG_FATAL, "Failed to inject frame into filter network\n");
1643             exit_program(1);
1644         }
1645
1646     }
1647
1648     av_free(buffer_to_free);
1649     return ret;
1650 }
1651
1652 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1653 {
1654     AVSubtitle subtitle;
1655     int64_t pts = pkt->pts;
1656     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1657                                           &subtitle, got_output, pkt);
1658     if (ret < 0 || !*got_output) {
1659         if (!pkt->size)
1660             sub2video_flush(ist);
1661         return ret;
1662     }
1663
1664     if (ist->fix_sub_duration) {
1665         if (ist->prev_sub.got_output) {
1666             int end = av_rescale_q(pts - ist->prev_sub.pts, ist->st->time_base,
1667                                    (AVRational){ 1, 1000 });
1668             if (end < ist->prev_sub.subtitle.end_display_time) {
1669                 av_log(ist->st->codec, AV_LOG_DEBUG,
1670                        "Subtitle duration reduced from %d to %d\n",
1671                        ist->prev_sub.subtitle.end_display_time, end);
1672                 ist->prev_sub.subtitle.end_display_time = end;
1673             }
1674         }
1675         FFSWAP(int64_t,    pts,         ist->prev_sub.pts);
1676         FFSWAP(int,        *got_output, ist->prev_sub.got_output);
1677         FFSWAP(int,        ret,         ist->prev_sub.ret);
1678         FFSWAP(AVSubtitle, subtitle,    ist->prev_sub.subtitle);
1679     }
1680
1681     if (!*got_output || !subtitle.num_rects)
1682         return ret;
1683
1684     rate_emu_sleep(ist);
1685
1686     sub2video_update(ist, &subtitle, pkt->pts);
1687
1688     for (i = 0; i < nb_output_streams; i++) {
1689         OutputStream *ost = output_streams[i];
1690
1691         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1692             continue;
1693
1694         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pts);
1695     }
1696
1697     avsubtitle_free(&subtitle);
1698     return ret;
1699 }
1700
1701 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1702 static int output_packet(InputStream *ist, const AVPacket *pkt)
1703 {
1704     int ret = 0, i;
1705     int got_output;
1706
1707     AVPacket avpkt;
1708     if (!ist->saw_first_ts) {
1709         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;
1710         ist->pts = 0;
1711         if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
1712             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
1713             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
1714         }
1715         ist->saw_first_ts = 1;
1716     }
1717
1718     if (ist->next_dts == AV_NOPTS_VALUE)
1719         ist->next_dts = ist->dts;
1720     if (ist->next_pts == AV_NOPTS_VALUE)
1721         ist->next_pts = ist->pts;
1722
1723     if (pkt == NULL) {
1724         /* EOF handling */
1725         av_init_packet(&avpkt);
1726         avpkt.data = NULL;
1727         avpkt.size = 0;
1728         goto handle_eof;
1729     } else {
1730         avpkt = *pkt;
1731     }
1732
1733     if (pkt->dts != AV_NOPTS_VALUE) {
1734         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1735         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
1736             ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1737     }
1738
1739     // while we have more to decode or while the decoder did output something on EOF
1740     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1741         int duration;
1742     handle_eof:
1743
1744         ist->pts = ist->next_pts;
1745         ist->dts = ist->next_dts;
1746
1747         if (avpkt.size && avpkt.size != pkt->size) {
1748             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1749                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1750             ist->showed_multi_packet_warning = 1;
1751         }
1752
1753         switch (ist->st->codec->codec_type) {
1754         case AVMEDIA_TYPE_AUDIO:
1755             ret = decode_audio    (ist, &avpkt, &got_output);
1756             break;
1757         case AVMEDIA_TYPE_VIDEO:
1758             ret = decode_video    (ist, &avpkt, &got_output);
1759             if (avpkt.duration) {
1760                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1761             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
1762                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
1763                 duration = ((int64_t)AV_TIME_BASE *
1764                                 ist->st->codec->time_base.num * ticks) /
1765                                 ist->st->codec->time_base.den;
1766             } else
1767                 duration = 0;
1768
1769             if(ist->dts != AV_NOPTS_VALUE && duration) {
1770                 ist->next_dts += duration;
1771             }else
1772                 ist->next_dts = AV_NOPTS_VALUE;
1773
1774             if (got_output)
1775                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
1776             break;
1777         case AVMEDIA_TYPE_SUBTITLE:
1778             ret = transcode_subtitles(ist, &avpkt, &got_output);
1779             break;
1780         default:
1781             return -1;
1782         }
1783
1784         if (ret < 0)
1785             return ret;
1786
1787         avpkt.dts=
1788         avpkt.pts= AV_NOPTS_VALUE;
1789
1790         // touch data and size only if not EOF
1791         if (pkt) {
1792             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
1793                 ret = avpkt.size;
1794             avpkt.data += ret;
1795             avpkt.size -= ret;
1796         }
1797         if (!got_output) {
1798             continue;
1799         }
1800     }
1801
1802     /* handle stream copy */
1803     if (!ist->decoding_needed) {
1804         rate_emu_sleep(ist);
1805         ist->dts = ist->next_dts;
1806         switch (ist->st->codec->codec_type) {
1807         case AVMEDIA_TYPE_AUDIO:
1808             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1809                              ist->st->codec->sample_rate;
1810             break;
1811         case AVMEDIA_TYPE_VIDEO:
1812             if (pkt->duration) {
1813                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
1814             } else if(ist->st->codec->time_base.num != 0) {
1815                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
1816                 ist->next_dts += ((int64_t)AV_TIME_BASE *
1817                                   ist->st->codec->time_base.num * ticks) /
1818                                   ist->st->codec->time_base.den;
1819             }
1820             break;
1821         }
1822         ist->pts = ist->dts;
1823         ist->next_pts = ist->next_dts;
1824     }
1825     for (i = 0; pkt && i < nb_output_streams; i++) {
1826         OutputStream *ost = output_streams[i];
1827
1828         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1829             continue;
1830
1831         do_streamcopy(ist, ost, pkt);
1832     }
1833
1834     return 0;
1835 }
1836
1837 static void print_sdp(void)
1838 {
1839     char sdp[2048];
1840     int i;
1841     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
1842
1843     if (!avc)
1844         exit_program(1);
1845     for (i = 0; i < nb_output_files; i++)
1846         avc[i] = output_files[i]->ctx;
1847
1848     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
1849     printf("SDP:\n%s\n", sdp);
1850     fflush(stdout);
1851     av_freep(&avc);
1852 }
1853
1854 static int init_input_stream(int ist_index, char *error, int error_len)
1855 {
1856     InputStream *ist = input_streams[ist_index];
1857
1858     if (ist->decoding_needed) {
1859         AVCodec *codec = ist->dec;
1860         if (!codec) {
1861             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
1862                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
1863             return AVERROR(EINVAL);
1864         }
1865
1866         ist->dr1 = (codec->capabilities & CODEC_CAP_DR1) && !do_deinterlace;
1867         if (codec->type == AVMEDIA_TYPE_VIDEO && ist->dr1) {
1868             ist->st->codec->get_buffer     = codec_get_buffer;
1869             ist->st->codec->release_buffer = codec_release_buffer;
1870             ist->st->codec->opaque         = &ist->buffer_pool;
1871         }
1872
1873         if (!av_dict_get(ist->opts, "threads", NULL, 0))
1874             av_dict_set(&ist->opts, "threads", "auto", 0);
1875         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
1876             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
1877                     ist->file_index, ist->st->index);
1878             return AVERROR(EINVAL);
1879         }
1880         assert_codec_experimental(ist->st->codec, 0);
1881         assert_avoptions(ist->opts);
1882     }
1883
1884     ist->next_pts = AV_NOPTS_VALUE;
1885     ist->next_dts = AV_NOPTS_VALUE;
1886     ist->is_start = 1;
1887
1888     return 0;
1889 }
1890
1891 static InputStream *get_input_stream(OutputStream *ost)
1892 {
1893     if (ost->source_index >= 0)
1894         return input_streams[ost->source_index];
1895     return NULL;
1896 }
1897
1898 static void parse_forced_key_frames(char *kf, OutputStream *ost,
1899                                     AVCodecContext *avctx)
1900 {
1901     char *p;
1902     int n = 1, i;
1903     int64_t t;
1904
1905     for (p = kf; *p; p++)
1906         if (*p == ',')
1907             n++;
1908     ost->forced_kf_count = n;
1909     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
1910     if (!ost->forced_kf_pts) {
1911         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
1912         exit_program(1);
1913     }
1914
1915     p = kf;
1916     for (i = 0; i < n; i++) {
1917         char *next = strchr(p, ',');
1918
1919         if (next)
1920             *next++ = 0;
1921
1922         t = parse_time_or_die("force_key_frames", p, 1);
1923         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
1924
1925         p = next;
1926     }
1927 }
1928
1929 static void report_new_stream(int input_index, AVPacket *pkt)
1930 {
1931     InputFile *file = input_files[input_index];
1932     AVStream *st = file->ctx->streams[pkt->stream_index];
1933
1934     if (pkt->stream_index < file->nb_streams_warn)
1935         return;
1936     av_log(file->ctx, AV_LOG_WARNING,
1937            "New %s stream %d:%d at pos:%"PRId64" and DTS:%ss\n",
1938            av_get_media_type_string(st->codec->codec_type),
1939            input_index, pkt->stream_index,
1940            pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
1941     file->nb_streams_warn = pkt->stream_index + 1;
1942 }
1943
1944 static int transcode_init(void)
1945 {
1946     int ret = 0, i, j, k;
1947     AVFormatContext *oc;
1948     AVCodecContext *codec;
1949     OutputStream *ost;
1950     InputStream *ist;
1951     char error[1024];
1952     int want_sdp = 1;
1953
1954     /* init framerate emulation */
1955     for (i = 0; i < nb_input_files; i++) {
1956         InputFile *ifile = input_files[i];
1957         if (ifile->rate_emu)
1958             for (j = 0; j < ifile->nb_streams; j++)
1959                 input_streams[j + ifile->ist_index]->start = av_gettime();
1960     }
1961
1962     /* output stream init */
1963     for (i = 0; i < nb_output_files; i++) {
1964         oc = output_files[i]->ctx;
1965         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
1966             av_dump_format(oc, i, oc->filename, 1);
1967             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
1968             return AVERROR(EINVAL);
1969         }
1970     }
1971
1972     /* init complex filtergraphs */
1973     for (i = 0; i < nb_filtergraphs; i++)
1974         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
1975             return ret;
1976
1977     /* for each output stream, we compute the right encoding parameters */
1978     for (i = 0; i < nb_output_streams; i++) {
1979         AVCodecContext *icodec = NULL;
1980         ost = output_streams[i];
1981         oc  = output_files[ost->file_index]->ctx;
1982         ist = get_input_stream(ost);
1983
1984         if (ost->attachment_filename)
1985             continue;
1986
1987         codec  = ost->st->codec;
1988
1989         if (ist) {
1990             icodec = ist->st->codec;
1991
1992             ost->st->disposition          = ist->st->disposition;
1993             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
1994             codec->chroma_sample_location = icodec->chroma_sample_location;
1995         }
1996
1997         if (ost->stream_copy) {
1998             uint64_t extra_size;
1999
2000             av_assert0(ist && !ost->filter);
2001
2002             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2003
2004             if (extra_size > INT_MAX) {
2005                 return AVERROR(EINVAL);
2006             }
2007
2008             /* if stream_copy is selected, no need to decode or encode */
2009             codec->codec_id   = icodec->codec_id;
2010             codec->codec_type = icodec->codec_type;
2011
2012             if (!codec->codec_tag) {
2013                 if (!oc->oformat->codec_tag ||
2014                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2015                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2016                     codec->codec_tag = icodec->codec_tag;
2017             }
2018
2019             codec->bit_rate       = icodec->bit_rate;
2020             codec->rc_max_rate    = icodec->rc_max_rate;
2021             codec->rc_buffer_size = icodec->rc_buffer_size;
2022             codec->field_order    = icodec->field_order;
2023             codec->extradata      = av_mallocz(extra_size);
2024             if (!codec->extradata) {
2025                 return AVERROR(ENOMEM);
2026             }
2027             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2028             codec->extradata_size= icodec->extradata_size;
2029             codec->bits_per_coded_sample  = icodec->bits_per_coded_sample;
2030
2031             codec->time_base = ist->st->time_base;
2032             /*
2033              * Avi is a special case here because it supports variable fps but
2034              * having the fps and timebase differe significantly adds quite some
2035              * overhead
2036              */
2037             if(!strcmp(oc->oformat->name, "avi")) {
2038                 if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
2039                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
2040                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(icodec->time_base)
2041                                && av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(icodec->time_base) < 1.0/500
2042                      || copy_tb==2){
2043                     codec->time_base.num = ist->st->r_frame_rate.den;
2044                     codec->time_base.den = 2*ist->st->r_frame_rate.num;
2045                     codec->ticks_per_frame = 2;
2046                 } else if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2047                                  && av_q2d(ist->st->time_base) < 1.0/500
2048                     || copy_tb==0){
2049                     codec->time_base = icodec->time_base;
2050                     codec->time_base.num *= icodec->ticks_per_frame;
2051                     codec->time_base.den *= 2;
2052                     codec->ticks_per_frame = 2;
2053                 }
2054             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2055                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2056                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2057             ) {
2058                 if(   copy_tb<0 && icodec->time_base.den
2059                                 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
2060                                 && av_q2d(ist->st->time_base) < 1.0/500
2061                    || copy_tb==0){
2062                     codec->time_base = icodec->time_base;
2063                     codec->time_base.num *= icodec->ticks_per_frame;
2064                 }
2065             }
2066
2067             if(ost->frame_rate.num)
2068                 codec->time_base = av_inv_q(ost->frame_rate);
2069
2070             av_reduce(&codec->time_base.num, &codec->time_base.den,
2071                         codec->time_base.num, codec->time_base.den, INT_MAX);
2072
2073             switch (codec->codec_type) {
2074             case AVMEDIA_TYPE_AUDIO:
2075                 if (audio_volume != 256) {
2076                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2077                     exit_program(1);
2078                 }
2079                 codec->channel_layout     = icodec->channel_layout;
2080                 codec->sample_rate        = icodec->sample_rate;
2081                 codec->channels           = icodec->channels;
2082                 codec->frame_size         = icodec->frame_size;
2083                 codec->audio_service_type = icodec->audio_service_type;
2084                 codec->block_align        = icodec->block_align;
2085                 if((codec->block_align == 1 || codec->block_align == 1152) && codec->codec_id == AV_CODEC_ID_MP3)
2086                     codec->block_align= 0;
2087                 if(codec->codec_id == AV_CODEC_ID_AC3)
2088                     codec->block_align= 0;
2089                 break;
2090             case AVMEDIA_TYPE_VIDEO:
2091                 codec->pix_fmt            = icodec->pix_fmt;
2092                 codec->width              = icodec->width;
2093                 codec->height             = icodec->height;
2094                 codec->has_b_frames       = icodec->has_b_frames;
2095                 if (!codec->sample_aspect_ratio.num) {
2096                     codec->sample_aspect_ratio   =
2097                     ost->st->sample_aspect_ratio =
2098                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2099                         ist->st->codec->sample_aspect_ratio.num ?
2100                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2101                 }
2102                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2103                 break;
2104             case AVMEDIA_TYPE_SUBTITLE:
2105                 codec->width  = icodec->width;
2106                 codec->height = icodec->height;
2107                 break;
2108             case AVMEDIA_TYPE_DATA:
2109             case AVMEDIA_TYPE_ATTACHMENT:
2110                 break;
2111             default:
2112                 abort();
2113             }
2114         } else {
2115             if (!ost->enc)
2116                 ost->enc = avcodec_find_encoder(codec->codec_id);
2117             if (!ost->enc) {
2118                 /* should only happen when a default codec is not present. */
2119                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
2120                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
2121                 ret = AVERROR(EINVAL);
2122                 goto dump_format;
2123             }
2124
2125             if (ist)
2126                 ist->decoding_needed++;
2127             ost->encoding_needed = 1;
2128
2129             if (!ost->filter &&
2130                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2131                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2132                     FilterGraph *fg;
2133                     fg = init_simple_filtergraph(ist, ost);
2134                     if (configure_filtergraph(fg)) {
2135                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2136                         exit(1);
2137                     }
2138             }
2139
2140             if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2141                 if (ost->filter && !ost->frame_rate.num)
2142                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
2143                 if (ist && !ost->frame_rate.num)
2144                     ost->frame_rate = ist->framerate;
2145                 if (ist && !ost->frame_rate.num)
2146                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
2147 //                    ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
2148                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2149                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2150                     ost->frame_rate = ost->enc->supported_framerates[idx];
2151                 }
2152             }
2153
2154             switch (codec->codec_type) {
2155             case AVMEDIA_TYPE_AUDIO:
2156                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2157                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2158                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2159                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
2160                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2161                 break;
2162             case AVMEDIA_TYPE_VIDEO:
2163                 codec->time_base = av_inv_q(ost->frame_rate);
2164                 if (ost->filter && !(codec->time_base.num && codec->time_base.den))
2165                     codec->time_base = ost->filter->filter->inputs[0]->time_base;
2166                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
2167                    && (video_sync_method == VSYNC_CFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
2168                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
2169                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
2170                 }
2171                 for (j = 0; j < ost->forced_kf_count; j++)
2172                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
2173                                                          AV_TIME_BASE_Q,
2174                                                          codec->time_base);
2175
2176                 codec->width  = ost->filter->filter->inputs[0]->w;
2177                 codec->height = ost->filter->filter->inputs[0]->h;
2178                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2179                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
2180                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
2181                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2182                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2183
2184                 if (!icodec ||
2185                     codec->width   != icodec->width  ||
2186                     codec->height  != icodec->height ||
2187                     codec->pix_fmt != icodec->pix_fmt) {
2188                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
2189                 }
2190
2191                 if (ost->forced_keyframes)
2192                     parse_forced_key_frames(ost->forced_keyframes, ost,
2193                                             ost->st->codec);
2194                 break;
2195             case AVMEDIA_TYPE_SUBTITLE:
2196                 codec->time_base = (AVRational){1, 1000};
2197                 if (!codec->width) {
2198                     codec->width     = input_streams[ost->source_index]->st->codec->width;
2199                     codec->height    = input_streams[ost->source_index]->st->codec->height;
2200                 }
2201                 break;
2202             default:
2203                 abort();
2204                 break;
2205             }
2206             /* two pass mode */
2207             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
2208                 char logfilename[1024];
2209                 FILE *f;
2210
2211                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2212                          ost->logfile_prefix ? ost->logfile_prefix :
2213                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
2214                          i);
2215                 if (!strcmp(ost->enc->name, "libx264")) {
2216                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2217                 } else {
2218                     if (codec->flags & CODEC_FLAG_PASS2) {
2219                         char  *logbuffer;
2220                         size_t logbuffer_size;
2221                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2222                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2223                                    logfilename);
2224                             exit_program(1);
2225                         }
2226                         codec->stats_in = logbuffer;
2227                     }
2228                     if (codec->flags & CODEC_FLAG_PASS1) {
2229                         f = fopen(logfilename, "wb");
2230                         if (!f) {
2231                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2232                                 logfilename, strerror(errno));
2233                             exit_program(1);
2234                         }
2235                         ost->logfile = f;
2236                     }
2237                 }
2238             }
2239         }
2240     }
2241
2242     /* open each encoder */
2243     for (i = 0; i < nb_output_streams; i++) {
2244         ost = output_streams[i];
2245         if (ost->encoding_needed) {
2246             AVCodec      *codec = ost->enc;
2247             AVCodecContext *dec = NULL;
2248
2249             if ((ist = get_input_stream(ost)))
2250                 dec = ist->st->codec;
2251             if (dec && dec->subtitle_header) {
2252                 /* ASS code assumes this buffer is null terminated so add extra byte. */
2253                 ost->st->codec->subtitle_header = av_mallocz(dec->subtitle_header_size + 1);
2254                 if (!ost->st->codec->subtitle_header) {
2255                     ret = AVERROR(ENOMEM);
2256                     goto dump_format;
2257                 }
2258                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2259                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2260             }
2261             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2262                 av_dict_set(&ost->opts, "threads", "auto", 0);
2263             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
2264                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2265                         ost->file_index, ost->index);
2266                 ret = AVERROR(EINVAL);
2267                 goto dump_format;
2268             }
2269             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2270                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
2271                 av_buffersink_set_frame_size(ost->filter->filter,
2272                                              ost->st->codec->frame_size);
2273             assert_codec_experimental(ost->st->codec, 1);
2274             assert_avoptions(ost->opts);
2275             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2276                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2277                                              " It takes bits/s as argument, not kbits/s\n");
2278             extra_size += ost->st->codec->extradata_size;
2279
2280             if (ost->st->codec->me_threshold)
2281                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
2282         }
2283     }
2284
2285     /* init input streams */
2286     for (i = 0; i < nb_input_streams; i++)
2287         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
2288             goto dump_format;
2289
2290     /* discard unused programs */
2291     for (i = 0; i < nb_input_files; i++) {
2292         InputFile *ifile = input_files[i];
2293         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2294             AVProgram *p = ifile->ctx->programs[j];
2295             int discard  = AVDISCARD_ALL;
2296
2297             for (k = 0; k < p->nb_stream_indexes; k++)
2298                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
2299                     discard = AVDISCARD_DEFAULT;
2300                     break;
2301                 }
2302             p->discard = discard;
2303         }
2304     }
2305
2306     /* open files and write file headers */
2307     for (i = 0; i < nb_output_files; i++) {
2308         oc = output_files[i]->ctx;
2309         oc->interrupt_callback = int_cb;
2310         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
2311             char errbuf[128];
2312             const char *errbuf_ptr = errbuf;
2313             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
2314                 errbuf_ptr = strerror(AVUNERROR(ret));
2315             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
2316             ret = AVERROR(EINVAL);
2317             goto dump_format;
2318         }
2319 //         assert_avoptions(output_files[i]->opts);
2320         if (strcmp(oc->oformat->name, "rtp")) {
2321             want_sdp = 0;
2322         }
2323     }
2324
2325  dump_format:
2326     /* dump the file output parameters - cannot be done before in case
2327        of stream copy */
2328     for (i = 0; i < nb_output_files; i++) {
2329         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
2330     }
2331
2332     /* dump the stream mapping */
2333     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2334     for (i = 0; i < nb_input_streams; i++) {
2335         ist = input_streams[i];
2336
2337         for (j = 0; j < ist->nb_filters; j++) {
2338             if (ist->filters[j]->graph->graph_desc) {
2339                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
2340                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
2341                        ist->filters[j]->name);
2342                 if (nb_filtergraphs > 1)
2343                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
2344                 av_log(NULL, AV_LOG_INFO, "\n");
2345             }
2346         }
2347     }
2348
2349     for (i = 0; i < nb_output_streams; i++) {
2350         ost = output_streams[i];
2351
2352         if (ost->attachment_filename) {
2353             /* an attached file */
2354             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2355                    ost->attachment_filename, ost->file_index, ost->index);
2356             continue;
2357         }
2358
2359         if (ost->filter && ost->filter->graph->graph_desc) {
2360             /* output from a complex graph */
2361             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
2362             if (nb_filtergraphs > 1)
2363                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
2364
2365             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
2366                    ost->index, ost->enc ? ost->enc->name : "?");
2367             continue;
2368         }
2369
2370         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2371                input_streams[ost->source_index]->file_index,
2372                input_streams[ost->source_index]->st->index,
2373                ost->file_index,
2374                ost->index);
2375         if (ost->sync_ist != input_streams[ost->source_index])
2376             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2377                    ost->sync_ist->file_index,
2378                    ost->sync_ist->st->index);
2379         if (ost->stream_copy)
2380             av_log(NULL, AV_LOG_INFO, " (copy)");
2381         else
2382             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
2383                    input_streams[ost->source_index]->dec->name : "?",
2384                    ost->enc ? ost->enc->name : "?");
2385         av_log(NULL, AV_LOG_INFO, "\n");
2386     }
2387
2388     if (ret) {
2389         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2390         return ret;
2391     }
2392
2393     if (want_sdp) {
2394         print_sdp();
2395     }
2396
2397     return 0;
2398 }
2399
2400 /**
2401  * @return 1 if there are still streams where more output is wanted,
2402  *         0 otherwise
2403  */
2404 static int need_output(void)
2405 {
2406     int i;
2407
2408     for (i = 0; i < nb_output_streams; i++) {
2409         OutputStream *ost    = output_streams[i];
2410         OutputFile *of       = output_files[ost->file_index];
2411         AVFormatContext *os  = output_files[ost->file_index]->ctx;
2412
2413         if (ost->finished ||
2414             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2415             continue;
2416         if (ost->frame_number >= ost->max_frames) {
2417             int j;
2418             for (j = 0; j < of->ctx->nb_streams; j++)
2419                 close_output_stream(output_streams[of->ost_index + j]);
2420             continue;
2421         }
2422
2423         return 1;
2424     }
2425
2426     return 0;
2427 }
2428
2429 /**
2430  * Select the output stream to process.
2431  *
2432  * @return  selected output stream, or NULL if none available
2433  */
2434 static OutputStream *choose_output(void)
2435 {
2436     int i;
2437     int64_t opts_min = INT64_MAX;
2438     OutputStream *ost_min = NULL;
2439
2440     for (i = 0; i < nb_output_streams; i++) {
2441         OutputStream *ost = output_streams[i];
2442         int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
2443                                     AV_TIME_BASE_Q);
2444         if (!ost->unavailable && !ost->finished && opts < opts_min) {
2445             opts_min = opts;
2446             ost_min  = ost;
2447         }
2448     }
2449     return ost_min;
2450 }
2451
2452 static int check_keyboard_interaction(int64_t cur_time)
2453 {
2454     int i, ret, key;
2455     static int64_t last_time;
2456     if (received_nb_signals)
2457         return AVERROR_EXIT;
2458     /* read_key() returns 0 on EOF */
2459     if(cur_time - last_time >= 100000 && !run_as_daemon){
2460         key =  read_key();
2461         last_time = cur_time;
2462     }else
2463         key = -1;
2464     if (key == 'q')
2465         return AVERROR_EXIT;
2466     if (key == '+') av_log_set_level(av_log_get_level()+10);
2467     if (key == '-') av_log_set_level(av_log_get_level()-10);
2468     if (key == 's') qp_hist     ^= 1;
2469     if (key == 'h'){
2470         if (do_hex_dump){
2471             do_hex_dump = do_pkt_dump = 0;
2472         } else if(do_pkt_dump){
2473             do_hex_dump = 1;
2474         } else
2475             do_pkt_dump = 1;
2476         av_log_set_level(AV_LOG_DEBUG);
2477     }
2478     if (key == 'c' || key == 'C'){
2479         char buf[4096], target[64], command[256], arg[256] = {0};
2480         double time;
2481         int k, n = 0;
2482         fprintf(stderr, "\nEnter command: <target> <time> <command>[ <argument>]\n");
2483         i = 0;
2484         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
2485             if (k > 0)
2486                 buf[i++] = k;
2487         buf[i] = 0;
2488         if (k > 0 &&
2489             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
2490             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
2491                    target, time, command, arg);
2492             for (i = 0; i < nb_filtergraphs; i++) {
2493                 FilterGraph *fg = filtergraphs[i];
2494                 if (fg->graph) {
2495                     if (time < 0) {
2496                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
2497                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
2498                         fprintf(stderr, "Command reply for stream %d: ret:%d res:%s\n", i, ret, buf);
2499                     } else {
2500                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
2501                     }
2502                 }
2503             }
2504         } else {
2505             av_log(NULL, AV_LOG_ERROR,
2506                    "Parse error, at least 3 arguments were expected, "
2507                    "only %d given in string '%s'\n", n, buf);
2508         }
2509     }
2510     if (key == 'd' || key == 'D'){
2511         int debug=0;
2512         if(key == 'D') {
2513             debug = input_streams[0]->st->codec->debug<<1;
2514             if(!debug) debug = 1;
2515             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
2516                 debug += debug;
2517         }else
2518             if(scanf("%d", &debug)!=1)
2519                 fprintf(stderr,"error parsing debug value\n");
2520         for(i=0;i<nb_input_streams;i++) {
2521             input_streams[i]->st->codec->debug = debug;
2522         }
2523         for(i=0;i<nb_output_streams;i++) {
2524             OutputStream *ost = output_streams[i];
2525             ost->st->codec->debug = debug;
2526         }
2527         if(debug) av_log_set_level(AV_LOG_DEBUG);
2528         fprintf(stderr,"debug=%d\n", debug);
2529     }
2530     if (key == '?'){
2531         fprintf(stderr, "key    function\n"
2532                         "?      show this help\n"
2533                         "+      increase verbosity\n"
2534                         "-      decrease verbosity\n"
2535                         "c      Send command to filtergraph\n"
2536                         "D      cycle through available debug modes\n"
2537                         "h      dump packets/hex press to cycle through the 3 states\n"
2538                         "q      quit\n"
2539                         "s      Show QP histogram\n"
2540         );
2541     }
2542     return 0;
2543 }
2544
2545 #if HAVE_PTHREADS
2546 static void *input_thread(void *arg)
2547 {
2548     InputFile *f = arg;
2549     int ret = 0;
2550
2551     while (!transcoding_finished && ret >= 0) {
2552         AVPacket pkt;
2553         ret = av_read_frame(f->ctx, &pkt);
2554
2555         if (ret == AVERROR(EAGAIN)) {
2556             av_usleep(10000);
2557             ret = 0;
2558             continue;
2559         } else if (ret < 0)
2560             break;
2561
2562         pthread_mutex_lock(&f->fifo_lock);
2563         while (!av_fifo_space(f->fifo))
2564             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2565
2566         av_dup_packet(&pkt);
2567         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2568
2569         pthread_mutex_unlock(&f->fifo_lock);
2570     }
2571
2572     f->finished = 1;
2573     return NULL;
2574 }
2575
2576 static void free_input_threads(void)
2577 {
2578     int i;
2579
2580     if (nb_input_files == 1)
2581         return;
2582
2583     transcoding_finished = 1;
2584
2585     for (i = 0; i < nb_input_files; i++) {
2586         InputFile *f = input_files[i];
2587         AVPacket pkt;
2588
2589         if (!f->fifo || f->joined)
2590             continue;
2591
2592         pthread_mutex_lock(&f->fifo_lock);
2593         while (av_fifo_size(f->fifo)) {
2594             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2595             av_free_packet(&pkt);
2596         }
2597         pthread_cond_signal(&f->fifo_cond);
2598         pthread_mutex_unlock(&f->fifo_lock);
2599
2600         pthread_join(f->thread, NULL);
2601         f->joined = 1;
2602
2603         while (av_fifo_size(f->fifo)) {
2604             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2605             av_free_packet(&pkt);
2606         }
2607         av_fifo_free(f->fifo);
2608     }
2609 }
2610
2611 static int init_input_threads(void)
2612 {
2613     int i, ret;
2614
2615     if (nb_input_files == 1)
2616         return 0;
2617
2618     for (i = 0; i < nb_input_files; i++) {
2619         InputFile *f = input_files[i];
2620
2621         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2622             return AVERROR(ENOMEM);
2623
2624         pthread_mutex_init(&f->fifo_lock, NULL);
2625         pthread_cond_init (&f->fifo_cond, NULL);
2626
2627         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2628             return AVERROR(ret);
2629     }
2630     return 0;
2631 }
2632
2633 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2634 {
2635     int ret = 0;
2636
2637     pthread_mutex_lock(&f->fifo_lock);
2638
2639     if (av_fifo_size(f->fifo)) {
2640         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2641         pthread_cond_signal(&f->fifo_cond);
2642     } else {
2643         if (f->finished)
2644             ret = AVERROR_EOF;
2645         else
2646             ret = AVERROR(EAGAIN);
2647     }
2648
2649     pthread_mutex_unlock(&f->fifo_lock);
2650
2651     return ret;
2652 }
2653 #endif
2654
2655 static int get_input_packet(InputFile *f, AVPacket *pkt)
2656 {
2657 #if HAVE_PTHREADS
2658     if (nb_input_files > 1)
2659         return get_input_packet_mt(f, pkt);
2660 #endif
2661     return av_read_frame(f->ctx, pkt);
2662 }
2663
2664 static int got_eagain(void)
2665 {
2666     int i;
2667     for (i = 0; i < nb_output_streams; i++)
2668         if (output_streams[i]->unavailable)
2669             return 1;
2670     return 0;
2671 }
2672
2673 static void reset_eagain(void)
2674 {
2675     int i;
2676     for (i = 0; i < nb_input_files; i++)
2677         input_files[i]->eagain = 0;
2678     for (i = 0; i < nb_output_streams; i++)
2679         output_streams[i]->unavailable = 0;
2680 }
2681
2682 /**
2683  * @return
2684  * - 0 -- one packet was read and processed
2685  * - AVERROR(EAGAIN) -- no packets were available for selected file,
2686  *   this function should be called again
2687  * - AVERROR_EOF -- this function should not be called again
2688  */
2689 static int process_input(int file_index)
2690 {
2691     InputFile *ifile = input_files[file_index];
2692     AVFormatContext *is;
2693     InputStream *ist;
2694     AVPacket pkt;
2695     int ret, i, j;
2696
2697     is  = ifile->ctx;
2698     ret = get_input_packet(ifile, &pkt);
2699
2700     if (ret == AVERROR(EAGAIN)) {
2701         ifile->eagain = 1;
2702         return ret;
2703     }
2704     if (ret < 0) {
2705         if (ret != AVERROR_EOF) {
2706             print_error(is->filename, ret);
2707             if (exit_on_error)
2708                 exit_program(1);
2709         }
2710         ifile->eof_reached = 1;
2711
2712         for (i = 0; i < ifile->nb_streams; i++) {
2713             ist = input_streams[ifile->ist_index + i];
2714             if (ist->decoding_needed)
2715                 output_packet(ist, NULL);
2716
2717             /* mark all outputs that don't go through lavfi as finished */
2718             for (j = 0; j < nb_output_streams; j++) {
2719                 OutputStream *ost = output_streams[j];
2720
2721                 if (ost->source_index == ifile->ist_index + i &&
2722                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
2723                     close_output_stream(ost);
2724             }
2725         }
2726
2727         return AVERROR(EAGAIN);
2728     }
2729
2730     reset_eagain();
2731
2732     if (do_pkt_dump) {
2733         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2734                          is->streams[pkt.stream_index]);
2735     }
2736     /* the following test is needed in case new streams appear
2737        dynamically in stream : we ignore them */
2738     if (pkt.stream_index >= ifile->nb_streams) {
2739         report_new_stream(file_index, &pkt);
2740         goto discard_packet;
2741     }
2742
2743     ist = input_streams[ifile->ist_index + pkt.stream_index];
2744     if (ist->discard)
2745         goto discard_packet;
2746
2747     if(!ist->wrap_correction_done && input_files[file_index]->ctx->start_time != AV_NOPTS_VALUE && ist->st->pts_wrap_bits < 64){
2748         int64_t stime = av_rescale_q(input_files[file_index]->ctx->start_time, AV_TIME_BASE_Q, ist->st->time_base);
2749         int64_t stime2= stime + (1ULL<<ist->st->pts_wrap_bits);
2750         ist->wrap_correction_done = 1;
2751
2752         if(stime2 > stime && pkt.dts != AV_NOPTS_VALUE && pkt.dts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
2753             pkt.dts -= 1ULL<<ist->st->pts_wrap_bits;
2754             ist->wrap_correction_done = 0;
2755         }
2756         if(stime2 > stime && pkt.pts != AV_NOPTS_VALUE && pkt.pts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
2757             pkt.pts -= 1ULL<<ist->st->pts_wrap_bits;
2758             ist->wrap_correction_done = 0;
2759         }
2760     }
2761
2762     if (pkt.dts != AV_NOPTS_VALUE)
2763         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2764     if (pkt.pts != AV_NOPTS_VALUE)
2765         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2766
2767     if (pkt.pts != AV_NOPTS_VALUE)
2768         pkt.pts *= ist->ts_scale;
2769     if (pkt.dts != AV_NOPTS_VALUE)
2770         pkt.dts *= ist->ts_scale;
2771
2772     if (debug_ts) {
2773         av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
2774                 "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:%"PRId64"\n",
2775                 ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->st->codec->codec_type),
2776                 av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &AV_TIME_BASE_Q),
2777                 av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &AV_TIME_BASE_Q),
2778                 av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
2779                 av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
2780                 input_files[ist->file_index]->ts_offset);
2781     }
2782
2783     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
2784         !copy_ts) {
2785         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2786         int64_t delta   = pkt_dts - ist->next_dts;
2787         if (is->iformat->flags & AVFMT_TS_DISCONT) {
2788         if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
2789             (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
2790                 ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
2791             pkt_dts+1<ist->pts){
2792             ifile->ts_offset -= delta;
2793             av_log(NULL, AV_LOG_DEBUG,
2794                    "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2795                    delta, ifile->ts_offset);
2796             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2797             if (pkt.pts != AV_NOPTS_VALUE)
2798                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2799         }
2800         } else {
2801             if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
2802                 (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
2803                ) {
2804                 av_log(NULL, AV_LOG_WARNING, "DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n", pkt.dts, ist->next_dts, pkt.stream_index);
2805                 pkt.dts = AV_NOPTS_VALUE;
2806             }
2807             if (pkt.pts != AV_NOPTS_VALUE){
2808                 int64_t pkt_pts = av_rescale_q(pkt.pts, ist->st->time_base, AV_TIME_BASE_Q);
2809                 delta   = pkt_pts - ist->next_dts;
2810                 if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
2811                     (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
2812                    ) {
2813                     av_log(NULL, AV_LOG_WARNING, "PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n", pkt.pts, ist->next_dts, pkt.stream_index);
2814                     pkt.pts = AV_NOPTS_VALUE;
2815                 }
2816             }
2817         }
2818     }
2819
2820     sub2video_heartbeat(ist, pkt.pts);
2821
2822     ret = output_packet(ist, &pkt);
2823     if (ret < 0) {
2824         char buf[128];
2825         av_strerror(ret, buf, sizeof(buf));
2826         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d: %s\n",
2827                 ist->file_index, ist->st->index, buf);
2828         if (exit_on_error)
2829             exit_program(1);
2830     }
2831
2832 discard_packet:
2833     av_free_packet(&pkt);
2834
2835     return 0;
2836 }
2837
2838 /**
2839  * Perform a step of transcoding for the specified filter graph.
2840  *
2841  * @param[in]  graph     filter graph to consider
2842  * @param[out] best_ist  input stream where a frame would allow to continue
2843  * @return  0 for success, <0 for error
2844  */
2845 static int transcode_from_filter(FilterGraph *graph, InputStream **best_ist)
2846 {
2847     int i, ret;
2848     int nb_requests, nb_requests_max = 0;
2849     InputFilter *ifilter;
2850     InputStream *ist;
2851
2852     *best_ist = NULL;
2853     ret = avfilter_graph_request_oldest(graph->graph);
2854     if (ret >= 0)
2855         return reap_filters();
2856
2857     if (ret == AVERROR_EOF) {
2858         ret = reap_filters();
2859         for (i = 0; i < graph->nb_outputs; i++)
2860             close_output_stream(graph->outputs[i]->ost);
2861         return ret;
2862     }
2863     if (ret != AVERROR(EAGAIN))
2864         return ret;
2865
2866     for (i = 0; i < graph->nb_inputs; i++) {
2867         ifilter = graph->inputs[i];
2868         ist = ifilter->ist;
2869         if (input_files[ist->file_index]->eagain ||
2870             input_files[ist->file_index]->eof_reached)
2871             continue;
2872         nb_requests = av_buffersrc_get_nb_failed_requests(ifilter->filter);
2873         if (nb_requests > nb_requests_max) {
2874             nb_requests_max = nb_requests;
2875             *best_ist = ist;
2876         }
2877     }
2878
2879     if (!*best_ist)
2880         for (i = 0; i < graph->nb_outputs; i++)
2881             graph->outputs[i]->ost->unavailable = 1;
2882
2883     return 0;
2884 }
2885
2886 /**
2887  * Run a single step of transcoding.
2888  *
2889  * @return  0 for success, <0 for error
2890  */
2891 static int transcode_step(void)
2892 {
2893     OutputStream *ost;
2894     InputStream  *ist;
2895     int ret;
2896
2897     ost = choose_output();
2898     if (!ost) {
2899         if (got_eagain()) {
2900             reset_eagain();
2901             av_usleep(10000);
2902             return 0;
2903         }
2904         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
2905         return AVERROR_EOF;
2906     }
2907
2908     if (ost->filter) {
2909         if ((ret = transcode_from_filter(ost->filter->graph, &ist)) < 0)
2910             return ret;
2911         if (!ist)
2912             return 0;
2913     } else {
2914         av_assert0(ost->source_index >= 0);
2915         ist = input_streams[ost->source_index];
2916     }
2917
2918     ret = process_input(ist->file_index);
2919     if (ret == AVERROR(EAGAIN)) {
2920         if (input_files[ist->file_index]->eagain)
2921             ost->unavailable = 1;
2922         return 0;
2923     }
2924     if (ret < 0)
2925         return ret == AVERROR_EOF ? 0 : ret;
2926
2927     return reap_filters();
2928 }
2929
2930 /*
2931  * The following code is the main loop of the file converter
2932  */
2933 static int transcode(void)
2934 {
2935     int ret, i;
2936     AVFormatContext *os;
2937     OutputStream *ost;
2938     InputStream *ist;
2939     int64_t timer_start;
2940
2941     ret = transcode_init();
2942     if (ret < 0)
2943         goto fail;
2944
2945     if (stdin_interaction) {
2946         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
2947     }
2948
2949     timer_start = av_gettime();
2950
2951 #if HAVE_PTHREADS
2952     if ((ret = init_input_threads()) < 0)
2953         goto fail;
2954 #endif
2955
2956     while (!received_sigterm) {
2957         int64_t cur_time= av_gettime();
2958
2959         /* if 'q' pressed, exits */
2960         if (stdin_interaction)
2961             if (check_keyboard_interaction(cur_time) < 0)
2962                 break;
2963
2964         /* check if there's any stream where output is still needed */
2965         if (!need_output()) {
2966             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2967             break;
2968         }
2969
2970         ret = transcode_step();
2971         if (ret < 0) {
2972             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
2973                 continue;
2974
2975             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
2976             break;
2977         }
2978
2979         /* dump report by using the output first video and audio streams */
2980         print_report(0, timer_start, cur_time);
2981     }
2982 #if HAVE_PTHREADS
2983     free_input_threads();
2984 #endif
2985
2986     /* at the end of stream, we must flush the decoder buffers */
2987     for (i = 0; i < nb_input_streams; i++) {
2988         ist = input_streams[i];
2989         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
2990             output_packet(ist, NULL);
2991         }
2992     }
2993     flush_encoders();
2994
2995     term_exit();
2996
2997     /* write the trailer if needed and close file */
2998     for (i = 0; i < nb_output_files; i++) {
2999         os = output_files[i]->ctx;
3000         av_write_trailer(os);
3001     }
3002
3003     /* dump report by using the first video and audio streams */
3004     print_report(1, timer_start, av_gettime());
3005
3006     /* close each encoder */
3007     for (i = 0; i < nb_output_streams; i++) {
3008         ost = output_streams[i];
3009         if (ost->encoding_needed) {
3010             av_freep(&ost->st->codec->stats_in);
3011             avcodec_close(ost->st->codec);
3012         }
3013     }
3014
3015     /* close each decoder */
3016     for (i = 0; i < nb_input_streams; i++) {
3017         ist = input_streams[i];
3018         if (ist->decoding_needed) {
3019             avcodec_close(ist->st->codec);
3020         }
3021     }
3022
3023     /* finished ! */
3024     ret = 0;
3025
3026  fail:
3027 #if HAVE_PTHREADS
3028     free_input_threads();
3029 #endif
3030
3031     if (output_streams) {
3032         for (i = 0; i < nb_output_streams; i++) {
3033             ost = output_streams[i];
3034             if (ost) {
3035                 if (ost->stream_copy)
3036                     av_freep(&ost->st->codec->extradata);
3037                 if (ost->logfile) {
3038                     fclose(ost->logfile);
3039                     ost->logfile = NULL;
3040                 }
3041                 av_freep(&ost->st->codec->subtitle_header);
3042                 av_free(ost->forced_kf_pts);
3043                 av_dict_free(&ost->opts);
3044             }
3045         }
3046     }
3047     return ret;
3048 }
3049
3050
3051 static int64_t getutime(void)
3052 {
3053 #if HAVE_GETRUSAGE
3054     struct rusage rusage;
3055
3056     getrusage(RUSAGE_SELF, &rusage);
3057     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
3058 #elif HAVE_GETPROCESSTIMES
3059     HANDLE proc;
3060     FILETIME c, e, k, u;
3061     proc = GetCurrentProcess();
3062     GetProcessTimes(proc, &c, &e, &k, &u);
3063     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
3064 #else
3065     return av_gettime();
3066 #endif
3067 }
3068
3069 static int64_t getmaxrss(void)
3070 {
3071 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
3072     struct rusage rusage;
3073     getrusage(RUSAGE_SELF, &rusage);
3074     return (int64_t)rusage.ru_maxrss * 1024;
3075 #elif HAVE_GETPROCESSMEMORYINFO
3076     HANDLE proc;
3077     PROCESS_MEMORY_COUNTERS memcounters;
3078     proc = GetCurrentProcess();
3079     memcounters.cb = sizeof(memcounters);
3080     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
3081     return memcounters.PeakPagefileUsage;
3082 #else
3083     return 0;
3084 #endif
3085 }
3086
3087 static void log_callback_null(void *ptr, int level, const char *fmt, va_list vl)
3088 {
3089 }
3090
3091 static void parse_cpuflags(int argc, char **argv, const OptionDef *options)
3092 {
3093     int idx = locate_option(argc, argv, options, "cpuflags");
3094     if (idx && argv[idx + 1])
3095         opt_cpuflags(NULL, "cpuflags", argv[idx + 1]);
3096 }
3097
3098 int main(int argc, char **argv)
3099 {
3100     OptionsContext o = { 0 };
3101     int64_t ti;
3102
3103     reset_options(&o, 0);
3104
3105     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3106     parse_loglevel(argc, argv, options);
3107
3108     if(argc>1 && !strcmp(argv[1], "-d")){
3109         run_as_daemon=1;
3110         av_log_set_callback(log_callback_null);
3111         argc--;
3112         argv++;
3113     }
3114
3115     avcodec_register_all();
3116 #if CONFIG_AVDEVICE
3117     avdevice_register_all();
3118 #endif
3119     avfilter_register_all();
3120     av_register_all();
3121     avformat_network_init();
3122
3123     show_banner(argc, argv, options);
3124
3125     term_init();
3126
3127     parse_cpuflags(argc, argv, options);
3128
3129     /* parse options */
3130     parse_options(&o, argc, argv, options, opt_output_file);
3131
3132     if (nb_output_files <= 0 && nb_input_files == 0) {
3133         show_usage();
3134         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3135         exit_program(1);
3136     }
3137
3138     /* file converter / grab */
3139     if (nb_output_files <= 0) {
3140         av_log(NULL, AV_LOG_FATAL, "At least one output file must be specified\n");
3141         exit_program(1);
3142     }
3143
3144 //     if (nb_input_files == 0) {
3145 //         av_log(NULL, AV_LOG_FATAL, "At least one input file must be specified\n");
3146 //         exit_program(1);
3147 //     }
3148
3149     current_time = ti = getutime();
3150     if (transcode() < 0)
3151         exit_program(1);
3152     ti = getutime() - ti;
3153     if (do_benchmark) {
3154         int maxrss = getmaxrss() / 1024;
3155         printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
3156     }
3157
3158     exit_program(0);
3159     return 0;
3160 }