mp3dec: fix seeking without xing TOC
[ffmpeg.git] / ffmpeg.c
1 /*
2  * Copyright (c) 2000-2003 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 /**
22  * @file
23  * multimedia converter based on the FFmpeg libraries
24  */
25
26 #include "config.h"
27 #include <ctype.h>
28 #include <string.h>
29 #include <math.h>
30 #include <stdlib.h>
31 #include <errno.h>
32 #include <limits.h>
33 #if HAVE_ISATTY
34 #if HAVE_IO_H
35 #include <io.h>
36 #endif
37 #if HAVE_UNISTD_H
38 #include <unistd.h>
39 #endif
40 #endif
41 #include "libavformat/avformat.h"
42 #include "libavdevice/avdevice.h"
43 #include "libswscale/swscale.h"
44 #include "libswresample/swresample.h"
45 #include "libavutil/opt.h"
46 #include "libavutil/audioconvert.h"
47 #include "libavutil/parseutils.h"
48 #include "libavutil/samplefmt.h"
49 #include "libavutil/colorspace.h"
50 #include "libavutil/fifo.h"
51 #include "libavutil/intreadwrite.h"
52 #include "libavutil/dict.h"
53 #include "libavutil/mathematics.h"
54 #include "libavutil/pixdesc.h"
55 #include "libavutil/avstring.h"
56 #include "libavutil/libm.h"
57 #include "libavutil/imgutils.h"
58 #include "libavutil/timestamp.h"
59 #include "libavutil/bprint.h"
60 #include "libavutil/time.h"
61 #include "libavformat/os_support.h"
62
63 #include "libavformat/ffm.h" // not public API
64
65 # include "libavfilter/avcodec.h"
66 # include "libavfilter/avfilter.h"
67 # include "libavfilter/avfiltergraph.h"
68 # include "libavfilter/buffersrc.h"
69 # include "libavfilter/buffersink.h"
70
71 #if HAVE_SYS_RESOURCE_H
72 #include <sys/types.h>
73 #include <sys/resource.h>
74 #elif HAVE_GETPROCESSTIMES
75 #include <windows.h>
76 #endif
77 #if HAVE_GETPROCESSMEMORYINFO
78 #include <windows.h>
79 #include <psapi.h>
80 #endif
81
82 #if HAVE_SYS_SELECT_H
83 #include <sys/select.h>
84 #endif
85
86 #if HAVE_TERMIOS_H
87 #include <fcntl.h>
88 #include <sys/ioctl.h>
89 #include <sys/time.h>
90 #include <termios.h>
91 #elif HAVE_KBHIT
92 #include <conio.h>
93 #endif
94
95 #if HAVE_PTHREADS
96 #include <pthread.h>
97 #endif
98
99 #include <time.h>
100
101 #include "ffmpeg.h"
102 #include "cmdutils.h"
103
104 #include "libavutil/avassert.h"
105
106 const char program_name[] = "ffmpeg";
107 const int program_birth_year = 2000;
108
109 static FILE *vstats_file;
110
111 static void do_video_stats(AVFormatContext *os, OutputStream *ost, int frame_size);
112 static int64_t getutime(void);
113
114 static int run_as_daemon  = 0;
115 static int64_t video_size = 0;
116 static int64_t audio_size = 0;
117 static int64_t subtitle_size = 0;
118 static int64_t extra_size = 0;
119 static int nb_frames_dup = 0;
120 static int nb_frames_drop = 0;
121
122 static int current_time;
123 AVIOContext *progress_avio = NULL;
124
125 static uint8_t *subtitle_out;
126
127 #if HAVE_PTHREADS
128 /* signal to input threads that they should exit; set by the main thread */
129 static int transcoding_finished;
130 #endif
131
132 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
133
134 InputStream **input_streams = NULL;
135 int        nb_input_streams = 0;
136 InputFile   **input_files   = NULL;
137 int        nb_input_files   = 0;
138
139 OutputStream **output_streams = NULL;
140 int         nb_output_streams = 0;
141 OutputFile   **output_files   = NULL;
142 int         nb_output_files   = 0;
143
144 FilterGraph **filtergraphs;
145 int        nb_filtergraphs;
146
147 #if HAVE_TERMIOS_H
148
149 /* init terminal so that we can grab keys */
150 static struct termios oldtty;
151 static int restore_tty;
152 #endif
153
154
155 /* sub2video hack:
156    Convert subtitles to video with alpha to insert them in filter graphs.
157    This is a temporary solution until libavfilter gets real subtitles support.
158  */
159
160
161
162 static void sub2video_copy_rect(uint8_t *dst, int dst_linesize, int w, int h,
163                                 AVSubtitleRect *r)
164 {
165     uint32_t *pal, *dst2;
166     uint8_t *src, *src2;
167     int x, y;
168
169     if (r->type != SUBTITLE_BITMAP) {
170         av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n");
171         return;
172     }
173     if (r->x < 0 || r->x + r->w > w || r->y < 0 || r->y + r->h > h) {
174         av_log(NULL, AV_LOG_WARNING, "sub2video: rectangle overflowing\n");
175         return;
176     }
177
178     dst += r->y * dst_linesize + r->x * 4;
179     src = r->pict.data[0];
180     pal = (uint32_t *)r->pict.data[1];
181     for (y = 0; y < r->h; y++) {
182         dst2 = (uint32_t *)dst;
183         src2 = src;
184         for (x = 0; x < r->w; x++)
185             *(dst2++) = pal[*(src2++)];
186         dst += dst_linesize;
187         src += r->pict.linesize[0];
188     }
189 }
190
191 static void sub2video_push_ref(InputStream *ist, int64_t pts)
192 {
193     AVFilterBufferRef *ref = ist->sub2video.ref;
194     int i;
195
196     ist->sub2video.last_pts = ref->pts = pts;
197     for (i = 0; i < ist->nb_filters; i++)
198         av_buffersrc_add_ref(ist->filters[i]->filter,
199                              avfilter_ref_buffer(ref, ~0),
200                              AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT |
201                              AV_BUFFERSRC_FLAG_NO_COPY |
202                              AV_BUFFERSRC_FLAG_PUSH);
203 }
204
205 static void sub2video_update(InputStream *ist, AVSubtitle *sub)
206 {
207     int w = ist->sub2video.w, h = ist->sub2video.h;
208     AVFilterBufferRef *ref = ist->sub2video.ref;
209     int8_t *dst;
210     int     dst_linesize;
211     int i;
212     int64_t pts = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ist->st->time_base);
213
214     if (!ref)
215         return;
216     dst          = ref->data    [0];
217     dst_linesize = ref->linesize[0];
218     memset(dst, 0, h * dst_linesize);
219     for (i = 0; i < sub->num_rects; i++)
220         sub2video_copy_rect(dst, dst_linesize, w, h, sub->rects[i]);
221     sub2video_push_ref(ist, pts);
222 }
223
224 static void sub2video_heartbeat(InputStream *ist, int64_t pts)
225 {
226     InputFile *infile = input_files[ist->file_index];
227     int i, j, nb_reqs;
228     int64_t pts2;
229
230     /* When a frame is read from a file, examine all sub2video streams in
231        the same file and send the sub2video frame again. Otherwise, decoded
232        video frames could be accumulating in the filter graph while a filter
233        (possibly overlay) is desperately waiting for a subtitle frame. */
234     for (i = 0; i < infile->nb_streams; i++) {
235         InputStream *ist2 = input_streams[infile->ist_index + i];
236         if (!ist2->sub2video.ref)
237             continue;
238         /* subtitles seem to be usually muxed ahead of other streams;
239            if not, substracting a larger time here is necessary */
240         pts2 = av_rescale_q(pts, ist->st->time_base, ist2->st->time_base) - 1;
241         /* do not send the heartbeat frame if the subtitle is already ahead */
242         if (pts2 <= ist2->sub2video.last_pts)
243             continue;
244         for (j = 0, nb_reqs = 0; j < ist2->nb_filters; j++)
245             nb_reqs += av_buffersrc_get_nb_failed_requests(ist2->filters[j]->filter);
246         if (nb_reqs)
247             sub2video_push_ref(ist2, pts2);
248     }
249 }
250
251 static void sub2video_flush(InputStream *ist)
252 {
253     int i;
254
255     for (i = 0; i < ist->nb_filters; i++)
256         av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
257 }
258
259 /* end of sub2video hack */
260
261 void term_exit(void)
262 {
263     av_log(NULL, AV_LOG_QUIET, "%s", "");
264 #if HAVE_TERMIOS_H
265     if(restore_tty)
266         tcsetattr (0, TCSANOW, &oldtty);
267 #endif
268 }
269
270 static volatile int received_sigterm = 0;
271 static volatile int received_nb_signals = 0;
272
273 static void
274 sigterm_handler(int sig)
275 {
276     received_sigterm = sig;
277     received_nb_signals++;
278     term_exit();
279     if(received_nb_signals > 3)
280         exit(123);
281 }
282
283 void term_init(void)
284 {
285 #if HAVE_TERMIOS_H
286     if(!run_as_daemon){
287         struct termios tty;
288         int istty = 1;
289 #if HAVE_ISATTY
290         istty = isatty(0) && isatty(2);
291 #endif
292         if (istty && tcgetattr (0, &tty) == 0) {
293             oldtty = tty;
294             restore_tty = 1;
295             atexit(term_exit);
296
297             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
298                              |INLCR|IGNCR|ICRNL|IXON);
299             tty.c_oflag |= OPOST;
300             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
301             tty.c_cflag &= ~(CSIZE|PARENB);
302             tty.c_cflag |= CS8;
303             tty.c_cc[VMIN] = 1;
304             tty.c_cc[VTIME] = 0;
305
306             tcsetattr (0, TCSANOW, &tty);
307         }
308         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
309     }
310 #endif
311     avformat_network_deinit();
312
313     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
314     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
315 #ifdef SIGXCPU
316     signal(SIGXCPU, sigterm_handler);
317 #endif
318 }
319
320 /* read a key without blocking */
321 static int read_key(void)
322 {
323     unsigned char ch;
324 #if HAVE_TERMIOS_H
325     int n = 1;
326     struct timeval tv;
327     fd_set rfds;
328
329     FD_ZERO(&rfds);
330     FD_SET(0, &rfds);
331     tv.tv_sec = 0;
332     tv.tv_usec = 0;
333     n = select(1, &rfds, NULL, NULL, &tv);
334     if (n > 0) {
335         n = read(0, &ch, 1);
336         if (n == 1)
337             return ch;
338
339         return n;
340     }
341 #elif HAVE_KBHIT
342 #    if HAVE_PEEKNAMEDPIPE
343     static int is_pipe;
344     static HANDLE input_handle;
345     DWORD dw, nchars;
346     if(!input_handle){
347         input_handle = GetStdHandle(STD_INPUT_HANDLE);
348         is_pipe = !GetConsoleMode(input_handle, &dw);
349     }
350
351     if (stdin->_cnt > 0) {
352         read(0, &ch, 1);
353         return ch;
354     }
355     if (is_pipe) {
356         /* When running under a GUI, you will end here. */
357         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL))
358             return -1;
359         //Read it
360         if(nchars != 0) {
361             read(0, &ch, 1);
362             return ch;
363         }else{
364             return -1;
365         }
366     }
367 #    endif
368     if(kbhit())
369         return(getch());
370 #endif
371     return -1;
372 }
373
374 static int decode_interrupt_cb(void *ctx)
375 {
376     return received_nb_signals > 1;
377 }
378
379 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
380
381 void av_noreturn exit_program(int ret)
382 {
383     int i, j;
384
385     for (i = 0; i < nb_filtergraphs; i++) {
386         avfilter_graph_free(&filtergraphs[i]->graph);
387         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
388             av_freep(&filtergraphs[i]->inputs[j]->name);
389             av_freep(&filtergraphs[i]->inputs[j]);
390         }
391         av_freep(&filtergraphs[i]->inputs);
392         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
393             av_freep(&filtergraphs[i]->outputs[j]->name);
394             av_freep(&filtergraphs[i]->outputs[j]);
395         }
396         av_freep(&filtergraphs[i]->outputs);
397         av_freep(&filtergraphs[i]);
398     }
399     av_freep(&filtergraphs);
400
401     av_freep(&subtitle_out);
402
403     /* close files */
404     for (i = 0; i < nb_output_files; i++) {
405         AVFormatContext *s = output_files[i]->ctx;
406         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
407             avio_close(s->pb);
408         avformat_free_context(s);
409         av_dict_free(&output_files[i]->opts);
410         av_freep(&output_files[i]);
411     }
412     for (i = 0; i < nb_output_streams; i++) {
413         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
414         while (bsfc) {
415             AVBitStreamFilterContext *next = bsfc->next;
416             av_bitstream_filter_close(bsfc);
417             bsfc = next;
418         }
419         output_streams[i]->bitstream_filters = NULL;
420
421         av_freep(&output_streams[i]->forced_keyframes);
422         av_freep(&output_streams[i]->avfilter);
423         av_freep(&output_streams[i]->logfile_prefix);
424         av_freep(&output_streams[i]->filtered_frame);
425         av_freep(&output_streams[i]);
426     }
427     for (i = 0; i < nb_input_files; i++) {
428         avformat_close_input(&input_files[i]->ctx);
429         av_freep(&input_files[i]);
430     }
431     for (i = 0; i < nb_input_streams; i++) {
432         av_freep(&input_streams[i]->decoded_frame);
433         av_dict_free(&input_streams[i]->opts);
434         free_buffer_pool(&input_streams[i]->buffer_pool);
435         avfilter_unref_bufferp(&input_streams[i]->sub2video.ref);
436         av_freep(&input_streams[i]->filters);
437         av_freep(&input_streams[i]);
438     }
439
440     if (vstats_file)
441         fclose(vstats_file);
442     av_free(vstats_filename);
443
444     av_freep(&input_streams);
445     av_freep(&input_files);
446     av_freep(&output_streams);
447     av_freep(&output_files);
448
449     uninit_opts();
450
451     avfilter_uninit();
452     avformat_network_deinit();
453
454     if (received_sigterm) {
455         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
456                (int) received_sigterm);
457         exit (255);
458     }
459
460     exit(ret);
461 }
462
463 void assert_avoptions(AVDictionary *m)
464 {
465     AVDictionaryEntry *t;
466     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
467         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
468         exit_program(1);
469     }
470 }
471
472 static void assert_codec_experimental(AVCodecContext *c, int encoder)
473 {
474     const char *codec_string = encoder ? "encoder" : "decoder";
475     AVCodec *codec;
476     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
477         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
478         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
479                 "results.\nAdd '-strict experimental' if you want to use it.\n",
480                 codec_string, c->codec->name);
481         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
482         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
483             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
484                    codec_string, codec->name);
485         exit_program(1);
486     }
487 }
488
489 static void update_benchmark(const char *fmt, ...)
490 {
491     if (do_benchmark_all) {
492         int64_t t = getutime();
493         va_list va;
494         char buf[1024];
495
496         if (fmt) {
497             va_start(va, fmt);
498             vsnprintf(buf, sizeof(buf), fmt, va);
499             va_end(va);
500             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
501         }
502         current_time = t;
503     }
504 }
505
506 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
507 {
508     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
509     AVCodecContext          *avctx = ost->st->codec;
510     int ret;
511
512     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
513         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
514         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
515
516     if ((avctx->codec_type == AVMEDIA_TYPE_AUDIO || avctx->codec_type == AVMEDIA_TYPE_VIDEO) && pkt->dts != AV_NOPTS_VALUE) {
517         int64_t max = ost->st->cur_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
518         if (ost->st->cur_dts && ost->st->cur_dts != AV_NOPTS_VALUE &&  max > pkt->dts) {
519             av_log(s, max - pkt->dts > 2 || avctx->codec_type == AVMEDIA_TYPE_VIDEO ? AV_LOG_WARNING : AV_LOG_DEBUG,
520                    "st:%d PTS: %"PRId64" DTS: %"PRId64" < %"PRId64" invalid, clipping\n", pkt->stream_index, pkt->pts, pkt->dts, max);
521             if(pkt->pts >= pkt->dts)
522                 pkt->pts = FFMAX(pkt->pts, max);
523             pkt->dts = max;
524         }
525     }
526
527     /*
528      * Audio encoders may split the packets --  #frames in != #packets out.
529      * But there is no reordering, so we can limit the number of output packets
530      * by simply dropping them here.
531      * Counting encoded video frames needs to be done separately because of
532      * reordering, see do_video_out()
533      */
534     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
535         if (ost->frame_number >= ost->max_frames) {
536             av_free_packet(pkt);
537             return;
538         }
539         ost->frame_number++;
540     }
541
542     while (bsfc) {
543         AVPacket new_pkt = *pkt;
544         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
545                                            &new_pkt.data, &new_pkt.size,
546                                            pkt->data, pkt->size,
547                                            pkt->flags & AV_PKT_FLAG_KEY);
548         if(a == 0 && new_pkt.data != pkt->data && new_pkt.destruct) {
549             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
550             if(t) {
551                 memcpy(t, new_pkt.data, new_pkt.size);
552                 memset(t + new_pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
553                 new_pkt.data = t;
554                 a = 1;
555             } else
556                 a = AVERROR(ENOMEM);
557         }
558         if (a > 0) {
559             av_free_packet(pkt);
560             new_pkt.destruct = av_destruct_packet;
561         } else if (a < 0) {
562             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
563                    bsfc->filter->name, pkt->stream_index,
564                    avctx->codec ? avctx->codec->name : "copy");
565             print_error("", a);
566             if (exit_on_error)
567                 exit_program(1);
568         }
569         *pkt = new_pkt;
570
571         bsfc = bsfc->next;
572     }
573
574     pkt->stream_index = ost->index;
575     ret = av_interleaved_write_frame(s, pkt);
576     if (ret < 0) {
577         print_error("av_interleaved_write_frame()", ret);
578         exit_program(1);
579     }
580 }
581
582 static void close_output_stream(OutputStream *ost)
583 {
584     OutputFile *of = output_files[ost->file_index];
585
586     ost->finished = 1;
587     if (of->shortest) {
588         int i;
589         for (i = 0; i < of->ctx->nb_streams; i++)
590             output_streams[of->ost_index + i]->finished = 1;
591     }
592 }
593
594 static int check_recording_time(OutputStream *ost)
595 {
596     OutputFile *of = output_files[ost->file_index];
597
598     if (of->recording_time != INT64_MAX &&
599         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
600                       AV_TIME_BASE_Q) >= 0) {
601         close_output_stream(ost);
602         return 0;
603     }
604     return 1;
605 }
606
607 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
608                          AVFrame *frame)
609 {
610     AVCodecContext *enc = ost->st->codec;
611     AVPacket pkt;
612     int got_packet = 0;
613
614     av_init_packet(&pkt);
615     pkt.data = NULL;
616     pkt.size = 0;
617
618     if (!check_recording_time(ost))
619         return;
620
621     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
622         frame->pts = ost->sync_opts;
623     ost->sync_opts = frame->pts + frame->nb_samples;
624
625     av_assert0(pkt.size || !pkt.data);
626     update_benchmark(NULL);
627     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
628         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
629         exit_program(1);
630     }
631     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
632
633     if (got_packet) {
634         if (pkt.pts != AV_NOPTS_VALUE)
635             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
636         if (pkt.dts != AV_NOPTS_VALUE)
637             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
638         if (pkt.duration > 0)
639             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
640
641         if (debug_ts) {
642             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
643                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
644                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
645                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
646         }
647
648         audio_size += pkt.size;
649         write_frame(s, &pkt, ost);
650
651         av_free_packet(&pkt);
652     }
653 }
654
655 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
656 {
657     AVCodecContext *dec;
658     AVPicture *picture2;
659     AVPicture picture_tmp;
660     uint8_t *buf = 0;
661
662     dec = ist->st->codec;
663
664     /* deinterlace : must be done before any resize */
665     if (do_deinterlace) {
666         int size;
667
668         /* create temporary picture */
669         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
670         buf  = av_malloc(size);
671         if (!buf)
672             return;
673
674         picture2 = &picture_tmp;
675         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
676
677         if (avpicture_deinterlace(picture2, picture,
678                                  dec->pix_fmt, dec->width, dec->height) < 0) {
679             /* if error, do not deinterlace */
680             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
681             av_free(buf);
682             buf = NULL;
683             picture2 = picture;
684         }
685     } else {
686         picture2 = picture;
687     }
688
689     if (picture != picture2)
690         *picture = *picture2;
691     *bufp = buf;
692 }
693
694 static void do_subtitle_out(AVFormatContext *s,
695                             OutputStream *ost,
696                             InputStream *ist,
697                             AVSubtitle *sub)
698 {
699     int subtitle_out_max_size = 1024 * 1024;
700     int subtitle_out_size, nb, i;
701     AVCodecContext *enc;
702     AVPacket pkt;
703     int64_t pts;
704
705     if (sub->pts == AV_NOPTS_VALUE) {
706         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
707         if (exit_on_error)
708             exit_program(1);
709         return;
710     }
711
712     enc = ost->st->codec;
713
714     if (!subtitle_out) {
715         subtitle_out = av_malloc(subtitle_out_max_size);
716     }
717
718     /* Note: DVB subtitle need one packet to draw them and one other
719        packet to clear them */
720     /* XXX: signal it in the codec context ? */
721     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
722         nb = 2;
723     else
724         nb = 1;
725
726     /* shift timestamp to honor -ss and make check_recording_time() work with -t */
727     pts = sub->pts - output_files[ost->file_index]->start_time;
728     for (i = 0; i < nb; i++) {
729         ost->sync_opts = av_rescale_q(pts, AV_TIME_BASE_Q, enc->time_base);
730         if (!check_recording_time(ost))
731             return;
732
733         sub->pts = pts;
734         // start_display_time is required to be 0
735         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
736         sub->end_display_time  -= sub->start_display_time;
737         sub->start_display_time = 0;
738         if (i == 1)
739             sub->num_rects = 0;
740         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
741                                                     subtitle_out_max_size, sub);
742         if (subtitle_out_size < 0) {
743             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
744             exit_program(1);
745         }
746
747         av_init_packet(&pkt);
748         pkt.data = subtitle_out;
749         pkt.size = subtitle_out_size;
750         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
751         pkt.duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->st->time_base);
752         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
753             /* XXX: the pts correction is handled here. Maybe handling
754                it in the codec would be better */
755             if (i == 0)
756                 pkt.pts += 90 * sub->start_display_time;
757             else
758                 pkt.pts += 90 * sub->end_display_time;
759         }
760         subtitle_size += pkt.size;
761         write_frame(s, &pkt, ost);
762     }
763 }
764
765 static void do_video_out(AVFormatContext *s,
766                          OutputStream *ost,
767                          AVFrame *in_picture,
768                          float quality)
769 {
770     int ret, format_video_sync;
771     AVPacket pkt;
772     AVCodecContext *enc = ost->st->codec;
773     int nb_frames, i;
774     double sync_ipts, delta;
775     double duration = 0;
776     int frame_size = 0;
777     InputStream *ist = NULL;
778
779     if (ost->source_index >= 0)
780         ist = input_streams[ost->source_index];
781
782     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
783         duration = 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base));
784
785     sync_ipts = in_picture->pts;
786     delta = sync_ipts - ost->sync_opts + duration;
787
788     /* by default, we output a single frame */
789     nb_frames = 1;
790
791     format_video_sync = video_sync_method;
792     if (format_video_sync == VSYNC_AUTO)
793         format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : 1;
794
795     switch (format_video_sync) {
796     case VSYNC_CFR:
797         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
798         if (delta < -1.1)
799             nb_frames = 0;
800         else if (delta > 1.1)
801             nb_frames = lrintf(delta);
802         break;
803     case VSYNC_VFR:
804         if (delta <= -0.6)
805             nb_frames = 0;
806         else if (delta > 0.6)
807             ost->sync_opts = lrint(sync_ipts);
808         break;
809     case VSYNC_DROP:
810     case VSYNC_PASSTHROUGH:
811         ost->sync_opts = lrint(sync_ipts);
812         break;
813     default:
814         av_assert0(0);
815     }
816
817     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
818     if (nb_frames == 0) {
819         nb_frames_drop++;
820         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
821         return;
822     } else if (nb_frames > 1) {
823         if (nb_frames > dts_error_threshold * 30) {
824             av_log(NULL, AV_LOG_ERROR, "%d frame duplication too large, skiping\n", nb_frames - 1);
825             nb_frames_drop++;
826             return;
827         }
828         nb_frames_dup += nb_frames - 1;
829         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
830     }
831
832   /* duplicates frame if needed */
833   for (i = 0; i < nb_frames; i++) {
834     av_init_packet(&pkt);
835     pkt.data = NULL;
836     pkt.size = 0;
837
838     in_picture->pts = ost->sync_opts;
839
840     if (!check_recording_time(ost))
841         return;
842
843     if (s->oformat->flags & AVFMT_RAWPICTURE &&
844         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
845         /* raw pictures are written as AVPicture structure to
846            avoid any copies. We support temporarily the older
847            method. */
848         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
849         enc->coded_frame->top_field_first  = in_picture->top_field_first;
850         pkt.data   = (uint8_t *)in_picture;
851         pkt.size   =  sizeof(AVPicture);
852         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
853         pkt.flags |= AV_PKT_FLAG_KEY;
854
855         video_size += pkt.size;
856         write_frame(s, &pkt, ost);
857     } else {
858         int got_packet;
859         AVFrame big_picture;
860
861         big_picture = *in_picture;
862         /* better than nothing: use input picture interlaced
863            settings */
864         big_picture.interlaced_frame = in_picture->interlaced_frame;
865         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
866             if (ost->top_field_first == -1)
867                 big_picture.top_field_first = in_picture->top_field_first;
868             else
869                 big_picture.top_field_first = !!ost->top_field_first;
870         }
871
872         /* handles same_quant here. This is not correct because it may
873            not be a global option */
874         big_picture.quality = quality;
875         if (!enc->me_threshold)
876             big_picture.pict_type = 0;
877         if (ost->forced_kf_index < ost->forced_kf_count &&
878             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
879             big_picture.pict_type = AV_PICTURE_TYPE_I;
880             ost->forced_kf_index++;
881         }
882         update_benchmark(NULL);
883         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
884         update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
885         if (ret < 0) {
886             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
887             exit_program(1);
888         }
889
890         if (got_packet) {
891             if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
892                 pkt.pts = ost->sync_opts;
893
894             if (pkt.pts != AV_NOPTS_VALUE)
895                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
896             if (pkt.dts != AV_NOPTS_VALUE)
897                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
898
899             if (debug_ts) {
900                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
901                     "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
902                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
903                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
904             }
905
906             frame_size = pkt.size;
907             video_size += pkt.size;
908             write_frame(s, &pkt, ost);
909             av_free_packet(&pkt);
910
911             /* if two pass, output log */
912             if (ost->logfile && enc->stats_out) {
913                 fprintf(ost->logfile, "%s", enc->stats_out);
914             }
915         }
916     }
917     ost->sync_opts++;
918     /*
919      * For video, number of frames in == number of packets out.
920      * But there may be reordering, so we can't throw away frames on encoder
921      * flush, we need to limit them here, before they go into encoder.
922      */
923     ost->frame_number++;
924   }
925
926     if (vstats_filename && frame_size)
927         do_video_stats(output_files[ost->file_index]->ctx, ost, frame_size);
928 }
929
930 static double psnr(double d)
931 {
932     return -10.0 * log(d) / log(10.0);
933 }
934
935 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
936                            int frame_size)
937 {
938     AVCodecContext *enc;
939     int frame_number;
940     double ti1, bitrate, avg_bitrate;
941
942     /* this is executed just the first time do_video_stats is called */
943     if (!vstats_file) {
944         vstats_file = fopen(vstats_filename, "w");
945         if (!vstats_file) {
946             perror("fopen");
947             exit_program(1);
948         }
949     }
950
951     enc = ost->st->codec;
952     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
953         frame_number = ost->frame_number;
954         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
955         if (enc->flags&CODEC_FLAG_PSNR)
956             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
957
958         fprintf(vstats_file,"f_size= %6d ", frame_size);
959         /* compute pts value */
960         ti1 = ost->sync_opts * av_q2d(enc->time_base);
961         if (ti1 < 0.01)
962             ti1 = 0.01;
963
964         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
965         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
966         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
967                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
968         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
969     }
970 }
971
972 /**
973  * Get and encode new output from any of the filtergraphs, without causing
974  * activity.
975  *
976  * @return  0 for success, <0 for severe errors
977  */
978 static int reap_filters(void)
979 {
980     AVFilterBufferRef *picref;
981     AVFrame *filtered_frame = NULL;
982     int i;
983     int64_t frame_pts;
984
985     /* Reap all buffers present in the buffer sinks */
986     for (i = 0; i < nb_output_streams; i++) {
987         OutputStream *ost = output_streams[i];
988         OutputFile    *of = output_files[ost->file_index];
989         int ret = 0;
990
991         if (!ost->filter)
992             continue;
993
994         if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
995             return AVERROR(ENOMEM);
996         } else
997             avcodec_get_frame_defaults(ost->filtered_frame);
998         filtered_frame = ost->filtered_frame;
999
1000         while (1) {
1001             ret = av_buffersink_get_buffer_ref(ost->filter->filter, &picref,
1002                                                AV_BUFFERSINK_FLAG_NO_REQUEST);
1003             if (ret < 0) {
1004                 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1005                     char buf[256];
1006                     av_strerror(ret, buf, sizeof(buf));
1007                     av_log(NULL, AV_LOG_WARNING,
1008                            "Error in av_buffersink_get_buffer_ref(): %s\n", buf);
1009                 }
1010                 break;
1011             }
1012             frame_pts = AV_NOPTS_VALUE;
1013             if (picref->pts != AV_NOPTS_VALUE) {
1014                 filtered_frame->pts = frame_pts = av_rescale_q(picref->pts,
1015                                                 ost->filter->filter->inputs[0]->time_base,
1016                                                 ost->st->codec->time_base) -
1017                                     av_rescale_q(of->start_time,
1018                                                 AV_TIME_BASE_Q,
1019                                                 ost->st->codec->time_base);
1020
1021                 if (of->start_time && filtered_frame->pts < 0) {
1022                     avfilter_unref_buffer(picref);
1023                     continue;
1024                 }
1025             }
1026             //if (ost->source_index >= 0)
1027             //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1028
1029
1030             switch (ost->filter->filter->inputs[0]->type) {
1031             case AVMEDIA_TYPE_VIDEO:
1032                 avfilter_copy_buf_props(filtered_frame, picref);
1033                 filtered_frame->pts = frame_pts;
1034                 if (!ost->frame_aspect_ratio)
1035                     ost->st->codec->sample_aspect_ratio = picref->video->sample_aspect_ratio;
1036
1037                 do_video_out(of->ctx, ost, filtered_frame,
1038                              same_quant ? ost->last_quality :
1039                                           ost->st->codec->global_quality);
1040                 break;
1041             case AVMEDIA_TYPE_AUDIO:
1042                 avfilter_copy_buf_props(filtered_frame, picref);
1043                 filtered_frame->pts = frame_pts;
1044                 do_audio_out(of->ctx, ost, filtered_frame);
1045                 break;
1046             default:
1047                 // TODO support subtitle filters
1048                 av_assert0(0);
1049             }
1050
1051             avfilter_unref_buffer(picref);
1052         }
1053     }
1054
1055     return 0;
1056 }
1057
1058 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
1059 {
1060     char buf[1024];
1061     AVBPrint buf_script;
1062     OutputStream *ost;
1063     AVFormatContext *oc;
1064     int64_t total_size;
1065     AVCodecContext *enc;
1066     int frame_number, vid, i;
1067     double bitrate;
1068     int64_t pts = INT64_MIN;
1069     static int64_t last_time = -1;
1070     static int qp_histogram[52];
1071     int hours, mins, secs, us;
1072
1073     if (!print_stats && !is_last_report && !progress_avio)
1074         return;
1075
1076     if (!is_last_report) {
1077         if (last_time == -1) {
1078             last_time = cur_time;
1079             return;
1080         }
1081         if ((cur_time - last_time) < 500000)
1082             return;
1083         last_time = cur_time;
1084     }
1085
1086
1087     oc = output_files[0]->ctx;
1088
1089     total_size = avio_size(oc->pb);
1090     if (total_size < 0) { // FIXME improve avio_size() so it works with non seekable output too
1091         total_size = avio_tell(oc->pb);
1092         if (total_size < 0)
1093             total_size = 0;
1094     }
1095
1096     buf[0] = '\0';
1097     vid = 0;
1098     av_bprint_init(&buf_script, 0, 1);
1099     for (i = 0; i < nb_output_streams; i++) {
1100         float q = -1;
1101         ost = output_streams[i];
1102         enc = ost->st->codec;
1103         if (!ost->stream_copy && enc->coded_frame)
1104             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1105         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1106             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1107             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1108                        ost->file_index, ost->index, q);
1109         }
1110         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1111             float fps, t = (cur_time-timer_start) / 1000000.0;
1112
1113             frame_number = ost->frame_number;
1114             fps = t > 1 ? frame_number / t : 0;
1115             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
1116                      frame_number, fps < 9.95, fps, q);
1117             av_bprintf(&buf_script, "frame=%d\n", frame_number);
1118             av_bprintf(&buf_script, "fps=%.1f\n", fps);
1119             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1120                        ost->file_index, ost->index, q);
1121             if (is_last_report)
1122                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1123             if (qp_hist) {
1124                 int j;
1125                 int qp = lrintf(q);
1126                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1127                     qp_histogram[qp]++;
1128                 for (j = 0; j < 32; j++)
1129                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
1130             }
1131             if (enc->flags&CODEC_FLAG_PSNR) {
1132                 int j;
1133                 double error, error_sum = 0;
1134                 double scale, scale_sum = 0;
1135                 double p;
1136                 char type[3] = { 'Y','U','V' };
1137                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1138                 for (j = 0; j < 3; j++) {
1139                     if (is_last_report) {
1140                         error = enc->error[j];
1141                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1142                     } else {
1143                         error = enc->coded_frame->error[j];
1144                         scale = enc->width * enc->height * 255.0 * 255.0;
1145                     }
1146                     if (j)
1147                         scale /= 4;
1148                     error_sum += error;
1149                     scale_sum += scale;
1150                     p = psnr(error / scale);
1151                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], p);
1152                     av_bprintf(&buf_script, "stream_%d_%d_psnr_%c=%2.2f\n",
1153                                ost->file_index, ost->index, type[i] | 32, p);
1154                 }
1155                 p = psnr(error_sum / scale_sum);
1156                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1157                 av_bprintf(&buf_script, "stream_%d_%d_psnr_all=%2.2f\n",
1158                            ost->file_index, ost->index, p);
1159             }
1160             vid = 1;
1161         }
1162         /* compute min output value */
1163         if ((is_last_report || !ost->finished) && ost->st->pts.val != AV_NOPTS_VALUE)
1164             pts = FFMAX(pts, av_rescale_q(ost->st->pts.val,
1165                                           ost->st->time_base, AV_TIME_BASE_Q));
1166     }
1167
1168     secs = pts / AV_TIME_BASE;
1169     us = pts % AV_TIME_BASE;
1170     mins = secs / 60;
1171     secs %= 60;
1172     hours = mins / 60;
1173     mins %= 60;
1174
1175     bitrate = pts ? total_size * 8 / (pts / 1000.0) : 0;
1176
1177     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1178              "size=%8.0fkB time=", total_size / 1024.0);
1179     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1180              "%02d:%02d:%02d.%02d ", hours, mins, secs,
1181              (100 * us) / AV_TIME_BASE);
1182     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1183              "bitrate=%6.1fkbits/s", bitrate);
1184     av_bprintf(&buf_script, "total_size=%"PRId64"\n", total_size);
1185     av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
1186     av_bprintf(&buf_script, "out_time=%02d:%02d:%02d.%06d\n",
1187                hours, mins, secs, us);
1188
1189     if (nb_frames_dup || nb_frames_drop)
1190         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1191                 nb_frames_dup, nb_frames_drop);
1192     av_bprintf(&buf_script, "dup_frames=%d\n", nb_frames_dup);
1193     av_bprintf(&buf_script, "drop_frames=%d\n", nb_frames_drop);
1194
1195     if (print_stats || is_last_report) {
1196     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1197
1198     fflush(stderr);
1199     }
1200
1201     if (progress_avio) {
1202         av_bprintf(&buf_script, "progress=%s\n",
1203                    is_last_report ? "end" : "continue");
1204         avio_write(progress_avio, buf_script.str,
1205                    FFMIN(buf_script.len, buf_script.size - 1));
1206         avio_flush(progress_avio);
1207         av_bprint_finalize(&buf_script, NULL);
1208         if (is_last_report) {
1209             avio_close(progress_avio);
1210             progress_avio = NULL;
1211         }
1212     }
1213
1214     if (is_last_report) {
1215         int64_t raw= audio_size + video_size + subtitle_size + extra_size;
1216         av_log(NULL, AV_LOG_INFO, "\n");
1217         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB subtitle:%1.0f global headers:%1.0fkB muxing overhead %f%%\n",
1218                video_size / 1024.0,
1219                audio_size / 1024.0,
1220                subtitle_size / 1024.0,
1221                extra_size / 1024.0,
1222                100.0 * (total_size - raw) / raw
1223         );
1224         if(video_size + audio_size + subtitle_size + extra_size == 0){
1225             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
1226         }
1227     }
1228 }
1229
1230 static void flush_encoders(void)
1231 {
1232     int i, ret;
1233
1234     for (i = 0; i < nb_output_streams; i++) {
1235         OutputStream   *ost = output_streams[i];
1236         AVCodecContext *enc = ost->st->codec;
1237         AVFormatContext *os = output_files[ost->file_index]->ctx;
1238         int stop_encoding = 0;
1239
1240         if (!ost->encoding_needed)
1241             continue;
1242
1243         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1244             continue;
1245         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
1246             continue;
1247
1248         for (;;) {
1249             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1250             const char *desc;
1251             int64_t *size;
1252
1253             switch (ost->st->codec->codec_type) {
1254             case AVMEDIA_TYPE_AUDIO:
1255                 encode = avcodec_encode_audio2;
1256                 desc   = "Audio";
1257                 size   = &audio_size;
1258                 break;
1259             case AVMEDIA_TYPE_VIDEO:
1260                 encode = avcodec_encode_video2;
1261                 desc   = "Video";
1262                 size   = &video_size;
1263                 break;
1264             default:
1265                 stop_encoding = 1;
1266             }
1267
1268             if (encode) {
1269                 AVPacket pkt;
1270                 int got_packet;
1271                 av_init_packet(&pkt);
1272                 pkt.data = NULL;
1273                 pkt.size = 0;
1274
1275                 update_benchmark(NULL);
1276                 ret = encode(enc, &pkt, NULL, &got_packet);
1277                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
1278                 if (ret < 0) {
1279                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1280                     exit_program(1);
1281                 }
1282                 *size += pkt.size;
1283                 if (ost->logfile && enc->stats_out) {
1284                     fprintf(ost->logfile, "%s", enc->stats_out);
1285                 }
1286                 if (!got_packet) {
1287                     stop_encoding = 1;
1288                     break;
1289                 }
1290                 if (pkt.pts != AV_NOPTS_VALUE)
1291                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1292                 if (pkt.dts != AV_NOPTS_VALUE)
1293                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1294                 write_frame(os, &pkt, ost);
1295             }
1296
1297             if (stop_encoding)
1298                 break;
1299         }
1300     }
1301 }
1302
1303 /*
1304  * Check whether a packet from ist should be written into ost at this time
1305  */
1306 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1307 {
1308     OutputFile *of = output_files[ost->file_index];
1309     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1310
1311     if (ost->source_index != ist_index)
1312         return 0;
1313
1314     if (of->start_time && ist->pts < of->start_time)
1315         return 0;
1316
1317     return 1;
1318 }
1319
1320 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1321 {
1322     OutputFile *of = output_files[ost->file_index];
1323     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
1324     AVPicture pict;
1325     AVPacket opkt;
1326
1327     av_init_packet(&opkt);
1328
1329     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1330         !ost->copy_initial_nonkeyframes)
1331         return;
1332
1333     if (of->recording_time != INT64_MAX &&
1334         ist->pts >= of->recording_time + of->start_time) {
1335         close_output_stream(ost);
1336         return;
1337     }
1338
1339     /* force the input stream PTS */
1340     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1341         audio_size += pkt->size;
1342     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1343         video_size += pkt->size;
1344         ost->sync_opts++;
1345     } else if (ost->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1346         subtitle_size += pkt->size;
1347     }
1348
1349     if (pkt->pts != AV_NOPTS_VALUE)
1350         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1351     else
1352         opkt.pts = AV_NOPTS_VALUE;
1353
1354     if (pkt->dts == AV_NOPTS_VALUE)
1355         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
1356     else
1357         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1358     opkt.dts -= ost_tb_start_time;
1359
1360     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1361     opkt.flags    = pkt->flags;
1362
1363     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1364     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1365        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1366        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1367        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1368        ) {
1369         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1370             opkt.destruct = av_destruct_packet;
1371     } else {
1372         opkt.data = pkt->data;
1373         opkt.size = pkt->size;
1374     }
1375
1376     if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (of->ctx->oformat->flags & AVFMT_RAWPICTURE)) {
1377         /* store AVPicture in AVPacket, as expected by the output format */
1378         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
1379         opkt.data = (uint8_t *)&pict;
1380         opkt.size = sizeof(AVPicture);
1381         opkt.flags |= AV_PKT_FLAG_KEY;
1382     }
1383
1384     write_frame(of->ctx, &opkt, ost);
1385     ost->st->codec->frame_number++;
1386     av_free_packet(&opkt);
1387 }
1388
1389 static void rate_emu_sleep(InputStream *ist)
1390 {
1391     if (input_files[ist->file_index]->rate_emu) {
1392         int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
1393         int64_t now = av_gettime() - ist->start;
1394         if (pts > now)
1395             av_usleep(pts - now);
1396     }
1397 }
1398
1399 int guess_input_channel_layout(InputStream *ist)
1400 {
1401     AVCodecContext *dec = ist->st->codec;
1402
1403     if (!dec->channel_layout) {
1404         char layout_name[256];
1405
1406         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1407         if (!dec->channel_layout)
1408             return 0;
1409         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1410                                      dec->channels, dec->channel_layout);
1411         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1412                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1413     }
1414     return 1;
1415 }
1416
1417 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1418 {
1419     AVFrame *decoded_frame;
1420     AVCodecContext *avctx = ist->st->codec;
1421     int i, ret, resample_changed;
1422     AVRational decoded_frame_tb;
1423
1424     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1425         return AVERROR(ENOMEM);
1426     else
1427         avcodec_get_frame_defaults(ist->decoded_frame);
1428     decoded_frame = ist->decoded_frame;
1429
1430     update_benchmark(NULL);
1431     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1432     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
1433
1434     if (ret >= 0 && avctx->sample_rate <= 0) {
1435         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
1436         ret = AVERROR_INVALIDDATA;
1437     }
1438
1439     if (!*got_output || ret < 0) {
1440         if (!pkt->size) {
1441             for (i = 0; i < ist->nb_filters; i++)
1442                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1443         }
1444         return ret;
1445     }
1446
1447 #if 1
1448     /* increment next_dts to use for the case where the input stream does not
1449        have timestamps or there are multiple frames in the packet */
1450     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1451                      avctx->sample_rate;
1452     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1453                      avctx->sample_rate;
1454 #endif
1455
1456     rate_emu_sleep(ist);
1457
1458     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1459                        ist->resample_channels       != avctx->channels               ||
1460                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1461                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1462     if (resample_changed) {
1463         char layout1[64], layout2[64];
1464
1465         if (!guess_input_channel_layout(ist)) {
1466             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1467                    "layout for Input Stream #%d.%d\n", ist->file_index,
1468                    ist->st->index);
1469             exit_program(1);
1470         }
1471         decoded_frame->channel_layout = avctx->channel_layout;
1472
1473         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1474                                      ist->resample_channel_layout);
1475         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1476                                      decoded_frame->channel_layout);
1477
1478         av_log(NULL, AV_LOG_INFO,
1479                "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",
1480                ist->file_index, ist->st->index,
1481                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1482                ist->resample_channels, layout1,
1483                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1484                avctx->channels, layout2);
1485
1486         ist->resample_sample_fmt     = decoded_frame->format;
1487         ist->resample_sample_rate    = decoded_frame->sample_rate;
1488         ist->resample_channel_layout = decoded_frame->channel_layout;
1489         ist->resample_channels       = avctx->channels;
1490
1491         for (i = 0; i < nb_filtergraphs; i++)
1492             if (ist_in_filtergraph(filtergraphs[i], ist)) {
1493                 FilterGraph *fg = filtergraphs[i];
1494                 int j;
1495                 if (configure_filtergraph(fg) < 0) {
1496                     av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1497                     exit_program(1);
1498                 }
1499                 for (j = 0; j < fg->nb_outputs; j++) {
1500                     OutputStream *ost = fg->outputs[j]->ost;
1501                     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1502                         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1503                         av_buffersink_set_frame_size(ost->filter->filter,
1504                                                      ost->st->codec->frame_size);
1505                 }
1506             }
1507     }
1508
1509     /* if the decoder provides a pts, use it instead of the last packet pts.
1510        the decoder could be delaying output by a packet or more. */
1511     if (decoded_frame->pts != AV_NOPTS_VALUE) {
1512         ist->dts = ist->next_dts = ist->pts = ist->next_pts = av_rescale_q(decoded_frame->pts, avctx->time_base, AV_TIME_BASE_Q);
1513         decoded_frame_tb   = avctx->time_base;
1514     } else if (decoded_frame->pkt_pts != AV_NOPTS_VALUE) {
1515         decoded_frame->pts = decoded_frame->pkt_pts;
1516         pkt->pts           = AV_NOPTS_VALUE;
1517         decoded_frame_tb   = ist->st->time_base;
1518     } else if (pkt->pts != AV_NOPTS_VALUE) {
1519         decoded_frame->pts = pkt->pts;
1520         pkt->pts           = AV_NOPTS_VALUE;
1521         decoded_frame_tb   = ist->st->time_base;
1522     }else {
1523         decoded_frame->pts = ist->dts;
1524         decoded_frame_tb   = AV_TIME_BASE_Q;
1525     }
1526     if (decoded_frame->pts != AV_NOPTS_VALUE)
1527         decoded_frame->pts = av_rescale_q(decoded_frame->pts,
1528                                           decoded_frame_tb,
1529                                           (AVRational){1, ist->st->codec->sample_rate});
1530     for (i = 0; i < ist->nb_filters; i++)
1531         av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame,
1532                                AV_BUFFERSRC_FLAG_PUSH);
1533
1534     decoded_frame->pts = AV_NOPTS_VALUE;
1535
1536     return ret;
1537 }
1538
1539 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1540 {
1541     AVFrame *decoded_frame;
1542     void *buffer_to_free = NULL;
1543     int i, ret = 0, resample_changed;
1544     int64_t best_effort_timestamp;
1545     AVRational *frame_sample_aspect;
1546     float quality;
1547
1548     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1549         return AVERROR(ENOMEM);
1550     else
1551         avcodec_get_frame_defaults(ist->decoded_frame);
1552     decoded_frame = ist->decoded_frame;
1553     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
1554
1555     update_benchmark(NULL);
1556     ret = avcodec_decode_video2(ist->st->codec,
1557                                 decoded_frame, got_output, pkt);
1558     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
1559     if (!*got_output || ret < 0) {
1560         if (!pkt->size) {
1561             for (i = 0; i < ist->nb_filters; i++)
1562                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1563         }
1564         return ret;
1565     }
1566
1567     quality = same_quant ? decoded_frame->quality : 0;
1568
1569     if(ist->top_field_first>=0)
1570         decoded_frame->top_field_first = ist->top_field_first;
1571
1572     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
1573     if(best_effort_timestamp != AV_NOPTS_VALUE)
1574         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
1575
1576     if (debug_ts) {
1577         av_log(NULL, AV_LOG_INFO, "decoder -> ist_index:%d type:video "
1578                 "frame_pts:%s frame_pts_time:%s best_effort_ts:%"PRId64" best_effort_ts_time:%s keyframe:%d frame_type:%d \n",
1579                 ist->st->index, av_ts2str(decoded_frame->pts),
1580                 av_ts2timestr(decoded_frame->pts, &ist->st->time_base),
1581                 best_effort_timestamp,
1582                 av_ts2timestr(best_effort_timestamp, &ist->st->time_base),
1583                 decoded_frame->key_frame, decoded_frame->pict_type);
1584     }
1585
1586     pkt->size = 0;
1587     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
1588
1589     rate_emu_sleep(ist);
1590
1591     if (ist->st->sample_aspect_ratio.num)
1592         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1593
1594     resample_changed = ist->resample_width   != decoded_frame->width  ||
1595                        ist->resample_height  != decoded_frame->height ||
1596                        ist->resample_pix_fmt != decoded_frame->format;
1597     if (resample_changed) {
1598         av_log(NULL, AV_LOG_INFO,
1599                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1600                ist->file_index, ist->st->index,
1601                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1602                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1603
1604         ist->resample_width   = decoded_frame->width;
1605         ist->resample_height  = decoded_frame->height;
1606         ist->resample_pix_fmt = decoded_frame->format;
1607
1608         for (i = 0; i < nb_filtergraphs; i++)
1609             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1610                 configure_filtergraph(filtergraphs[i]) < 0) {
1611                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1612                 exit_program(1);
1613             }
1614     }
1615
1616     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
1617     for (i = 0; i < ist->nb_filters; i++) {
1618         int changed =      ist->st->codec->width   != ist->filters[i]->filter->outputs[0]->w
1619                         || ist->st->codec->height  != ist->filters[i]->filter->outputs[0]->h
1620                         || ist->st->codec->pix_fmt != ist->filters[i]->filter->outputs[0]->format;
1621         // XXX what an ugly hack
1622         if (ist->filters[i]->graph->nb_outputs == 1)
1623             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
1624
1625         if (!frame_sample_aspect->num)
1626             *frame_sample_aspect = ist->st->sample_aspect_ratio;
1627         if (ist->dr1 && decoded_frame->type==FF_BUFFER_TYPE_USER && !changed) {
1628             FrameBuffer      *buf = decoded_frame->opaque;
1629             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
1630                                         decoded_frame->data, decoded_frame->linesize,
1631                                         AV_PERM_READ | AV_PERM_PRESERVE,
1632                                         ist->st->codec->width, ist->st->codec->height,
1633                                         ist->st->codec->pix_fmt);
1634
1635             avfilter_copy_frame_props(fb, decoded_frame);
1636             fb->buf->priv           = buf;
1637             fb->buf->free           = filter_release_buffer;
1638
1639             av_assert0(buf->refcount>0);
1640             buf->refcount++;
1641             av_buffersrc_add_ref(ist->filters[i]->filter, fb,
1642                                  AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT |
1643                                  AV_BUFFERSRC_FLAG_NO_COPY |
1644                                  AV_BUFFERSRC_FLAG_PUSH);
1645         } else
1646         if(av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, AV_BUFFERSRC_FLAG_PUSH)<0) {
1647             av_log(NULL, AV_LOG_FATAL, "Failed to inject frame into filter network\n");
1648             exit_program(1);
1649         }
1650
1651     }
1652
1653     av_free(buffer_to_free);
1654     return ret;
1655 }
1656
1657 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1658 {
1659     AVSubtitle subtitle;
1660     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1661                                           &subtitle, got_output, pkt);
1662     if (ret < 0 || !*got_output) {
1663         if (!pkt->size)
1664             sub2video_flush(ist);
1665         return ret;
1666     }
1667
1668     if (ist->fix_sub_duration) {
1669         if (ist->prev_sub.got_output) {
1670             int end = av_rescale(subtitle.pts - ist->prev_sub.subtitle.pts,
1671                                  1000, AV_TIME_BASE);
1672             if (end < ist->prev_sub.subtitle.end_display_time) {
1673                 av_log(ist->st->codec, AV_LOG_DEBUG,
1674                        "Subtitle duration reduced from %d to %d\n",
1675                        ist->prev_sub.subtitle.end_display_time, end);
1676                 ist->prev_sub.subtitle.end_display_time = end;
1677             }
1678         }
1679         FFSWAP(int,        *got_output, ist->prev_sub.got_output);
1680         FFSWAP(int,        ret,         ist->prev_sub.ret);
1681         FFSWAP(AVSubtitle, subtitle,    ist->prev_sub.subtitle);
1682     }
1683
1684     sub2video_update(ist, &subtitle);
1685
1686     if (!*got_output || !subtitle.num_rects)
1687         return ret;
1688
1689     rate_emu_sleep(ist);
1690
1691     for (i = 0; i < nb_output_streams; i++) {
1692         OutputStream *ost = output_streams[i];
1693
1694         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1695             continue;
1696
1697         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle);
1698     }
1699
1700     avsubtitle_free(&subtitle);
1701     return ret;
1702 }
1703
1704 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1705 static int output_packet(InputStream *ist, const AVPacket *pkt)
1706 {
1707     int ret = 0, i;
1708     int got_output;
1709
1710     AVPacket avpkt;
1711     if (!ist->saw_first_ts) {
1712         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;
1713         ist->pts = 0;
1714         if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
1715             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
1716             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
1717         }
1718         ist->saw_first_ts = 1;
1719     }
1720
1721     if (ist->next_dts == AV_NOPTS_VALUE)
1722         ist->next_dts = ist->dts;
1723     if (ist->next_pts == AV_NOPTS_VALUE)
1724         ist->next_pts = ist->pts;
1725
1726     if (pkt == NULL) {
1727         /* EOF handling */
1728         av_init_packet(&avpkt);
1729         avpkt.data = NULL;
1730         avpkt.size = 0;
1731         goto handle_eof;
1732     } else {
1733         avpkt = *pkt;
1734     }
1735
1736     if (pkt->dts != AV_NOPTS_VALUE) {
1737         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1738         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
1739             ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1740     }
1741
1742     // while we have more to decode or while the decoder did output something on EOF
1743     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1744         int duration;
1745     handle_eof:
1746
1747         ist->pts = ist->next_pts;
1748         ist->dts = ist->next_dts;
1749
1750         if (avpkt.size && avpkt.size != pkt->size) {
1751             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1752                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1753             ist->showed_multi_packet_warning = 1;
1754         }
1755
1756         switch (ist->st->codec->codec_type) {
1757         case AVMEDIA_TYPE_AUDIO:
1758             ret = decode_audio    (ist, &avpkt, &got_output);
1759             break;
1760         case AVMEDIA_TYPE_VIDEO:
1761             ret = decode_video    (ist, &avpkt, &got_output);
1762             if (avpkt.duration) {
1763                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1764             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
1765                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
1766                 duration = ((int64_t)AV_TIME_BASE *
1767                                 ist->st->codec->time_base.num * ticks) /
1768                                 ist->st->codec->time_base.den;
1769             } else
1770                 duration = 0;
1771
1772             if(ist->dts != AV_NOPTS_VALUE && duration) {
1773                 ist->next_dts += duration;
1774             }else
1775                 ist->next_dts = AV_NOPTS_VALUE;
1776
1777             if (got_output)
1778                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
1779             break;
1780         case AVMEDIA_TYPE_SUBTITLE:
1781             ret = transcode_subtitles(ist, &avpkt, &got_output);
1782             break;
1783         default:
1784             return -1;
1785         }
1786
1787         if (ret < 0)
1788             return ret;
1789
1790         avpkt.dts=
1791         avpkt.pts= AV_NOPTS_VALUE;
1792
1793         // touch data and size only if not EOF
1794         if (pkt) {
1795             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
1796                 ret = avpkt.size;
1797             avpkt.data += ret;
1798             avpkt.size -= ret;
1799         }
1800         if (!got_output) {
1801             continue;
1802         }
1803     }
1804
1805     /* handle stream copy */
1806     if (!ist->decoding_needed) {
1807         rate_emu_sleep(ist);
1808         ist->dts = ist->next_dts;
1809         switch (ist->st->codec->codec_type) {
1810         case AVMEDIA_TYPE_AUDIO:
1811             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1812                              ist->st->codec->sample_rate;
1813             break;
1814         case AVMEDIA_TYPE_VIDEO:
1815             if (pkt->duration) {
1816                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
1817             } else if(ist->st->codec->time_base.num != 0) {
1818                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
1819                 ist->next_dts += ((int64_t)AV_TIME_BASE *
1820                                   ist->st->codec->time_base.num * ticks) /
1821                                   ist->st->codec->time_base.den;
1822             }
1823             break;
1824         }
1825         ist->pts = ist->dts;
1826         ist->next_pts = ist->next_dts;
1827     }
1828     for (i = 0; pkt && i < nb_output_streams; i++) {
1829         OutputStream *ost = output_streams[i];
1830
1831         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1832             continue;
1833
1834         do_streamcopy(ist, ost, pkt);
1835     }
1836
1837     return 0;
1838 }
1839
1840 static void print_sdp(void)
1841 {
1842     char sdp[2048];
1843     int i;
1844     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
1845
1846     if (!avc)
1847         exit_program(1);
1848     for (i = 0; i < nb_output_files; i++)
1849         avc[i] = output_files[i]->ctx;
1850
1851     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
1852     printf("SDP:\n%s\n", sdp);
1853     fflush(stdout);
1854     av_freep(&avc);
1855 }
1856
1857 static int init_input_stream(int ist_index, char *error, int error_len)
1858 {
1859     InputStream *ist = input_streams[ist_index];
1860
1861     if (ist->decoding_needed) {
1862         AVCodec *codec = ist->dec;
1863         if (!codec) {
1864             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
1865                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
1866             return AVERROR(EINVAL);
1867         }
1868
1869         ist->dr1 = (codec->capabilities & CODEC_CAP_DR1) && !do_deinterlace;
1870         if (codec->type == AVMEDIA_TYPE_VIDEO && ist->dr1) {
1871             ist->st->codec->get_buffer     = codec_get_buffer;
1872             ist->st->codec->release_buffer = codec_release_buffer;
1873             ist->st->codec->opaque         = &ist->buffer_pool;
1874         }
1875
1876         if (!av_dict_get(ist->opts, "threads", NULL, 0))
1877             av_dict_set(&ist->opts, "threads", "auto", 0);
1878         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
1879             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
1880                     ist->file_index, ist->st->index);
1881             return AVERROR(EINVAL);
1882         }
1883         assert_codec_experimental(ist->st->codec, 0);
1884         assert_avoptions(ist->opts);
1885     }
1886
1887     ist->next_pts = AV_NOPTS_VALUE;
1888     ist->next_dts = AV_NOPTS_VALUE;
1889     ist->is_start = 1;
1890
1891     return 0;
1892 }
1893
1894 static InputStream *get_input_stream(OutputStream *ost)
1895 {
1896     if (ost->source_index >= 0)
1897         return input_streams[ost->source_index];
1898     return NULL;
1899 }
1900
1901 static void parse_forced_key_frames(char *kf, OutputStream *ost,
1902                                     AVCodecContext *avctx)
1903 {
1904     char *p;
1905     int n = 1, i;
1906     int64_t t;
1907
1908     for (p = kf; *p; p++)
1909         if (*p == ',')
1910             n++;
1911     ost->forced_kf_count = n;
1912     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
1913     if (!ost->forced_kf_pts) {
1914         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
1915         exit_program(1);
1916     }
1917
1918     p = kf;
1919     for (i = 0; i < n; i++) {
1920         char *next = strchr(p, ',');
1921
1922         if (next)
1923             *next++ = 0;
1924
1925         t = parse_time_or_die("force_key_frames", p, 1);
1926         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
1927
1928         p = next;
1929     }
1930 }
1931
1932 static void report_new_stream(int input_index, AVPacket *pkt)
1933 {
1934     InputFile *file = input_files[input_index];
1935     AVStream *st = file->ctx->streams[pkt->stream_index];
1936
1937     if (pkt->stream_index < file->nb_streams_warn)
1938         return;
1939     av_log(file->ctx, AV_LOG_WARNING,
1940            "New %s stream %d:%d at pos:%"PRId64" and DTS:%ss\n",
1941            av_get_media_type_string(st->codec->codec_type),
1942            input_index, pkt->stream_index,
1943            pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
1944     file->nb_streams_warn = pkt->stream_index + 1;
1945 }
1946
1947 static int transcode_init(void)
1948 {
1949     int ret = 0, i, j, k;
1950     AVFormatContext *oc;
1951     AVCodecContext *codec;
1952     OutputStream *ost;
1953     InputStream *ist;
1954     char error[1024];
1955     int want_sdp = 1;
1956
1957     /* init framerate emulation */
1958     for (i = 0; i < nb_input_files; i++) {
1959         InputFile *ifile = input_files[i];
1960         if (ifile->rate_emu)
1961             for (j = 0; j < ifile->nb_streams; j++)
1962                 input_streams[j + ifile->ist_index]->start = av_gettime();
1963     }
1964
1965     /* output stream init */
1966     for (i = 0; i < nb_output_files; i++) {
1967         oc = output_files[i]->ctx;
1968         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
1969             av_dump_format(oc, i, oc->filename, 1);
1970             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
1971             return AVERROR(EINVAL);
1972         }
1973     }
1974
1975     /* init complex filtergraphs */
1976     for (i = 0; i < nb_filtergraphs; i++)
1977         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
1978             return ret;
1979
1980     /* for each output stream, we compute the right encoding parameters */
1981     for (i = 0; i < nb_output_streams; i++) {
1982         AVCodecContext *icodec = NULL;
1983         ost = output_streams[i];
1984         oc  = output_files[ost->file_index]->ctx;
1985         ist = get_input_stream(ost);
1986
1987         if (ost->attachment_filename)
1988             continue;
1989
1990         codec  = ost->st->codec;
1991
1992         if (ist) {
1993             icodec = ist->st->codec;
1994
1995             ost->st->disposition          = ist->st->disposition;
1996             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
1997             codec->chroma_sample_location = icodec->chroma_sample_location;
1998         }
1999
2000         if (ost->stream_copy) {
2001             uint64_t extra_size;
2002
2003             av_assert0(ist && !ost->filter);
2004
2005             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2006
2007             if (extra_size > INT_MAX) {
2008                 return AVERROR(EINVAL);
2009             }
2010
2011             /* if stream_copy is selected, no need to decode or encode */
2012             codec->codec_id   = icodec->codec_id;
2013             codec->codec_type = icodec->codec_type;
2014
2015             if (!codec->codec_tag) {
2016                 if (!oc->oformat->codec_tag ||
2017                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2018                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2019                     codec->codec_tag = icodec->codec_tag;
2020             }
2021
2022             codec->bit_rate       = icodec->bit_rate;
2023             codec->rc_max_rate    = icodec->rc_max_rate;
2024             codec->rc_buffer_size = icodec->rc_buffer_size;
2025             codec->field_order    = icodec->field_order;
2026             codec->extradata      = av_mallocz(extra_size);
2027             if (!codec->extradata) {
2028                 return AVERROR(ENOMEM);
2029             }
2030             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2031             codec->extradata_size= icodec->extradata_size;
2032             codec->bits_per_coded_sample  = icodec->bits_per_coded_sample;
2033
2034             codec->time_base = ist->st->time_base;
2035             /*
2036              * Avi is a special case here because it supports variable fps but
2037              * having the fps and timebase differe significantly adds quite some
2038              * overhead
2039              */
2040             if(!strcmp(oc->oformat->name, "avi")) {
2041                 if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
2042                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
2043                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(icodec->time_base)
2044                                && av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(icodec->time_base) < 1.0/500
2045                      || copy_tb==2){
2046                     codec->time_base.num = ist->st->r_frame_rate.den;
2047                     codec->time_base.den = 2*ist->st->r_frame_rate.num;
2048                     codec->ticks_per_frame = 2;
2049                 } else if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2050                                  && av_q2d(ist->st->time_base) < 1.0/500
2051                     || copy_tb==0){
2052                     codec->time_base = icodec->time_base;
2053                     codec->time_base.num *= icodec->ticks_per_frame;
2054                     codec->time_base.den *= 2;
2055                     codec->ticks_per_frame = 2;
2056                 }
2057             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2058                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2059                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2060             ) {
2061                 if(   copy_tb<0 && icodec->time_base.den
2062                                 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
2063                                 && av_q2d(ist->st->time_base) < 1.0/500
2064                    || copy_tb==0){
2065                     codec->time_base = icodec->time_base;
2066                     codec->time_base.num *= icodec->ticks_per_frame;
2067                 }
2068             }
2069
2070             if(ost->frame_rate.num)
2071                 codec->time_base = av_inv_q(ost->frame_rate);
2072
2073             av_reduce(&codec->time_base.num, &codec->time_base.den,
2074                         codec->time_base.num, codec->time_base.den, INT_MAX);
2075
2076             switch (codec->codec_type) {
2077             case AVMEDIA_TYPE_AUDIO:
2078                 if (audio_volume != 256) {
2079                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2080                     exit_program(1);
2081                 }
2082                 codec->channel_layout     = icodec->channel_layout;
2083                 codec->sample_rate        = icodec->sample_rate;
2084                 codec->channels           = icodec->channels;
2085                 codec->frame_size         = icodec->frame_size;
2086                 codec->audio_service_type = icodec->audio_service_type;
2087                 codec->block_align        = icodec->block_align;
2088                 if((codec->block_align == 1 || codec->block_align == 1152) && codec->codec_id == AV_CODEC_ID_MP3)
2089                     codec->block_align= 0;
2090                 if(codec->codec_id == AV_CODEC_ID_AC3)
2091                     codec->block_align= 0;
2092                 break;
2093             case AVMEDIA_TYPE_VIDEO:
2094                 codec->pix_fmt            = icodec->pix_fmt;
2095                 codec->width              = icodec->width;
2096                 codec->height             = icodec->height;
2097                 codec->has_b_frames       = icodec->has_b_frames;
2098                 if (!codec->sample_aspect_ratio.num) {
2099                     codec->sample_aspect_ratio   =
2100                     ost->st->sample_aspect_ratio =
2101                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2102                         ist->st->codec->sample_aspect_ratio.num ?
2103                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2104                 }
2105                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2106                 break;
2107             case AVMEDIA_TYPE_SUBTITLE:
2108                 codec->width  = icodec->width;
2109                 codec->height = icodec->height;
2110                 break;
2111             case AVMEDIA_TYPE_DATA:
2112             case AVMEDIA_TYPE_ATTACHMENT:
2113                 break;
2114             default:
2115                 abort();
2116             }
2117         } else {
2118             if (!ost->enc)
2119                 ost->enc = avcodec_find_encoder(codec->codec_id);
2120             if (!ost->enc) {
2121                 /* should only happen when a default codec is not present. */
2122                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
2123                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
2124                 ret = AVERROR(EINVAL);
2125                 goto dump_format;
2126             }
2127
2128             if (ist)
2129                 ist->decoding_needed++;
2130             ost->encoding_needed = 1;
2131
2132             if (!ost->filter &&
2133                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2134                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2135                     FilterGraph *fg;
2136                     fg = init_simple_filtergraph(ist, ost);
2137                     if (configure_filtergraph(fg)) {
2138                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2139                         exit(1);
2140                     }
2141             }
2142
2143             if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2144                 if (ost->filter && !ost->frame_rate.num)
2145                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
2146                 if (ist && !ost->frame_rate.num)
2147                     ost->frame_rate = ist->framerate;
2148                 if (ist && !ost->frame_rate.num)
2149                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
2150 //                    ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
2151                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2152                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2153                     ost->frame_rate = ost->enc->supported_framerates[idx];
2154                 }
2155             }
2156
2157             switch (codec->codec_type) {
2158             case AVMEDIA_TYPE_AUDIO:
2159                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2160                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2161                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2162                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
2163                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2164                 break;
2165             case AVMEDIA_TYPE_VIDEO:
2166                 codec->time_base = av_inv_q(ost->frame_rate);
2167                 if (ost->filter && !(codec->time_base.num && codec->time_base.den))
2168                     codec->time_base = ost->filter->filter->inputs[0]->time_base;
2169                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
2170                    && (video_sync_method == VSYNC_CFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
2171                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
2172                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
2173                 }
2174                 for (j = 0; j < ost->forced_kf_count; j++)
2175                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
2176                                                          AV_TIME_BASE_Q,
2177                                                          codec->time_base);
2178
2179                 codec->width  = ost->filter->filter->inputs[0]->w;
2180                 codec->height = ost->filter->filter->inputs[0]->h;
2181                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2182                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
2183                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
2184                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2185                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2186
2187                 if (!icodec ||
2188                     codec->width   != icodec->width  ||
2189                     codec->height  != icodec->height ||
2190                     codec->pix_fmt != icodec->pix_fmt) {
2191                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
2192                 }
2193
2194                 if (ost->forced_keyframes)
2195                     parse_forced_key_frames(ost->forced_keyframes, ost,
2196                                             ost->st->codec);
2197                 break;
2198             case AVMEDIA_TYPE_SUBTITLE:
2199                 codec->time_base = (AVRational){1, 1000};
2200                 if (!codec->width) {
2201                     codec->width     = input_streams[ost->source_index]->st->codec->width;
2202                     codec->height    = input_streams[ost->source_index]->st->codec->height;
2203                 }
2204                 break;
2205             default:
2206                 abort();
2207                 break;
2208             }
2209             /* two pass mode */
2210             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
2211                 char logfilename[1024];
2212                 FILE *f;
2213
2214                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2215                          ost->logfile_prefix ? ost->logfile_prefix :
2216                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
2217                          i);
2218                 if (!strcmp(ost->enc->name, "libx264")) {
2219                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2220                 } else {
2221                     if (codec->flags & CODEC_FLAG_PASS2) {
2222                         char  *logbuffer;
2223                         size_t logbuffer_size;
2224                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2225                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2226                                    logfilename);
2227                             exit_program(1);
2228                         }
2229                         codec->stats_in = logbuffer;
2230                     }
2231                     if (codec->flags & CODEC_FLAG_PASS1) {
2232                         f = fopen(logfilename, "wb");
2233                         if (!f) {
2234                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2235                                 logfilename, strerror(errno));
2236                             exit_program(1);
2237                         }
2238                         ost->logfile = f;
2239                     }
2240                 }
2241             }
2242         }
2243     }
2244
2245     /* open each encoder */
2246     for (i = 0; i < nb_output_streams; i++) {
2247         ost = output_streams[i];
2248         if (ost->encoding_needed) {
2249             AVCodec      *codec = ost->enc;
2250             AVCodecContext *dec = NULL;
2251
2252             if ((ist = get_input_stream(ost)))
2253                 dec = ist->st->codec;
2254             if (dec && dec->subtitle_header) {
2255                 /* ASS code assumes this buffer is null terminated so add extra byte. */
2256                 ost->st->codec->subtitle_header = av_mallocz(dec->subtitle_header_size + 1);
2257                 if (!ost->st->codec->subtitle_header) {
2258                     ret = AVERROR(ENOMEM);
2259                     goto dump_format;
2260                 }
2261                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2262                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2263             }
2264             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2265                 av_dict_set(&ost->opts, "threads", "auto", 0);
2266             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
2267                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2268                         ost->file_index, ost->index);
2269                 ret = AVERROR(EINVAL);
2270                 goto dump_format;
2271             }
2272             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2273                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
2274                 av_buffersink_set_frame_size(ost->filter->filter,
2275                                              ost->st->codec->frame_size);
2276             assert_codec_experimental(ost->st->codec, 1);
2277             assert_avoptions(ost->opts);
2278             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2279                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2280                                              " It takes bits/s as argument, not kbits/s\n");
2281             extra_size += ost->st->codec->extradata_size;
2282
2283             if (ost->st->codec->me_threshold)
2284                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
2285         }
2286     }
2287
2288     /* init input streams */
2289     for (i = 0; i < nb_input_streams; i++)
2290         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
2291             goto dump_format;
2292
2293     /* discard unused programs */
2294     for (i = 0; i < nb_input_files; i++) {
2295         InputFile *ifile = input_files[i];
2296         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2297             AVProgram *p = ifile->ctx->programs[j];
2298             int discard  = AVDISCARD_ALL;
2299
2300             for (k = 0; k < p->nb_stream_indexes; k++)
2301                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
2302                     discard = AVDISCARD_DEFAULT;
2303                     break;
2304                 }
2305             p->discard = discard;
2306         }
2307     }
2308
2309     /* open files and write file headers */
2310     for (i = 0; i < nb_output_files; i++) {
2311         oc = output_files[i]->ctx;
2312         oc->interrupt_callback = int_cb;
2313         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
2314             char errbuf[128];
2315             const char *errbuf_ptr = errbuf;
2316             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
2317                 errbuf_ptr = strerror(AVUNERROR(ret));
2318             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
2319             ret = AVERROR(EINVAL);
2320             goto dump_format;
2321         }
2322 //         assert_avoptions(output_files[i]->opts);
2323         if (strcmp(oc->oformat->name, "rtp")) {
2324             want_sdp = 0;
2325         }
2326     }
2327
2328  dump_format:
2329     /* dump the file output parameters - cannot be done before in case
2330        of stream copy */
2331     for (i = 0; i < nb_output_files; i++) {
2332         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
2333     }
2334
2335     /* dump the stream mapping */
2336     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2337     for (i = 0; i < nb_input_streams; i++) {
2338         ist = input_streams[i];
2339
2340         for (j = 0; j < ist->nb_filters; j++) {
2341             if (ist->filters[j]->graph->graph_desc) {
2342                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
2343                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
2344                        ist->filters[j]->name);
2345                 if (nb_filtergraphs > 1)
2346                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
2347                 av_log(NULL, AV_LOG_INFO, "\n");
2348             }
2349         }
2350     }
2351
2352     for (i = 0; i < nb_output_streams; i++) {
2353         ost = output_streams[i];
2354
2355         if (ost->attachment_filename) {
2356             /* an attached file */
2357             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2358                    ost->attachment_filename, ost->file_index, ost->index);
2359             continue;
2360         }
2361
2362         if (ost->filter && ost->filter->graph->graph_desc) {
2363             /* output from a complex graph */
2364             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
2365             if (nb_filtergraphs > 1)
2366                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
2367
2368             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
2369                    ost->index, ost->enc ? ost->enc->name : "?");
2370             continue;
2371         }
2372
2373         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2374                input_streams[ost->source_index]->file_index,
2375                input_streams[ost->source_index]->st->index,
2376                ost->file_index,
2377                ost->index);
2378         if (ost->sync_ist != input_streams[ost->source_index])
2379             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2380                    ost->sync_ist->file_index,
2381                    ost->sync_ist->st->index);
2382         if (ost->stream_copy)
2383             av_log(NULL, AV_LOG_INFO, " (copy)");
2384         else
2385             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
2386                    input_streams[ost->source_index]->dec->name : "?",
2387                    ost->enc ? ost->enc->name : "?");
2388         av_log(NULL, AV_LOG_INFO, "\n");
2389     }
2390
2391     if (ret) {
2392         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2393         return ret;
2394     }
2395
2396     if (want_sdp) {
2397         print_sdp();
2398     }
2399
2400     return 0;
2401 }
2402
2403 /**
2404  * @return 1 if there are still streams where more output is wanted,
2405  *         0 otherwise
2406  */
2407 static int need_output(void)
2408 {
2409     int i;
2410
2411     for (i = 0; i < nb_output_streams; i++) {
2412         OutputStream *ost    = output_streams[i];
2413         OutputFile *of       = output_files[ost->file_index];
2414         AVFormatContext *os  = output_files[ost->file_index]->ctx;
2415
2416         if (ost->finished ||
2417             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2418             continue;
2419         if (ost->frame_number >= ost->max_frames) {
2420             int j;
2421             for (j = 0; j < of->ctx->nb_streams; j++)
2422                 close_output_stream(output_streams[of->ost_index + j]);
2423             continue;
2424         }
2425
2426         return 1;
2427     }
2428
2429     return 0;
2430 }
2431
2432 /**
2433  * Select the output stream to process.
2434  *
2435  * @return  selected output stream, or NULL if none available
2436  */
2437 static OutputStream *choose_output(void)
2438 {
2439     int i;
2440     int64_t opts_min = INT64_MAX;
2441     OutputStream *ost_min = NULL;
2442
2443     for (i = 0; i < nb_output_streams; i++) {
2444         OutputStream *ost = output_streams[i];
2445         int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
2446                                     AV_TIME_BASE_Q);
2447         if (!ost->unavailable && !ost->finished && opts < opts_min) {
2448             opts_min = opts;
2449             ost_min  = ost;
2450         }
2451     }
2452     return ost_min;
2453 }
2454
2455 static int check_keyboard_interaction(int64_t cur_time)
2456 {
2457     int i, ret, key;
2458     static int64_t last_time;
2459     if (received_nb_signals)
2460         return AVERROR_EXIT;
2461     /* read_key() returns 0 on EOF */
2462     if(cur_time - last_time >= 100000 && !run_as_daemon){
2463         key =  read_key();
2464         last_time = cur_time;
2465     }else
2466         key = -1;
2467     if (key == 'q')
2468         return AVERROR_EXIT;
2469     if (key == '+') av_log_set_level(av_log_get_level()+10);
2470     if (key == '-') av_log_set_level(av_log_get_level()-10);
2471     if (key == 's') qp_hist     ^= 1;
2472     if (key == 'h'){
2473         if (do_hex_dump){
2474             do_hex_dump = do_pkt_dump = 0;
2475         } else if(do_pkt_dump){
2476             do_hex_dump = 1;
2477         } else
2478             do_pkt_dump = 1;
2479         av_log_set_level(AV_LOG_DEBUG);
2480     }
2481     if (key == 'c' || key == 'C'){
2482         char buf[4096], target[64], command[256], arg[256] = {0};
2483         double time;
2484         int k, n = 0;
2485         fprintf(stderr, "\nEnter command: <target> <time> <command>[ <argument>]\n");
2486         i = 0;
2487         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
2488             if (k > 0)
2489                 buf[i++] = k;
2490         buf[i] = 0;
2491         if (k > 0 &&
2492             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
2493             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
2494                    target, time, command, arg);
2495             for (i = 0; i < nb_filtergraphs; i++) {
2496                 FilterGraph *fg = filtergraphs[i];
2497                 if (fg->graph) {
2498                     if (time < 0) {
2499                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
2500                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
2501                         fprintf(stderr, "Command reply for stream %d: ret:%d res:%s\n", i, ret, buf);
2502                     } else {
2503                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
2504                     }
2505                 }
2506             }
2507         } else {
2508             av_log(NULL, AV_LOG_ERROR,
2509                    "Parse error, at least 3 arguments were expected, "
2510                    "only %d given in string '%s'\n", n, buf);
2511         }
2512     }
2513     if (key == 'd' || key == 'D'){
2514         int debug=0;
2515         if(key == 'D') {
2516             debug = input_streams[0]->st->codec->debug<<1;
2517             if(!debug) debug = 1;
2518             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
2519                 debug += debug;
2520         }else
2521             if(scanf("%d", &debug)!=1)
2522                 fprintf(stderr,"error parsing debug value\n");
2523         for(i=0;i<nb_input_streams;i++) {
2524             input_streams[i]->st->codec->debug = debug;
2525         }
2526         for(i=0;i<nb_output_streams;i++) {
2527             OutputStream *ost = output_streams[i];
2528             ost->st->codec->debug = debug;
2529         }
2530         if(debug) av_log_set_level(AV_LOG_DEBUG);
2531         fprintf(stderr,"debug=%d\n", debug);
2532     }
2533     if (key == '?'){
2534         fprintf(stderr, "key    function\n"
2535                         "?      show this help\n"
2536                         "+      increase verbosity\n"
2537                         "-      decrease verbosity\n"
2538                         "c      Send command to filtergraph\n"
2539                         "D      cycle through available debug modes\n"
2540                         "h      dump packets/hex press to cycle through the 3 states\n"
2541                         "q      quit\n"
2542                         "s      Show QP histogram\n"
2543         );
2544     }
2545     return 0;
2546 }
2547
2548 #if HAVE_PTHREADS
2549 static void *input_thread(void *arg)
2550 {
2551     InputFile *f = arg;
2552     int ret = 0;
2553
2554     while (!transcoding_finished && ret >= 0) {
2555         AVPacket pkt;
2556         ret = av_read_frame(f->ctx, &pkt);
2557
2558         if (ret == AVERROR(EAGAIN)) {
2559             av_usleep(10000);
2560             ret = 0;
2561             continue;
2562         } else if (ret < 0)
2563             break;
2564
2565         pthread_mutex_lock(&f->fifo_lock);
2566         while (!av_fifo_space(f->fifo))
2567             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2568
2569         av_dup_packet(&pkt);
2570         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2571
2572         pthread_mutex_unlock(&f->fifo_lock);
2573     }
2574
2575     f->finished = 1;
2576     return NULL;
2577 }
2578
2579 static void free_input_threads(void)
2580 {
2581     int i;
2582
2583     if (nb_input_files == 1)
2584         return;
2585
2586     transcoding_finished = 1;
2587
2588     for (i = 0; i < nb_input_files; i++) {
2589         InputFile *f = input_files[i];
2590         AVPacket pkt;
2591
2592         if (!f->fifo || f->joined)
2593             continue;
2594
2595         pthread_mutex_lock(&f->fifo_lock);
2596         while (av_fifo_size(f->fifo)) {
2597             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2598             av_free_packet(&pkt);
2599         }
2600         pthread_cond_signal(&f->fifo_cond);
2601         pthread_mutex_unlock(&f->fifo_lock);
2602
2603         pthread_join(f->thread, NULL);
2604         f->joined = 1;
2605
2606         while (av_fifo_size(f->fifo)) {
2607             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2608             av_free_packet(&pkt);
2609         }
2610         av_fifo_free(f->fifo);
2611     }
2612 }
2613
2614 static int init_input_threads(void)
2615 {
2616     int i, ret;
2617
2618     if (nb_input_files == 1)
2619         return 0;
2620
2621     for (i = 0; i < nb_input_files; i++) {
2622         InputFile *f = input_files[i];
2623
2624         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2625             return AVERROR(ENOMEM);
2626
2627         pthread_mutex_init(&f->fifo_lock, NULL);
2628         pthread_cond_init (&f->fifo_cond, NULL);
2629
2630         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2631             return AVERROR(ret);
2632     }
2633     return 0;
2634 }
2635
2636 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2637 {
2638     int ret = 0;
2639
2640     pthread_mutex_lock(&f->fifo_lock);
2641
2642     if (av_fifo_size(f->fifo)) {
2643         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2644         pthread_cond_signal(&f->fifo_cond);
2645     } else {
2646         if (f->finished)
2647             ret = AVERROR_EOF;
2648         else
2649             ret = AVERROR(EAGAIN);
2650     }
2651
2652     pthread_mutex_unlock(&f->fifo_lock);
2653
2654     return ret;
2655 }
2656 #endif
2657
2658 static int get_input_packet(InputFile *f, AVPacket *pkt)
2659 {
2660 #if HAVE_PTHREADS
2661     if (nb_input_files > 1)
2662         return get_input_packet_mt(f, pkt);
2663 #endif
2664     return av_read_frame(f->ctx, pkt);
2665 }
2666
2667 static int got_eagain(void)
2668 {
2669     int i;
2670     for (i = 0; i < nb_output_streams; i++)
2671         if (output_streams[i]->unavailable)
2672             return 1;
2673     return 0;
2674 }
2675
2676 static void reset_eagain(void)
2677 {
2678     int i;
2679     for (i = 0; i < nb_input_files; i++)
2680         input_files[i]->eagain = 0;
2681     for (i = 0; i < nb_output_streams; i++)
2682         output_streams[i]->unavailable = 0;
2683 }
2684
2685 /**
2686  * @return
2687  * - 0 -- one packet was read and processed
2688  * - AVERROR(EAGAIN) -- no packets were available for selected file,
2689  *   this function should be called again
2690  * - AVERROR_EOF -- this function should not be called again
2691  */
2692 static int process_input(int file_index)
2693 {
2694     InputFile *ifile = input_files[file_index];
2695     AVFormatContext *is;
2696     InputStream *ist;
2697     AVPacket pkt;
2698     int ret, i, j;
2699
2700     is  = ifile->ctx;
2701     ret = get_input_packet(ifile, &pkt);
2702
2703     if (ret == AVERROR(EAGAIN)) {
2704         ifile->eagain = 1;
2705         return ret;
2706     }
2707     if (ret < 0) {
2708         if (ret != AVERROR_EOF) {
2709             print_error(is->filename, ret);
2710             if (exit_on_error)
2711                 exit_program(1);
2712         }
2713         ifile->eof_reached = 1;
2714
2715         for (i = 0; i < ifile->nb_streams; i++) {
2716             ist = input_streams[ifile->ist_index + i];
2717             if (ist->decoding_needed)
2718                 output_packet(ist, NULL);
2719
2720             /* mark all outputs that don't go through lavfi as finished */
2721             for (j = 0; j < nb_output_streams; j++) {
2722                 OutputStream *ost = output_streams[j];
2723
2724                 if (ost->source_index == ifile->ist_index + i &&
2725                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
2726                     close_output_stream(ost);
2727             }
2728         }
2729
2730         return AVERROR(EAGAIN);
2731     }
2732
2733     reset_eagain();
2734
2735     if (do_pkt_dump) {
2736         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2737                          is->streams[pkt.stream_index]);
2738     }
2739     /* the following test is needed in case new streams appear
2740        dynamically in stream : we ignore them */
2741     if (pkt.stream_index >= ifile->nb_streams) {
2742         report_new_stream(file_index, &pkt);
2743         goto discard_packet;
2744     }
2745
2746     ist = input_streams[ifile->ist_index + pkt.stream_index];
2747     if (ist->discard)
2748         goto discard_packet;
2749
2750     if(!ist->wrap_correction_done && input_files[file_index]->ctx->start_time != AV_NOPTS_VALUE && ist->st->pts_wrap_bits < 64){
2751         int64_t stime = av_rescale_q(input_files[file_index]->ctx->start_time, AV_TIME_BASE_Q, ist->st->time_base);
2752         int64_t stime2= stime + (1ULL<<ist->st->pts_wrap_bits);
2753         ist->wrap_correction_done = 1;
2754
2755         if(stime2 > stime && pkt.dts != AV_NOPTS_VALUE && pkt.dts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
2756             pkt.dts -= 1ULL<<ist->st->pts_wrap_bits;
2757             ist->wrap_correction_done = 0;
2758         }
2759         if(stime2 > stime && pkt.pts != AV_NOPTS_VALUE && pkt.pts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
2760             pkt.pts -= 1ULL<<ist->st->pts_wrap_bits;
2761             ist->wrap_correction_done = 0;
2762         }
2763     }
2764
2765     if (pkt.dts != AV_NOPTS_VALUE)
2766         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2767     if (pkt.pts != AV_NOPTS_VALUE)
2768         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2769
2770     if (pkt.pts != AV_NOPTS_VALUE)
2771         pkt.pts *= ist->ts_scale;
2772     if (pkt.dts != AV_NOPTS_VALUE)
2773         pkt.dts *= ist->ts_scale;
2774
2775     if (debug_ts) {
2776         av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
2777                 "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",
2778                 ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->st->codec->codec_type),
2779                 av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &AV_TIME_BASE_Q),
2780                 av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &AV_TIME_BASE_Q),
2781                 av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
2782                 av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
2783                 input_files[ist->file_index]->ts_offset);
2784     }
2785
2786     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
2787         !copy_ts) {
2788         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2789         int64_t delta   = pkt_dts - ist->next_dts;
2790         if (is->iformat->flags & AVFMT_TS_DISCONT) {
2791         if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
2792             (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
2793                 ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
2794             pkt_dts+1<ist->pts){
2795             ifile->ts_offset -= delta;
2796             av_log(NULL, AV_LOG_DEBUG,
2797                    "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2798                    delta, ifile->ts_offset);
2799             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2800             if (pkt.pts != AV_NOPTS_VALUE)
2801                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2802         }
2803         } else {
2804             if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
2805                 (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
2806                ) {
2807                 av_log(NULL, AV_LOG_WARNING, "DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n", pkt.dts, ist->next_dts, pkt.stream_index);
2808                 pkt.dts = AV_NOPTS_VALUE;
2809             }
2810             if (pkt.pts != AV_NOPTS_VALUE){
2811                 int64_t pkt_pts = av_rescale_q(pkt.pts, ist->st->time_base, AV_TIME_BASE_Q);
2812                 delta   = pkt_pts - ist->next_dts;
2813                 if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
2814                     (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
2815                    ) {
2816                     av_log(NULL, AV_LOG_WARNING, "PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n", pkt.pts, ist->next_dts, pkt.stream_index);
2817                     pkt.pts = AV_NOPTS_VALUE;
2818                 }
2819             }
2820         }
2821     }
2822
2823     sub2video_heartbeat(ist, pkt.pts);
2824
2825     ret = output_packet(ist, &pkt);
2826     if (ret < 0) {
2827         char buf[128];
2828         av_strerror(ret, buf, sizeof(buf));
2829         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d: %s\n",
2830                 ist->file_index, ist->st->index, buf);
2831         if (exit_on_error)
2832             exit_program(1);
2833     }
2834
2835 discard_packet:
2836     av_free_packet(&pkt);
2837
2838     return 0;
2839 }
2840
2841 /**
2842  * Perform a step of transcoding for the specified filter graph.
2843  *
2844  * @param[in]  graph     filter graph to consider
2845  * @param[out] best_ist  input stream where a frame would allow to continue
2846  * @return  0 for success, <0 for error
2847  */
2848 static int transcode_from_filter(FilterGraph *graph, InputStream **best_ist)
2849 {
2850     int i, ret;
2851     int nb_requests, nb_requests_max = 0;
2852     InputFilter *ifilter;
2853     InputStream *ist;
2854
2855     *best_ist = NULL;
2856     ret = avfilter_graph_request_oldest(graph->graph);
2857     if (ret >= 0)
2858         return reap_filters();
2859
2860     if (ret == AVERROR_EOF) {
2861         ret = reap_filters();
2862         for (i = 0; i < graph->nb_outputs; i++)
2863             close_output_stream(graph->outputs[i]->ost);
2864         return ret;
2865     }
2866     if (ret != AVERROR(EAGAIN))
2867         return ret;
2868
2869     for (i = 0; i < graph->nb_inputs; i++) {
2870         ifilter = graph->inputs[i];
2871         ist = ifilter->ist;
2872         if (input_files[ist->file_index]->eagain ||
2873             input_files[ist->file_index]->eof_reached)
2874             continue;
2875         nb_requests = av_buffersrc_get_nb_failed_requests(ifilter->filter);
2876         if (nb_requests > nb_requests_max) {
2877             nb_requests_max = nb_requests;
2878             *best_ist = ist;
2879         }
2880     }
2881
2882     if (!*best_ist)
2883         for (i = 0; i < graph->nb_outputs; i++)
2884             graph->outputs[i]->ost->unavailable = 1;
2885
2886     return 0;
2887 }
2888
2889 /**
2890  * Run a single step of transcoding.
2891  *
2892  * @return  0 for success, <0 for error
2893  */
2894 static int transcode_step(void)
2895 {
2896     OutputStream *ost;
2897     InputStream  *ist;
2898     int ret;
2899
2900     ost = choose_output();
2901     if (!ost) {
2902         if (got_eagain()) {
2903             reset_eagain();
2904             av_usleep(10000);
2905             return 0;
2906         }
2907         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
2908         return AVERROR_EOF;
2909     }
2910
2911     if (ost->filter) {
2912         if ((ret = transcode_from_filter(ost->filter->graph, &ist)) < 0)
2913             return ret;
2914         if (!ist)
2915             return 0;
2916     } else {
2917         av_assert0(ost->source_index >= 0);
2918         ist = input_streams[ost->source_index];
2919     }
2920
2921     ret = process_input(ist->file_index);
2922     if (ret == AVERROR(EAGAIN)) {
2923         if (input_files[ist->file_index]->eagain)
2924             ost->unavailable = 1;
2925         return 0;
2926     }
2927     if (ret < 0)
2928         return ret == AVERROR_EOF ? 0 : ret;
2929
2930     return reap_filters();
2931 }
2932
2933 /*
2934  * The following code is the main loop of the file converter
2935  */
2936 static int transcode(void)
2937 {
2938     int ret, i;
2939     AVFormatContext *os;
2940     OutputStream *ost;
2941     InputStream *ist;
2942     int64_t timer_start;
2943
2944     ret = transcode_init();
2945     if (ret < 0)
2946         goto fail;
2947
2948     if (stdin_interaction) {
2949         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
2950     }
2951
2952     timer_start = av_gettime();
2953
2954 #if HAVE_PTHREADS
2955     if ((ret = init_input_threads()) < 0)
2956         goto fail;
2957 #endif
2958
2959     while (!received_sigterm) {
2960         int64_t cur_time= av_gettime();
2961
2962         /* if 'q' pressed, exits */
2963         if (stdin_interaction)
2964             if (check_keyboard_interaction(cur_time) < 0)
2965                 break;
2966
2967         /* check if there's any stream where output is still needed */
2968         if (!need_output()) {
2969             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2970             break;
2971         }
2972
2973         ret = transcode_step();
2974         if (ret < 0) {
2975             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
2976                 continue;
2977
2978             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
2979             break;
2980         }
2981
2982         /* dump report by using the output first video and audio streams */
2983         print_report(0, timer_start, cur_time);
2984     }
2985 #if HAVE_PTHREADS
2986     free_input_threads();
2987 #endif
2988
2989     /* at the end of stream, we must flush the decoder buffers */
2990     for (i = 0; i < nb_input_streams; i++) {
2991         ist = input_streams[i];
2992         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
2993             output_packet(ist, NULL);
2994         }
2995     }
2996     flush_encoders();
2997
2998     term_exit();
2999
3000     /* write the trailer if needed and close file */
3001     for (i = 0; i < nb_output_files; i++) {
3002         os = output_files[i]->ctx;
3003         av_write_trailer(os);
3004     }
3005
3006     /* dump report by using the first video and audio streams */
3007     print_report(1, timer_start, av_gettime());
3008
3009     /* close each encoder */
3010     for (i = 0; i < nb_output_streams; i++) {
3011         ost = output_streams[i];
3012         if (ost->encoding_needed) {
3013             av_freep(&ost->st->codec->stats_in);
3014             avcodec_close(ost->st->codec);
3015         }
3016     }
3017
3018     /* close each decoder */
3019     for (i = 0; i < nb_input_streams; i++) {
3020         ist = input_streams[i];
3021         if (ist->decoding_needed) {
3022             avcodec_close(ist->st->codec);
3023         }
3024     }
3025
3026     /* finished ! */
3027     ret = 0;
3028
3029  fail:
3030 #if HAVE_PTHREADS
3031     free_input_threads();
3032 #endif
3033
3034     if (output_streams) {
3035         for (i = 0; i < nb_output_streams; i++) {
3036             ost = output_streams[i];
3037             if (ost) {
3038                 if (ost->stream_copy)
3039                     av_freep(&ost->st->codec->extradata);
3040                 if (ost->logfile) {
3041                     fclose(ost->logfile);
3042                     ost->logfile = NULL;
3043                 }
3044                 av_freep(&ost->st->codec->subtitle_header);
3045                 av_free(ost->forced_kf_pts);
3046                 av_dict_free(&ost->opts);
3047             }
3048         }
3049     }
3050     return ret;
3051 }
3052
3053
3054 static int64_t getutime(void)
3055 {
3056 #if HAVE_GETRUSAGE
3057     struct rusage rusage;
3058
3059     getrusage(RUSAGE_SELF, &rusage);
3060     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
3061 #elif HAVE_GETPROCESSTIMES
3062     HANDLE proc;
3063     FILETIME c, e, k, u;
3064     proc = GetCurrentProcess();
3065     GetProcessTimes(proc, &c, &e, &k, &u);
3066     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
3067 #else
3068     return av_gettime();
3069 #endif
3070 }
3071
3072 static int64_t getmaxrss(void)
3073 {
3074 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
3075     struct rusage rusage;
3076     getrusage(RUSAGE_SELF, &rusage);
3077     return (int64_t)rusage.ru_maxrss * 1024;
3078 #elif HAVE_GETPROCESSMEMORYINFO
3079     HANDLE proc;
3080     PROCESS_MEMORY_COUNTERS memcounters;
3081     proc = GetCurrentProcess();
3082     memcounters.cb = sizeof(memcounters);
3083     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
3084     return memcounters.PeakPagefileUsage;
3085 #else
3086     return 0;
3087 #endif
3088 }
3089
3090 static void log_callback_null(void *ptr, int level, const char *fmt, va_list vl)
3091 {
3092 }
3093
3094 static void parse_cpuflags(int argc, char **argv, const OptionDef *options)
3095 {
3096     int idx = locate_option(argc, argv, options, "cpuflags");
3097     if (idx && argv[idx + 1])
3098         opt_cpuflags(NULL, "cpuflags", argv[idx + 1]);
3099 }
3100
3101 int main(int argc, char **argv)
3102 {
3103     OptionsContext o = { 0 };
3104     int64_t ti;
3105
3106     reset_options(&o, 0);
3107
3108     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3109     parse_loglevel(argc, argv, options);
3110
3111     if(argc>1 && !strcmp(argv[1], "-d")){
3112         run_as_daemon=1;
3113         av_log_set_callback(log_callback_null);
3114         argc--;
3115         argv++;
3116     }
3117
3118     avcodec_register_all();
3119 #if CONFIG_AVDEVICE
3120     avdevice_register_all();
3121 #endif
3122     avfilter_register_all();
3123     av_register_all();
3124     avformat_network_init();
3125
3126     show_banner(argc, argv, options);
3127
3128     term_init();
3129
3130     parse_cpuflags(argc, argv, options);
3131
3132     /* parse options */
3133     parse_options(&o, argc, argv, options, opt_output_file);
3134
3135     if (nb_output_files <= 0 && nb_input_files == 0) {
3136         show_usage();
3137         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3138         exit_program(1);
3139     }
3140
3141     /* file converter / grab */
3142     if (nb_output_files <= 0) {
3143         av_log(NULL, AV_LOG_FATAL, "At least one output file must be specified\n");
3144         exit_program(1);
3145     }
3146
3147 //     if (nb_input_files == 0) {
3148 //         av_log(NULL, AV_LOG_FATAL, "At least one input file must be specified\n");
3149 //         exit_program(1);
3150 //     }
3151
3152     current_time = ti = getutime();
3153     if (transcode() < 0)
3154         exit_program(1);
3155     ti = getutime() - ti;
3156     if (do_benchmark) {
3157         int maxrss = getmaxrss() / 1024;
3158         printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
3159     }
3160
3161     exit_program(0);
3162     return 0;
3163 }