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