592e9a8aba783a8525421aac201e54af0cf01609
[ffmpeg.git] / avconv.c
1 /*
2  * avconv main
3  * Copyright (c) 2000-2011 The libav developers.
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 #include "config.h"
23 #include <ctype.h>
24 #include <string.h>
25 #include <math.h>
26 #include <stdlib.h>
27 #include <errno.h>
28 #include <signal.h>
29 #include <limits.h>
30 #include "libavformat/avformat.h"
31 #include "libavdevice/avdevice.h"
32 #include "libswscale/swscale.h"
33 #include "libavresample/avresample.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/audioconvert.h"
36 #include "libavutil/parseutils.h"
37 #include "libavutil/samplefmt.h"
38 #include "libavutil/colorspace.h"
39 #include "libavutil/fifo.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/dict.h"
42 #include "libavutil/mathematics.h"
43 #include "libavutil/pixdesc.h"
44 #include "libavutil/avstring.h"
45 #include "libavutil/libm.h"
46 #include "libavutil/imgutils.h"
47 #include "libavutil/time.h"
48 #include "libavformat/os_support.h"
49
50 # include "libavfilter/avfilter.h"
51 # include "libavfilter/avfiltergraph.h"
52 # include "libavfilter/buffersrc.h"
53 # include "libavfilter/buffersink.h"
54
55 #if HAVE_SYS_RESOURCE_H
56 #include <sys/types.h>
57 #include <sys/resource.h>
58 #elif HAVE_GETPROCESSTIMES
59 #include <windows.h>
60 #endif
61 #if HAVE_GETPROCESSMEMORYINFO
62 #include <windows.h>
63 #include <psapi.h>
64 #endif
65
66 #if HAVE_SYS_SELECT_H
67 #include <sys/select.h>
68 #endif
69
70 #if HAVE_PTHREADS
71 #include <pthread.h>
72 #endif
73
74 #include <time.h>
75
76 #include "avconv.h"
77 #include "cmdutils.h"
78
79 #include "libavutil/avassert.h"
80
81 const char program_name[] = "avconv";
82 const int program_birth_year = 2000;
83
84 static FILE *vstats_file;
85
86 static int64_t video_size = 0;
87 static int64_t audio_size = 0;
88 static int64_t extra_size = 0;
89 static int nb_frames_dup = 0;
90 static int nb_frames_drop = 0;
91
92
93
94 #if HAVE_PTHREADS
95 /* signal to input threads that they should exit; set by the main thread */
96 static int transcoding_finished;
97 #endif
98
99 #define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
100
101 InputStream **input_streams = NULL;
102 int        nb_input_streams = 0;
103 InputFile   **input_files   = NULL;
104 int        nb_input_files   = 0;
105
106 OutputStream **output_streams = NULL;
107 int         nb_output_streams = 0;
108 OutputFile   **output_files   = NULL;
109 int         nb_output_files   = 0;
110
111 FilterGraph **filtergraphs;
112 int        nb_filtergraphs;
113
114 static void term_exit(void)
115 {
116     av_log(NULL, AV_LOG_QUIET, "");
117 }
118
119 static volatile int received_sigterm = 0;
120 static volatile int received_nb_signals = 0;
121
122 static void
123 sigterm_handler(int sig)
124 {
125     received_sigterm = sig;
126     received_nb_signals++;
127     term_exit();
128 }
129
130 static void term_init(void)
131 {
132     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
133     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
134 #ifdef SIGXCPU
135     signal(SIGXCPU, sigterm_handler);
136 #endif
137 }
138
139 static int decode_interrupt_cb(void *ctx)
140 {
141     return received_nb_signals > 1;
142 }
143
144 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
145
146 void exit_program(int ret)
147 {
148     int i, j;
149
150     for (i = 0; i < nb_filtergraphs; i++) {
151         avfilter_graph_free(&filtergraphs[i]->graph);
152         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
153             av_freep(&filtergraphs[i]->inputs[j]->name);
154             av_freep(&filtergraphs[i]->inputs[j]);
155         }
156         av_freep(&filtergraphs[i]->inputs);
157         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
158             av_freep(&filtergraphs[i]->outputs[j]->name);
159             av_freep(&filtergraphs[i]->outputs[j]);
160         }
161         av_freep(&filtergraphs[i]->outputs);
162         av_freep(&filtergraphs[i]);
163     }
164     av_freep(&filtergraphs);
165
166     /* close files */
167     for (i = 0; i < nb_output_files; i++) {
168         AVFormatContext *s = output_files[i]->ctx;
169         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
170             avio_close(s->pb);
171         avformat_free_context(s);
172         av_dict_free(&output_files[i]->opts);
173         av_freep(&output_files[i]);
174     }
175     for (i = 0; i < nb_output_streams; i++) {
176         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
177         while (bsfc) {
178             AVBitStreamFilterContext *next = bsfc->next;
179             av_bitstream_filter_close(bsfc);
180             bsfc = next;
181         }
182         output_streams[i]->bitstream_filters = NULL;
183
184         av_freep(&output_streams[i]->forced_keyframes);
185         av_freep(&output_streams[i]->avfilter);
186         av_freep(&output_streams[i]->filtered_frame);
187         av_freep(&output_streams[i]);
188     }
189     for (i = 0; i < nb_input_files; i++) {
190         avformat_close_input(&input_files[i]->ctx);
191         av_freep(&input_files[i]);
192     }
193     for (i = 0; i < nb_input_streams; i++) {
194         av_freep(&input_streams[i]->decoded_frame);
195         av_dict_free(&input_streams[i]->opts);
196         free_buffer_pool(&input_streams[i]->buffer_pool);
197         av_freep(&input_streams[i]->filters);
198         av_freep(&input_streams[i]);
199     }
200
201     if (vstats_file)
202         fclose(vstats_file);
203     av_free(vstats_filename);
204
205     av_freep(&input_streams);
206     av_freep(&input_files);
207     av_freep(&output_streams);
208     av_freep(&output_files);
209
210     uninit_opts();
211
212     avfilter_uninit();
213     avformat_network_deinit();
214
215     if (received_sigterm) {
216         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
217                (int) received_sigterm);
218         exit (255);
219     }
220
221     exit(ret);
222 }
223
224 void assert_avoptions(AVDictionary *m)
225 {
226     AVDictionaryEntry *t;
227     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
228         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
229         exit_program(1);
230     }
231 }
232
233 static void assert_codec_experimental(AVCodecContext *c, int encoder)
234 {
235     const char *codec_string = encoder ? "encoder" : "decoder";
236     AVCodec *codec;
237     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
238         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
239         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
240                 "results.\nAdd '-strict experimental' if you want to use it.\n",
241                 codec_string, c->codec->name);
242         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
243         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
244             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
245                    codec_string, codec->name);
246         exit_program(1);
247     }
248 }
249
250 /**
251  * Update the requested input sample format based on the output sample format.
252  * This is currently only used to request float output from decoders which
253  * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
254  * Ideally this will be removed in the future when decoders do not do format
255  * conversion and only output in their native format.
256  */
257 static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
258                               AVCodecContext *enc)
259 {
260     /* if sample formats match or a decoder sample format has already been
261        requested, just return */
262     if (enc->sample_fmt == dec->sample_fmt ||
263         dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
264         return;
265
266     /* if decoder supports more than one output format */
267     if (dec_codec && dec_codec->sample_fmts &&
268         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
269         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
270         const enum AVSampleFormat *p;
271         int min_dec = -1, min_inc = -1;
272
273         /* find a matching sample format in the encoder */
274         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
275             if (*p == enc->sample_fmt) {
276                 dec->request_sample_fmt = *p;
277                 return;
278             } else if (*p > enc->sample_fmt) {
279                 min_inc = FFMIN(min_inc, *p - enc->sample_fmt);
280             } else
281                 min_dec = FFMIN(min_dec, enc->sample_fmt - *p);
282         }
283
284         /* if none match, provide the one that matches quality closest */
285         dec->request_sample_fmt = min_inc > 0 ? enc->sample_fmt + min_inc :
286                                   enc->sample_fmt - min_dec;
287     }
288 }
289
290 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
291 {
292     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
293     AVCodecContext          *avctx = ost->st->codec;
294     int ret;
295
296     /*
297      * Audio encoders may split the packets --  #frames in != #packets out.
298      * But there is no reordering, so we can limit the number of output packets
299      * by simply dropping them here.
300      * Counting encoded video frames needs to be done separately because of
301      * reordering, see do_video_out()
302      */
303     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
304         if (ost->frame_number >= ost->max_frames) {
305             av_free_packet(pkt);
306             return;
307         }
308         ost->frame_number++;
309     }
310
311     while (bsfc) {
312         AVPacket new_pkt = *pkt;
313         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
314                                            &new_pkt.data, &new_pkt.size,
315                                            pkt->data, pkt->size,
316                                            pkt->flags & AV_PKT_FLAG_KEY);
317         if (a > 0) {
318             av_free_packet(pkt);
319             new_pkt.destruct = av_destruct_packet;
320         } else if (a < 0) {
321             av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
322                    bsfc->filter->name, pkt->stream_index,
323                    avctx->codec ? avctx->codec->name : "copy");
324             print_error("", a);
325             if (exit_on_error)
326                 exit_program(1);
327         }
328         *pkt = new_pkt;
329
330         bsfc = bsfc->next;
331     }
332
333     pkt->stream_index = ost->index;
334     ret = av_interleaved_write_frame(s, pkt);
335     if (ret < 0) {
336         print_error("av_interleaved_write_frame()", ret);
337         exit_program(1);
338     }
339 }
340
341 static int check_recording_time(OutputStream *ost)
342 {
343     OutputFile *of = output_files[ost->file_index];
344
345     if (of->recording_time != INT64_MAX &&
346         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
347                       AV_TIME_BASE_Q) >= 0) {
348         ost->finished = 1;
349         return 0;
350     }
351     return 1;
352 }
353
354 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
355                          AVFrame *frame)
356 {
357     AVCodecContext *enc = ost->st->codec;
358     AVPacket pkt;
359     int got_packet = 0;
360
361     av_init_packet(&pkt);
362     pkt.data = NULL;
363     pkt.size = 0;
364
365     if (!check_recording_time(ost))
366         return;
367
368     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
369         frame->pts = ost->sync_opts;
370     ost->sync_opts = frame->pts + frame->nb_samples;
371
372     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
373         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
374         exit_program(1);
375     }
376
377     if (got_packet) {
378         if (pkt.pts != AV_NOPTS_VALUE)
379             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
380         if (pkt.dts != AV_NOPTS_VALUE)
381             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
382         if (pkt.duration > 0)
383             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
384
385         write_frame(s, &pkt, ost);
386
387         audio_size += pkt.size;
388     }
389 }
390
391 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
392 {
393     AVCodecContext *dec;
394     AVPicture *picture2;
395     AVPicture picture_tmp;
396     uint8_t *buf = 0;
397
398     dec = ist->st->codec;
399
400     /* deinterlace : must be done before any resize */
401     if (do_deinterlace) {
402         int size;
403
404         /* create temporary picture */
405         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
406         buf  = av_malloc(size);
407         if (!buf)
408             return;
409
410         picture2 = &picture_tmp;
411         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
412
413         if (avpicture_deinterlace(picture2, picture,
414                                  dec->pix_fmt, dec->width, dec->height) < 0) {
415             /* if error, do not deinterlace */
416             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
417             av_free(buf);
418             buf = NULL;
419             picture2 = picture;
420         }
421     } else {
422         picture2 = picture;
423     }
424
425     if (picture != picture2)
426         *picture = *picture2;
427     *bufp = buf;
428 }
429
430 static void do_subtitle_out(AVFormatContext *s,
431                             OutputStream *ost,
432                             InputStream *ist,
433                             AVSubtitle *sub,
434                             int64_t pts)
435 {
436     static uint8_t *subtitle_out = NULL;
437     int subtitle_out_max_size = 1024 * 1024;
438     int subtitle_out_size, nb, i;
439     AVCodecContext *enc;
440     AVPacket pkt;
441
442     if (pts == AV_NOPTS_VALUE) {
443         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
444         if (exit_on_error)
445             exit_program(1);
446         return;
447     }
448
449     enc = ost->st->codec;
450
451     if (!subtitle_out) {
452         subtitle_out = av_malloc(subtitle_out_max_size);
453     }
454
455     /* Note: DVB subtitle need one packet to draw them and one other
456        packet to clear them */
457     /* XXX: signal it in the codec context ? */
458     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
459         nb = 2;
460     else
461         nb = 1;
462
463     for (i = 0; i < nb; i++) {
464         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
465         if (!check_recording_time(ost))
466             return;
467
468         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
469         // start_display_time is required to be 0
470         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
471         sub->end_display_time  -= sub->start_display_time;
472         sub->start_display_time = 0;
473         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
474                                                     subtitle_out_max_size, sub);
475         if (subtitle_out_size < 0) {
476             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
477             exit_program(1);
478         }
479
480         av_init_packet(&pkt);
481         pkt.data = subtitle_out;
482         pkt.size = subtitle_out_size;
483         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
484         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
485             /* XXX: the pts correction is handled here. Maybe handling
486                it in the codec would be better */
487             if (i == 0)
488                 pkt.pts += 90 * sub->start_display_time;
489             else
490                 pkt.pts += 90 * sub->end_display_time;
491         }
492         write_frame(s, &pkt, ost);
493     }
494 }
495
496 static void do_video_out(AVFormatContext *s,
497                          OutputStream *ost,
498                          AVFrame *in_picture,
499                          int *frame_size, float quality)
500 {
501     int ret, format_video_sync;
502     AVPacket pkt;
503     AVCodecContext *enc = ost->st->codec;
504
505     *frame_size = 0;
506
507     format_video_sync = video_sync_method;
508     if (format_video_sync == VSYNC_AUTO)
509         format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
510                             (s->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
511     if (format_video_sync != VSYNC_PASSTHROUGH &&
512         ost->frame_number &&
513         in_picture->pts != AV_NOPTS_VALUE &&
514         in_picture->pts < ost->sync_opts) {
515         nb_frames_drop++;
516         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
517         return;
518     }
519
520     if (in_picture->pts == AV_NOPTS_VALUE)
521         in_picture->pts = ost->sync_opts;
522     ost->sync_opts = in_picture->pts;
523
524
525     if (!ost->frame_number)
526         ost->first_pts = in_picture->pts;
527
528     av_init_packet(&pkt);
529     pkt.data = NULL;
530     pkt.size = 0;
531
532     if (!check_recording_time(ost) ||
533         ost->frame_number >= ost->max_frames)
534         return;
535
536     if (s->oformat->flags & AVFMT_RAWPICTURE &&
537         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
538         /* raw pictures are written as AVPicture structure to
539            avoid any copies. We support temporarily the older
540            method. */
541         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
542         enc->coded_frame->top_field_first  = in_picture->top_field_first;
543         pkt.data   = (uint8_t *)in_picture;
544         pkt.size   =  sizeof(AVPicture);
545         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
546         pkt.flags |= AV_PKT_FLAG_KEY;
547
548         write_frame(s, &pkt, ost);
549     } else {
550         int got_packet;
551         AVFrame big_picture;
552
553         big_picture = *in_picture;
554         /* better than nothing: use input picture interlaced
555            settings */
556         big_picture.interlaced_frame = in_picture->interlaced_frame;
557         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
558             if (ost->top_field_first == -1)
559                 big_picture.top_field_first = in_picture->top_field_first;
560             else
561                 big_picture.top_field_first = !!ost->top_field_first;
562         }
563
564         /* handles same_quant here. This is not correct because it may
565            not be a global option */
566         big_picture.quality = quality;
567         if (!enc->me_threshold)
568             big_picture.pict_type = 0;
569         if (ost->forced_kf_index < ost->forced_kf_count &&
570             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
571             big_picture.pict_type = AV_PICTURE_TYPE_I;
572             ost->forced_kf_index++;
573         }
574         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
575         if (ret < 0) {
576             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
577             exit_program(1);
578         }
579
580         if (got_packet) {
581             if (pkt.pts != AV_NOPTS_VALUE)
582                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
583             if (pkt.dts != AV_NOPTS_VALUE)
584                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
585
586             write_frame(s, &pkt, ost);
587             *frame_size = pkt.size;
588             video_size += pkt.size;
589
590             /* if two pass, output log */
591             if (ost->logfile && enc->stats_out) {
592                 fprintf(ost->logfile, "%s", enc->stats_out);
593             }
594         }
595     }
596     ost->sync_opts++;
597     /*
598      * For video, number of frames in == number of packets out.
599      * But there may be reordering, so we can't throw away frames on encoder
600      * flush, we need to limit them here, before they go into encoder.
601      */
602     ost->frame_number++;
603 }
604
605 static double psnr(double d)
606 {
607     return -10.0 * log(d) / log(10.0);
608 }
609
610 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
611                            int frame_size)
612 {
613     AVCodecContext *enc;
614     int frame_number;
615     double ti1, bitrate, avg_bitrate;
616
617     /* this is executed just the first time do_video_stats is called */
618     if (!vstats_file) {
619         vstats_file = fopen(vstats_filename, "w");
620         if (!vstats_file) {
621             perror("fopen");
622             exit_program(1);
623         }
624     }
625
626     enc = ost->st->codec;
627     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
628         frame_number = ost->frame_number;
629         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
630         if (enc->flags&CODEC_FLAG_PSNR)
631             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
632
633         fprintf(vstats_file,"f_size= %6d ", frame_size);
634         /* compute pts value */
635         ti1 = ost->sync_opts * av_q2d(enc->time_base);
636         if (ti1 < 0.01)
637             ti1 = 0.01;
638
639         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
640         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
641         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
642                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
643         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
644     }
645 }
646
647 /**
648  * Read one frame for lavfi output for ost and encode it.
649  */
650 static int poll_filter(OutputStream *ost)
651 {
652     OutputFile    *of = output_files[ost->file_index];
653     AVFilterBufferRef *picref;
654     AVFrame *filtered_frame = NULL;
655     int frame_size, ret;
656
657     if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
658         return AVERROR(ENOMEM);
659     } else
660         avcodec_get_frame_defaults(ost->filtered_frame);
661     filtered_frame = ost->filtered_frame;
662
663     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
664         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
665         ret = av_buffersink_read_samples(ost->filter->filter, &picref,
666                                          ost->st->codec->frame_size);
667     else
668         ret = av_buffersink_read(ost->filter->filter, &picref);
669
670     if (ret < 0)
671         return ret;
672
673     avfilter_copy_buf_props(filtered_frame, picref);
674     if (picref->pts != AV_NOPTS_VALUE) {
675         filtered_frame->pts = av_rescale_q(picref->pts,
676                                            ost->filter->filter->inputs[0]->time_base,
677                                            ost->st->codec->time_base) -
678                               av_rescale_q(of->start_time,
679                                            AV_TIME_BASE_Q,
680                                            ost->st->codec->time_base);
681
682         if (of->start_time && filtered_frame->pts < 0) {
683             avfilter_unref_buffer(picref);
684             return 0;
685         }
686     }
687
688     switch (ost->filter->filter->inputs[0]->type) {
689     case AVMEDIA_TYPE_VIDEO:
690         if (!ost->frame_aspect_ratio)
691             ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
692
693         do_video_out(of->ctx, ost, filtered_frame, &frame_size,
694                      same_quant ? ost->last_quality :
695                                   ost->st->codec->global_quality);
696         if (vstats_filename && frame_size)
697             do_video_stats(of->ctx, ost, frame_size);
698         break;
699     case AVMEDIA_TYPE_AUDIO:
700         do_audio_out(of->ctx, ost, filtered_frame);
701         break;
702     default:
703         // TODO support subtitle filters
704         av_assert0(0);
705     }
706
707     avfilter_unref_buffer(picref);
708
709     return 0;
710 }
711
712 /**
713  * Read as many frames from possible from lavfi and encode them.
714  *
715  * Always read from the active stream with the lowest timestamp. If no frames
716  * are available for it then return EAGAIN and wait for more input. This way we
717  * can use lavfi sources that generate unlimited amount of frames without memory
718  * usage exploding.
719  */
720 static int poll_filters(void)
721 {
722     int i, j, ret = 0;
723
724     while (ret >= 0 && !received_sigterm) {
725         OutputStream *ost = NULL;
726         int64_t min_pts = INT64_MAX;
727
728         /* choose output stream with the lowest timestamp */
729         for (i = 0; i < nb_output_streams; i++) {
730             int64_t pts = output_streams[i]->sync_opts;
731
732             if (!output_streams[i]->filter || output_streams[i]->finished)
733                 continue;
734
735             pts = av_rescale_q(pts, output_streams[i]->st->codec->time_base,
736                                AV_TIME_BASE_Q);
737             if (pts < min_pts) {
738                 min_pts = pts;
739                 ost = output_streams[i];
740             }
741         }
742
743         if (!ost)
744             break;
745
746         ret = poll_filter(ost);
747
748         if (ret == AVERROR_EOF) {
749             OutputFile *of = output_files[ost->file_index];
750
751             ost->finished = 1;
752
753             if (of->shortest) {
754                 for (j = 0; j < of->ctx->nb_streams; j++)
755                     output_streams[of->ost_index + j]->finished = 1;
756             }
757
758             ret = 0;
759         } else if (ret == AVERROR(EAGAIN))
760             return 0;
761     }
762
763     return ret;
764 }
765
766 static void print_report(int is_last_report, int64_t timer_start)
767 {
768     char buf[1024];
769     OutputStream *ost;
770     AVFormatContext *oc;
771     int64_t total_size;
772     AVCodecContext *enc;
773     int frame_number, vid, i;
774     double bitrate, ti1, pts;
775     static int64_t last_time = -1;
776     static int qp_histogram[52];
777
778     if (!print_stats && !is_last_report)
779         return;
780
781     if (!is_last_report) {
782         int64_t cur_time;
783         /* display the report every 0.5 seconds */
784         cur_time = av_gettime();
785         if (last_time == -1) {
786             last_time = cur_time;
787             return;
788         }
789         if ((cur_time - last_time) < 500000)
790             return;
791         last_time = cur_time;
792     }
793
794
795     oc = output_files[0]->ctx;
796
797     total_size = avio_size(oc->pb);
798     if (total_size < 0) // FIXME improve avio_size() so it works with non seekable output too
799         total_size = avio_tell(oc->pb);
800
801     buf[0] = '\0';
802     ti1 = 1e10;
803     vid = 0;
804     for (i = 0; i < nb_output_streams; i++) {
805         float q = -1;
806         ost = output_streams[i];
807         enc = ost->st->codec;
808         if (!ost->stream_copy && enc->coded_frame)
809             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
810         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
811             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
812         }
813         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
814             float t = (av_gettime() - timer_start) / 1000000.0;
815
816             frame_number = ost->frame_number;
817             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
818                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
819             if (is_last_report)
820                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
821             if (qp_hist) {
822                 int j;
823                 int qp = lrintf(q);
824                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
825                     qp_histogram[qp]++;
826                 for (j = 0; j < 32; j++)
827                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
828             }
829             if (enc->flags&CODEC_FLAG_PSNR) {
830                 int j;
831                 double error, error_sum = 0;
832                 double scale, scale_sum = 0;
833                 char type[3] = { 'Y','U','V' };
834                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
835                 for (j = 0; j < 3; j++) {
836                     if (is_last_report) {
837                         error = enc->error[j];
838                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
839                     } else {
840                         error = enc->coded_frame->error[j];
841                         scale = enc->width * enc->height * 255.0 * 255.0;
842                     }
843                     if (j)
844                         scale /= 4;
845                     error_sum += error;
846                     scale_sum += scale;
847                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
848                 }
849                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
850             }
851             vid = 1;
852         }
853         /* compute min output value */
854         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
855         if ((pts < ti1) && (pts > 0))
856             ti1 = pts;
857     }
858     if (ti1 < 0.01)
859         ti1 = 0.01;
860
861     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
862
863     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
864             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
865             (double)total_size / 1024, ti1, bitrate);
866
867     if (nb_frames_dup || nb_frames_drop)
868         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
869                 nb_frames_dup, nb_frames_drop);
870
871     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
872
873     fflush(stderr);
874
875     if (is_last_report) {
876         int64_t raw= audio_size + video_size + extra_size;
877         av_log(NULL, AV_LOG_INFO, "\n");
878         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
879                video_size / 1024.0,
880                audio_size / 1024.0,
881                extra_size / 1024.0,
882                100.0 * (total_size - raw) / raw
883         );
884     }
885 }
886
887 static void flush_encoders(void)
888 {
889     int i, ret;
890
891     for (i = 0; i < nb_output_streams; i++) {
892         OutputStream   *ost = output_streams[i];
893         AVCodecContext *enc = ost->st->codec;
894         AVFormatContext *os = output_files[ost->file_index]->ctx;
895         int stop_encoding = 0;
896
897         if (!ost->encoding_needed)
898             continue;
899
900         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
901             continue;
902         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
903             continue;
904
905         for (;;) {
906             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
907             const char *desc;
908             int64_t *size;
909
910             switch (ost->st->codec->codec_type) {
911             case AVMEDIA_TYPE_AUDIO:
912                 encode = avcodec_encode_audio2;
913                 desc   = "Audio";
914                 size   = &audio_size;
915                 break;
916             case AVMEDIA_TYPE_VIDEO:
917                 encode = avcodec_encode_video2;
918                 desc   = "Video";
919                 size   = &video_size;
920                 break;
921             default:
922                 stop_encoding = 1;
923             }
924
925             if (encode) {
926                 AVPacket pkt;
927                 int got_packet;
928                 av_init_packet(&pkt);
929                 pkt.data = NULL;
930                 pkt.size = 0;
931
932                 ret = encode(enc, &pkt, NULL, &got_packet);
933                 if (ret < 0) {
934                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
935                     exit_program(1);
936                 }
937                 *size += ret;
938                 if (ost->logfile && enc->stats_out) {
939                     fprintf(ost->logfile, "%s", enc->stats_out);
940                 }
941                 if (!got_packet) {
942                     stop_encoding = 1;
943                     break;
944                 }
945                 if (pkt.pts != AV_NOPTS_VALUE)
946                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
947                 if (pkt.dts != AV_NOPTS_VALUE)
948                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
949                 write_frame(os, &pkt, ost);
950             }
951
952             if (stop_encoding)
953                 break;
954         }
955     }
956 }
957
958 /*
959  * Check whether a packet from ist should be written into ost at this time
960  */
961 static int check_output_constraints(InputStream *ist, OutputStream *ost)
962 {
963     OutputFile *of = output_files[ost->file_index];
964     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
965
966     if (ost->source_index != ist_index)
967         return 0;
968
969     if (of->start_time && ist->last_dts < of->start_time)
970         return 0;
971
972     return 1;
973 }
974
975 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
976 {
977     OutputFile *of = output_files[ost->file_index];
978     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
979     AVPacket opkt;
980
981     av_init_packet(&opkt);
982
983     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
984         !ost->copy_initial_nonkeyframes)
985         return;
986
987     if (of->recording_time != INT64_MAX &&
988         ist->last_dts >= of->recording_time + of->start_time) {
989         ost->finished = 1;
990         return;
991     }
992
993     /* force the input stream PTS */
994     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
995         audio_size += pkt->size;
996     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
997         video_size += pkt->size;
998         ost->sync_opts++;
999     }
1000
1001     if (pkt->pts != AV_NOPTS_VALUE)
1002         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1003     else
1004         opkt.pts = AV_NOPTS_VALUE;
1005
1006     if (pkt->dts == AV_NOPTS_VALUE)
1007         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
1008     else
1009         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1010     opkt.dts -= ost_tb_start_time;
1011
1012     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1013     opkt.flags    = pkt->flags;
1014
1015     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1016     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1017        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1018        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1019        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1020        ) {
1021         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1022             opkt.destruct = av_destruct_packet;
1023     } else {
1024         opkt.data = pkt->data;
1025         opkt.size = pkt->size;
1026     }
1027
1028     write_frame(of->ctx, &opkt, ost);
1029     ost->st->codec->frame_number++;
1030     av_free_packet(&opkt);
1031 }
1032
1033 static void rate_emu_sleep(InputStream *ist)
1034 {
1035     if (input_files[ist->file_index]->rate_emu) {
1036         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
1037         int64_t now = av_gettime() - ist->start;
1038         if (pts > now)
1039             av_usleep(pts - now);
1040     }
1041 }
1042
1043 int guess_input_channel_layout(InputStream *ist)
1044 {
1045     AVCodecContext *dec = ist->st->codec;
1046
1047     if (!dec->channel_layout) {
1048         char layout_name[256];
1049
1050         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1051         if (!dec->channel_layout)
1052             return 0;
1053         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1054                                      dec->channels, dec->channel_layout);
1055         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1056                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1057     }
1058     return 1;
1059 }
1060
1061 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1062 {
1063     AVFrame *decoded_frame;
1064     AVCodecContext *avctx = ist->st->codec;
1065     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
1066     int i, ret, resample_changed;
1067
1068     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1069         return AVERROR(ENOMEM);
1070     else
1071         avcodec_get_frame_defaults(ist->decoded_frame);
1072     decoded_frame = ist->decoded_frame;
1073
1074     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1075     if (!*got_output || ret < 0) {
1076         if (!pkt->size) {
1077             for (i = 0; i < ist->nb_filters; i++)
1078                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1079         }
1080         return ret;
1081     }
1082
1083     /* if the decoder provides a pts, use it instead of the last packet pts.
1084        the decoder could be delaying output by a packet or more. */
1085     if (decoded_frame->pts != AV_NOPTS_VALUE)
1086         ist->next_dts = decoded_frame->pts;
1087     else if (pkt->pts != AV_NOPTS_VALUE) {
1088         decoded_frame->pts = pkt->pts;
1089         pkt->pts           = AV_NOPTS_VALUE;
1090     }
1091
1092     // preprocess audio (volume)
1093     if (audio_volume != 256) {
1094         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
1095         void *samples = decoded_frame->data[0];
1096         switch (avctx->sample_fmt) {
1097         case AV_SAMPLE_FMT_U8:
1098         {
1099             uint8_t *volp = samples;
1100             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1101                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
1102                 *volp++ = av_clip_uint8(v);
1103             }
1104             break;
1105         }
1106         case AV_SAMPLE_FMT_S16:
1107         {
1108             int16_t *volp = samples;
1109             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1110                 int v = ((*volp) * audio_volume + 128) >> 8;
1111                 *volp++ = av_clip_int16(v);
1112             }
1113             break;
1114         }
1115         case AV_SAMPLE_FMT_S32:
1116         {
1117             int32_t *volp = samples;
1118             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1119                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
1120                 *volp++ = av_clipl_int32(v);
1121             }
1122             break;
1123         }
1124         case AV_SAMPLE_FMT_FLT:
1125         {
1126             float *volp = samples;
1127             float scale = audio_volume / 256.f;
1128             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1129                 *volp++ *= scale;
1130             }
1131             break;
1132         }
1133         case AV_SAMPLE_FMT_DBL:
1134         {
1135             double *volp = samples;
1136             double scale = audio_volume / 256.;
1137             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1138                 *volp++ *= scale;
1139             }
1140             break;
1141         }
1142         default:
1143             av_log(NULL, AV_LOG_FATAL,
1144                    "Audio volume adjustment on sample format %s is not supported.\n",
1145                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
1146             exit_program(1);
1147         }
1148     }
1149
1150     rate_emu_sleep(ist);
1151
1152     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1153                        ist->resample_channels       != avctx->channels               ||
1154                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1155                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1156     if (resample_changed) {
1157         char layout1[64], layout2[64];
1158
1159         if (!guess_input_channel_layout(ist)) {
1160             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1161                    "layout for Input Stream #%d.%d\n", ist->file_index,
1162                    ist->st->index);
1163             exit_program(1);
1164         }
1165         decoded_frame->channel_layout = avctx->channel_layout;
1166
1167         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1168                                      ist->resample_channel_layout);
1169         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1170                                      decoded_frame->channel_layout);
1171
1172         av_log(NULL, AV_LOG_INFO,
1173                "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",
1174                ist->file_index, ist->st->index,
1175                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1176                ist->resample_channels, layout1,
1177                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1178                avctx->channels, layout2);
1179
1180         ist->resample_sample_fmt     = decoded_frame->format;
1181         ist->resample_sample_rate    = decoded_frame->sample_rate;
1182         ist->resample_channel_layout = decoded_frame->channel_layout;
1183         ist->resample_channels       = avctx->channels;
1184
1185         for (i = 0; i < nb_filtergraphs; i++)
1186             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1187                 configure_filtergraph(filtergraphs[i]) < 0) {
1188                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1189                 exit_program(1);
1190             }
1191     }
1192
1193     if (decoded_frame->pts != AV_NOPTS_VALUE)
1194         decoded_frame->pts = av_rescale_q(decoded_frame->pts,
1195                                           ist->st->time_base,
1196                                           (AVRational){1, ist->st->codec->sample_rate});
1197     for (i = 0; i < ist->nb_filters; i++)
1198         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1199
1200     return ret;
1201 }
1202
1203 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1204 {
1205     AVFrame *decoded_frame;
1206     void *buffer_to_free = NULL;
1207     int i, ret = 0, resample_changed;
1208     float quality;
1209
1210     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1211         return AVERROR(ENOMEM);
1212     else
1213         avcodec_get_frame_defaults(ist->decoded_frame);
1214     decoded_frame = ist->decoded_frame;
1215
1216     ret = avcodec_decode_video2(ist->st->codec,
1217                                 decoded_frame, got_output, pkt);
1218     if (!*got_output || ret < 0) {
1219         if (!pkt->size) {
1220             for (i = 0; i < ist->nb_filters; i++)
1221                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1222         }
1223         return ret;
1224     }
1225
1226     quality = same_quant ? decoded_frame->quality : 0;
1227     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
1228                                            decoded_frame->pkt_dts);
1229     pkt->size = 0;
1230     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
1231
1232     rate_emu_sleep(ist);
1233
1234     if (ist->st->sample_aspect_ratio.num)
1235         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1236
1237     resample_changed = ist->resample_width   != decoded_frame->width  ||
1238                        ist->resample_height  != decoded_frame->height ||
1239                        ist->resample_pix_fmt != decoded_frame->format;
1240     if (resample_changed) {
1241         av_log(NULL, AV_LOG_INFO,
1242                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1243                ist->file_index, ist->st->index,
1244                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1245                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1246
1247         ist->resample_width   = decoded_frame->width;
1248         ist->resample_height  = decoded_frame->height;
1249         ist->resample_pix_fmt = decoded_frame->format;
1250
1251         for (i = 0; i < nb_filtergraphs; i++)
1252             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1253                 configure_filtergraph(filtergraphs[i]) < 0) {
1254                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1255                 exit_program(1);
1256             }
1257     }
1258
1259     for (i = 0; i < ist->nb_filters; i++) {
1260         // XXX what an ugly hack
1261         if (ist->filters[i]->graph->nb_outputs == 1)
1262             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
1263
1264         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
1265             FrameBuffer      *buf = decoded_frame->opaque;
1266             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
1267                                         decoded_frame->data, decoded_frame->linesize,
1268                                         AV_PERM_READ | AV_PERM_PRESERVE,
1269                                         ist->st->codec->width, ist->st->codec->height,
1270                                         ist->st->codec->pix_fmt);
1271
1272             avfilter_copy_frame_props(fb, decoded_frame);
1273             fb->buf->priv           = buf;
1274             fb->buf->free           = filter_release_buffer;
1275
1276             buf->refcount++;
1277             av_buffersrc_buffer(ist->filters[i]->filter, fb);
1278         } else
1279             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1280     }
1281
1282     av_free(buffer_to_free);
1283     return ret;
1284 }
1285
1286 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1287 {
1288     AVSubtitle subtitle;
1289     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1290                                           &subtitle, got_output, pkt);
1291     if (ret < 0)
1292         return ret;
1293     if (!*got_output)
1294         return ret;
1295
1296     rate_emu_sleep(ist);
1297
1298     for (i = 0; i < nb_output_streams; i++) {
1299         OutputStream *ost = output_streams[i];
1300
1301         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1302             continue;
1303
1304         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
1305     }
1306
1307     avsubtitle_free(&subtitle);
1308     return ret;
1309 }
1310
1311 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1312 static int output_packet(InputStream *ist, const AVPacket *pkt)
1313 {
1314     int i;
1315     int got_output;
1316     AVPacket avpkt;
1317
1318     if (ist->next_dts == AV_NOPTS_VALUE)
1319         ist->next_dts = ist->last_dts;
1320
1321     if (pkt == NULL) {
1322         /* EOF handling */
1323         av_init_packet(&avpkt);
1324         avpkt.data = NULL;
1325         avpkt.size = 0;
1326         goto handle_eof;
1327     } else {
1328         avpkt = *pkt;
1329     }
1330
1331     if (pkt->dts != AV_NOPTS_VALUE)
1332         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1333
1334     // while we have more to decode or while the decoder did output something on EOF
1335     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1336         int ret = 0;
1337     handle_eof:
1338
1339         ist->last_dts = ist->next_dts;
1340
1341         if (avpkt.size && avpkt.size != pkt->size) {
1342             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1343                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1344             ist->showed_multi_packet_warning = 1;
1345         }
1346
1347         switch (ist->st->codec->codec_type) {
1348         case AVMEDIA_TYPE_AUDIO:
1349             ret = decode_audio    (ist, &avpkt, &got_output);
1350             break;
1351         case AVMEDIA_TYPE_VIDEO:
1352             ret = decode_video    (ist, &avpkt, &got_output);
1353             if (avpkt.duration)
1354                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1355             else if (ist->st->avg_frame_rate.num)
1356                 ist->next_dts += av_rescale_q(1, av_inv_q(ist->st->avg_frame_rate),
1357                                               AV_TIME_BASE_Q);
1358             else if (ist->st->codec->time_base.num != 0) {
1359                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
1360                                                    ist->st->codec->ticks_per_frame;
1361                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
1362             }
1363             break;
1364         case AVMEDIA_TYPE_SUBTITLE:
1365             ret = transcode_subtitles(ist, &avpkt, &got_output);
1366             break;
1367         default:
1368             return -1;
1369         }
1370
1371         if (ret < 0)
1372             return ret;
1373         // touch data and size only if not EOF
1374         if (pkt) {
1375             avpkt.data += ret;
1376             avpkt.size -= ret;
1377         }
1378         if (!got_output) {
1379             continue;
1380         }
1381     }
1382
1383     /* handle stream copy */
1384     if (!ist->decoding_needed) {
1385         rate_emu_sleep(ist);
1386         ist->last_dts = ist->next_dts;
1387         switch (ist->st->codec->codec_type) {
1388         case AVMEDIA_TYPE_AUDIO:
1389             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1390                              ist->st->codec->sample_rate;
1391             break;
1392         case AVMEDIA_TYPE_VIDEO:
1393             if (ist->st->codec->time_base.num != 0) {
1394                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
1395                 ist->next_dts += ((int64_t)AV_TIME_BASE *
1396                                   ist->st->codec->time_base.num * ticks) /
1397                                   ist->st->codec->time_base.den;
1398             }
1399             break;
1400         }
1401     }
1402     for (i = 0; pkt && i < nb_output_streams; i++) {
1403         OutputStream *ost = output_streams[i];
1404
1405         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1406             continue;
1407
1408         do_streamcopy(ist, ost, pkt);
1409     }
1410
1411     return 0;
1412 }
1413
1414 static void print_sdp(void)
1415 {
1416     char sdp[2048];
1417     int i;
1418     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
1419
1420     if (!avc)
1421         exit_program(1);
1422     for (i = 0; i < nb_output_files; i++)
1423         avc[i] = output_files[i]->ctx;
1424
1425     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
1426     printf("SDP:\n%s\n", sdp);
1427     fflush(stdout);
1428     av_freep(&avc);
1429 }
1430
1431 static int init_input_stream(int ist_index, char *error, int error_len)
1432 {
1433     int i;
1434     InputStream *ist = input_streams[ist_index];
1435     if (ist->decoding_needed) {
1436         AVCodec *codec = ist->dec;
1437         if (!codec) {
1438             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
1439                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
1440             return AVERROR(EINVAL);
1441         }
1442
1443         /* update requested sample format for the decoder based on the
1444            corresponding encoder sample format */
1445         for (i = 0; i < nb_output_streams; i++) {
1446             OutputStream *ost = output_streams[i];
1447             if (ost->source_index == ist_index) {
1448                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
1449                 break;
1450             }
1451         }
1452
1453         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
1454             ist->st->codec->get_buffer     = codec_get_buffer;
1455             ist->st->codec->release_buffer = codec_release_buffer;
1456             ist->st->codec->opaque         = &ist->buffer_pool;
1457         }
1458
1459         if (!av_dict_get(ist->opts, "threads", NULL, 0))
1460             av_dict_set(&ist->opts, "threads", "auto", 0);
1461         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
1462             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
1463                     ist->file_index, ist->st->index);
1464             return AVERROR(EINVAL);
1465         }
1466         assert_codec_experimental(ist->st->codec, 0);
1467         assert_avoptions(ist->opts);
1468     }
1469
1470     ist->last_dts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
1471     ist->next_dts = AV_NOPTS_VALUE;
1472     init_pts_correction(&ist->pts_ctx);
1473     ist->is_start = 1;
1474
1475     return 0;
1476 }
1477
1478 static InputStream *get_input_stream(OutputStream *ost)
1479 {
1480     if (ost->source_index >= 0)
1481         return input_streams[ost->source_index];
1482
1483     if (ost->filter) {
1484         FilterGraph *fg = ost->filter->graph;
1485         int i;
1486
1487         for (i = 0; i < fg->nb_inputs; i++)
1488             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
1489                 return fg->inputs[i]->ist;
1490     }
1491
1492     return NULL;
1493 }
1494
1495 static void parse_forced_key_frames(char *kf, OutputStream *ost,
1496                                     AVCodecContext *avctx)
1497 {
1498     char *p;
1499     int n = 1, i;
1500     int64_t t;
1501
1502     for (p = kf; *p; p++)
1503         if (*p == ',')
1504             n++;
1505     ost->forced_kf_count = n;
1506     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
1507     if (!ost->forced_kf_pts) {
1508         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
1509         exit_program(1);
1510     }
1511
1512     p = kf;
1513     for (i = 0; i < n; i++) {
1514         char *next = strchr(p, ',');
1515
1516         if (next)
1517             *next++ = 0;
1518
1519         t = parse_time_or_die("force_key_frames", p, 1);
1520         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
1521
1522         p = next;
1523     }
1524 }
1525
1526 static int transcode_init(void)
1527 {
1528     int ret = 0, i, j, k;
1529     AVFormatContext *oc;
1530     AVCodecContext *codec;
1531     OutputStream *ost;
1532     InputStream *ist;
1533     char error[1024];
1534     int want_sdp = 1;
1535
1536     /* init framerate emulation */
1537     for (i = 0; i < nb_input_files; i++) {
1538         InputFile *ifile = input_files[i];
1539         if (ifile->rate_emu)
1540             for (j = 0; j < ifile->nb_streams; j++)
1541                 input_streams[j + ifile->ist_index]->start = av_gettime();
1542     }
1543
1544     /* output stream init */
1545     for (i = 0; i < nb_output_files; i++) {
1546         oc = output_files[i]->ctx;
1547         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
1548             av_dump_format(oc, i, oc->filename, 1);
1549             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
1550             return AVERROR(EINVAL);
1551         }
1552     }
1553
1554     /* init complex filtergraphs */
1555     for (i = 0; i < nb_filtergraphs; i++)
1556         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
1557             return ret;
1558
1559     /* for each output stream, we compute the right encoding parameters */
1560     for (i = 0; i < nb_output_streams; i++) {
1561         AVCodecContext *icodec = NULL;
1562         ost = output_streams[i];
1563         oc  = output_files[ost->file_index]->ctx;
1564         ist = get_input_stream(ost);
1565
1566         if (ost->attachment_filename)
1567             continue;
1568
1569         codec  = ost->st->codec;
1570
1571         if (ist) {
1572             icodec = ist->st->codec;
1573
1574             ost->st->disposition          = ist->st->disposition;
1575             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
1576             codec->chroma_sample_location = icodec->chroma_sample_location;
1577         }
1578
1579         if (ost->stream_copy) {
1580             uint64_t extra_size;
1581
1582             av_assert0(ist && !ost->filter);
1583
1584             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
1585
1586             if (extra_size > INT_MAX) {
1587                 return AVERROR(EINVAL);
1588             }
1589
1590             /* if stream_copy is selected, no need to decode or encode */
1591             codec->codec_id   = icodec->codec_id;
1592             codec->codec_type = icodec->codec_type;
1593
1594             if (!codec->codec_tag) {
1595                 if (!oc->oformat->codec_tag ||
1596                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
1597                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
1598                     codec->codec_tag = icodec->codec_tag;
1599             }
1600
1601             codec->bit_rate       = icodec->bit_rate;
1602             codec->rc_max_rate    = icodec->rc_max_rate;
1603             codec->rc_buffer_size = icodec->rc_buffer_size;
1604             codec->field_order    = icodec->field_order;
1605             codec->extradata      = av_mallocz(extra_size);
1606             if (!codec->extradata) {
1607                 return AVERROR(ENOMEM);
1608             }
1609             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
1610             codec->extradata_size = icodec->extradata_size;
1611             if (!copy_tb) {
1612                 codec->time_base      = icodec->time_base;
1613                 codec->time_base.num *= icodec->ticks_per_frame;
1614                 av_reduce(&codec->time_base.num, &codec->time_base.den,
1615                           codec->time_base.num, codec->time_base.den, INT_MAX);
1616             } else
1617                 codec->time_base = ist->st->time_base;
1618
1619             switch (codec->codec_type) {
1620             case AVMEDIA_TYPE_AUDIO:
1621                 if (audio_volume != 256) {
1622                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
1623                     exit_program(1);
1624                 }
1625                 codec->channel_layout     = icodec->channel_layout;
1626                 codec->sample_rate        = icodec->sample_rate;
1627                 codec->channels           = icodec->channels;
1628                 codec->frame_size         = icodec->frame_size;
1629                 codec->audio_service_type = icodec->audio_service_type;
1630                 codec->block_align        = icodec->block_align;
1631                 break;
1632             case AVMEDIA_TYPE_VIDEO:
1633                 codec->pix_fmt            = icodec->pix_fmt;
1634                 codec->width              = icodec->width;
1635                 codec->height             = icodec->height;
1636                 codec->has_b_frames       = icodec->has_b_frames;
1637                 if (!codec->sample_aspect_ratio.num) {
1638                     codec->sample_aspect_ratio   =
1639                     ost->st->sample_aspect_ratio =
1640                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
1641                         ist->st->codec->sample_aspect_ratio.num ?
1642                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
1643                 }
1644                 break;
1645             case AVMEDIA_TYPE_SUBTITLE:
1646                 codec->width  = icodec->width;
1647                 codec->height = icodec->height;
1648                 break;
1649             case AVMEDIA_TYPE_DATA:
1650             case AVMEDIA_TYPE_ATTACHMENT:
1651                 break;
1652             default:
1653                 abort();
1654             }
1655         } else {
1656             if (!ost->enc) {
1657                 /* should only happen when a default codec is not present. */
1658                 snprintf(error, sizeof(error), "Automatic encoder selection "
1659                          "failed for output stream #%d:%d. Default encoder for "
1660                          "format %s is probably disabled. Please choose an "
1661                          "encoder manually.\n", ost->file_index, ost->index,
1662                          oc->oformat->name);
1663                 ret = AVERROR(EINVAL);
1664                 goto dump_format;
1665             }
1666
1667             if (ist)
1668                 ist->decoding_needed = 1;
1669             ost->encoding_needed = 1;
1670
1671             /*
1672              * We want CFR output if and only if one of those is true:
1673              * 1) user specified output framerate with -r
1674              * 2) user specified -vsync cfr
1675              * 3) output format is CFR and the user didn't force vsync to
1676              *    something else than CFR
1677              *
1678              * in such a case, set ost->frame_rate
1679              */
1680             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1681                 !ost->frame_rate.num && ist &&
1682                 (video_sync_method ==  VSYNC_CFR ||
1683                  (video_sync_method ==  VSYNC_AUTO &&
1684                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
1685                 ost->frame_rate = ist->framerate.num ? ist->framerate :
1686                                   ist->st->avg_frame_rate.num ?
1687                                   ist->st->avg_frame_rate :
1688                                   (AVRational){25, 1};
1689
1690                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
1691                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
1692                     ost->frame_rate = ost->enc->supported_framerates[idx];
1693                 }
1694             }
1695
1696             if (!ost->filter &&
1697                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
1698                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
1699                     FilterGraph *fg;
1700                     fg = init_simple_filtergraph(ist, ost);
1701                     if (configure_filtergraph(fg)) {
1702                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
1703                         exit(1);
1704                     }
1705             }
1706
1707             switch (codec->codec_type) {
1708             case AVMEDIA_TYPE_AUDIO:
1709                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
1710                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
1711                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
1712                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
1713                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
1714                 break;
1715             case AVMEDIA_TYPE_VIDEO:
1716                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
1717
1718                 codec->width  = ost->filter->filter->inputs[0]->w;
1719                 codec->height = ost->filter->filter->inputs[0]->h;
1720                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
1721                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
1722                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
1723                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
1724                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
1725
1726                 if (icodec &&
1727                     (codec->width   != icodec->width  ||
1728                      codec->height  != icodec->height ||
1729                      codec->pix_fmt != icodec->pix_fmt)) {
1730                     codec->bits_per_raw_sample = 0;
1731                 }
1732
1733                 if (ost->forced_keyframes)
1734                     parse_forced_key_frames(ost->forced_keyframes, ost,
1735                                             ost->st->codec);
1736                 break;
1737             case AVMEDIA_TYPE_SUBTITLE:
1738                 codec->time_base = (AVRational){1, 1000};
1739                 break;
1740             default:
1741                 abort();
1742                 break;
1743             }
1744             /* two pass mode */
1745             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
1746                 char logfilename[1024];
1747                 FILE *f;
1748
1749                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
1750                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
1751                          i);
1752                 if (!strcmp(ost->enc->name, "libx264")) {
1753                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
1754                 } else {
1755                     if (codec->flags & CODEC_FLAG_PASS1) {
1756                         f = fopen(logfilename, "wb");
1757                         if (!f) {
1758                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
1759                                    logfilename, strerror(errno));
1760                             exit_program(1);
1761                         }
1762                         ost->logfile = f;
1763                     } else {
1764                         char  *logbuffer;
1765                         size_t logbuffer_size;
1766                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
1767                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
1768                                    logfilename);
1769                             exit_program(1);
1770                         }
1771                         codec->stats_in = logbuffer;
1772                     }
1773                 }
1774             }
1775         }
1776     }
1777
1778     /* open each encoder */
1779     for (i = 0; i < nb_output_streams; i++) {
1780         ost = output_streams[i];
1781         if (ost->encoding_needed) {
1782             AVCodec      *codec = ost->enc;
1783             AVCodecContext *dec = NULL;
1784
1785             if ((ist = get_input_stream(ost)))
1786                 dec = ist->st->codec;
1787             if (dec && dec->subtitle_header) {
1788                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
1789                 if (!ost->st->codec->subtitle_header) {
1790                     ret = AVERROR(ENOMEM);
1791                     goto dump_format;
1792                 }
1793                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
1794                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
1795             }
1796             if (!av_dict_get(ost->opts, "threads", NULL, 0))
1797                 av_dict_set(&ost->opts, "threads", "auto", 0);
1798             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
1799                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
1800                         ost->file_index, ost->index);
1801                 ret = AVERROR(EINVAL);
1802                 goto dump_format;
1803             }
1804             assert_codec_experimental(ost->st->codec, 1);
1805             assert_avoptions(ost->opts);
1806             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
1807                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
1808                                              "It takes bits/s as argument, not kbits/s\n");
1809             extra_size += ost->st->codec->extradata_size;
1810
1811             if (ost->st->codec->me_threshold)
1812                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
1813         }
1814     }
1815
1816     /* init input streams */
1817     for (i = 0; i < nb_input_streams; i++)
1818         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
1819             goto dump_format;
1820
1821     /* discard unused programs */
1822     for (i = 0; i < nb_input_files; i++) {
1823         InputFile *ifile = input_files[i];
1824         for (j = 0; j < ifile->ctx->nb_programs; j++) {
1825             AVProgram *p = ifile->ctx->programs[j];
1826             int discard  = AVDISCARD_ALL;
1827
1828             for (k = 0; k < p->nb_stream_indexes; k++)
1829                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
1830                     discard = AVDISCARD_DEFAULT;
1831                     break;
1832                 }
1833             p->discard = discard;
1834         }
1835     }
1836
1837     /* open files and write file headers */
1838     for (i = 0; i < nb_output_files; i++) {
1839         oc = output_files[i]->ctx;
1840         oc->interrupt_callback = int_cb;
1841         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
1842             char errbuf[128];
1843             const char *errbuf_ptr = errbuf;
1844             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
1845                 errbuf_ptr = strerror(AVUNERROR(ret));
1846             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
1847             ret = AVERROR(EINVAL);
1848             goto dump_format;
1849         }
1850         assert_avoptions(output_files[i]->opts);
1851         if (strcmp(oc->oformat->name, "rtp")) {
1852             want_sdp = 0;
1853         }
1854     }
1855
1856  dump_format:
1857     /* dump the file output parameters - cannot be done before in case
1858        of stream copy */
1859     for (i = 0; i < nb_output_files; i++) {
1860         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
1861     }
1862
1863     /* dump the stream mapping */
1864     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
1865     for (i = 0; i < nb_input_streams; i++) {
1866         ist = input_streams[i];
1867
1868         for (j = 0; j < ist->nb_filters; j++) {
1869             if (ist->filters[j]->graph->graph_desc) {
1870                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
1871                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
1872                        ist->filters[j]->name);
1873                 if (nb_filtergraphs > 1)
1874                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
1875                 av_log(NULL, AV_LOG_INFO, "\n");
1876             }
1877         }
1878     }
1879
1880     for (i = 0; i < nb_output_streams; i++) {
1881         ost = output_streams[i];
1882
1883         if (ost->attachment_filename) {
1884             /* an attached file */
1885             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
1886                    ost->attachment_filename, ost->file_index, ost->index);
1887             continue;
1888         }
1889
1890         if (ost->filter && ost->filter->graph->graph_desc) {
1891             /* output from a complex graph */
1892             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
1893             if (nb_filtergraphs > 1)
1894                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
1895
1896             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
1897                    ost->index, ost->enc ? ost->enc->name : "?");
1898             continue;
1899         }
1900
1901         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
1902                input_streams[ost->source_index]->file_index,
1903                input_streams[ost->source_index]->st->index,
1904                ost->file_index,
1905                ost->index);
1906         if (ost->sync_ist != input_streams[ost->source_index])
1907             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
1908                    ost->sync_ist->file_index,
1909                    ost->sync_ist->st->index);
1910         if (ost->stream_copy)
1911             av_log(NULL, AV_LOG_INFO, " (copy)");
1912         else
1913             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
1914                    input_streams[ost->source_index]->dec->name : "?",
1915                    ost->enc ? ost->enc->name : "?");
1916         av_log(NULL, AV_LOG_INFO, "\n");
1917     }
1918
1919     if (ret) {
1920         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
1921         return ret;
1922     }
1923
1924     if (want_sdp) {
1925         print_sdp();
1926     }
1927
1928     return 0;
1929 }
1930
1931 /**
1932  * @return 1 if there are still streams where more output is wanted,
1933  *         0 otherwise
1934  */
1935 static int need_output(void)
1936 {
1937     int i;
1938
1939     for (i = 0; i < nb_output_streams; i++) {
1940         OutputStream *ost    = output_streams[i];
1941         OutputFile *of       = output_files[ost->file_index];
1942         AVFormatContext *os  = output_files[ost->file_index]->ctx;
1943
1944         if (ost->finished ||
1945             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
1946             continue;
1947         if (ost->frame_number >= ost->max_frames) {
1948             int j;
1949             for (j = 0; j < of->ctx->nb_streams; j++)
1950                 output_streams[of->ost_index + j]->finished = 1;
1951             continue;
1952         }
1953
1954         return 1;
1955     }
1956
1957     return 0;
1958 }
1959
1960 static InputFile *select_input_file(void)
1961 {
1962     InputFile *ifile = NULL;
1963     int64_t ipts_min = INT64_MAX;
1964     int i;
1965
1966     for (i = 0; i < nb_input_streams; i++) {
1967         InputStream *ist = input_streams[i];
1968         int64_t ipts     = ist->last_dts;
1969
1970         if (ist->discard || input_files[ist->file_index]->eagain)
1971             continue;
1972         if (!input_files[ist->file_index]->eof_reached) {
1973             if (ipts < ipts_min) {
1974                 ipts_min = ipts;
1975                 ifile    = input_files[ist->file_index];
1976             }
1977         }
1978     }
1979
1980     return ifile;
1981 }
1982
1983 #if HAVE_PTHREADS
1984 static void *input_thread(void *arg)
1985 {
1986     InputFile *f = arg;
1987     int ret = 0;
1988
1989     while (!transcoding_finished && ret >= 0) {
1990         AVPacket pkt;
1991         ret = av_read_frame(f->ctx, &pkt);
1992
1993         if (ret == AVERROR(EAGAIN)) {
1994             av_usleep(10000);
1995             ret = 0;
1996             continue;
1997         } else if (ret < 0)
1998             break;
1999
2000         pthread_mutex_lock(&f->fifo_lock);
2001         while (!av_fifo_space(f->fifo))
2002             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2003
2004         av_dup_packet(&pkt);
2005         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2006
2007         pthread_mutex_unlock(&f->fifo_lock);
2008     }
2009
2010     f->finished = 1;
2011     return NULL;
2012 }
2013
2014 static void free_input_threads(void)
2015 {
2016     int i;
2017
2018     if (nb_input_files == 1)
2019         return;
2020
2021     transcoding_finished = 1;
2022
2023     for (i = 0; i < nb_input_files; i++) {
2024         InputFile *f = input_files[i];
2025         AVPacket pkt;
2026
2027         if (!f->fifo || f->joined)
2028             continue;
2029
2030         pthread_mutex_lock(&f->fifo_lock);
2031         while (av_fifo_size(f->fifo)) {
2032             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2033             av_free_packet(&pkt);
2034         }
2035         pthread_cond_signal(&f->fifo_cond);
2036         pthread_mutex_unlock(&f->fifo_lock);
2037
2038         pthread_join(f->thread, NULL);
2039         f->joined = 1;
2040
2041         while (av_fifo_size(f->fifo)) {
2042             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2043             av_free_packet(&pkt);
2044         }
2045         av_fifo_free(f->fifo);
2046     }
2047 }
2048
2049 static int init_input_threads(void)
2050 {
2051     int i, ret;
2052
2053     if (nb_input_files == 1)
2054         return 0;
2055
2056     for (i = 0; i < nb_input_files; i++) {
2057         InputFile *f = input_files[i];
2058
2059         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2060             return AVERROR(ENOMEM);
2061
2062         pthread_mutex_init(&f->fifo_lock, NULL);
2063         pthread_cond_init (&f->fifo_cond, NULL);
2064
2065         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2066             return AVERROR(ret);
2067     }
2068     return 0;
2069 }
2070
2071 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2072 {
2073     int ret = 0;
2074
2075     pthread_mutex_lock(&f->fifo_lock);
2076
2077     if (av_fifo_size(f->fifo)) {
2078         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2079         pthread_cond_signal(&f->fifo_cond);
2080     } else {
2081         if (f->finished)
2082             ret = AVERROR_EOF;
2083         else
2084             ret = AVERROR(EAGAIN);
2085     }
2086
2087     pthread_mutex_unlock(&f->fifo_lock);
2088
2089     return ret;
2090 }
2091 #endif
2092
2093 static int get_input_packet(InputFile *f, AVPacket *pkt)
2094 {
2095 #if HAVE_PTHREADS
2096     if (nb_input_files > 1)
2097         return get_input_packet_mt(f, pkt);
2098 #endif
2099     return av_read_frame(f->ctx, pkt);
2100 }
2101
2102 static int got_eagain(void)
2103 {
2104     int i;
2105     for (i = 0; i < nb_input_files; i++)
2106         if (input_files[i]->eagain)
2107             return 1;
2108     return 0;
2109 }
2110
2111 static void reset_eagain(void)
2112 {
2113     int i;
2114     for (i = 0; i < nb_input_files; i++)
2115         input_files[i]->eagain = 0;
2116 }
2117
2118 /**
2119  * Read one packet from an input file and send it for
2120  * - decoding -> lavfi (audio/video)
2121  * - decoding -> encoding -> muxing (subtitles)
2122  * - muxing (streamcopy)
2123  *
2124  * @return
2125  * - 0 -- one packet was read and processed
2126  * - AVERROR(EAGAIN) -- no packets were available for selected file,
2127  *   this function should be called again
2128  * - AVERROR_EOF -- this function should not be called again
2129  */
2130 static int process_input(void)
2131 {
2132     InputFile *ifile;
2133     AVFormatContext *is;
2134     InputStream *ist;
2135     AVPacket pkt;
2136     int ret, i, j;
2137
2138     /* select the stream that we must read now */
2139     ifile = select_input_file();
2140     /* if none, if is finished */
2141     if (!ifile) {
2142         if (got_eagain()) {
2143             reset_eagain();
2144             av_usleep(10000);
2145             return AVERROR(EAGAIN);
2146         }
2147         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from.\n");
2148         return AVERROR_EOF;
2149     }
2150
2151     is  = ifile->ctx;
2152     ret = get_input_packet(ifile, &pkt);
2153
2154     if (ret == AVERROR(EAGAIN)) {
2155         ifile->eagain = 1;
2156         return ret;
2157     }
2158     if (ret < 0) {
2159         if (ret != AVERROR_EOF) {
2160             print_error(is->filename, ret);
2161             if (exit_on_error)
2162                 exit_program(1);
2163         }
2164         ifile->eof_reached = 1;
2165
2166         for (i = 0; i < ifile->nb_streams; i++) {
2167             ist = input_streams[ifile->ist_index + i];
2168             if (ist->decoding_needed)
2169                 output_packet(ist, NULL);
2170
2171             /* mark all outputs that don't go through lavfi as finished */
2172             for (j = 0; j < nb_output_streams; j++) {
2173                 OutputStream *ost = output_streams[j];
2174
2175                 if (ost->source_index == ifile->ist_index + i &&
2176                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
2177                     ost->finished= 1;
2178             }
2179         }
2180
2181         return AVERROR(EAGAIN);
2182     }
2183
2184     reset_eagain();
2185
2186     if (do_pkt_dump) {
2187         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2188                          is->streams[pkt.stream_index]);
2189     }
2190     /* the following test is needed in case new streams appear
2191        dynamically in stream : we ignore them */
2192     if (pkt.stream_index >= ifile->nb_streams)
2193         goto discard_packet;
2194
2195     ist = input_streams[ifile->ist_index + pkt.stream_index];
2196     if (ist->discard)
2197         goto discard_packet;
2198
2199     if (pkt.dts != AV_NOPTS_VALUE)
2200         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2201     if (pkt.pts != AV_NOPTS_VALUE)
2202         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2203
2204     if (pkt.pts != AV_NOPTS_VALUE)
2205         pkt.pts *= ist->ts_scale;
2206     if (pkt.dts != AV_NOPTS_VALUE)
2207         pkt.dts *= ist->ts_scale;
2208
2209     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
2210         (is->iformat->flags & AVFMT_TS_DISCONT)) {
2211         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2212         int64_t delta   = pkt_dts - ist->next_dts;
2213
2214         if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
2215             ifile->ts_offset -= delta;
2216             av_log(NULL, AV_LOG_DEBUG,
2217                    "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2218                    delta, ifile->ts_offset);
2219             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2220             if (pkt.pts != AV_NOPTS_VALUE)
2221                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2222         }
2223     }
2224
2225     ret = output_packet(ist, &pkt);
2226     if (ret < 0) {
2227         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
2228                ist->file_index, ist->st->index);
2229         if (exit_on_error)
2230             exit_program(1);
2231     }
2232
2233 discard_packet:
2234     av_free_packet(&pkt);
2235
2236     return 0;
2237 }
2238
2239 /*
2240  * The following code is the main loop of the file converter
2241  */
2242 static int transcode(void)
2243 {
2244     int ret, i, need_input = 1;
2245     AVFormatContext *os;
2246     OutputStream *ost;
2247     InputStream *ist;
2248     int64_t timer_start;
2249
2250     ret = transcode_init();
2251     if (ret < 0)
2252         goto fail;
2253
2254     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2255     term_init();
2256
2257     timer_start = av_gettime();
2258
2259 #if HAVE_PTHREADS
2260     if ((ret = init_input_threads()) < 0)
2261         goto fail;
2262 #endif
2263
2264     while (!received_sigterm) {
2265         /* check if there's any stream where output is still needed */
2266         if (!need_output()) {
2267             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2268             break;
2269         }
2270
2271         /* read and process one input packet if needed */
2272         if (need_input) {
2273             ret = process_input();
2274             if (ret == AVERROR_EOF)
2275                 need_input = 0;
2276         }
2277
2278         ret = poll_filters();
2279         if (ret < 0) {
2280             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
2281                 continue;
2282
2283             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
2284             break;
2285         }
2286
2287         /* dump report by using the output first video and audio streams */
2288         print_report(0, timer_start);
2289     }
2290 #if HAVE_PTHREADS
2291     free_input_threads();
2292 #endif
2293
2294     /* at the end of stream, we must flush the decoder buffers */
2295     for (i = 0; i < nb_input_streams; i++) {
2296         ist = input_streams[i];
2297         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
2298             output_packet(ist, NULL);
2299         }
2300     }
2301     poll_filters();
2302     flush_encoders();
2303
2304     term_exit();
2305
2306     /* write the trailer if needed and close file */
2307     for (i = 0; i < nb_output_files; i++) {
2308         os = output_files[i]->ctx;
2309         av_write_trailer(os);
2310     }
2311
2312     /* dump report by using the first video and audio streams */
2313     print_report(1, timer_start);
2314
2315     /* close each encoder */
2316     for (i = 0; i < nb_output_streams; i++) {
2317         ost = output_streams[i];
2318         if (ost->encoding_needed) {
2319             av_freep(&ost->st->codec->stats_in);
2320             avcodec_close(ost->st->codec);
2321         }
2322     }
2323
2324     /* close each decoder */
2325     for (i = 0; i < nb_input_streams; i++) {
2326         ist = input_streams[i];
2327         if (ist->decoding_needed) {
2328             avcodec_close(ist->st->codec);
2329         }
2330     }
2331
2332     /* finished ! */
2333     ret = 0;
2334
2335  fail:
2336 #if HAVE_PTHREADS
2337     free_input_threads();
2338 #endif
2339
2340     if (output_streams) {
2341         for (i = 0; i < nb_output_streams; i++) {
2342             ost = output_streams[i];
2343             if (ost) {
2344                 if (ost->stream_copy)
2345                     av_freep(&ost->st->codec->extradata);
2346                 if (ost->logfile) {
2347                     fclose(ost->logfile);
2348                     ost->logfile = NULL;
2349                 }
2350                 av_freep(&ost->st->codec->subtitle_header);
2351                 av_free(ost->forced_kf_pts);
2352                 av_dict_free(&ost->opts);
2353             }
2354         }
2355     }
2356     return ret;
2357 }
2358
2359 static int64_t getutime(void)
2360 {
2361 #if HAVE_GETRUSAGE
2362     struct rusage rusage;
2363
2364     getrusage(RUSAGE_SELF, &rusage);
2365     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
2366 #elif HAVE_GETPROCESSTIMES
2367     HANDLE proc;
2368     FILETIME c, e, k, u;
2369     proc = GetCurrentProcess();
2370     GetProcessTimes(proc, &c, &e, &k, &u);
2371     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
2372 #else
2373     return av_gettime();
2374 #endif
2375 }
2376
2377 static int64_t getmaxrss(void)
2378 {
2379 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
2380     struct rusage rusage;
2381     getrusage(RUSAGE_SELF, &rusage);
2382     return (int64_t)rusage.ru_maxrss * 1024;
2383 #elif HAVE_GETPROCESSMEMORYINFO
2384     HANDLE proc;
2385     PROCESS_MEMORY_COUNTERS memcounters;
2386     proc = GetCurrentProcess();
2387     memcounters.cb = sizeof(memcounters);
2388     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
2389     return memcounters.PeakPagefileUsage;
2390 #else
2391     return 0;
2392 #endif
2393 }
2394
2395 static void parse_cpuflags(int argc, char **argv, const OptionDef *options)
2396 {
2397     int idx = locate_option(argc, argv, options, "cpuflags");
2398     if (idx && argv[idx + 1])
2399         opt_cpuflags("cpuflags", argv[idx + 1]);
2400 }
2401
2402 int main(int argc, char **argv)
2403 {
2404     OptionsContext o = { 0 };
2405     int64_t ti;
2406
2407     reset_options(&o);
2408
2409     av_log_set_flags(AV_LOG_SKIP_REPEATED);
2410     parse_loglevel(argc, argv, options);
2411
2412     avcodec_register_all();
2413 #if CONFIG_AVDEVICE
2414     avdevice_register_all();
2415 #endif
2416     avfilter_register_all();
2417     av_register_all();
2418     avformat_network_init();
2419
2420     show_banner();
2421
2422     parse_cpuflags(argc, argv, options);
2423
2424     /* parse options */
2425     parse_options(&o, argc, argv, options, opt_output_file);
2426
2427     if (nb_output_files <= 0 && nb_input_files == 0) {
2428         show_usage();
2429         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
2430         exit_program(1);
2431     }
2432
2433     /* file converter / grab */
2434     if (nb_output_files <= 0) {
2435         fprintf(stderr, "At least one output file must be specified\n");
2436         exit_program(1);
2437     }
2438
2439     ti = getutime();
2440     if (transcode() < 0)
2441         exit_program(1);
2442     ti = getutime() - ti;
2443     if (do_benchmark) {
2444         int maxrss = getmaxrss() / 1024;
2445         printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
2446     }
2447
2448     exit_program(0);
2449     return 0;
2450 }