avconv: split configuring filter configuration to a separate file.
[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->is_past_recording_time = 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 /* check for new output on any of the filtergraphs */
648 static int poll_filters(void)
649 {
650     AVFilterBufferRef *picref;
651     AVFrame *filtered_frame = NULL;
652     int i, frame_size;
653
654     for (i = 0; i < nb_output_streams; i++) {
655         OutputStream *ost = output_streams[i];
656         OutputFile    *of = output_files[ost->file_index];
657         int ret = 0;
658
659         if (!ost->filter)
660             continue;
661
662         if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
663             return AVERROR(ENOMEM);
664         } else
665             avcodec_get_frame_defaults(ost->filtered_frame);
666         filtered_frame = ost->filtered_frame;
667
668         while (ret >= 0 && !ost->is_past_recording_time) {
669             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
670                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
671                 ret = av_buffersink_read_samples(ost->filter->filter, &picref,
672                                                  ost->st->codec->frame_size);
673             else
674                 ret = av_buffersink_read(ost->filter->filter, &picref);
675
676             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
677                 break;
678             else if (ret < 0)
679                 return ret;
680
681             avfilter_copy_buf_props(filtered_frame, picref);
682             if (picref->pts != AV_NOPTS_VALUE) {
683                 filtered_frame->pts = av_rescale_q(picref->pts,
684                                                    ost->filter->filter->inputs[0]->time_base,
685                                                    ost->st->codec->time_base) -
686                                       av_rescale_q(of->start_time,
687                                                    AV_TIME_BASE_Q,
688                                                    ost->st->codec->time_base);
689
690                 if (of->start_time && filtered_frame->pts < 0) {
691                     avfilter_unref_buffer(picref);
692                     continue;
693                 }
694             }
695
696             switch (ost->filter->filter->inputs[0]->type) {
697             case AVMEDIA_TYPE_VIDEO:
698                 if (!ost->frame_aspect_ratio)
699                     ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
700
701                 do_video_out(of->ctx, ost, filtered_frame, &frame_size,
702                              same_quant ? ost->last_quality :
703                                           ost->st->codec->global_quality);
704                 if (vstats_filename && frame_size)
705                     do_video_stats(of->ctx, ost, frame_size);
706                 break;
707             case AVMEDIA_TYPE_AUDIO:
708                 do_audio_out(of->ctx, ost, filtered_frame);
709                 break;
710             default:
711                 // TODO support subtitle filters
712                 av_assert0(0);
713             }
714
715             avfilter_unref_buffer(picref);
716         }
717     }
718     return 0;
719 }
720
721 static void print_report(int is_last_report, int64_t timer_start)
722 {
723     char buf[1024];
724     OutputStream *ost;
725     AVFormatContext *oc;
726     int64_t total_size;
727     AVCodecContext *enc;
728     int frame_number, vid, i;
729     double bitrate, ti1, pts;
730     static int64_t last_time = -1;
731     static int qp_histogram[52];
732
733     if (!print_stats && !is_last_report)
734         return;
735
736     if (!is_last_report) {
737         int64_t cur_time;
738         /* display the report every 0.5 seconds */
739         cur_time = av_gettime();
740         if (last_time == -1) {
741             last_time = cur_time;
742             return;
743         }
744         if ((cur_time - last_time) < 500000)
745             return;
746         last_time = cur_time;
747     }
748
749
750     oc = output_files[0]->ctx;
751
752     total_size = avio_size(oc->pb);
753     if (total_size < 0) // FIXME improve avio_size() so it works with non seekable output too
754         total_size = avio_tell(oc->pb);
755
756     buf[0] = '\0';
757     ti1 = 1e10;
758     vid = 0;
759     for (i = 0; i < nb_output_streams; i++) {
760         float q = -1;
761         ost = output_streams[i];
762         enc = ost->st->codec;
763         if (!ost->stream_copy && enc->coded_frame)
764             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
765         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
766             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
767         }
768         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
769             float t = (av_gettime() - timer_start) / 1000000.0;
770
771             frame_number = ost->frame_number;
772             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
773                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
774             if (is_last_report)
775                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
776             if (qp_hist) {
777                 int j;
778                 int qp = lrintf(q);
779                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
780                     qp_histogram[qp]++;
781                 for (j = 0; j < 32; j++)
782                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
783             }
784             if (enc->flags&CODEC_FLAG_PSNR) {
785                 int j;
786                 double error, error_sum = 0;
787                 double scale, scale_sum = 0;
788                 char type[3] = { 'Y','U','V' };
789                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
790                 for (j = 0; j < 3; j++) {
791                     if (is_last_report) {
792                         error = enc->error[j];
793                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
794                     } else {
795                         error = enc->coded_frame->error[j];
796                         scale = enc->width * enc->height * 255.0 * 255.0;
797                     }
798                     if (j)
799                         scale /= 4;
800                     error_sum += error;
801                     scale_sum += scale;
802                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
803                 }
804                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
805             }
806             vid = 1;
807         }
808         /* compute min output value */
809         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
810         if ((pts < ti1) && (pts > 0))
811             ti1 = pts;
812     }
813     if (ti1 < 0.01)
814         ti1 = 0.01;
815
816     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
817
818     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
819             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
820             (double)total_size / 1024, ti1, bitrate);
821
822     if (nb_frames_dup || nb_frames_drop)
823         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
824                 nb_frames_dup, nb_frames_drop);
825
826     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
827
828     fflush(stderr);
829
830     if (is_last_report) {
831         int64_t raw= audio_size + video_size + extra_size;
832         av_log(NULL, AV_LOG_INFO, "\n");
833         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
834                video_size / 1024.0,
835                audio_size / 1024.0,
836                extra_size / 1024.0,
837                100.0 * (total_size - raw) / raw
838         );
839     }
840 }
841
842 static void flush_encoders(void)
843 {
844     int i, ret;
845
846     for (i = 0; i < nb_output_streams; i++) {
847         OutputStream   *ost = output_streams[i];
848         AVCodecContext *enc = ost->st->codec;
849         AVFormatContext *os = output_files[ost->file_index]->ctx;
850         int stop_encoding = 0;
851
852         if (!ost->encoding_needed)
853             continue;
854
855         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
856             continue;
857         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
858             continue;
859
860         for (;;) {
861             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
862             const char *desc;
863             int64_t *size;
864
865             switch (ost->st->codec->codec_type) {
866             case AVMEDIA_TYPE_AUDIO:
867                 encode = avcodec_encode_audio2;
868                 desc   = "Audio";
869                 size   = &audio_size;
870                 break;
871             case AVMEDIA_TYPE_VIDEO:
872                 encode = avcodec_encode_video2;
873                 desc   = "Video";
874                 size   = &video_size;
875                 break;
876             default:
877                 stop_encoding = 1;
878             }
879
880             if (encode) {
881                 AVPacket pkt;
882                 int got_packet;
883                 av_init_packet(&pkt);
884                 pkt.data = NULL;
885                 pkt.size = 0;
886
887                 ret = encode(enc, &pkt, NULL, &got_packet);
888                 if (ret < 0) {
889                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
890                     exit_program(1);
891                 }
892                 *size += ret;
893                 if (ost->logfile && enc->stats_out) {
894                     fprintf(ost->logfile, "%s", enc->stats_out);
895                 }
896                 if (!got_packet) {
897                     stop_encoding = 1;
898                     break;
899                 }
900                 if (pkt.pts != AV_NOPTS_VALUE)
901                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
902                 if (pkt.dts != AV_NOPTS_VALUE)
903                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
904                 write_frame(os, &pkt, ost);
905             }
906
907             if (stop_encoding)
908                 break;
909         }
910     }
911 }
912
913 /*
914  * Check whether a packet from ist should be written into ost at this time
915  */
916 static int check_output_constraints(InputStream *ist, OutputStream *ost)
917 {
918     OutputFile *of = output_files[ost->file_index];
919     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
920
921     if (ost->source_index != ist_index)
922         return 0;
923
924     if (of->start_time && ist->last_dts < of->start_time)
925         return 0;
926
927     return 1;
928 }
929
930 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
931 {
932     OutputFile *of = output_files[ost->file_index];
933     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
934     AVPacket opkt;
935
936     av_init_packet(&opkt);
937
938     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
939         !ost->copy_initial_nonkeyframes)
940         return;
941
942     if (of->recording_time != INT64_MAX &&
943         ist->last_dts >= of->recording_time + of->start_time) {
944         ost->is_past_recording_time = 1;
945         return;
946     }
947
948     /* force the input stream PTS */
949     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
950         audio_size += pkt->size;
951     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
952         video_size += pkt->size;
953         ost->sync_opts++;
954     }
955
956     if (pkt->pts != AV_NOPTS_VALUE)
957         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
958     else
959         opkt.pts = AV_NOPTS_VALUE;
960
961     if (pkt->dts == AV_NOPTS_VALUE)
962         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
963     else
964         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
965     opkt.dts -= ost_tb_start_time;
966
967     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
968     opkt.flags    = pkt->flags;
969
970     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
971     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
972        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
973        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
974        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
975        ) {
976         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
977             opkt.destruct = av_destruct_packet;
978     } else {
979         opkt.data = pkt->data;
980         opkt.size = pkt->size;
981     }
982
983     write_frame(of->ctx, &opkt, ost);
984     ost->st->codec->frame_number++;
985     av_free_packet(&opkt);
986 }
987
988 static void rate_emu_sleep(InputStream *ist)
989 {
990     if (input_files[ist->file_index]->rate_emu) {
991         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
992         int64_t now = av_gettime() - ist->start;
993         if (pts > now)
994             av_usleep(pts - now);
995     }
996 }
997
998 int guess_input_channel_layout(InputStream *ist)
999 {
1000     AVCodecContext *dec = ist->st->codec;
1001
1002     if (!dec->channel_layout) {
1003         char layout_name[256];
1004
1005         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1006         if (!dec->channel_layout)
1007             return 0;
1008         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1009                                      dec->channels, dec->channel_layout);
1010         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1011                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1012     }
1013     return 1;
1014 }
1015
1016 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1017 {
1018     AVFrame *decoded_frame;
1019     AVCodecContext *avctx = ist->st->codec;
1020     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
1021     int i, ret, resample_changed;
1022
1023     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1024         return AVERROR(ENOMEM);
1025     else
1026         avcodec_get_frame_defaults(ist->decoded_frame);
1027     decoded_frame = ist->decoded_frame;
1028
1029     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1030     if (ret < 0) {
1031         return ret;
1032     }
1033
1034     if (!*got_output) {
1035         /* no audio frame */
1036         if (!pkt->size)
1037             for (i = 0; i < ist->nb_filters; i++)
1038                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1039         return ret;
1040     }
1041
1042     /* if the decoder provides a pts, use it instead of the last packet pts.
1043        the decoder could be delaying output by a packet or more. */
1044     if (decoded_frame->pts != AV_NOPTS_VALUE)
1045         ist->next_dts = decoded_frame->pts;
1046     else if (pkt->pts != AV_NOPTS_VALUE) {
1047         decoded_frame->pts = pkt->pts;
1048         pkt->pts           = AV_NOPTS_VALUE;
1049     }
1050
1051     // preprocess audio (volume)
1052     if (audio_volume != 256) {
1053         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
1054         void *samples = decoded_frame->data[0];
1055         switch (avctx->sample_fmt) {
1056         case AV_SAMPLE_FMT_U8:
1057         {
1058             uint8_t *volp = samples;
1059             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1060                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
1061                 *volp++ = av_clip_uint8(v);
1062             }
1063             break;
1064         }
1065         case AV_SAMPLE_FMT_S16:
1066         {
1067             int16_t *volp = samples;
1068             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1069                 int v = ((*volp) * audio_volume + 128) >> 8;
1070                 *volp++ = av_clip_int16(v);
1071             }
1072             break;
1073         }
1074         case AV_SAMPLE_FMT_S32:
1075         {
1076             int32_t *volp = samples;
1077             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1078                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
1079                 *volp++ = av_clipl_int32(v);
1080             }
1081             break;
1082         }
1083         case AV_SAMPLE_FMT_FLT:
1084         {
1085             float *volp = samples;
1086             float scale = audio_volume / 256.f;
1087             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1088                 *volp++ *= scale;
1089             }
1090             break;
1091         }
1092         case AV_SAMPLE_FMT_DBL:
1093         {
1094             double *volp = samples;
1095             double scale = audio_volume / 256.;
1096             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1097                 *volp++ *= scale;
1098             }
1099             break;
1100         }
1101         default:
1102             av_log(NULL, AV_LOG_FATAL,
1103                    "Audio volume adjustment on sample format %s is not supported.\n",
1104                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
1105             exit_program(1);
1106         }
1107     }
1108
1109     rate_emu_sleep(ist);
1110
1111     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1112                        ist->resample_channels       != avctx->channels               ||
1113                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1114                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1115     if (resample_changed) {
1116         char layout1[64], layout2[64];
1117
1118         if (!guess_input_channel_layout(ist)) {
1119             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1120                    "layout for Input Stream #%d.%d\n", ist->file_index,
1121                    ist->st->index);
1122             exit_program(1);
1123         }
1124         decoded_frame->channel_layout = avctx->channel_layout;
1125
1126         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1127                                      ist->resample_channel_layout);
1128         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1129                                      decoded_frame->channel_layout);
1130
1131         av_log(NULL, AV_LOG_INFO,
1132                "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",
1133                ist->file_index, ist->st->index,
1134                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1135                ist->resample_channels, layout1,
1136                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1137                avctx->channels, layout2);
1138
1139         ist->resample_sample_fmt     = decoded_frame->format;
1140         ist->resample_sample_rate    = decoded_frame->sample_rate;
1141         ist->resample_channel_layout = decoded_frame->channel_layout;
1142         ist->resample_channels       = avctx->channels;
1143
1144         for (i = 0; i < nb_filtergraphs; i++)
1145             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1146                 configure_filtergraph(filtergraphs[i]) < 0) {
1147                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1148                 exit_program(1);
1149             }
1150     }
1151
1152     if (decoded_frame->pts != AV_NOPTS_VALUE)
1153         decoded_frame->pts = av_rescale_q(decoded_frame->pts,
1154                                           ist->st->time_base,
1155                                           (AVRational){1, ist->st->codec->sample_rate});
1156     for (i = 0; i < ist->nb_filters; i++)
1157         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1158
1159     return ret;
1160 }
1161
1162 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1163 {
1164     AVFrame *decoded_frame;
1165     void *buffer_to_free = NULL;
1166     int i, ret = 0, resample_changed;
1167     float quality;
1168
1169     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1170         return AVERROR(ENOMEM);
1171     else
1172         avcodec_get_frame_defaults(ist->decoded_frame);
1173     decoded_frame = ist->decoded_frame;
1174
1175     ret = avcodec_decode_video2(ist->st->codec,
1176                                 decoded_frame, got_output, pkt);
1177     if (ret < 0)
1178         return ret;
1179
1180     quality = same_quant ? decoded_frame->quality : 0;
1181     if (!*got_output) {
1182         /* no picture yet */
1183         if (!pkt->size)
1184             for (i = 0; i < ist->nb_filters; i++)
1185                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1186         return ret;
1187     }
1188     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
1189                                            decoded_frame->pkt_dts);
1190     pkt->size = 0;
1191     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
1192
1193     rate_emu_sleep(ist);
1194
1195     if (ist->st->sample_aspect_ratio.num)
1196         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1197
1198     resample_changed = ist->resample_width   != decoded_frame->width  ||
1199                        ist->resample_height  != decoded_frame->height ||
1200                        ist->resample_pix_fmt != decoded_frame->format;
1201     if (resample_changed) {
1202         av_log(NULL, AV_LOG_INFO,
1203                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1204                ist->file_index, ist->st->index,
1205                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1206                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1207
1208         ist->resample_width   = decoded_frame->width;
1209         ist->resample_height  = decoded_frame->height;
1210         ist->resample_pix_fmt = decoded_frame->format;
1211
1212         for (i = 0; i < nb_filtergraphs; i++)
1213             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1214                 configure_filtergraph(filtergraphs[i]) < 0) {
1215                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1216                 exit_program(1);
1217             }
1218     }
1219
1220     for (i = 0; i < ist->nb_filters; i++) {
1221         // XXX what an ugly hack
1222         if (ist->filters[i]->graph->nb_outputs == 1)
1223             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
1224
1225         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
1226             FrameBuffer      *buf = decoded_frame->opaque;
1227             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
1228                                         decoded_frame->data, decoded_frame->linesize,
1229                                         AV_PERM_READ | AV_PERM_PRESERVE,
1230                                         ist->st->codec->width, ist->st->codec->height,
1231                                         ist->st->codec->pix_fmt);
1232
1233             avfilter_copy_frame_props(fb, decoded_frame);
1234             fb->buf->priv           = buf;
1235             fb->buf->free           = filter_release_buffer;
1236
1237             buf->refcount++;
1238             av_buffersrc_buffer(ist->filters[i]->filter, fb);
1239         } else
1240             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1241     }
1242
1243     av_free(buffer_to_free);
1244     return ret;
1245 }
1246
1247 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1248 {
1249     AVSubtitle subtitle;
1250     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1251                                           &subtitle, got_output, pkt);
1252     if (ret < 0)
1253         return ret;
1254     if (!*got_output)
1255         return ret;
1256
1257     rate_emu_sleep(ist);
1258
1259     for (i = 0; i < nb_output_streams; i++) {
1260         OutputStream *ost = output_streams[i];
1261
1262         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1263             continue;
1264
1265         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
1266     }
1267
1268     avsubtitle_free(&subtitle);
1269     return ret;
1270 }
1271
1272 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1273 static int output_packet(InputStream *ist, const AVPacket *pkt)
1274 {
1275     int i;
1276     int got_output;
1277     AVPacket avpkt;
1278
1279     if (ist->next_dts == AV_NOPTS_VALUE)
1280         ist->next_dts = ist->last_dts;
1281
1282     if (pkt == NULL) {
1283         /* EOF handling */
1284         av_init_packet(&avpkt);
1285         avpkt.data = NULL;
1286         avpkt.size = 0;
1287         goto handle_eof;
1288     } else {
1289         avpkt = *pkt;
1290     }
1291
1292     if (pkt->dts != AV_NOPTS_VALUE)
1293         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1294
1295     // while we have more to decode or while the decoder did output something on EOF
1296     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1297         int ret = 0;
1298     handle_eof:
1299
1300         ist->last_dts = ist->next_dts;
1301
1302         if (avpkt.size && avpkt.size != pkt->size) {
1303             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1304                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1305             ist->showed_multi_packet_warning = 1;
1306         }
1307
1308         switch (ist->st->codec->codec_type) {
1309         case AVMEDIA_TYPE_AUDIO:
1310             ret = decode_audio    (ist, &avpkt, &got_output);
1311             break;
1312         case AVMEDIA_TYPE_VIDEO:
1313             ret = decode_video    (ist, &avpkt, &got_output);
1314             if (avpkt.duration)
1315                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1316             else if (ist->st->avg_frame_rate.num)
1317                 ist->next_dts += av_rescale_q(1, av_inv_q(ist->st->avg_frame_rate),
1318                                               AV_TIME_BASE_Q);
1319             else if (ist->st->codec->time_base.num != 0) {
1320                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
1321                                                    ist->st->codec->ticks_per_frame;
1322                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
1323             }
1324             break;
1325         case AVMEDIA_TYPE_SUBTITLE:
1326             ret = transcode_subtitles(ist, &avpkt, &got_output);
1327             break;
1328         default:
1329             return -1;
1330         }
1331
1332         if (ret < 0)
1333             return ret;
1334         // touch data and size only if not EOF
1335         if (pkt) {
1336             avpkt.data += ret;
1337             avpkt.size -= ret;
1338         }
1339         if (!got_output) {
1340             continue;
1341         }
1342     }
1343
1344     /* handle stream copy */
1345     if (!ist->decoding_needed) {
1346         rate_emu_sleep(ist);
1347         ist->last_dts = ist->next_dts;
1348         switch (ist->st->codec->codec_type) {
1349         case AVMEDIA_TYPE_AUDIO:
1350             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1351                              ist->st->codec->sample_rate;
1352             break;
1353         case AVMEDIA_TYPE_VIDEO:
1354             if (ist->st->codec->time_base.num != 0) {
1355                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
1356                 ist->next_dts += ((int64_t)AV_TIME_BASE *
1357                                   ist->st->codec->time_base.num * ticks) /
1358                                   ist->st->codec->time_base.den;
1359             }
1360             break;
1361         }
1362     }
1363     for (i = 0; pkt && i < nb_output_streams; i++) {
1364         OutputStream *ost = output_streams[i];
1365
1366         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1367             continue;
1368
1369         do_streamcopy(ist, ost, pkt);
1370     }
1371
1372     return 0;
1373 }
1374
1375 static void print_sdp(void)
1376 {
1377     char sdp[2048];
1378     int i;
1379     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
1380
1381     if (!avc)
1382         exit_program(1);
1383     for (i = 0; i < nb_output_files; i++)
1384         avc[i] = output_files[i]->ctx;
1385
1386     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
1387     printf("SDP:\n%s\n", sdp);
1388     fflush(stdout);
1389     av_freep(&avc);
1390 }
1391
1392 static int init_input_stream(int ist_index, char *error, int error_len)
1393 {
1394     int i;
1395     InputStream *ist = input_streams[ist_index];
1396     if (ist->decoding_needed) {
1397         AVCodec *codec = ist->dec;
1398         if (!codec) {
1399             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
1400                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
1401             return AVERROR(EINVAL);
1402         }
1403
1404         /* update requested sample format for the decoder based on the
1405            corresponding encoder sample format */
1406         for (i = 0; i < nb_output_streams; i++) {
1407             OutputStream *ost = output_streams[i];
1408             if (ost->source_index == ist_index) {
1409                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
1410                 break;
1411             }
1412         }
1413
1414         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
1415             ist->st->codec->get_buffer     = codec_get_buffer;
1416             ist->st->codec->release_buffer = codec_release_buffer;
1417             ist->st->codec->opaque         = &ist->buffer_pool;
1418         }
1419
1420         if (!av_dict_get(ist->opts, "threads", NULL, 0))
1421             av_dict_set(&ist->opts, "threads", "auto", 0);
1422         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
1423             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
1424                     ist->file_index, ist->st->index);
1425             return AVERROR(EINVAL);
1426         }
1427         assert_codec_experimental(ist->st->codec, 0);
1428         assert_avoptions(ist->opts);
1429     }
1430
1431     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;
1432     ist->next_dts = AV_NOPTS_VALUE;
1433     init_pts_correction(&ist->pts_ctx);
1434     ist->is_start = 1;
1435
1436     return 0;
1437 }
1438
1439 static InputStream *get_input_stream(OutputStream *ost)
1440 {
1441     if (ost->source_index >= 0)
1442         return input_streams[ost->source_index];
1443
1444     if (ost->filter) {
1445         FilterGraph *fg = ost->filter->graph;
1446         int i;
1447
1448         for (i = 0; i < fg->nb_inputs; i++)
1449             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
1450                 return fg->inputs[i]->ist;
1451     }
1452
1453     return NULL;
1454 }
1455
1456 static void parse_forced_key_frames(char *kf, OutputStream *ost,
1457                                     AVCodecContext *avctx)
1458 {
1459     char *p;
1460     int n = 1, i;
1461     int64_t t;
1462
1463     for (p = kf; *p; p++)
1464         if (*p == ',')
1465             n++;
1466     ost->forced_kf_count = n;
1467     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
1468     if (!ost->forced_kf_pts) {
1469         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
1470         exit_program(1);
1471     }
1472
1473     p = kf;
1474     for (i = 0; i < n; i++) {
1475         char *next = strchr(p, ',');
1476
1477         if (next)
1478             *next++ = 0;
1479
1480         t = parse_time_or_die("force_key_frames", p, 1);
1481         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
1482
1483         p = next;
1484     }
1485 }
1486
1487 static int transcode_init(void)
1488 {
1489     int ret = 0, i, j, k;
1490     AVFormatContext *oc;
1491     AVCodecContext *codec, *icodec;
1492     OutputStream *ost;
1493     InputStream *ist;
1494     char error[1024];
1495     int want_sdp = 1;
1496
1497     /* init framerate emulation */
1498     for (i = 0; i < nb_input_files; i++) {
1499         InputFile *ifile = input_files[i];
1500         if (ifile->rate_emu)
1501             for (j = 0; j < ifile->nb_streams; j++)
1502                 input_streams[j + ifile->ist_index]->start = av_gettime();
1503     }
1504
1505     /* output stream init */
1506     for (i = 0; i < nb_output_files; i++) {
1507         oc = output_files[i]->ctx;
1508         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
1509             av_dump_format(oc, i, oc->filename, 1);
1510             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
1511             return AVERROR(EINVAL);
1512         }
1513     }
1514
1515     /* init complex filtergraphs */
1516     for (i = 0; i < nb_filtergraphs; i++)
1517         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
1518             return ret;
1519
1520     /* for each output stream, we compute the right encoding parameters */
1521     for (i = 0; i < nb_output_streams; i++) {
1522         ost = output_streams[i];
1523         oc  = output_files[ost->file_index]->ctx;
1524         ist = get_input_stream(ost);
1525
1526         if (ost->attachment_filename)
1527             continue;
1528
1529         codec  = ost->st->codec;
1530
1531         if (ist) {
1532             icodec = ist->st->codec;
1533
1534             ost->st->disposition          = ist->st->disposition;
1535             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
1536             codec->chroma_sample_location = icodec->chroma_sample_location;
1537         }
1538
1539         if (ost->stream_copy) {
1540             uint64_t extra_size;
1541
1542             av_assert0(ist && !ost->filter);
1543
1544             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
1545
1546             if (extra_size > INT_MAX) {
1547                 return AVERROR(EINVAL);
1548             }
1549
1550             /* if stream_copy is selected, no need to decode or encode */
1551             codec->codec_id   = icodec->codec_id;
1552             codec->codec_type = icodec->codec_type;
1553
1554             if (!codec->codec_tag) {
1555                 if (!oc->oformat->codec_tag ||
1556                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
1557                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
1558                     codec->codec_tag = icodec->codec_tag;
1559             }
1560
1561             codec->bit_rate       = icodec->bit_rate;
1562             codec->rc_max_rate    = icodec->rc_max_rate;
1563             codec->rc_buffer_size = icodec->rc_buffer_size;
1564             codec->field_order    = icodec->field_order;
1565             codec->extradata      = av_mallocz(extra_size);
1566             if (!codec->extradata) {
1567                 return AVERROR(ENOMEM);
1568             }
1569             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
1570             codec->extradata_size = icodec->extradata_size;
1571             if (!copy_tb) {
1572                 codec->time_base      = icodec->time_base;
1573                 codec->time_base.num *= icodec->ticks_per_frame;
1574                 av_reduce(&codec->time_base.num, &codec->time_base.den,
1575                           codec->time_base.num, codec->time_base.den, INT_MAX);
1576             } else
1577                 codec->time_base = ist->st->time_base;
1578
1579             switch (codec->codec_type) {
1580             case AVMEDIA_TYPE_AUDIO:
1581                 if (audio_volume != 256) {
1582                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
1583                     exit_program(1);
1584                 }
1585                 codec->channel_layout     = icodec->channel_layout;
1586                 codec->sample_rate        = icodec->sample_rate;
1587                 codec->channels           = icodec->channels;
1588                 codec->frame_size         = icodec->frame_size;
1589                 codec->audio_service_type = icodec->audio_service_type;
1590                 codec->block_align        = icodec->block_align;
1591                 break;
1592             case AVMEDIA_TYPE_VIDEO:
1593                 codec->pix_fmt            = icodec->pix_fmt;
1594                 codec->width              = icodec->width;
1595                 codec->height             = icodec->height;
1596                 codec->has_b_frames       = icodec->has_b_frames;
1597                 if (!codec->sample_aspect_ratio.num) {
1598                     codec->sample_aspect_ratio   =
1599                     ost->st->sample_aspect_ratio =
1600                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
1601                         ist->st->codec->sample_aspect_ratio.num ?
1602                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
1603                 }
1604                 break;
1605             case AVMEDIA_TYPE_SUBTITLE:
1606                 codec->width  = icodec->width;
1607                 codec->height = icodec->height;
1608                 break;
1609             case AVMEDIA_TYPE_DATA:
1610             case AVMEDIA_TYPE_ATTACHMENT:
1611                 break;
1612             default:
1613                 abort();
1614             }
1615         } else {
1616             if (!ost->enc) {
1617                 /* should only happen when a default codec is not present. */
1618                 snprintf(error, sizeof(error), "Automatic encoder selection "
1619                          "failed for output stream #%d:%d. Default encoder for "
1620                          "format %s is probably disabled. Please choose an "
1621                          "encoder manually.\n", ost->file_index, ost->index,
1622                          oc->oformat->name);
1623                 ret = AVERROR(EINVAL);
1624                 goto dump_format;
1625             }
1626
1627             if (ist)
1628                 ist->decoding_needed = 1;
1629             ost->encoding_needed = 1;
1630
1631             /*
1632              * We want CFR output if and only if one of those is true:
1633              * 1) user specified output framerate with -r
1634              * 2) user specified -vsync cfr
1635              * 3) output format is CFR and the user didn't force vsync to
1636              *    something else than CFR
1637              *
1638              * in such a case, set ost->frame_rate
1639              */
1640             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1641                 !ost->frame_rate.num && ist &&
1642                 (video_sync_method ==  VSYNC_CFR ||
1643                  (video_sync_method ==  VSYNC_AUTO &&
1644                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
1645                 ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
1646                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
1647                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
1648                     ost->frame_rate = ost->enc->supported_framerates[idx];
1649                 }
1650             }
1651
1652             if (!ost->filter &&
1653                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
1654                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
1655                     FilterGraph *fg;
1656                     fg = init_simple_filtergraph(ist, ost);
1657                     if (configure_filtergraph(fg)) {
1658                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
1659                         exit(1);
1660                     }
1661             }
1662
1663             switch (codec->codec_type) {
1664             case AVMEDIA_TYPE_AUDIO:
1665                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
1666                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
1667                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
1668                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
1669                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
1670                 break;
1671             case AVMEDIA_TYPE_VIDEO:
1672                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
1673
1674                 codec->width  = ost->filter->filter->inputs[0]->w;
1675                 codec->height = ost->filter->filter->inputs[0]->h;
1676                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
1677                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
1678                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
1679                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
1680                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
1681
1682                 if (codec->width   != icodec->width  ||
1683                     codec->height  != icodec->height ||
1684                     codec->pix_fmt != icodec->pix_fmt) {
1685                     codec->bits_per_raw_sample = 0;
1686                 }
1687
1688                 if (ost->forced_keyframes)
1689                     parse_forced_key_frames(ost->forced_keyframes, ost,
1690                                             ost->st->codec);
1691                 break;
1692             case AVMEDIA_TYPE_SUBTITLE:
1693                 codec->time_base = (AVRational){1, 1000};
1694                 break;
1695             default:
1696                 abort();
1697                 break;
1698             }
1699             /* two pass mode */
1700             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
1701                 char logfilename[1024];
1702                 FILE *f;
1703
1704                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
1705                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
1706                          i);
1707                 if (!strcmp(ost->enc->name, "libx264")) {
1708                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
1709                 } else {
1710                     if (codec->flags & CODEC_FLAG_PASS1) {
1711                         f = fopen(logfilename, "wb");
1712                         if (!f) {
1713                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
1714                                    logfilename, strerror(errno));
1715                             exit_program(1);
1716                         }
1717                         ost->logfile = f;
1718                     } else {
1719                         char  *logbuffer;
1720                         size_t logbuffer_size;
1721                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
1722                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
1723                                    logfilename);
1724                             exit_program(1);
1725                         }
1726                         codec->stats_in = logbuffer;
1727                     }
1728                 }
1729             }
1730         }
1731     }
1732
1733     /* open each encoder */
1734     for (i = 0; i < nb_output_streams; i++) {
1735         ost = output_streams[i];
1736         if (ost->encoding_needed) {
1737             AVCodec      *codec = ost->enc;
1738             AVCodecContext *dec = NULL;
1739
1740             if ((ist = get_input_stream(ost)))
1741                 dec = ist->st->codec;
1742             if (dec && dec->subtitle_header) {
1743                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
1744                 if (!ost->st->codec->subtitle_header) {
1745                     ret = AVERROR(ENOMEM);
1746                     goto dump_format;
1747                 }
1748                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
1749                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
1750             }
1751             if (!av_dict_get(ost->opts, "threads", NULL, 0))
1752                 av_dict_set(&ost->opts, "threads", "auto", 0);
1753             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
1754                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
1755                         ost->file_index, ost->index);
1756                 ret = AVERROR(EINVAL);
1757                 goto dump_format;
1758             }
1759             assert_codec_experimental(ost->st->codec, 1);
1760             assert_avoptions(ost->opts);
1761             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
1762                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
1763                                              "It takes bits/s as argument, not kbits/s\n");
1764             extra_size += ost->st->codec->extradata_size;
1765
1766             if (ost->st->codec->me_threshold)
1767                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
1768         }
1769     }
1770
1771     /* init input streams */
1772     for (i = 0; i < nb_input_streams; i++)
1773         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
1774             goto dump_format;
1775
1776     /* discard unused programs */
1777     for (i = 0; i < nb_input_files; i++) {
1778         InputFile *ifile = input_files[i];
1779         for (j = 0; j < ifile->ctx->nb_programs; j++) {
1780             AVProgram *p = ifile->ctx->programs[j];
1781             int discard  = AVDISCARD_ALL;
1782
1783             for (k = 0; k < p->nb_stream_indexes; k++)
1784                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
1785                     discard = AVDISCARD_DEFAULT;
1786                     break;
1787                 }
1788             p->discard = discard;
1789         }
1790     }
1791
1792     /* open files and write file headers */
1793     for (i = 0; i < nb_output_files; i++) {
1794         oc = output_files[i]->ctx;
1795         oc->interrupt_callback = int_cb;
1796         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
1797             char errbuf[128];
1798             const char *errbuf_ptr = errbuf;
1799             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
1800                 errbuf_ptr = strerror(AVUNERROR(ret));
1801             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
1802             ret = AVERROR(EINVAL);
1803             goto dump_format;
1804         }
1805         assert_avoptions(output_files[i]->opts);
1806         if (strcmp(oc->oformat->name, "rtp")) {
1807             want_sdp = 0;
1808         }
1809     }
1810
1811  dump_format:
1812     /* dump the file output parameters - cannot be done before in case
1813        of stream copy */
1814     for (i = 0; i < nb_output_files; i++) {
1815         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
1816     }
1817
1818     /* dump the stream mapping */
1819     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
1820     for (i = 0; i < nb_input_streams; i++) {
1821         ist = input_streams[i];
1822
1823         for (j = 0; j < ist->nb_filters; j++) {
1824             if (ist->filters[j]->graph->graph_desc) {
1825                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
1826                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
1827                        ist->filters[j]->name);
1828                 if (nb_filtergraphs > 1)
1829                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
1830                 av_log(NULL, AV_LOG_INFO, "\n");
1831             }
1832         }
1833     }
1834
1835     for (i = 0; i < nb_output_streams; i++) {
1836         ost = output_streams[i];
1837
1838         if (ost->attachment_filename) {
1839             /* an attached file */
1840             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
1841                    ost->attachment_filename, ost->file_index, ost->index);
1842             continue;
1843         }
1844
1845         if (ost->filter && ost->filter->graph->graph_desc) {
1846             /* output from a complex graph */
1847             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
1848             if (nb_filtergraphs > 1)
1849                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
1850
1851             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
1852                    ost->index, ost->enc ? ost->enc->name : "?");
1853             continue;
1854         }
1855
1856         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
1857                input_streams[ost->source_index]->file_index,
1858                input_streams[ost->source_index]->st->index,
1859                ost->file_index,
1860                ost->index);
1861         if (ost->sync_ist != input_streams[ost->source_index])
1862             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
1863                    ost->sync_ist->file_index,
1864                    ost->sync_ist->st->index);
1865         if (ost->stream_copy)
1866             av_log(NULL, AV_LOG_INFO, " (copy)");
1867         else
1868             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
1869                    input_streams[ost->source_index]->dec->name : "?",
1870                    ost->enc ? ost->enc->name : "?");
1871         av_log(NULL, AV_LOG_INFO, "\n");
1872     }
1873
1874     if (ret) {
1875         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
1876         return ret;
1877     }
1878
1879     if (want_sdp) {
1880         print_sdp();
1881     }
1882
1883     return 0;
1884 }
1885
1886 /**
1887  * @return 1 if there are still streams where more output is wanted,
1888  *         0 otherwise
1889  */
1890 static int need_output(void)
1891 {
1892     int i;
1893
1894     for (i = 0; i < nb_output_streams; i++) {
1895         OutputStream *ost    = output_streams[i];
1896         OutputFile *of       = output_files[ost->file_index];
1897         AVFormatContext *os  = output_files[ost->file_index]->ctx;
1898
1899         if (ost->is_past_recording_time ||
1900             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
1901             continue;
1902         if (ost->frame_number >= ost->max_frames) {
1903             int j;
1904             for (j = 0; j < of->ctx->nb_streams; j++)
1905                 output_streams[of->ost_index + j]->is_past_recording_time = 1;
1906             continue;
1907         }
1908
1909         return 1;
1910     }
1911
1912     return 0;
1913 }
1914
1915 static int select_input_file(uint8_t *no_packet)
1916 {
1917     int64_t ipts_min = INT64_MAX;
1918     int i, file_index = -1;
1919
1920     for (i = 0; i < nb_input_streams; i++) {
1921         InputStream *ist = input_streams[i];
1922         int64_t ipts     = ist->last_dts;
1923
1924         if (ist->discard || no_packet[ist->file_index])
1925             continue;
1926         if (!input_files[ist->file_index]->eof_reached) {
1927             if (ipts < ipts_min) {
1928                 ipts_min = ipts;
1929                 file_index = ist->file_index;
1930             }
1931         }
1932     }
1933
1934     return file_index;
1935 }
1936
1937 #if HAVE_PTHREADS
1938 static void *input_thread(void *arg)
1939 {
1940     InputFile *f = arg;
1941     int ret = 0;
1942
1943     while (!transcoding_finished && ret >= 0) {
1944         AVPacket pkt;
1945         ret = av_read_frame(f->ctx, &pkt);
1946
1947         if (ret == AVERROR(EAGAIN)) {
1948             av_usleep(10000);
1949             ret = 0;
1950             continue;
1951         } else if (ret < 0)
1952             break;
1953
1954         pthread_mutex_lock(&f->fifo_lock);
1955         while (!av_fifo_space(f->fifo))
1956             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
1957
1958         av_dup_packet(&pkt);
1959         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
1960
1961         pthread_mutex_unlock(&f->fifo_lock);
1962     }
1963
1964     f->finished = 1;
1965     return NULL;
1966 }
1967
1968 static void free_input_threads(void)
1969 {
1970     int i;
1971
1972     if (nb_input_files == 1)
1973         return;
1974
1975     transcoding_finished = 1;
1976
1977     for (i = 0; i < nb_input_files; i++) {
1978         InputFile *f = input_files[i];
1979         AVPacket pkt;
1980
1981         if (!f->fifo || f->joined)
1982             continue;
1983
1984         pthread_mutex_lock(&f->fifo_lock);
1985         while (av_fifo_size(f->fifo)) {
1986             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
1987             av_free_packet(&pkt);
1988         }
1989         pthread_cond_signal(&f->fifo_cond);
1990         pthread_mutex_unlock(&f->fifo_lock);
1991
1992         pthread_join(f->thread, NULL);
1993         f->joined = 1;
1994
1995         while (av_fifo_size(f->fifo)) {
1996             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
1997             av_free_packet(&pkt);
1998         }
1999         av_fifo_free(f->fifo);
2000     }
2001 }
2002
2003 static int init_input_threads(void)
2004 {
2005     int i, ret;
2006
2007     if (nb_input_files == 1)
2008         return 0;
2009
2010     for (i = 0; i < nb_input_files; i++) {
2011         InputFile *f = input_files[i];
2012
2013         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2014             return AVERROR(ENOMEM);
2015
2016         pthread_mutex_init(&f->fifo_lock, NULL);
2017         pthread_cond_init (&f->fifo_cond, NULL);
2018
2019         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2020             return AVERROR(ret);
2021     }
2022     return 0;
2023 }
2024
2025 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2026 {
2027     int ret = 0;
2028
2029     pthread_mutex_lock(&f->fifo_lock);
2030
2031     if (av_fifo_size(f->fifo)) {
2032         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2033         pthread_cond_signal(&f->fifo_cond);
2034     } else {
2035         if (f->finished)
2036             ret = AVERROR_EOF;
2037         else
2038             ret = AVERROR(EAGAIN);
2039     }
2040
2041     pthread_mutex_unlock(&f->fifo_lock);
2042
2043     return ret;
2044 }
2045 #endif
2046
2047 static int get_input_packet(InputFile *f, AVPacket *pkt)
2048 {
2049 #if HAVE_PTHREADS
2050     if (nb_input_files > 1)
2051         return get_input_packet_mt(f, pkt);
2052 #endif
2053     return av_read_frame(f->ctx, pkt);
2054 }
2055
2056 /*
2057  * The following code is the main loop of the file converter
2058  */
2059 static int transcode(void)
2060 {
2061     int ret, i;
2062     AVFormatContext *is, *os;
2063     OutputStream *ost;
2064     InputStream *ist;
2065     uint8_t *no_packet;
2066     int no_packet_count = 0;
2067     int64_t timer_start;
2068
2069     if (!(no_packet = av_mallocz(nb_input_files)))
2070         exit_program(1);
2071
2072     ret = transcode_init();
2073     if (ret < 0)
2074         goto fail;
2075
2076     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2077     term_init();
2078
2079     timer_start = av_gettime();
2080
2081 #if HAVE_PTHREADS
2082     if ((ret = init_input_threads()) < 0)
2083         goto fail;
2084 #endif
2085
2086     for (; received_sigterm == 0;) {
2087         int file_index, ist_index;
2088         AVPacket pkt;
2089
2090         /* check if there's any stream where output is still needed */
2091         if (!need_output()) {
2092             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2093             break;
2094         }
2095
2096         /* select the stream that we must read now */
2097         file_index = select_input_file(no_packet);
2098         /* if none, if is finished */
2099         if (file_index < 0) {
2100             if (no_packet_count) {
2101                 no_packet_count = 0;
2102                 memset(no_packet, 0, nb_input_files);
2103                 av_usleep(10000);
2104                 continue;
2105             }
2106             av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
2107             break;
2108         }
2109
2110         is  = input_files[file_index]->ctx;
2111         ret = get_input_packet(input_files[file_index], &pkt);
2112
2113         if (ret == AVERROR(EAGAIN)) {
2114             no_packet[file_index] = 1;
2115             no_packet_count++;
2116             continue;
2117         }
2118         if (ret < 0) {
2119             if (ret != AVERROR_EOF) {
2120                 print_error(is->filename, ret);
2121                 if (exit_on_error)
2122                     exit_program(1);
2123             }
2124             input_files[file_index]->eof_reached = 1;
2125
2126             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
2127                 ist = input_streams[input_files[file_index]->ist_index + i];
2128                 if (ist->decoding_needed)
2129                     output_packet(ist, NULL);
2130             }
2131
2132             if (opt_shortest)
2133                 break;
2134             else
2135                 continue;
2136         }
2137
2138         no_packet_count = 0;
2139         memset(no_packet, 0, nb_input_files);
2140
2141         if (do_pkt_dump) {
2142             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2143                              is->streams[pkt.stream_index]);
2144         }
2145         /* the following test is needed in case new streams appear
2146            dynamically in stream : we ignore them */
2147         if (pkt.stream_index >= input_files[file_index]->nb_streams)
2148             goto discard_packet;
2149         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
2150         ist = input_streams[ist_index];
2151         if (ist->discard)
2152             goto discard_packet;
2153
2154         if (pkt.dts != AV_NOPTS_VALUE)
2155             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2156         if (pkt.pts != AV_NOPTS_VALUE)
2157             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2158
2159         if (pkt.pts != AV_NOPTS_VALUE)
2160             pkt.pts *= ist->ts_scale;
2161         if (pkt.dts != AV_NOPTS_VALUE)
2162             pkt.dts *= ist->ts_scale;
2163
2164         //fprintf(stderr, "next:%"PRId64" dts:%"PRId64" off:%"PRId64" %d\n",
2165         //        ist->next_dts,
2166         //        pkt.dts, input_files[ist->file_index].ts_offset,
2167         //        ist->st->codec->codec_type);
2168         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE
2169             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
2170             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2171             int64_t delta   = pkt_dts - ist->next_dts;
2172             if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
2173                 input_files[ist->file_index]->ts_offset -= delta;
2174                 av_log(NULL, AV_LOG_DEBUG,
2175                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2176                        delta, input_files[ist->file_index]->ts_offset);
2177                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2178                 if (pkt.pts != AV_NOPTS_VALUE)
2179                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2180             }
2181         }
2182
2183         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
2184         if (output_packet(ist, &pkt) < 0 || poll_filters() < 0) {
2185             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
2186                    ist->file_index, ist->st->index);
2187             if (exit_on_error)
2188                 exit_program(1);
2189             av_free_packet(&pkt);
2190             continue;
2191         }
2192
2193     discard_packet:
2194         av_free_packet(&pkt);
2195
2196         /* dump report by using the output first video and audio streams */
2197         print_report(0, timer_start);
2198     }
2199 #if HAVE_PTHREADS
2200     free_input_threads();
2201 #endif
2202
2203     /* at the end of stream, we must flush the decoder buffers */
2204     for (i = 0; i < nb_input_streams; i++) {
2205         ist = input_streams[i];
2206         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
2207             output_packet(ist, NULL);
2208         }
2209     }
2210     poll_filters();
2211     flush_encoders();
2212
2213     term_exit();
2214
2215     /* write the trailer if needed and close file */
2216     for (i = 0; i < nb_output_files; i++) {
2217         os = output_files[i]->ctx;
2218         av_write_trailer(os);
2219     }
2220
2221     /* dump report by using the first video and audio streams */
2222     print_report(1, timer_start);
2223
2224     /* close each encoder */
2225     for (i = 0; i < nb_output_streams; i++) {
2226         ost = output_streams[i];
2227         if (ost->encoding_needed) {
2228             av_freep(&ost->st->codec->stats_in);
2229             avcodec_close(ost->st->codec);
2230         }
2231     }
2232
2233     /* close each decoder */
2234     for (i = 0; i < nb_input_streams; i++) {
2235         ist = input_streams[i];
2236         if (ist->decoding_needed) {
2237             avcodec_close(ist->st->codec);
2238         }
2239     }
2240
2241     /* finished ! */
2242     ret = 0;
2243
2244  fail:
2245     av_freep(&no_packet);
2246 #if HAVE_PTHREADS
2247     free_input_threads();
2248 #endif
2249
2250     if (output_streams) {
2251         for (i = 0; i < nb_output_streams; i++) {
2252             ost = output_streams[i];
2253             if (ost) {
2254                 if (ost->stream_copy)
2255                     av_freep(&ost->st->codec->extradata);
2256                 if (ost->logfile) {
2257                     fclose(ost->logfile);
2258                     ost->logfile = NULL;
2259                 }
2260                 av_freep(&ost->st->codec->subtitle_header);
2261                 av_free(ost->forced_kf_pts);
2262                 av_dict_free(&ost->opts);
2263             }
2264         }
2265     }
2266     return ret;
2267 }
2268
2269 static int64_t getutime(void)
2270 {
2271 #if HAVE_GETRUSAGE
2272     struct rusage rusage;
2273
2274     getrusage(RUSAGE_SELF, &rusage);
2275     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
2276 #elif HAVE_GETPROCESSTIMES
2277     HANDLE proc;
2278     FILETIME c, e, k, u;
2279     proc = GetCurrentProcess();
2280     GetProcessTimes(proc, &c, &e, &k, &u);
2281     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
2282 #else
2283     return av_gettime();
2284 #endif
2285 }
2286
2287 static int64_t getmaxrss(void)
2288 {
2289 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
2290     struct rusage rusage;
2291     getrusage(RUSAGE_SELF, &rusage);
2292     return (int64_t)rusage.ru_maxrss * 1024;
2293 #elif HAVE_GETPROCESSMEMORYINFO
2294     HANDLE proc;
2295     PROCESS_MEMORY_COUNTERS memcounters;
2296     proc = GetCurrentProcess();
2297     memcounters.cb = sizeof(memcounters);
2298     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
2299     return memcounters.PeakPagefileUsage;
2300 #else
2301     return 0;
2302 #endif
2303 }
2304
2305 static void parse_cpuflags(int argc, char **argv, const OptionDef *options)
2306 {
2307     int idx = locate_option(argc, argv, options, "cpuflags");
2308     if (idx && argv[idx + 1])
2309         opt_cpuflags("cpuflags", argv[idx + 1]);
2310 }
2311
2312 int main(int argc, char **argv)
2313 {
2314     OptionsContext o = { 0 };
2315     int64_t ti;
2316
2317     reset_options(&o);
2318
2319     av_log_set_flags(AV_LOG_SKIP_REPEATED);
2320     parse_loglevel(argc, argv, options);
2321
2322     avcodec_register_all();
2323 #if CONFIG_AVDEVICE
2324     avdevice_register_all();
2325 #endif
2326     avfilter_register_all();
2327     av_register_all();
2328     avformat_network_init();
2329
2330     show_banner();
2331
2332     parse_cpuflags(argc, argv, options);
2333
2334     /* parse options */
2335     parse_options(&o, argc, argv, options, opt_output_file);
2336
2337     if (nb_output_files <= 0 && nb_input_files == 0) {
2338         show_usage();
2339         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
2340         exit_program(1);
2341     }
2342
2343     /* file converter / grab */
2344     if (nb_output_files <= 0) {
2345         fprintf(stderr, "At least one output file must be specified\n");
2346         exit_program(1);
2347     }
2348
2349     if (nb_input_files == 0) {
2350         av_log(NULL, AV_LOG_FATAL, "At least one input file must be specified\n");
2351         exit_program(1);
2352     }
2353
2354     ti = getutime();
2355     if (transcode() < 0)
2356         exit_program(1);
2357     ti = getutime() - ti;
2358     if (do_benchmark) {
2359         int maxrss = getmaxrss() / 1024;
2360         printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
2361     }
2362
2363     exit_program(0);
2364     return 0;
2365 }