Include libavutil/channel_layout.h instead of libavutil/audioconvert.h
[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/channel_layout.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/time.h>
57 #include <sys/types.h>
58 #include <sys/resource.h>
59 #elif HAVE_GETPROCESSTIMES
60 #include <windows.h>
61 #endif
62 #if HAVE_GETPROCESSMEMORYINFO
63 #include <windows.h>
64 #include <psapi.h>
65 #endif
66
67 #if HAVE_SYS_SELECT_H
68 #include <sys/select.h>
69 #endif
70
71 #if HAVE_PTHREADS
72 #include <pthread.h>
73 #endif
74
75 #include <time.h>
76
77 #include "avconv.h"
78 #include "cmdutils.h"
79
80 #include "libavutil/avassert.h"
81
82 const char program_name[] = "avconv";
83 const int program_birth_year = 2000;
84
85 static FILE *vstats_file;
86
87 static int64_t video_size = 0;
88 static int64_t audio_size = 0;
89 static int64_t extra_size = 0;
90 static int nb_frames_dup = 0;
91 static int nb_frames_drop = 0;
92
93
94
95 #if HAVE_PTHREADS
96 /* signal to input threads that they should exit; set by the main thread */
97 static int transcoding_finished;
98 #endif
99
100 #define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
101
102 InputStream **input_streams = NULL;
103 int        nb_input_streams = 0;
104 InputFile   **input_files   = NULL;
105 int        nb_input_files   = 0;
106
107 OutputStream **output_streams = NULL;
108 int         nb_output_streams = 0;
109 OutputFile   **output_files   = NULL;
110 int         nb_output_files   = 0;
111
112 FilterGraph **filtergraphs;
113 int        nb_filtergraphs;
114
115 static void term_exit(void)
116 {
117     av_log(NULL, AV_LOG_QUIET, "");
118 }
119
120 static volatile int received_sigterm = 0;
121 static volatile int received_nb_signals = 0;
122
123 static void
124 sigterm_handler(int sig)
125 {
126     received_sigterm = sig;
127     received_nb_signals++;
128     term_exit();
129 }
130
131 static void term_init(void)
132 {
133     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
134     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
135 #ifdef SIGXCPU
136     signal(SIGXCPU, sigterm_handler);
137 #endif
138 }
139
140 static int decode_interrupt_cb(void *ctx)
141 {
142     return received_nb_signals > 1;
143 }
144
145 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
146
147 static void exit_program(void)
148 {
149     int i, j;
150
151     for (i = 0; i < nb_filtergraphs; i++) {
152         avfilter_graph_free(&filtergraphs[i]->graph);
153         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
154             av_freep(&filtergraphs[i]->inputs[j]->name);
155             av_freep(&filtergraphs[i]->inputs[j]);
156         }
157         av_freep(&filtergraphs[i]->inputs);
158         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
159             av_freep(&filtergraphs[i]->outputs[j]->name);
160             av_freep(&filtergraphs[i]->outputs[j]);
161         }
162         av_freep(&filtergraphs[i]->outputs);
163         av_freep(&filtergraphs[i]);
164     }
165     av_freep(&filtergraphs);
166
167     /* close files */
168     for (i = 0; i < nb_output_files; i++) {
169         AVFormatContext *s = output_files[i]->ctx;
170         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
171             avio_close(s->pb);
172         avformat_free_context(s);
173         av_dict_free(&output_files[i]->opts);
174         av_freep(&output_files[i]);
175     }
176     for (i = 0; i < nb_output_streams; i++) {
177         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
178         while (bsfc) {
179             AVBitStreamFilterContext *next = bsfc->next;
180             av_bitstream_filter_close(bsfc);
181             bsfc = next;
182         }
183         output_streams[i]->bitstream_filters = NULL;
184         avcodec_free_frame(&output_streams[i]->filtered_frame);
185
186         av_freep(&output_streams[i]->forced_keyframes);
187         av_freep(&output_streams[i]->avfilter);
188         av_freep(&output_streams[i]->logfile_prefix);
189         av_freep(&output_streams[i]);
190     }
191     for (i = 0; i < nb_input_files; i++) {
192         avformat_close_input(&input_files[i]->ctx);
193         av_freep(&input_files[i]);
194     }
195     for (i = 0; i < nb_input_streams; i++) {
196         avcodec_free_frame(&input_streams[i]->decoded_frame);
197         av_dict_free(&input_streams[i]->opts);
198         free_buffer_pool(&input_streams[i]->buffer_pool);
199         av_freep(&input_streams[i]->filters);
200         av_freep(&input_streams[i]);
201     }
202
203     if (vstats_file)
204         fclose(vstats_file);
205     av_free(vstats_filename);
206
207     av_freep(&input_streams);
208     av_freep(&input_files);
209     av_freep(&output_streams);
210     av_freep(&output_files);
211
212     uninit_opts();
213
214     avfilter_uninit();
215     avformat_network_deinit();
216
217     if (received_sigterm) {
218         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
219                (int) received_sigterm);
220         exit (255);
221     }
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(1);
230     }
231 }
232
233 static void abort_codec_experimental(AVCodec *c, int encoder)
234 {
235     const char *codec_string = encoder ? "encoder" : "decoder";
236     AVCodec *codec;
237     av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
238             "results.\nAdd '-strict experimental' if you want to use it.\n",
239             codec_string, c->name);
240     codec = encoder ? avcodec_find_encoder(c->id) : avcodec_find_decoder(c->id);
241     if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
242         av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
243                codec_string, codec->name);
244     exit(1);
245 }
246
247 /*
248  * Update the requested input sample format based on the output sample format.
249  * This is currently only used to request float output from decoders which
250  * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
251  * Ideally this will be removed in the future when decoders do not do format
252  * conversion and only output in their native format.
253  */
254 static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
255                               AVCodecContext *enc)
256 {
257     /* if sample formats match or a decoder sample format has already been
258        requested, just return */
259     if (enc->sample_fmt == dec->sample_fmt ||
260         dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
261         return;
262
263     /* if decoder supports more than one output format */
264     if (dec_codec && dec_codec->sample_fmts &&
265         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
266         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
267         const enum AVSampleFormat *p;
268         int min_dec = INT_MAX, min_inc = INT_MAX;
269         enum AVSampleFormat dec_fmt = AV_SAMPLE_FMT_NONE;
270         enum AVSampleFormat inc_fmt = AV_SAMPLE_FMT_NONE;
271
272         /* find a matching sample format in the encoder */
273         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
274             if (*p == enc->sample_fmt) {
275                 dec->request_sample_fmt = *p;
276                 return;
277             } else {
278                 enum AVSampleFormat dfmt = av_get_packed_sample_fmt(*p);
279                 enum AVSampleFormat efmt = av_get_packed_sample_fmt(enc->sample_fmt);
280                 int fmt_diff = 32 * abs(dfmt - efmt);
281                 if (av_sample_fmt_is_planar(*p) !=
282                     av_sample_fmt_is_planar(enc->sample_fmt))
283                     fmt_diff++;
284                 if (dfmt == efmt) {
285                     min_inc = fmt_diff;
286                     inc_fmt = *p;
287                 } else if (dfmt > efmt) {
288                     if (fmt_diff < min_inc) {
289                         min_inc = fmt_diff;
290                         inc_fmt = *p;
291                     }
292                 } else {
293                     if (fmt_diff < min_dec) {
294                         min_dec = fmt_diff;
295                         dec_fmt = *p;
296                     }
297                 }
298             }
299         }
300
301         /* if none match, provide the one that matches quality closest */
302         dec->request_sample_fmt = min_inc != INT_MAX ? inc_fmt : dec_fmt;
303     }
304 }
305
306 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
307 {
308     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
309     AVCodecContext          *avctx = ost->st->codec;
310     int ret;
311
312     /*
313      * Audio encoders may split the packets --  #frames in != #packets out.
314      * But there is no reordering, so we can limit the number of output packets
315      * by simply dropping them here.
316      * Counting encoded video frames needs to be done separately because of
317      * reordering, see do_video_out()
318      */
319     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
320         if (ost->frame_number >= ost->max_frames) {
321             av_free_packet(pkt);
322             return;
323         }
324         ost->frame_number++;
325     }
326
327     while (bsfc) {
328         AVPacket new_pkt = *pkt;
329         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
330                                            &new_pkt.data, &new_pkt.size,
331                                            pkt->data, pkt->size,
332                                            pkt->flags & AV_PKT_FLAG_KEY);
333         if (a > 0) {
334             av_free_packet(pkt);
335             new_pkt.destruct = av_destruct_packet;
336         } else if (a < 0) {
337             av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
338                    bsfc->filter->name, pkt->stream_index,
339                    avctx->codec ? avctx->codec->name : "copy");
340             print_error("", a);
341             if (exit_on_error)
342                 exit(1);
343         }
344         *pkt = new_pkt;
345
346         bsfc = bsfc->next;
347     }
348
349     pkt->stream_index = ost->index;
350     ret = av_interleaved_write_frame(s, pkt);
351     if (ret < 0) {
352         print_error("av_interleaved_write_frame()", ret);
353         exit(1);
354     }
355 }
356
357 static int check_recording_time(OutputStream *ost)
358 {
359     OutputFile *of = output_files[ost->file_index];
360
361     if (of->recording_time != INT64_MAX &&
362         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
363                       AV_TIME_BASE_Q) >= 0) {
364         ost->finished = 1;
365         return 0;
366     }
367     return 1;
368 }
369
370 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
371                          AVFrame *frame)
372 {
373     AVCodecContext *enc = ost->st->codec;
374     AVPacket pkt;
375     int got_packet = 0;
376
377     av_init_packet(&pkt);
378     pkt.data = NULL;
379     pkt.size = 0;
380
381     if (!check_recording_time(ost))
382         return;
383
384     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
385         frame->pts = ost->sync_opts;
386     ost->sync_opts = frame->pts + frame->nb_samples;
387
388     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
389         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
390         exit(1);
391     }
392
393     if (got_packet) {
394         if (pkt.pts != AV_NOPTS_VALUE)
395             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
396         if (pkt.dts != AV_NOPTS_VALUE)
397             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
398         if (pkt.duration > 0)
399             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
400
401         write_frame(s, &pkt, ost);
402
403         audio_size += pkt.size;
404     }
405 }
406
407 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
408 {
409     AVCodecContext *dec;
410     AVPicture *picture2;
411     AVPicture picture_tmp;
412     uint8_t *buf = 0;
413
414     dec = ist->st->codec;
415
416     /* deinterlace : must be done before any resize */
417     if (do_deinterlace) {
418         int size;
419
420         /* create temporary picture */
421         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
422         buf  = av_malloc(size);
423         if (!buf)
424             return;
425
426         picture2 = &picture_tmp;
427         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
428
429         if (avpicture_deinterlace(picture2, picture,
430                                  dec->pix_fmt, dec->width, dec->height) < 0) {
431             /* if error, do not deinterlace */
432             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
433             av_free(buf);
434             buf = NULL;
435             picture2 = picture;
436         }
437     } else {
438         picture2 = picture;
439     }
440
441     if (picture != picture2)
442         *picture = *picture2;
443     *bufp = buf;
444 }
445
446 static void do_subtitle_out(AVFormatContext *s,
447                             OutputStream *ost,
448                             InputStream *ist,
449                             AVSubtitle *sub,
450                             int64_t pts)
451 {
452     static uint8_t *subtitle_out = NULL;
453     int subtitle_out_max_size = 1024 * 1024;
454     int subtitle_out_size, nb, i;
455     AVCodecContext *enc;
456     AVPacket pkt;
457
458     if (pts == AV_NOPTS_VALUE) {
459         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
460         if (exit_on_error)
461             exit(1);
462         return;
463     }
464
465     enc = ost->st->codec;
466
467     if (!subtitle_out) {
468         subtitle_out = av_malloc(subtitle_out_max_size);
469     }
470
471     /* Note: DVB subtitle need one packet to draw them and one other
472        packet to clear them */
473     /* XXX: signal it in the codec context ? */
474     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
475         nb = 2;
476     else
477         nb = 1;
478
479     for (i = 0; i < nb; i++) {
480         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
481         if (!check_recording_time(ost))
482             return;
483
484         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
485         // start_display_time is required to be 0
486         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
487         sub->end_display_time  -= sub->start_display_time;
488         sub->start_display_time = 0;
489         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
490                                                     subtitle_out_max_size, sub);
491         if (subtitle_out_size < 0) {
492             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
493             exit(1);
494         }
495
496         av_init_packet(&pkt);
497         pkt.data = subtitle_out;
498         pkt.size = subtitle_out_size;
499         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
500         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
501             /* XXX: the pts correction is handled here. Maybe handling
502                it in the codec would be better */
503             if (i == 0)
504                 pkt.pts += 90 * sub->start_display_time;
505             else
506                 pkt.pts += 90 * sub->end_display_time;
507         }
508         write_frame(s, &pkt, ost);
509     }
510 }
511
512 static void do_video_out(AVFormatContext *s,
513                          OutputStream *ost,
514                          AVFrame *in_picture,
515                          int *frame_size)
516 {
517     int ret, format_video_sync;
518     AVPacket pkt;
519     AVCodecContext *enc = ost->st->codec;
520
521     *frame_size = 0;
522
523     format_video_sync = video_sync_method;
524     if (format_video_sync == VSYNC_AUTO)
525         format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
526                             (s->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
527     if (format_video_sync != VSYNC_PASSTHROUGH &&
528         ost->frame_number &&
529         in_picture->pts != AV_NOPTS_VALUE &&
530         in_picture->pts < ost->sync_opts) {
531         nb_frames_drop++;
532         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
533         return;
534     }
535
536     if (in_picture->pts == AV_NOPTS_VALUE)
537         in_picture->pts = ost->sync_opts;
538     ost->sync_opts = in_picture->pts;
539
540
541     if (!ost->frame_number)
542         ost->first_pts = in_picture->pts;
543
544     av_init_packet(&pkt);
545     pkt.data = NULL;
546     pkt.size = 0;
547
548     if (!check_recording_time(ost) ||
549         ost->frame_number >= ost->max_frames)
550         return;
551
552     if (s->oformat->flags & AVFMT_RAWPICTURE &&
553         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
554         /* raw pictures are written as AVPicture structure to
555            avoid any copies. We support temporarily the older
556            method. */
557         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
558         enc->coded_frame->top_field_first  = in_picture->top_field_first;
559         pkt.data   = (uint8_t *)in_picture;
560         pkt.size   =  sizeof(AVPicture);
561         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
562         pkt.flags |= AV_PKT_FLAG_KEY;
563
564         write_frame(s, &pkt, ost);
565     } else {
566         int got_packet;
567         AVFrame big_picture;
568
569         big_picture = *in_picture;
570         /* better than nothing: use input picture interlaced
571            settings */
572         big_picture.interlaced_frame = in_picture->interlaced_frame;
573         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
574             if (ost->top_field_first == -1)
575                 big_picture.top_field_first = in_picture->top_field_first;
576             else
577                 big_picture.top_field_first = !!ost->top_field_first;
578         }
579
580         big_picture.quality = ost->st->codec->global_quality;
581         if (!enc->me_threshold)
582             big_picture.pict_type = 0;
583         if (ost->forced_kf_index < ost->forced_kf_count &&
584             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
585             big_picture.pict_type = AV_PICTURE_TYPE_I;
586             ost->forced_kf_index++;
587         }
588         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
589         if (ret < 0) {
590             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
591             exit(1);
592         }
593
594         if (got_packet) {
595             if (pkt.pts != AV_NOPTS_VALUE)
596                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
597             if (pkt.dts != AV_NOPTS_VALUE)
598                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
599
600             write_frame(s, &pkt, ost);
601             *frame_size = pkt.size;
602             video_size += pkt.size;
603
604             /* if two pass, output log */
605             if (ost->logfile && enc->stats_out) {
606                 fprintf(ost->logfile, "%s", enc->stats_out);
607             }
608         }
609     }
610     ost->sync_opts++;
611     /*
612      * For video, number of frames in == number of packets out.
613      * But there may be reordering, so we can't throw away frames on encoder
614      * flush, we need to limit them here, before they go into encoder.
615      */
616     ost->frame_number++;
617 }
618
619 static double psnr(double d)
620 {
621     return -10.0 * log(d) / log(10.0);
622 }
623
624 static void do_video_stats(OutputStream *ost, int frame_size)
625 {
626     AVCodecContext *enc;
627     int frame_number;
628     double ti1, bitrate, avg_bitrate;
629
630     /* this is executed just the first time do_video_stats is called */
631     if (!vstats_file) {
632         vstats_file = fopen(vstats_filename, "w");
633         if (!vstats_file) {
634             perror("fopen");
635             exit(1);
636         }
637     }
638
639     enc = ost->st->codec;
640     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
641         frame_number = ost->frame_number;
642         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
643         if (enc->flags&CODEC_FLAG_PSNR)
644             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
645
646         fprintf(vstats_file,"f_size= %6d ", frame_size);
647         /* compute pts value */
648         ti1 = ost->sync_opts * av_q2d(enc->time_base);
649         if (ti1 < 0.01)
650             ti1 = 0.01;
651
652         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
653         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
654         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
655                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
656         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
657     }
658 }
659
660 /*
661  * Read one frame for lavfi output for ost and encode it.
662  */
663 static int poll_filter(OutputStream *ost)
664 {
665     OutputFile    *of = output_files[ost->file_index];
666     AVFilterBufferRef *picref;
667     AVFrame *filtered_frame = NULL;
668     int frame_size, ret;
669
670     if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
671         return AVERROR(ENOMEM);
672     } else
673         avcodec_get_frame_defaults(ost->filtered_frame);
674     filtered_frame = ost->filtered_frame;
675
676     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
677         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
678         ret = av_buffersink_read_samples(ost->filter->filter, &picref,
679                                          ost->st->codec->frame_size);
680     else
681         ret = av_buffersink_read(ost->filter->filter, &picref);
682
683     if (ret < 0)
684         return ret;
685
686     avfilter_copy_buf_props(filtered_frame, picref);
687     if (picref->pts != AV_NOPTS_VALUE) {
688         filtered_frame->pts = av_rescale_q(picref->pts,
689                                            ost->filter->filter->inputs[0]->time_base,
690                                            ost->st->codec->time_base) -
691                               av_rescale_q(of->start_time,
692                                            AV_TIME_BASE_Q,
693                                            ost->st->codec->time_base);
694
695         if (of->start_time && filtered_frame->pts < 0) {
696             avfilter_unref_buffer(picref);
697             return 0;
698         }
699     }
700
701     switch (ost->filter->filter->inputs[0]->type) {
702     case AVMEDIA_TYPE_VIDEO:
703         if (!ost->frame_aspect_ratio)
704             ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
705
706         do_video_out(of->ctx, ost, filtered_frame, &frame_size);
707         if (vstats_filename && frame_size)
708             do_video_stats(ost, frame_size);
709         break;
710     case AVMEDIA_TYPE_AUDIO:
711         do_audio_out(of->ctx, ost, filtered_frame);
712         break;
713     default:
714         // TODO support subtitle filters
715         av_assert0(0);
716     }
717
718     avfilter_unref_buffer(picref);
719
720     return 0;
721 }
722
723 /*
724  * Read as many frames from possible from lavfi and encode them.
725  *
726  * Always read from the active stream with the lowest timestamp. If no frames
727  * are available for it then return EAGAIN and wait for more input. This way we
728  * can use lavfi sources that generate unlimited amount of frames without memory
729  * usage exploding.
730  */
731 static int poll_filters(void)
732 {
733     int i, j, ret = 0;
734
735     while (ret >= 0 && !received_sigterm) {
736         OutputStream *ost = NULL;
737         int64_t min_pts = INT64_MAX;
738
739         /* choose output stream with the lowest timestamp */
740         for (i = 0; i < nb_output_streams; i++) {
741             int64_t pts = output_streams[i]->sync_opts;
742
743             if (!output_streams[i]->filter || output_streams[i]->finished)
744                 continue;
745
746             pts = av_rescale_q(pts, output_streams[i]->st->codec->time_base,
747                                AV_TIME_BASE_Q);
748             if (pts < min_pts) {
749                 min_pts = pts;
750                 ost = output_streams[i];
751             }
752         }
753
754         if (!ost)
755             break;
756
757         ret = poll_filter(ost);
758
759         if (ret == AVERROR_EOF) {
760             OutputFile *of = output_files[ost->file_index];
761
762             ost->finished = 1;
763
764             if (of->shortest) {
765                 for (j = 0; j < of->ctx->nb_streams; j++)
766                     output_streams[of->ost_index + j]->finished = 1;
767             }
768
769             ret = 0;
770         } else if (ret == AVERROR(EAGAIN))
771             return 0;
772     }
773
774     return ret;
775 }
776
777 static void print_report(int is_last_report, int64_t timer_start)
778 {
779     char buf[1024];
780     OutputStream *ost;
781     AVFormatContext *oc;
782     int64_t total_size;
783     AVCodecContext *enc;
784     int frame_number, vid, i;
785     double bitrate, ti1, pts;
786     static int64_t last_time = -1;
787     static int qp_histogram[52];
788
789     if (!print_stats && !is_last_report)
790         return;
791
792     if (!is_last_report) {
793         int64_t cur_time;
794         /* display the report every 0.5 seconds */
795         cur_time = av_gettime();
796         if (last_time == -1) {
797             last_time = cur_time;
798             return;
799         }
800         if ((cur_time - last_time) < 500000)
801             return;
802         last_time = cur_time;
803     }
804
805
806     oc = output_files[0]->ctx;
807
808     total_size = avio_size(oc->pb);
809     if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
810         total_size = avio_tell(oc->pb);
811     if (total_size < 0) {
812         char errbuf[128];
813         av_strerror(total_size, errbuf, sizeof(errbuf));
814         av_log(NULL, AV_LOG_VERBOSE, "Bitrate not available, "
815                "avio_tell() failed: %s\n", errbuf);
816         total_size = 0;
817     }
818
819     buf[0] = '\0';
820     ti1 = 1e10;
821     vid = 0;
822     for (i = 0; i < nb_output_streams; i++) {
823         float q = -1;
824         ost = output_streams[i];
825         enc = ost->st->codec;
826         if (!ost->stream_copy && enc->coded_frame)
827             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
828         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
829             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
830         }
831         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
832             float t = (av_gettime() - timer_start) / 1000000.0;
833
834             frame_number = ost->frame_number;
835             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
836                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
837             if (is_last_report)
838                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
839             if (qp_hist) {
840                 int j;
841                 int qp = lrintf(q);
842                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
843                     qp_histogram[qp]++;
844                 for (j = 0; j < 32; j++)
845                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
846             }
847             if (enc->flags&CODEC_FLAG_PSNR) {
848                 int j;
849                 double error, error_sum = 0;
850                 double scale, scale_sum = 0;
851                 char type[3] = { 'Y','U','V' };
852                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
853                 for (j = 0; j < 3; j++) {
854                     if (is_last_report) {
855                         error = enc->error[j];
856                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
857                     } else {
858                         error = enc->coded_frame->error[j];
859                         scale = enc->width * enc->height * 255.0 * 255.0;
860                     }
861                     if (j)
862                         scale /= 4;
863                     error_sum += error;
864                     scale_sum += scale;
865                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
866                 }
867                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
868             }
869             vid = 1;
870         }
871         /* compute min output value */
872         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
873         if ((pts < ti1) && (pts > 0))
874             ti1 = pts;
875     }
876     if (ti1 < 0.01)
877         ti1 = 0.01;
878
879     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
880
881     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
882             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
883             (double)total_size / 1024, ti1, bitrate);
884
885     if (nb_frames_dup || nb_frames_drop)
886         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
887                 nb_frames_dup, nb_frames_drop);
888
889     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
890
891     fflush(stderr);
892
893     if (is_last_report) {
894         int64_t raw= audio_size + video_size + extra_size;
895         av_log(NULL, AV_LOG_INFO, "\n");
896         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
897                video_size / 1024.0,
898                audio_size / 1024.0,
899                extra_size / 1024.0,
900                100.0 * (total_size - raw) / raw
901         );
902     }
903 }
904
905 static void flush_encoders(void)
906 {
907     int i, ret;
908
909     for (i = 0; i < nb_output_streams; i++) {
910         OutputStream   *ost = output_streams[i];
911         AVCodecContext *enc = ost->st->codec;
912         AVFormatContext *os = output_files[ost->file_index]->ctx;
913         int stop_encoding = 0;
914
915         if (!ost->encoding_needed)
916             continue;
917
918         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
919             continue;
920         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
921             continue;
922
923         for (;;) {
924             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
925             const char *desc;
926             int64_t *size;
927
928             switch (ost->st->codec->codec_type) {
929             case AVMEDIA_TYPE_AUDIO:
930                 encode = avcodec_encode_audio2;
931                 desc   = "Audio";
932                 size   = &audio_size;
933                 break;
934             case AVMEDIA_TYPE_VIDEO:
935                 encode = avcodec_encode_video2;
936                 desc   = "Video";
937                 size   = &video_size;
938                 break;
939             default:
940                 stop_encoding = 1;
941             }
942
943             if (encode) {
944                 AVPacket pkt;
945                 int got_packet;
946                 av_init_packet(&pkt);
947                 pkt.data = NULL;
948                 pkt.size = 0;
949
950                 ret = encode(enc, &pkt, NULL, &got_packet);
951                 if (ret < 0) {
952                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
953                     exit(1);
954                 }
955                 *size += ret;
956                 if (ost->logfile && enc->stats_out) {
957                     fprintf(ost->logfile, "%s", enc->stats_out);
958                 }
959                 if (!got_packet) {
960                     stop_encoding = 1;
961                     break;
962                 }
963                 if (pkt.pts != AV_NOPTS_VALUE)
964                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
965                 if (pkt.dts != AV_NOPTS_VALUE)
966                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
967                 if (pkt.duration > 0)
968                     pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
969                 write_frame(os, &pkt, ost);
970             }
971
972             if (stop_encoding)
973                 break;
974         }
975     }
976 }
977
978 /*
979  * Check whether a packet from ist should be written into ost at this time
980  */
981 static int check_output_constraints(InputStream *ist, OutputStream *ost)
982 {
983     OutputFile *of = output_files[ost->file_index];
984     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
985
986     if (ost->source_index != ist_index)
987         return 0;
988
989     if (of->start_time && ist->last_dts < of->start_time)
990         return 0;
991
992     return 1;
993 }
994
995 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
996 {
997     OutputFile *of = output_files[ost->file_index];
998     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
999     AVPacket opkt;
1000
1001     av_init_packet(&opkt);
1002
1003     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1004         !ost->copy_initial_nonkeyframes)
1005         return;
1006
1007     if (of->recording_time != INT64_MAX &&
1008         ist->last_dts >= of->recording_time + of->start_time) {
1009         ost->finished = 1;
1010         return;
1011     }
1012
1013     /* force the input stream PTS */
1014     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1015         audio_size += pkt->size;
1016     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1017         video_size += pkt->size;
1018         ost->sync_opts++;
1019     }
1020
1021     if (pkt->pts != AV_NOPTS_VALUE)
1022         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1023     else
1024         opkt.pts = AV_NOPTS_VALUE;
1025
1026     if (pkt->dts == AV_NOPTS_VALUE)
1027         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
1028     else
1029         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1030     opkt.dts -= ost_tb_start_time;
1031
1032     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1033     opkt.flags    = pkt->flags;
1034
1035     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1036     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1037        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1038        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1039        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1040        ) {
1041         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1042             opkt.destruct = av_destruct_packet;
1043     } else {
1044         opkt.data = pkt->data;
1045         opkt.size = pkt->size;
1046     }
1047
1048     write_frame(of->ctx, &opkt, ost);
1049     ost->st->codec->frame_number++;
1050 }
1051
1052 static void rate_emu_sleep(InputStream *ist)
1053 {
1054     if (input_files[ist->file_index]->rate_emu) {
1055         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
1056         int64_t now = av_gettime() - ist->start;
1057         if (pts > now)
1058             av_usleep(pts - now);
1059     }
1060 }
1061
1062 int guess_input_channel_layout(InputStream *ist)
1063 {
1064     AVCodecContext *dec = ist->st->codec;
1065
1066     if (!dec->channel_layout) {
1067         char layout_name[256];
1068
1069         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1070         if (!dec->channel_layout)
1071             return 0;
1072         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1073                                      dec->channels, dec->channel_layout);
1074         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1075                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1076     }
1077     return 1;
1078 }
1079
1080 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1081 {
1082     AVFrame *decoded_frame;
1083     AVCodecContext *avctx = ist->st->codec;
1084     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
1085     int i, ret, resample_changed;
1086
1087     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1088         return AVERROR(ENOMEM);
1089     decoded_frame = ist->decoded_frame;
1090
1091     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1092     if (!*got_output || ret < 0) {
1093         if (!pkt->size) {
1094             for (i = 0; i < ist->nb_filters; i++)
1095                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1096         }
1097         return ret;
1098     }
1099
1100     /* if the decoder provides a pts, use it instead of the last packet pts.
1101        the decoder could be delaying output by a packet or more. */
1102     if (decoded_frame->pts != AV_NOPTS_VALUE)
1103         ist->next_dts = decoded_frame->pts;
1104     else if (pkt->pts != AV_NOPTS_VALUE) {
1105         decoded_frame->pts = pkt->pts;
1106         pkt->pts           = AV_NOPTS_VALUE;
1107     }
1108
1109     // preprocess audio (volume)
1110     if (audio_volume != 256) {
1111         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
1112         void *samples = decoded_frame->data[0];
1113         switch (avctx->sample_fmt) {
1114         case AV_SAMPLE_FMT_U8:
1115         {
1116             uint8_t *volp = samples;
1117             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1118                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
1119                 *volp++ = av_clip_uint8(v);
1120             }
1121             break;
1122         }
1123         case AV_SAMPLE_FMT_S16:
1124         {
1125             int16_t *volp = samples;
1126             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1127                 int v = ((*volp) * audio_volume + 128) >> 8;
1128                 *volp++ = av_clip_int16(v);
1129             }
1130             break;
1131         }
1132         case AV_SAMPLE_FMT_S32:
1133         {
1134             int32_t *volp = samples;
1135             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1136                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
1137                 *volp++ = av_clipl_int32(v);
1138             }
1139             break;
1140         }
1141         case AV_SAMPLE_FMT_FLT:
1142         {
1143             float *volp = samples;
1144             float scale = audio_volume / 256.f;
1145             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1146                 *volp++ *= scale;
1147             }
1148             break;
1149         }
1150         case AV_SAMPLE_FMT_DBL:
1151         {
1152             double *volp = samples;
1153             double scale = audio_volume / 256.;
1154             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1155                 *volp++ *= scale;
1156             }
1157             break;
1158         }
1159         default:
1160             av_log(NULL, AV_LOG_FATAL,
1161                    "Audio volume adjustment on sample format %s is not supported.\n",
1162                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
1163             exit(1);
1164         }
1165     }
1166
1167     rate_emu_sleep(ist);
1168
1169     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1170                        ist->resample_channels       != avctx->channels               ||
1171                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1172                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1173     if (resample_changed) {
1174         char layout1[64], layout2[64];
1175
1176         if (!guess_input_channel_layout(ist)) {
1177             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1178                    "layout for Input Stream #%d.%d\n", ist->file_index,
1179                    ist->st->index);
1180             exit(1);
1181         }
1182         decoded_frame->channel_layout = avctx->channel_layout;
1183
1184         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1185                                      ist->resample_channel_layout);
1186         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1187                                      decoded_frame->channel_layout);
1188
1189         av_log(NULL, AV_LOG_INFO,
1190                "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",
1191                ist->file_index, ist->st->index,
1192                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1193                ist->resample_channels, layout1,
1194                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1195                avctx->channels, layout2);
1196
1197         ist->resample_sample_fmt     = decoded_frame->format;
1198         ist->resample_sample_rate    = decoded_frame->sample_rate;
1199         ist->resample_channel_layout = decoded_frame->channel_layout;
1200         ist->resample_channels       = avctx->channels;
1201
1202         for (i = 0; i < nb_filtergraphs; i++)
1203             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1204                 configure_filtergraph(filtergraphs[i]) < 0) {
1205                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1206                 exit(1);
1207             }
1208     }
1209
1210     if (decoded_frame->pts != AV_NOPTS_VALUE)
1211         decoded_frame->pts = av_rescale_q(decoded_frame->pts,
1212                                           ist->st->time_base,
1213                                           (AVRational){1, ist->st->codec->sample_rate});
1214     for (i = 0; i < ist->nb_filters; i++)
1215         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1216
1217     return ret;
1218 }
1219
1220 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1221 {
1222     AVFrame *decoded_frame;
1223     void *buffer_to_free = NULL;
1224     int i, ret = 0, resample_changed;
1225
1226     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1227         return AVERROR(ENOMEM);
1228     decoded_frame = ist->decoded_frame;
1229
1230     ret = avcodec_decode_video2(ist->st->codec,
1231                                 decoded_frame, got_output, pkt);
1232     if (!*got_output || ret < 0) {
1233         if (!pkt->size) {
1234             for (i = 0; i < ist->nb_filters; i++)
1235                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1236         }
1237         return ret;
1238     }
1239
1240     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
1241                                            decoded_frame->pkt_dts);
1242     pkt->size = 0;
1243     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
1244
1245     rate_emu_sleep(ist);
1246
1247     if (ist->st->sample_aspect_ratio.num)
1248         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1249
1250     resample_changed = ist->resample_width   != decoded_frame->width  ||
1251                        ist->resample_height  != decoded_frame->height ||
1252                        ist->resample_pix_fmt != decoded_frame->format;
1253     if (resample_changed) {
1254         av_log(NULL, AV_LOG_INFO,
1255                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1256                ist->file_index, ist->st->index,
1257                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1258                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1259
1260         ret = poll_filters();
1261         if (ret < 0 && (ret != AVERROR_EOF && ret != AVERROR(EAGAIN)))
1262             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
1263
1264         ist->resample_width   = decoded_frame->width;
1265         ist->resample_height  = decoded_frame->height;
1266         ist->resample_pix_fmt = decoded_frame->format;
1267
1268         for (i = 0; i < nb_filtergraphs; i++)
1269             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1270                 configure_filtergraph(filtergraphs[i]) < 0) {
1271                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1272                 exit(1);
1273             }
1274     }
1275
1276     for (i = 0; i < ist->nb_filters; i++) {
1277         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
1278             FrameBuffer      *buf = decoded_frame->opaque;
1279             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
1280                                         decoded_frame->data, decoded_frame->linesize,
1281                                         AV_PERM_READ | AV_PERM_PRESERVE,
1282                                         ist->st->codec->width, ist->st->codec->height,
1283                                         ist->st->codec->pix_fmt);
1284
1285             avfilter_copy_frame_props(fb, decoded_frame);
1286             fb->buf->priv           = buf;
1287             fb->buf->free           = filter_release_buffer;
1288
1289             buf->refcount++;
1290             av_buffersrc_buffer(ist->filters[i]->filter, fb);
1291         } else
1292             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1293     }
1294
1295     av_free(buffer_to_free);
1296     return ret;
1297 }
1298
1299 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1300 {
1301     AVSubtitle subtitle;
1302     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1303                                           &subtitle, got_output, pkt);
1304     if (ret < 0)
1305         return ret;
1306     if (!*got_output)
1307         return ret;
1308
1309     rate_emu_sleep(ist);
1310
1311     for (i = 0; i < nb_output_streams; i++) {
1312         OutputStream *ost = output_streams[i];
1313
1314         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1315             continue;
1316
1317         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
1318     }
1319
1320     avsubtitle_free(&subtitle);
1321     return ret;
1322 }
1323
1324 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1325 static int output_packet(InputStream *ist, const AVPacket *pkt)
1326 {
1327     int i;
1328     int got_output;
1329     AVPacket avpkt;
1330
1331     if (ist->next_dts == AV_NOPTS_VALUE)
1332         ist->next_dts = ist->last_dts;
1333
1334     if (pkt == NULL) {
1335         /* EOF handling */
1336         av_init_packet(&avpkt);
1337         avpkt.data = NULL;
1338         avpkt.size = 0;
1339         goto handle_eof;
1340     } else {
1341         avpkt = *pkt;
1342     }
1343
1344     if (pkt->dts != AV_NOPTS_VALUE)
1345         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1346
1347     // while we have more to decode or while the decoder did output something on EOF
1348     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1349         int ret = 0;
1350     handle_eof:
1351
1352         ist->last_dts = ist->next_dts;
1353
1354         if (avpkt.size && avpkt.size != pkt->size) {
1355             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1356                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1357             ist->showed_multi_packet_warning = 1;
1358         }
1359
1360         switch (ist->st->codec->codec_type) {
1361         case AVMEDIA_TYPE_AUDIO:
1362             ret = decode_audio    (ist, &avpkt, &got_output);
1363             break;
1364         case AVMEDIA_TYPE_VIDEO:
1365             ret = decode_video    (ist, &avpkt, &got_output);
1366             if (avpkt.duration)
1367                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1368             else if (ist->st->avg_frame_rate.num)
1369                 ist->next_dts += av_rescale_q(1, av_inv_q(ist->st->avg_frame_rate),
1370                                               AV_TIME_BASE_Q);
1371             else if (ist->st->codec->time_base.num != 0) {
1372                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
1373                                                    ist->st->codec->ticks_per_frame;
1374                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
1375             }
1376             break;
1377         case AVMEDIA_TYPE_SUBTITLE:
1378             ret = transcode_subtitles(ist, &avpkt, &got_output);
1379             break;
1380         default:
1381             return -1;
1382         }
1383
1384         if (ret < 0)
1385             return ret;
1386         // touch data and size only if not EOF
1387         if (pkt) {
1388             avpkt.data += ret;
1389             avpkt.size -= ret;
1390         }
1391         if (!got_output) {
1392             continue;
1393         }
1394     }
1395
1396     /* handle stream copy */
1397     if (!ist->decoding_needed) {
1398         rate_emu_sleep(ist);
1399         ist->last_dts = ist->next_dts;
1400         switch (ist->st->codec->codec_type) {
1401         case AVMEDIA_TYPE_AUDIO:
1402             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1403                              ist->st->codec->sample_rate;
1404             break;
1405         case AVMEDIA_TYPE_VIDEO:
1406             if (ist->st->codec->time_base.num != 0) {
1407                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
1408                 ist->next_dts += ((int64_t)AV_TIME_BASE *
1409                                   ist->st->codec->time_base.num * ticks) /
1410                                   ist->st->codec->time_base.den;
1411             }
1412             break;
1413         }
1414     }
1415     for (i = 0; pkt && i < nb_output_streams; i++) {
1416         OutputStream *ost = output_streams[i];
1417
1418         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1419             continue;
1420
1421         do_streamcopy(ist, ost, pkt);
1422     }
1423
1424     return 0;
1425 }
1426
1427 static void print_sdp(void)
1428 {
1429     char sdp[2048];
1430     int i;
1431     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
1432
1433     if (!avc)
1434         exit(1);
1435     for (i = 0; i < nb_output_files; i++)
1436         avc[i] = output_files[i]->ctx;
1437
1438     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
1439     printf("SDP:\n%s\n", sdp);
1440     fflush(stdout);
1441     av_freep(&avc);
1442 }
1443
1444 static int init_input_stream(int ist_index, char *error, int error_len)
1445 {
1446     int i, ret;
1447     InputStream *ist = input_streams[ist_index];
1448     if (ist->decoding_needed) {
1449         AVCodec *codec = ist->dec;
1450         if (!codec) {
1451             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
1452                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
1453             return AVERROR(EINVAL);
1454         }
1455
1456         /* update requested sample format for the decoder based on the
1457            corresponding encoder sample format */
1458         for (i = 0; i < nb_output_streams; i++) {
1459             OutputStream *ost = output_streams[i];
1460             if (ost->source_index == ist_index) {
1461                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
1462                 break;
1463             }
1464         }
1465
1466         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
1467             ist->st->codec->get_buffer     = codec_get_buffer;
1468             ist->st->codec->release_buffer = codec_release_buffer;
1469             ist->st->codec->opaque         = &ist->buffer_pool;
1470         }
1471
1472         if (!av_dict_get(ist->opts, "threads", NULL, 0))
1473             av_dict_set(&ist->opts, "threads", "auto", 0);
1474         if ((ret = avcodec_open2(ist->st->codec, codec, &ist->opts)) < 0) {
1475             if (ret == AVERROR_EXPERIMENTAL)
1476                 abort_codec_experimental(codec, 0);
1477             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
1478                     ist->file_index, ist->st->index);
1479             return ret;
1480         }
1481         assert_avoptions(ist->opts);
1482     }
1483
1484     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;
1485     ist->next_dts = AV_NOPTS_VALUE;
1486     init_pts_correction(&ist->pts_ctx);
1487     ist->is_start = 1;
1488
1489     return 0;
1490 }
1491
1492 static InputStream *get_input_stream(OutputStream *ost)
1493 {
1494     if (ost->source_index >= 0)
1495         return input_streams[ost->source_index];
1496
1497     if (ost->filter) {
1498         FilterGraph *fg = ost->filter->graph;
1499         int i;
1500
1501         for (i = 0; i < fg->nb_inputs; i++)
1502             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
1503                 return fg->inputs[i]->ist;
1504     }
1505
1506     return NULL;
1507 }
1508
1509 static void parse_forced_key_frames(char *kf, OutputStream *ost,
1510                                     AVCodecContext *avctx)
1511 {
1512     char *p;
1513     int n = 1, i;
1514     int64_t t;
1515
1516     for (p = kf; *p; p++)
1517         if (*p == ',')
1518             n++;
1519     ost->forced_kf_count = n;
1520     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
1521     if (!ost->forced_kf_pts) {
1522         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
1523         exit(1);
1524     }
1525
1526     p = kf;
1527     for (i = 0; i < n; i++) {
1528         char *next = strchr(p, ',');
1529
1530         if (next)
1531             *next++ = 0;
1532
1533         t = parse_time_or_die("force_key_frames", p, 1);
1534         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
1535
1536         p = next;
1537     }
1538 }
1539
1540 static int transcode_init(void)
1541 {
1542     int ret = 0, i, j, k;
1543     AVFormatContext *oc;
1544     AVCodecContext *codec;
1545     OutputStream *ost;
1546     InputStream *ist;
1547     char error[1024];
1548     int want_sdp = 1;
1549
1550     /* init framerate emulation */
1551     for (i = 0; i < nb_input_files; i++) {
1552         InputFile *ifile = input_files[i];
1553         if (ifile->rate_emu)
1554             for (j = 0; j < ifile->nb_streams; j++)
1555                 input_streams[j + ifile->ist_index]->start = av_gettime();
1556     }
1557
1558     /* output stream init */
1559     for (i = 0; i < nb_output_files; i++) {
1560         oc = output_files[i]->ctx;
1561         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
1562             av_dump_format(oc, i, oc->filename, 1);
1563             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
1564             return AVERROR(EINVAL);
1565         }
1566     }
1567
1568     /* init complex filtergraphs */
1569     for (i = 0; i < nb_filtergraphs; i++)
1570         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
1571             return ret;
1572
1573     /* for each output stream, we compute the right encoding parameters */
1574     for (i = 0; i < nb_output_streams; i++) {
1575         AVCodecContext *icodec = NULL;
1576         ost = output_streams[i];
1577         oc  = output_files[ost->file_index]->ctx;
1578         ist = get_input_stream(ost);
1579
1580         if (ost->attachment_filename)
1581             continue;
1582
1583         codec  = ost->st->codec;
1584
1585         if (ist) {
1586             icodec = ist->st->codec;
1587
1588             ost->st->disposition          = ist->st->disposition;
1589             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
1590             codec->chroma_sample_location = icodec->chroma_sample_location;
1591         }
1592
1593         if (ost->stream_copy) {
1594             uint64_t extra_size;
1595
1596             av_assert0(ist && !ost->filter);
1597
1598             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
1599
1600             if (extra_size > INT_MAX) {
1601                 return AVERROR(EINVAL);
1602             }
1603
1604             /* if stream_copy is selected, no need to decode or encode */
1605             codec->codec_id   = icodec->codec_id;
1606             codec->codec_type = icodec->codec_type;
1607
1608             if (!codec->codec_tag) {
1609                 if (!oc->oformat->codec_tag ||
1610                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
1611                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
1612                     codec->codec_tag = icodec->codec_tag;
1613             }
1614
1615             codec->bit_rate       = icodec->bit_rate;
1616             codec->rc_max_rate    = icodec->rc_max_rate;
1617             codec->rc_buffer_size = icodec->rc_buffer_size;
1618             codec->field_order    = icodec->field_order;
1619             codec->extradata      = av_mallocz(extra_size);
1620             if (!codec->extradata) {
1621                 return AVERROR(ENOMEM);
1622             }
1623             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
1624             codec->extradata_size = icodec->extradata_size;
1625             if (!copy_tb) {
1626                 codec->time_base      = icodec->time_base;
1627                 codec->time_base.num *= icodec->ticks_per_frame;
1628                 av_reduce(&codec->time_base.num, &codec->time_base.den,
1629                           codec->time_base.num, codec->time_base.den, INT_MAX);
1630             } else
1631                 codec->time_base = ist->st->time_base;
1632
1633             switch (codec->codec_type) {
1634             case AVMEDIA_TYPE_AUDIO:
1635                 if (audio_volume != 256) {
1636                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
1637                     exit(1);
1638                 }
1639                 codec->channel_layout     = icodec->channel_layout;
1640                 codec->sample_rate        = icodec->sample_rate;
1641                 codec->channels           = icodec->channels;
1642                 codec->frame_size         = icodec->frame_size;
1643                 codec->audio_service_type = icodec->audio_service_type;
1644                 codec->block_align        = icodec->block_align;
1645                 break;
1646             case AVMEDIA_TYPE_VIDEO:
1647                 codec->pix_fmt            = icodec->pix_fmt;
1648                 codec->width              = icodec->width;
1649                 codec->height             = icodec->height;
1650                 codec->has_b_frames       = icodec->has_b_frames;
1651                 if (!codec->sample_aspect_ratio.num) {
1652                     codec->sample_aspect_ratio   =
1653                     ost->st->sample_aspect_ratio =
1654                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
1655                         ist->st->codec->sample_aspect_ratio.num ?
1656                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
1657                 }
1658                 break;
1659             case AVMEDIA_TYPE_SUBTITLE:
1660                 codec->width  = icodec->width;
1661                 codec->height = icodec->height;
1662                 break;
1663             case AVMEDIA_TYPE_DATA:
1664             case AVMEDIA_TYPE_ATTACHMENT:
1665                 break;
1666             default:
1667                 abort();
1668             }
1669         } else {
1670             if (!ost->enc) {
1671                 /* should only happen when a default codec is not present. */
1672                 snprintf(error, sizeof(error), "Automatic encoder selection "
1673                          "failed for output stream #%d:%d. Default encoder for "
1674                          "format %s is probably disabled. Please choose an "
1675                          "encoder manually.\n", ost->file_index, ost->index,
1676                          oc->oformat->name);
1677                 ret = AVERROR(EINVAL);
1678                 goto dump_format;
1679             }
1680
1681             if (ist)
1682                 ist->decoding_needed = 1;
1683             ost->encoding_needed = 1;
1684
1685             /*
1686              * We want CFR output if and only if one of those is true:
1687              * 1) user specified output framerate with -r
1688              * 2) user specified -vsync cfr
1689              * 3) output format is CFR and the user didn't force vsync to
1690              *    something else than CFR
1691              *
1692              * in such a case, set ost->frame_rate
1693              */
1694             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1695                 !ost->frame_rate.num && ist &&
1696                 (video_sync_method ==  VSYNC_CFR ||
1697                  (video_sync_method ==  VSYNC_AUTO &&
1698                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
1699                 ost->frame_rate = ist->framerate.num ? ist->framerate :
1700                                   ist->st->avg_frame_rate.num ?
1701                                   ist->st->avg_frame_rate :
1702                                   (AVRational){25, 1};
1703
1704                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
1705                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
1706                     ost->frame_rate = ost->enc->supported_framerates[idx];
1707                 }
1708             }
1709
1710             if (!ost->filter &&
1711                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
1712                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
1713                     FilterGraph *fg;
1714                     fg = init_simple_filtergraph(ist, ost);
1715                     if (configure_filtergraph(fg)) {
1716                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
1717                         exit(1);
1718                     }
1719             }
1720
1721             switch (codec->codec_type) {
1722             case AVMEDIA_TYPE_AUDIO:
1723                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
1724                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
1725                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
1726                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
1727                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
1728                 break;
1729             case AVMEDIA_TYPE_VIDEO:
1730                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
1731
1732                 codec->width  = ost->filter->filter->inputs[0]->w;
1733                 codec->height = ost->filter->filter->inputs[0]->h;
1734                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
1735                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
1736                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
1737                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
1738                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
1739
1740                 if (icodec &&
1741                     (codec->width   != icodec->width  ||
1742                      codec->height  != icodec->height ||
1743                      codec->pix_fmt != icodec->pix_fmt)) {
1744                     codec->bits_per_raw_sample = 0;
1745                 }
1746
1747                 if (ost->forced_keyframes)
1748                     parse_forced_key_frames(ost->forced_keyframes, ost,
1749                                             ost->st->codec);
1750                 break;
1751             case AVMEDIA_TYPE_SUBTITLE:
1752                 codec->time_base = (AVRational){1, 1000};
1753                 break;
1754             default:
1755                 abort();
1756                 break;
1757             }
1758             /* two pass mode */
1759             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
1760                 char logfilename[1024];
1761                 FILE *f;
1762
1763                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
1764                          ost->logfile_prefix ? ost->logfile_prefix :
1765                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
1766                          i);
1767                 if (!strcmp(ost->enc->name, "libx264")) {
1768                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
1769                 } else {
1770                     if (codec->flags & CODEC_FLAG_PASS1) {
1771                         f = fopen(logfilename, "wb");
1772                         if (!f) {
1773                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
1774                                    logfilename, strerror(errno));
1775                             exit(1);
1776                         }
1777                         ost->logfile = f;
1778                     } else {
1779                         char  *logbuffer;
1780                         size_t logbuffer_size;
1781                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
1782                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
1783                                    logfilename);
1784                             exit(1);
1785                         }
1786                         codec->stats_in = logbuffer;
1787                     }
1788                 }
1789             }
1790         }
1791     }
1792
1793     /* open each encoder */
1794     for (i = 0; i < nb_output_streams; i++) {
1795         ost = output_streams[i];
1796         if (ost->encoding_needed) {
1797             AVCodec      *codec = ost->enc;
1798             AVCodecContext *dec = NULL;
1799
1800             if ((ist = get_input_stream(ost)))
1801                 dec = ist->st->codec;
1802             if (dec && dec->subtitle_header) {
1803                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
1804                 if (!ost->st->codec->subtitle_header) {
1805                     ret = AVERROR(ENOMEM);
1806                     goto dump_format;
1807                 }
1808                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
1809                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
1810             }
1811             if (!av_dict_get(ost->opts, "threads", NULL, 0))
1812                 av_dict_set(&ost->opts, "threads", "auto", 0);
1813             if ((ret = avcodec_open2(ost->st->codec, codec, &ost->opts)) < 0) {
1814                 if (ret == AVERROR_EXPERIMENTAL)
1815                     abort_codec_experimental(codec, 1);
1816                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
1817                         ost->file_index, ost->index);
1818                 goto dump_format;
1819             }
1820             assert_avoptions(ost->opts);
1821             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
1822                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
1823                                              "It takes bits/s as argument, not kbits/s\n");
1824             extra_size += ost->st->codec->extradata_size;
1825
1826             if (ost->st->codec->me_threshold)
1827                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
1828         }
1829     }
1830
1831     /* init input streams */
1832     for (i = 0; i < nb_input_streams; i++)
1833         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
1834             goto dump_format;
1835
1836     /* discard unused programs */
1837     for (i = 0; i < nb_input_files; i++) {
1838         InputFile *ifile = input_files[i];
1839         for (j = 0; j < ifile->ctx->nb_programs; j++) {
1840             AVProgram *p = ifile->ctx->programs[j];
1841             int discard  = AVDISCARD_ALL;
1842
1843             for (k = 0; k < p->nb_stream_indexes; k++)
1844                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
1845                     discard = AVDISCARD_DEFAULT;
1846                     break;
1847                 }
1848             p->discard = discard;
1849         }
1850     }
1851
1852     /* open files and write file headers */
1853     for (i = 0; i < nb_output_files; i++) {
1854         oc = output_files[i]->ctx;
1855         oc->interrupt_callback = int_cb;
1856         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
1857             char errbuf[128];
1858             const char *errbuf_ptr = errbuf;
1859             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
1860                 errbuf_ptr = strerror(AVUNERROR(ret));
1861             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
1862             ret = AVERROR(EINVAL);
1863             goto dump_format;
1864         }
1865         assert_avoptions(output_files[i]->opts);
1866         if (strcmp(oc->oformat->name, "rtp")) {
1867             want_sdp = 0;
1868         }
1869     }
1870
1871  dump_format:
1872     /* dump the file output parameters - cannot be done before in case
1873        of stream copy */
1874     for (i = 0; i < nb_output_files; i++) {
1875         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
1876     }
1877
1878     /* dump the stream mapping */
1879     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
1880     for (i = 0; i < nb_input_streams; i++) {
1881         ist = input_streams[i];
1882
1883         for (j = 0; j < ist->nb_filters; j++) {
1884             if (ist->filters[j]->graph->graph_desc) {
1885                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
1886                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
1887                        ist->filters[j]->name);
1888                 if (nb_filtergraphs > 1)
1889                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
1890                 av_log(NULL, AV_LOG_INFO, "\n");
1891             }
1892         }
1893     }
1894
1895     for (i = 0; i < nb_output_streams; i++) {
1896         ost = output_streams[i];
1897
1898         if (ost->attachment_filename) {
1899             /* an attached file */
1900             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
1901                    ost->attachment_filename, ost->file_index, ost->index);
1902             continue;
1903         }
1904
1905         if (ost->filter && ost->filter->graph->graph_desc) {
1906             /* output from a complex graph */
1907             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
1908             if (nb_filtergraphs > 1)
1909                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
1910
1911             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
1912                    ost->index, ost->enc ? ost->enc->name : "?");
1913             continue;
1914         }
1915
1916         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
1917                input_streams[ost->source_index]->file_index,
1918                input_streams[ost->source_index]->st->index,
1919                ost->file_index,
1920                ost->index);
1921         if (ost->sync_ist != input_streams[ost->source_index])
1922             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
1923                    ost->sync_ist->file_index,
1924                    ost->sync_ist->st->index);
1925         if (ost->stream_copy)
1926             av_log(NULL, AV_LOG_INFO, " (copy)");
1927         else
1928             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
1929                    input_streams[ost->source_index]->dec->name : "?",
1930                    ost->enc ? ost->enc->name : "?");
1931         av_log(NULL, AV_LOG_INFO, "\n");
1932     }
1933
1934     if (ret) {
1935         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
1936         return ret;
1937     }
1938
1939     if (want_sdp) {
1940         print_sdp();
1941     }
1942
1943     return 0;
1944 }
1945
1946 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
1947 static int need_output(void)
1948 {
1949     int i;
1950
1951     for (i = 0; i < nb_output_streams; i++) {
1952         OutputStream *ost    = output_streams[i];
1953         OutputFile *of       = output_files[ost->file_index];
1954         AVFormatContext *os  = output_files[ost->file_index]->ctx;
1955
1956         if (ost->finished ||
1957             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
1958             continue;
1959         if (ost->frame_number >= ost->max_frames) {
1960             int j;
1961             for (j = 0; j < of->ctx->nb_streams; j++)
1962                 output_streams[of->ost_index + j]->finished = 1;
1963             continue;
1964         }
1965
1966         return 1;
1967     }
1968
1969     return 0;
1970 }
1971
1972 static InputFile *select_input_file(void)
1973 {
1974     InputFile *ifile = NULL;
1975     int64_t ipts_min = INT64_MAX;
1976     int i;
1977
1978     for (i = 0; i < nb_input_streams; i++) {
1979         InputStream *ist = input_streams[i];
1980         int64_t ipts     = ist->last_dts;
1981
1982         if (ist->discard || input_files[ist->file_index]->eagain)
1983             continue;
1984         if (!input_files[ist->file_index]->eof_reached) {
1985             if (ipts < ipts_min) {
1986                 ipts_min = ipts;
1987                 ifile    = input_files[ist->file_index];
1988             }
1989         }
1990     }
1991
1992     return ifile;
1993 }
1994
1995 #if HAVE_PTHREADS
1996 static void *input_thread(void *arg)
1997 {
1998     InputFile *f = arg;
1999     int ret = 0;
2000
2001     while (!transcoding_finished && ret >= 0) {
2002         AVPacket pkt;
2003         ret = av_read_frame(f->ctx, &pkt);
2004
2005         if (ret == AVERROR(EAGAIN)) {
2006             av_usleep(10000);
2007             ret = 0;
2008             continue;
2009         } else if (ret < 0)
2010             break;
2011
2012         pthread_mutex_lock(&f->fifo_lock);
2013         while (!av_fifo_space(f->fifo))
2014             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2015
2016         av_dup_packet(&pkt);
2017         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2018
2019         pthread_mutex_unlock(&f->fifo_lock);
2020     }
2021
2022     f->finished = 1;
2023     return NULL;
2024 }
2025
2026 static void free_input_threads(void)
2027 {
2028     int i;
2029
2030     if (nb_input_files == 1)
2031         return;
2032
2033     transcoding_finished = 1;
2034
2035     for (i = 0; i < nb_input_files; i++) {
2036         InputFile *f = input_files[i];
2037         AVPacket pkt;
2038
2039         if (!f->fifo || f->joined)
2040             continue;
2041
2042         pthread_mutex_lock(&f->fifo_lock);
2043         while (av_fifo_size(f->fifo)) {
2044             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2045             av_free_packet(&pkt);
2046         }
2047         pthread_cond_signal(&f->fifo_cond);
2048         pthread_mutex_unlock(&f->fifo_lock);
2049
2050         pthread_join(f->thread, NULL);
2051         f->joined = 1;
2052
2053         while (av_fifo_size(f->fifo)) {
2054             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2055             av_free_packet(&pkt);
2056         }
2057         av_fifo_free(f->fifo);
2058     }
2059 }
2060
2061 static int init_input_threads(void)
2062 {
2063     int i, ret;
2064
2065     if (nb_input_files == 1)
2066         return 0;
2067
2068     for (i = 0; i < nb_input_files; i++) {
2069         InputFile *f = input_files[i];
2070
2071         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2072             return AVERROR(ENOMEM);
2073
2074         pthread_mutex_init(&f->fifo_lock, NULL);
2075         pthread_cond_init (&f->fifo_cond, NULL);
2076
2077         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2078             return AVERROR(ret);
2079     }
2080     return 0;
2081 }
2082
2083 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2084 {
2085     int ret = 0;
2086
2087     pthread_mutex_lock(&f->fifo_lock);
2088
2089     if (av_fifo_size(f->fifo)) {
2090         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2091         pthread_cond_signal(&f->fifo_cond);
2092     } else {
2093         if (f->finished)
2094             ret = AVERROR_EOF;
2095         else
2096             ret = AVERROR(EAGAIN);
2097     }
2098
2099     pthread_mutex_unlock(&f->fifo_lock);
2100
2101     return ret;
2102 }
2103 #endif
2104
2105 static int get_input_packet(InputFile *f, AVPacket *pkt)
2106 {
2107 #if HAVE_PTHREADS
2108     if (nb_input_files > 1)
2109         return get_input_packet_mt(f, pkt);
2110 #endif
2111     return av_read_frame(f->ctx, pkt);
2112 }
2113
2114 static int got_eagain(void)
2115 {
2116     int i;
2117     for (i = 0; i < nb_input_files; i++)
2118         if (input_files[i]->eagain)
2119             return 1;
2120     return 0;
2121 }
2122
2123 static void reset_eagain(void)
2124 {
2125     int i;
2126     for (i = 0; i < nb_input_files; i++)
2127         input_files[i]->eagain = 0;
2128 }
2129
2130 /*
2131  * Read one packet from an input file and send it for
2132  * - decoding -> lavfi (audio/video)
2133  * - decoding -> encoding -> muxing (subtitles)
2134  * - muxing (streamcopy)
2135  *
2136  * Return
2137  * - 0 -- one packet was read and processed
2138  * - AVERROR(EAGAIN) -- no packets were available for selected file,
2139  *   this function should be called again
2140  * - AVERROR_EOF -- this function should not be called again
2141  */
2142 static int process_input(void)
2143 {
2144     InputFile *ifile;
2145     AVFormatContext *is;
2146     InputStream *ist;
2147     AVPacket pkt;
2148     int ret, i, j;
2149
2150     /* select the stream that we must read now */
2151     ifile = select_input_file();
2152     /* if none, if is finished */
2153     if (!ifile) {
2154         if (got_eagain()) {
2155             reset_eagain();
2156             av_usleep(10000);
2157             return AVERROR(EAGAIN);
2158         }
2159         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from.\n");
2160         return AVERROR_EOF;
2161     }
2162
2163     is  = ifile->ctx;
2164     ret = get_input_packet(ifile, &pkt);
2165
2166     if (ret == AVERROR(EAGAIN)) {
2167         ifile->eagain = 1;
2168         return ret;
2169     }
2170     if (ret < 0) {
2171         if (ret != AVERROR_EOF) {
2172             print_error(is->filename, ret);
2173             if (exit_on_error)
2174                 exit(1);
2175         }
2176         ifile->eof_reached = 1;
2177
2178         for (i = 0; i < ifile->nb_streams; i++) {
2179             ist = input_streams[ifile->ist_index + i];
2180             if (ist->decoding_needed)
2181                 output_packet(ist, NULL);
2182
2183             /* mark all outputs that don't go through lavfi as finished */
2184             for (j = 0; j < nb_output_streams; j++) {
2185                 OutputStream *ost = output_streams[j];
2186
2187                 if (ost->source_index == ifile->ist_index + i &&
2188                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
2189                     ost->finished= 1;
2190             }
2191         }
2192
2193         return AVERROR(EAGAIN);
2194     }
2195
2196     reset_eagain();
2197
2198     if (do_pkt_dump) {
2199         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2200                          is->streams[pkt.stream_index]);
2201     }
2202     /* the following test is needed in case new streams appear
2203        dynamically in stream : we ignore them */
2204     if (pkt.stream_index >= ifile->nb_streams)
2205         goto discard_packet;
2206
2207     ist = input_streams[ifile->ist_index + pkt.stream_index];
2208     if (ist->discard)
2209         goto discard_packet;
2210
2211     if (pkt.dts != AV_NOPTS_VALUE)
2212         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2213     if (pkt.pts != AV_NOPTS_VALUE)
2214         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2215
2216     if (pkt.pts != AV_NOPTS_VALUE)
2217         pkt.pts *= ist->ts_scale;
2218     if (pkt.dts != AV_NOPTS_VALUE)
2219         pkt.dts *= ist->ts_scale;
2220
2221     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
2222         (is->iformat->flags & AVFMT_TS_DISCONT)) {
2223         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2224         int64_t delta   = pkt_dts - ist->next_dts;
2225
2226         if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
2227             ifile->ts_offset -= delta;
2228             av_log(NULL, AV_LOG_DEBUG,
2229                    "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2230                    delta, ifile->ts_offset);
2231             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2232             if (pkt.pts != AV_NOPTS_VALUE)
2233                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2234         }
2235     }
2236
2237     ret = output_packet(ist, &pkt);
2238     if (ret < 0) {
2239         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
2240                ist->file_index, ist->st->index);
2241         if (exit_on_error)
2242             exit(1);
2243     }
2244
2245 discard_packet:
2246     av_free_packet(&pkt);
2247
2248     return 0;
2249 }
2250
2251 /*
2252  * The following code is the main loop of the file converter
2253  */
2254 static int transcode(void)
2255 {
2256     int ret, i, need_input = 1;
2257     AVFormatContext *os;
2258     OutputStream *ost;
2259     InputStream *ist;
2260     int64_t timer_start;
2261
2262     ret = transcode_init();
2263     if (ret < 0)
2264         goto fail;
2265
2266     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2267     term_init();
2268
2269     timer_start = av_gettime();
2270
2271 #if HAVE_PTHREADS
2272     if ((ret = init_input_threads()) < 0)
2273         goto fail;
2274 #endif
2275
2276     while (!received_sigterm) {
2277         /* check if there's any stream where output is still needed */
2278         if (!need_output()) {
2279             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2280             break;
2281         }
2282
2283         /* read and process one input packet if needed */
2284         if (need_input) {
2285             ret = process_input();
2286             if (ret == AVERROR_EOF)
2287                 need_input = 0;
2288         }
2289
2290         ret = poll_filters();
2291         if (ret < 0) {
2292             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
2293                 continue;
2294
2295             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
2296             break;
2297         }
2298
2299         /* dump report by using the output first video and audio streams */
2300         print_report(0, timer_start);
2301     }
2302 #if HAVE_PTHREADS
2303     free_input_threads();
2304 #endif
2305
2306     /* at the end of stream, we must flush the decoder buffers */
2307     for (i = 0; i < nb_input_streams; i++) {
2308         ist = input_streams[i];
2309         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
2310             output_packet(ist, NULL);
2311         }
2312     }
2313     poll_filters();
2314     flush_encoders();
2315
2316     term_exit();
2317
2318     /* write the trailer if needed and close file */
2319     for (i = 0; i < nb_output_files; i++) {
2320         os = output_files[i]->ctx;
2321         av_write_trailer(os);
2322     }
2323
2324     /* dump report by using the first video and audio streams */
2325     print_report(1, timer_start);
2326
2327     /* close each encoder */
2328     for (i = 0; i < nb_output_streams; i++) {
2329         ost = output_streams[i];
2330         if (ost->encoding_needed) {
2331             av_freep(&ost->st->codec->stats_in);
2332             avcodec_close(ost->st->codec);
2333         }
2334     }
2335
2336     /* close each decoder */
2337     for (i = 0; i < nb_input_streams; i++) {
2338         ist = input_streams[i];
2339         if (ist->decoding_needed) {
2340             avcodec_close(ist->st->codec);
2341         }
2342     }
2343
2344     /* finished ! */
2345     ret = 0;
2346
2347  fail:
2348 #if HAVE_PTHREADS
2349     free_input_threads();
2350 #endif
2351
2352     if (output_streams) {
2353         for (i = 0; i < nb_output_streams; i++) {
2354             ost = output_streams[i];
2355             if (ost) {
2356                 if (ost->stream_copy)
2357                     av_freep(&ost->st->codec->extradata);
2358                 if (ost->logfile) {
2359                     fclose(ost->logfile);
2360                     ost->logfile = NULL;
2361                 }
2362                 av_freep(&ost->st->codec->subtitle_header);
2363                 av_free(ost->forced_kf_pts);
2364                 av_dict_free(&ost->opts);
2365             }
2366         }
2367     }
2368     return ret;
2369 }
2370
2371 static int64_t getutime(void)
2372 {
2373 #if HAVE_GETRUSAGE
2374     struct rusage rusage;
2375
2376     getrusage(RUSAGE_SELF, &rusage);
2377     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
2378 #elif HAVE_GETPROCESSTIMES
2379     HANDLE proc;
2380     FILETIME c, e, k, u;
2381     proc = GetCurrentProcess();
2382     GetProcessTimes(proc, &c, &e, &k, &u);
2383     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
2384 #else
2385     return av_gettime();
2386 #endif
2387 }
2388
2389 static int64_t getmaxrss(void)
2390 {
2391 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
2392     struct rusage rusage;
2393     getrusage(RUSAGE_SELF, &rusage);
2394     return (int64_t)rusage.ru_maxrss * 1024;
2395 #elif HAVE_GETPROCESSMEMORYINFO
2396     HANDLE proc;
2397     PROCESS_MEMORY_COUNTERS memcounters;
2398     proc = GetCurrentProcess();
2399     memcounters.cb = sizeof(memcounters);
2400     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
2401     return memcounters.PeakPagefileUsage;
2402 #else
2403     return 0;
2404 #endif
2405 }
2406
2407 static void parse_cpuflags(int argc, char **argv, const OptionDef *options)
2408 {
2409     int idx = locate_option(argc, argv, options, "cpuflags");
2410     if (idx && argv[idx + 1])
2411         opt_cpuflags(NULL, "cpuflags", argv[idx + 1]);
2412 }
2413
2414 int main(int argc, char **argv)
2415 {
2416     OptionsContext o = { 0 };
2417     int64_t ti;
2418
2419     atexit(exit_program);
2420
2421     reset_options(&o);
2422
2423     av_log_set_flags(AV_LOG_SKIP_REPEATED);
2424     parse_loglevel(argc, argv, options);
2425
2426     avcodec_register_all();
2427 #if CONFIG_AVDEVICE
2428     avdevice_register_all();
2429 #endif
2430     avfilter_register_all();
2431     av_register_all();
2432     avformat_network_init();
2433
2434     show_banner();
2435
2436     parse_cpuflags(argc, argv, options);
2437
2438     /* parse options */
2439     parse_options(&o, argc, argv, options, opt_output_file);
2440
2441     if (nb_output_files <= 0 && nb_input_files == 0) {
2442         show_usage();
2443         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
2444         exit(1);
2445     }
2446
2447     /* file converter / grab */
2448     if (nb_output_files <= 0) {
2449         fprintf(stderr, "At least one output file must be specified\n");
2450         exit(1);
2451     }
2452
2453     ti = getutime();
2454     if (transcode() < 0)
2455         exit(1);
2456     ti = getutime() - ti;
2457     if (do_benchmark) {
2458         int maxrss = getmaxrss() / 1024;
2459         printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
2460     }
2461
2462     exit(0);
2463     return 0;
2464 }