6f6771186a944e147364eda36cc9033571a23054
[ffmpeg.git] / avconv.c
1 /*
2  * avconv main
3  * Copyright (c) 2000-2011 The libav developers.
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 #include "config.h"
23 #include <ctype.h>
24 #include <string.h>
25 #include <math.h>
26 #include <stdlib.h>
27 #include <errno.h>
28 #include <signal.h>
29 #include <limits.h>
30 #include "libavformat/avformat.h"
31 #include "libavdevice/avdevice.h"
32 #include "libswscale/swscale.h"
33 #include "libavresample/avresample.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/audioconvert.h"
36 #include "libavutil/parseutils.h"
37 #include "libavutil/samplefmt.h"
38 #include "libavutil/colorspace.h"
39 #include "libavutil/fifo.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/dict.h"
42 #include "libavutil/mathematics.h"
43 #include "libavutil/pixdesc.h"
44 #include "libavutil/avstring.h"
45 #include "libavutil/libm.h"
46 #include "libavutil/imgutils.h"
47 #include "libavutil/time.h"
48 #include "libavformat/os_support.h"
49
50 # include "libavfilter/avfilter.h"
51 # include "libavfilter/avfiltergraph.h"
52 # include "libavfilter/buffersrc.h"
53 # include "libavfilter/buffersink.h"
54
55 #if HAVE_SYS_RESOURCE_H
56 #include <sys/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(AVFormatContext *os, OutputStream *ost,
625                            int frame_size)
626 {
627     AVCodecContext *enc;
628     int frame_number;
629     double ti1, bitrate, avg_bitrate;
630
631     /* this is executed just the first time do_video_stats is called */
632     if (!vstats_file) {
633         vstats_file = fopen(vstats_filename, "w");
634         if (!vstats_file) {
635             perror("fopen");
636             exit(1);
637         }
638     }
639
640     enc = ost->st->codec;
641     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
642         frame_number = ost->frame_number;
643         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
644         if (enc->flags&CODEC_FLAG_PSNR)
645             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
646
647         fprintf(vstats_file,"f_size= %6d ", frame_size);
648         /* compute pts value */
649         ti1 = ost->sync_opts * av_q2d(enc->time_base);
650         if (ti1 < 0.01)
651             ti1 = 0.01;
652
653         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
654         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
655         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
656                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
657         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
658     }
659 }
660
661 /*
662  * Read one frame for lavfi output for ost and encode it.
663  */
664 static int poll_filter(OutputStream *ost)
665 {
666     OutputFile    *of = output_files[ost->file_index];
667     AVFilterBufferRef *picref;
668     AVFrame *filtered_frame = NULL;
669     int frame_size, ret;
670
671     if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
672         return AVERROR(ENOMEM);
673     } else
674         avcodec_get_frame_defaults(ost->filtered_frame);
675     filtered_frame = ost->filtered_frame;
676
677     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
678         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
679         ret = av_buffersink_read_samples(ost->filter->filter, &picref,
680                                          ost->st->codec->frame_size);
681     else
682         ret = av_buffersink_read(ost->filter->filter, &picref);
683
684     if (ret < 0)
685         return ret;
686
687     avfilter_copy_buf_props(filtered_frame, picref);
688     if (picref->pts != AV_NOPTS_VALUE) {
689         filtered_frame->pts = av_rescale_q(picref->pts,
690                                            ost->filter->filter->inputs[0]->time_base,
691                                            ost->st->codec->time_base) -
692                               av_rescale_q(of->start_time,
693                                            AV_TIME_BASE_Q,
694                                            ost->st->codec->time_base);
695
696         if (of->start_time && filtered_frame->pts < 0) {
697             avfilter_unref_buffer(picref);
698             return 0;
699         }
700     }
701
702     switch (ost->filter->filter->inputs[0]->type) {
703     case AVMEDIA_TYPE_VIDEO:
704         if (!ost->frame_aspect_ratio)
705             ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
706
707         do_video_out(of->ctx, ost, filtered_frame, &frame_size);
708         if (vstats_filename && frame_size)
709             do_video_stats(of->ctx, ost, frame_size);
710         break;
711     case AVMEDIA_TYPE_AUDIO:
712         do_audio_out(of->ctx, ost, filtered_frame);
713         break;
714     default:
715         // TODO support subtitle filters
716         av_assert0(0);
717     }
718
719     avfilter_unref_buffer(picref);
720
721     return 0;
722 }
723
724 /*
725  * Read as many frames from possible from lavfi and encode them.
726  *
727  * Always read from the active stream with the lowest timestamp. If no frames
728  * are available for it then return EAGAIN and wait for more input. This way we
729  * can use lavfi sources that generate unlimited amount of frames without memory
730  * usage exploding.
731  */
732 static int poll_filters(void)
733 {
734     int i, j, ret = 0;
735
736     while (ret >= 0 && !received_sigterm) {
737         OutputStream *ost = NULL;
738         int64_t min_pts = INT64_MAX;
739
740         /* choose output stream with the lowest timestamp */
741         for (i = 0; i < nb_output_streams; i++) {
742             int64_t pts = output_streams[i]->sync_opts;
743
744             if (!output_streams[i]->filter || output_streams[i]->finished)
745                 continue;
746
747             pts = av_rescale_q(pts, output_streams[i]->st->codec->time_base,
748                                AV_TIME_BASE_Q);
749             if (pts < min_pts) {
750                 min_pts = pts;
751                 ost = output_streams[i];
752             }
753         }
754
755         if (!ost)
756             break;
757
758         ret = poll_filter(ost);
759
760         if (ret == AVERROR_EOF) {
761             OutputFile *of = output_files[ost->file_index];
762
763             ost->finished = 1;
764
765             if (of->shortest) {
766                 for (j = 0; j < of->ctx->nb_streams; j++)
767                     output_streams[of->ost_index + j]->finished = 1;
768             }
769
770             ret = 0;
771         } else if (ret == AVERROR(EAGAIN))
772             return 0;
773     }
774
775     return ret;
776 }
777
778 static void print_report(int is_last_report, int64_t timer_start)
779 {
780     char buf[1024];
781     OutputStream *ost;
782     AVFormatContext *oc;
783     int64_t total_size;
784     AVCodecContext *enc;
785     int frame_number, vid, i;
786     double bitrate, ti1, pts;
787     static int64_t last_time = -1;
788     static int qp_histogram[52];
789
790     if (!print_stats && !is_last_report)
791         return;
792
793     if (!is_last_report) {
794         int64_t cur_time;
795         /* display the report every 0.5 seconds */
796         cur_time = av_gettime();
797         if (last_time == -1) {
798             last_time = cur_time;
799             return;
800         }
801         if ((cur_time - last_time) < 500000)
802             return;
803         last_time = cur_time;
804     }
805
806
807     oc = output_files[0]->ctx;
808
809     total_size = avio_size(oc->pb);
810     if (total_size < 0) // FIXME improve avio_size() so it works with non seekable output too
811         total_size = avio_tell(oc->pb);
812
813     buf[0] = '\0';
814     ti1 = 1e10;
815     vid = 0;
816     for (i = 0; i < nb_output_streams; i++) {
817         float q = -1;
818         ost = output_streams[i];
819         enc = ost->st->codec;
820         if (!ost->stream_copy && enc->coded_frame)
821             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
822         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
823             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
824         }
825         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
826             float t = (av_gettime() - timer_start) / 1000000.0;
827
828             frame_number = ost->frame_number;
829             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
830                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
831             if (is_last_report)
832                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
833             if (qp_hist) {
834                 int j;
835                 int qp = lrintf(q);
836                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
837                     qp_histogram[qp]++;
838                 for (j = 0; j < 32; j++)
839                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
840             }
841             if (enc->flags&CODEC_FLAG_PSNR) {
842                 int j;
843                 double error, error_sum = 0;
844                 double scale, scale_sum = 0;
845                 char type[3] = { 'Y','U','V' };
846                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
847                 for (j = 0; j < 3; j++) {
848                     if (is_last_report) {
849                         error = enc->error[j];
850                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
851                     } else {
852                         error = enc->coded_frame->error[j];
853                         scale = enc->width * enc->height * 255.0 * 255.0;
854                     }
855                     if (j)
856                         scale /= 4;
857                     error_sum += error;
858                     scale_sum += scale;
859                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
860                 }
861                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
862             }
863             vid = 1;
864         }
865         /* compute min output value */
866         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
867         if ((pts < ti1) && (pts > 0))
868             ti1 = pts;
869     }
870     if (ti1 < 0.01)
871         ti1 = 0.01;
872
873     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
874
875     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
876             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
877             (double)total_size / 1024, ti1, bitrate);
878
879     if (nb_frames_dup || nb_frames_drop)
880         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
881                 nb_frames_dup, nb_frames_drop);
882
883     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
884
885     fflush(stderr);
886
887     if (is_last_report) {
888         int64_t raw= audio_size + video_size + extra_size;
889         av_log(NULL, AV_LOG_INFO, "\n");
890         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
891                video_size / 1024.0,
892                audio_size / 1024.0,
893                extra_size / 1024.0,
894                100.0 * (total_size - raw) / raw
895         );
896     }
897 }
898
899 static void flush_encoders(void)
900 {
901     int i, ret;
902
903     for (i = 0; i < nb_output_streams; i++) {
904         OutputStream   *ost = output_streams[i];
905         AVCodecContext *enc = ost->st->codec;
906         AVFormatContext *os = output_files[ost->file_index]->ctx;
907         int stop_encoding = 0;
908
909         if (!ost->encoding_needed)
910             continue;
911
912         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
913             continue;
914         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
915             continue;
916
917         for (;;) {
918             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
919             const char *desc;
920             int64_t *size;
921
922             switch (ost->st->codec->codec_type) {
923             case AVMEDIA_TYPE_AUDIO:
924                 encode = avcodec_encode_audio2;
925                 desc   = "Audio";
926                 size   = &audio_size;
927                 break;
928             case AVMEDIA_TYPE_VIDEO:
929                 encode = avcodec_encode_video2;
930                 desc   = "Video";
931                 size   = &video_size;
932                 break;
933             default:
934                 stop_encoding = 1;
935             }
936
937             if (encode) {
938                 AVPacket pkt;
939                 int got_packet;
940                 av_init_packet(&pkt);
941                 pkt.data = NULL;
942                 pkt.size = 0;
943
944                 ret = encode(enc, &pkt, NULL, &got_packet);
945                 if (ret < 0) {
946                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
947                     exit(1);
948                 }
949                 *size += ret;
950                 if (ost->logfile && enc->stats_out) {
951                     fprintf(ost->logfile, "%s", enc->stats_out);
952                 }
953                 if (!got_packet) {
954                     stop_encoding = 1;
955                     break;
956                 }
957                 if (pkt.pts != AV_NOPTS_VALUE)
958                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
959                 if (pkt.dts != AV_NOPTS_VALUE)
960                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
961                 write_frame(os, &pkt, ost);
962             }
963
964             if (stop_encoding)
965                 break;
966         }
967     }
968 }
969
970 /*
971  * Check whether a packet from ist should be written into ost at this time
972  */
973 static int check_output_constraints(InputStream *ist, OutputStream *ost)
974 {
975     OutputFile *of = output_files[ost->file_index];
976     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
977
978     if (ost->source_index != ist_index)
979         return 0;
980
981     if (of->start_time && ist->last_dts < of->start_time)
982         return 0;
983
984     return 1;
985 }
986
987 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
988 {
989     OutputFile *of = output_files[ost->file_index];
990     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
991     AVPacket opkt;
992
993     av_init_packet(&opkt);
994
995     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
996         !ost->copy_initial_nonkeyframes)
997         return;
998
999     if (of->recording_time != INT64_MAX &&
1000         ist->last_dts >= of->recording_time + of->start_time) {
1001         ost->finished = 1;
1002         return;
1003     }
1004
1005     /* force the input stream PTS */
1006     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1007         audio_size += pkt->size;
1008     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1009         video_size += pkt->size;
1010         ost->sync_opts++;
1011     }
1012
1013     if (pkt->pts != AV_NOPTS_VALUE)
1014         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1015     else
1016         opkt.pts = AV_NOPTS_VALUE;
1017
1018     if (pkt->dts == AV_NOPTS_VALUE)
1019         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
1020     else
1021         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1022     opkt.dts -= ost_tb_start_time;
1023
1024     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1025     opkt.flags    = pkt->flags;
1026
1027     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1028     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1029        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1030        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1031        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1032        ) {
1033         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1034             opkt.destruct = av_destruct_packet;
1035     } else {
1036         opkt.data = pkt->data;
1037         opkt.size = pkt->size;
1038     }
1039
1040     write_frame(of->ctx, &opkt, ost);
1041     ost->st->codec->frame_number++;
1042     av_free_packet(&opkt);
1043 }
1044
1045 static void rate_emu_sleep(InputStream *ist)
1046 {
1047     if (input_files[ist->file_index]->rate_emu) {
1048         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
1049         int64_t now = av_gettime() - ist->start;
1050         if (pts > now)
1051             av_usleep(pts - now);
1052     }
1053 }
1054
1055 int guess_input_channel_layout(InputStream *ist)
1056 {
1057     AVCodecContext *dec = ist->st->codec;
1058
1059     if (!dec->channel_layout) {
1060         char layout_name[256];
1061
1062         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1063         if (!dec->channel_layout)
1064             return 0;
1065         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1066                                      dec->channels, dec->channel_layout);
1067         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1068                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1069     }
1070     return 1;
1071 }
1072
1073 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1074 {
1075     AVFrame *decoded_frame;
1076     AVCodecContext *avctx = ist->st->codec;
1077     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
1078     int i, ret, resample_changed;
1079
1080     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1081         return AVERROR(ENOMEM);
1082     else
1083         avcodec_get_frame_defaults(ist->decoded_frame);
1084     decoded_frame = ist->decoded_frame;
1085
1086     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1087     if (!*got_output || ret < 0) {
1088         if (!pkt->size) {
1089             for (i = 0; i < ist->nb_filters; i++)
1090                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1091         }
1092         return ret;
1093     }
1094
1095     /* if the decoder provides a pts, use it instead of the last packet pts.
1096        the decoder could be delaying output by a packet or more. */
1097     if (decoded_frame->pts != AV_NOPTS_VALUE)
1098         ist->next_dts = decoded_frame->pts;
1099     else if (pkt->pts != AV_NOPTS_VALUE) {
1100         decoded_frame->pts = pkt->pts;
1101         pkt->pts           = AV_NOPTS_VALUE;
1102     }
1103
1104     // preprocess audio (volume)
1105     if (audio_volume != 256) {
1106         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
1107         void *samples = decoded_frame->data[0];
1108         switch (avctx->sample_fmt) {
1109         case AV_SAMPLE_FMT_U8:
1110         {
1111             uint8_t *volp = samples;
1112             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1113                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
1114                 *volp++ = av_clip_uint8(v);
1115             }
1116             break;
1117         }
1118         case AV_SAMPLE_FMT_S16:
1119         {
1120             int16_t *volp = samples;
1121             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1122                 int v = ((*volp) * audio_volume + 128) >> 8;
1123                 *volp++ = av_clip_int16(v);
1124             }
1125             break;
1126         }
1127         case AV_SAMPLE_FMT_S32:
1128         {
1129             int32_t *volp = samples;
1130             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1131                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
1132                 *volp++ = av_clipl_int32(v);
1133             }
1134             break;
1135         }
1136         case AV_SAMPLE_FMT_FLT:
1137         {
1138             float *volp = samples;
1139             float scale = audio_volume / 256.f;
1140             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1141                 *volp++ *= scale;
1142             }
1143             break;
1144         }
1145         case AV_SAMPLE_FMT_DBL:
1146         {
1147             double *volp = samples;
1148             double scale = audio_volume / 256.;
1149             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1150                 *volp++ *= scale;
1151             }
1152             break;
1153         }
1154         default:
1155             av_log(NULL, AV_LOG_FATAL,
1156                    "Audio volume adjustment on sample format %s is not supported.\n",
1157                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
1158             exit(1);
1159         }
1160     }
1161
1162     rate_emu_sleep(ist);
1163
1164     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1165                        ist->resample_channels       != avctx->channels               ||
1166                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1167                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1168     if (resample_changed) {
1169         char layout1[64], layout2[64];
1170
1171         if (!guess_input_channel_layout(ist)) {
1172             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1173                    "layout for Input Stream #%d.%d\n", ist->file_index,
1174                    ist->st->index);
1175             exit(1);
1176         }
1177         decoded_frame->channel_layout = avctx->channel_layout;
1178
1179         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1180                                      ist->resample_channel_layout);
1181         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1182                                      decoded_frame->channel_layout);
1183
1184         av_log(NULL, AV_LOG_INFO,
1185                "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",
1186                ist->file_index, ist->st->index,
1187                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1188                ist->resample_channels, layout1,
1189                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1190                avctx->channels, layout2);
1191
1192         ist->resample_sample_fmt     = decoded_frame->format;
1193         ist->resample_sample_rate    = decoded_frame->sample_rate;
1194         ist->resample_channel_layout = decoded_frame->channel_layout;
1195         ist->resample_channels       = avctx->channels;
1196
1197         for (i = 0; i < nb_filtergraphs; i++)
1198             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1199                 configure_filtergraph(filtergraphs[i]) < 0) {
1200                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1201                 exit(1);
1202             }
1203     }
1204
1205     if (decoded_frame->pts != AV_NOPTS_VALUE)
1206         decoded_frame->pts = av_rescale_q(decoded_frame->pts,
1207                                           ist->st->time_base,
1208                                           (AVRational){1, ist->st->codec->sample_rate});
1209     for (i = 0; i < ist->nb_filters; i++)
1210         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1211
1212     return ret;
1213 }
1214
1215 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1216 {
1217     AVFrame *decoded_frame;
1218     void *buffer_to_free = NULL;
1219     int i, ret = 0, resample_changed;
1220
1221     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1222         return AVERROR(ENOMEM);
1223     else
1224         avcodec_get_frame_defaults(ist->decoded_frame);
1225     decoded_frame = ist->decoded_frame;
1226
1227     ret = avcodec_decode_video2(ist->st->codec,
1228                                 decoded_frame, got_output, pkt);
1229     if (!*got_output || ret < 0) {
1230         if (!pkt->size) {
1231             for (i = 0; i < ist->nb_filters; i++)
1232                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1233         }
1234         return ret;
1235     }
1236
1237     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
1238                                            decoded_frame->pkt_dts);
1239     pkt->size = 0;
1240     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
1241
1242     rate_emu_sleep(ist);
1243
1244     if (ist->st->sample_aspect_ratio.num)
1245         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1246
1247     resample_changed = ist->resample_width   != decoded_frame->width  ||
1248                        ist->resample_height  != decoded_frame->height ||
1249                        ist->resample_pix_fmt != decoded_frame->format;
1250     if (resample_changed) {
1251         av_log(NULL, AV_LOG_INFO,
1252                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1253                ist->file_index, ist->st->index,
1254                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1255                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1256
1257         ret = poll_filters();
1258         if (ret < 0 && (ret != AVERROR_EOF && ret != AVERROR(EAGAIN)))
1259             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
1260
1261         ist->resample_width   = decoded_frame->width;
1262         ist->resample_height  = decoded_frame->height;
1263         ist->resample_pix_fmt = decoded_frame->format;
1264
1265         for (i = 0; i < nb_filtergraphs; i++)
1266             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1267                 configure_filtergraph(filtergraphs[i]) < 0) {
1268                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1269                 exit(1);
1270             }
1271     }
1272
1273     for (i = 0; i < ist->nb_filters; i++) {
1274         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
1275             FrameBuffer      *buf = decoded_frame->opaque;
1276             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
1277                                         decoded_frame->data, decoded_frame->linesize,
1278                                         AV_PERM_READ | AV_PERM_PRESERVE,
1279                                         ist->st->codec->width, ist->st->codec->height,
1280                                         ist->st->codec->pix_fmt);
1281
1282             avfilter_copy_frame_props(fb, decoded_frame);
1283             fb->buf->priv           = buf;
1284             fb->buf->free           = filter_release_buffer;
1285
1286             buf->refcount++;
1287             av_buffersrc_buffer(ist->filters[i]->filter, fb);
1288         } else
1289             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1290     }
1291
1292     av_free(buffer_to_free);
1293     return ret;
1294 }
1295
1296 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1297 {
1298     AVSubtitle subtitle;
1299     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1300                                           &subtitle, got_output, pkt);
1301     if (ret < 0)
1302         return ret;
1303     if (!*got_output)
1304         return ret;
1305
1306     rate_emu_sleep(ist);
1307
1308     for (i = 0; i < nb_output_streams; i++) {
1309         OutputStream *ost = output_streams[i];
1310
1311         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1312             continue;
1313
1314         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
1315     }
1316
1317     avsubtitle_free(&subtitle);
1318     return ret;
1319 }
1320
1321 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1322 static int output_packet(InputStream *ist, const AVPacket *pkt)
1323 {
1324     int i;
1325     int got_output;
1326     AVPacket avpkt;
1327
1328     if (ist->next_dts == AV_NOPTS_VALUE)
1329         ist->next_dts = ist->last_dts;
1330
1331     if (pkt == NULL) {
1332         /* EOF handling */
1333         av_init_packet(&avpkt);
1334         avpkt.data = NULL;
1335         avpkt.size = 0;
1336         goto handle_eof;
1337     } else {
1338         avpkt = *pkt;
1339     }
1340
1341     if (pkt->dts != AV_NOPTS_VALUE)
1342         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1343
1344     // while we have more to decode or while the decoder did output something on EOF
1345     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1346         int ret = 0;
1347     handle_eof:
1348
1349         ist->last_dts = ist->next_dts;
1350
1351         if (avpkt.size && avpkt.size != pkt->size) {
1352             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1353                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1354             ist->showed_multi_packet_warning = 1;
1355         }
1356
1357         switch (ist->st->codec->codec_type) {
1358         case AVMEDIA_TYPE_AUDIO:
1359             ret = decode_audio    (ist, &avpkt, &got_output);
1360             break;
1361         case AVMEDIA_TYPE_VIDEO:
1362             ret = decode_video    (ist, &avpkt, &got_output);
1363             if (avpkt.duration)
1364                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1365             else if (ist->st->avg_frame_rate.num)
1366                 ist->next_dts += av_rescale_q(1, av_inv_q(ist->st->avg_frame_rate),
1367                                               AV_TIME_BASE_Q);
1368             else if (ist->st->codec->time_base.num != 0) {
1369                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
1370                                                    ist->st->codec->ticks_per_frame;
1371                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
1372             }
1373             break;
1374         case AVMEDIA_TYPE_SUBTITLE:
1375             ret = transcode_subtitles(ist, &avpkt, &got_output);
1376             break;
1377         default:
1378             return -1;
1379         }
1380
1381         if (ret < 0)
1382             return ret;
1383         // touch data and size only if not EOF
1384         if (pkt) {
1385             avpkt.data += ret;
1386             avpkt.size -= ret;
1387         }
1388         if (!got_output) {
1389             continue;
1390         }
1391     }
1392
1393     /* handle stream copy */
1394     if (!ist->decoding_needed) {
1395         rate_emu_sleep(ist);
1396         ist->last_dts = ist->next_dts;
1397         switch (ist->st->codec->codec_type) {
1398         case AVMEDIA_TYPE_AUDIO:
1399             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1400                              ist->st->codec->sample_rate;
1401             break;
1402         case AVMEDIA_TYPE_VIDEO:
1403             if (ist->st->codec->time_base.num != 0) {
1404                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
1405                 ist->next_dts += ((int64_t)AV_TIME_BASE *
1406                                   ist->st->codec->time_base.num * ticks) /
1407                                   ist->st->codec->time_base.den;
1408             }
1409             break;
1410         }
1411     }
1412     for (i = 0; pkt && i < nb_output_streams; i++) {
1413         OutputStream *ost = output_streams[i];
1414
1415         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1416             continue;
1417
1418         do_streamcopy(ist, ost, pkt);
1419     }
1420
1421     return 0;
1422 }
1423
1424 static void print_sdp(void)
1425 {
1426     char sdp[2048];
1427     int i;
1428     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
1429
1430     if (!avc)
1431         exit(1);
1432     for (i = 0; i < nb_output_files; i++)
1433         avc[i] = output_files[i]->ctx;
1434
1435     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
1436     printf("SDP:\n%s\n", sdp);
1437     fflush(stdout);
1438     av_freep(&avc);
1439 }
1440
1441 static int init_input_stream(int ist_index, char *error, int error_len)
1442 {
1443     int i, ret;
1444     InputStream *ist = input_streams[ist_index];
1445     if (ist->decoding_needed) {
1446         AVCodec *codec = ist->dec;
1447         if (!codec) {
1448             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
1449                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
1450             return AVERROR(EINVAL);
1451         }
1452
1453         /* update requested sample format for the decoder based on the
1454            corresponding encoder sample format */
1455         for (i = 0; i < nb_output_streams; i++) {
1456             OutputStream *ost = output_streams[i];
1457             if (ost->source_index == ist_index) {
1458                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
1459                 break;
1460             }
1461         }
1462
1463         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
1464             ist->st->codec->get_buffer     = codec_get_buffer;
1465             ist->st->codec->release_buffer = codec_release_buffer;
1466             ist->st->codec->opaque         = &ist->buffer_pool;
1467         }
1468
1469         if (!av_dict_get(ist->opts, "threads", NULL, 0))
1470             av_dict_set(&ist->opts, "threads", "auto", 0);
1471         if ((ret = avcodec_open2(ist->st->codec, codec, &ist->opts)) < 0) {
1472             if (ret == AVERROR_EXPERIMENTAL)
1473                 abort_codec_experimental(codec, 0);
1474             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
1475                     ist->file_index, ist->st->index);
1476             return ret;
1477         }
1478         assert_avoptions(ist->opts);
1479     }
1480
1481     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;
1482     ist->next_dts = AV_NOPTS_VALUE;
1483     init_pts_correction(&ist->pts_ctx);
1484     ist->is_start = 1;
1485
1486     return 0;
1487 }
1488
1489 static InputStream *get_input_stream(OutputStream *ost)
1490 {
1491     if (ost->source_index >= 0)
1492         return input_streams[ost->source_index];
1493
1494     if (ost->filter) {
1495         FilterGraph *fg = ost->filter->graph;
1496         int i;
1497
1498         for (i = 0; i < fg->nb_inputs; i++)
1499             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
1500                 return fg->inputs[i]->ist;
1501     }
1502
1503     return NULL;
1504 }
1505
1506 static void parse_forced_key_frames(char *kf, OutputStream *ost,
1507                                     AVCodecContext *avctx)
1508 {
1509     char *p;
1510     int n = 1, i;
1511     int64_t t;
1512
1513     for (p = kf; *p; p++)
1514         if (*p == ',')
1515             n++;
1516     ost->forced_kf_count = n;
1517     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
1518     if (!ost->forced_kf_pts) {
1519         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
1520         exit(1);
1521     }
1522
1523     p = kf;
1524     for (i = 0; i < n; i++) {
1525         char *next = strchr(p, ',');
1526
1527         if (next)
1528             *next++ = 0;
1529
1530         t = parse_time_or_die("force_key_frames", p, 1);
1531         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
1532
1533         p = next;
1534     }
1535 }
1536
1537 static int transcode_init(void)
1538 {
1539     int ret = 0, i, j, k;
1540     AVFormatContext *oc;
1541     AVCodecContext *codec;
1542     OutputStream *ost;
1543     InputStream *ist;
1544     char error[1024];
1545     int want_sdp = 1;
1546
1547     /* init framerate emulation */
1548     for (i = 0; i < nb_input_files; i++) {
1549         InputFile *ifile = input_files[i];
1550         if (ifile->rate_emu)
1551             for (j = 0; j < ifile->nb_streams; j++)
1552                 input_streams[j + ifile->ist_index]->start = av_gettime();
1553     }
1554
1555     /* output stream init */
1556     for (i = 0; i < nb_output_files; i++) {
1557         oc = output_files[i]->ctx;
1558         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
1559             av_dump_format(oc, i, oc->filename, 1);
1560             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
1561             return AVERROR(EINVAL);
1562         }
1563     }
1564
1565     /* init complex filtergraphs */
1566     for (i = 0; i < nb_filtergraphs; i++)
1567         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
1568             return ret;
1569
1570     /* for each output stream, we compute the right encoding parameters */
1571     for (i = 0; i < nb_output_streams; i++) {
1572         AVCodecContext *icodec = NULL;
1573         ost = output_streams[i];
1574         oc  = output_files[ost->file_index]->ctx;
1575         ist = get_input_stream(ost);
1576
1577         if (ost->attachment_filename)
1578             continue;
1579
1580         codec  = ost->st->codec;
1581
1582         if (ist) {
1583             icodec = ist->st->codec;
1584
1585             ost->st->disposition          = ist->st->disposition;
1586             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
1587             codec->chroma_sample_location = icodec->chroma_sample_location;
1588         }
1589
1590         if (ost->stream_copy) {
1591             uint64_t extra_size;
1592
1593             av_assert0(ist && !ost->filter);
1594
1595             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
1596
1597             if (extra_size > INT_MAX) {
1598                 return AVERROR(EINVAL);
1599             }
1600
1601             /* if stream_copy is selected, no need to decode or encode */
1602             codec->codec_id   = icodec->codec_id;
1603             codec->codec_type = icodec->codec_type;
1604
1605             if (!codec->codec_tag) {
1606                 if (!oc->oformat->codec_tag ||
1607                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
1608                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
1609                     codec->codec_tag = icodec->codec_tag;
1610             }
1611
1612             codec->bit_rate       = icodec->bit_rate;
1613             codec->rc_max_rate    = icodec->rc_max_rate;
1614             codec->rc_buffer_size = icodec->rc_buffer_size;
1615             codec->field_order    = icodec->field_order;
1616             codec->extradata      = av_mallocz(extra_size);
1617             if (!codec->extradata) {
1618                 return AVERROR(ENOMEM);
1619             }
1620             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
1621             codec->extradata_size = icodec->extradata_size;
1622             if (!copy_tb) {
1623                 codec->time_base      = icodec->time_base;
1624                 codec->time_base.num *= icodec->ticks_per_frame;
1625                 av_reduce(&codec->time_base.num, &codec->time_base.den,
1626                           codec->time_base.num, codec->time_base.den, INT_MAX);
1627             } else
1628                 codec->time_base = ist->st->time_base;
1629
1630             switch (codec->codec_type) {
1631             case AVMEDIA_TYPE_AUDIO:
1632                 if (audio_volume != 256) {
1633                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
1634                     exit(1);
1635                 }
1636                 codec->channel_layout     = icodec->channel_layout;
1637                 codec->sample_rate        = icodec->sample_rate;
1638                 codec->channels           = icodec->channels;
1639                 codec->frame_size         = icodec->frame_size;
1640                 codec->audio_service_type = icodec->audio_service_type;
1641                 codec->block_align        = icodec->block_align;
1642                 break;
1643             case AVMEDIA_TYPE_VIDEO:
1644                 codec->pix_fmt            = icodec->pix_fmt;
1645                 codec->width              = icodec->width;
1646                 codec->height             = icodec->height;
1647                 codec->has_b_frames       = icodec->has_b_frames;
1648                 if (!codec->sample_aspect_ratio.num) {
1649                     codec->sample_aspect_ratio   =
1650                     ost->st->sample_aspect_ratio =
1651                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
1652                         ist->st->codec->sample_aspect_ratio.num ?
1653                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
1654                 }
1655                 break;
1656             case AVMEDIA_TYPE_SUBTITLE:
1657                 codec->width  = icodec->width;
1658                 codec->height = icodec->height;
1659                 break;
1660             case AVMEDIA_TYPE_DATA:
1661             case AVMEDIA_TYPE_ATTACHMENT:
1662                 break;
1663             default:
1664                 abort();
1665             }
1666         } else {
1667             if (!ost->enc) {
1668                 /* should only happen when a default codec is not present. */
1669                 snprintf(error, sizeof(error), "Automatic encoder selection "
1670                          "failed for output stream #%d:%d. Default encoder for "
1671                          "format %s is probably disabled. Please choose an "
1672                          "encoder manually.\n", ost->file_index, ost->index,
1673                          oc->oformat->name);
1674                 ret = AVERROR(EINVAL);
1675                 goto dump_format;
1676             }
1677
1678             if (ist)
1679                 ist->decoding_needed = 1;
1680             ost->encoding_needed = 1;
1681
1682             /*
1683              * We want CFR output if and only if one of those is true:
1684              * 1) user specified output framerate with -r
1685              * 2) user specified -vsync cfr
1686              * 3) output format is CFR and the user didn't force vsync to
1687              *    something else than CFR
1688              *
1689              * in such a case, set ost->frame_rate
1690              */
1691             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1692                 !ost->frame_rate.num && ist &&
1693                 (video_sync_method ==  VSYNC_CFR ||
1694                  (video_sync_method ==  VSYNC_AUTO &&
1695                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
1696                 ost->frame_rate = ist->framerate.num ? ist->framerate :
1697                                   ist->st->avg_frame_rate.num ?
1698                                   ist->st->avg_frame_rate :
1699                                   (AVRational){25, 1};
1700
1701                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
1702                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
1703                     ost->frame_rate = ost->enc->supported_framerates[idx];
1704                 }
1705             }
1706
1707             if (!ost->filter &&
1708                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
1709                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
1710                     FilterGraph *fg;
1711                     fg = init_simple_filtergraph(ist, ost);
1712                     if (configure_filtergraph(fg)) {
1713                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
1714                         exit(1);
1715                     }
1716             }
1717
1718             switch (codec->codec_type) {
1719             case AVMEDIA_TYPE_AUDIO:
1720                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
1721                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
1722                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
1723                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
1724                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
1725                 break;
1726             case AVMEDIA_TYPE_VIDEO:
1727                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
1728
1729                 codec->width  = ost->filter->filter->inputs[0]->w;
1730                 codec->height = ost->filter->filter->inputs[0]->h;
1731                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
1732                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
1733                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
1734                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
1735                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
1736
1737                 if (icodec &&
1738                     (codec->width   != icodec->width  ||
1739                      codec->height  != icodec->height ||
1740                      codec->pix_fmt != icodec->pix_fmt)) {
1741                     codec->bits_per_raw_sample = 0;
1742                 }
1743
1744                 if (ost->forced_keyframes)
1745                     parse_forced_key_frames(ost->forced_keyframes, ost,
1746                                             ost->st->codec);
1747                 break;
1748             case AVMEDIA_TYPE_SUBTITLE:
1749                 codec->time_base = (AVRational){1, 1000};
1750                 break;
1751             default:
1752                 abort();
1753                 break;
1754             }
1755             /* two pass mode */
1756             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
1757                 char logfilename[1024];
1758                 FILE *f;
1759
1760                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
1761                          ost->logfile_prefix ? ost->logfile_prefix :
1762                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
1763                          i);
1764                 if (!strcmp(ost->enc->name, "libx264")) {
1765                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
1766                 } else {
1767                     if (codec->flags & CODEC_FLAG_PASS1) {
1768                         f = fopen(logfilename, "wb");
1769                         if (!f) {
1770                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
1771                                    logfilename, strerror(errno));
1772                             exit(1);
1773                         }
1774                         ost->logfile = f;
1775                     } else {
1776                         char  *logbuffer;
1777                         size_t logbuffer_size;
1778                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
1779                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
1780                                    logfilename);
1781                             exit(1);
1782                         }
1783                         codec->stats_in = logbuffer;
1784                     }
1785                 }
1786             }
1787         }
1788     }
1789
1790     /* open each encoder */
1791     for (i = 0; i < nb_output_streams; i++) {
1792         ost = output_streams[i];
1793         if (ost->encoding_needed) {
1794             AVCodec      *codec = ost->enc;
1795             AVCodecContext *dec = NULL;
1796
1797             if ((ist = get_input_stream(ost)))
1798                 dec = ist->st->codec;
1799             if (dec && dec->subtitle_header) {
1800                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
1801                 if (!ost->st->codec->subtitle_header) {
1802                     ret = AVERROR(ENOMEM);
1803                     goto dump_format;
1804                 }
1805                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
1806                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
1807             }
1808             if (!av_dict_get(ost->opts, "threads", NULL, 0))
1809                 av_dict_set(&ost->opts, "threads", "auto", 0);
1810             if ((ret = avcodec_open2(ost->st->codec, codec, &ost->opts)) < 0) {
1811                 if (ret == AVERROR_EXPERIMENTAL)
1812                     abort_codec_experimental(codec, 1);
1813                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
1814                         ost->file_index, ost->index);
1815                 goto dump_format;
1816             }
1817             assert_avoptions(ost->opts);
1818             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
1819                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
1820                                              "It takes bits/s as argument, not kbits/s\n");
1821             extra_size += ost->st->codec->extradata_size;
1822
1823             if (ost->st->codec->me_threshold)
1824                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
1825         }
1826     }
1827
1828     /* init input streams */
1829     for (i = 0; i < nb_input_streams; i++)
1830         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
1831             goto dump_format;
1832
1833     /* discard unused programs */
1834     for (i = 0; i < nb_input_files; i++) {
1835         InputFile *ifile = input_files[i];
1836         for (j = 0; j < ifile->ctx->nb_programs; j++) {
1837             AVProgram *p = ifile->ctx->programs[j];
1838             int discard  = AVDISCARD_ALL;
1839
1840             for (k = 0; k < p->nb_stream_indexes; k++)
1841                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
1842                     discard = AVDISCARD_DEFAULT;
1843                     break;
1844                 }
1845             p->discard = discard;
1846         }
1847     }
1848
1849     /* open files and write file headers */
1850     for (i = 0; i < nb_output_files; i++) {
1851         oc = output_files[i]->ctx;
1852         oc->interrupt_callback = int_cb;
1853         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
1854             char errbuf[128];
1855             const char *errbuf_ptr = errbuf;
1856             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
1857                 errbuf_ptr = strerror(AVUNERROR(ret));
1858             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
1859             ret = AVERROR(EINVAL);
1860             goto dump_format;
1861         }
1862         assert_avoptions(output_files[i]->opts);
1863         if (strcmp(oc->oformat->name, "rtp")) {
1864             want_sdp = 0;
1865         }
1866     }
1867
1868  dump_format:
1869     /* dump the file output parameters - cannot be done before in case
1870        of stream copy */
1871     for (i = 0; i < nb_output_files; i++) {
1872         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
1873     }
1874
1875     /* dump the stream mapping */
1876     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
1877     for (i = 0; i < nb_input_streams; i++) {
1878         ist = input_streams[i];
1879
1880         for (j = 0; j < ist->nb_filters; j++) {
1881             if (ist->filters[j]->graph->graph_desc) {
1882                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
1883                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
1884                        ist->filters[j]->name);
1885                 if (nb_filtergraphs > 1)
1886                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
1887                 av_log(NULL, AV_LOG_INFO, "\n");
1888             }
1889         }
1890     }
1891
1892     for (i = 0; i < nb_output_streams; i++) {
1893         ost = output_streams[i];
1894
1895         if (ost->attachment_filename) {
1896             /* an attached file */
1897             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
1898                    ost->attachment_filename, ost->file_index, ost->index);
1899             continue;
1900         }
1901
1902         if (ost->filter && ost->filter->graph->graph_desc) {
1903             /* output from a complex graph */
1904             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
1905             if (nb_filtergraphs > 1)
1906                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
1907
1908             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
1909                    ost->index, ost->enc ? ost->enc->name : "?");
1910             continue;
1911         }
1912
1913         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
1914                input_streams[ost->source_index]->file_index,
1915                input_streams[ost->source_index]->st->index,
1916                ost->file_index,
1917                ost->index);
1918         if (ost->sync_ist != input_streams[ost->source_index])
1919             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
1920                    ost->sync_ist->file_index,
1921                    ost->sync_ist->st->index);
1922         if (ost->stream_copy)
1923             av_log(NULL, AV_LOG_INFO, " (copy)");
1924         else
1925             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
1926                    input_streams[ost->source_index]->dec->name : "?",
1927                    ost->enc ? ost->enc->name : "?");
1928         av_log(NULL, AV_LOG_INFO, "\n");
1929     }
1930
1931     if (ret) {
1932         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
1933         return ret;
1934     }
1935
1936     if (want_sdp) {
1937         print_sdp();
1938     }
1939
1940     return 0;
1941 }
1942
1943 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
1944 static int need_output(void)
1945 {
1946     int i;
1947
1948     for (i = 0; i < nb_output_streams; i++) {
1949         OutputStream *ost    = output_streams[i];
1950         OutputFile *of       = output_files[ost->file_index];
1951         AVFormatContext *os  = output_files[ost->file_index]->ctx;
1952
1953         if (ost->finished ||
1954             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
1955             continue;
1956         if (ost->frame_number >= ost->max_frames) {
1957             int j;
1958             for (j = 0; j < of->ctx->nb_streams; j++)
1959                 output_streams[of->ost_index + j]->finished = 1;
1960             continue;
1961         }
1962
1963         return 1;
1964     }
1965
1966     return 0;
1967 }
1968
1969 static InputFile *select_input_file(void)
1970 {
1971     InputFile *ifile = NULL;
1972     int64_t ipts_min = INT64_MAX;
1973     int i;
1974
1975     for (i = 0; i < nb_input_streams; i++) {
1976         InputStream *ist = input_streams[i];
1977         int64_t ipts     = ist->last_dts;
1978
1979         if (ist->discard || input_files[ist->file_index]->eagain)
1980             continue;
1981         if (!input_files[ist->file_index]->eof_reached) {
1982             if (ipts < ipts_min) {
1983                 ipts_min = ipts;
1984                 ifile    = input_files[ist->file_index];
1985             }
1986         }
1987     }
1988
1989     return ifile;
1990 }
1991
1992 #if HAVE_PTHREADS
1993 static void *input_thread(void *arg)
1994 {
1995     InputFile *f = arg;
1996     int ret = 0;
1997
1998     while (!transcoding_finished && ret >= 0) {
1999         AVPacket pkt;
2000         ret = av_read_frame(f->ctx, &pkt);
2001
2002         if (ret == AVERROR(EAGAIN)) {
2003             av_usleep(10000);
2004             ret = 0;
2005             continue;
2006         } else if (ret < 0)
2007             break;
2008
2009         pthread_mutex_lock(&f->fifo_lock);
2010         while (!av_fifo_space(f->fifo))
2011             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2012
2013         av_dup_packet(&pkt);
2014         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2015
2016         pthread_mutex_unlock(&f->fifo_lock);
2017     }
2018
2019     f->finished = 1;
2020     return NULL;
2021 }
2022
2023 static void free_input_threads(void)
2024 {
2025     int i;
2026
2027     if (nb_input_files == 1)
2028         return;
2029
2030     transcoding_finished = 1;
2031
2032     for (i = 0; i < nb_input_files; i++) {
2033         InputFile *f = input_files[i];
2034         AVPacket pkt;
2035
2036         if (!f->fifo || f->joined)
2037             continue;
2038
2039         pthread_mutex_lock(&f->fifo_lock);
2040         while (av_fifo_size(f->fifo)) {
2041             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2042             av_free_packet(&pkt);
2043         }
2044         pthread_cond_signal(&f->fifo_cond);
2045         pthread_mutex_unlock(&f->fifo_lock);
2046
2047         pthread_join(f->thread, NULL);
2048         f->joined = 1;
2049
2050         while (av_fifo_size(f->fifo)) {
2051             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2052             av_free_packet(&pkt);
2053         }
2054         av_fifo_free(f->fifo);
2055     }
2056 }
2057
2058 static int init_input_threads(void)
2059 {
2060     int i, ret;
2061
2062     if (nb_input_files == 1)
2063         return 0;
2064
2065     for (i = 0; i < nb_input_files; i++) {
2066         InputFile *f = input_files[i];
2067
2068         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2069             return AVERROR(ENOMEM);
2070
2071         pthread_mutex_init(&f->fifo_lock, NULL);
2072         pthread_cond_init (&f->fifo_cond, NULL);
2073
2074         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2075             return AVERROR(ret);
2076     }
2077     return 0;
2078 }
2079
2080 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2081 {
2082     int ret = 0;
2083
2084     pthread_mutex_lock(&f->fifo_lock);
2085
2086     if (av_fifo_size(f->fifo)) {
2087         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2088         pthread_cond_signal(&f->fifo_cond);
2089     } else {
2090         if (f->finished)
2091             ret = AVERROR_EOF;
2092         else
2093             ret = AVERROR(EAGAIN);
2094     }
2095
2096     pthread_mutex_unlock(&f->fifo_lock);
2097
2098     return ret;
2099 }
2100 #endif
2101
2102 static int get_input_packet(InputFile *f, AVPacket *pkt)
2103 {
2104 #if HAVE_PTHREADS
2105     if (nb_input_files > 1)
2106         return get_input_packet_mt(f, pkt);
2107 #endif
2108     return av_read_frame(f->ctx, pkt);
2109 }
2110
2111 static int got_eagain(void)
2112 {
2113     int i;
2114     for (i = 0; i < nb_input_files; i++)
2115         if (input_files[i]->eagain)
2116             return 1;
2117     return 0;
2118 }
2119
2120 static void reset_eagain(void)
2121 {
2122     int i;
2123     for (i = 0; i < nb_input_files; i++)
2124         input_files[i]->eagain = 0;
2125 }
2126
2127 /*
2128  * Read one packet from an input file and send it for
2129  * - decoding -> lavfi (audio/video)
2130  * - decoding -> encoding -> muxing (subtitles)
2131  * - muxing (streamcopy)
2132  *
2133  * Return
2134  * - 0 -- one packet was read and processed
2135  * - AVERROR(EAGAIN) -- no packets were available for selected file,
2136  *   this function should be called again
2137  * - AVERROR_EOF -- this function should not be called again
2138  */
2139 static int process_input(void)
2140 {
2141     InputFile *ifile;
2142     AVFormatContext *is;
2143     InputStream *ist;
2144     AVPacket pkt;
2145     int ret, i, j;
2146
2147     /* select the stream that we must read now */
2148     ifile = select_input_file();
2149     /* if none, if is finished */
2150     if (!ifile) {
2151         if (got_eagain()) {
2152             reset_eagain();
2153             av_usleep(10000);
2154             return AVERROR(EAGAIN);
2155         }
2156         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from.\n");
2157         return AVERROR_EOF;
2158     }
2159
2160     is  = ifile->ctx;
2161     ret = get_input_packet(ifile, &pkt);
2162
2163     if (ret == AVERROR(EAGAIN)) {
2164         ifile->eagain = 1;
2165         return ret;
2166     }
2167     if (ret < 0) {
2168         if (ret != AVERROR_EOF) {
2169             print_error(is->filename, ret);
2170             if (exit_on_error)
2171                 exit(1);
2172         }
2173         ifile->eof_reached = 1;
2174
2175         for (i = 0; i < ifile->nb_streams; i++) {
2176             ist = input_streams[ifile->ist_index + i];
2177             if (ist->decoding_needed)
2178                 output_packet(ist, NULL);
2179
2180             /* mark all outputs that don't go through lavfi as finished */
2181             for (j = 0; j < nb_output_streams; j++) {
2182                 OutputStream *ost = output_streams[j];
2183
2184                 if (ost->source_index == ifile->ist_index + i &&
2185                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
2186                     ost->finished= 1;
2187             }
2188         }
2189
2190         return AVERROR(EAGAIN);
2191     }
2192
2193     reset_eagain();
2194
2195     if (do_pkt_dump) {
2196         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2197                          is->streams[pkt.stream_index]);
2198     }
2199     /* the following test is needed in case new streams appear
2200        dynamically in stream : we ignore them */
2201     if (pkt.stream_index >= ifile->nb_streams)
2202         goto discard_packet;
2203
2204     ist = input_streams[ifile->ist_index + pkt.stream_index];
2205     if (ist->discard)
2206         goto discard_packet;
2207
2208     if (pkt.dts != AV_NOPTS_VALUE)
2209         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2210     if (pkt.pts != AV_NOPTS_VALUE)
2211         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2212
2213     if (pkt.pts != AV_NOPTS_VALUE)
2214         pkt.pts *= ist->ts_scale;
2215     if (pkt.dts != AV_NOPTS_VALUE)
2216         pkt.dts *= ist->ts_scale;
2217
2218     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
2219         (is->iformat->flags & AVFMT_TS_DISCONT)) {
2220         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2221         int64_t delta   = pkt_dts - ist->next_dts;
2222
2223         if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
2224             ifile->ts_offset -= delta;
2225             av_log(NULL, AV_LOG_DEBUG,
2226                    "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2227                    delta, ifile->ts_offset);
2228             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2229             if (pkt.pts != AV_NOPTS_VALUE)
2230                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2231         }
2232     }
2233
2234     ret = output_packet(ist, &pkt);
2235     if (ret < 0) {
2236         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
2237                ist->file_index, ist->st->index);
2238         if (exit_on_error)
2239             exit(1);
2240     }
2241
2242 discard_packet:
2243     av_free_packet(&pkt);
2244
2245     return 0;
2246 }
2247
2248 /*
2249  * The following code is the main loop of the file converter
2250  */
2251 static int transcode(void)
2252 {
2253     int ret, i, need_input = 1;
2254     AVFormatContext *os;
2255     OutputStream *ost;
2256     InputStream *ist;
2257     int64_t timer_start;
2258
2259     ret = transcode_init();
2260     if (ret < 0)
2261         goto fail;
2262
2263     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2264     term_init();
2265
2266     timer_start = av_gettime();
2267
2268 #if HAVE_PTHREADS
2269     if ((ret = init_input_threads()) < 0)
2270         goto fail;
2271 #endif
2272
2273     while (!received_sigterm) {
2274         /* check if there's any stream where output is still needed */
2275         if (!need_output()) {
2276             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2277             break;
2278         }
2279
2280         /* read and process one input packet if needed */
2281         if (need_input) {
2282             ret = process_input();
2283             if (ret == AVERROR_EOF)
2284                 need_input = 0;
2285         }
2286
2287         ret = poll_filters();
2288         if (ret < 0) {
2289             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
2290                 continue;
2291
2292             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
2293             break;
2294         }
2295
2296         /* dump report by using the output first video and audio streams */
2297         print_report(0, timer_start);
2298     }
2299 #if HAVE_PTHREADS
2300     free_input_threads();
2301 #endif
2302
2303     /* at the end of stream, we must flush the decoder buffers */
2304     for (i = 0; i < nb_input_streams; i++) {
2305         ist = input_streams[i];
2306         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
2307             output_packet(ist, NULL);
2308         }
2309     }
2310     poll_filters();
2311     flush_encoders();
2312
2313     term_exit();
2314
2315     /* write the trailer if needed and close file */
2316     for (i = 0; i < nb_output_files; i++) {
2317         os = output_files[i]->ctx;
2318         av_write_trailer(os);
2319     }
2320
2321     /* dump report by using the first video and audio streams */
2322     print_report(1, timer_start);
2323
2324     /* close each encoder */
2325     for (i = 0; i < nb_output_streams; i++) {
2326         ost = output_streams[i];
2327         if (ost->encoding_needed) {
2328             av_freep(&ost->st->codec->stats_in);
2329             avcodec_close(ost->st->codec);
2330         }
2331     }
2332
2333     /* close each decoder */
2334     for (i = 0; i < nb_input_streams; i++) {
2335         ist = input_streams[i];
2336         if (ist->decoding_needed) {
2337             avcodec_close(ist->st->codec);
2338         }
2339     }
2340
2341     /* finished ! */
2342     ret = 0;
2343
2344  fail:
2345 #if HAVE_PTHREADS
2346     free_input_threads();
2347 #endif
2348
2349     if (output_streams) {
2350         for (i = 0; i < nb_output_streams; i++) {
2351             ost = output_streams[i];
2352             if (ost) {
2353                 if (ost->stream_copy)
2354                     av_freep(&ost->st->codec->extradata);
2355                 if (ost->logfile) {
2356                     fclose(ost->logfile);
2357                     ost->logfile = NULL;
2358                 }
2359                 av_freep(&ost->st->codec->subtitle_header);
2360                 av_free(ost->forced_kf_pts);
2361                 av_dict_free(&ost->opts);
2362             }
2363         }
2364     }
2365     return ret;
2366 }
2367
2368 static int64_t getutime(void)
2369 {
2370 #if HAVE_GETRUSAGE
2371     struct rusage rusage;
2372
2373     getrusage(RUSAGE_SELF, &rusage);
2374     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
2375 #elif HAVE_GETPROCESSTIMES
2376     HANDLE proc;
2377     FILETIME c, e, k, u;
2378     proc = GetCurrentProcess();
2379     GetProcessTimes(proc, &c, &e, &k, &u);
2380     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
2381 #else
2382     return av_gettime();
2383 #endif
2384 }
2385
2386 static int64_t getmaxrss(void)
2387 {
2388 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
2389     struct rusage rusage;
2390     getrusage(RUSAGE_SELF, &rusage);
2391     return (int64_t)rusage.ru_maxrss * 1024;
2392 #elif HAVE_GETPROCESSMEMORYINFO
2393     HANDLE proc;
2394     PROCESS_MEMORY_COUNTERS memcounters;
2395     proc = GetCurrentProcess();
2396     memcounters.cb = sizeof(memcounters);
2397     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
2398     return memcounters.PeakPagefileUsage;
2399 #else
2400     return 0;
2401 #endif
2402 }
2403
2404 static void parse_cpuflags(int argc, char **argv, const OptionDef *options)
2405 {
2406     int idx = locate_option(argc, argv, options, "cpuflags");
2407     if (idx && argv[idx + 1])
2408         opt_cpuflags(NULL, "cpuflags", argv[idx + 1]);
2409 }
2410
2411 int main(int argc, char **argv)
2412 {
2413     OptionsContext o = { 0 };
2414     int64_t ti;
2415
2416     atexit(exit_program);
2417
2418     reset_options(&o);
2419
2420     av_log_set_flags(AV_LOG_SKIP_REPEATED);
2421     parse_loglevel(argc, argv, options);
2422
2423     avcodec_register_all();
2424 #if CONFIG_AVDEVICE
2425     avdevice_register_all();
2426 #endif
2427     avfilter_register_all();
2428     av_register_all();
2429     avformat_network_init();
2430
2431     show_banner();
2432
2433     parse_cpuflags(argc, argv, options);
2434
2435     /* parse options */
2436     parse_options(&o, argc, argv, options, opt_output_file);
2437
2438     if (nb_output_files <= 0 && nb_input_files == 0) {
2439         show_usage();
2440         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
2441         exit(1);
2442     }
2443
2444     /* file converter / grab */
2445     if (nb_output_files <= 0) {
2446         fprintf(stderr, "At least one output file must be specified\n");
2447         exit(1);
2448     }
2449
2450     ti = getutime();
2451     if (transcode() < 0)
2452         exit(1);
2453     ti = getutime() - ti;
2454     if (do_benchmark) {
2455         int maxrss = getmaxrss() / 1024;
2456         printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
2457     }
2458
2459     exit(0);
2460     return 0;
2461 }