lzo: Drop obsolete fast_memcpy reference
[ffmpeg.git] / avconv.c
1 /*
2  * avconv main
3  * Copyright (c) 2000-2011 The libav developers.
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 #include "config.h"
23 #include <ctype.h>
24 #include <string.h>
25 #include <math.h>
26 #include <stdlib.h>
27 #include <errno.h>
28 #include <signal.h>
29 #include <limits.h>
30 #include "libavformat/avformat.h"
31 #include "libavdevice/avdevice.h"
32 #include "libswscale/swscale.h"
33 #include "libavresample/avresample.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/audioconvert.h"
36 #include "libavutil/parseutils.h"
37 #include "libavutil/samplefmt.h"
38 #include "libavutil/colorspace.h"
39 #include "libavutil/fifo.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/dict.h"
42 #include "libavutil/mathematics.h"
43 #include "libavutil/pixdesc.h"
44 #include "libavutil/avstring.h"
45 #include "libavutil/libm.h"
46 #include "libavutil/imgutils.h"
47 #include "libavutil/time.h"
48 #include "libavformat/os_support.h"
49
50 # include "libavfilter/avfilter.h"
51 # include "libavfilter/avfiltergraph.h"
52 # include "libavfilter/buffersrc.h"
53 # include "libavfilter/buffersink.h"
54
55 #if HAVE_SYS_RESOURCE_H
56 #include <sys/types.h>
57 #include <sys/resource.h>
58 #elif HAVE_GETPROCESSTIMES
59 #include <windows.h>
60 #endif
61 #if HAVE_GETPROCESSMEMORYINFO
62 #include <windows.h>
63 #include <psapi.h>
64 #endif
65
66 #if HAVE_SYS_SELECT_H
67 #include <sys/select.h>
68 #endif
69
70 #if HAVE_PTHREADS
71 #include <pthread.h>
72 #endif
73
74 #include <time.h>
75
76 #include "avconv.h"
77 #include "cmdutils.h"
78
79 #include "libavutil/avassert.h"
80
81 const char program_name[] = "avconv";
82 const int program_birth_year = 2000;
83
84 static FILE *vstats_file;
85
86 static int64_t video_size = 0;
87 static int64_t audio_size = 0;
88 static int64_t extra_size = 0;
89 static int nb_frames_dup = 0;
90 static int nb_frames_drop = 0;
91
92
93
94 #if HAVE_PTHREADS
95 /* signal to input threads that they should exit; set by the main thread */
96 static int transcoding_finished;
97 #endif
98
99 #define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
100
101 InputStream **input_streams = NULL;
102 int        nb_input_streams = 0;
103 InputFile   **input_files   = NULL;
104 int        nb_input_files   = 0;
105
106 OutputStream **output_streams = NULL;
107 int         nb_output_streams = 0;
108 OutputFile   **output_files   = NULL;
109 int         nb_output_files   = 0;
110
111 FilterGraph **filtergraphs;
112 int        nb_filtergraphs;
113
114 static void term_exit(void)
115 {
116     av_log(NULL, AV_LOG_QUIET, "");
117 }
118
119 static volatile int received_sigterm = 0;
120 static volatile int received_nb_signals = 0;
121
122 static void
123 sigterm_handler(int sig)
124 {
125     received_sigterm = sig;
126     received_nb_signals++;
127     term_exit();
128 }
129
130 static void term_init(void)
131 {
132     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
133     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
134 #ifdef SIGXCPU
135     signal(SIGXCPU, sigterm_handler);
136 #endif
137 }
138
139 static int decode_interrupt_cb(void *ctx)
140 {
141     return received_nb_signals > 1;
142 }
143
144 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
145
146 static void exit_program(void)
147 {
148     int i, j;
149
150     for (i = 0; i < nb_filtergraphs; i++) {
151         avfilter_graph_free(&filtergraphs[i]->graph);
152         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
153             av_freep(&filtergraphs[i]->inputs[j]->name);
154             av_freep(&filtergraphs[i]->inputs[j]);
155         }
156         av_freep(&filtergraphs[i]->inputs);
157         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
158             av_freep(&filtergraphs[i]->outputs[j]->name);
159             av_freep(&filtergraphs[i]->outputs[j]);
160         }
161         av_freep(&filtergraphs[i]->outputs);
162         av_freep(&filtergraphs[i]);
163     }
164     av_freep(&filtergraphs);
165
166     /* close files */
167     for (i = 0; i < nb_output_files; i++) {
168         AVFormatContext *s = output_files[i]->ctx;
169         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
170             avio_close(s->pb);
171         avformat_free_context(s);
172         av_dict_free(&output_files[i]->opts);
173         av_freep(&output_files[i]);
174     }
175     for (i = 0; i < nb_output_streams; i++) {
176         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
177         while (bsfc) {
178             AVBitStreamFilterContext *next = bsfc->next;
179             av_bitstream_filter_close(bsfc);
180             bsfc = next;
181         }
182         output_streams[i]->bitstream_filters = NULL;
183         avcodec_free_frame(&output_streams[i]->filtered_frame);
184
185         av_freep(&output_streams[i]->forced_keyframes);
186         av_freep(&output_streams[i]->avfilter);
187         av_freep(&output_streams[i]->logfile_prefix);
188         av_freep(&output_streams[i]);
189     }
190     for (i = 0; i < nb_input_files; i++) {
191         avformat_close_input(&input_files[i]->ctx);
192         av_freep(&input_files[i]);
193     }
194     for (i = 0; i < nb_input_streams; i++) {
195         avcodec_free_frame(&input_streams[i]->decoded_frame);
196         av_dict_free(&input_streams[i]->opts);
197         free_buffer_pool(&input_streams[i]->buffer_pool);
198         av_freep(&input_streams[i]->filters);
199         av_freep(&input_streams[i]);
200     }
201
202     if (vstats_file)
203         fclose(vstats_file);
204     av_free(vstats_filename);
205
206     av_freep(&input_streams);
207     av_freep(&input_files);
208     av_freep(&output_streams);
209     av_freep(&output_files);
210
211     uninit_opts();
212
213     avfilter_uninit();
214     avformat_network_deinit();
215
216     if (received_sigterm) {
217         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
218                (int) received_sigterm);
219         exit (255);
220     }
221 }
222
223 void assert_avoptions(AVDictionary *m)
224 {
225     AVDictionaryEntry *t;
226     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
227         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
228         exit(1);
229     }
230 }
231
232 static void assert_codec_experimental(AVCodecContext *c, int encoder)
233 {
234     const char *codec_string = encoder ? "encoder" : "decoder";
235     AVCodec *codec;
236     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
237         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
238         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
239                 "results.\nAdd '-strict experimental' if you want to use it.\n",
240                 codec_string, c->codec->name);
241         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
242         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
243             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
244                    codec_string, codec->name);
245         exit(1);
246     }
247 }
248
249 /*
250  * Update the requested input sample format based on the output sample format.
251  * This is currently only used to request float output from decoders which
252  * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
253  * Ideally this will be removed in the future when decoders do not do format
254  * conversion and only output in their native format.
255  */
256 static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
257                               AVCodecContext *enc)
258 {
259     /* if sample formats match or a decoder sample format has already been
260        requested, just return */
261     if (enc->sample_fmt == dec->sample_fmt ||
262         dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
263         return;
264
265     /* if decoder supports more than one output format */
266     if (dec_codec && dec_codec->sample_fmts &&
267         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
268         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
269         const enum AVSampleFormat *p;
270         int min_dec = INT_MAX, min_inc = INT_MAX;
271         enum AVSampleFormat dec_fmt = AV_SAMPLE_FMT_NONE;
272         enum AVSampleFormat inc_fmt = AV_SAMPLE_FMT_NONE;
273
274         /* find a matching sample format in the encoder */
275         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
276             if (*p == enc->sample_fmt) {
277                 dec->request_sample_fmt = *p;
278                 return;
279             } else {
280                 enum AVSampleFormat dfmt = av_get_packed_sample_fmt(*p);
281                 enum AVSampleFormat efmt = av_get_packed_sample_fmt(enc->sample_fmt);
282                 int fmt_diff = 32 * abs(dfmt - efmt);
283                 if (av_sample_fmt_is_planar(*p) !=
284                     av_sample_fmt_is_planar(enc->sample_fmt))
285                     fmt_diff++;
286                 if (dfmt == efmt) {
287                     min_inc = fmt_diff;
288                     inc_fmt = *p;
289                 } else if (dfmt > efmt) {
290                     if (fmt_diff < min_inc) {
291                         min_inc = fmt_diff;
292                         inc_fmt = *p;
293                     }
294                 } else {
295                     if (fmt_diff < min_dec) {
296                         min_dec = fmt_diff;
297                         dec_fmt = *p;
298                     }
299                 }
300             }
301         }
302
303         /* if none match, provide the one that matches quality closest */
304         dec->request_sample_fmt = min_inc != INT_MAX ? inc_fmt : dec_fmt;
305     }
306 }
307
308 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
309 {
310     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
311     AVCodecContext          *avctx = ost->st->codec;
312     int ret;
313
314     /*
315      * Audio encoders may split the packets --  #frames in != #packets out.
316      * But there is no reordering, so we can limit the number of output packets
317      * by simply dropping them here.
318      * Counting encoded video frames needs to be done separately because of
319      * reordering, see do_video_out()
320      */
321     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
322         if (ost->frame_number >= ost->max_frames) {
323             av_free_packet(pkt);
324             return;
325         }
326         ost->frame_number++;
327     }
328
329     while (bsfc) {
330         AVPacket new_pkt = *pkt;
331         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
332                                            &new_pkt.data, &new_pkt.size,
333                                            pkt->data, pkt->size,
334                                            pkt->flags & AV_PKT_FLAG_KEY);
335         if (a > 0) {
336             av_free_packet(pkt);
337             new_pkt.destruct = av_destruct_packet;
338         } else if (a < 0) {
339             av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
340                    bsfc->filter->name, pkt->stream_index,
341                    avctx->codec ? avctx->codec->name : "copy");
342             print_error("", a);
343             if (exit_on_error)
344                 exit(1);
345         }
346         *pkt = new_pkt;
347
348         bsfc = bsfc->next;
349     }
350
351     pkt->stream_index = ost->index;
352     ret = av_interleaved_write_frame(s, pkt);
353     if (ret < 0) {
354         print_error("av_interleaved_write_frame()", ret);
355         exit(1);
356     }
357 }
358
359 static int check_recording_time(OutputStream *ost)
360 {
361     OutputFile *of = output_files[ost->file_index];
362
363     if (of->recording_time != INT64_MAX &&
364         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
365                       AV_TIME_BASE_Q) >= 0) {
366         ost->finished = 1;
367         return 0;
368     }
369     return 1;
370 }
371
372 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
373                          AVFrame *frame)
374 {
375     AVCodecContext *enc = ost->st->codec;
376     AVPacket pkt;
377     int got_packet = 0;
378
379     av_init_packet(&pkt);
380     pkt.data = NULL;
381     pkt.size = 0;
382
383     if (!check_recording_time(ost))
384         return;
385
386     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
387         frame->pts = ost->sync_opts;
388     ost->sync_opts = frame->pts + frame->nb_samples;
389
390     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
391         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
392         exit(1);
393     }
394
395     if (got_packet) {
396         if (pkt.pts != AV_NOPTS_VALUE)
397             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
398         if (pkt.dts != AV_NOPTS_VALUE)
399             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
400         if (pkt.duration > 0)
401             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
402
403         write_frame(s, &pkt, ost);
404
405         audio_size += pkt.size;
406     }
407 }
408
409 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
410 {
411     AVCodecContext *dec;
412     AVPicture *picture2;
413     AVPicture picture_tmp;
414     uint8_t *buf = 0;
415
416     dec = ist->st->codec;
417
418     /* deinterlace : must be done before any resize */
419     if (do_deinterlace) {
420         int size;
421
422         /* create temporary picture */
423         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
424         buf  = av_malloc(size);
425         if (!buf)
426             return;
427
428         picture2 = &picture_tmp;
429         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
430
431         if (avpicture_deinterlace(picture2, picture,
432                                  dec->pix_fmt, dec->width, dec->height) < 0) {
433             /* if error, do not deinterlace */
434             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
435             av_free(buf);
436             buf = NULL;
437             picture2 = picture;
438         }
439     } else {
440         picture2 = picture;
441     }
442
443     if (picture != picture2)
444         *picture = *picture2;
445     *bufp = buf;
446 }
447
448 static void do_subtitle_out(AVFormatContext *s,
449                             OutputStream *ost,
450                             InputStream *ist,
451                             AVSubtitle *sub,
452                             int64_t pts)
453 {
454     static uint8_t *subtitle_out = NULL;
455     int subtitle_out_max_size = 1024 * 1024;
456     int subtitle_out_size, nb, i;
457     AVCodecContext *enc;
458     AVPacket pkt;
459
460     if (pts == AV_NOPTS_VALUE) {
461         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
462         if (exit_on_error)
463             exit(1);
464         return;
465     }
466
467     enc = ost->st->codec;
468
469     if (!subtitle_out) {
470         subtitle_out = av_malloc(subtitle_out_max_size);
471     }
472
473     /* Note: DVB subtitle need one packet to draw them and one other
474        packet to clear them */
475     /* XXX: signal it in the codec context ? */
476     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
477         nb = 2;
478     else
479         nb = 1;
480
481     for (i = 0; i < nb; i++) {
482         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
483         if (!check_recording_time(ost))
484             return;
485
486         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
487         // start_display_time is required to be 0
488         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
489         sub->end_display_time  -= sub->start_display_time;
490         sub->start_display_time = 0;
491         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
492                                                     subtitle_out_max_size, sub);
493         if (subtitle_out_size < 0) {
494             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
495             exit(1);
496         }
497
498         av_init_packet(&pkt);
499         pkt.data = subtitle_out;
500         pkt.size = subtitle_out_size;
501         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
502         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
503             /* XXX: the pts correction is handled here. Maybe handling
504                it in the codec would be better */
505             if (i == 0)
506                 pkt.pts += 90 * sub->start_display_time;
507             else
508                 pkt.pts += 90 * sub->end_display_time;
509         }
510         write_frame(s, &pkt, ost);
511     }
512 }
513
514 static void do_video_out(AVFormatContext *s,
515                          OutputStream *ost,
516                          AVFrame *in_picture,
517                          int *frame_size)
518 {
519     int ret, format_video_sync;
520     AVPacket pkt;
521     AVCodecContext *enc = ost->st->codec;
522
523     *frame_size = 0;
524
525     format_video_sync = video_sync_method;
526     if (format_video_sync == VSYNC_AUTO)
527         format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
528                             (s->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
529     if (format_video_sync != VSYNC_PASSTHROUGH &&
530         ost->frame_number &&
531         in_picture->pts != AV_NOPTS_VALUE &&
532         in_picture->pts < ost->sync_opts) {
533         nb_frames_drop++;
534         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
535         return;
536     }
537
538     if (in_picture->pts == AV_NOPTS_VALUE)
539         in_picture->pts = ost->sync_opts;
540     ost->sync_opts = in_picture->pts;
541
542
543     if (!ost->frame_number)
544         ost->first_pts = in_picture->pts;
545
546     av_init_packet(&pkt);
547     pkt.data = NULL;
548     pkt.size = 0;
549
550     if (!check_recording_time(ost) ||
551         ost->frame_number >= ost->max_frames)
552         return;
553
554     if (s->oformat->flags & AVFMT_RAWPICTURE &&
555         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
556         /* raw pictures are written as AVPicture structure to
557            avoid any copies. We support temporarily the older
558            method. */
559         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
560         enc->coded_frame->top_field_first  = in_picture->top_field_first;
561         pkt.data   = (uint8_t *)in_picture;
562         pkt.size   =  sizeof(AVPicture);
563         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
564         pkt.flags |= AV_PKT_FLAG_KEY;
565
566         write_frame(s, &pkt, ost);
567     } else {
568         int got_packet;
569         AVFrame big_picture;
570
571         big_picture = *in_picture;
572         /* better than nothing: use input picture interlaced
573            settings */
574         big_picture.interlaced_frame = in_picture->interlaced_frame;
575         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
576             if (ost->top_field_first == -1)
577                 big_picture.top_field_first = in_picture->top_field_first;
578             else
579                 big_picture.top_field_first = !!ost->top_field_first;
580         }
581
582         big_picture.quality = ost->st->codec->global_quality;
583         if (!enc->me_threshold)
584             big_picture.pict_type = 0;
585         if (ost->forced_kf_index < ost->forced_kf_count &&
586             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
587             big_picture.pict_type = AV_PICTURE_TYPE_I;
588             ost->forced_kf_index++;
589         }
590         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
591         if (ret < 0) {
592             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
593             exit(1);
594         }
595
596         if (got_packet) {
597             if (pkt.pts != AV_NOPTS_VALUE)
598                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
599             if (pkt.dts != AV_NOPTS_VALUE)
600                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
601
602             write_frame(s, &pkt, ost);
603             *frame_size = pkt.size;
604             video_size += pkt.size;
605
606             /* if two pass, output log */
607             if (ost->logfile && enc->stats_out) {
608                 fprintf(ost->logfile, "%s", enc->stats_out);
609             }
610         }
611     }
612     ost->sync_opts++;
613     /*
614      * For video, number of frames in == number of packets out.
615      * But there may be reordering, so we can't throw away frames on encoder
616      * flush, we need to limit them here, before they go into encoder.
617      */
618     ost->frame_number++;
619 }
620
621 static double psnr(double d)
622 {
623     return -10.0 * log(d) / log(10.0);
624 }
625
626 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
627                            int frame_size)
628 {
629     AVCodecContext *enc;
630     int frame_number;
631     double ti1, bitrate, avg_bitrate;
632
633     /* this is executed just the first time do_video_stats is called */
634     if (!vstats_file) {
635         vstats_file = fopen(vstats_filename, "w");
636         if (!vstats_file) {
637             perror("fopen");
638             exit(1);
639         }
640     }
641
642     enc = ost->st->codec;
643     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
644         frame_number = ost->frame_number;
645         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
646         if (enc->flags&CODEC_FLAG_PSNR)
647             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
648
649         fprintf(vstats_file,"f_size= %6d ", frame_size);
650         /* compute pts value */
651         ti1 = ost->sync_opts * av_q2d(enc->time_base);
652         if (ti1 < 0.01)
653             ti1 = 0.01;
654
655         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
656         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
657         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
658                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
659         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
660     }
661 }
662
663 /*
664  * Read one frame for lavfi output for ost and encode it.
665  */
666 static int poll_filter(OutputStream *ost)
667 {
668     OutputFile    *of = output_files[ost->file_index];
669     AVFilterBufferRef *picref;
670     AVFrame *filtered_frame = NULL;
671     int frame_size, ret;
672
673     if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
674         return AVERROR(ENOMEM);
675     } else
676         avcodec_get_frame_defaults(ost->filtered_frame);
677     filtered_frame = ost->filtered_frame;
678
679     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
680         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
681         ret = av_buffersink_read_samples(ost->filter->filter, &picref,
682                                          ost->st->codec->frame_size);
683     else
684         ret = av_buffersink_read(ost->filter->filter, &picref);
685
686     if (ret < 0)
687         return ret;
688
689     avfilter_copy_buf_props(filtered_frame, picref);
690     if (picref->pts != AV_NOPTS_VALUE) {
691         filtered_frame->pts = av_rescale_q(picref->pts,
692                                            ost->filter->filter->inputs[0]->time_base,
693                                            ost->st->codec->time_base) -
694                               av_rescale_q(of->start_time,
695                                            AV_TIME_BASE_Q,
696                                            ost->st->codec->time_base);
697
698         if (of->start_time && filtered_frame->pts < 0) {
699             avfilter_unref_buffer(picref);
700             return 0;
701         }
702     }
703
704     switch (ost->filter->filter->inputs[0]->type) {
705     case AVMEDIA_TYPE_VIDEO:
706         if (!ost->frame_aspect_ratio)
707             ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
708
709         do_video_out(of->ctx, ost, filtered_frame, &frame_size);
710         if (vstats_filename && frame_size)
711             do_video_stats(of->ctx, ost, frame_size);
712         break;
713     case AVMEDIA_TYPE_AUDIO:
714         do_audio_out(of->ctx, ost, filtered_frame);
715         break;
716     default:
717         // TODO support subtitle filters
718         av_assert0(0);
719     }
720
721     avfilter_unref_buffer(picref);
722
723     return 0;
724 }
725
726 /*
727  * Read as many frames from possible from lavfi and encode them.
728  *
729  * Always read from the active stream with the lowest timestamp. If no frames
730  * are available for it then return EAGAIN and wait for more input. This way we
731  * can use lavfi sources that generate unlimited amount of frames without memory
732  * usage exploding.
733  */
734 static int poll_filters(void)
735 {
736     int i, j, ret = 0;
737
738     while (ret >= 0 && !received_sigterm) {
739         OutputStream *ost = NULL;
740         int64_t min_pts = INT64_MAX;
741
742         /* choose output stream with the lowest timestamp */
743         for (i = 0; i < nb_output_streams; i++) {
744             int64_t pts = output_streams[i]->sync_opts;
745
746             if (!output_streams[i]->filter || output_streams[i]->finished)
747                 continue;
748
749             pts = av_rescale_q(pts, output_streams[i]->st->codec->time_base,
750                                AV_TIME_BASE_Q);
751             if (pts < min_pts) {
752                 min_pts = pts;
753                 ost = output_streams[i];
754             }
755         }
756
757         if (!ost)
758             break;
759
760         ret = poll_filter(ost);
761
762         if (ret == AVERROR_EOF) {
763             OutputFile *of = output_files[ost->file_index];
764
765             ost->finished = 1;
766
767             if (of->shortest) {
768                 for (j = 0; j < of->ctx->nb_streams; j++)
769                     output_streams[of->ost_index + j]->finished = 1;
770             }
771
772             ret = 0;
773         } else if (ret == AVERROR(EAGAIN))
774             return 0;
775     }
776
777     return ret;
778 }
779
780 static void print_report(int is_last_report, int64_t timer_start)
781 {
782     char buf[1024];
783     OutputStream *ost;
784     AVFormatContext *oc;
785     int64_t total_size;
786     AVCodecContext *enc;
787     int frame_number, vid, i;
788     double bitrate, ti1, pts;
789     static int64_t last_time = -1;
790     static int qp_histogram[52];
791
792     if (!print_stats && !is_last_report)
793         return;
794
795     if (!is_last_report) {
796         int64_t cur_time;
797         /* display the report every 0.5 seconds */
798         cur_time = av_gettime();
799         if (last_time == -1) {
800             last_time = cur_time;
801             return;
802         }
803         if ((cur_time - last_time) < 500000)
804             return;
805         last_time = cur_time;
806     }
807
808
809     oc = output_files[0]->ctx;
810
811     total_size = avio_size(oc->pb);
812     if (total_size < 0) // FIXME improve avio_size() so it works with non seekable output too
813         total_size = avio_tell(oc->pb);
814
815     buf[0] = '\0';
816     ti1 = 1e10;
817     vid = 0;
818     for (i = 0; i < nb_output_streams; i++) {
819         float q = -1;
820         ost = output_streams[i];
821         enc = ost->st->codec;
822         if (!ost->stream_copy && enc->coded_frame)
823             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
824         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
825             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
826         }
827         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
828             float t = (av_gettime() - timer_start) / 1000000.0;
829
830             frame_number = ost->frame_number;
831             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
832                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
833             if (is_last_report)
834                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
835             if (qp_hist) {
836                 int j;
837                 int qp = lrintf(q);
838                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
839                     qp_histogram[qp]++;
840                 for (j = 0; j < 32; j++)
841                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
842             }
843             if (enc->flags&CODEC_FLAG_PSNR) {
844                 int j;
845                 double error, error_sum = 0;
846                 double scale, scale_sum = 0;
847                 char type[3] = { 'Y','U','V' };
848                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
849                 for (j = 0; j < 3; j++) {
850                     if (is_last_report) {
851                         error = enc->error[j];
852                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
853                     } else {
854                         error = enc->coded_frame->error[j];
855                         scale = enc->width * enc->height * 255.0 * 255.0;
856                     }
857                     if (j)
858                         scale /= 4;
859                     error_sum += error;
860                     scale_sum += scale;
861                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
862                 }
863                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
864             }
865             vid = 1;
866         }
867         /* compute min output value */
868         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
869         if ((pts < ti1) && (pts > 0))
870             ti1 = pts;
871     }
872     if (ti1 < 0.01)
873         ti1 = 0.01;
874
875     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
876
877     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
878             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
879             (double)total_size / 1024, ti1, bitrate);
880
881     if (nb_frames_dup || nb_frames_drop)
882         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
883                 nb_frames_dup, nb_frames_drop);
884
885     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
886
887     fflush(stderr);
888
889     if (is_last_report) {
890         int64_t raw= audio_size + video_size + extra_size;
891         av_log(NULL, AV_LOG_INFO, "\n");
892         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
893                video_size / 1024.0,
894                audio_size / 1024.0,
895                extra_size / 1024.0,
896                100.0 * (total_size - raw) / raw
897         );
898     }
899 }
900
901 static void flush_encoders(void)
902 {
903     int i, ret;
904
905     for (i = 0; i < nb_output_streams; i++) {
906         OutputStream   *ost = output_streams[i];
907         AVCodecContext *enc = ost->st->codec;
908         AVFormatContext *os = output_files[ost->file_index]->ctx;
909         int stop_encoding = 0;
910
911         if (!ost->encoding_needed)
912             continue;
913
914         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
915             continue;
916         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
917             continue;
918
919         for (;;) {
920             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
921             const char *desc;
922             int64_t *size;
923
924             switch (ost->st->codec->codec_type) {
925             case AVMEDIA_TYPE_AUDIO:
926                 encode = avcodec_encode_audio2;
927                 desc   = "Audio";
928                 size   = &audio_size;
929                 break;
930             case AVMEDIA_TYPE_VIDEO:
931                 encode = avcodec_encode_video2;
932                 desc   = "Video";
933                 size   = &video_size;
934                 break;
935             default:
936                 stop_encoding = 1;
937             }
938
939             if (encode) {
940                 AVPacket pkt;
941                 int got_packet;
942                 av_init_packet(&pkt);
943                 pkt.data = NULL;
944                 pkt.size = 0;
945
946                 ret = encode(enc, &pkt, NULL, &got_packet);
947                 if (ret < 0) {
948                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
949                     exit(1);
950                 }
951                 *size += ret;
952                 if (ost->logfile && enc->stats_out) {
953                     fprintf(ost->logfile, "%s", enc->stats_out);
954                 }
955                 if (!got_packet) {
956                     stop_encoding = 1;
957                     break;
958                 }
959                 if (pkt.pts != AV_NOPTS_VALUE)
960                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
961                 if (pkt.dts != AV_NOPTS_VALUE)
962                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
963                 write_frame(os, &pkt, ost);
964             }
965
966             if (stop_encoding)
967                 break;
968         }
969     }
970 }
971
972 /*
973  * Check whether a packet from ist should be written into ost at this time
974  */
975 static int check_output_constraints(InputStream *ist, OutputStream *ost)
976 {
977     OutputFile *of = output_files[ost->file_index];
978     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
979
980     if (ost->source_index != ist_index)
981         return 0;
982
983     if (of->start_time && ist->last_dts < of->start_time)
984         return 0;
985
986     return 1;
987 }
988
989 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
990 {
991     OutputFile *of = output_files[ost->file_index];
992     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
993     AVPacket opkt;
994
995     av_init_packet(&opkt);
996
997     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
998         !ost->copy_initial_nonkeyframes)
999         return;
1000
1001     if (of->recording_time != INT64_MAX &&
1002         ist->last_dts >= of->recording_time + of->start_time) {
1003         ost->finished = 1;
1004         return;
1005     }
1006
1007     /* force the input stream PTS */
1008     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1009         audio_size += pkt->size;
1010     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1011         video_size += pkt->size;
1012         ost->sync_opts++;
1013     }
1014
1015     if (pkt->pts != AV_NOPTS_VALUE)
1016         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1017     else
1018         opkt.pts = AV_NOPTS_VALUE;
1019
1020     if (pkt->dts == AV_NOPTS_VALUE)
1021         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
1022     else
1023         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1024     opkt.dts -= ost_tb_start_time;
1025
1026     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1027     opkt.flags    = pkt->flags;
1028
1029     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1030     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1031        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1032        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1033        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1034        ) {
1035         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1036             opkt.destruct = av_destruct_packet;
1037     } else {
1038         opkt.data = pkt->data;
1039         opkt.size = pkt->size;
1040     }
1041
1042     write_frame(of->ctx, &opkt, ost);
1043     ost->st->codec->frame_number++;
1044     av_free_packet(&opkt);
1045 }
1046
1047 static void rate_emu_sleep(InputStream *ist)
1048 {
1049     if (input_files[ist->file_index]->rate_emu) {
1050         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
1051         int64_t now = av_gettime() - ist->start;
1052         if (pts > now)
1053             av_usleep(pts - now);
1054     }
1055 }
1056
1057 int guess_input_channel_layout(InputStream *ist)
1058 {
1059     AVCodecContext *dec = ist->st->codec;
1060
1061     if (!dec->channel_layout) {
1062         char layout_name[256];
1063
1064         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1065         if (!dec->channel_layout)
1066             return 0;
1067         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1068                                      dec->channels, dec->channel_layout);
1069         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1070                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1071     }
1072     return 1;
1073 }
1074
1075 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1076 {
1077     AVFrame *decoded_frame;
1078     AVCodecContext *avctx = ist->st->codec;
1079     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
1080     int i, ret, resample_changed;
1081
1082     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1083         return AVERROR(ENOMEM);
1084     else
1085         avcodec_get_frame_defaults(ist->decoded_frame);
1086     decoded_frame = ist->decoded_frame;
1087
1088     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1089     if (!*got_output || ret < 0) {
1090         if (!pkt->size) {
1091             for (i = 0; i < ist->nb_filters; i++)
1092                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1093         }
1094         return ret;
1095     }
1096
1097     /* if the decoder provides a pts, use it instead of the last packet pts.
1098        the decoder could be delaying output by a packet or more. */
1099     if (decoded_frame->pts != AV_NOPTS_VALUE)
1100         ist->next_dts = decoded_frame->pts;
1101     else if (pkt->pts != AV_NOPTS_VALUE) {
1102         decoded_frame->pts = pkt->pts;
1103         pkt->pts           = AV_NOPTS_VALUE;
1104     }
1105
1106     // preprocess audio (volume)
1107     if (audio_volume != 256) {
1108         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
1109         void *samples = decoded_frame->data[0];
1110         switch (avctx->sample_fmt) {
1111         case AV_SAMPLE_FMT_U8:
1112         {
1113             uint8_t *volp = samples;
1114             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1115                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
1116                 *volp++ = av_clip_uint8(v);
1117             }
1118             break;
1119         }
1120         case AV_SAMPLE_FMT_S16:
1121         {
1122             int16_t *volp = samples;
1123             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1124                 int v = ((*volp) * audio_volume + 128) >> 8;
1125                 *volp++ = av_clip_int16(v);
1126             }
1127             break;
1128         }
1129         case AV_SAMPLE_FMT_S32:
1130         {
1131             int32_t *volp = samples;
1132             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1133                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
1134                 *volp++ = av_clipl_int32(v);
1135             }
1136             break;
1137         }
1138         case AV_SAMPLE_FMT_FLT:
1139         {
1140             float *volp = samples;
1141             float scale = audio_volume / 256.f;
1142             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1143                 *volp++ *= scale;
1144             }
1145             break;
1146         }
1147         case AV_SAMPLE_FMT_DBL:
1148         {
1149             double *volp = samples;
1150             double scale = audio_volume / 256.;
1151             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1152                 *volp++ *= scale;
1153             }
1154             break;
1155         }
1156         default:
1157             av_log(NULL, AV_LOG_FATAL,
1158                    "Audio volume adjustment on sample format %s is not supported.\n",
1159                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
1160             exit(1);
1161         }
1162     }
1163
1164     rate_emu_sleep(ist);
1165
1166     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1167                        ist->resample_channels       != avctx->channels               ||
1168                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1169                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1170     if (resample_changed) {
1171         char layout1[64], layout2[64];
1172
1173         if (!guess_input_channel_layout(ist)) {
1174             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1175                    "layout for Input Stream #%d.%d\n", ist->file_index,
1176                    ist->st->index);
1177             exit(1);
1178         }
1179         decoded_frame->channel_layout = avctx->channel_layout;
1180
1181         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1182                                      ist->resample_channel_layout);
1183         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1184                                      decoded_frame->channel_layout);
1185
1186         av_log(NULL, AV_LOG_INFO,
1187                "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",
1188                ist->file_index, ist->st->index,
1189                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1190                ist->resample_channels, layout1,
1191                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1192                avctx->channels, layout2);
1193
1194         ist->resample_sample_fmt     = decoded_frame->format;
1195         ist->resample_sample_rate    = decoded_frame->sample_rate;
1196         ist->resample_channel_layout = decoded_frame->channel_layout;
1197         ist->resample_channels       = avctx->channels;
1198
1199         for (i = 0; i < nb_filtergraphs; i++)
1200             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1201                 configure_filtergraph(filtergraphs[i]) < 0) {
1202                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1203                 exit(1);
1204             }
1205     }
1206
1207     if (decoded_frame->pts != AV_NOPTS_VALUE)
1208         decoded_frame->pts = av_rescale_q(decoded_frame->pts,
1209                                           ist->st->time_base,
1210                                           (AVRational){1, ist->st->codec->sample_rate});
1211     for (i = 0; i < ist->nb_filters; i++)
1212         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1213
1214     return ret;
1215 }
1216
1217 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1218 {
1219     AVFrame *decoded_frame;
1220     void *buffer_to_free = NULL;
1221     int i, ret = 0, resample_changed;
1222
1223     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1224         return AVERROR(ENOMEM);
1225     else
1226         avcodec_get_frame_defaults(ist->decoded_frame);
1227     decoded_frame = ist->decoded_frame;
1228
1229     ret = avcodec_decode_video2(ist->st->codec,
1230                                 decoded_frame, got_output, pkt);
1231     if (!*got_output || ret < 0) {
1232         if (!pkt->size) {
1233             for (i = 0; i < ist->nb_filters; i++)
1234                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1235         }
1236         return ret;
1237     }
1238
1239     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
1240                                            decoded_frame->pkt_dts);
1241     pkt->size = 0;
1242     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
1243
1244     rate_emu_sleep(ist);
1245
1246     if (ist->st->sample_aspect_ratio.num)
1247         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1248
1249     resample_changed = ist->resample_width   != decoded_frame->width  ||
1250                        ist->resample_height  != decoded_frame->height ||
1251                        ist->resample_pix_fmt != decoded_frame->format;
1252     if (resample_changed) {
1253         av_log(NULL, AV_LOG_INFO,
1254                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1255                ist->file_index, ist->st->index,
1256                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1257                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1258
1259         ret = poll_filters();
1260         if (ret < 0 && (ret != AVERROR_EOF && ret != AVERROR(EAGAIN)))
1261             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
1262
1263         ist->resample_width   = decoded_frame->width;
1264         ist->resample_height  = decoded_frame->height;
1265         ist->resample_pix_fmt = decoded_frame->format;
1266
1267         for (i = 0; i < nb_filtergraphs; i++)
1268             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1269                 configure_filtergraph(filtergraphs[i]) < 0) {
1270                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1271                 exit(1);
1272             }
1273     }
1274
1275     for (i = 0; i < ist->nb_filters; i++) {
1276         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
1277             FrameBuffer      *buf = decoded_frame->opaque;
1278             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
1279                                         decoded_frame->data, decoded_frame->linesize,
1280                                         AV_PERM_READ | AV_PERM_PRESERVE,
1281                                         ist->st->codec->width, ist->st->codec->height,
1282                                         ist->st->codec->pix_fmt);
1283
1284             avfilter_copy_frame_props(fb, decoded_frame);
1285             fb->buf->priv           = buf;
1286             fb->buf->free           = filter_release_buffer;
1287
1288             buf->refcount++;
1289             av_buffersrc_buffer(ist->filters[i]->filter, fb);
1290         } else
1291             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1292     }
1293
1294     av_free(buffer_to_free);
1295     return ret;
1296 }
1297
1298 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1299 {
1300     AVSubtitle subtitle;
1301     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1302                                           &subtitle, got_output, pkt);
1303     if (ret < 0)
1304         return ret;
1305     if (!*got_output)
1306         return ret;
1307
1308     rate_emu_sleep(ist);
1309
1310     for (i = 0; i < nb_output_streams; i++) {
1311         OutputStream *ost = output_streams[i];
1312
1313         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1314             continue;
1315
1316         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
1317     }
1318
1319     avsubtitle_free(&subtitle);
1320     return ret;
1321 }
1322
1323 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1324 static int output_packet(InputStream *ist, const AVPacket *pkt)
1325 {
1326     int i;
1327     int got_output;
1328     AVPacket avpkt;
1329
1330     if (ist->next_dts == AV_NOPTS_VALUE)
1331         ist->next_dts = ist->last_dts;
1332
1333     if (pkt == NULL) {
1334         /* EOF handling */
1335         av_init_packet(&avpkt);
1336         avpkt.data = NULL;
1337         avpkt.size = 0;
1338         goto handle_eof;
1339     } else {
1340         avpkt = *pkt;
1341     }
1342
1343     if (pkt->dts != AV_NOPTS_VALUE)
1344         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1345
1346     // while we have more to decode or while the decoder did output something on EOF
1347     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1348         int ret = 0;
1349     handle_eof:
1350
1351         ist->last_dts = ist->next_dts;
1352
1353         if (avpkt.size && avpkt.size != pkt->size) {
1354             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1355                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1356             ist->showed_multi_packet_warning = 1;
1357         }
1358
1359         switch (ist->st->codec->codec_type) {
1360         case AVMEDIA_TYPE_AUDIO:
1361             ret = decode_audio    (ist, &avpkt, &got_output);
1362             break;
1363         case AVMEDIA_TYPE_VIDEO:
1364             ret = decode_video    (ist, &avpkt, &got_output);
1365             if (avpkt.duration)
1366                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1367             else if (ist->st->avg_frame_rate.num)
1368                 ist->next_dts += av_rescale_q(1, av_inv_q(ist->st->avg_frame_rate),
1369                                               AV_TIME_BASE_Q);
1370             else if (ist->st->codec->time_base.num != 0) {
1371                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
1372                                                    ist->st->codec->ticks_per_frame;
1373                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
1374             }
1375             break;
1376         case AVMEDIA_TYPE_SUBTITLE:
1377             ret = transcode_subtitles(ist, &avpkt, &got_output);
1378             break;
1379         default:
1380             return -1;
1381         }
1382
1383         if (ret < 0)
1384             return ret;
1385         // touch data and size only if not EOF
1386         if (pkt) {
1387             avpkt.data += ret;
1388             avpkt.size -= ret;
1389         }
1390         if (!got_output) {
1391             continue;
1392         }
1393     }
1394
1395     /* handle stream copy */
1396     if (!ist->decoding_needed) {
1397         rate_emu_sleep(ist);
1398         ist->last_dts = ist->next_dts;
1399         switch (ist->st->codec->codec_type) {
1400         case AVMEDIA_TYPE_AUDIO:
1401             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1402                              ist->st->codec->sample_rate;
1403             break;
1404         case AVMEDIA_TYPE_VIDEO:
1405             if (ist->st->codec->time_base.num != 0) {
1406                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
1407                 ist->next_dts += ((int64_t)AV_TIME_BASE *
1408                                   ist->st->codec->time_base.num * ticks) /
1409                                   ist->st->codec->time_base.den;
1410             }
1411             break;
1412         }
1413     }
1414     for (i = 0; pkt && i < nb_output_streams; i++) {
1415         OutputStream *ost = output_streams[i];
1416
1417         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1418             continue;
1419
1420         do_streamcopy(ist, ost, pkt);
1421     }
1422
1423     return 0;
1424 }
1425
1426 static void print_sdp(void)
1427 {
1428     char sdp[2048];
1429     int i;
1430     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
1431
1432     if (!avc)
1433         exit(1);
1434     for (i = 0; i < nb_output_files; i++)
1435         avc[i] = output_files[i]->ctx;
1436
1437     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
1438     printf("SDP:\n%s\n", sdp);
1439     fflush(stdout);
1440     av_freep(&avc);
1441 }
1442
1443 static int init_input_stream(int ist_index, char *error, int error_len)
1444 {
1445     int i;
1446     InputStream *ist = input_streams[ist_index];
1447     if (ist->decoding_needed) {
1448         AVCodec *codec = ist->dec;
1449         if (!codec) {
1450             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
1451                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
1452             return AVERROR(EINVAL);
1453         }
1454
1455         /* update requested sample format for the decoder based on the
1456            corresponding encoder sample format */
1457         for (i = 0; i < nb_output_streams; i++) {
1458             OutputStream *ost = output_streams[i];
1459             if (ost->source_index == ist_index) {
1460                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
1461                 break;
1462             }
1463         }
1464
1465         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
1466             ist->st->codec->get_buffer     = codec_get_buffer;
1467             ist->st->codec->release_buffer = codec_release_buffer;
1468             ist->st->codec->opaque         = &ist->buffer_pool;
1469         }
1470
1471         if (!av_dict_get(ist->opts, "threads", NULL, 0))
1472             av_dict_set(&ist->opts, "threads", "auto", 0);
1473         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
1474             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
1475                     ist->file_index, ist->st->index);
1476             return AVERROR(EINVAL);
1477         }
1478         assert_codec_experimental(ist->st->codec, 0);
1479         assert_avoptions(ist->opts);
1480     }
1481
1482     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;
1483     ist->next_dts = AV_NOPTS_VALUE;
1484     init_pts_correction(&ist->pts_ctx);
1485     ist->is_start = 1;
1486
1487     return 0;
1488 }
1489
1490 static InputStream *get_input_stream(OutputStream *ost)
1491 {
1492     if (ost->source_index >= 0)
1493         return input_streams[ost->source_index];
1494
1495     if (ost->filter) {
1496         FilterGraph *fg = ost->filter->graph;
1497         int i;
1498
1499         for (i = 0; i < fg->nb_inputs; i++)
1500             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
1501                 return fg->inputs[i]->ist;
1502     }
1503
1504     return NULL;
1505 }
1506
1507 static void parse_forced_key_frames(char *kf, OutputStream *ost,
1508                                     AVCodecContext *avctx)
1509 {
1510     char *p;
1511     int n = 1, i;
1512     int64_t t;
1513
1514     for (p = kf; *p; p++)
1515         if (*p == ',')
1516             n++;
1517     ost->forced_kf_count = n;
1518     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
1519     if (!ost->forced_kf_pts) {
1520         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
1521         exit(1);
1522     }
1523
1524     p = kf;
1525     for (i = 0; i < n; i++) {
1526         char *next = strchr(p, ',');
1527
1528         if (next)
1529             *next++ = 0;
1530
1531         t = parse_time_or_die("force_key_frames", p, 1);
1532         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
1533
1534         p = next;
1535     }
1536 }
1537
1538 static int transcode_init(void)
1539 {
1540     int ret = 0, i, j, k;
1541     AVFormatContext *oc;
1542     AVCodecContext *codec;
1543     OutputStream *ost;
1544     InputStream *ist;
1545     char error[1024];
1546     int want_sdp = 1;
1547
1548     /* init framerate emulation */
1549     for (i = 0; i < nb_input_files; i++) {
1550         InputFile *ifile = input_files[i];
1551         if (ifile->rate_emu)
1552             for (j = 0; j < ifile->nb_streams; j++)
1553                 input_streams[j + ifile->ist_index]->start = av_gettime();
1554     }
1555
1556     /* output stream init */
1557     for (i = 0; i < nb_output_files; i++) {
1558         oc = output_files[i]->ctx;
1559         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
1560             av_dump_format(oc, i, oc->filename, 1);
1561             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
1562             return AVERROR(EINVAL);
1563         }
1564     }
1565
1566     /* init complex filtergraphs */
1567     for (i = 0; i < nb_filtergraphs; i++)
1568         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
1569             return ret;
1570
1571     /* for each output stream, we compute the right encoding parameters */
1572     for (i = 0; i < nb_output_streams; i++) {
1573         AVCodecContext *icodec = NULL;
1574         ost = output_streams[i];
1575         oc  = output_files[ost->file_index]->ctx;
1576         ist = get_input_stream(ost);
1577
1578         if (ost->attachment_filename)
1579             continue;
1580
1581         codec  = ost->st->codec;
1582
1583         if (ist) {
1584             icodec = ist->st->codec;
1585
1586             ost->st->disposition          = ist->st->disposition;
1587             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
1588             codec->chroma_sample_location = icodec->chroma_sample_location;
1589         }
1590
1591         if (ost->stream_copy) {
1592             uint64_t extra_size;
1593
1594             av_assert0(ist && !ost->filter);
1595
1596             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
1597
1598             if (extra_size > INT_MAX) {
1599                 return AVERROR(EINVAL);
1600             }
1601
1602             /* if stream_copy is selected, no need to decode or encode */
1603             codec->codec_id   = icodec->codec_id;
1604             codec->codec_type = icodec->codec_type;
1605
1606             if (!codec->codec_tag) {
1607                 if (!oc->oformat->codec_tag ||
1608                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
1609                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
1610                     codec->codec_tag = icodec->codec_tag;
1611             }
1612
1613             codec->bit_rate       = icodec->bit_rate;
1614             codec->rc_max_rate    = icodec->rc_max_rate;
1615             codec->rc_buffer_size = icodec->rc_buffer_size;
1616             codec->field_order    = icodec->field_order;
1617             codec->extradata      = av_mallocz(extra_size);
1618             if (!codec->extradata) {
1619                 return AVERROR(ENOMEM);
1620             }
1621             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
1622             codec->extradata_size = icodec->extradata_size;
1623             if (!copy_tb) {
1624                 codec->time_base      = icodec->time_base;
1625                 codec->time_base.num *= icodec->ticks_per_frame;
1626                 av_reduce(&codec->time_base.num, &codec->time_base.den,
1627                           codec->time_base.num, codec->time_base.den, INT_MAX);
1628             } else
1629                 codec->time_base = ist->st->time_base;
1630
1631             switch (codec->codec_type) {
1632             case AVMEDIA_TYPE_AUDIO:
1633                 if (audio_volume != 256) {
1634                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
1635                     exit(1);
1636                 }
1637                 codec->channel_layout     = icodec->channel_layout;
1638                 codec->sample_rate        = icodec->sample_rate;
1639                 codec->channels           = icodec->channels;
1640                 codec->frame_size         = icodec->frame_size;
1641                 codec->audio_service_type = icodec->audio_service_type;
1642                 codec->block_align        = icodec->block_align;
1643                 break;
1644             case AVMEDIA_TYPE_VIDEO:
1645                 codec->pix_fmt            = icodec->pix_fmt;
1646                 codec->width              = icodec->width;
1647                 codec->height             = icodec->height;
1648                 codec->has_b_frames       = icodec->has_b_frames;
1649                 if (!codec->sample_aspect_ratio.num) {
1650                     codec->sample_aspect_ratio   =
1651                     ost->st->sample_aspect_ratio =
1652                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
1653                         ist->st->codec->sample_aspect_ratio.num ?
1654                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
1655                 }
1656                 break;
1657             case AVMEDIA_TYPE_SUBTITLE:
1658                 codec->width  = icodec->width;
1659                 codec->height = icodec->height;
1660                 break;
1661             case AVMEDIA_TYPE_DATA:
1662             case AVMEDIA_TYPE_ATTACHMENT:
1663                 break;
1664             default:
1665                 abort();
1666             }
1667         } else {
1668             if (!ost->enc) {
1669                 /* should only happen when a default codec is not present. */
1670                 snprintf(error, sizeof(error), "Automatic encoder selection "
1671                          "failed for output stream #%d:%d. Default encoder for "
1672                          "format %s is probably disabled. Please choose an "
1673                          "encoder manually.\n", ost->file_index, ost->index,
1674                          oc->oformat->name);
1675                 ret = AVERROR(EINVAL);
1676                 goto dump_format;
1677             }
1678
1679             if (ist)
1680                 ist->decoding_needed = 1;
1681             ost->encoding_needed = 1;
1682
1683             /*
1684              * We want CFR output if and only if one of those is true:
1685              * 1) user specified output framerate with -r
1686              * 2) user specified -vsync cfr
1687              * 3) output format is CFR and the user didn't force vsync to
1688              *    something else than CFR
1689              *
1690              * in such a case, set ost->frame_rate
1691              */
1692             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1693                 !ost->frame_rate.num && ist &&
1694                 (video_sync_method ==  VSYNC_CFR ||
1695                  (video_sync_method ==  VSYNC_AUTO &&
1696                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
1697                 ost->frame_rate = ist->framerate.num ? ist->framerate :
1698                                   ist->st->avg_frame_rate.num ?
1699                                   ist->st->avg_frame_rate :
1700                                   (AVRational){25, 1};
1701
1702                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
1703                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
1704                     ost->frame_rate = ost->enc->supported_framerates[idx];
1705                 }
1706             }
1707
1708             if (!ost->filter &&
1709                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
1710                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
1711                     FilterGraph *fg;
1712                     fg = init_simple_filtergraph(ist, ost);
1713                     if (configure_filtergraph(fg)) {
1714                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
1715                         exit(1);
1716                     }
1717             }
1718
1719             switch (codec->codec_type) {
1720             case AVMEDIA_TYPE_AUDIO:
1721                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
1722                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
1723                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
1724                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
1725                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
1726                 break;
1727             case AVMEDIA_TYPE_VIDEO:
1728                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
1729
1730                 codec->width  = ost->filter->filter->inputs[0]->w;
1731                 codec->height = ost->filter->filter->inputs[0]->h;
1732                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
1733                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
1734                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
1735                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
1736                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
1737
1738                 if (icodec &&
1739                     (codec->width   != icodec->width  ||
1740                      codec->height  != icodec->height ||
1741                      codec->pix_fmt != icodec->pix_fmt)) {
1742                     codec->bits_per_raw_sample = 0;
1743                 }
1744
1745                 if (ost->forced_keyframes)
1746                     parse_forced_key_frames(ost->forced_keyframes, ost,
1747                                             ost->st->codec);
1748                 break;
1749             case AVMEDIA_TYPE_SUBTITLE:
1750                 codec->time_base = (AVRational){1, 1000};
1751                 break;
1752             default:
1753                 abort();
1754                 break;
1755             }
1756             /* two pass mode */
1757             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
1758                 char logfilename[1024];
1759                 FILE *f;
1760
1761                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
1762                          ost->logfile_prefix ? ost->logfile_prefix :
1763                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
1764                          i);
1765                 if (!strcmp(ost->enc->name, "libx264")) {
1766                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
1767                 } else {
1768                     if (codec->flags & CODEC_FLAG_PASS1) {
1769                         f = fopen(logfilename, "wb");
1770                         if (!f) {
1771                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
1772                                    logfilename, strerror(errno));
1773                             exit(1);
1774                         }
1775                         ost->logfile = f;
1776                     } else {
1777                         char  *logbuffer;
1778                         size_t logbuffer_size;
1779                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
1780                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
1781                                    logfilename);
1782                             exit(1);
1783                         }
1784                         codec->stats_in = logbuffer;
1785                     }
1786                 }
1787             }
1788         }
1789     }
1790
1791     /* open each encoder */
1792     for (i = 0; i < nb_output_streams; i++) {
1793         ost = output_streams[i];
1794         if (ost->encoding_needed) {
1795             AVCodec      *codec = ost->enc;
1796             AVCodecContext *dec = NULL;
1797
1798             if ((ist = get_input_stream(ost)))
1799                 dec = ist->st->codec;
1800             if (dec && dec->subtitle_header) {
1801                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
1802                 if (!ost->st->codec->subtitle_header) {
1803                     ret = AVERROR(ENOMEM);
1804                     goto dump_format;
1805                 }
1806                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
1807                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
1808             }
1809             if (!av_dict_get(ost->opts, "threads", NULL, 0))
1810                 av_dict_set(&ost->opts, "threads", "auto", 0);
1811             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
1812                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
1813                         ost->file_index, ost->index);
1814                 ret = AVERROR(EINVAL);
1815                 goto dump_format;
1816             }
1817             assert_codec_experimental(ost->st->codec, 1);
1818             assert_avoptions(ost->opts);
1819             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
1820                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
1821                                              "It takes bits/s as argument, not kbits/s\n");
1822             extra_size += ost->st->codec->extradata_size;
1823
1824             if (ost->st->codec->me_threshold)
1825                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
1826         }
1827     }
1828
1829     /* init input streams */
1830     for (i = 0; i < nb_input_streams; i++)
1831         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
1832             goto dump_format;
1833
1834     /* discard unused programs */
1835     for (i = 0; i < nb_input_files; i++) {
1836         InputFile *ifile = input_files[i];
1837         for (j = 0; j < ifile->ctx->nb_programs; j++) {
1838             AVProgram *p = ifile->ctx->programs[j];
1839             int discard  = AVDISCARD_ALL;
1840
1841             for (k = 0; k < p->nb_stream_indexes; k++)
1842                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
1843                     discard = AVDISCARD_DEFAULT;
1844                     break;
1845                 }
1846             p->discard = discard;
1847         }
1848     }
1849
1850     /* open files and write file headers */
1851     for (i = 0; i < nb_output_files; i++) {
1852         oc = output_files[i]->ctx;
1853         oc->interrupt_callback = int_cb;
1854         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
1855             char errbuf[128];
1856             const char *errbuf_ptr = errbuf;
1857             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
1858                 errbuf_ptr = strerror(AVUNERROR(ret));
1859             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
1860             ret = AVERROR(EINVAL);
1861             goto dump_format;
1862         }
1863         assert_avoptions(output_files[i]->opts);
1864         if (strcmp(oc->oformat->name, "rtp")) {
1865             want_sdp = 0;
1866         }
1867     }
1868
1869  dump_format:
1870     /* dump the file output parameters - cannot be done before in case
1871        of stream copy */
1872     for (i = 0; i < nb_output_files; i++) {
1873         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
1874     }
1875
1876     /* dump the stream mapping */
1877     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
1878     for (i = 0; i < nb_input_streams; i++) {
1879         ist = input_streams[i];
1880
1881         for (j = 0; j < ist->nb_filters; j++) {
1882             if (ist->filters[j]->graph->graph_desc) {
1883                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
1884                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
1885                        ist->filters[j]->name);
1886                 if (nb_filtergraphs > 1)
1887                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
1888                 av_log(NULL, AV_LOG_INFO, "\n");
1889             }
1890         }
1891     }
1892
1893     for (i = 0; i < nb_output_streams; i++) {
1894         ost = output_streams[i];
1895
1896         if (ost->attachment_filename) {
1897             /* an attached file */
1898             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
1899                    ost->attachment_filename, ost->file_index, ost->index);
1900             continue;
1901         }
1902
1903         if (ost->filter && ost->filter->graph->graph_desc) {
1904             /* output from a complex graph */
1905             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
1906             if (nb_filtergraphs > 1)
1907                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
1908
1909             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
1910                    ost->index, ost->enc ? ost->enc->name : "?");
1911             continue;
1912         }
1913
1914         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
1915                input_streams[ost->source_index]->file_index,
1916                input_streams[ost->source_index]->st->index,
1917                ost->file_index,
1918                ost->index);
1919         if (ost->sync_ist != input_streams[ost->source_index])
1920             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
1921                    ost->sync_ist->file_index,
1922                    ost->sync_ist->st->index);
1923         if (ost->stream_copy)
1924             av_log(NULL, AV_LOG_INFO, " (copy)");
1925         else
1926             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
1927                    input_streams[ost->source_index]->dec->name : "?",
1928                    ost->enc ? ost->enc->name : "?");
1929         av_log(NULL, AV_LOG_INFO, "\n");
1930     }
1931
1932     if (ret) {
1933         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
1934         return ret;
1935     }
1936
1937     if (want_sdp) {
1938         print_sdp();
1939     }
1940
1941     return 0;
1942 }
1943
1944 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
1945 static int need_output(void)
1946 {
1947     int i;
1948
1949     for (i = 0; i < nb_output_streams; i++) {
1950         OutputStream *ost    = output_streams[i];
1951         OutputFile *of       = output_files[ost->file_index];
1952         AVFormatContext *os  = output_files[ost->file_index]->ctx;
1953
1954         if (ost->finished ||
1955             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
1956             continue;
1957         if (ost->frame_number >= ost->max_frames) {
1958             int j;
1959             for (j = 0; j < of->ctx->nb_streams; j++)
1960                 output_streams[of->ost_index + j]->finished = 1;
1961             continue;
1962         }
1963
1964         return 1;
1965     }
1966
1967     return 0;
1968 }
1969
1970 static InputFile *select_input_file(void)
1971 {
1972     InputFile *ifile = NULL;
1973     int64_t ipts_min = INT64_MAX;
1974     int i;
1975
1976     for (i = 0; i < nb_input_streams; i++) {
1977         InputStream *ist = input_streams[i];
1978         int64_t ipts     = ist->last_dts;
1979
1980         if (ist->discard || input_files[ist->file_index]->eagain)
1981             continue;
1982         if (!input_files[ist->file_index]->eof_reached) {
1983             if (ipts < ipts_min) {
1984                 ipts_min = ipts;
1985                 ifile    = input_files[ist->file_index];
1986             }
1987         }
1988     }
1989
1990     return ifile;
1991 }
1992
1993 #if HAVE_PTHREADS
1994 static void *input_thread(void *arg)
1995 {
1996     InputFile *f = arg;
1997     int ret = 0;
1998
1999     while (!transcoding_finished && ret >= 0) {
2000         AVPacket pkt;
2001         ret = av_read_frame(f->ctx, &pkt);
2002
2003         if (ret == AVERROR(EAGAIN)) {
2004             av_usleep(10000);
2005             ret = 0;
2006             continue;
2007         } else if (ret < 0)
2008             break;
2009
2010         pthread_mutex_lock(&f->fifo_lock);
2011         while (!av_fifo_space(f->fifo))
2012             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2013
2014         av_dup_packet(&pkt);
2015         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2016
2017         pthread_mutex_unlock(&f->fifo_lock);
2018     }
2019
2020     f->finished = 1;
2021     return NULL;
2022 }
2023
2024 static void free_input_threads(void)
2025 {
2026     int i;
2027
2028     if (nb_input_files == 1)
2029         return;
2030
2031     transcoding_finished = 1;
2032
2033     for (i = 0; i < nb_input_files; i++) {
2034         InputFile *f = input_files[i];
2035         AVPacket pkt;
2036
2037         if (!f->fifo || f->joined)
2038             continue;
2039
2040         pthread_mutex_lock(&f->fifo_lock);
2041         while (av_fifo_size(f->fifo)) {
2042             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2043             av_free_packet(&pkt);
2044         }
2045         pthread_cond_signal(&f->fifo_cond);
2046         pthread_mutex_unlock(&f->fifo_lock);
2047
2048         pthread_join(f->thread, NULL);
2049         f->joined = 1;
2050
2051         while (av_fifo_size(f->fifo)) {
2052             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2053             av_free_packet(&pkt);
2054         }
2055         av_fifo_free(f->fifo);
2056     }
2057 }
2058
2059 static int init_input_threads(void)
2060 {
2061     int i, ret;
2062
2063     if (nb_input_files == 1)
2064         return 0;
2065
2066     for (i = 0; i < nb_input_files; i++) {
2067         InputFile *f = input_files[i];
2068
2069         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2070             return AVERROR(ENOMEM);
2071
2072         pthread_mutex_init(&f->fifo_lock, NULL);
2073         pthread_cond_init (&f->fifo_cond, NULL);
2074
2075         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2076             return AVERROR(ret);
2077     }
2078     return 0;
2079 }
2080
2081 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2082 {
2083     int ret = 0;
2084
2085     pthread_mutex_lock(&f->fifo_lock);
2086
2087     if (av_fifo_size(f->fifo)) {
2088         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2089         pthread_cond_signal(&f->fifo_cond);
2090     } else {
2091         if (f->finished)
2092             ret = AVERROR_EOF;
2093         else
2094             ret = AVERROR(EAGAIN);
2095     }
2096
2097     pthread_mutex_unlock(&f->fifo_lock);
2098
2099     return ret;
2100 }
2101 #endif
2102
2103 static int get_input_packet(InputFile *f, AVPacket *pkt)
2104 {
2105 #if HAVE_PTHREADS
2106     if (nb_input_files > 1)
2107         return get_input_packet_mt(f, pkt);
2108 #endif
2109     return av_read_frame(f->ctx, pkt);
2110 }
2111
2112 static int got_eagain(void)
2113 {
2114     int i;
2115     for (i = 0; i < nb_input_files; i++)
2116         if (input_files[i]->eagain)
2117             return 1;
2118     return 0;
2119 }
2120
2121 static void reset_eagain(void)
2122 {
2123     int i;
2124     for (i = 0; i < nb_input_files; i++)
2125         input_files[i]->eagain = 0;
2126 }
2127
2128 /*
2129  * Read one packet from an input file and send it for
2130  * - decoding -> lavfi (audio/video)
2131  * - decoding -> encoding -> muxing (subtitles)
2132  * - muxing (streamcopy)
2133  *
2134  * Return
2135  * - 0 -- one packet was read and processed
2136  * - AVERROR(EAGAIN) -- no packets were available for selected file,
2137  *   this function should be called again
2138  * - AVERROR_EOF -- this function should not be called again
2139  */
2140 static int process_input(void)
2141 {
2142     InputFile *ifile;
2143     AVFormatContext *is;
2144     InputStream *ist;
2145     AVPacket pkt;
2146     int ret, i, j;
2147
2148     /* select the stream that we must read now */
2149     ifile = select_input_file();
2150     /* if none, if is finished */
2151     if (!ifile) {
2152         if (got_eagain()) {
2153             reset_eagain();
2154             av_usleep(10000);
2155             return AVERROR(EAGAIN);
2156         }
2157         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from.\n");
2158         return AVERROR_EOF;
2159     }
2160
2161     is  = ifile->ctx;
2162     ret = get_input_packet(ifile, &pkt);
2163
2164     if (ret == AVERROR(EAGAIN)) {
2165         ifile->eagain = 1;
2166         return ret;
2167     }
2168     if (ret < 0) {
2169         if (ret != AVERROR_EOF) {
2170             print_error(is->filename, ret);
2171             if (exit_on_error)
2172                 exit(1);
2173         }
2174         ifile->eof_reached = 1;
2175
2176         for (i = 0; i < ifile->nb_streams; i++) {
2177             ist = input_streams[ifile->ist_index + i];
2178             if (ist->decoding_needed)
2179                 output_packet(ist, NULL);
2180
2181             /* mark all outputs that don't go through lavfi as finished */
2182             for (j = 0; j < nb_output_streams; j++) {
2183                 OutputStream *ost = output_streams[j];
2184
2185                 if (ost->source_index == ifile->ist_index + i &&
2186                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
2187                     ost->finished= 1;
2188             }
2189         }
2190
2191         return AVERROR(EAGAIN);
2192     }
2193
2194     reset_eagain();
2195
2196     if (do_pkt_dump) {
2197         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2198                          is->streams[pkt.stream_index]);
2199     }
2200     /* the following test is needed in case new streams appear
2201        dynamically in stream : we ignore them */
2202     if (pkt.stream_index >= ifile->nb_streams)
2203         goto discard_packet;
2204
2205     ist = input_streams[ifile->ist_index + pkt.stream_index];
2206     if (ist->discard)
2207         goto discard_packet;
2208
2209     if (pkt.dts != AV_NOPTS_VALUE)
2210         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2211     if (pkt.pts != AV_NOPTS_VALUE)
2212         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2213
2214     if (pkt.pts != AV_NOPTS_VALUE)
2215         pkt.pts *= ist->ts_scale;
2216     if (pkt.dts != AV_NOPTS_VALUE)
2217         pkt.dts *= ist->ts_scale;
2218
2219     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
2220         (is->iformat->flags & AVFMT_TS_DISCONT)) {
2221         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2222         int64_t delta   = pkt_dts - ist->next_dts;
2223
2224         if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
2225             ifile->ts_offset -= delta;
2226             av_log(NULL, AV_LOG_DEBUG,
2227                    "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2228                    delta, ifile->ts_offset);
2229             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2230             if (pkt.pts != AV_NOPTS_VALUE)
2231                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2232         }
2233     }
2234
2235     ret = output_packet(ist, &pkt);
2236     if (ret < 0) {
2237         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
2238                ist->file_index, ist->st->index);
2239         if (exit_on_error)
2240             exit(1);
2241     }
2242
2243 discard_packet:
2244     av_free_packet(&pkt);
2245
2246     return 0;
2247 }
2248
2249 /*
2250  * The following code is the main loop of the file converter
2251  */
2252 static int transcode(void)
2253 {
2254     int ret, i, need_input = 1;
2255     AVFormatContext *os;
2256     OutputStream *ost;
2257     InputStream *ist;
2258     int64_t timer_start;
2259
2260     ret = transcode_init();
2261     if (ret < 0)
2262         goto fail;
2263
2264     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2265     term_init();
2266
2267     timer_start = av_gettime();
2268
2269 #if HAVE_PTHREADS
2270     if ((ret = init_input_threads()) < 0)
2271         goto fail;
2272 #endif
2273
2274     while (!received_sigterm) {
2275         /* check if there's any stream where output is still needed */
2276         if (!need_output()) {
2277             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2278             break;
2279         }
2280
2281         /* read and process one input packet if needed */
2282         if (need_input) {
2283             ret = process_input();
2284             if (ret == AVERROR_EOF)
2285                 need_input = 0;
2286         }
2287
2288         ret = poll_filters();
2289         if (ret < 0) {
2290             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
2291                 continue;
2292
2293             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
2294             break;
2295         }
2296
2297         /* dump report by using the output first video and audio streams */
2298         print_report(0, timer_start);
2299     }
2300 #if HAVE_PTHREADS
2301     free_input_threads();
2302 #endif
2303
2304     /* at the end of stream, we must flush the decoder buffers */
2305     for (i = 0; i < nb_input_streams; i++) {
2306         ist = input_streams[i];
2307         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
2308             output_packet(ist, NULL);
2309         }
2310     }
2311     poll_filters();
2312     flush_encoders();
2313
2314     term_exit();
2315
2316     /* write the trailer if needed and close file */
2317     for (i = 0; i < nb_output_files; i++) {
2318         os = output_files[i]->ctx;
2319         av_write_trailer(os);
2320     }
2321
2322     /* dump report by using the first video and audio streams */
2323     print_report(1, timer_start);
2324
2325     /* close each encoder */
2326     for (i = 0; i < nb_output_streams; i++) {
2327         ost = output_streams[i];
2328         if (ost->encoding_needed) {
2329             av_freep(&ost->st->codec->stats_in);
2330             avcodec_close(ost->st->codec);
2331         }
2332     }
2333
2334     /* close each decoder */
2335     for (i = 0; i < nb_input_streams; i++) {
2336         ist = input_streams[i];
2337         if (ist->decoding_needed) {
2338             avcodec_close(ist->st->codec);
2339         }
2340     }
2341
2342     /* finished ! */
2343     ret = 0;
2344
2345  fail:
2346 #if HAVE_PTHREADS
2347     free_input_threads();
2348 #endif
2349
2350     if (output_streams) {
2351         for (i = 0; i < nb_output_streams; i++) {
2352             ost = output_streams[i];
2353             if (ost) {
2354                 if (ost->stream_copy)
2355                     av_freep(&ost->st->codec->extradata);
2356                 if (ost->logfile) {
2357                     fclose(ost->logfile);
2358                     ost->logfile = NULL;
2359                 }
2360                 av_freep(&ost->st->codec->subtitle_header);
2361                 av_free(ost->forced_kf_pts);
2362                 av_dict_free(&ost->opts);
2363             }
2364         }
2365     }
2366     return ret;
2367 }
2368
2369 static int64_t getutime(void)
2370 {
2371 #if HAVE_GETRUSAGE
2372     struct rusage rusage;
2373
2374     getrusage(RUSAGE_SELF, &rusage);
2375     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
2376 #elif HAVE_GETPROCESSTIMES
2377     HANDLE proc;
2378     FILETIME c, e, k, u;
2379     proc = GetCurrentProcess();
2380     GetProcessTimes(proc, &c, &e, &k, &u);
2381     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
2382 #else
2383     return av_gettime();
2384 #endif
2385 }
2386
2387 static int64_t getmaxrss(void)
2388 {
2389 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
2390     struct rusage rusage;
2391     getrusage(RUSAGE_SELF, &rusage);
2392     return (int64_t)rusage.ru_maxrss * 1024;
2393 #elif HAVE_GETPROCESSMEMORYINFO
2394     HANDLE proc;
2395     PROCESS_MEMORY_COUNTERS memcounters;
2396     proc = GetCurrentProcess();
2397     memcounters.cb = sizeof(memcounters);
2398     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
2399     return memcounters.PeakPagefileUsage;
2400 #else
2401     return 0;
2402 #endif
2403 }
2404
2405 static void parse_cpuflags(int argc, char **argv, const OptionDef *options)
2406 {
2407     int idx = locate_option(argc, argv, options, "cpuflags");
2408     if (idx && argv[idx + 1])
2409         opt_cpuflags(NULL, "cpuflags", argv[idx + 1]);
2410 }
2411
2412 int main(int argc, char **argv)
2413 {
2414     OptionsContext o = { 0 };
2415     int64_t ti;
2416
2417     atexit(exit_program);
2418
2419     reset_options(&o);
2420
2421     av_log_set_flags(AV_LOG_SKIP_REPEATED);
2422     parse_loglevel(argc, argv, options);
2423
2424     avcodec_register_all();
2425 #if CONFIG_AVDEVICE
2426     avdevice_register_all();
2427 #endif
2428     avfilter_register_all();
2429     av_register_all();
2430     avformat_network_init();
2431
2432     show_banner();
2433
2434     parse_cpuflags(argc, argv, options);
2435
2436     /* parse options */
2437     parse_options(&o, argc, argv, options, opt_output_file);
2438
2439     if (nb_output_files <= 0 && nb_input_files == 0) {
2440         show_usage();
2441         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
2442         exit(1);
2443     }
2444
2445     /* file converter / grab */
2446     if (nb_output_files <= 0) {
2447         fprintf(stderr, "At least one output file must be specified\n");
2448         exit(1);
2449     }
2450
2451     ti = getutime();
2452     if (transcode() < 0)
2453         exit(1);
2454     ti = getutime() - ti;
2455     if (do_benchmark) {
2456         int maxrss = getmaxrss() / 1024;
2457         printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
2458     }
2459
2460     exit(0);
2461     return 0;
2462 }