avconv.c

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