git.sesse.net Git - ffmpeg/blob - avconv.c

   1 /*
   2  * avconv main
   3  * Copyright (c) 2000-2011 The libav developers.
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * Libav is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with Libav; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "config.h"
  23 #include <ctype.h>
  24 #include <string.h>
  25 #include <math.h>
  26 #include <stdlib.h>
  27 #include <errno.h>
  28 #include <signal.h>
  29 #include <limits.h>
  30 #include "libavformat/avformat.h"
  31 #include "libavdevice/avdevice.h"
  32 #include "libswscale/swscale.h"
  33 #include "libavresample/avresample.h"
  34 #include "libavutil/opt.h"
  35 #include "libavutil/channel_layout.h"
  36 #include "libavutil/parseutils.h"
  37 #include "libavutil/samplefmt.h"
  38 #include "libavutil/colorspace.h"
  39 #include "libavutil/fifo.h"
  40 #include "libavutil/intreadwrite.h"
  41 #include "libavutil/dict.h"
  42 #include "libavutil/mathematics.h"
  43 #include "libavutil/pixdesc.h"
  44 #include "libavutil/avstring.h"
  45 #include "libavutil/libm.h"
  46 #include "libavutil/imgutils.h"
  47 #include "libavutil/time.h"
  48 #include "libavformat/os_support.h"
  49
  50 # include "libavfilter/avfilter.h"
  51 # include "libavfilter/avfiltergraph.h"
  52 # include "libavfilter/buffersrc.h"
  53 # include "libavfilter/buffersink.h"
  54
  55 #if HAVE_SYS_RESOURCE_H
  56 #include <sys/time.h>
  57 #include <sys/types.h>
  58 #include <sys/resource.h>
  59 #elif HAVE_GETPROCESSTIMES
  60 #include <windows.h>
  61 #endif
  62 #if HAVE_GETPROCESSMEMORYINFO
  63 #include <windows.h>
  64 #include <psapi.h>
  65 #endif
  66
  67 #if HAVE_SYS_SELECT_H
  68 #include <sys/select.h>
  69 #endif
  70
  71 #if HAVE_PTHREADS
  72 #include <pthread.h>
  73 #endif
  74
  75 #include <time.h>
  76
  77 #include "avconv.h"
  78 #include "cmdutils.h"
  79
  80 #include "libavutil/avassert.h"
  81
  82 const char program_name[] = "avconv";
  83 const int program_birth_year = 2000;
  84
  85 static FILE *vstats_file;
  86
  87 static int64_t video_size = 0;
  88 static int64_t audio_size = 0;
  89 static int64_t extra_size = 0;
  90 static int nb_frames_dup = 0;
  91 static int nb_frames_drop = 0;
  92
  93
  94
  95 #if HAVE_PTHREADS
  96 /* signal to input threads that they should exit; set by the main thread */
  97 static int transcoding_finished;
  98 #endif
  99
 100 #define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
 101
 102 InputStream **input_streams = NULL;
 103 int        nb_input_streams = 0;
 104 InputFile   **input_files   = NULL;
 105 int        nb_input_files   = 0;
 106
 107 OutputStream **output_streams = NULL;
 108 int         nb_output_streams = 0;
 109 OutputFile   **output_files   = NULL;
 110 int         nb_output_files   = 0;
 111
 112 FilterGraph **filtergraphs;
 113 int        nb_filtergraphs;
 114
 115 static void term_exit(void)
 116 {
 117     av_log(NULL, AV_LOG_QUIET, "");
 118 }
 119
 120 static volatile int received_sigterm = 0;
 121 static volatile int received_nb_signals = 0;
 122
 123 static void
 124 sigterm_handler(int sig)
 125 {
 126     received_sigterm = sig;
 127     received_nb_signals++;
 128     term_exit();
 129 }
 130
 131 static void term_init(void)
 132 {
 133     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
 134     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
 135 #ifdef SIGXCPU
 136     signal(SIGXCPU, sigterm_handler);
 137 #endif
 138 }
 139
 140 static int decode_interrupt_cb(void *ctx)
 141 {
 142     return received_nb_signals > 1;
 143 }
 144
 145 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
 146
 147 static void exit_program(void)
 148 {
 149     int i, j;
 150
 151     for (i = 0; i < nb_filtergraphs; i++) {
 152         avfilter_graph_free(&filtergraphs[i]->graph);
 153         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
 154             av_freep(&filtergraphs[i]->inputs[j]->name);
 155             av_freep(&filtergraphs[i]->inputs[j]);
 156         }
 157         av_freep(&filtergraphs[i]->inputs);
 158         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
 159             av_freep(&filtergraphs[i]->outputs[j]->name);
 160             av_freep(&filtergraphs[i]->outputs[j]);
 161         }
 162         av_freep(&filtergraphs[i]->outputs);
 163         av_freep(&filtergraphs[i]);
 164     }
 165     av_freep(&filtergraphs);
 166
 167     /* close files */
 168     for (i = 0; i < nb_output_files; i++) {
 169         AVFormatContext *s = output_files[i]->ctx;
 170         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
 171             avio_close(s->pb);
 172         avformat_free_context(s);
 173         av_dict_free(&output_files[i]->opts);
 174         av_freep(&output_files[i]);
 175     }
 176     for (i = 0; i < nb_output_streams; i++) {
 177         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
 178         while (bsfc) {
 179             AVBitStreamFilterContext *next = bsfc->next;
 180             av_bitstream_filter_close(bsfc);
 181             bsfc = next;
 182         }
 183         output_streams[i]->bitstream_filters = NULL;
 184         avcodec_free_frame(&output_streams[i]->filtered_frame);
 185
 186         av_freep(&output_streams[i]->forced_keyframes);
 187         av_freep(&output_streams[i]->avfilter);
 188         av_freep(&output_streams[i]->logfile_prefix);
 189         av_freep(&output_streams[i]);
 190     }
 191     for (i = 0; i < nb_input_files; i++) {
 192         avformat_close_input(&input_files[i]->ctx);
 193         av_freep(&input_files[i]);
 194     }
 195     for (i = 0; i < nb_input_streams; i++) {
 196         avcodec_free_frame(&input_streams[i]->decoded_frame);
 197         av_dict_free(&input_streams[i]->opts);
 198         free_buffer_pool(&input_streams[i]->buffer_pool);
 199         av_freep(&input_streams[i]->filters);
 200         av_freep(&input_streams[i]);
 201     }
 202
 203     if (vstats_file)
 204         fclose(vstats_file);
 205     av_free(vstats_filename);
 206
 207     av_freep(&input_streams);
 208     av_freep(&input_files);
 209     av_freep(&output_streams);
 210     av_freep(&output_files);
 211
 212     uninit_opts();
 213
 214     avfilter_uninit();
 215     avformat_network_deinit();
 216
 217     if (received_sigterm) {
 218         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
 219                (int) received_sigterm);
 220         exit (255);
 221     }
 222 }
 223
 224 void assert_avoptions(AVDictionary *m)
 225 {
 226     AVDictionaryEntry *t;
 227     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
 228         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
 229         exit(1);
 230     }
 231 }
 232
 233 static void abort_codec_experimental(AVCodec *c, int encoder)
 234 {
 235     const char *codec_string = encoder ? "encoder" : "decoder";
 236     AVCodec *codec;
 237     av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
 238             "results.\nAdd '-strict experimental' if you want to use it.\n",
 239             codec_string, c->name);
 240     codec = encoder ? avcodec_find_encoder(c->id) : avcodec_find_decoder(c->id);
 241     if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
 242         av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
 243                codec_string, codec->name);
 244     exit(1);
 245 }
 246
 247 /*
 248  * Update the requested input sample format based on the output sample format.
 249  * This is currently only used to request float output from decoders which
 250  * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
 251  * Ideally this will be removed in the future when decoders do not do format
 252  * conversion and only output in their native format.
 253  */
 254 static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
 255                               AVCodecContext *enc)
 256 {
 257     /* if sample formats match or a decoder sample format has already been
 258        requested, just return */
 259     if (enc->sample_fmt == dec->sample_fmt ||
 260         dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
 261         return;
 262
 263     /* if decoder supports more than one output format */
 264     if (dec_codec && dec_codec->sample_fmts &&
 265         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
 266         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
 267         const enum AVSampleFormat *p;
 268         int min_dec = INT_MAX, min_inc = INT_MAX;
 269         enum AVSampleFormat dec_fmt = AV_SAMPLE_FMT_NONE;
 270         enum AVSampleFormat inc_fmt = AV_SAMPLE_FMT_NONE;
 271
 272         /* find a matching sample format in the encoder */
 273         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
 274             if (*p == enc->sample_fmt) {
 275                 dec->request_sample_fmt = *p;
 276                 return;
 277             } else {
 278                 enum AVSampleFormat dfmt = av_get_packed_sample_fmt(*p);
 279                 enum AVSampleFormat efmt = av_get_packed_sample_fmt(enc->sample_fmt);
 280                 int fmt_diff = 32 * abs(dfmt - efmt);
 281                 if (av_sample_fmt_is_planar(*p) !=
 282                     av_sample_fmt_is_planar(enc->sample_fmt))
 283                     fmt_diff++;
 284                 if (dfmt == efmt) {
 285                     min_inc = fmt_diff;
 286                     inc_fmt = *p;
 287                 } else if (dfmt > efmt) {
 288                     if (fmt_diff < min_inc) {
 289                         min_inc = fmt_diff;
 290                         inc_fmt = *p;
 291                     }
 292                 } else {
 293                     if (fmt_diff < min_dec) {
 294                         min_dec = fmt_diff;
 295                         dec_fmt = *p;
 296                     }
 297                 }
 298             }
 299         }
 300
 301         /* if none match, provide the one that matches quality closest */
 302         dec->request_sample_fmt = min_inc != INT_MAX ? inc_fmt : dec_fmt;
 303     }
 304 }
 305
 306 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
 307 {
 308     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
 309     AVCodecContext          *avctx = ost->st->codec;
 310     int ret;
 311
 312     /*
 313      * Audio encoders may split the packets --  #frames in != #packets out.
 314      * But there is no reordering, so we can limit the number of output packets
 315      * by simply dropping them here.
 316      * Counting encoded video frames needs to be done separately because of
 317      * reordering, see do_video_out()
 318      */
 319     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
 320         if (ost->frame_number >= ost->max_frames) {
 321             av_free_packet(pkt);
 322             return;
 323         }
 324         ost->frame_number++;
 325     }
 326
 327     while (bsfc) {
 328         AVPacket new_pkt = *pkt;
 329         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
 330                                            &new_pkt.data, &new_pkt.size,
 331                                            pkt->data, pkt->size,
 332                                            pkt->flags & AV_PKT_FLAG_KEY);
 333         if (a > 0) {
 334             av_free_packet(pkt);
 335             new_pkt.destruct = av_destruct_packet;
 336         } else if (a < 0) {
 337             av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
 338                    bsfc->filter->name, pkt->stream_index,
 339                    avctx->codec ? avctx->codec->name : "copy");
 340             print_error("", a);
 341             if (exit_on_error)
 342                 exit(1);
 343         }
 344         *pkt = new_pkt;
 345
 346         bsfc = bsfc->next;
 347     }
 348
 349     pkt->stream_index = ost->index;
 350     ret = av_interleaved_write_frame(s, pkt);
 351     if (ret < 0) {
 352         print_error("av_interleaved_write_frame()", ret);
 353         exit(1);
 354     }
 355 }
 356
 357 static int check_recording_time(OutputStream *ost)
 358 {
 359     OutputFile *of = output_files[ost->file_index];
 360
 361     if (of->recording_time != INT64_MAX &&
 362         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
 363                       AV_TIME_BASE_Q) >= 0) {
 364         ost->finished = 1;
 365         return 0;
 366     }
 367     return 1;
 368 }
 369
 370 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
 371                          AVFrame *frame)
 372 {
 373     AVCodecContext *enc = ost->st->codec;
 374     AVPacket pkt;
 375     int got_packet = 0;
 376
 377     av_init_packet(&pkt);
 378     pkt.data = NULL;
 379     pkt.size = 0;
 380
 381     if (!check_recording_time(ost))
 382         return;
 383
 384     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
 385         frame->pts = ost->sync_opts;
 386     ost->sync_opts = frame->pts + frame->nb_samples;
 387
 388     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
 389         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
 390         exit(1);
 391     }
 392
 393     if (got_packet) {
 394         if (pkt.pts != AV_NOPTS_VALUE)
 395             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
 396         if (pkt.dts != AV_NOPTS_VALUE)
 397             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
 398         if (pkt.duration > 0)
 399             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
 400
 401         write_frame(s, &pkt, ost);
 402
 403         audio_size += pkt.size;
 404     }
 405 }
 406
 407 #if FF_API_DEINTERLACE
 408 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
 409 {
 410     AVCodecContext *dec;
 411     AVPicture *picture2;
 412     AVPicture picture_tmp;
 413     uint8_t *buf = 0;
 414
 415     dec = ist->st->codec;
 416
 417     /* deinterlace : must be done before any resize */
 418     if (do_deinterlace) {
 419         int size;
 420
 421         /* create temporary picture */
 422         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
 423         buf  = av_malloc(size);
 424         if (!buf)
 425             return;
 426
 427         picture2 = &picture_tmp;
 428         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
 429
 430         if (avpicture_deinterlace(picture2, picture,
 431                                  dec->pix_fmt, dec->width, dec->height) < 0) {
 432             /* if error, do not deinterlace */
 433             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
 434             av_free(buf);
 435             buf = NULL;
 436             picture2 = picture;
 437         }
 438     } else {
 439         picture2 = picture;
 440     }
 441
 442     if (picture != picture2)
 443         *picture = *picture2;
 444     *bufp = buf;
 445 }
 446 #endif
 447
 448 static void do_subtitle_out(AVFormatContext *s,
 449                             OutputStream *ost,
 450                             InputStream *ist,
 451                             AVSubtitle *sub,
 452                             int64_t pts)
 453 {
 454     static uint8_t *subtitle_out = NULL;
 455     int subtitle_out_max_size = 1024 * 1024;
 456     int subtitle_out_size, nb, i;
 457     AVCodecContext *enc;
 458     AVPacket pkt;
 459
 460     if (pts == AV_NOPTS_VALUE) {
 461         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
 462         if (exit_on_error)
 463             exit(1);
 464         return;
 465     }
 466
 467     enc = ost->st->codec;
 468
 469     if (!subtitle_out) {
 470         subtitle_out = av_malloc(subtitle_out_max_size);
 471     }
 472
 473     /* Note: DVB subtitle need one packet to draw them and one other
 474        packet to clear them */
 475     /* XXX: signal it in the codec context ? */
 476     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
 477         nb = 2;
 478     else
 479         nb = 1;
 480
 481     for (i = 0; i < nb; i++) {
 482         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
 483         if (!check_recording_time(ost))
 484             return;
 485
 486         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
 487         // start_display_time is required to be 0
 488         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
 489         sub->end_display_time  -= sub->start_display_time;
 490         sub->start_display_time = 0;
 491         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
 492                                                     subtitle_out_max_size, sub);
 493         if (subtitle_out_size < 0) {
 494             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
 495             exit(1);
 496         }
 497
 498         av_init_packet(&pkt);
 499         pkt.data = subtitle_out;
 500         pkt.size = subtitle_out_size;
 501         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
 502         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
 503             /* XXX: the pts correction is handled here. Maybe handling
 504                it in the codec would be better */
 505             if (i == 0)
 506                 pkt.pts += 90 * sub->start_display_time;
 507             else
 508                 pkt.pts += 90 * sub->end_display_time;
 509         }
 510         write_frame(s, &pkt, ost);
 511     }
 512 }
 513
 514 static void do_video_out(AVFormatContext *s,
 515                          OutputStream *ost,
 516                          AVFrame *in_picture,
 517                          int *frame_size)
 518 {
 519     int ret, format_video_sync;
 520     AVPacket pkt;
 521     AVCodecContext *enc = ost->st->codec;
 522
 523     *frame_size = 0;
 524
 525     format_video_sync = video_sync_method;
 526     if (format_video_sync == VSYNC_AUTO)
 527         format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
 528                             (s->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
 529     if (format_video_sync != VSYNC_PASSTHROUGH &&
 530         ost->frame_number &&
 531         in_picture->pts != AV_NOPTS_VALUE &&
 532         in_picture->pts < ost->sync_opts) {
 533         nb_frames_drop++;
 534         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
 535         return;
 536     }
 537
 538     if (in_picture->pts == AV_NOPTS_VALUE)
 539         in_picture->pts = ost->sync_opts;
 540     ost->sync_opts = in_picture->pts;
 541
 542
 543     if (!ost->frame_number)
 544         ost->first_pts = in_picture->pts;
 545
 546     av_init_packet(&pkt);
 547     pkt.data = NULL;
 548     pkt.size = 0;
 549
 550     if (!check_recording_time(ost) ||
 551         ost->frame_number >= ost->max_frames)
 552         return;
 553
 554     if (s->oformat->flags & AVFMT_RAWPICTURE &&
 555         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
 556         /* raw pictures are written as AVPicture structure to
 557            avoid any copies. We support temporarily the older
 558            method. */
 559         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
 560         enc->coded_frame->top_field_first  = in_picture->top_field_first;
 561         pkt.data   = (uint8_t *)in_picture;
 562         pkt.size   =  sizeof(AVPicture);
 563         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
 564         pkt.flags |= AV_PKT_FLAG_KEY;
 565
 566         write_frame(s, &pkt, ost);
 567     } else {
 568         int got_packet;
 569         AVFrame big_picture;
 570
 571         big_picture = *in_picture;
 572         /* better than nothing: use input picture interlaced
 573            settings */
 574         big_picture.interlaced_frame = in_picture->interlaced_frame;
 575         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
 576             if (ost->top_field_first == -1)
 577                 big_picture.top_field_first = in_picture->top_field_first;
 578             else
 579                 big_picture.top_field_first = !!ost->top_field_first;
 580         }
 581
 582         big_picture.quality = ost->st->codec->global_quality;
 583         if (!enc->me_threshold)
 584             big_picture.pict_type = 0;
 585         if (ost->forced_kf_index < ost->forced_kf_count &&
 586             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
 587             big_picture.pict_type = AV_PICTURE_TYPE_I;
 588             ost->forced_kf_index++;
 589         }
 590         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
 591         if (ret < 0) {
 592             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
 593             exit(1);
 594         }
 595
 596         if (got_packet) {
 597             if (pkt.pts != AV_NOPTS_VALUE)
 598                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
 599             if (pkt.dts != AV_NOPTS_VALUE)
 600                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
 601
 602             write_frame(s, &pkt, ost);
 603             *frame_size = pkt.size;
 604             video_size += pkt.size;
 605
 606             /* if two pass, output log */
 607             if (ost->logfile && enc->stats_out) {
 608                 fprintf(ost->logfile, "%s", enc->stats_out);
 609             }
 610         }
 611     }
 612     ost->sync_opts++;
 613     /*
 614      * For video, number of frames in == number of packets out.
 615      * But there may be reordering, so we can't throw away frames on encoder
 616      * flush, we need to limit them here, before they go into encoder.
 617      */
 618     ost->frame_number++;
 619 }
 620
 621 static double psnr(double d)
 622 {
 623     return -10.0 * log(d) / log(10.0);
 624 }
 625
 626 static void do_video_stats(OutputStream *ost, int frame_size)
 627 {
 628     AVCodecContext *enc;
 629     int frame_number;
 630     double ti1, bitrate, avg_bitrate;
 631
 632     /* this is executed just the first time do_video_stats is called */
 633     if (!vstats_file) {
 634         vstats_file = fopen(vstats_filename, "w");
 635         if (!vstats_file) {
 636             perror("fopen");
 637             exit(1);
 638         }
 639     }
 640
 641     enc = ost->st->codec;
 642     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
 643         frame_number = ost->frame_number;
 644         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
 645         if (enc->flags&CODEC_FLAG_PSNR)
 646             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
 647
 648         fprintf(vstats_file,"f_size= %6d ", frame_size);
 649         /* compute pts value */
 650         ti1 = ost->sync_opts * av_q2d(enc->time_base);
 651         if (ti1 < 0.01)
 652             ti1 = 0.01;
 653
 654         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
 655         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
 656         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
 657                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
 658         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
 659     }
 660 }
 661
 662 /*
 663  * Read one frame for lavfi output for ost and encode it.
 664  */
 665 static int poll_filter(OutputStream *ost)
 666 {
 667     OutputFile    *of = output_files[ost->file_index];
 668     AVFilterBufferRef *picref;
 669     AVFrame *filtered_frame = NULL;
 670     int frame_size, ret;
 671
 672     if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
 673         return AVERROR(ENOMEM);
 674     } else
 675         avcodec_get_frame_defaults(ost->filtered_frame);
 676     filtered_frame = ost->filtered_frame;
 677
 678     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
 679         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
 680         ret = av_buffersink_read_samples(ost->filter->filter, &picref,
 681                                          ost->st->codec->frame_size);
 682     else
 683         ret = av_buffersink_read(ost->filter->filter, &picref);
 684
 685     if (ret < 0)
 686         return ret;
 687
 688     avfilter_copy_buf_props(filtered_frame, picref);
 689     if (picref->pts != AV_NOPTS_VALUE) {
 690         filtered_frame->pts = av_rescale_q(picref->pts,
 691                                            ost->filter->filter->inputs[0]->time_base,
 692                                            ost->st->codec->time_base) -
 693                               av_rescale_q(of->start_time,
 694                                            AV_TIME_BASE_Q,
 695                                            ost->st->codec->time_base);
 696
 697         if (of->start_time && filtered_frame->pts < 0) {
 698             avfilter_unref_buffer(picref);
 699             return 0;
 700         }
 701     }
 702
 703     switch (ost->filter->filter->inputs[0]->type) {
 704     case AVMEDIA_TYPE_VIDEO:
 705         if (!ost->frame_aspect_ratio)
 706             ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
 707
 708         do_video_out(of->ctx, ost, filtered_frame, &frame_size);
 709         if (vstats_filename && frame_size)
 710             do_video_stats(ost, frame_size);
 711         break;
 712     case AVMEDIA_TYPE_AUDIO:
 713         do_audio_out(of->ctx, ost, filtered_frame);
 714         break;
 715     default:
 716         // TODO support subtitle filters
 717         av_assert0(0);
 718     }
 719
 720     avfilter_unref_buffer(picref);
 721
 722     return 0;
 723 }
 724
 725 /*
 726  * Read as many frames from possible from lavfi and encode them.
 727  *
 728  * Always read from the active stream with the lowest timestamp. If no frames
 729  * are available for it then return EAGAIN and wait for more input. This way we
 730  * can use lavfi sources that generate unlimited amount of frames without memory
 731  * usage exploding.
 732  */
 733 static int poll_filters(void)
 734 {
 735     int i, j, ret = 0;
 736
 737     while (ret >= 0 && !received_sigterm) {
 738         OutputStream *ost = NULL;
 739         int64_t min_pts = INT64_MAX;
 740
 741         /* choose output stream with the lowest timestamp */
 742         for (i = 0; i < nb_output_streams; i++) {
 743             int64_t pts = output_streams[i]->sync_opts;
 744
 745             if (!output_streams[i]->filter || output_streams[i]->finished)
 746                 continue;
 747
 748             pts = av_rescale_q(pts, output_streams[i]->st->codec->time_base,
 749                                AV_TIME_BASE_Q);
 750             if (pts < min_pts) {
 751                 min_pts = pts;
 752                 ost = output_streams[i];
 753             }
 754         }
 755
 756         if (!ost)
 757             break;
 758
 759         ret = poll_filter(ost);
 760
 761         if (ret == AVERROR_EOF) {
 762             OutputFile *of = output_files[ost->file_index];
 763
 764             ost->finished = 1;
 765
 766             if (of->shortest) {
 767                 for (j = 0; j < of->ctx->nb_streams; j++)
 768                     output_streams[of->ost_index + j]->finished = 1;
 769             }
 770
 771             ret = 0;
 772         } else if (ret == AVERROR(EAGAIN))
 773             return 0;
 774     }
 775
 776     return ret;
 777 }
 778
 779 static void print_report(int is_last_report, int64_t timer_start)
 780 {
 781     char buf[1024];
 782     OutputStream *ost;
 783     AVFormatContext *oc;
 784     int64_t total_size;
 785     AVCodecContext *enc;
 786     int frame_number, vid, i;
 787     double bitrate, ti1, pts;
 788     static int64_t last_time = -1;
 789     static int qp_histogram[52];
 790
 791     if (!print_stats && !is_last_report)
 792         return;
 793
 794     if (!is_last_report) {
 795         int64_t cur_time;
 796         /* display the report every 0.5 seconds */
 797         cur_time = av_gettime();
 798         if (last_time == -1) {
 799             last_time = cur_time;
 800             return;
 801         }
 802         if ((cur_time - last_time) < 500000)
 803             return;
 804         last_time = cur_time;
 805     }
 806
 807
 808     oc = output_files[0]->ctx;
 809
 810     total_size = avio_size(oc->pb);
 811     if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
 812         total_size = avio_tell(oc->pb);
 813     if (total_size < 0) {
 814         char errbuf[128];
 815         av_strerror(total_size, errbuf, sizeof(errbuf));
 816         av_log(NULL, AV_LOG_VERBOSE, "Bitrate not available, "
 817                "avio_tell() failed: %s\n", errbuf);
 818         total_size = 0;
 819     }
 820
 821     buf[0] = '\0';
 822     ti1 = 1e10;
 823     vid = 0;
 824     for (i = 0; i < nb_output_streams; i++) {
 825         float q = -1;
 826         ost = output_streams[i];
 827         enc = ost->st->codec;
 828         if (!ost->stream_copy && enc->coded_frame)
 829             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
 830         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
 831             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
 832         }
 833         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
 834             float t = (av_gettime() - timer_start) / 1000000.0;
 835
 836             frame_number = ost->frame_number;
 837             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
 838                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
 839             if (is_last_report)
 840                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
 841             if (qp_hist) {
 842                 int j;
 843                 int qp = lrintf(q);
 844                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
 845                     qp_histogram[qp]++;
 846                 for (j = 0; j < 32; j++)
 847                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
 848             }
 849             if (enc->flags&CODEC_FLAG_PSNR) {
 850                 int j;
 851                 double error, error_sum = 0;
 852                 double scale, scale_sum = 0;
 853                 char type[3] = { 'Y','U','V' };
 854                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
 855                 for (j = 0; j < 3; j++) {
 856                     if (is_last_report) {
 857                         error = enc->error[j];
 858                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
 859                     } else {
 860                         error = enc->coded_frame->error[j];
 861                         scale = enc->width * enc->height * 255.0 * 255.0;
 862                     }
 863                     if (j)
 864                         scale /= 4;
 865                     error_sum += error;
 866                     scale_sum += scale;
 867                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
 868                 }
 869                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
 870             }
 871             vid = 1;
 872         }
 873         /* compute min output value */
 874         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
 875         if ((pts < ti1) && (pts > 0))
 876             ti1 = pts;
 877     }
 878     if (ti1 < 0.01)
 879         ti1 = 0.01;
 880
 881     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
 882
 883     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 884             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
 885             (double)total_size / 1024, ti1, bitrate);
 886
 887     if (nb_frames_dup || nb_frames_drop)
 888         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
 889                 nb_frames_dup, nb_frames_drop);
 890
 891     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
 892
 893     fflush(stderr);
 894
 895     if (is_last_report) {
 896         int64_t raw= audio_size + video_size + extra_size;
 897         av_log(NULL, AV_LOG_INFO, "\n");
 898         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
 899                video_size / 1024.0,
 900                audio_size / 1024.0,
 901                extra_size / 1024.0,
 902                100.0 * (total_size - raw) / raw
 903         );
 904     }
 905 }
 906
 907 static void flush_encoders(void)
 908 {
 909     int i, ret;
 910
 911     for (i = 0; i < nb_output_streams; i++) {
 912         OutputStream   *ost = output_streams[i];
 913         AVCodecContext *enc = ost->st->codec;
 914         AVFormatContext *os = output_files[ost->file_index]->ctx;
 915         int stop_encoding = 0;
 916
 917         if (!ost->encoding_needed)
 918             continue;
 919
 920         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
 921             continue;
 922         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
 923             continue;
 924
 925         for (;;) {
 926             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
 927             const char *desc;
 928             int64_t *size;
 929
 930             switch (ost->st->codec->codec_type) {
 931             case AVMEDIA_TYPE_AUDIO:
 932                 encode = avcodec_encode_audio2;
 933                 desc   = "Audio";
 934                 size   = &audio_size;
 935                 break;
 936             case AVMEDIA_TYPE_VIDEO:
 937                 encode = avcodec_encode_video2;
 938                 desc   = "Video";
 939                 size   = &video_size;
 940                 break;
 941             default:
 942                 stop_encoding = 1;
 943             }
 944
 945             if (encode) {
 946                 AVPacket pkt;
 947                 int got_packet;
 948                 av_init_packet(&pkt);
 949                 pkt.data = NULL;
 950                 pkt.size = 0;
 951
 952                 ret = encode(enc, &pkt, NULL, &got_packet);
 953                 if (ret < 0) {
 954                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
 955                     exit(1);
 956                 }
 957                 *size += ret;
 958                 if (ost->logfile && enc->stats_out) {
 959                     fprintf(ost->logfile, "%s", enc->stats_out);
 960                 }
 961                 if (!got_packet) {
 962                     stop_encoding = 1;
 963                     break;
 964                 }
 965                 if (pkt.pts != AV_NOPTS_VALUE)
 966                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
 967                 if (pkt.dts != AV_NOPTS_VALUE)
 968                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
 969                 if (pkt.duration > 0)
 970                     pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
 971                 write_frame(os, &pkt, ost);
 972             }
 973
 974             if (stop_encoding)
 975                 break;
 976         }
 977     }
 978 }
 979
 980 /*
 981  * Check whether a packet from ist should be written into ost at this time
 982  */
 983 static int check_output_constraints(InputStream *ist, OutputStream *ost)
 984 {
 985     OutputFile *of = output_files[ost->file_index];
 986     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
 987
 988     if (ost->source_index != ist_index)
 989         return 0;
 990
 991     if (of->start_time && ist->last_dts < of->start_time)
 992         return 0;
 993
 994     return 1;
 995 }
 996
 997 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
 998 {
 999     OutputFile *of = output_files[ost->file_index];
1000     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
1001     AVPacket opkt;
1002
1003     av_init_packet(&opkt);
1004
1005     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1006         !ost->copy_initial_nonkeyframes)
1007         return;
1008
1009     if (of->recording_time != INT64_MAX &&
1010         ist->last_dts >= of->recording_time + of->start_time) {
1011         ost->finished = 1;
1012         return;
1013     }
1014
1015     /* force the input stream PTS */
1016     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1017         audio_size += pkt->size;
1018     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1019         video_size += pkt->size;
1020         ost->sync_opts++;
1021     }
1022
1023     if (pkt->pts != AV_NOPTS_VALUE)
1024         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1025     else
1026         opkt.pts = AV_NOPTS_VALUE;
1027
1028     if (pkt->dts == AV_NOPTS_VALUE)
1029         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
1030     else
1031         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1032     opkt.dts -= ost_tb_start_time;
1033
1034     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1035     opkt.flags    = pkt->flags;
1036
1037     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1038     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1039        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1040        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1041        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1042        ) {
1043         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1044             opkt.destruct = av_destruct_packet;
1045     } else {
1046         opkt.data = pkt->data;
1047         opkt.size = pkt->size;
1048     }
1049
1050     write_frame(of->ctx, &opkt, ost);
1051     ost->st->codec->frame_number++;
1052 }
1053
1054 static void rate_emu_sleep(InputStream *ist)
1055 {
1056     if (input_files[ist->file_index]->rate_emu) {
1057         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
1058         int64_t now = av_gettime() - ist->start;
1059         if (pts > now)
1060             av_usleep(pts - now);
1061     }
1062 }
1063
1064 int guess_input_channel_layout(InputStream *ist)
1065 {
1066     AVCodecContext *dec = ist->st->codec;
1067
1068     if (!dec->channel_layout) {
1069         char layout_name[256];
1070
1071         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1072         if (!dec->channel_layout)
1073             return 0;
1074         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1075                                      dec->channels, dec->channel_layout);
1076         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1077                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1078     }
1079     return 1;
1080 }
1081
1082 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1083 {
1084     AVFrame *decoded_frame;
1085     AVCodecContext *avctx = ist->st->codec;
1086     int i, ret, resample_changed;
1087
1088     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1089         return AVERROR(ENOMEM);
1090     decoded_frame = ist->decoded_frame;
1091
1092     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1093     if (!*got_output || ret < 0) {
1094         if (!pkt->size) {
1095             for (i = 0; i < ist->nb_filters; i++)
1096                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1097         }
1098         return ret;
1099     }
1100
1101     /* if the decoder provides a pts, use it instead of the last packet pts.
1102        the decoder could be delaying output by a packet or more. */
1103     if (decoded_frame->pts != AV_NOPTS_VALUE)
1104         ist->next_dts = decoded_frame->pts;
1105     else if (pkt->pts != AV_NOPTS_VALUE) {
1106         decoded_frame->pts = pkt->pts;
1107         pkt->pts           = AV_NOPTS_VALUE;
1108     }
1109
1110     rate_emu_sleep(ist);
1111
1112     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1113                        ist->resample_channels       != avctx->channels               ||
1114                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1115                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1116     if (resample_changed) {
1117         char layout1[64], layout2[64];
1118
1119         if (!guess_input_channel_layout(ist)) {
1120             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1121                    "layout for Input Stream #%d.%d\n", ist->file_index,
1122                    ist->st->index);
1123             exit(1);
1124         }
1125         decoded_frame->channel_layout = avctx->channel_layout;
1126
1127         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1128                                      ist->resample_channel_layout);
1129         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1130                                      decoded_frame->channel_layout);
1131
1132         av_log(NULL, AV_LOG_INFO,
1133                "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",
1134                ist->file_index, ist->st->index,
1135                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1136                ist->resample_channels, layout1,
1137                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1138                avctx->channels, layout2);
1139
1140         ist->resample_sample_fmt     = decoded_frame->format;
1141         ist->resample_sample_rate    = decoded_frame->sample_rate;
1142         ist->resample_channel_layout = decoded_frame->channel_layout;
1143         ist->resample_channels       = avctx->channels;
1144
1145         for (i = 0; i < nb_filtergraphs; i++)
1146             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1147                 configure_filtergraph(filtergraphs[i]) < 0) {
1148                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1149                 exit(1);
1150             }
1151     }
1152
1153     if (decoded_frame->pts != AV_NOPTS_VALUE)
1154         decoded_frame->pts = av_rescale_q(decoded_frame->pts,
1155                                           ist->st->time_base,
1156                                           (AVRational){1, ist->st->codec->sample_rate});
1157     for (i = 0; i < ist->nb_filters; i++)
1158         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1159
1160     return ret;
1161 }
1162
1163 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1164 {
1165     AVFrame *decoded_frame;
1166     void *buffer_to_free = NULL;
1167     int i, ret = 0, resample_changed;
1168
1169     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1170         return AVERROR(ENOMEM);
1171     decoded_frame = ist->decoded_frame;
1172
1173     ret = avcodec_decode_video2(ist->st->codec,
1174                                 decoded_frame, got_output, pkt);
1175     if (!*got_output || ret < 0) {
1176         if (!pkt->size) {
1177             for (i = 0; i < ist->nb_filters; i++)
1178                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1179         }
1180         return ret;
1181     }
1182
1183     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
1184                                            decoded_frame->pkt_dts);
1185     pkt->size = 0;
1186 #if FF_API_DEINTERLACE
1187     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
1188 #endif
1189
1190     rate_emu_sleep(ist);
1191
1192     if (ist->st->sample_aspect_ratio.num)
1193         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1194
1195     resample_changed = ist->resample_width   != decoded_frame->width  ||
1196                        ist->resample_height  != decoded_frame->height ||
1197                        ist->resample_pix_fmt != decoded_frame->format;
1198     if (resample_changed) {
1199         av_log(NULL, AV_LOG_INFO,
1200                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1201                ist->file_index, ist->st->index,
1202                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1203                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1204
1205         ret = poll_filters();
1206         if (ret < 0 && (ret != AVERROR_EOF && ret != AVERROR(EAGAIN)))
1207             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
1208
1209         ist->resample_width   = decoded_frame->width;
1210         ist->resample_height  = decoded_frame->height;
1211         ist->resample_pix_fmt = decoded_frame->format;
1212
1213         for (i = 0; i < nb_filtergraphs; i++)
1214             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1215                 configure_filtergraph(filtergraphs[i]) < 0) {
1216                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1217                 exit(1);
1218             }
1219     }
1220
1221     for (i = 0; i < ist->nb_filters; i++) {
1222         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
1223             FrameBuffer      *buf = decoded_frame->opaque;
1224             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
1225                                         decoded_frame->data, decoded_frame->linesize,
1226                                         AV_PERM_READ | AV_PERM_PRESERVE,
1227                                         ist->st->codec->width, ist->st->codec->height,
1228                                         ist->st->codec->pix_fmt);
1229
1230             avfilter_copy_frame_props(fb, decoded_frame);
1231             fb->buf->priv           = buf;
1232             fb->buf->free           = filter_release_buffer;
1233
1234             buf->refcount++;
1235             av_buffersrc_buffer(ist->filters[i]->filter, fb);
1236         } else
1237             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1238     }
1239
1240     av_free(buffer_to_free);
1241     return ret;
1242 }
1243
1244 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1245 {
1246     AVSubtitle subtitle;
1247     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1248                                           &subtitle, got_output, pkt);
1249     if (ret < 0)
1250         return ret;
1251     if (!*got_output)
1252         return ret;
1253
1254     rate_emu_sleep(ist);
1255
1256     for (i = 0; i < nb_output_streams; i++) {
1257         OutputStream *ost = output_streams[i];
1258
1259         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1260             continue;
1261
1262         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
1263     }
1264
1265     avsubtitle_free(&subtitle);
1266     return ret;
1267 }
1268
1269 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1270 static int output_packet(InputStream *ist, const AVPacket *pkt)
1271 {
1272     int i;
1273     int got_output;
1274     AVPacket avpkt;
1275
1276     if (ist->next_dts == AV_NOPTS_VALUE)
1277         ist->next_dts = ist->last_dts;
1278
1279     if (pkt == NULL) {
1280         /* EOF handling */
1281         av_init_packet(&avpkt);
1282         avpkt.data = NULL;
1283         avpkt.size = 0;
1284         goto handle_eof;
1285     } else {
1286         avpkt = *pkt;
1287     }
1288
1289     if (pkt->dts != AV_NOPTS_VALUE)
1290         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1291
1292     // while we have more to decode or while the decoder did output something on EOF
1293     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1294         int ret = 0;
1295     handle_eof:
1296
1297         ist->last_dts = ist->next_dts;
1298
1299         if (avpkt.size && avpkt.size != pkt->size) {
1300             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1301                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1302             ist->showed_multi_packet_warning = 1;
1303         }
1304
1305         switch (ist->st->codec->codec_type) {
1306         case AVMEDIA_TYPE_AUDIO:
1307             ret = decode_audio    (ist, &avpkt, &got_output);
1308             break;
1309         case AVMEDIA_TYPE_VIDEO:
1310             ret = decode_video    (ist, &avpkt, &got_output);
1311             if (avpkt.duration)
1312                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1313             else if (ist->st->avg_frame_rate.num)
1314                 ist->next_dts += av_rescale_q(1, av_inv_q(ist->st->avg_frame_rate),
1315                                               AV_TIME_BASE_Q);
1316             else if (ist->st->codec->time_base.num != 0) {
1317                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
1318                                                    ist->st->codec->ticks_per_frame;
1319                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
1320             }
1321             break;
1322         case AVMEDIA_TYPE_SUBTITLE:
1323             ret = transcode_subtitles(ist, &avpkt, &got_output);
1324             break;
1325         default:
1326             return -1;
1327         }
1328
1329         if (ret < 0)
1330             return ret;
1331         // touch data and size only if not EOF
1332         if (pkt) {
1333             avpkt.data += ret;
1334             avpkt.size -= ret;
1335         }
1336         if (!got_output) {
1337             continue;
1338         }
1339     }
1340
1341     /* handle stream copy */
1342     if (!ist->decoding_needed) {
1343         rate_emu_sleep(ist);
1344         ist->last_dts = ist->next_dts;
1345         switch (ist->st->codec->codec_type) {
1346         case AVMEDIA_TYPE_AUDIO:
1347             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1348                              ist->st->codec->sample_rate;
1349             break;
1350         case AVMEDIA_TYPE_VIDEO:
1351             if (ist->st->codec->time_base.num != 0) {
1352                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
1353                 ist->next_dts += ((int64_t)AV_TIME_BASE *
1354                                   ist->st->codec->time_base.num * ticks) /
1355                                   ist->st->codec->time_base.den;
1356             }
1357             break;
1358         }
1359     }
1360     for (i = 0; pkt && i < nb_output_streams; i++) {
1361         OutputStream *ost = output_streams[i];
1362
1363         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1364             continue;
1365
1366         do_streamcopy(ist, ost, pkt);
1367     }
1368
1369     return 0;
1370 }
1371
1372 static void print_sdp(void)
1373 {
1374     char sdp[16384];
1375     int i;
1376     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
1377
1378     if (!avc)
1379         exit(1);
1380     for (i = 0; i < nb_output_files; i++)
1381         avc[i] = output_files[i]->ctx;
1382
1383     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
1384     printf("SDP:\n%s\n", sdp);
1385     fflush(stdout);
1386     av_freep(&avc);
1387 }
1388
1389 static int init_input_stream(int ist_index, char *error, int error_len)
1390 {
1391     int i, ret;
1392     InputStream *ist = input_streams[ist_index];
1393     if (ist->decoding_needed) {
1394         AVCodec *codec = ist->dec;
1395         if (!codec) {
1396             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
1397                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
1398             return AVERROR(EINVAL);
1399         }
1400
1401         /* update requested sample format for the decoder based on the
1402            corresponding encoder sample format */
1403         for (i = 0; i < nb_output_streams; i++) {
1404             OutputStream *ost = output_streams[i];
1405             if (ost->source_index == ist_index) {
1406                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
1407                 break;
1408             }
1409         }
1410
1411         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
1412             ist->st->codec->get_buffer     = codec_get_buffer;
1413             ist->st->codec->release_buffer = codec_release_buffer;
1414             ist->st->codec->opaque         = &ist->buffer_pool;
1415         }
1416
1417         if (!av_dict_get(ist->opts, "threads", NULL, 0))
1418             av_dict_set(&ist->opts, "threads", "auto", 0);
1419         if ((ret = avcodec_open2(ist->st->codec, codec, &ist->opts)) < 0) {
1420             if (ret == AVERROR_EXPERIMENTAL)
1421                 abort_codec_experimental(codec, 0);
1422             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
1423                     ist->file_index, ist->st->index);
1424             return ret;
1425         }
1426         assert_avoptions(ist->opts);
1427     }
1428
1429     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;
1430     ist->next_dts = AV_NOPTS_VALUE;
1431     init_pts_correction(&ist->pts_ctx);
1432     ist->is_start = 1;
1433
1434     return 0;
1435 }
1436
1437 static InputStream *get_input_stream(OutputStream *ost)
1438 {
1439     if (ost->source_index >= 0)
1440         return input_streams[ost->source_index];
1441
1442     if (ost->filter) {
1443         FilterGraph *fg = ost->filter->graph;
1444         int i;
1445
1446         for (i = 0; i < fg->nb_inputs; i++)
1447             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
1448                 return fg->inputs[i]->ist;
1449     }
1450
1451     return NULL;
1452 }
1453
1454 static void parse_forced_key_frames(char *kf, OutputStream *ost,
1455                                     AVCodecContext *avctx)
1456 {
1457     char *p;
1458     int n = 1, i;
1459     int64_t t;
1460
1461     for (p = kf; *p; p++)
1462         if (*p == ',')
1463             n++;
1464     ost->forced_kf_count = n;
1465     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
1466     if (!ost->forced_kf_pts) {
1467         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
1468         exit(1);
1469     }
1470
1471     p = kf;
1472     for (i = 0; i < n; i++) {
1473         char *next = strchr(p, ',');
1474
1475         if (next)
1476             *next++ = 0;
1477
1478         t = parse_time_or_die("force_key_frames", p, 1);
1479         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
1480
1481         p = next;
1482     }
1483 }
1484
1485 static int transcode_init(void)
1486 {
1487     int ret = 0, i, j, k;
1488     AVFormatContext *oc;
1489     AVCodecContext *codec;
1490     OutputStream *ost;
1491     InputStream *ist;
1492     char error[1024];
1493     int want_sdp = 1;
1494
1495     /* init framerate emulation */
1496     for (i = 0; i < nb_input_files; i++) {
1497         InputFile *ifile = input_files[i];
1498         if (ifile->rate_emu)
1499             for (j = 0; j < ifile->nb_streams; j++)
1500                 input_streams[j + ifile->ist_index]->start = av_gettime();
1501     }
1502
1503     /* output stream init */
1504     for (i = 0; i < nb_output_files; i++) {
1505         oc = output_files[i]->ctx;
1506         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
1507             av_dump_format(oc, i, oc->filename, 1);
1508             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
1509             return AVERROR(EINVAL);
1510         }
1511     }
1512
1513     /* init complex filtergraphs */
1514     for (i = 0; i < nb_filtergraphs; i++)
1515         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
1516             return ret;
1517
1518     /* for each output stream, we compute the right encoding parameters */
1519     for (i = 0; i < nb_output_streams; i++) {
1520         AVCodecContext *icodec = NULL;
1521         ost = output_streams[i];
1522         oc  = output_files[ost->file_index]->ctx;
1523         ist = get_input_stream(ost);
1524
1525         if (ost->attachment_filename)
1526             continue;
1527
1528         codec  = ost->st->codec;
1529
1530         if (ist) {
1531             icodec = ist->st->codec;
1532
1533             ost->st->disposition          = ist->st->disposition;
1534             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
1535             codec->chroma_sample_location = icodec->chroma_sample_location;
1536         }
1537
1538         if (ost->stream_copy) {
1539             uint64_t extra_size;
1540
1541             av_assert0(ist && !ost->filter);
1542
1543             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
1544
1545             if (extra_size > INT_MAX) {
1546                 return AVERROR(EINVAL);
1547             }
1548
1549             /* if stream_copy is selected, no need to decode or encode */
1550             codec->codec_id   = icodec->codec_id;
1551             codec->codec_type = icodec->codec_type;
1552
1553             if (!codec->codec_tag) {
1554                 if (!oc->oformat->codec_tag ||
1555                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
1556                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
1557                     codec->codec_tag = icodec->codec_tag;
1558             }
1559
1560             codec->bit_rate       = icodec->bit_rate;
1561             codec->rc_max_rate    = icodec->rc_max_rate;
1562             codec->rc_buffer_size = icodec->rc_buffer_size;
1563             codec->field_order    = icodec->field_order;
1564             codec->extradata      = av_mallocz(extra_size);
1565             if (!codec->extradata) {
1566                 return AVERROR(ENOMEM);
1567             }
1568             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
1569             codec->extradata_size = icodec->extradata_size;
1570             if (!copy_tb) {
1571                 codec->time_base      = icodec->time_base;
1572                 codec->time_base.num *= icodec->ticks_per_frame;
1573                 av_reduce(&codec->time_base.num, &codec->time_base.den,
1574                           codec->time_base.num, codec->time_base.den, INT_MAX);
1575             } else
1576                 codec->time_base = ist->st->time_base;
1577
1578             switch (codec->codec_type) {
1579             case AVMEDIA_TYPE_AUDIO:
1580                 if (audio_volume != 256) {
1581                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
1582                     exit(1);
1583                 }
1584                 codec->channel_layout     = icodec->channel_layout;
1585                 codec->sample_rate        = icodec->sample_rate;
1586                 codec->channels           = icodec->channels;
1587                 codec->frame_size         = icodec->frame_size;
1588                 codec->audio_service_type = icodec->audio_service_type;
1589                 codec->block_align        = icodec->block_align;
1590                 break;
1591             case AVMEDIA_TYPE_VIDEO:
1592                 codec->pix_fmt            = icodec->pix_fmt;
1593                 codec->width              = icodec->width;
1594                 codec->height             = icodec->height;
1595                 codec->has_b_frames       = icodec->has_b_frames;
1596                 if (!codec->sample_aspect_ratio.num) {
1597                     codec->sample_aspect_ratio   =
1598                     ost->st->sample_aspect_ratio =
1599                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
1600                         ist->st->codec->sample_aspect_ratio.num ?
1601                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
1602                 }
1603                 break;
1604             case AVMEDIA_TYPE_SUBTITLE:
1605                 codec->width  = icodec->width;
1606                 codec->height = icodec->height;
1607                 break;
1608             case AVMEDIA_TYPE_DATA:
1609             case AVMEDIA_TYPE_ATTACHMENT:
1610                 break;
1611             default:
1612                 abort();
1613             }
1614         } else {
1615             if (!ost->enc) {
1616                 /* should only happen when a default codec is not present. */
1617                 snprintf(error, sizeof(error), "Automatic encoder selection "
1618                          "failed for output stream #%d:%d. Default encoder for "
1619                          "format %s is probably disabled. Please choose an "
1620                          "encoder manually.\n", ost->file_index, ost->index,
1621                          oc->oformat->name);
1622                 ret = AVERROR(EINVAL);
1623                 goto dump_format;
1624             }
1625
1626             if (ist)
1627                 ist->decoding_needed = 1;
1628             ost->encoding_needed = 1;
1629
1630             /*
1631              * We want CFR output if and only if one of those is true:
1632              * 1) user specified output framerate with -r
1633              * 2) user specified -vsync cfr
1634              * 3) output format is CFR and the user didn't force vsync to
1635              *    something else than CFR
1636              *
1637              * in such a case, set ost->frame_rate
1638              */
1639             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1640                 !ost->frame_rate.num && ist &&
1641                 (video_sync_method ==  VSYNC_CFR ||
1642                  (video_sync_method ==  VSYNC_AUTO &&
1643                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
1644                 ost->frame_rate = ist->framerate.num ? ist->framerate :
1645                                   ist->st->avg_frame_rate.num ?
1646                                   ist->st->avg_frame_rate :
1647                                   (AVRational){25, 1};
1648
1649                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
1650                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
1651                     ost->frame_rate = ost->enc->supported_framerates[idx];
1652                 }
1653             }
1654
1655             if (!ost->filter &&
1656                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
1657                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
1658                     FilterGraph *fg;
1659                     fg = init_simple_filtergraph(ist, ost);
1660                     if (configure_filtergraph(fg)) {
1661                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
1662                         exit(1);
1663                     }
1664             }
1665
1666             switch (codec->codec_type) {
1667             case AVMEDIA_TYPE_AUDIO:
1668                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
1669                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
1670                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
1671                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
1672                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
1673                 break;
1674             case AVMEDIA_TYPE_VIDEO:
1675                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
1676
1677                 codec->width  = ost->filter->filter->inputs[0]->w;
1678                 codec->height = ost->filter->filter->inputs[0]->h;
1679                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
1680                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
1681                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
1682                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
1683                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
1684
1685                 if (icodec &&
1686                     (codec->width   != icodec->width  ||
1687                      codec->height  != icodec->height ||
1688                      codec->pix_fmt != icodec->pix_fmt)) {
1689                     codec->bits_per_raw_sample = 0;
1690                 }
1691
1692                 if (ost->forced_keyframes)
1693                     parse_forced_key_frames(ost->forced_keyframes, ost,
1694                                             ost->st->codec);
1695                 break;
1696             case AVMEDIA_TYPE_SUBTITLE:
1697                 codec->time_base = (AVRational){1, 1000};
1698                 break;
1699             default:
1700                 abort();
1701                 break;
1702             }
1703             /* two pass mode */
1704             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
1705                 char logfilename[1024];
1706                 FILE *f;
1707
1708                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
1709                          ost->logfile_prefix ? ost->logfile_prefix :
1710                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
1711                          i);
1712                 if (!strcmp(ost->enc->name, "libx264")) {
1713                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
1714                 } else {
1715                     if (codec->flags & CODEC_FLAG_PASS1) {
1716                         f = fopen(logfilename, "wb");
1717                         if (!f) {
1718                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
1719                                    logfilename, strerror(errno));
1720                             exit(1);
1721                         }
1722                         ost->logfile = f;
1723                     } else {
1724                         char  *logbuffer;
1725                         size_t logbuffer_size;
1726                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
1727                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
1728                                    logfilename);
1729                             exit(1);
1730                         }
1731                         codec->stats_in = logbuffer;
1732                     }
1733                 }
1734             }
1735         }
1736     }
1737
1738     /* open each encoder */
1739     for (i = 0; i < nb_output_streams; i++) {
1740         ost = output_streams[i];
1741         if (ost->encoding_needed) {
1742             AVCodec      *codec = ost->enc;
1743             AVCodecContext *dec = NULL;
1744
1745             if ((ist = get_input_stream(ost)))
1746                 dec = ist->st->codec;
1747             if (dec && dec->subtitle_header) {
1748                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
1749                 if (!ost->st->codec->subtitle_header) {
1750                     ret = AVERROR(ENOMEM);
1751                     goto dump_format;
1752                 }
1753                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
1754                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
1755             }
1756             if (!av_dict_get(ost->opts, "threads", NULL, 0))
1757                 av_dict_set(&ost->opts, "threads", "auto", 0);
1758             if ((ret = avcodec_open2(ost->st->codec, codec, &ost->opts)) < 0) {
1759                 if (ret == AVERROR_EXPERIMENTAL)
1760                     abort_codec_experimental(codec, 1);
1761                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
1762                         ost->file_index, ost->index);
1763                 goto dump_format;
1764             }
1765             assert_avoptions(ost->opts);
1766             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
1767                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
1768                                              "It takes bits/s as argument, not kbits/s\n");
1769             extra_size += ost->st->codec->extradata_size;
1770
1771             if (ost->st->codec->me_threshold)
1772                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
1773         } else {
1774             av_opt_set_dict(ost->st->codec, &ost->opts);
1775         }
1776     }
1777
1778     /* init input streams */
1779     for (i = 0; i < nb_input_streams; i++)
1780         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
1781             goto dump_format;
1782
1783     /* discard unused programs */
1784     for (i = 0; i < nb_input_files; i++) {
1785         InputFile *ifile = input_files[i];
1786         for (j = 0; j < ifile->ctx->nb_programs; j++) {
1787             AVProgram *p = ifile->ctx->programs[j];
1788             int discard  = AVDISCARD_ALL;
1789
1790             for (k = 0; k < p->nb_stream_indexes; k++)
1791                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
1792                     discard = AVDISCARD_DEFAULT;
1793                     break;
1794                 }
1795             p->discard = discard;
1796         }
1797     }
1798
1799     /* open files and write file headers */
1800     for (i = 0; i < nb_output_files; i++) {
1801         oc = output_files[i]->ctx;
1802         oc->interrupt_callback = int_cb;
1803         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
1804             char errbuf[128];
1805             const char *errbuf_ptr = errbuf;
1806             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
1807                 errbuf_ptr = strerror(AVUNERROR(ret));
1808             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
1809             ret = AVERROR(EINVAL);
1810             goto dump_format;
1811         }
1812         assert_avoptions(output_files[i]->opts);
1813         if (strcmp(oc->oformat->name, "rtp")) {
1814             want_sdp = 0;
1815         }
1816     }
1817
1818  dump_format:
1819     /* dump the file output parameters - cannot be done before in case
1820        of stream copy */
1821     for (i = 0; i < nb_output_files; i++) {
1822         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
1823     }
1824
1825     /* dump the stream mapping */
1826     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
1827     for (i = 0; i < nb_input_streams; i++) {
1828         ist = input_streams[i];
1829
1830         for (j = 0; j < ist->nb_filters; j++) {
1831             if (ist->filters[j]->graph->graph_desc) {
1832                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
1833                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
1834                        ist->filters[j]->name);
1835                 if (nb_filtergraphs > 1)
1836                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
1837                 av_log(NULL, AV_LOG_INFO, "\n");
1838             }
1839         }
1840     }
1841
1842     for (i = 0; i < nb_output_streams; i++) {
1843         ost = output_streams[i];
1844
1845         if (ost->attachment_filename) {
1846             /* an attached file */
1847             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
1848                    ost->attachment_filename, ost->file_index, ost->index);
1849             continue;
1850         }
1851
1852         if (ost->filter && ost->filter->graph->graph_desc) {
1853             /* output from a complex graph */
1854             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
1855             if (nb_filtergraphs > 1)
1856                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
1857
1858             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
1859                    ost->index, ost->enc ? ost->enc->name : "?");
1860             continue;
1861         }
1862
1863         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
1864                input_streams[ost->source_index]->file_index,
1865                input_streams[ost->source_index]->st->index,
1866                ost->file_index,
1867                ost->index);
1868         if (ost->sync_ist != input_streams[ost->source_index])
1869             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
1870                    ost->sync_ist->file_index,
1871                    ost->sync_ist->st->index);
1872         if (ost->stream_copy)
1873             av_log(NULL, AV_LOG_INFO, " (copy)");
1874         else
1875             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
1876                    input_streams[ost->source_index]->dec->name : "?",
1877                    ost->enc ? ost->enc->name : "?");
1878         av_log(NULL, AV_LOG_INFO, "\n");
1879     }
1880
1881     if (ret) {
1882         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
1883         return ret;
1884     }
1885
1886     if (want_sdp) {
1887         print_sdp();
1888     }
1889
1890     return 0;
1891 }
1892
1893 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
1894 static int need_output(void)
1895 {
1896     int i;
1897
1898     for (i = 0; i < nb_output_streams; i++) {
1899         OutputStream *ost    = output_streams[i];
1900         OutputFile *of       = output_files[ost->file_index];
1901         AVFormatContext *os  = output_files[ost->file_index]->ctx;
1902
1903         if (ost->finished ||
1904             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
1905             continue;
1906         if (ost->frame_number >= ost->max_frames) {
1907             int j;
1908             for (j = 0; j < of->ctx->nb_streams; j++)
1909                 output_streams[of->ost_index + j]->finished = 1;
1910             continue;
1911         }
1912
1913         return 1;
1914     }
1915
1916     return 0;
1917 }
1918
1919 static InputFile *select_input_file(void)
1920 {
1921     InputFile *ifile = NULL;
1922     int64_t ipts_min = INT64_MAX;
1923     int i;
1924
1925     for (i = 0; i < nb_input_streams; i++) {
1926         InputStream *ist = input_streams[i];
1927         int64_t ipts     = ist->last_dts;
1928
1929         if (ist->discard || input_files[ist->file_index]->eagain)
1930             continue;
1931         if (!input_files[ist->file_index]->eof_reached) {
1932             if (ipts < ipts_min) {
1933                 ipts_min = ipts;
1934                 ifile    = input_files[ist->file_index];
1935             }
1936         }
1937     }
1938
1939     return ifile;
1940 }
1941
1942 #if HAVE_PTHREADS
1943 static void *input_thread(void *arg)
1944 {
1945     InputFile *f = arg;
1946     int ret = 0;
1947
1948     while (!transcoding_finished && ret >= 0) {
1949         AVPacket pkt;
1950         ret = av_read_frame(f->ctx, &pkt);
1951
1952         if (ret == AVERROR(EAGAIN)) {
1953             av_usleep(10000);
1954             ret = 0;
1955             continue;
1956         } else if (ret < 0)
1957             break;
1958
1959         pthread_mutex_lock(&f->fifo_lock);
1960         while (!av_fifo_space(f->fifo))
1961             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
1962
1963         av_dup_packet(&pkt);
1964         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
1965
1966         pthread_mutex_unlock(&f->fifo_lock);
1967     }
1968
1969     f->finished = 1;
1970     return NULL;
1971 }
1972
1973 static void free_input_threads(void)
1974 {
1975     int i;
1976
1977     if (nb_input_files == 1)
1978         return;
1979
1980     transcoding_finished = 1;
1981
1982     for (i = 0; i < nb_input_files; i++) {
1983         InputFile *f = input_files[i];
1984         AVPacket pkt;
1985
1986         if (!f->fifo || f->joined)
1987             continue;
1988
1989         pthread_mutex_lock(&f->fifo_lock);
1990         while (av_fifo_size(f->fifo)) {
1991             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
1992             av_free_packet(&pkt);
1993         }
1994         pthread_cond_signal(&f->fifo_cond);
1995         pthread_mutex_unlock(&f->fifo_lock);
1996
1997         pthread_join(f->thread, NULL);
1998         f->joined = 1;
1999
2000         while (av_fifo_size(f->fifo)) {
2001             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2002             av_free_packet(&pkt);
2003         }
2004         av_fifo_free(f->fifo);
2005     }
2006 }
2007
2008 static int init_input_threads(void)
2009 {
2010     int i, ret;
2011
2012     if (nb_input_files == 1)
2013         return 0;
2014
2015     for (i = 0; i < nb_input_files; i++) {
2016         InputFile *f = input_files[i];
2017
2018         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2019             return AVERROR(ENOMEM);
2020
2021         pthread_mutex_init(&f->fifo_lock, NULL);
2022         pthread_cond_init (&f->fifo_cond, NULL);
2023
2024         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2025             return AVERROR(ret);
2026     }
2027     return 0;
2028 }
2029
2030 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2031 {
2032     int ret = 0;
2033
2034     pthread_mutex_lock(&f->fifo_lock);
2035
2036     if (av_fifo_size(f->fifo)) {
2037         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2038         pthread_cond_signal(&f->fifo_cond);
2039     } else {
2040         if (f->finished)
2041             ret = AVERROR_EOF;
2042         else
2043             ret = AVERROR(EAGAIN);
2044     }
2045
2046     pthread_mutex_unlock(&f->fifo_lock);
2047
2048     return ret;
2049 }
2050 #endif
2051
2052 static int get_input_packet(InputFile *f, AVPacket *pkt)
2053 {
2054 #if HAVE_PTHREADS
2055     if (nb_input_files > 1)
2056         return get_input_packet_mt(f, pkt);
2057 #endif
2058     return av_read_frame(f->ctx, pkt);
2059 }
2060
2061 static int got_eagain(void)
2062 {
2063     int i;
2064     for (i = 0; i < nb_input_files; i++)
2065         if (input_files[i]->eagain)
2066             return 1;
2067     return 0;
2068 }
2069
2070 static void reset_eagain(void)
2071 {
2072     int i;
2073     for (i = 0; i < nb_input_files; i++)
2074         input_files[i]->eagain = 0;
2075 }
2076
2077 /*
2078  * Read one packet from an input file and send it for
2079  * - decoding -> lavfi (audio/video)
2080  * - decoding -> encoding -> muxing (subtitles)
2081  * - muxing (streamcopy)
2082  *
2083  * Return
2084  * - 0 -- one packet was read and processed
2085  * - AVERROR(EAGAIN) -- no packets were available for selected file,
2086  *   this function should be called again
2087  * - AVERROR_EOF -- this function should not be called again
2088  */
2089 static int process_input(void)
2090 {
2091     InputFile *ifile;
2092     AVFormatContext *is;
2093     InputStream *ist;
2094     AVPacket pkt;
2095     int ret, i, j;
2096
2097     /* select the stream that we must read now */
2098     ifile = select_input_file();
2099     /* if none, if is finished */
2100     if (!ifile) {
2101         if (got_eagain()) {
2102             reset_eagain();
2103             av_usleep(10000);
2104             return AVERROR(EAGAIN);
2105         }
2106         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from.\n");
2107         return AVERROR_EOF;
2108     }
2109
2110     is  = ifile->ctx;
2111     ret = get_input_packet(ifile, &pkt);
2112
2113     if (ret == AVERROR(EAGAIN)) {
2114         ifile->eagain = 1;
2115         return ret;
2116     }
2117     if (ret < 0) {
2118         if (ret != AVERROR_EOF) {
2119             print_error(is->filename, ret);
2120             if (exit_on_error)
2121                 exit(1);
2122         }
2123         ifile->eof_reached = 1;
2124
2125         for (i = 0; i < ifile->nb_streams; i++) {
2126             ist = input_streams[ifile->ist_index + i];
2127             if (ist->decoding_needed)
2128                 output_packet(ist, NULL);
2129
2130             /* mark all outputs that don't go through lavfi as finished */
2131             for (j = 0; j < nb_output_streams; j++) {
2132                 OutputStream *ost = output_streams[j];
2133
2134                 if (ost->source_index == ifile->ist_index + i &&
2135                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
2136                     ost->finished= 1;
2137             }
2138         }
2139
2140         return AVERROR(EAGAIN);
2141     }
2142
2143     reset_eagain();
2144
2145     if (do_pkt_dump) {
2146         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2147                          is->streams[pkt.stream_index]);
2148     }
2149     /* the following test is needed in case new streams appear
2150        dynamically in stream : we ignore them */
2151     if (pkt.stream_index >= ifile->nb_streams)
2152         goto discard_packet;
2153
2154     ist = input_streams[ifile->ist_index + pkt.stream_index];
2155     if (ist->discard)
2156         goto discard_packet;
2157
2158     if (pkt.dts != AV_NOPTS_VALUE)
2159         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2160     if (pkt.pts != AV_NOPTS_VALUE)
2161         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2162
2163     if (pkt.pts != AV_NOPTS_VALUE)
2164         pkt.pts *= ist->ts_scale;
2165     if (pkt.dts != AV_NOPTS_VALUE)
2166         pkt.dts *= ist->ts_scale;
2167
2168     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
2169         (is->iformat->flags & AVFMT_TS_DISCONT)) {
2170         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2171         int64_t delta   = pkt_dts - ist->next_dts;
2172
2173         if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
2174             ifile->ts_offset -= delta;
2175             av_log(NULL, AV_LOG_DEBUG,
2176                    "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2177                    delta, ifile->ts_offset);
2178             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2179             if (pkt.pts != AV_NOPTS_VALUE)
2180                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2181         }
2182     }
2183
2184     ret = output_packet(ist, &pkt);
2185     if (ret < 0) {
2186         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
2187                ist->file_index, ist->st->index);
2188         if (exit_on_error)
2189             exit(1);
2190     }
2191
2192 discard_packet:
2193     av_free_packet(&pkt);
2194
2195     return 0;
2196 }
2197
2198 /*
2199  * The following code is the main loop of the file converter
2200  */
2201 static int transcode(void)
2202 {
2203     int ret, i, need_input = 1;
2204     AVFormatContext *os;
2205     OutputStream *ost;
2206     InputStream *ist;
2207     int64_t timer_start;
2208
2209     ret = transcode_init();
2210     if (ret < 0)
2211         goto fail;
2212
2213     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2214     term_init();
2215
2216     timer_start = av_gettime();
2217
2218 #if HAVE_PTHREADS
2219     if ((ret = init_input_threads()) < 0)
2220         goto fail;
2221 #endif
2222
2223     while (!received_sigterm) {
2224         /* check if there's any stream where output is still needed */
2225         if (!need_output()) {
2226             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2227             break;
2228         }
2229
2230         /* read and process one input packet if needed */
2231         if (need_input) {
2232             ret = process_input();
2233             if (ret == AVERROR_EOF)
2234                 need_input = 0;
2235         }
2236
2237         ret = poll_filters();
2238         if (ret < 0) {
2239             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
2240                 continue;
2241
2242             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
2243             break;
2244         }
2245
2246         /* dump report by using the output first video and audio streams */
2247         print_report(0, timer_start);
2248     }
2249 #if HAVE_PTHREADS
2250     free_input_threads();
2251 #endif
2252
2253     /* at the end of stream, we must flush the decoder buffers */
2254     for (i = 0; i < nb_input_streams; i++) {
2255         ist = input_streams[i];
2256         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
2257             output_packet(ist, NULL);
2258         }
2259     }
2260     poll_filters();
2261     flush_encoders();
2262
2263     term_exit();
2264
2265     /* write the trailer if needed and close file */
2266     for (i = 0; i < nb_output_files; i++) {
2267         os = output_files[i]->ctx;
2268         av_write_trailer(os);
2269     }
2270
2271     /* dump report by using the first video and audio streams */
2272     print_report(1, timer_start);
2273
2274     /* close each encoder */
2275     for (i = 0; i < nb_output_streams; i++) {
2276         ost = output_streams[i];
2277         if (ost->encoding_needed) {
2278             av_freep(&ost->st->codec->stats_in);
2279             avcodec_close(ost->st->codec);
2280         }
2281     }
2282
2283     /* close each decoder */
2284     for (i = 0; i < nb_input_streams; i++) {
2285         ist = input_streams[i];
2286         if (ist->decoding_needed) {
2287             avcodec_close(ist->st->codec);
2288         }
2289     }
2290
2291     /* finished ! */
2292     ret = 0;
2293
2294  fail:
2295 #if HAVE_PTHREADS
2296     free_input_threads();
2297 #endif
2298
2299     if (output_streams) {
2300         for (i = 0; i < nb_output_streams; i++) {
2301             ost = output_streams[i];
2302             if (ost) {
2303                 if (ost->stream_copy)
2304                     av_freep(&ost->st->codec->extradata);
2305                 if (ost->logfile) {
2306                     fclose(ost->logfile);
2307                     ost->logfile = NULL;
2308                 }
2309                 av_freep(&ost->st->codec->subtitle_header);
2310                 av_free(ost->forced_kf_pts);
2311                 av_dict_free(&ost->opts);
2312                 av_dict_free(&ost->resample_opts);
2313             }
2314         }
2315     }
2316     return ret;
2317 }
2318
2319 static int64_t getutime(void)
2320 {
2321 #if HAVE_GETRUSAGE
2322     struct rusage rusage;
2323
2324     getrusage(RUSAGE_SELF, &rusage);
2325     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
2326 #elif HAVE_GETPROCESSTIMES
2327     HANDLE proc;
2328     FILETIME c, e, k, u;
2329     proc = GetCurrentProcess();
2330     GetProcessTimes(proc, &c, &e, &k, &u);
2331     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
2332 #else
2333     return av_gettime();
2334 #endif
2335 }
2336
2337 static int64_t getmaxrss(void)
2338 {
2339 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
2340     struct rusage rusage;
2341     getrusage(RUSAGE_SELF, &rusage);
2342     return (int64_t)rusage.ru_maxrss * 1024;
2343 #elif HAVE_GETPROCESSMEMORYINFO
2344     HANDLE proc;
2345     PROCESS_MEMORY_COUNTERS memcounters;
2346     proc = GetCurrentProcess();
2347     memcounters.cb = sizeof(memcounters);
2348     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
2349     return memcounters.PeakPagefileUsage;
2350 #else
2351     return 0;
2352 #endif
2353 }
2354
2355 int main(int argc, char **argv)
2356 {
2357     int ret;
2358     int64_t ti;
2359
2360     atexit(exit_program);
2361
2362     av_log_set_flags(AV_LOG_SKIP_REPEATED);
2363     parse_loglevel(argc, argv, options);
2364
2365     avcodec_register_all();
2366 #if CONFIG_AVDEVICE
2367     avdevice_register_all();
2368 #endif
2369     avfilter_register_all();
2370     av_register_all();
2371     avformat_network_init();
2372
2373     show_banner();
2374
2375     /* parse options and open all input/output files */
2376     ret = avconv_parse_options(argc, argv);
2377     if (ret < 0)
2378         exit(1);
2379
2380     if (nb_output_files <= 0 && nb_input_files == 0) {
2381         show_usage();
2382         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
2383         exit(1);
2384     }
2385
2386     /* file converter / grab */
2387     if (nb_output_files <= 0) {
2388         fprintf(stderr, "At least one output file must be specified\n");
2389         exit(1);
2390     }
2391
2392     ti = getutime();
2393     if (transcode() < 0)
2394         exit(1);
2395     ti = getutime() - ti;
2396     if (do_benchmark) {
2397         int maxrss = getmaxrss() / 1024;
2398         printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
2399     }
2400
2401     exit(0);
2402     return 0;
2403 }