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