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(OutputStream *ost, int frame_size)
 625 {
 626     AVCodecContext *enc;
 627     int frame_number;
 628     double ti1, bitrate, avg_bitrate;
 629
 630     /* this is executed just the first time do_video_stats is called */
 631     if (!vstats_file) {
 632         vstats_file = fopen(vstats_filename, "w");
 633         if (!vstats_file) {
 634             perror("fopen");
 635             exit(1);
 636         }
 637     }
 638
 639     enc = ost->st->codec;
 640     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
 641         frame_number = ost->frame_number;
 642         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
 643         if (enc->flags&CODEC_FLAG_PSNR)
 644             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
 645
 646         fprintf(vstats_file,"f_size= %6d ", frame_size);
 647         /* compute pts value */
 648         ti1 = ost->sync_opts * av_q2d(enc->time_base);
 649         if (ti1 < 0.01)
 650             ti1 = 0.01;
 651
 652         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
 653         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
 654         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
 655                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
 656         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
 657     }
 658 }
 659
 660 /*
 661  * Read one frame for lavfi output for ost and encode it.
 662  */
 663 static int poll_filter(OutputStream *ost)
 664 {
 665     OutputFile    *of = output_files[ost->file_index];
 666     AVFilterBufferRef *picref;
 667     AVFrame *filtered_frame = NULL;
 668     int frame_size, ret;
 669
 670     if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
 671         return AVERROR(ENOMEM);
 672     } else
 673         avcodec_get_frame_defaults(ost->filtered_frame);
 674     filtered_frame = ost->filtered_frame;
 675
 676     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
 677         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
 678         ret = av_buffersink_read_samples(ost->filter->filter, &picref,
 679                                          ost->st->codec->frame_size);
 680     else
 681         ret = av_buffersink_read(ost->filter->filter, &picref);
 682
 683     if (ret < 0)
 684         return ret;
 685
 686     avfilter_copy_buf_props(filtered_frame, picref);
 687     if (picref->pts != AV_NOPTS_VALUE) {
 688         filtered_frame->pts = av_rescale_q(picref->pts,
 689                                            ost->filter->filter->inputs[0]->time_base,
 690                                            ost->st->codec->time_base) -
 691                               av_rescale_q(of->start_time,
 692                                            AV_TIME_BASE_Q,
 693                                            ost->st->codec->time_base);
 694
 695         if (of->start_time && filtered_frame->pts < 0) {
 696             avfilter_unref_buffer(picref);
 697             return 0;
 698         }
 699     }
 700
 701     switch (ost->filter->filter->inputs[0]->type) {
 702     case AVMEDIA_TYPE_VIDEO:
 703         if (!ost->frame_aspect_ratio)
 704             ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
 705
 706         do_video_out(of->ctx, ost, filtered_frame, &frame_size);
 707         if (vstats_filename && frame_size)
 708             do_video_stats(ost, frame_size);
 709         break;
 710     case AVMEDIA_TYPE_AUDIO:
 711         do_audio_out(of->ctx, ost, filtered_frame);
 712         break;
 713     default:
 714         // TODO support subtitle filters
 715         av_assert0(0);
 716     }
 717
 718     avfilter_unref_buffer(picref);
 719
 720     return 0;
 721 }
 722
 723 /*
 724  * Read as many frames from possible from lavfi and encode them.
 725  *
 726  * Always read from the active stream with the lowest timestamp. If no frames
 727  * are available for it then return EAGAIN and wait for more input. This way we
 728  * can use lavfi sources that generate unlimited amount of frames without memory
 729  * usage exploding.
 730  */
 731 static int poll_filters(void)
 732 {
 733     int i, j, ret = 0;
 734
 735     while (ret >= 0 && !received_sigterm) {
 736         OutputStream *ost = NULL;
 737         int64_t min_pts = INT64_MAX;
 738
 739         /* choose output stream with the lowest timestamp */
 740         for (i = 0; i < nb_output_streams; i++) {
 741             int64_t pts = output_streams[i]->sync_opts;
 742
 743             if (!output_streams[i]->filter || output_streams[i]->finished)
 744                 continue;
 745
 746             pts = av_rescale_q(pts, output_streams[i]->st->codec->time_base,
 747                                AV_TIME_BASE_Q);
 748             if (pts < min_pts) {
 749                 min_pts = pts;
 750                 ost = output_streams[i];
 751             }
 752         }
 753
 754         if (!ost)
 755             break;
 756
 757         ret = poll_filter(ost);
 758
 759         if (ret == AVERROR_EOF) {
 760             OutputFile *of = output_files[ost->file_index];
 761
 762             ost->finished = 1;
 763
 764             if (of->shortest) {
 765                 for (j = 0; j < of->ctx->nb_streams; j++)
 766                     output_streams[of->ost_index + j]->finished = 1;
 767             }
 768
 769             ret = 0;
 770         } else if (ret == AVERROR(EAGAIN))
 771             return 0;
 772     }
 773
 774     return ret;
 775 }
 776
 777 static void print_report(int is_last_report, int64_t timer_start)
 778 {
 779     char buf[1024];
 780     OutputStream *ost;
 781     AVFormatContext *oc;
 782     int64_t total_size;
 783     AVCodecContext *enc;
 784     int frame_number, vid, i;
 785     double bitrate, ti1, pts;
 786     static int64_t last_time = -1;
 787     static int qp_histogram[52];
 788
 789     if (!print_stats && !is_last_report)
 790         return;
 791
 792     if (!is_last_report) {
 793         int64_t cur_time;
 794         /* display the report every 0.5 seconds */
 795         cur_time = av_gettime();
 796         if (last_time == -1) {
 797             last_time = cur_time;
 798             return;
 799         }
 800         if ((cur_time - last_time) < 500000)
 801             return;
 802         last_time = cur_time;
 803     }
 804
 805
 806     oc = output_files[0]->ctx;
 807
 808     total_size = avio_size(oc->pb);
 809     if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
 810         total_size = avio_tell(oc->pb);
 811     if (total_size < 0) {
 812         char errbuf[128];
 813         av_strerror(total_size, errbuf, sizeof(errbuf));
 814         av_log(NULL, AV_LOG_VERBOSE, "Bitrate not available, "
 815                "avio_tell() failed: %s\n", errbuf);
 816         total_size = 0;
 817     }
 818
 819     buf[0] = '\0';
 820     ti1 = 1e10;
 821     vid = 0;
 822     for (i = 0; i < nb_output_streams; i++) {
 823         float q = -1;
 824         ost = output_streams[i];
 825         enc = ost->st->codec;
 826         if (!ost->stream_copy && enc->coded_frame)
 827             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
 828         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
 829             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
 830         }
 831         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
 832             float t = (av_gettime() - timer_start) / 1000000.0;
 833
 834             frame_number = ost->frame_number;
 835             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
 836                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
 837             if (is_last_report)
 838                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
 839             if (qp_hist) {
 840                 int j;
 841                 int qp = lrintf(q);
 842                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
 843                     qp_histogram[qp]++;
 844                 for (j = 0; j < 32; j++)
 845                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
 846             }
 847             if (enc->flags&CODEC_FLAG_PSNR) {
 848                 int j;
 849                 double error, error_sum = 0;
 850                 double scale, scale_sum = 0;
 851                 char type[3] = { 'Y','U','V' };
 852                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
 853                 for (j = 0; j < 3; j++) {
 854                     if (is_last_report) {
 855                         error = enc->error[j];
 856                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
 857                     } else {
 858                         error = enc->coded_frame->error[j];
 859                         scale = enc->width * enc->height * 255.0 * 255.0;
 860                     }
 861                     if (j)
 862                         scale /= 4;
 863                     error_sum += error;
 864                     scale_sum += scale;
 865                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
 866                 }
 867                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
 868             }
 869             vid = 1;
 870         }
 871         /* compute min output value */
 872         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
 873         if ((pts < ti1) && (pts > 0))
 874             ti1 = pts;
 875     }
 876     if (ti1 < 0.01)
 877         ti1 = 0.01;
 878
 879     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
 880
 881     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 882             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
 883             (double)total_size / 1024, ti1, bitrate);
 884
 885     if (nb_frames_dup || nb_frames_drop)
 886         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
 887                 nb_frames_dup, nb_frames_drop);
 888
 889     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
 890
 891     fflush(stderr);
 892
 893     if (is_last_report) {
 894         int64_t raw= audio_size + video_size + extra_size;
 895         av_log(NULL, AV_LOG_INFO, "\n");
 896         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
 897                video_size / 1024.0,
 898                audio_size / 1024.0,
 899                extra_size / 1024.0,
 900                100.0 * (total_size - raw) / raw
 901         );
 902     }
 903 }
 904
 905 static void flush_encoders(void)
 906 {
 907     int i, ret;
 908
 909     for (i = 0; i < nb_output_streams; i++) {
 910         OutputStream   *ost = output_streams[i];
 911         AVCodecContext *enc = ost->st->codec;
 912         AVFormatContext *os = output_files[ost->file_index]->ctx;
 913         int stop_encoding = 0;
 914
 915         if (!ost->encoding_needed)
 916             continue;
 917
 918         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
 919             continue;
 920         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
 921             continue;
 922
 923         for (;;) {
 924             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
 925             const char *desc;
 926             int64_t *size;
 927
 928             switch (ost->st->codec->codec_type) {
 929             case AVMEDIA_TYPE_AUDIO:
 930                 encode = avcodec_encode_audio2;
 931                 desc   = "Audio";
 932                 size   = &audio_size;
 933                 break;
 934             case AVMEDIA_TYPE_VIDEO:
 935                 encode = avcodec_encode_video2;
 936                 desc   = "Video";
 937                 size   = &video_size;
 938                 break;
 939             default:
 940                 stop_encoding = 1;
 941             }
 942
 943             if (encode) {
 944                 AVPacket pkt;
 945                 int got_packet;
 946                 av_init_packet(&pkt);
 947                 pkt.data = NULL;
 948                 pkt.size = 0;
 949
 950                 ret = encode(enc, &pkt, NULL, &got_packet);
 951                 if (ret < 0) {
 952                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
 953                     exit(1);
 954                 }
 955                 *size += ret;
 956                 if (ost->logfile && enc->stats_out) {
 957                     fprintf(ost->logfile, "%s", enc->stats_out);
 958                 }
 959                 if (!got_packet) {
 960                     stop_encoding = 1;
 961                     break;
 962                 }
 963                 if (pkt.pts != AV_NOPTS_VALUE)
 964                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
 965                 if (pkt.dts != AV_NOPTS_VALUE)
 966                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
 967                 write_frame(os, &pkt, ost);
 968             }
 969
 970             if (stop_encoding)
 971                 break;
 972         }
 973     }
 974 }
 975
 976 /*
 977  * Check whether a packet from ist should be written into ost at this time
 978  */
 979 static int check_output_constraints(InputStream *ist, OutputStream *ost)
 980 {
 981     OutputFile *of = output_files[ost->file_index];
 982     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
 983
 984     if (ost->source_index != ist_index)
 985         return 0;
 986
 987     if (of->start_time && ist->last_dts < of->start_time)
 988         return 0;
 989
 990     return 1;
 991 }
 992
 993 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
 994 {
 995     OutputFile *of = output_files[ost->file_index];
 996     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
 997     AVPacket opkt;
 998
 999     av_init_packet(&opkt);
1000
1001     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1002         !ost->copy_initial_nonkeyframes)
1003         return;
1004
1005     if (of->recording_time != INT64_MAX &&
1006         ist->last_dts >= of->recording_time + of->start_time) {
1007         ost->finished = 1;
1008         return;
1009     }
1010
1011     /* force the input stream PTS */
1012     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1013         audio_size += pkt->size;
1014     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1015         video_size += pkt->size;
1016         ost->sync_opts++;
1017     }
1018
1019     if (pkt->pts != AV_NOPTS_VALUE)
1020         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1021     else
1022         opkt.pts = AV_NOPTS_VALUE;
1023
1024     if (pkt->dts == AV_NOPTS_VALUE)
1025         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
1026     else
1027         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1028     opkt.dts -= ost_tb_start_time;
1029
1030     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1031     opkt.flags    = pkt->flags;
1032
1033     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1034     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1035        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1036        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1037        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1038        ) {
1039         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1040             opkt.destruct = av_destruct_packet;
1041     } else {
1042         opkt.data = pkt->data;
1043         opkt.size = pkt->size;
1044     }
1045
1046     write_frame(of->ctx, &opkt, ost);
1047     ost->st->codec->frame_number++;
1048 }
1049
1050 static void rate_emu_sleep(InputStream *ist)
1051 {
1052     if (input_files[ist->file_index]->rate_emu) {
1053         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
1054         int64_t now = av_gettime() - ist->start;
1055         if (pts > now)
1056             av_usleep(pts - now);
1057     }
1058 }
1059
1060 int guess_input_channel_layout(InputStream *ist)
1061 {
1062     AVCodecContext *dec = ist->st->codec;
1063
1064     if (!dec->channel_layout) {
1065         char layout_name[256];
1066
1067         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1068         if (!dec->channel_layout)
1069             return 0;
1070         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1071                                      dec->channels, dec->channel_layout);
1072         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1073                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1074     }
1075     return 1;
1076 }
1077
1078 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1079 {
1080     AVFrame *decoded_frame;
1081     AVCodecContext *avctx = ist->st->codec;
1082     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
1083     int i, ret, resample_changed;
1084
1085     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1086         return AVERROR(ENOMEM);
1087     decoded_frame = ist->decoded_frame;
1088
1089     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1090     if (!*got_output || ret < 0) {
1091         if (!pkt->size) {
1092             for (i = 0; i < ist->nb_filters; i++)
1093                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1094         }
1095         return ret;
1096     }
1097
1098     /* if the decoder provides a pts, use it instead of the last packet pts.
1099        the decoder could be delaying output by a packet or more. */
1100     if (decoded_frame->pts != AV_NOPTS_VALUE)
1101         ist->next_dts = decoded_frame->pts;
1102     else if (pkt->pts != AV_NOPTS_VALUE) {
1103         decoded_frame->pts = pkt->pts;
1104         pkt->pts           = AV_NOPTS_VALUE;
1105     }
1106
1107     // preprocess audio (volume)
1108     if (audio_volume != 256) {
1109         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
1110         void *samples = decoded_frame->data[0];
1111         switch (avctx->sample_fmt) {
1112         case AV_SAMPLE_FMT_U8:
1113         {
1114             uint8_t *volp = samples;
1115             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1116                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
1117                 *volp++ = av_clip_uint8(v);
1118             }
1119             break;
1120         }
1121         case AV_SAMPLE_FMT_S16:
1122         {
1123             int16_t *volp = samples;
1124             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1125                 int v = ((*volp) * audio_volume + 128) >> 8;
1126                 *volp++ = av_clip_int16(v);
1127             }
1128             break;
1129         }
1130         case AV_SAMPLE_FMT_S32:
1131         {
1132             int32_t *volp = samples;
1133             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1134                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
1135                 *volp++ = av_clipl_int32(v);
1136             }
1137             break;
1138         }
1139         case AV_SAMPLE_FMT_FLT:
1140         {
1141             float *volp = samples;
1142             float scale = audio_volume / 256.f;
1143             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1144                 *volp++ *= scale;
1145             }
1146             break;
1147         }
1148         case AV_SAMPLE_FMT_DBL:
1149         {
1150             double *volp = samples;
1151             double scale = audio_volume / 256.;
1152             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1153                 *volp++ *= scale;
1154             }
1155             break;
1156         }
1157         default:
1158             av_log(NULL, AV_LOG_FATAL,
1159                    "Audio volume adjustment on sample format %s is not supported.\n",
1160                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
1161             exit(1);
1162         }
1163     }
1164
1165     rate_emu_sleep(ist);
1166
1167     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1168                        ist->resample_channels       != avctx->channels               ||
1169                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1170                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1171     if (resample_changed) {
1172         char layout1[64], layout2[64];
1173
1174         if (!guess_input_channel_layout(ist)) {
1175             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1176                    "layout for Input Stream #%d.%d\n", ist->file_index,
1177                    ist->st->index);
1178             exit(1);
1179         }
1180         decoded_frame->channel_layout = avctx->channel_layout;
1181
1182         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1183                                      ist->resample_channel_layout);
1184         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1185                                      decoded_frame->channel_layout);
1186
1187         av_log(NULL, AV_LOG_INFO,
1188                "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",
1189                ist->file_index, ist->st->index,
1190                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1191                ist->resample_channels, layout1,
1192                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1193                avctx->channels, layout2);
1194
1195         ist->resample_sample_fmt     = decoded_frame->format;
1196         ist->resample_sample_rate    = decoded_frame->sample_rate;
1197         ist->resample_channel_layout = decoded_frame->channel_layout;
1198         ist->resample_channels       = avctx->channels;
1199
1200         for (i = 0; i < nb_filtergraphs; i++)
1201             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1202                 configure_filtergraph(filtergraphs[i]) < 0) {
1203                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1204                 exit(1);
1205             }
1206     }
1207
1208     if (decoded_frame->pts != AV_NOPTS_VALUE)
1209         decoded_frame->pts = av_rescale_q(decoded_frame->pts,
1210                                           ist->st->time_base,
1211                                           (AVRational){1, ist->st->codec->sample_rate});
1212     for (i = 0; i < ist->nb_filters; i++)
1213         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1214
1215     return ret;
1216 }
1217
1218 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1219 {
1220     AVFrame *decoded_frame;
1221     void *buffer_to_free = NULL;
1222     int i, ret = 0, resample_changed;
1223
1224     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1225         return AVERROR(ENOMEM);
1226     decoded_frame = ist->decoded_frame;
1227
1228     ret = avcodec_decode_video2(ist->st->codec,
1229                                 decoded_frame, got_output, pkt);
1230     if (!*got_output || ret < 0) {
1231         if (!pkt->size) {
1232             for (i = 0; i < ist->nb_filters; i++)
1233                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1234         }
1235         return ret;
1236     }
1237
1238     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
1239                                            decoded_frame->pkt_dts);
1240     pkt->size = 0;
1241     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
1242
1243     rate_emu_sleep(ist);
1244
1245     if (ist->st->sample_aspect_ratio.num)
1246         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1247
1248     resample_changed = ist->resample_width   != decoded_frame->width  ||
1249                        ist->resample_height  != decoded_frame->height ||
1250                        ist->resample_pix_fmt != decoded_frame->format;
1251     if (resample_changed) {
1252         av_log(NULL, AV_LOG_INFO,
1253                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1254                ist->file_index, ist->st->index,
1255                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1256                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1257
1258         ret = poll_filters();
1259         if (ret < 0 && (ret != AVERROR_EOF && ret != AVERROR(EAGAIN)))
1260             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
1261
1262         ist->resample_width   = decoded_frame->width;
1263         ist->resample_height  = decoded_frame->height;
1264         ist->resample_pix_fmt = decoded_frame->format;
1265
1266         for (i = 0; i < nb_filtergraphs; i++)
1267             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1268                 configure_filtergraph(filtergraphs[i]) < 0) {
1269                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1270                 exit(1);
1271             }
1272     }
1273
1274     for (i = 0; i < ist->nb_filters; i++) {
1275         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
1276             FrameBuffer      *buf = decoded_frame->opaque;
1277             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
1278                                         decoded_frame->data, decoded_frame->linesize,
1279                                         AV_PERM_READ | AV_PERM_PRESERVE,
1280                                         ist->st->codec->width, ist->st->codec->height,
1281                                         ist->st->codec->pix_fmt);
1282
1283             avfilter_copy_frame_props(fb, decoded_frame);
1284             fb->buf->priv           = buf;
1285             fb->buf->free           = filter_release_buffer;
1286
1287             buf->refcount++;
1288             av_buffersrc_buffer(ist->filters[i]->filter, fb);
1289         } else
1290             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1291     }
1292
1293     av_free(buffer_to_free);
1294     return ret;
1295 }
1296
1297 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1298 {
1299     AVSubtitle subtitle;
1300     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1301                                           &subtitle, got_output, pkt);
1302     if (ret < 0)
1303         return ret;
1304     if (!*got_output)
1305         return ret;
1306
1307     rate_emu_sleep(ist);
1308
1309     for (i = 0; i < nb_output_streams; i++) {
1310         OutputStream *ost = output_streams[i];
1311
1312         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1313             continue;
1314
1315         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
1316     }
1317
1318     avsubtitle_free(&subtitle);
1319     return ret;
1320 }
1321
1322 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1323 static int output_packet(InputStream *ist, const AVPacket *pkt)
1324 {
1325     int i;
1326     int got_output;
1327     AVPacket avpkt;
1328
1329     if (ist->next_dts == AV_NOPTS_VALUE)
1330         ist->next_dts = ist->last_dts;
1331
1332     if (pkt == NULL) {
1333         /* EOF handling */
1334         av_init_packet(&avpkt);
1335         avpkt.data = NULL;
1336         avpkt.size = 0;
1337         goto handle_eof;
1338     } else {
1339         avpkt = *pkt;
1340     }
1341
1342     if (pkt->dts != AV_NOPTS_VALUE)
1343         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1344
1345     // while we have more to decode or while the decoder did output something on EOF
1346     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1347         int ret = 0;
1348     handle_eof:
1349
1350         ist->last_dts = ist->next_dts;
1351
1352         if (avpkt.size && avpkt.size != pkt->size) {
1353             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1354                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1355             ist->showed_multi_packet_warning = 1;
1356         }
1357
1358         switch (ist->st->codec->codec_type) {
1359         case AVMEDIA_TYPE_AUDIO:
1360             ret = decode_audio    (ist, &avpkt, &got_output);
1361             break;
1362         case AVMEDIA_TYPE_VIDEO:
1363             ret = decode_video    (ist, &avpkt, &got_output);
1364             if (avpkt.duration)
1365                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1366             else if (ist->st->avg_frame_rate.num)
1367                 ist->next_dts += av_rescale_q(1, av_inv_q(ist->st->avg_frame_rate),
1368                                               AV_TIME_BASE_Q);
1369             else if (ist->st->codec->time_base.num != 0) {
1370                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
1371                                                    ist->st->codec->ticks_per_frame;
1372                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
1373             }
1374             break;
1375         case AVMEDIA_TYPE_SUBTITLE:
1376             ret = transcode_subtitles(ist, &avpkt, &got_output);
1377             break;
1378         default:
1379             return -1;
1380         }
1381
1382         if (ret < 0)
1383             return ret;
1384         // touch data and size only if not EOF
1385         if (pkt) {
1386             avpkt.data += ret;
1387             avpkt.size -= ret;
1388         }
1389         if (!got_output) {
1390             continue;
1391         }
1392     }
1393
1394     /* handle stream copy */
1395     if (!ist->decoding_needed) {
1396         rate_emu_sleep(ist);
1397         ist->last_dts = ist->next_dts;
1398         switch (ist->st->codec->codec_type) {
1399         case AVMEDIA_TYPE_AUDIO:
1400             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1401                              ist->st->codec->sample_rate;
1402             break;
1403         case AVMEDIA_TYPE_VIDEO:
1404             if (ist->st->codec->time_base.num != 0) {
1405                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
1406                 ist->next_dts += ((int64_t)AV_TIME_BASE *
1407                                   ist->st->codec->time_base.num * ticks) /
1408                                   ist->st->codec->time_base.den;
1409             }
1410             break;
1411         }
1412     }
1413     for (i = 0; pkt && i < nb_output_streams; i++) {
1414         OutputStream *ost = output_streams[i];
1415
1416         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1417             continue;
1418
1419         do_streamcopy(ist, ost, pkt);
1420     }
1421
1422     return 0;
1423 }
1424
1425 static void print_sdp(void)
1426 {
1427     char sdp[2048];
1428     int i;
1429     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
1430
1431     if (!avc)
1432         exit(1);
1433     for (i = 0; i < nb_output_files; i++)
1434         avc[i] = output_files[i]->ctx;
1435
1436     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
1437     printf("SDP:\n%s\n", sdp);
1438     fflush(stdout);
1439     av_freep(&avc);
1440 }
1441
1442 static int init_input_stream(int ist_index, char *error, int error_len)
1443 {
1444     int i, ret;
1445     InputStream *ist = input_streams[ist_index];
1446     if (ist->decoding_needed) {
1447         AVCodec *codec = ist->dec;
1448         if (!codec) {
1449             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
1450                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
1451             return AVERROR(EINVAL);
1452         }
1453
1454         /* update requested sample format for the decoder based on the
1455            corresponding encoder sample format */
1456         for (i = 0; i < nb_output_streams; i++) {
1457             OutputStream *ost = output_streams[i];
1458             if (ost->source_index == ist_index) {
1459                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
1460                 break;
1461             }
1462         }
1463
1464         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
1465             ist->st->codec->get_buffer     = codec_get_buffer;
1466             ist->st->codec->release_buffer = codec_release_buffer;
1467             ist->st->codec->opaque         = &ist->buffer_pool;
1468         }
1469
1470         if (!av_dict_get(ist->opts, "threads", NULL, 0))
1471             av_dict_set(&ist->opts, "threads", "auto", 0);
1472         if ((ret = avcodec_open2(ist->st->codec, codec, &ist->opts)) < 0) {
1473             if (ret == AVERROR_EXPERIMENTAL)
1474                 abort_codec_experimental(codec, 0);
1475             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
1476                     ist->file_index, ist->st->index);
1477             return ret;
1478         }
1479         assert_avoptions(ist->opts);
1480     }
1481
1482     ist->last_dts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
1483     ist->next_dts = AV_NOPTS_VALUE;
1484     init_pts_correction(&ist->pts_ctx);
1485     ist->is_start = 1;
1486
1487     return 0;
1488 }
1489
1490 static InputStream *get_input_stream(OutputStream *ost)
1491 {
1492     if (ost->source_index >= 0)
1493         return input_streams[ost->source_index];
1494
1495     if (ost->filter) {
1496         FilterGraph *fg = ost->filter->graph;
1497         int i;
1498
1499         for (i = 0; i < fg->nb_inputs; i++)
1500             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
1501                 return fg->inputs[i]->ist;
1502     }
1503
1504     return NULL;
1505 }
1506
1507 static void parse_forced_key_frames(char *kf, OutputStream *ost,
1508                                     AVCodecContext *avctx)
1509 {
1510     char *p;
1511     int n = 1, i;
1512     int64_t t;
1513
1514     for (p = kf; *p; p++)
1515         if (*p == ',')
1516             n++;
1517     ost->forced_kf_count = n;
1518     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
1519     if (!ost->forced_kf_pts) {
1520         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
1521         exit(1);
1522     }
1523
1524     p = kf;
1525     for (i = 0; i < n; i++) {
1526         char *next = strchr(p, ',');
1527
1528         if (next)
1529             *next++ = 0;
1530
1531         t = parse_time_or_die("force_key_frames", p, 1);
1532         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
1533
1534         p = next;
1535     }
1536 }
1537
1538 static int transcode_init(void)
1539 {
1540     int ret = 0, i, j, k;
1541     AVFormatContext *oc;
1542     AVCodecContext *codec;
1543     OutputStream *ost;
1544     InputStream *ist;
1545     char error[1024];
1546     int want_sdp = 1;
1547
1548     /* init framerate emulation */
1549     for (i = 0; i < nb_input_files; i++) {
1550         InputFile *ifile = input_files[i];
1551         if (ifile->rate_emu)
1552             for (j = 0; j < ifile->nb_streams; j++)
1553                 input_streams[j + ifile->ist_index]->start = av_gettime();
1554     }
1555
1556     /* output stream init */
1557     for (i = 0; i < nb_output_files; i++) {
1558         oc = output_files[i]->ctx;
1559         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
1560             av_dump_format(oc, i, oc->filename, 1);
1561             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
1562             return AVERROR(EINVAL);
1563         }
1564     }
1565
1566     /* init complex filtergraphs */
1567     for (i = 0; i < nb_filtergraphs; i++)
1568         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
1569             return ret;
1570
1571     /* for each output stream, we compute the right encoding parameters */
1572     for (i = 0; i < nb_output_streams; i++) {
1573         AVCodecContext *icodec = NULL;
1574         ost = output_streams[i];
1575         oc  = output_files[ost->file_index]->ctx;
1576         ist = get_input_stream(ost);
1577
1578         if (ost->attachment_filename)
1579             continue;
1580
1581         codec  = ost->st->codec;
1582
1583         if (ist) {
1584             icodec = ist->st->codec;
1585
1586             ost->st->disposition          = ist->st->disposition;
1587             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
1588             codec->chroma_sample_location = icodec->chroma_sample_location;
1589         }
1590
1591         if (ost->stream_copy) {
1592             uint64_t extra_size;
1593
1594             av_assert0(ist && !ost->filter);
1595
1596             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
1597
1598             if (extra_size > INT_MAX) {
1599                 return AVERROR(EINVAL);
1600             }
1601
1602             /* if stream_copy is selected, no need to decode or encode */
1603             codec->codec_id   = icodec->codec_id;
1604             codec->codec_type = icodec->codec_type;
1605
1606             if (!codec->codec_tag) {
1607                 if (!oc->oformat->codec_tag ||
1608                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
1609                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
1610                     codec->codec_tag = icodec->codec_tag;
1611             }
1612
1613             codec->bit_rate       = icodec->bit_rate;
1614             codec->rc_max_rate    = icodec->rc_max_rate;
1615             codec->rc_buffer_size = icodec->rc_buffer_size;
1616             codec->field_order    = icodec->field_order;
1617             codec->extradata      = av_mallocz(extra_size);
1618             if (!codec->extradata) {
1619                 return AVERROR(ENOMEM);
1620             }
1621             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
1622             codec->extradata_size = icodec->extradata_size;
1623             if (!copy_tb) {
1624                 codec->time_base      = icodec->time_base;
1625                 codec->time_base.num *= icodec->ticks_per_frame;
1626                 av_reduce(&codec->time_base.num, &codec->time_base.den,
1627                           codec->time_base.num, codec->time_base.den, INT_MAX);
1628             } else
1629                 codec->time_base = ist->st->time_base;
1630
1631             switch (codec->codec_type) {
1632             case AVMEDIA_TYPE_AUDIO:
1633                 if (audio_volume != 256) {
1634                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
1635                     exit(1);
1636                 }
1637                 codec->channel_layout     = icodec->channel_layout;
1638                 codec->sample_rate        = icodec->sample_rate;
1639                 codec->channels           = icodec->channels;
1640                 codec->frame_size         = icodec->frame_size;
1641                 codec->audio_service_type = icodec->audio_service_type;
1642                 codec->block_align        = icodec->block_align;
1643                 break;
1644             case AVMEDIA_TYPE_VIDEO:
1645                 codec->pix_fmt            = icodec->pix_fmt;
1646                 codec->width              = icodec->width;
1647                 codec->height             = icodec->height;
1648                 codec->has_b_frames       = icodec->has_b_frames;
1649                 if (!codec->sample_aspect_ratio.num) {
1650                     codec->sample_aspect_ratio   =
1651                     ost->st->sample_aspect_ratio =
1652                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
1653                         ist->st->codec->sample_aspect_ratio.num ?
1654                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
1655                 }
1656                 break;
1657             case AVMEDIA_TYPE_SUBTITLE:
1658                 codec->width  = icodec->width;
1659                 codec->height = icodec->height;
1660                 break;
1661             case AVMEDIA_TYPE_DATA:
1662             case AVMEDIA_TYPE_ATTACHMENT:
1663                 break;
1664             default:
1665                 abort();
1666             }
1667         } else {
1668             if (!ost->enc) {
1669                 /* should only happen when a default codec is not present. */
1670                 snprintf(error, sizeof(error), "Automatic encoder selection "
1671                          "failed for output stream #%d:%d. Default encoder for "
1672                          "format %s is probably disabled. Please choose an "
1673                          "encoder manually.\n", ost->file_index, ost->index,
1674                          oc->oformat->name);
1675                 ret = AVERROR(EINVAL);
1676                 goto dump_format;
1677             }
1678
1679             if (ist)
1680                 ist->decoding_needed = 1;
1681             ost->encoding_needed = 1;
1682
1683             /*
1684              * We want CFR output if and only if one of those is true:
1685              * 1) user specified output framerate with -r
1686              * 2) user specified -vsync cfr
1687              * 3) output format is CFR and the user didn't force vsync to
1688              *    something else than CFR
1689              *
1690              * in such a case, set ost->frame_rate
1691              */
1692             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1693                 !ost->frame_rate.num && ist &&
1694                 (video_sync_method ==  VSYNC_CFR ||
1695                  (video_sync_method ==  VSYNC_AUTO &&
1696                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
1697                 ost->frame_rate = ist->framerate.num ? ist->framerate :
1698                                   ist->st->avg_frame_rate.num ?
1699                                   ist->st->avg_frame_rate :
1700                                   (AVRational){25, 1};
1701
1702                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
1703                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
1704                     ost->frame_rate = ost->enc->supported_framerates[idx];
1705                 }
1706             }
1707
1708             if (!ost->filter &&
1709                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
1710                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
1711                     FilterGraph *fg;
1712                     fg = init_simple_filtergraph(ist, ost);
1713                     if (configure_filtergraph(fg)) {
1714                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
1715                         exit(1);
1716                     }
1717             }
1718
1719             switch (codec->codec_type) {
1720             case AVMEDIA_TYPE_AUDIO:
1721                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
1722                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
1723                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
1724                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
1725                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
1726                 break;
1727             case AVMEDIA_TYPE_VIDEO:
1728                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
1729
1730                 codec->width  = ost->filter->filter->inputs[0]->w;
1731                 codec->height = ost->filter->filter->inputs[0]->h;
1732                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
1733                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
1734                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
1735                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
1736                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
1737
1738                 if (icodec &&
1739                     (codec->width   != icodec->width  ||
1740                      codec->height  != icodec->height ||
1741                      codec->pix_fmt != icodec->pix_fmt)) {
1742                     codec->bits_per_raw_sample = 0;
1743                 }
1744
1745                 if (ost->forced_keyframes)
1746                     parse_forced_key_frames(ost->forced_keyframes, ost,
1747                                             ost->st->codec);
1748                 break;
1749             case AVMEDIA_TYPE_SUBTITLE:
1750                 codec->time_base = (AVRational){1, 1000};
1751                 break;
1752             default:
1753                 abort();
1754                 break;
1755             }
1756             /* two pass mode */
1757             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
1758                 char logfilename[1024];
1759                 FILE *f;
1760
1761                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
1762                          ost->logfile_prefix ? ost->logfile_prefix :
1763                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
1764                          i);
1765                 if (!strcmp(ost->enc->name, "libx264")) {
1766                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
1767                 } else {
1768                     if (codec->flags & CODEC_FLAG_PASS1) {
1769                         f = fopen(logfilename, "wb");
1770                         if (!f) {
1771                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
1772                                    logfilename, strerror(errno));
1773                             exit(1);
1774                         }
1775                         ost->logfile = f;
1776                     } else {
1777                         char  *logbuffer;
1778                         size_t logbuffer_size;
1779                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
1780                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
1781                                    logfilename);
1782                             exit(1);
1783                         }
1784                         codec->stats_in = logbuffer;
1785                     }
1786                 }
1787             }
1788         }
1789     }
1790
1791     /* open each encoder */
1792     for (i = 0; i < nb_output_streams; i++) {
1793         ost = output_streams[i];
1794         if (ost->encoding_needed) {
1795             AVCodec      *codec = ost->enc;
1796             AVCodecContext *dec = NULL;
1797
1798             if ((ist = get_input_stream(ost)))
1799                 dec = ist->st->codec;
1800             if (dec && dec->subtitle_header) {
1801                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
1802                 if (!ost->st->codec->subtitle_header) {
1803                     ret = AVERROR(ENOMEM);
1804                     goto dump_format;
1805                 }
1806                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
1807                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
1808             }
1809             if (!av_dict_get(ost->opts, "threads", NULL, 0))
1810                 av_dict_set(&ost->opts, "threads", "auto", 0);
1811             if ((ret = avcodec_open2(ost->st->codec, codec, &ost->opts)) < 0) {
1812                 if (ret == AVERROR_EXPERIMENTAL)
1813                     abort_codec_experimental(codec, 1);
1814                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
1815                         ost->file_index, ost->index);
1816                 goto dump_format;
1817             }
1818             assert_avoptions(ost->opts);
1819             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
1820                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
1821                                              "It takes bits/s as argument, not kbits/s\n");
1822             extra_size += ost->st->codec->extradata_size;
1823
1824             if (ost->st->codec->me_threshold)
1825                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
1826         }
1827     }
1828
1829     /* init input streams */
1830     for (i = 0; i < nb_input_streams; i++)
1831         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
1832             goto dump_format;
1833
1834     /* discard unused programs */
1835     for (i = 0; i < nb_input_files; i++) {
1836         InputFile *ifile = input_files[i];
1837         for (j = 0; j < ifile->ctx->nb_programs; j++) {
1838             AVProgram *p = ifile->ctx->programs[j];
1839             int discard  = AVDISCARD_ALL;
1840
1841             for (k = 0; k < p->nb_stream_indexes; k++)
1842                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
1843                     discard = AVDISCARD_DEFAULT;
1844                     break;
1845                 }
1846             p->discard = discard;
1847         }
1848     }
1849
1850     /* open files and write file headers */
1851     for (i = 0; i < nb_output_files; i++) {
1852         oc = output_files[i]->ctx;
1853         oc->interrupt_callback = int_cb;
1854         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
1855             char errbuf[128];
1856             const char *errbuf_ptr = errbuf;
1857             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
1858                 errbuf_ptr = strerror(AVUNERROR(ret));
1859             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
1860             ret = AVERROR(EINVAL);
1861             goto dump_format;
1862         }
1863         assert_avoptions(output_files[i]->opts);
1864         if (strcmp(oc->oformat->name, "rtp")) {
1865             want_sdp = 0;
1866         }
1867     }
1868
1869  dump_format:
1870     /* dump the file output parameters - cannot be done before in case
1871        of stream copy */
1872     for (i = 0; i < nb_output_files; i++) {
1873         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
1874     }
1875
1876     /* dump the stream mapping */
1877     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
1878     for (i = 0; i < nb_input_streams; i++) {
1879         ist = input_streams[i];
1880
1881         for (j = 0; j < ist->nb_filters; j++) {
1882             if (ist->filters[j]->graph->graph_desc) {
1883                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
1884                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
1885                        ist->filters[j]->name);
1886                 if (nb_filtergraphs > 1)
1887                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
1888                 av_log(NULL, AV_LOG_INFO, "\n");
1889             }
1890         }
1891     }
1892
1893     for (i = 0; i < nb_output_streams; i++) {
1894         ost = output_streams[i];
1895
1896         if (ost->attachment_filename) {
1897             /* an attached file */
1898             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
1899                    ost->attachment_filename, ost->file_index, ost->index);
1900             continue;
1901         }
1902
1903         if (ost->filter && ost->filter->graph->graph_desc) {
1904             /* output from a complex graph */
1905             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
1906             if (nb_filtergraphs > 1)
1907                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
1908
1909             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
1910                    ost->index, ost->enc ? ost->enc->name : "?");
1911             continue;
1912         }
1913
1914         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
1915                input_streams[ost->source_index]->file_index,
1916                input_streams[ost->source_index]->st->index,
1917                ost->file_index,
1918                ost->index);
1919         if (ost->sync_ist != input_streams[ost->source_index])
1920             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
1921                    ost->sync_ist->file_index,
1922                    ost->sync_ist->st->index);
1923         if (ost->stream_copy)
1924             av_log(NULL, AV_LOG_INFO, " (copy)");
1925         else
1926             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
1927                    input_streams[ost->source_index]->dec->name : "?",
1928                    ost->enc ? ost->enc->name : "?");
1929         av_log(NULL, AV_LOG_INFO, "\n");
1930     }
1931
1932     if (ret) {
1933         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
1934         return ret;
1935     }
1936
1937     if (want_sdp) {
1938         print_sdp();
1939     }
1940
1941     return 0;
1942 }
1943
1944 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
1945 static int need_output(void)
1946 {
1947     int i;
1948
1949     for (i = 0; i < nb_output_streams; i++) {
1950         OutputStream *ost    = output_streams[i];
1951         OutputFile *of       = output_files[ost->file_index];
1952         AVFormatContext *os  = output_files[ost->file_index]->ctx;
1953
1954         if (ost->finished ||
1955             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
1956             continue;
1957         if (ost->frame_number >= ost->max_frames) {
1958             int j;
1959             for (j = 0; j < of->ctx->nb_streams; j++)
1960                 output_streams[of->ost_index + j]->finished = 1;
1961             continue;
1962         }
1963
1964         return 1;
1965     }
1966
1967     return 0;
1968 }
1969
1970 static InputFile *select_input_file(void)
1971 {
1972     InputFile *ifile = NULL;
1973     int64_t ipts_min = INT64_MAX;
1974     int i;
1975
1976     for (i = 0; i < nb_input_streams; i++) {
1977         InputStream *ist = input_streams[i];
1978         int64_t ipts     = ist->last_dts;
1979
1980         if (ist->discard || input_files[ist->file_index]->eagain)
1981             continue;
1982         if (!input_files[ist->file_index]->eof_reached) {
1983             if (ipts < ipts_min) {
1984                 ipts_min = ipts;
1985                 ifile    = input_files[ist->file_index];
1986             }
1987         }
1988     }
1989
1990     return ifile;
1991 }
1992
1993 #if HAVE_PTHREADS
1994 static void *input_thread(void *arg)
1995 {
1996     InputFile *f = arg;
1997     int ret = 0;
1998
1999     while (!transcoding_finished && ret >= 0) {
2000         AVPacket pkt;
2001         ret = av_read_frame(f->ctx, &pkt);
2002
2003         if (ret == AVERROR(EAGAIN)) {
2004             av_usleep(10000);
2005             ret = 0;
2006             continue;
2007         } else if (ret < 0)
2008             break;
2009
2010         pthread_mutex_lock(&f->fifo_lock);
2011         while (!av_fifo_space(f->fifo))
2012             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2013
2014         av_dup_packet(&pkt);
2015         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2016
2017         pthread_mutex_unlock(&f->fifo_lock);
2018     }
2019
2020     f->finished = 1;
2021     return NULL;
2022 }
2023
2024 static void free_input_threads(void)
2025 {
2026     int i;
2027
2028     if (nb_input_files == 1)
2029         return;
2030
2031     transcoding_finished = 1;
2032
2033     for (i = 0; i < nb_input_files; i++) {
2034         InputFile *f = input_files[i];
2035         AVPacket pkt;
2036
2037         if (!f->fifo || f->joined)
2038             continue;
2039
2040         pthread_mutex_lock(&f->fifo_lock);
2041         while (av_fifo_size(f->fifo)) {
2042             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2043             av_free_packet(&pkt);
2044         }
2045         pthread_cond_signal(&f->fifo_cond);
2046         pthread_mutex_unlock(&f->fifo_lock);
2047
2048         pthread_join(f->thread, NULL);
2049         f->joined = 1;
2050
2051         while (av_fifo_size(f->fifo)) {
2052             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2053             av_free_packet(&pkt);
2054         }
2055         av_fifo_free(f->fifo);
2056     }
2057 }
2058
2059 static int init_input_threads(void)
2060 {
2061     int i, ret;
2062
2063     if (nb_input_files == 1)
2064         return 0;
2065
2066     for (i = 0; i < nb_input_files; i++) {
2067         InputFile *f = input_files[i];
2068
2069         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2070             return AVERROR(ENOMEM);
2071
2072         pthread_mutex_init(&f->fifo_lock, NULL);
2073         pthread_cond_init (&f->fifo_cond, NULL);
2074
2075         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2076             return AVERROR(ret);
2077     }
2078     return 0;
2079 }
2080
2081 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2082 {
2083     int ret = 0;
2084
2085     pthread_mutex_lock(&f->fifo_lock);
2086
2087     if (av_fifo_size(f->fifo)) {
2088         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2089         pthread_cond_signal(&f->fifo_cond);
2090     } else {
2091         if (f->finished)
2092             ret = AVERROR_EOF;
2093         else
2094             ret = AVERROR(EAGAIN);
2095     }
2096
2097     pthread_mutex_unlock(&f->fifo_lock);
2098
2099     return ret;
2100 }
2101 #endif
2102
2103 static int get_input_packet(InputFile *f, AVPacket *pkt)
2104 {
2105 #if HAVE_PTHREADS
2106     if (nb_input_files > 1)
2107         return get_input_packet_mt(f, pkt);
2108 #endif
2109     return av_read_frame(f->ctx, pkt);
2110 }
2111
2112 static int got_eagain(void)
2113 {
2114     int i;
2115     for (i = 0; i < nb_input_files; i++)
2116         if (input_files[i]->eagain)
2117             return 1;
2118     return 0;
2119 }
2120
2121 static void reset_eagain(void)
2122 {
2123     int i;
2124     for (i = 0; i < nb_input_files; i++)
2125         input_files[i]->eagain = 0;
2126 }
2127
2128 /*
2129  * Read one packet from an input file and send it for
2130  * - decoding -> lavfi (audio/video)
2131  * - decoding -> encoding -> muxing (subtitles)
2132  * - muxing (streamcopy)
2133  *
2134  * Return
2135  * - 0 -- one packet was read and processed
2136  * - AVERROR(EAGAIN) -- no packets were available for selected file,
2137  *   this function should be called again
2138  * - AVERROR_EOF -- this function should not be called again
2139  */
2140 static int process_input(void)
2141 {
2142     InputFile *ifile;
2143     AVFormatContext *is;
2144     InputStream *ist;
2145     AVPacket pkt;
2146     int ret, i, j;
2147
2148     /* select the stream that we must read now */
2149     ifile = select_input_file();
2150     /* if none, if is finished */
2151     if (!ifile) {
2152         if (got_eagain()) {
2153             reset_eagain();
2154             av_usleep(10000);
2155             return AVERROR(EAGAIN);
2156         }
2157         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from.\n");
2158         return AVERROR_EOF;
2159     }
2160
2161     is  = ifile->ctx;
2162     ret = get_input_packet(ifile, &pkt);
2163
2164     if (ret == AVERROR(EAGAIN)) {
2165         ifile->eagain = 1;
2166         return ret;
2167     }
2168     if (ret < 0) {
2169         if (ret != AVERROR_EOF) {
2170             print_error(is->filename, ret);
2171             if (exit_on_error)
2172                 exit(1);
2173         }
2174         ifile->eof_reached = 1;
2175
2176         for (i = 0; i < ifile->nb_streams; i++) {
2177             ist = input_streams[ifile->ist_index + i];
2178             if (ist->decoding_needed)
2179                 output_packet(ist, NULL);
2180
2181             /* mark all outputs that don't go through lavfi as finished */
2182             for (j = 0; j < nb_output_streams; j++) {
2183                 OutputStream *ost = output_streams[j];
2184
2185                 if (ost->source_index == ifile->ist_index + i &&
2186                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
2187                     ost->finished= 1;
2188             }
2189         }
2190
2191         return AVERROR(EAGAIN);
2192     }
2193
2194     reset_eagain();
2195
2196     if (do_pkt_dump) {
2197         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2198                          is->streams[pkt.stream_index]);
2199     }
2200     /* the following test is needed in case new streams appear
2201        dynamically in stream : we ignore them */
2202     if (pkt.stream_index >= ifile->nb_streams)
2203         goto discard_packet;
2204
2205     ist = input_streams[ifile->ist_index + pkt.stream_index];
2206     if (ist->discard)
2207         goto discard_packet;
2208
2209     if (pkt.dts != AV_NOPTS_VALUE)
2210         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2211     if (pkt.pts != AV_NOPTS_VALUE)
2212         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2213
2214     if (pkt.pts != AV_NOPTS_VALUE)
2215         pkt.pts *= ist->ts_scale;
2216     if (pkt.dts != AV_NOPTS_VALUE)
2217         pkt.dts *= ist->ts_scale;
2218
2219     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
2220         (is->iformat->flags & AVFMT_TS_DISCONT)) {
2221         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2222         int64_t delta   = pkt_dts - ist->next_dts;
2223
2224         if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
2225             ifile->ts_offset -= delta;
2226             av_log(NULL, AV_LOG_DEBUG,
2227                    "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2228                    delta, ifile->ts_offset);
2229             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2230             if (pkt.pts != AV_NOPTS_VALUE)
2231                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2232         }
2233     }
2234
2235     ret = output_packet(ist, &pkt);
2236     if (ret < 0) {
2237         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
2238                ist->file_index, ist->st->index);
2239         if (exit_on_error)
2240             exit(1);
2241     }
2242
2243 discard_packet:
2244     av_free_packet(&pkt);
2245
2246     return 0;
2247 }
2248
2249 /*
2250  * The following code is the main loop of the file converter
2251  */
2252 static int transcode(void)
2253 {
2254     int ret, i, need_input = 1;
2255     AVFormatContext *os;
2256     OutputStream *ost;
2257     InputStream *ist;
2258     int64_t timer_start;
2259
2260     ret = transcode_init();
2261     if (ret < 0)
2262         goto fail;
2263
2264     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2265     term_init();
2266
2267     timer_start = av_gettime();
2268
2269 #if HAVE_PTHREADS
2270     if ((ret = init_input_threads()) < 0)
2271         goto fail;
2272 #endif
2273
2274     while (!received_sigterm) {
2275         /* check if there's any stream where output is still needed */
2276         if (!need_output()) {
2277             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2278             break;
2279         }
2280
2281         /* read and process one input packet if needed */
2282         if (need_input) {
2283             ret = process_input();
2284             if (ret == AVERROR_EOF)
2285                 need_input = 0;
2286         }
2287
2288         ret = poll_filters();
2289         if (ret < 0) {
2290             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
2291                 continue;
2292
2293             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
2294             break;
2295         }
2296
2297         /* dump report by using the output first video and audio streams */
2298         print_report(0, timer_start);
2299     }
2300 #if HAVE_PTHREADS
2301     free_input_threads();
2302 #endif
2303
2304     /* at the end of stream, we must flush the decoder buffers */
2305     for (i = 0; i < nb_input_streams; i++) {
2306         ist = input_streams[i];
2307         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
2308             output_packet(ist, NULL);
2309         }
2310     }
2311     poll_filters();
2312     flush_encoders();
2313
2314     term_exit();
2315
2316     /* write the trailer if needed and close file */
2317     for (i = 0; i < nb_output_files; i++) {
2318         os = output_files[i]->ctx;
2319         av_write_trailer(os);
2320     }
2321
2322     /* dump report by using the first video and audio streams */
2323     print_report(1, timer_start);
2324
2325     /* close each encoder */
2326     for (i = 0; i < nb_output_streams; i++) {
2327         ost = output_streams[i];
2328         if (ost->encoding_needed) {
2329             av_freep(&ost->st->codec->stats_in);
2330             avcodec_close(ost->st->codec);
2331         }
2332     }
2333
2334     /* close each decoder */
2335     for (i = 0; i < nb_input_streams; i++) {
2336         ist = input_streams[i];
2337         if (ist->decoding_needed) {
2338             avcodec_close(ist->st->codec);
2339         }
2340     }
2341
2342     /* finished ! */
2343     ret = 0;
2344
2345  fail:
2346 #if HAVE_PTHREADS
2347     free_input_threads();
2348 #endif
2349
2350     if (output_streams) {
2351         for (i = 0; i < nb_output_streams; i++) {
2352             ost = output_streams[i];
2353             if (ost) {
2354                 if (ost->stream_copy)
2355                     av_freep(&ost->st->codec->extradata);
2356                 if (ost->logfile) {
2357                     fclose(ost->logfile);
2358                     ost->logfile = NULL;
2359                 }
2360                 av_freep(&ost->st->codec->subtitle_header);
2361                 av_free(ost->forced_kf_pts);
2362                 av_dict_free(&ost->opts);
2363             }
2364         }
2365     }
2366     return ret;
2367 }
2368
2369 static int64_t getutime(void)
2370 {
2371 #if HAVE_GETRUSAGE
2372     struct rusage rusage;
2373
2374     getrusage(RUSAGE_SELF, &rusage);
2375     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
2376 #elif HAVE_GETPROCESSTIMES
2377     HANDLE proc;
2378     FILETIME c, e, k, u;
2379     proc = GetCurrentProcess();
2380     GetProcessTimes(proc, &c, &e, &k, &u);
2381     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
2382 #else
2383     return av_gettime();
2384 #endif
2385 }
2386
2387 static int64_t getmaxrss(void)
2388 {
2389 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
2390     struct rusage rusage;
2391     getrusage(RUSAGE_SELF, &rusage);
2392     return (int64_t)rusage.ru_maxrss * 1024;
2393 #elif HAVE_GETPROCESSMEMORYINFO
2394     HANDLE proc;
2395     PROCESS_MEMORY_COUNTERS memcounters;
2396     proc = GetCurrentProcess();
2397     memcounters.cb = sizeof(memcounters);
2398     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
2399     return memcounters.PeakPagefileUsage;
2400 #else
2401     return 0;
2402 #endif
2403 }
2404
2405 static void parse_cpuflags(int argc, char **argv, const OptionDef *options)
2406 {
2407     int idx = locate_option(argc, argv, options, "cpuflags");
2408     if (idx && argv[idx + 1])
2409         opt_cpuflags(NULL, "cpuflags", argv[idx + 1]);
2410 }
2411
2412 int main(int argc, char **argv)
2413 {
2414     OptionsContext o = { 0 };
2415     int64_t ti;
2416
2417     atexit(exit_program);
2418
2419     reset_options(&o);
2420
2421     av_log_set_flags(AV_LOG_SKIP_REPEATED);
2422     parse_loglevel(argc, argv, options);
2423
2424     avcodec_register_all();
2425 #if CONFIG_AVDEVICE
2426     avdevice_register_all();
2427 #endif
2428     avfilter_register_all();
2429     av_register_all();
2430     avformat_network_init();
2431
2432     show_banner();
2433
2434     parse_cpuflags(argc, argv, options);
2435
2436     /* parse options */
2437     parse_options(&o, argc, argv, options, opt_output_file);
2438
2439     if (nb_output_files <= 0 && nb_input_files == 0) {
2440         show_usage();
2441         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
2442         exit(1);
2443     }
2444
2445     /* file converter / grab */
2446     if (nb_output_files <= 0) {
2447         fprintf(stderr, "At least one output file must be specified\n");
2448         exit(1);
2449     }
2450
2451     ti = getutime();
2452     if (transcode() < 0)
2453         exit(1);
2454     ti = getutime() - ti;
2455     if (do_benchmark) {
2456         int maxrss = getmaxrss() / 1024;
2457         printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
2458     }
2459
2460     exit(0);
2461     return 0;
2462 }