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

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