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 void exit_program(int ret)
 147 {
 148     int i, j;
 149
 150     for (i = 0; i < nb_filtergraphs; i++) {
 151         avfilter_graph_free(&filtergraphs[i]->graph);
 152         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
 153             av_freep(&filtergraphs[i]->inputs[j]->name);
 154             av_freep(&filtergraphs[i]->inputs[j]);
 155         }
 156         av_freep(&filtergraphs[i]->inputs);
 157         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
 158             av_freep(&filtergraphs[i]->outputs[j]->name);
 159             av_freep(&filtergraphs[i]->outputs[j]);
 160         }
 161         av_freep(&filtergraphs[i]->outputs);
 162         av_freep(&filtergraphs[i]);
 163     }
 164     av_freep(&filtergraphs);
 165
 166     /* close files */
 167     for (i = 0; i < nb_output_files; i++) {
 168         AVFormatContext *s = output_files[i]->ctx;
 169         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
 170             avio_close(s->pb);
 171         avformat_free_context(s);
 172         av_dict_free(&output_files[i]->opts);
 173         av_freep(&output_files[i]);
 174     }
 175     for (i = 0; i < nb_output_streams; i++) {
 176         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
 177         while (bsfc) {
 178             AVBitStreamFilterContext *next = bsfc->next;
 179             av_bitstream_filter_close(bsfc);
 180             bsfc = next;
 181         }
 182         output_streams[i]->bitstream_filters = NULL;
 183         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     exit(ret);
 223 }
 224
 225 void assert_avoptions(AVDictionary *m)
 226 {
 227     AVDictionaryEntry *t;
 228     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
 229         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
 230         exit_program(1);
 231     }
 232 }
 233
 234 static void assert_codec_experimental(AVCodecContext *c, int encoder)
 235 {
 236     const char *codec_string = encoder ? "encoder" : "decoder";
 237     AVCodec *codec;
 238     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
 239         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
 240         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
 241                 "results.\nAdd '-strict experimental' if you want to use it.\n",
 242                 codec_string, c->codec->name);
 243         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
 244         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
 245             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
 246                    codec_string, codec->name);
 247         exit_program(1);
 248     }
 249 }
 250
 251 /**
 252  * Update the requested input sample format based on the output sample format.
 253  * This is currently only used to request float output from decoders which
 254  * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
 255  * Ideally this will be removed in the future when decoders do not do format
 256  * conversion and only output in their native format.
 257  */
 258 static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
 259                               AVCodecContext *enc)
 260 {
 261     /* if sample formats match or a decoder sample format has already been
 262        requested, just return */
 263     if (enc->sample_fmt == dec->sample_fmt ||
 264         dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
 265         return;
 266
 267     /* if decoder supports more than one output format */
 268     if (dec_codec && dec_codec->sample_fmts &&
 269         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
 270         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
 271         const enum AVSampleFormat *p;
 272         int min_dec = INT_MAX, min_inc = INT_MAX;
 273         enum AVSampleFormat dec_fmt = AV_SAMPLE_FMT_NONE;
 274         enum AVSampleFormat inc_fmt = AV_SAMPLE_FMT_NONE;
 275
 276         /* find a matching sample format in the encoder */
 277         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
 278             if (*p == enc->sample_fmt) {
 279                 dec->request_sample_fmt = *p;
 280                 return;
 281             } else {
 282                 enum AVSampleFormat dfmt = av_get_packed_sample_fmt(*p);
 283                 enum AVSampleFormat efmt = av_get_packed_sample_fmt(enc->sample_fmt);
 284                 int fmt_diff = 32 * abs(dfmt - efmt);
 285                 if (av_sample_fmt_is_planar(*p) !=
 286                     av_sample_fmt_is_planar(enc->sample_fmt))
 287                     fmt_diff++;
 288                 if (dfmt == efmt) {
 289                     min_inc = fmt_diff;
 290                     inc_fmt = *p;
 291                 } else if (dfmt > efmt) {
 292                     if (fmt_diff < min_inc) {
 293                         min_inc = fmt_diff;
 294                         inc_fmt = *p;
 295                     }
 296                 } else {
 297                     if (fmt_diff < min_dec) {
 298                         min_dec = fmt_diff;
 299                         dec_fmt = *p;
 300                     }
 301                 }
 302             }
 303         }
 304
 305         /* if none match, provide the one that matches quality closest */
 306         dec->request_sample_fmt = min_inc != INT_MAX ? inc_fmt : dec_fmt;
 307     }
 308 }
 309
 310 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
 311 {
 312     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
 313     AVCodecContext          *avctx = ost->st->codec;
 314     int ret;
 315
 316     /*
 317      * Audio encoders may split the packets --  #frames in != #packets out.
 318      * But there is no reordering, so we can limit the number of output packets
 319      * by simply dropping them here.
 320      * Counting encoded video frames needs to be done separately because of
 321      * reordering, see do_video_out()
 322      */
 323     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
 324         if (ost->frame_number >= ost->max_frames) {
 325             av_free_packet(pkt);
 326             return;
 327         }
 328         ost->frame_number++;
 329     }
 330
 331     while (bsfc) {
 332         AVPacket new_pkt = *pkt;
 333         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
 334                                            &new_pkt.data, &new_pkt.size,
 335                                            pkt->data, pkt->size,
 336                                            pkt->flags & AV_PKT_FLAG_KEY);
 337         if (a > 0) {
 338             av_free_packet(pkt);
 339             new_pkt.destruct = av_destruct_packet;
 340         } else if (a < 0) {
 341             av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
 342                    bsfc->filter->name, pkt->stream_index,
 343                    avctx->codec ? avctx->codec->name : "copy");
 344             print_error("", a);
 345             if (exit_on_error)
 346                 exit_program(1);
 347         }
 348         *pkt = new_pkt;
 349
 350         bsfc = bsfc->next;
 351     }
 352
 353     pkt->stream_index = ost->index;
 354     ret = av_interleaved_write_frame(s, pkt);
 355     if (ret < 0) {
 356         print_error("av_interleaved_write_frame()", ret);
 357         exit_program(1);
 358     }
 359 }
 360
 361 static int check_recording_time(OutputStream *ost)
 362 {
 363     OutputFile *of = output_files[ost->file_index];
 364
 365     if (of->recording_time != INT64_MAX &&
 366         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
 367                       AV_TIME_BASE_Q) >= 0) {
 368         ost->finished = 1;
 369         return 0;
 370     }
 371     return 1;
 372 }
 373
 374 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
 375                          AVFrame *frame)
 376 {
 377     AVCodecContext *enc = ost->st->codec;
 378     AVPacket pkt;
 379     int got_packet = 0;
 380
 381     av_init_packet(&pkt);
 382     pkt.data = NULL;
 383     pkt.size = 0;
 384
 385     if (!check_recording_time(ost))
 386         return;
 387
 388     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
 389         frame->pts = ost->sync_opts;
 390     ost->sync_opts = frame->pts + frame->nb_samples;
 391
 392     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
 393         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
 394         exit_program(1);
 395     }
 396
 397     if (got_packet) {
 398         if (pkt.pts != AV_NOPTS_VALUE)
 399             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
 400         if (pkt.dts != AV_NOPTS_VALUE)
 401             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
 402         if (pkt.duration > 0)
 403             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
 404
 405         write_frame(s, &pkt, ost);
 406
 407         audio_size += pkt.size;
 408     }
 409 }
 410
 411 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
 412 {
 413     AVCodecContext *dec;
 414     AVPicture *picture2;
 415     AVPicture picture_tmp;
 416     uint8_t *buf = 0;
 417
 418     dec = ist->st->codec;
 419
 420     /* deinterlace : must be done before any resize */
 421     if (do_deinterlace) {
 422         int size;
 423
 424         /* create temporary picture */
 425         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
 426         buf  = av_malloc(size);
 427         if (!buf)
 428             return;
 429
 430         picture2 = &picture_tmp;
 431         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
 432
 433         if (avpicture_deinterlace(picture2, picture,
 434                                  dec->pix_fmt, dec->width, dec->height) < 0) {
 435             /* if error, do not deinterlace */
 436             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
 437             av_free(buf);
 438             buf = NULL;
 439             picture2 = picture;
 440         }
 441     } else {
 442         picture2 = picture;
 443     }
 444
 445     if (picture != picture2)
 446         *picture = *picture2;
 447     *bufp = buf;
 448 }
 449
 450 static void do_subtitle_out(AVFormatContext *s,
 451                             OutputStream *ost,
 452                             InputStream *ist,
 453                             AVSubtitle *sub,
 454                             int64_t pts)
 455 {
 456     static uint8_t *subtitle_out = NULL;
 457     int subtitle_out_max_size = 1024 * 1024;
 458     int subtitle_out_size, nb, i;
 459     AVCodecContext *enc;
 460     AVPacket pkt;
 461
 462     if (pts == AV_NOPTS_VALUE) {
 463         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
 464         if (exit_on_error)
 465             exit_program(1);
 466         return;
 467     }
 468
 469     enc = ost->st->codec;
 470
 471     if (!subtitle_out) {
 472         subtitle_out = av_malloc(subtitle_out_max_size);
 473     }
 474
 475     /* Note: DVB subtitle need one packet to draw them and one other
 476        packet to clear them */
 477     /* XXX: signal it in the codec context ? */
 478     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
 479         nb = 2;
 480     else
 481         nb = 1;
 482
 483     for (i = 0; i < nb; i++) {
 484         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
 485         if (!check_recording_time(ost))
 486             return;
 487
 488         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
 489         // start_display_time is required to be 0
 490         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
 491         sub->end_display_time  -= sub->start_display_time;
 492         sub->start_display_time = 0;
 493         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
 494                                                     subtitle_out_max_size, sub);
 495         if (subtitle_out_size < 0) {
 496             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
 497             exit_program(1);
 498         }
 499
 500         av_init_packet(&pkt);
 501         pkt.data = subtitle_out;
 502         pkt.size = subtitle_out_size;
 503         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
 504         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
 505             /* XXX: the pts correction is handled here. Maybe handling
 506                it in the codec would be better */
 507             if (i == 0)
 508                 pkt.pts += 90 * sub->start_display_time;
 509             else
 510                 pkt.pts += 90 * sub->end_display_time;
 511         }
 512         write_frame(s, &pkt, ost);
 513     }
 514 }
 515
 516 static void do_video_out(AVFormatContext *s,
 517                          OutputStream *ost,
 518                          AVFrame *in_picture,
 519                          int *frame_size, float quality)
 520 {
 521     int ret, format_video_sync;
 522     AVPacket pkt;
 523     AVCodecContext *enc = ost->st->codec;
 524
 525     *frame_size = 0;
 526
 527     format_video_sync = video_sync_method;
 528     if (format_video_sync == VSYNC_AUTO)
 529         format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
 530                             (s->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
 531     if (format_video_sync != VSYNC_PASSTHROUGH &&
 532         ost->frame_number &&
 533         in_picture->pts != AV_NOPTS_VALUE &&
 534         in_picture->pts < ost->sync_opts) {
 535         nb_frames_drop++;
 536         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
 537         return;
 538     }
 539
 540     if (in_picture->pts == AV_NOPTS_VALUE)
 541         in_picture->pts = ost->sync_opts;
 542     ost->sync_opts = in_picture->pts;
 543
 544
 545     if (!ost->frame_number)
 546         ost->first_pts = in_picture->pts;
 547
 548     av_init_packet(&pkt);
 549     pkt.data = NULL;
 550     pkt.size = 0;
 551
 552     if (!check_recording_time(ost) ||
 553         ost->frame_number >= ost->max_frames)
 554         return;
 555
 556     if (s->oformat->flags & AVFMT_RAWPICTURE &&
 557         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
 558         /* raw pictures are written as AVPicture structure to
 559            avoid any copies. We support temporarily the older
 560            method. */
 561         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
 562         enc->coded_frame->top_field_first  = in_picture->top_field_first;
 563         pkt.data   = (uint8_t *)in_picture;
 564         pkt.size   =  sizeof(AVPicture);
 565         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
 566         pkt.flags |= AV_PKT_FLAG_KEY;
 567
 568         write_frame(s, &pkt, ost);
 569     } else {
 570         int got_packet;
 571         AVFrame big_picture;
 572
 573         big_picture = *in_picture;
 574         /* better than nothing: use input picture interlaced
 575            settings */
 576         big_picture.interlaced_frame = in_picture->interlaced_frame;
 577         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
 578             if (ost->top_field_first == -1)
 579                 big_picture.top_field_first = in_picture->top_field_first;
 580             else
 581                 big_picture.top_field_first = !!ost->top_field_first;
 582         }
 583
 584         /* handles same_quant here. This is not correct because it may
 585            not be a global option */
 586         big_picture.quality = quality;
 587         if (!enc->me_threshold)
 588             big_picture.pict_type = 0;
 589         if (ost->forced_kf_index < ost->forced_kf_count &&
 590             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
 591             big_picture.pict_type = AV_PICTURE_TYPE_I;
 592             ost->forced_kf_index++;
 593         }
 594         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
 595         if (ret < 0) {
 596             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
 597             exit_program(1);
 598         }
 599
 600         if (got_packet) {
 601             if (pkt.pts != AV_NOPTS_VALUE)
 602                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
 603             if (pkt.dts != AV_NOPTS_VALUE)
 604                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
 605
 606             write_frame(s, &pkt, ost);
 607             *frame_size = pkt.size;
 608             video_size += pkt.size;
 609
 610             /* if two pass, output log */
 611             if (ost->logfile && enc->stats_out) {
 612                 fprintf(ost->logfile, "%s", enc->stats_out);
 613             }
 614         }
 615     }
 616     ost->sync_opts++;
 617     /*
 618      * For video, number of frames in == number of packets out.
 619      * But there may be reordering, so we can't throw away frames on encoder
 620      * flush, we need to limit them here, before they go into encoder.
 621      */
 622     ost->frame_number++;
 623 }
 624
 625 static double psnr(double d)
 626 {
 627     return -10.0 * log(d) / log(10.0);
 628 }
 629
 630 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
 631                            int frame_size)
 632 {
 633     AVCodecContext *enc;
 634     int frame_number;
 635     double ti1, bitrate, avg_bitrate;
 636
 637     /* this is executed just the first time do_video_stats is called */
 638     if (!vstats_file) {
 639         vstats_file = fopen(vstats_filename, "w");
 640         if (!vstats_file) {
 641             perror("fopen");
 642             exit_program(1);
 643         }
 644     }
 645
 646     enc = ost->st->codec;
 647     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
 648         frame_number = ost->frame_number;
 649         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
 650         if (enc->flags&CODEC_FLAG_PSNR)
 651             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
 652
 653         fprintf(vstats_file,"f_size= %6d ", frame_size);
 654         /* compute pts value */
 655         ti1 = ost->sync_opts * av_q2d(enc->time_base);
 656         if (ti1 < 0.01)
 657             ti1 = 0.01;
 658
 659         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
 660         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
 661         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
 662                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
 663         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
 664     }
 665 }
 666
 667 /**
 668  * Read one frame for lavfi output for ost and encode it.
 669  */
 670 static int poll_filter(OutputStream *ost)
 671 {
 672     OutputFile    *of = output_files[ost->file_index];
 673     AVFilterBufferRef *picref;
 674     AVFrame *filtered_frame = NULL;
 675     int frame_size, ret;
 676
 677     if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
 678         return AVERROR(ENOMEM);
 679     } else
 680         avcodec_get_frame_defaults(ost->filtered_frame);
 681     filtered_frame = ost->filtered_frame;
 682
 683     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
 684         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
 685         ret = av_buffersink_read_samples(ost->filter->filter, &picref,
 686                                          ost->st->codec->frame_size);
 687     else
 688         ret = av_buffersink_read(ost->filter->filter, &picref);
 689
 690     if (ret < 0)
 691         return ret;
 692
 693     avfilter_copy_buf_props(filtered_frame, picref);
 694     if (picref->pts != AV_NOPTS_VALUE) {
 695         filtered_frame->pts = av_rescale_q(picref->pts,
 696                                            ost->filter->filter->inputs[0]->time_base,
 697                                            ost->st->codec->time_base) -
 698                               av_rescale_q(of->start_time,
 699                                            AV_TIME_BASE_Q,
 700                                            ost->st->codec->time_base);
 701
 702         if (of->start_time && filtered_frame->pts < 0) {
 703             avfilter_unref_buffer(picref);
 704             return 0;
 705         }
 706     }
 707
 708     switch (ost->filter->filter->inputs[0]->type) {
 709     case AVMEDIA_TYPE_VIDEO:
 710         if (!ost->frame_aspect_ratio)
 711             ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
 712
 713         do_video_out(of->ctx, ost, filtered_frame, &frame_size,
 714                      same_quant ? ost->last_quality :
 715                                   ost->st->codec->global_quality);
 716         if (vstats_filename && frame_size)
 717             do_video_stats(of->ctx, ost, frame_size);
 718         break;
 719     case AVMEDIA_TYPE_AUDIO:
 720         do_audio_out(of->ctx, ost, filtered_frame);
 721         break;
 722     default:
 723         // TODO support subtitle filters
 724         av_assert0(0);
 725     }
 726
 727     avfilter_unref_buffer(picref);
 728
 729     return 0;
 730 }
 731
 732 /**
 733  * Read as many frames from possible from lavfi and encode them.
 734  *
 735  * Always read from the active stream with the lowest timestamp. If no frames
 736  * are available for it then return EAGAIN and wait for more input. This way we
 737  * can use lavfi sources that generate unlimited amount of frames without memory
 738  * usage exploding.
 739  */
 740 static int poll_filters(void)
 741 {
 742     int i, j, ret = 0;
 743
 744     while (ret >= 0 && !received_sigterm) {
 745         OutputStream *ost = NULL;
 746         int64_t min_pts = INT64_MAX;
 747
 748         /* choose output stream with the lowest timestamp */
 749         for (i = 0; i < nb_output_streams; i++) {
 750             int64_t pts = output_streams[i]->sync_opts;
 751
 752             if (!output_streams[i]->filter || output_streams[i]->finished)
 753                 continue;
 754
 755             pts = av_rescale_q(pts, output_streams[i]->st->codec->time_base,
 756                                AV_TIME_BASE_Q);
 757             if (pts < min_pts) {
 758                 min_pts = pts;
 759                 ost = output_streams[i];
 760             }
 761         }
 762
 763         if (!ost)
 764             break;
 765
 766         ret = poll_filter(ost);
 767
 768         if (ret == AVERROR_EOF) {
 769             OutputFile *of = output_files[ost->file_index];
 770
 771             ost->finished = 1;
 772
 773             if (of->shortest) {
 774                 for (j = 0; j < of->ctx->nb_streams; j++)
 775                     output_streams[of->ost_index + j]->finished = 1;
 776             }
 777
 778             ret = 0;
 779         } else if (ret == AVERROR(EAGAIN))
 780             return 0;
 781     }
 782
 783     return ret;
 784 }
 785
 786 static void print_report(int is_last_report, int64_t timer_start)
 787 {
 788     char buf[1024];
 789     OutputStream *ost;
 790     AVFormatContext *oc;
 791     int64_t total_size;
 792     AVCodecContext *enc;
 793     int frame_number, vid, i;
 794     double bitrate, ti1, pts;
 795     static int64_t last_time = -1;
 796     static int qp_histogram[52];
 797
 798     if (!print_stats && !is_last_report)
 799         return;
 800
 801     if (!is_last_report) {
 802         int64_t cur_time;
 803         /* display the report every 0.5 seconds */
 804         cur_time = av_gettime();
 805         if (last_time == -1) {
 806             last_time = cur_time;
 807             return;
 808         }
 809         if ((cur_time - last_time) < 500000)
 810             return;
 811         last_time = cur_time;
 812     }
 813
 814
 815     oc = output_files[0]->ctx;
 816
 817     total_size = avio_size(oc->pb);
 818     if (total_size < 0) // FIXME improve avio_size() so it works with non seekable output too
 819         total_size = avio_tell(oc->pb);
 820
 821     buf[0] = '\0';
 822     ti1 = 1e10;
 823     vid = 0;
 824     for (i = 0; i < nb_output_streams; i++) {
 825         float q = -1;
 826         ost = output_streams[i];
 827         enc = ost->st->codec;
 828         if (!ost->stream_copy && enc->coded_frame)
 829             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
 830         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
 831             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
 832         }
 833         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
 834             float t = (av_gettime() - timer_start) / 1000000.0;
 835
 836             frame_number = ost->frame_number;
 837             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
 838                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
 839             if (is_last_report)
 840                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
 841             if (qp_hist) {
 842                 int j;
 843                 int qp = lrintf(q);
 844                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
 845                     qp_histogram[qp]++;
 846                 for (j = 0; j < 32; j++)
 847                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
 848             }
 849             if (enc->flags&CODEC_FLAG_PSNR) {
 850                 int j;
 851                 double error, error_sum = 0;
 852                 double scale, scale_sum = 0;
 853                 char type[3] = { 'Y','U','V' };
 854                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
 855                 for (j = 0; j < 3; j++) {
 856                     if (is_last_report) {
 857                         error = enc->error[j];
 858                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
 859                     } else {
 860                         error = enc->coded_frame->error[j];
 861                         scale = enc->width * enc->height * 255.0 * 255.0;
 862                     }
 863                     if (j)
 864                         scale /= 4;
 865                     error_sum += error;
 866                     scale_sum += scale;
 867                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
 868                 }
 869                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
 870             }
 871             vid = 1;
 872         }
 873         /* compute min output value */
 874         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
 875         if ((pts < ti1) && (pts > 0))
 876             ti1 = pts;
 877     }
 878     if (ti1 < 0.01)
 879         ti1 = 0.01;
 880
 881     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
 882
 883     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 884             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
 885             (double)total_size / 1024, ti1, bitrate);
 886
 887     if (nb_frames_dup || nb_frames_drop)
 888         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
 889                 nb_frames_dup, nb_frames_drop);
 890
 891     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
 892
 893     fflush(stderr);
 894
 895     if (is_last_report) {
 896         int64_t raw= audio_size + video_size + extra_size;
 897         av_log(NULL, AV_LOG_INFO, "\n");
 898         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
 899                video_size / 1024.0,
 900                audio_size / 1024.0,
 901                extra_size / 1024.0,
 902                100.0 * (total_size - raw) / raw
 903         );
 904     }
 905 }
 906
 907 static void flush_encoders(void)
 908 {
 909     int i, ret;
 910
 911     for (i = 0; i < nb_output_streams; i++) {
 912         OutputStream   *ost = output_streams[i];
 913         AVCodecContext *enc = ost->st->codec;
 914         AVFormatContext *os = output_files[ost->file_index]->ctx;
 915         int stop_encoding = 0;
 916
 917         if (!ost->encoding_needed)
 918             continue;
 919
 920         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
 921             continue;
 922         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
 923             continue;
 924
 925         for (;;) {
 926             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
 927             const char *desc;
 928             int64_t *size;
 929
 930             switch (ost->st->codec->codec_type) {
 931             case AVMEDIA_TYPE_AUDIO:
 932                 encode = avcodec_encode_audio2;
 933                 desc   = "Audio";
 934                 size   = &audio_size;
 935                 break;
 936             case AVMEDIA_TYPE_VIDEO:
 937                 encode = avcodec_encode_video2;
 938                 desc   = "Video";
 939                 size   = &video_size;
 940                 break;
 941             default:
 942                 stop_encoding = 1;
 943             }
 944
 945             if (encode) {
 946                 AVPacket pkt;
 947                 int got_packet;
 948                 av_init_packet(&pkt);
 949                 pkt.data = NULL;
 950                 pkt.size = 0;
 951
 952                 ret = encode(enc, &pkt, NULL, &got_packet);
 953                 if (ret < 0) {
 954                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
 955                     exit_program(1);
 956                 }
 957                 *size += ret;
 958                 if (ost->logfile && enc->stats_out) {
 959                     fprintf(ost->logfile, "%s", enc->stats_out);
 960                 }
 961                 if (!got_packet) {
 962                     stop_encoding = 1;
 963                     break;
 964                 }
 965                 if (pkt.pts != AV_NOPTS_VALUE)
 966                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
 967                 if (pkt.dts != AV_NOPTS_VALUE)
 968                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
 969                 write_frame(os, &pkt, ost);
 970             }
 971
 972             if (stop_encoding)
 973                 break;
 974         }
 975     }
 976 }
 977
 978 /*
 979  * Check whether a packet from ist should be written into ost at this time
 980  */
 981 static int check_output_constraints(InputStream *ist, OutputStream *ost)
 982 {
 983     OutputFile *of = output_files[ost->file_index];
 984     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
 985
 986     if (ost->source_index != ist_index)
 987         return 0;
 988
 989     if (of->start_time && ist->last_dts < of->start_time)
 990         return 0;
 991
 992     return 1;
 993 }
 994
 995 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
 996 {
 997     OutputFile *of = output_files[ost->file_index];
 998     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
 999     AVPacket opkt;
1000
1001     av_init_packet(&opkt);
1002
1003     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1004         !ost->copy_initial_nonkeyframes)
1005         return;
1006
1007     if (of->recording_time != INT64_MAX &&
1008         ist->last_dts >= of->recording_time + of->start_time) {
1009         ost->finished = 1;
1010         return;
1011     }
1012
1013     /* force the input stream PTS */
1014     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1015         audio_size += pkt->size;
1016     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1017         video_size += pkt->size;
1018         ost->sync_opts++;
1019     }
1020
1021     if (pkt->pts != AV_NOPTS_VALUE)
1022         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1023     else
1024         opkt.pts = AV_NOPTS_VALUE;
1025
1026     if (pkt->dts == AV_NOPTS_VALUE)
1027         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
1028     else
1029         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1030     opkt.dts -= ost_tb_start_time;
1031
1032     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1033     opkt.flags    = pkt->flags;
1034
1035     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1036     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1037        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1038        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1039        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1040        ) {
1041         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1042             opkt.destruct = av_destruct_packet;
1043     } else {
1044         opkt.data = pkt->data;
1045         opkt.size = pkt->size;
1046     }
1047
1048     write_frame(of->ctx, &opkt, ost);
1049     ost->st->codec->frame_number++;
1050     av_free_packet(&opkt);
1051 }
1052
1053 static void rate_emu_sleep(InputStream *ist)
1054 {
1055     if (input_files[ist->file_index]->rate_emu) {
1056         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
1057         int64_t now = av_gettime() - ist->start;
1058         if (pts > now)
1059             av_usleep(pts - now);
1060     }
1061 }
1062
1063 int guess_input_channel_layout(InputStream *ist)
1064 {
1065     AVCodecContext *dec = ist->st->codec;
1066
1067     if (!dec->channel_layout) {
1068         char layout_name[256];
1069
1070         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1071         if (!dec->channel_layout)
1072             return 0;
1073         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1074                                      dec->channels, dec->channel_layout);
1075         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1076                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1077     }
1078     return 1;
1079 }
1080
1081 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1082 {
1083     AVFrame *decoded_frame;
1084     AVCodecContext *avctx = ist->st->codec;
1085     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
1086     int i, ret, resample_changed;
1087
1088     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1089         return AVERROR(ENOMEM);
1090     else
1091         avcodec_get_frame_defaults(ist->decoded_frame);
1092     decoded_frame = ist->decoded_frame;
1093
1094     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1095     if (!*got_output || ret < 0) {
1096         if (!pkt->size) {
1097             for (i = 0; i < ist->nb_filters; i++)
1098                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1099         }
1100         return ret;
1101     }
1102
1103     /* if the decoder provides a pts, use it instead of the last packet pts.
1104        the decoder could be delaying output by a packet or more. */
1105     if (decoded_frame->pts != AV_NOPTS_VALUE)
1106         ist->next_dts = decoded_frame->pts;
1107     else if (pkt->pts != AV_NOPTS_VALUE) {
1108         decoded_frame->pts = pkt->pts;
1109         pkt->pts           = AV_NOPTS_VALUE;
1110     }
1111
1112     // preprocess audio (volume)
1113     if (audio_volume != 256) {
1114         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
1115         void *samples = decoded_frame->data[0];
1116         switch (avctx->sample_fmt) {
1117         case AV_SAMPLE_FMT_U8:
1118         {
1119             uint8_t *volp = samples;
1120             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1121                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
1122                 *volp++ = av_clip_uint8(v);
1123             }
1124             break;
1125         }
1126         case AV_SAMPLE_FMT_S16:
1127         {
1128             int16_t *volp = samples;
1129             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1130                 int v = ((*volp) * audio_volume + 128) >> 8;
1131                 *volp++ = av_clip_int16(v);
1132             }
1133             break;
1134         }
1135         case AV_SAMPLE_FMT_S32:
1136         {
1137             int32_t *volp = samples;
1138             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1139                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
1140                 *volp++ = av_clipl_int32(v);
1141             }
1142             break;
1143         }
1144         case AV_SAMPLE_FMT_FLT:
1145         {
1146             float *volp = samples;
1147             float scale = audio_volume / 256.f;
1148             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1149                 *volp++ *= scale;
1150             }
1151             break;
1152         }
1153         case AV_SAMPLE_FMT_DBL:
1154         {
1155             double *volp = samples;
1156             double scale = audio_volume / 256.;
1157             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
1158                 *volp++ *= scale;
1159             }
1160             break;
1161         }
1162         default:
1163             av_log(NULL, AV_LOG_FATAL,
1164                    "Audio volume adjustment on sample format %s is not supported.\n",
1165                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
1166             exit_program(1);
1167         }
1168     }
1169
1170     rate_emu_sleep(ist);
1171
1172     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1173                        ist->resample_channels       != avctx->channels               ||
1174                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1175                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1176     if (resample_changed) {
1177         char layout1[64], layout2[64];
1178
1179         if (!guess_input_channel_layout(ist)) {
1180             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1181                    "layout for Input Stream #%d.%d\n", ist->file_index,
1182                    ist->st->index);
1183             exit_program(1);
1184         }
1185         decoded_frame->channel_layout = avctx->channel_layout;
1186
1187         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1188                                      ist->resample_channel_layout);
1189         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1190                                      decoded_frame->channel_layout);
1191
1192         av_log(NULL, AV_LOG_INFO,
1193                "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",
1194                ist->file_index, ist->st->index,
1195                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1196                ist->resample_channels, layout1,
1197                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1198                avctx->channels, layout2);
1199
1200         ist->resample_sample_fmt     = decoded_frame->format;
1201         ist->resample_sample_rate    = decoded_frame->sample_rate;
1202         ist->resample_channel_layout = decoded_frame->channel_layout;
1203         ist->resample_channels       = avctx->channels;
1204
1205         for (i = 0; i < nb_filtergraphs; i++)
1206             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1207                 configure_filtergraph(filtergraphs[i]) < 0) {
1208                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1209                 exit_program(1);
1210             }
1211     }
1212
1213     if (decoded_frame->pts != AV_NOPTS_VALUE)
1214         decoded_frame->pts = av_rescale_q(decoded_frame->pts,
1215                                           ist->st->time_base,
1216                                           (AVRational){1, ist->st->codec->sample_rate});
1217     for (i = 0; i < ist->nb_filters; i++)
1218         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1219
1220     return ret;
1221 }
1222
1223 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1224 {
1225     AVFrame *decoded_frame;
1226     void *buffer_to_free = NULL;
1227     int i, ret = 0, resample_changed;
1228     float quality;
1229
1230     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
1231         return AVERROR(ENOMEM);
1232     else
1233         avcodec_get_frame_defaults(ist->decoded_frame);
1234     decoded_frame = ist->decoded_frame;
1235
1236     ret = avcodec_decode_video2(ist->st->codec,
1237                                 decoded_frame, got_output, pkt);
1238     if (!*got_output || ret < 0) {
1239         if (!pkt->size) {
1240             for (i = 0; i < ist->nb_filters; i++)
1241                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
1242         }
1243         return ret;
1244     }
1245
1246     quality = same_quant ? decoded_frame->quality : 0;
1247     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
1248                                            decoded_frame->pkt_dts);
1249     pkt->size = 0;
1250     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
1251
1252     rate_emu_sleep(ist);
1253
1254     if (ist->st->sample_aspect_ratio.num)
1255         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1256
1257     resample_changed = ist->resample_width   != decoded_frame->width  ||
1258                        ist->resample_height  != decoded_frame->height ||
1259                        ist->resample_pix_fmt != decoded_frame->format;
1260     if (resample_changed) {
1261         av_log(NULL, AV_LOG_INFO,
1262                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1263                ist->file_index, ist->st->index,
1264                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1265                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1266
1267         ret = poll_filters();
1268         if (ret < 0 && (ret != AVERROR_EOF && ret != AVERROR(EAGAIN)))
1269             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
1270
1271         ist->resample_width   = decoded_frame->width;
1272         ist->resample_height  = decoded_frame->height;
1273         ist->resample_pix_fmt = decoded_frame->format;
1274
1275         for (i = 0; i < nb_filtergraphs; i++)
1276             if (ist_in_filtergraph(filtergraphs[i], ist) &&
1277                 configure_filtergraph(filtergraphs[i]) < 0) {
1278                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1279                 exit_program(1);
1280             }
1281     }
1282
1283     for (i = 0; i < ist->nb_filters; i++) {
1284         // XXX what an ugly hack
1285         if (ist->filters[i]->graph->nb_outputs == 1)
1286             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
1287
1288         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
1289             FrameBuffer      *buf = decoded_frame->opaque;
1290             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
1291                                         decoded_frame->data, decoded_frame->linesize,
1292                                         AV_PERM_READ | AV_PERM_PRESERVE,
1293                                         ist->st->codec->width, ist->st->codec->height,
1294                                         ist->st->codec->pix_fmt);
1295
1296             avfilter_copy_frame_props(fb, decoded_frame);
1297             fb->buf->priv           = buf;
1298             fb->buf->free           = filter_release_buffer;
1299
1300             buf->refcount++;
1301             av_buffersrc_buffer(ist->filters[i]->filter, fb);
1302         } else
1303             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
1304     }
1305
1306     av_free(buffer_to_free);
1307     return ret;
1308 }
1309
1310 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1311 {
1312     AVSubtitle subtitle;
1313     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1314                                           &subtitle, got_output, pkt);
1315     if (ret < 0)
1316         return ret;
1317     if (!*got_output)
1318         return ret;
1319
1320     rate_emu_sleep(ist);
1321
1322     for (i = 0; i < nb_output_streams; i++) {
1323         OutputStream *ost = output_streams[i];
1324
1325         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1326             continue;
1327
1328         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
1329     }
1330
1331     avsubtitle_free(&subtitle);
1332     return ret;
1333 }
1334
1335 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1336 static int output_packet(InputStream *ist, const AVPacket *pkt)
1337 {
1338     int i;
1339     int got_output;
1340     AVPacket avpkt;
1341
1342     if (ist->next_dts == AV_NOPTS_VALUE)
1343         ist->next_dts = ist->last_dts;
1344
1345     if (pkt == NULL) {
1346         /* EOF handling */
1347         av_init_packet(&avpkt);
1348         avpkt.data = NULL;
1349         avpkt.size = 0;
1350         goto handle_eof;
1351     } else {
1352         avpkt = *pkt;
1353     }
1354
1355     if (pkt->dts != AV_NOPTS_VALUE)
1356         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1357
1358     // while we have more to decode or while the decoder did output something on EOF
1359     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1360         int ret = 0;
1361     handle_eof:
1362
1363         ist->last_dts = ist->next_dts;
1364
1365         if (avpkt.size && avpkt.size != pkt->size) {
1366             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1367                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1368             ist->showed_multi_packet_warning = 1;
1369         }
1370
1371         switch (ist->st->codec->codec_type) {
1372         case AVMEDIA_TYPE_AUDIO:
1373             ret = decode_audio    (ist, &avpkt, &got_output);
1374             break;
1375         case AVMEDIA_TYPE_VIDEO:
1376             ret = decode_video    (ist, &avpkt, &got_output);
1377             if (avpkt.duration)
1378                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1379             else if (ist->st->avg_frame_rate.num)
1380                 ist->next_dts += av_rescale_q(1, av_inv_q(ist->st->avg_frame_rate),
1381                                               AV_TIME_BASE_Q);
1382             else if (ist->st->codec->time_base.num != 0) {
1383                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
1384                                                    ist->st->codec->ticks_per_frame;
1385                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
1386             }
1387             break;
1388         case AVMEDIA_TYPE_SUBTITLE:
1389             ret = transcode_subtitles(ist, &avpkt, &got_output);
1390             break;
1391         default:
1392             return -1;
1393         }
1394
1395         if (ret < 0)
1396             return ret;
1397         // touch data and size only if not EOF
1398         if (pkt) {
1399             avpkt.data += ret;
1400             avpkt.size -= ret;
1401         }
1402         if (!got_output) {
1403             continue;
1404         }
1405     }
1406
1407     /* handle stream copy */
1408     if (!ist->decoding_needed) {
1409         rate_emu_sleep(ist);
1410         ist->last_dts = ist->next_dts;
1411         switch (ist->st->codec->codec_type) {
1412         case AVMEDIA_TYPE_AUDIO:
1413             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
1414                              ist->st->codec->sample_rate;
1415             break;
1416         case AVMEDIA_TYPE_VIDEO:
1417             if (ist->st->codec->time_base.num != 0) {
1418                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
1419                 ist->next_dts += ((int64_t)AV_TIME_BASE *
1420                                   ist->st->codec->time_base.num * ticks) /
1421                                   ist->st->codec->time_base.den;
1422             }
1423             break;
1424         }
1425     }
1426     for (i = 0; pkt && i < nb_output_streams; i++) {
1427         OutputStream *ost = output_streams[i];
1428
1429         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
1430             continue;
1431
1432         do_streamcopy(ist, ost, pkt);
1433     }
1434
1435     return 0;
1436 }
1437
1438 static void print_sdp(void)
1439 {
1440     char sdp[2048];
1441     int i;
1442     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
1443
1444     if (!avc)
1445         exit_program(1);
1446     for (i = 0; i < nb_output_files; i++)
1447         avc[i] = output_files[i]->ctx;
1448
1449     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
1450     printf("SDP:\n%s\n", sdp);
1451     fflush(stdout);
1452     av_freep(&avc);
1453 }
1454
1455 static int init_input_stream(int ist_index, char *error, int error_len)
1456 {
1457     int i;
1458     InputStream *ist = input_streams[ist_index];
1459     if (ist->decoding_needed) {
1460         AVCodec *codec = ist->dec;
1461         if (!codec) {
1462             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
1463                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
1464             return AVERROR(EINVAL);
1465         }
1466
1467         /* update requested sample format for the decoder based on the
1468            corresponding encoder sample format */
1469         for (i = 0; i < nb_output_streams; i++) {
1470             OutputStream *ost = output_streams[i];
1471             if (ost->source_index == ist_index) {
1472                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
1473                 break;
1474             }
1475         }
1476
1477         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
1478             ist->st->codec->get_buffer     = codec_get_buffer;
1479             ist->st->codec->release_buffer = codec_release_buffer;
1480             ist->st->codec->opaque         = &ist->buffer_pool;
1481         }
1482
1483         if (!av_dict_get(ist->opts, "threads", NULL, 0))
1484             av_dict_set(&ist->opts, "threads", "auto", 0);
1485         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
1486             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
1487                     ist->file_index, ist->st->index);
1488             return AVERROR(EINVAL);
1489         }
1490         assert_codec_experimental(ist->st->codec, 0);
1491         assert_avoptions(ist->opts);
1492     }
1493
1494     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;
1495     ist->next_dts = AV_NOPTS_VALUE;
1496     init_pts_correction(&ist->pts_ctx);
1497     ist->is_start = 1;
1498
1499     return 0;
1500 }
1501
1502 static InputStream *get_input_stream(OutputStream *ost)
1503 {
1504     if (ost->source_index >= 0)
1505         return input_streams[ost->source_index];
1506
1507     if (ost->filter) {
1508         FilterGraph *fg = ost->filter->graph;
1509         int i;
1510
1511         for (i = 0; i < fg->nb_inputs; i++)
1512             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
1513                 return fg->inputs[i]->ist;
1514     }
1515
1516     return NULL;
1517 }
1518
1519 static void parse_forced_key_frames(char *kf, OutputStream *ost,
1520                                     AVCodecContext *avctx)
1521 {
1522     char *p;
1523     int n = 1, i;
1524     int64_t t;
1525
1526     for (p = kf; *p; p++)
1527         if (*p == ',')
1528             n++;
1529     ost->forced_kf_count = n;
1530     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
1531     if (!ost->forced_kf_pts) {
1532         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
1533         exit_program(1);
1534     }
1535
1536     p = kf;
1537     for (i = 0; i < n; i++) {
1538         char *next = strchr(p, ',');
1539
1540         if (next)
1541             *next++ = 0;
1542
1543         t = parse_time_or_die("force_key_frames", p, 1);
1544         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
1545
1546         p = next;
1547     }
1548 }
1549
1550 static int transcode_init(void)
1551 {
1552     int ret = 0, i, j, k;
1553     AVFormatContext *oc;
1554     AVCodecContext *codec;
1555     OutputStream *ost;
1556     InputStream *ist;
1557     char error[1024];
1558     int want_sdp = 1;
1559
1560     /* init framerate emulation */
1561     for (i = 0; i < nb_input_files; i++) {
1562         InputFile *ifile = input_files[i];
1563         if (ifile->rate_emu)
1564             for (j = 0; j < ifile->nb_streams; j++)
1565                 input_streams[j + ifile->ist_index]->start = av_gettime();
1566     }
1567
1568     /* output stream init */
1569     for (i = 0; i < nb_output_files; i++) {
1570         oc = output_files[i]->ctx;
1571         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
1572             av_dump_format(oc, i, oc->filename, 1);
1573             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
1574             return AVERROR(EINVAL);
1575         }
1576     }
1577
1578     /* init complex filtergraphs */
1579     for (i = 0; i < nb_filtergraphs; i++)
1580         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
1581             return ret;
1582
1583     /* for each output stream, we compute the right encoding parameters */
1584     for (i = 0; i < nb_output_streams; i++) {
1585         AVCodecContext *icodec = NULL;
1586         ost = output_streams[i];
1587         oc  = output_files[ost->file_index]->ctx;
1588         ist = get_input_stream(ost);
1589
1590         if (ost->attachment_filename)
1591             continue;
1592
1593         codec  = ost->st->codec;
1594
1595         if (ist) {
1596             icodec = ist->st->codec;
1597
1598             ost->st->disposition          = ist->st->disposition;
1599             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
1600             codec->chroma_sample_location = icodec->chroma_sample_location;
1601         }
1602
1603         if (ost->stream_copy) {
1604             uint64_t extra_size;
1605
1606             av_assert0(ist && !ost->filter);
1607
1608             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
1609
1610             if (extra_size > INT_MAX) {
1611                 return AVERROR(EINVAL);
1612             }
1613
1614             /* if stream_copy is selected, no need to decode or encode */
1615             codec->codec_id   = icodec->codec_id;
1616             codec->codec_type = icodec->codec_type;
1617
1618             if (!codec->codec_tag) {
1619                 if (!oc->oformat->codec_tag ||
1620                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
1621                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
1622                     codec->codec_tag = icodec->codec_tag;
1623             }
1624
1625             codec->bit_rate       = icodec->bit_rate;
1626             codec->rc_max_rate    = icodec->rc_max_rate;
1627             codec->rc_buffer_size = icodec->rc_buffer_size;
1628             codec->field_order    = icodec->field_order;
1629             codec->extradata      = av_mallocz(extra_size);
1630             if (!codec->extradata) {
1631                 return AVERROR(ENOMEM);
1632             }
1633             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
1634             codec->extradata_size = icodec->extradata_size;
1635             if (!copy_tb) {
1636                 codec->time_base      = icodec->time_base;
1637                 codec->time_base.num *= icodec->ticks_per_frame;
1638                 av_reduce(&codec->time_base.num, &codec->time_base.den,
1639                           codec->time_base.num, codec->time_base.den, INT_MAX);
1640             } else
1641                 codec->time_base = ist->st->time_base;
1642
1643             switch (codec->codec_type) {
1644             case AVMEDIA_TYPE_AUDIO:
1645                 if (audio_volume != 256) {
1646                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
1647                     exit_program(1);
1648                 }
1649                 codec->channel_layout     = icodec->channel_layout;
1650                 codec->sample_rate        = icodec->sample_rate;
1651                 codec->channels           = icodec->channels;
1652                 codec->frame_size         = icodec->frame_size;
1653                 codec->audio_service_type = icodec->audio_service_type;
1654                 codec->block_align        = icodec->block_align;
1655                 break;
1656             case AVMEDIA_TYPE_VIDEO:
1657                 codec->pix_fmt            = icodec->pix_fmt;
1658                 codec->width              = icodec->width;
1659                 codec->height             = icodec->height;
1660                 codec->has_b_frames       = icodec->has_b_frames;
1661                 if (!codec->sample_aspect_ratio.num) {
1662                     codec->sample_aspect_ratio   =
1663                     ost->st->sample_aspect_ratio =
1664                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
1665                         ist->st->codec->sample_aspect_ratio.num ?
1666                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
1667                 }
1668                 break;
1669             case AVMEDIA_TYPE_SUBTITLE:
1670                 codec->width  = icodec->width;
1671                 codec->height = icodec->height;
1672                 break;
1673             case AVMEDIA_TYPE_DATA:
1674             case AVMEDIA_TYPE_ATTACHMENT:
1675                 break;
1676             default:
1677                 abort();
1678             }
1679         } else {
1680             if (!ost->enc) {
1681                 /* should only happen when a default codec is not present. */
1682                 snprintf(error, sizeof(error), "Automatic encoder selection "
1683                          "failed for output stream #%d:%d. Default encoder for "
1684                          "format %s is probably disabled. Please choose an "
1685                          "encoder manually.\n", ost->file_index, ost->index,
1686                          oc->oformat->name);
1687                 ret = AVERROR(EINVAL);
1688                 goto dump_format;
1689             }
1690
1691             if (ist)
1692                 ist->decoding_needed = 1;
1693             ost->encoding_needed = 1;
1694
1695             /*
1696              * We want CFR output if and only if one of those is true:
1697              * 1) user specified output framerate with -r
1698              * 2) user specified -vsync cfr
1699              * 3) output format is CFR and the user didn't force vsync to
1700              *    something else than CFR
1701              *
1702              * in such a case, set ost->frame_rate
1703              */
1704             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1705                 !ost->frame_rate.num && ist &&
1706                 (video_sync_method ==  VSYNC_CFR ||
1707                  (video_sync_method ==  VSYNC_AUTO &&
1708                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
1709                 ost->frame_rate = ist->framerate.num ? ist->framerate :
1710                                   ist->st->avg_frame_rate.num ?
1711                                   ist->st->avg_frame_rate :
1712                                   (AVRational){25, 1};
1713
1714                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
1715                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
1716                     ost->frame_rate = ost->enc->supported_framerates[idx];
1717                 }
1718             }
1719
1720             if (!ost->filter &&
1721                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
1722                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
1723                     FilterGraph *fg;
1724                     fg = init_simple_filtergraph(ist, ost);
1725                     if (configure_filtergraph(fg)) {
1726                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
1727                         exit(1);
1728                     }
1729             }
1730
1731             switch (codec->codec_type) {
1732             case AVMEDIA_TYPE_AUDIO:
1733                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
1734                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
1735                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
1736                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
1737                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
1738                 break;
1739             case AVMEDIA_TYPE_VIDEO:
1740                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
1741
1742                 codec->width  = ost->filter->filter->inputs[0]->w;
1743                 codec->height = ost->filter->filter->inputs[0]->h;
1744                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
1745                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
1746                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
1747                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
1748                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
1749
1750                 if (icodec &&
1751                     (codec->width   != icodec->width  ||
1752                      codec->height  != icodec->height ||
1753                      codec->pix_fmt != icodec->pix_fmt)) {
1754                     codec->bits_per_raw_sample = 0;
1755                 }
1756
1757                 if (ost->forced_keyframes)
1758                     parse_forced_key_frames(ost->forced_keyframes, ost,
1759                                             ost->st->codec);
1760                 break;
1761             case AVMEDIA_TYPE_SUBTITLE:
1762                 codec->time_base = (AVRational){1, 1000};
1763                 break;
1764             default:
1765                 abort();
1766                 break;
1767             }
1768             /* two pass mode */
1769             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
1770                 char logfilename[1024];
1771                 FILE *f;
1772
1773                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
1774                          ost->logfile_prefix ? ost->logfile_prefix :
1775                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
1776                          i);
1777                 if (!strcmp(ost->enc->name, "libx264")) {
1778                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
1779                 } else {
1780                     if (codec->flags & CODEC_FLAG_PASS1) {
1781                         f = fopen(logfilename, "wb");
1782                         if (!f) {
1783                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
1784                                    logfilename, strerror(errno));
1785                             exit_program(1);
1786                         }
1787                         ost->logfile = f;
1788                     } else {
1789                         char  *logbuffer;
1790                         size_t logbuffer_size;
1791                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
1792                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
1793                                    logfilename);
1794                             exit_program(1);
1795                         }
1796                         codec->stats_in = logbuffer;
1797                     }
1798                 }
1799             }
1800         }
1801     }
1802
1803     /* open each encoder */
1804     for (i = 0; i < nb_output_streams; i++) {
1805         ost = output_streams[i];
1806         if (ost->encoding_needed) {
1807             AVCodec      *codec = ost->enc;
1808             AVCodecContext *dec = NULL;
1809
1810             if ((ist = get_input_stream(ost)))
1811                 dec = ist->st->codec;
1812             if (dec && dec->subtitle_header) {
1813                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
1814                 if (!ost->st->codec->subtitle_header) {
1815                     ret = AVERROR(ENOMEM);
1816                     goto dump_format;
1817                 }
1818                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
1819                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
1820             }
1821             if (!av_dict_get(ost->opts, "threads", NULL, 0))
1822                 av_dict_set(&ost->opts, "threads", "auto", 0);
1823             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
1824                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
1825                         ost->file_index, ost->index);
1826                 ret = AVERROR(EINVAL);
1827                 goto dump_format;
1828             }
1829             assert_codec_experimental(ost->st->codec, 1);
1830             assert_avoptions(ost->opts);
1831             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
1832                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
1833                                              "It takes bits/s as argument, not kbits/s\n");
1834             extra_size += ost->st->codec->extradata_size;
1835
1836             if (ost->st->codec->me_threshold)
1837                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
1838         }
1839     }
1840
1841     /* init input streams */
1842     for (i = 0; i < nb_input_streams; i++)
1843         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
1844             goto dump_format;
1845
1846     /* discard unused programs */
1847     for (i = 0; i < nb_input_files; i++) {
1848         InputFile *ifile = input_files[i];
1849         for (j = 0; j < ifile->ctx->nb_programs; j++) {
1850             AVProgram *p = ifile->ctx->programs[j];
1851             int discard  = AVDISCARD_ALL;
1852
1853             for (k = 0; k < p->nb_stream_indexes; k++)
1854                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
1855                     discard = AVDISCARD_DEFAULT;
1856                     break;
1857                 }
1858             p->discard = discard;
1859         }
1860     }
1861
1862     /* open files and write file headers */
1863     for (i = 0; i < nb_output_files; i++) {
1864         oc = output_files[i]->ctx;
1865         oc->interrupt_callback = int_cb;
1866         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
1867             char errbuf[128];
1868             const char *errbuf_ptr = errbuf;
1869             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
1870                 errbuf_ptr = strerror(AVUNERROR(ret));
1871             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
1872             ret = AVERROR(EINVAL);
1873             goto dump_format;
1874         }
1875         assert_avoptions(output_files[i]->opts);
1876         if (strcmp(oc->oformat->name, "rtp")) {
1877             want_sdp = 0;
1878         }
1879     }
1880
1881  dump_format:
1882     /* dump the file output parameters - cannot be done before in case
1883        of stream copy */
1884     for (i = 0; i < nb_output_files; i++) {
1885         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
1886     }
1887
1888     /* dump the stream mapping */
1889     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
1890     for (i = 0; i < nb_input_streams; i++) {
1891         ist = input_streams[i];
1892
1893         for (j = 0; j < ist->nb_filters; j++) {
1894             if (ist->filters[j]->graph->graph_desc) {
1895                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
1896                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
1897                        ist->filters[j]->name);
1898                 if (nb_filtergraphs > 1)
1899                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
1900                 av_log(NULL, AV_LOG_INFO, "\n");
1901             }
1902         }
1903     }
1904
1905     for (i = 0; i < nb_output_streams; i++) {
1906         ost = output_streams[i];
1907
1908         if (ost->attachment_filename) {
1909             /* an attached file */
1910             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
1911                    ost->attachment_filename, ost->file_index, ost->index);
1912             continue;
1913         }
1914
1915         if (ost->filter && ost->filter->graph->graph_desc) {
1916             /* output from a complex graph */
1917             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
1918             if (nb_filtergraphs > 1)
1919                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
1920
1921             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
1922                    ost->index, ost->enc ? ost->enc->name : "?");
1923             continue;
1924         }
1925
1926         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
1927                input_streams[ost->source_index]->file_index,
1928                input_streams[ost->source_index]->st->index,
1929                ost->file_index,
1930                ost->index);
1931         if (ost->sync_ist != input_streams[ost->source_index])
1932             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
1933                    ost->sync_ist->file_index,
1934                    ost->sync_ist->st->index);
1935         if (ost->stream_copy)
1936             av_log(NULL, AV_LOG_INFO, " (copy)");
1937         else
1938             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
1939                    input_streams[ost->source_index]->dec->name : "?",
1940                    ost->enc ? ost->enc->name : "?");
1941         av_log(NULL, AV_LOG_INFO, "\n");
1942     }
1943
1944     if (ret) {
1945         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
1946         return ret;
1947     }
1948
1949     if (want_sdp) {
1950         print_sdp();
1951     }
1952
1953     return 0;
1954 }
1955
1956 /**
1957  * @return 1 if there are still streams where more output is wanted,
1958  *         0 otherwise
1959  */
1960 static int need_output(void)
1961 {
1962     int i;
1963
1964     for (i = 0; i < nb_output_streams; i++) {
1965         OutputStream *ost    = output_streams[i];
1966         OutputFile *of       = output_files[ost->file_index];
1967         AVFormatContext *os  = output_files[ost->file_index]->ctx;
1968
1969         if (ost->finished ||
1970             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
1971             continue;
1972         if (ost->frame_number >= ost->max_frames) {
1973             int j;
1974             for (j = 0; j < of->ctx->nb_streams; j++)
1975                 output_streams[of->ost_index + j]->finished = 1;
1976             continue;
1977         }
1978
1979         return 1;
1980     }
1981
1982     return 0;
1983 }
1984
1985 static InputFile *select_input_file(void)
1986 {
1987     InputFile *ifile = NULL;
1988     int64_t ipts_min = INT64_MAX;
1989     int i;
1990
1991     for (i = 0; i < nb_input_streams; i++) {
1992         InputStream *ist = input_streams[i];
1993         int64_t ipts     = ist->last_dts;
1994
1995         if (ist->discard || input_files[ist->file_index]->eagain)
1996             continue;
1997         if (!input_files[ist->file_index]->eof_reached) {
1998             if (ipts < ipts_min) {
1999                 ipts_min = ipts;
2000                 ifile    = input_files[ist->file_index];
2001             }
2002         }
2003     }
2004
2005     return ifile;
2006 }
2007
2008 #if HAVE_PTHREADS
2009 static void *input_thread(void *arg)
2010 {
2011     InputFile *f = arg;
2012     int ret = 0;
2013
2014     while (!transcoding_finished && ret >= 0) {
2015         AVPacket pkt;
2016         ret = av_read_frame(f->ctx, &pkt);
2017
2018         if (ret == AVERROR(EAGAIN)) {
2019             av_usleep(10000);
2020             ret = 0;
2021             continue;
2022         } else if (ret < 0)
2023             break;
2024
2025         pthread_mutex_lock(&f->fifo_lock);
2026         while (!av_fifo_space(f->fifo))
2027             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2028
2029         av_dup_packet(&pkt);
2030         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2031
2032         pthread_mutex_unlock(&f->fifo_lock);
2033     }
2034
2035     f->finished = 1;
2036     return NULL;
2037 }
2038
2039 static void free_input_threads(void)
2040 {
2041     int i;
2042
2043     if (nb_input_files == 1)
2044         return;
2045
2046     transcoding_finished = 1;
2047
2048     for (i = 0; i < nb_input_files; i++) {
2049         InputFile *f = input_files[i];
2050         AVPacket pkt;
2051
2052         if (!f->fifo || f->joined)
2053             continue;
2054
2055         pthread_mutex_lock(&f->fifo_lock);
2056         while (av_fifo_size(f->fifo)) {
2057             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2058             av_free_packet(&pkt);
2059         }
2060         pthread_cond_signal(&f->fifo_cond);
2061         pthread_mutex_unlock(&f->fifo_lock);
2062
2063         pthread_join(f->thread, NULL);
2064         f->joined = 1;
2065
2066         while (av_fifo_size(f->fifo)) {
2067             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2068             av_free_packet(&pkt);
2069         }
2070         av_fifo_free(f->fifo);
2071     }
2072 }
2073
2074 static int init_input_threads(void)
2075 {
2076     int i, ret;
2077
2078     if (nb_input_files == 1)
2079         return 0;
2080
2081     for (i = 0; i < nb_input_files; i++) {
2082         InputFile *f = input_files[i];
2083
2084         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
2085             return AVERROR(ENOMEM);
2086
2087         pthread_mutex_init(&f->fifo_lock, NULL);
2088         pthread_cond_init (&f->fifo_cond, NULL);
2089
2090         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
2091             return AVERROR(ret);
2092     }
2093     return 0;
2094 }
2095
2096 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
2097 {
2098     int ret = 0;
2099
2100     pthread_mutex_lock(&f->fifo_lock);
2101
2102     if (av_fifo_size(f->fifo)) {
2103         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
2104         pthread_cond_signal(&f->fifo_cond);
2105     } else {
2106         if (f->finished)
2107             ret = AVERROR_EOF;
2108         else
2109             ret = AVERROR(EAGAIN);
2110     }
2111
2112     pthread_mutex_unlock(&f->fifo_lock);
2113
2114     return ret;
2115 }
2116 #endif
2117
2118 static int get_input_packet(InputFile *f, AVPacket *pkt)
2119 {
2120 #if HAVE_PTHREADS
2121     if (nb_input_files > 1)
2122         return get_input_packet_mt(f, pkt);
2123 #endif
2124     return av_read_frame(f->ctx, pkt);
2125 }
2126
2127 static int got_eagain(void)
2128 {
2129     int i;
2130     for (i = 0; i < nb_input_files; i++)
2131         if (input_files[i]->eagain)
2132             return 1;
2133     return 0;
2134 }
2135
2136 static void reset_eagain(void)
2137 {
2138     int i;
2139     for (i = 0; i < nb_input_files; i++)
2140         input_files[i]->eagain = 0;
2141 }
2142
2143 /**
2144  * Read one packet from an input file and send it for
2145  * - decoding -> lavfi (audio/video)
2146  * - decoding -> encoding -> muxing (subtitles)
2147  * - muxing (streamcopy)
2148  *
2149  * @return
2150  * - 0 -- one packet was read and processed
2151  * - AVERROR(EAGAIN) -- no packets were available for selected file,
2152  *   this function should be called again
2153  * - AVERROR_EOF -- this function should not be called again
2154  */
2155 static int process_input(void)
2156 {
2157     InputFile *ifile;
2158     AVFormatContext *is;
2159     InputStream *ist;
2160     AVPacket pkt;
2161     int ret, i, j;
2162
2163     /* select the stream that we must read now */
2164     ifile = select_input_file();
2165     /* if none, if is finished */
2166     if (!ifile) {
2167         if (got_eagain()) {
2168             reset_eagain();
2169             av_usleep(10000);
2170             return AVERROR(EAGAIN);
2171         }
2172         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from.\n");
2173         return AVERROR_EOF;
2174     }
2175
2176     is  = ifile->ctx;
2177     ret = get_input_packet(ifile, &pkt);
2178
2179     if (ret == AVERROR(EAGAIN)) {
2180         ifile->eagain = 1;
2181         return ret;
2182     }
2183     if (ret < 0) {
2184         if (ret != AVERROR_EOF) {
2185             print_error(is->filename, ret);
2186             if (exit_on_error)
2187                 exit_program(1);
2188         }
2189         ifile->eof_reached = 1;
2190
2191         for (i = 0; i < ifile->nb_streams; i++) {
2192             ist = input_streams[ifile->ist_index + i];
2193             if (ist->decoding_needed)
2194                 output_packet(ist, NULL);
2195
2196             /* mark all outputs that don't go through lavfi as finished */
2197             for (j = 0; j < nb_output_streams; j++) {
2198                 OutputStream *ost = output_streams[j];
2199
2200                 if (ost->source_index == ifile->ist_index + i &&
2201                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
2202                     ost->finished= 1;
2203             }
2204         }
2205
2206         return AVERROR(EAGAIN);
2207     }
2208
2209     reset_eagain();
2210
2211     if (do_pkt_dump) {
2212         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2213                          is->streams[pkt.stream_index]);
2214     }
2215     /* the following test is needed in case new streams appear
2216        dynamically in stream : we ignore them */
2217     if (pkt.stream_index >= ifile->nb_streams)
2218         goto discard_packet;
2219
2220     ist = input_streams[ifile->ist_index + pkt.stream_index];
2221     if (ist->discard)
2222         goto discard_packet;
2223
2224     if (pkt.dts != AV_NOPTS_VALUE)
2225         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2226     if (pkt.pts != AV_NOPTS_VALUE)
2227         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2228
2229     if (pkt.pts != AV_NOPTS_VALUE)
2230         pkt.pts *= ist->ts_scale;
2231     if (pkt.dts != AV_NOPTS_VALUE)
2232         pkt.dts *= ist->ts_scale;
2233
2234     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
2235         (is->iformat->flags & AVFMT_TS_DISCONT)) {
2236         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2237         int64_t delta   = pkt_dts - ist->next_dts;
2238
2239         if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
2240             ifile->ts_offset -= delta;
2241             av_log(NULL, AV_LOG_DEBUG,
2242                    "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2243                    delta, ifile->ts_offset);
2244             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2245             if (pkt.pts != AV_NOPTS_VALUE)
2246                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
2247         }
2248     }
2249
2250     ret = output_packet(ist, &pkt);
2251     if (ret < 0) {
2252         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
2253                ist->file_index, ist->st->index);
2254         if (exit_on_error)
2255             exit_program(1);
2256     }
2257
2258 discard_packet:
2259     av_free_packet(&pkt);
2260
2261     return 0;
2262 }
2263
2264 /*
2265  * The following code is the main loop of the file converter
2266  */
2267 static int transcode(void)
2268 {
2269     int ret, i, need_input = 1;
2270     AVFormatContext *os;
2271     OutputStream *ost;
2272     InputStream *ist;
2273     int64_t timer_start;
2274
2275     ret = transcode_init();
2276     if (ret < 0)
2277         goto fail;
2278
2279     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2280     term_init();
2281
2282     timer_start = av_gettime();
2283
2284 #if HAVE_PTHREADS
2285     if ((ret = init_input_threads()) < 0)
2286         goto fail;
2287 #endif
2288
2289     while (!received_sigterm) {
2290         /* check if there's any stream where output is still needed */
2291         if (!need_output()) {
2292             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
2293             break;
2294         }
2295
2296         /* read and process one input packet if needed */
2297         if (need_input) {
2298             ret = process_input();
2299             if (ret == AVERROR_EOF)
2300                 need_input = 0;
2301         }
2302
2303         ret = poll_filters();
2304         if (ret < 0) {
2305             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
2306                 continue;
2307
2308             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
2309             break;
2310         }
2311
2312         /* dump report by using the output first video and audio streams */
2313         print_report(0, timer_start);
2314     }
2315 #if HAVE_PTHREADS
2316     free_input_threads();
2317 #endif
2318
2319     /* at the end of stream, we must flush the decoder buffers */
2320     for (i = 0; i < nb_input_streams; i++) {
2321         ist = input_streams[i];
2322         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
2323             output_packet(ist, NULL);
2324         }
2325     }
2326     poll_filters();
2327     flush_encoders();
2328
2329     term_exit();
2330
2331     /* write the trailer if needed and close file */
2332     for (i = 0; i < nb_output_files; i++) {
2333         os = output_files[i]->ctx;
2334         av_write_trailer(os);
2335     }
2336
2337     /* dump report by using the first video and audio streams */
2338     print_report(1, timer_start);
2339
2340     /* close each encoder */
2341     for (i = 0; i < nb_output_streams; i++) {
2342         ost = output_streams[i];
2343         if (ost->encoding_needed) {
2344             av_freep(&ost->st->codec->stats_in);
2345             avcodec_close(ost->st->codec);
2346         }
2347     }
2348
2349     /* close each decoder */
2350     for (i = 0; i < nb_input_streams; i++) {
2351         ist = input_streams[i];
2352         if (ist->decoding_needed) {
2353             avcodec_close(ist->st->codec);
2354         }
2355     }
2356
2357     /* finished ! */
2358     ret = 0;
2359
2360  fail:
2361 #if HAVE_PTHREADS
2362     free_input_threads();
2363 #endif
2364
2365     if (output_streams) {
2366         for (i = 0; i < nb_output_streams; i++) {
2367             ost = output_streams[i];
2368             if (ost) {
2369                 if (ost->stream_copy)
2370                     av_freep(&ost->st->codec->extradata);
2371                 if (ost->logfile) {
2372                     fclose(ost->logfile);
2373                     ost->logfile = NULL;
2374                 }
2375                 av_freep(&ost->st->codec->subtitle_header);
2376                 av_free(ost->forced_kf_pts);
2377                 av_dict_free(&ost->opts);
2378             }
2379         }
2380     }
2381     return ret;
2382 }
2383
2384 static int64_t getutime(void)
2385 {
2386 #if HAVE_GETRUSAGE
2387     struct rusage rusage;
2388
2389     getrusage(RUSAGE_SELF, &rusage);
2390     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
2391 #elif HAVE_GETPROCESSTIMES
2392     HANDLE proc;
2393     FILETIME c, e, k, u;
2394     proc = GetCurrentProcess();
2395     GetProcessTimes(proc, &c, &e, &k, &u);
2396     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
2397 #else
2398     return av_gettime();
2399 #endif
2400 }
2401
2402 static int64_t getmaxrss(void)
2403 {
2404 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
2405     struct rusage rusage;
2406     getrusage(RUSAGE_SELF, &rusage);
2407     return (int64_t)rusage.ru_maxrss * 1024;
2408 #elif HAVE_GETPROCESSMEMORYINFO
2409     HANDLE proc;
2410     PROCESS_MEMORY_COUNTERS memcounters;
2411     proc = GetCurrentProcess();
2412     memcounters.cb = sizeof(memcounters);
2413     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
2414     return memcounters.PeakPagefileUsage;
2415 #else
2416     return 0;
2417 #endif
2418 }
2419
2420 static void parse_cpuflags(int argc, char **argv, const OptionDef *options)
2421 {
2422     int idx = locate_option(argc, argv, options, "cpuflags");
2423     if (idx && argv[idx + 1])
2424         opt_cpuflags(NULL, "cpuflags", argv[idx + 1]);
2425 }
2426
2427 int main(int argc, char **argv)
2428 {
2429     OptionsContext o = { 0 };
2430     int64_t ti;
2431
2432     reset_options(&o);
2433
2434     av_log_set_flags(AV_LOG_SKIP_REPEATED);
2435     parse_loglevel(argc, argv, options);
2436
2437     avcodec_register_all();
2438 #if CONFIG_AVDEVICE
2439     avdevice_register_all();
2440 #endif
2441     avfilter_register_all();
2442     av_register_all();
2443     avformat_network_init();
2444
2445     show_banner();
2446
2447     parse_cpuflags(argc, argv, options);
2448
2449     /* parse options */
2450     parse_options(&o, argc, argv, options, opt_output_file);
2451
2452     if (nb_output_files <= 0 && nb_input_files == 0) {
2453         show_usage();
2454         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
2455         exit_program(1);
2456     }
2457
2458     /* file converter / grab */
2459     if (nb_output_files <= 0) {
2460         fprintf(stderr, "At least one output file must be specified\n");
2461         exit_program(1);
2462     }
2463
2464     ti = getutime();
2465     if (transcode() < 0)
2466         exit_program(1);
2467     ti = getutime() - ti;
2468     if (do_benchmark) {
2469         int maxrss = getmaxrss() / 1024;
2470         printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
2471     }
2472
2473     exit_program(0);
2474     return 0;
2475 }