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

   1 /*
   2  * Copyright (c) 2000-2003 Fabrice Bellard
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /**
  22  * @file
  23  * multimedia converter based on the FFmpeg libraries
  24  */
  25
  26 #include "config.h"
  27 #include <ctype.h>
  28 #include <string.h>
  29 #include <math.h>
  30 #include <stdlib.h>
  31 #include <errno.h>
  32 #include <limits.h>
  33 #include <stdint.h>
  34
  35 #if HAVE_ISATTY
  36 #if HAVE_IO_H
  37 #include <io.h>
  38 #endif
  39 #if HAVE_UNISTD_H
  40 #include <unistd.h>
  41 #endif
  42 #endif
  43
  44 #include "libavformat/avformat.h"
  45 #include "libavdevice/avdevice.h"
  46 #include "libswresample/swresample.h"
  47 #include "libavutil/opt.h"
  48 #include "libavutil/channel_layout.h"
  49 #include "libavutil/parseutils.h"
  50 #include "libavutil/samplefmt.h"
  51 #include "libavutil/fifo.h"
  52 #include "libavutil/intreadwrite.h"
  53 #include "libavutil/dict.h"
  54 #include "libavutil/mathematics.h"
  55 #include "libavutil/pixdesc.h"
  56 #include "libavutil/avstring.h"
  57 #include "libavutil/libm.h"
  58 #include "libavutil/imgutils.h"
  59 #include "libavutil/timestamp.h"
  60 #include "libavutil/bprint.h"
  61 #include "libavutil/time.h"
  62 #include "libavformat/os_support.h"
  63
  64 #include "libavformat/ffm.h" // not public API
  65
  66 # include "libavfilter/avcodec.h"
  67 # include "libavfilter/avfilter.h"
  68 # include "libavfilter/buffersrc.h"
  69 # include "libavfilter/buffersink.h"
  70
  71 #if HAVE_SYS_RESOURCE_H
  72 #include <sys/time.h>
  73 #include <sys/types.h>
  74 #include <sys/resource.h>
  75 #elif HAVE_GETPROCESSTIMES
  76 #include <windows.h>
  77 #endif
  78 #if HAVE_GETPROCESSMEMORYINFO
  79 #include <windows.h>
  80 #include <psapi.h>
  81 #endif
  82
  83 #if HAVE_SYS_SELECT_H
  84 #include <sys/select.h>
  85 #endif
  86
  87 #if HAVE_TERMIOS_H
  88 #include <fcntl.h>
  89 #include <sys/ioctl.h>
  90 #include <sys/time.h>
  91 #include <termios.h>
  92 #elif HAVE_KBHIT
  93 #include <conio.h>
  94 #endif
  95
  96 #if HAVE_PTHREADS
  97 #include <pthread.h>
  98 #endif
  99
 100 #include <time.h>
 101
 102 #include "ffmpeg.h"
 103 #include "cmdutils.h"
 104
 105 #include "libavutil/avassert.h"
 106
 107 const char program_name[] = "ffmpeg";
 108 const int program_birth_year = 2000;
 109
 110 static FILE *vstats_file;
 111
 112 const char *const forced_keyframes_const_names[] = {
 113     "n",
 114     "n_forced",
 115     "prev_forced_n",
 116     "prev_forced_t",
 117     "t",
 118     NULL
 119 };
 120
 121 static void do_video_stats(OutputStream *ost, int frame_size);
 122 static int64_t getutime(void);
 123 static int64_t getmaxrss(void);
 124
 125 static int run_as_daemon  = 0;
 126 static int64_t video_size = 0;
 127 static int64_t audio_size = 0;
 128 static int64_t data_size = 0;
 129 static int64_t subtitle_size = 0;
 130 static int64_t extra_size = 0;
 131 static int nb_frames_dup = 0;
 132 static int nb_frames_drop = 0;
 133 static int64_t decode_error_stat[2];
 134
 135 static int current_time;
 136 AVIOContext *progress_avio = NULL;
 137
 138 static uint8_t *subtitle_out;
 139
 140 #if HAVE_PTHREADS
 141 /* signal to input threads that they should exit; set by the main thread */
 142 static int transcoding_finished;
 143 #endif
 144
 145 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
 146
 147 InputStream **input_streams = NULL;
 148 int        nb_input_streams = 0;
 149 InputFile   **input_files   = NULL;
 150 int        nb_input_files   = 0;
 151
 152 OutputStream **output_streams = NULL;
 153 int         nb_output_streams = 0;
 154 OutputFile   **output_files   = NULL;
 155 int         nb_output_files   = 0;
 156
 157 FilterGraph **filtergraphs;
 158 int        nb_filtergraphs;
 159
 160 #if HAVE_TERMIOS_H
 161
 162 /* init terminal so that we can grab keys */
 163 static struct termios oldtty;
 164 static int restore_tty;
 165 #endif
 166
 167 static void free_input_threads(void);
 168
 169
 170 /* sub2video hack:
 171    Convert subtitles to video with alpha to insert them in filter graphs.
 172    This is a temporary solution until libavfilter gets real subtitles support.
 173  */
 174
 175 static int sub2video_get_blank_frame(InputStream *ist)
 176 {
 177     int ret;
 178     AVFrame *frame = ist->sub2video.frame;
 179
 180     av_frame_unref(frame);
 181     ist->sub2video.frame->width  = ist->sub2video.w;
 182     ist->sub2video.frame->height = ist->sub2video.h;
 183     ist->sub2video.frame->format = AV_PIX_FMT_RGB32;
 184     if ((ret = av_frame_get_buffer(frame, 32)) < 0)
 185         return ret;
 186     memset(frame->data[0], 0, frame->height * frame->linesize[0]);
 187     return 0;
 188 }
 189
 190 static void sub2video_copy_rect(uint8_t *dst, int dst_linesize, int w, int h,
 191                                 AVSubtitleRect *r)
 192 {
 193     uint32_t *pal, *dst2;
 194     uint8_t *src, *src2;
 195     int x, y;
 196
 197     if (r->type != SUBTITLE_BITMAP) {
 198         av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n");
 199         return;
 200     }
 201     if (r->x < 0 || r->x + r->w > w || r->y < 0 || r->y + r->h > h) {
 202         av_log(NULL, AV_LOG_WARNING, "sub2video: rectangle overflowing\n");
 203         return;
 204     }
 205
 206     dst += r->y * dst_linesize + r->x * 4;
 207     src = r->pict.data[0];
 208     pal = (uint32_t *)r->pict.data[1];
 209     for (y = 0; y < r->h; y++) {
 210         dst2 = (uint32_t *)dst;
 211         src2 = src;
 212         for (x = 0; x < r->w; x++)
 213             *(dst2++) = pal[*(src2++)];
 214         dst += dst_linesize;
 215         src += r->pict.linesize[0];
 216     }
 217 }
 218
 219 static void sub2video_push_ref(InputStream *ist, int64_t pts)
 220 {
 221     AVFrame *frame = ist->sub2video.frame;
 222     int i;
 223
 224     av_assert1(frame->data[0]);
 225     ist->sub2video.last_pts = frame->pts = pts;
 226     for (i = 0; i < ist->nb_filters; i++)
 227         av_buffersrc_add_frame_flags(ist->filters[i]->filter, frame,
 228                                      AV_BUFFERSRC_FLAG_KEEP_REF |
 229                                      AV_BUFFERSRC_FLAG_PUSH);
 230 }
 231
 232 static void sub2video_update(InputStream *ist, AVSubtitle *sub)
 233 {
 234     int w = ist->sub2video.w, h = ist->sub2video.h;
 235     AVFrame *frame = ist->sub2video.frame;
 236     int8_t *dst;
 237     int     dst_linesize;
 238     int num_rects, i;
 239     int64_t pts, end_pts;
 240
 241     if (!frame)
 242         return;
 243     if (sub) {
 244         pts       = av_rescale_q(sub->pts + sub->start_display_time * 1000,
 245                                  AV_TIME_BASE_Q, ist->st->time_base);
 246         end_pts   = av_rescale_q(sub->pts + sub->end_display_time   * 1000,
 247                                  AV_TIME_BASE_Q, ist->st->time_base);
 248         num_rects = sub->num_rects;
 249     } else {
 250         pts       = ist->sub2video.end_pts;
 251         end_pts   = INT64_MAX;
 252         num_rects = 0;
 253     }
 254     if (sub2video_get_blank_frame(ist) < 0) {
 255         av_log(ist->st->codec, AV_LOG_ERROR,
 256                "Impossible to get a blank canvas.\n");
 257         return;
 258     }
 259     dst          = frame->data    [0];
 260     dst_linesize = frame->linesize[0];
 261     for (i = 0; i < num_rects; i++)
 262         sub2video_copy_rect(dst, dst_linesize, w, h, sub->rects[i]);
 263     sub2video_push_ref(ist, pts);
 264     ist->sub2video.end_pts = end_pts;
 265 }
 266
 267 static void sub2video_heartbeat(InputStream *ist, int64_t pts)
 268 {
 269     InputFile *infile = input_files[ist->file_index];
 270     int i, j, nb_reqs;
 271     int64_t pts2;
 272
 273     /* When a frame is read from a file, examine all sub2video streams in
 274        the same file and send the sub2video frame again. Otherwise, decoded
 275        video frames could be accumulating in the filter graph while a filter
 276        (possibly overlay) is desperately waiting for a subtitle frame. */
 277     for (i = 0; i < infile->nb_streams; i++) {
 278         InputStream *ist2 = input_streams[infile->ist_index + i];
 279         if (!ist2->sub2video.frame)
 280             continue;
 281         /* subtitles seem to be usually muxed ahead of other streams;
 282            if not, substracting a larger time here is necessary */
 283         pts2 = av_rescale_q(pts, ist->st->time_base, ist2->st->time_base) - 1;
 284         /* do not send the heartbeat frame if the subtitle is already ahead */
 285         if (pts2 <= ist2->sub2video.last_pts)
 286             continue;
 287         if (pts2 >= ist2->sub2video.end_pts || !ist2->sub2video.frame->data[0])
 288             sub2video_update(ist2, NULL);
 289         for (j = 0, nb_reqs = 0; j < ist2->nb_filters; j++)
 290             nb_reqs += av_buffersrc_get_nb_failed_requests(ist2->filters[j]->filter);
 291         if (nb_reqs)
 292             sub2video_push_ref(ist2, pts2);
 293     }
 294 }
 295
 296 static void sub2video_flush(InputStream *ist)
 297 {
 298     int i;
 299
 300     for (i = 0; i < ist->nb_filters; i++)
 301         av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
 302 }
 303
 304 /* end of sub2video hack */
 305
 306 void term_exit(void)
 307 {
 308     av_log(NULL, AV_LOG_QUIET, "%s", "");
 309 #if HAVE_TERMIOS_H
 310     if(restore_tty)
 311         tcsetattr (0, TCSANOW, &oldtty);
 312 #endif
 313 }
 314
 315 static volatile int received_sigterm = 0;
 316 static volatile int received_nb_signals = 0;
 317 static int main_return_code = 0;
 318
 319 static void
 320 sigterm_handler(int sig)
 321 {
 322     received_sigterm = sig;
 323     received_nb_signals++;
 324     term_exit();
 325     if(received_nb_signals > 3)
 326         exit_program(123);
 327 }
 328
 329 void term_init(void)
 330 {
 331 #if HAVE_TERMIOS_H
 332     if(!run_as_daemon){
 333         struct termios tty;
 334         int istty = 1;
 335 #if HAVE_ISATTY
 336         istty = isatty(0) && isatty(2);
 337 #endif
 338         if (istty && tcgetattr (0, &tty) == 0) {
 339             oldtty = tty;
 340             restore_tty = 1;
 341
 342             tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
 343                              |INLCR|IGNCR|ICRNL|IXON);
 344             tty.c_oflag |= OPOST;
 345             tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
 346             tty.c_cflag &= ~(CSIZE|PARENB);
 347             tty.c_cflag |= CS8;
 348             tty.c_cc[VMIN] = 1;
 349             tty.c_cc[VTIME] = 0;
 350
 351             tcsetattr (0, TCSANOW, &tty);
 352         }
 353         signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
 354     }
 355 #endif
 356     avformat_network_deinit();
 357
 358     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
 359     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
 360 #ifdef SIGXCPU
 361     signal(SIGXCPU, sigterm_handler);
 362 #endif
 363 }
 364
 365 /* read a key without blocking */
 366 static int read_key(void)
 367 {
 368     unsigned char ch;
 369 #if HAVE_TERMIOS_H
 370     int n = 1;
 371     struct timeval tv;
 372     fd_set rfds;
 373
 374     FD_ZERO(&rfds);
 375     FD_SET(0, &rfds);
 376     tv.tv_sec = 0;
 377     tv.tv_usec = 0;
 378     n = select(1, &rfds, NULL, NULL, &tv);
 379     if (n > 0) {
 380         n = read(0, &ch, 1);
 381         if (n == 1)
 382             return ch;
 383
 384         return n;
 385     }
 386 #elif HAVE_KBHIT
 387 #    if HAVE_PEEKNAMEDPIPE
 388     static int is_pipe;
 389     static HANDLE input_handle;
 390     DWORD dw, nchars;
 391     if(!input_handle){
 392         input_handle = GetStdHandle(STD_INPUT_HANDLE);
 393         is_pipe = !GetConsoleMode(input_handle, &dw);
 394     }
 395
 396     if (stdin->_cnt > 0) {
 397         read(0, &ch, 1);
 398         return ch;
 399     }
 400     if (is_pipe) {
 401         /* When running under a GUI, you will end here. */
 402         if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL)) {
 403             // input pipe may have been closed by the program that ran ffmpeg
 404             return -1;
 405         }
 406         //Read it
 407         if(nchars != 0) {
 408             read(0, &ch, 1);
 409             return ch;
 410         }else{
 411             return -1;
 412         }
 413     }
 414 #    endif
 415     if(kbhit())
 416         return(getch());
 417 #endif
 418     return -1;
 419 }
 420
 421 static int decode_interrupt_cb(void *ctx)
 422 {
 423     return received_nb_signals > 1;
 424 }
 425
 426 const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
 427
 428 static void ffmpeg_cleanup(int ret)
 429 {
 430     int i, j;
 431
 432     if (do_benchmark) {
 433         int maxrss = getmaxrss() / 1024;
 434         printf("bench: maxrss=%ikB\n", maxrss);
 435     }
 436
 437     for (i = 0; i < nb_filtergraphs; i++) {
 438         avfilter_graph_free(&filtergraphs[i]->graph);
 439         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
 440             av_freep(&filtergraphs[i]->inputs[j]->name);
 441             av_freep(&filtergraphs[i]->inputs[j]);
 442         }
 443         av_freep(&filtergraphs[i]->inputs);
 444         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
 445             av_freep(&filtergraphs[i]->outputs[j]->name);
 446             av_freep(&filtergraphs[i]->outputs[j]);
 447         }
 448         av_freep(&filtergraphs[i]->outputs);
 449         av_freep(&filtergraphs[i]->graph_desc);
 450         av_freep(&filtergraphs[i]);
 451     }
 452     av_freep(&filtergraphs);
 453
 454     av_freep(&subtitle_out);
 455
 456     /* close files */
 457     for (i = 0; i < nb_output_files; i++) {
 458         AVFormatContext *s = output_files[i]->ctx;
 459         if (s && s->oformat && !(s->oformat->flags & AVFMT_NOFILE) && s->pb)
 460             avio_close(s->pb);
 461         avformat_free_context(s);
 462         av_dict_free(&output_files[i]->opts);
 463         av_freep(&output_files[i]);
 464     }
 465     for (i = 0; i < nb_output_streams; i++) {
 466         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
 467         while (bsfc) {
 468             AVBitStreamFilterContext *next = bsfc->next;
 469             av_bitstream_filter_close(bsfc);
 470             bsfc = next;
 471         }
 472         output_streams[i]->bitstream_filters = NULL;
 473         av_frame_free(&output_streams[i]->filtered_frame);
 474
 475         av_parser_close(output_streams[i]->parser);
 476
 477         av_freep(&output_streams[i]->forced_keyframes);
 478         av_expr_free(output_streams[i]->forced_keyframes_pexpr);
 479         av_freep(&output_streams[i]->avfilter);
 480         av_freep(&output_streams[i]->logfile_prefix);
 481         av_freep(&output_streams[i]);
 482     }
 483 #if HAVE_PTHREADS
 484     free_input_threads();
 485 #endif
 486     for (i = 0; i < nb_input_files; i++) {
 487         avformat_close_input(&input_files[i]->ctx);
 488         av_freep(&input_files[i]);
 489     }
 490     for (i = 0; i < nb_input_streams; i++) {
 491         av_frame_free(&input_streams[i]->decoded_frame);
 492         av_frame_free(&input_streams[i]->filter_frame);
 493         av_dict_free(&input_streams[i]->opts);
 494         avsubtitle_free(&input_streams[i]->prev_sub.subtitle);
 495         av_frame_free(&input_streams[i]->sub2video.frame);
 496         av_freep(&input_streams[i]->filters);
 497         av_freep(&input_streams[i]->hwaccel_device);
 498         av_freep(&input_streams[i]);
 499     }
 500
 501     if (vstats_file)
 502         fclose(vstats_file);
 503     av_free(vstats_filename);
 504
 505     av_freep(&input_streams);
 506     av_freep(&input_files);
 507     av_freep(&output_streams);
 508     av_freep(&output_files);
 509
 510     uninit_opts();
 511
 512     avformat_network_deinit();
 513
 514     if (received_sigterm) {
 515         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
 516                (int) received_sigterm);
 517     }
 518     term_exit();
 519 }
 520
 521 void assert_avoptions(AVDictionary *m)
 522 {
 523     AVDictionaryEntry *t;
 524     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
 525         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
 526         exit_program(1);
 527     }
 528 }
 529
 530 static void abort_codec_experimental(AVCodec *c, int encoder)
 531 {
 532     exit_program(1);
 533 }
 534
 535 static void update_benchmark(const char *fmt, ...)
 536 {
 537     if (do_benchmark_all) {
 538         int64_t t = getutime();
 539         va_list va;
 540         char buf[1024];
 541
 542         if (fmt) {
 543             va_start(va, fmt);
 544             vsnprintf(buf, sizeof(buf), fmt, va);
 545             va_end(va);
 546             printf("bench: %8"PRIu64" %s \n", t - current_time, buf);
 547         }
 548         current_time = t;
 549     }
 550 }
 551
 552 static void close_all_output_streams(OutputStream *ost, OSTFinished this_stream, OSTFinished others)
 553 {
 554     int i;
 555     for (i = 0; i < nb_output_streams; i++) {
 556         OutputStream *ost2 = output_streams[i];
 557         ost2->finished |= ost == ost2 ? this_stream : others;
 558     }
 559 }
 560
 561 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
 562 {
 563     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
 564     AVCodecContext          *avctx = ost->st->codec;
 565     int ret;
 566
 567     if ((avctx->codec_type == AVMEDIA_TYPE_VIDEO && video_sync_method == VSYNC_DROP) ||
 568         (avctx->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
 569         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
 570
 571     /*
 572      * Audio encoders may split the packets --  #frames in != #packets out.
 573      * But there is no reordering, so we can limit the number of output packets
 574      * by simply dropping them here.
 575      * Counting encoded video frames needs to be done separately because of
 576      * reordering, see do_video_out()
 577      */
 578     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
 579         if (ost->frame_number >= ost->max_frames) {
 580             av_free_packet(pkt);
 581             return;
 582         }
 583         ost->frame_number++;
 584     }
 585
 586     while (bsfc) {
 587         AVPacket new_pkt = *pkt;
 588         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
 589                                            &new_pkt.data, &new_pkt.size,
 590                                            pkt->data, pkt->size,
 591                                            pkt->flags & AV_PKT_FLAG_KEY);
 592         if(a == 0 && new_pkt.data != pkt->data && new_pkt.destruct) {
 593             uint8_t *t = av_malloc(new_pkt.size + FF_INPUT_BUFFER_PADDING_SIZE); //the new should be a subset of the old so cannot overflow
 594             if(t) {
 595                 memcpy(t, new_pkt.data, new_pkt.size);
 596                 memset(t + new_pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
 597                 new_pkt.data = t;
 598                 new_pkt.buf = NULL;
 599                 a = 1;
 600             } else
 601                 a = AVERROR(ENOMEM);
 602         }
 603         if (a > 0) {
 604             av_free_packet(pkt);
 605             new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
 606                                            av_buffer_default_free, NULL, 0);
 607             if (!new_pkt.buf)
 608                 exit_program(1);
 609         } else if (a < 0) {
 610             av_log(NULL, AV_LOG_ERROR, "Failed to open bitstream filter %s for stream %d with codec %s",
 611                    bsfc->filter->name, pkt->stream_index,
 612                    avctx->codec ? avctx->codec->name : "copy");
 613             print_error("", a);
 614             if (exit_on_error)
 615                 exit_program(1);
 616         }
 617         *pkt = new_pkt;
 618
 619         bsfc = bsfc->next;
 620     }
 621
 622     if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
 623         (avctx->codec_type == AVMEDIA_TYPE_AUDIO || avctx->codec_type == AVMEDIA_TYPE_VIDEO) &&
 624         pkt->dts != AV_NOPTS_VALUE &&
 625         ost->last_mux_dts != AV_NOPTS_VALUE) {
 626       int64_t max = ost->last_mux_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
 627       if (pkt->dts < max) {
 628         int loglevel = max - pkt->dts > 2 || avctx->codec_type == AVMEDIA_TYPE_VIDEO ? AV_LOG_WARNING : AV_LOG_DEBUG;
 629         av_log(s, loglevel, "Non-monotonous DTS in output stream "
 630                "%d:%d; previous: %"PRId64", current: %"PRId64"; ",
 631                ost->file_index, ost->st->index, ost->last_mux_dts, pkt->dts);
 632         if (exit_on_error) {
 633             av_log(NULL, AV_LOG_FATAL, "aborting.\n");
 634             exit_program(1);
 635         }
 636         av_log(s, loglevel, "changing to %"PRId64". This may result "
 637                "in incorrect timestamps in the output file.\n",
 638                max);
 639         if(pkt->pts >= pkt->dts)
 640             pkt->pts = FFMAX(pkt->pts, max);
 641         pkt->dts = max;
 642       }
 643     }
 644     ost->last_mux_dts = pkt->dts;
 645
 646     pkt->stream_index = ost->index;
 647
 648     if (debug_ts) {
 649         av_log(NULL, AV_LOG_INFO, "muxer <- type:%s "
 650                 "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s size:%d\n",
 651                 av_get_media_type_string(ost->st->codec->codec_type),
 652                 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ost->st->time_base),
 653                 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->st->time_base),
 654                 pkt->size
 655               );
 656     }
 657
 658     ret = av_interleaved_write_frame(s, pkt);
 659     if (ret < 0) {
 660         print_error("av_interleaved_write_frame()", ret);
 661         main_return_code = 1;
 662         close_all_output_streams(ost, MUXER_FINISHED | ENCODER_FINISHED, ENCODER_FINISHED);
 663     }
 664 }
 665
 666 static void close_output_stream(OutputStream *ost)
 667 {
 668     OutputFile *of = output_files[ost->file_index];
 669
 670     ost->finished |= ENCODER_FINISHED;
 671     if (of->shortest) {
 672         int64_t end = av_rescale_q(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, AV_TIME_BASE_Q);
 673         of->recording_time = FFMIN(of->recording_time, end);
 674     }
 675 }
 676
 677 static int check_recording_time(OutputStream *ost)
 678 {
 679     OutputFile *of = output_files[ost->file_index];
 680
 681     if (of->recording_time != INT64_MAX &&
 682         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
 683                       AV_TIME_BASE_Q) >= 0) {
 684         close_output_stream(ost);
 685         return 0;
 686     }
 687     return 1;
 688 }
 689
 690 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
 691                          AVFrame *frame)
 692 {
 693     AVCodecContext *enc = ost->st->codec;
 694     AVPacket pkt;
 695     int got_packet = 0;
 696
 697     av_init_packet(&pkt);
 698     pkt.data = NULL;
 699     pkt.size = 0;
 700
 701     if (!check_recording_time(ost))
 702         return;
 703
 704     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
 705         frame->pts = ost->sync_opts;
 706     ost->sync_opts = frame->pts + frame->nb_samples;
 707
 708     av_assert0(pkt.size || !pkt.data);
 709     update_benchmark(NULL);
 710     if (debug_ts) {
 711         av_log(NULL, AV_LOG_INFO, "encoder <- type:audio "
 712                "frame_pts:%s frame_pts_time:%s time_base:%d/%d\n",
 713                av_ts2str(frame->pts), av_ts2timestr(frame->pts, &enc->time_base),
 714                enc->time_base.num, enc->time_base.den);
 715     }
 716     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
 717         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed (avcodec_encode_audio2)\n");
 718         exit_program(1);
 719     }
 720     update_benchmark("encode_audio %d.%d", ost->file_index, ost->index);
 721
 722     if (got_packet) {
 723         if (pkt.pts != AV_NOPTS_VALUE)
 724             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
 725         if (pkt.dts != AV_NOPTS_VALUE)
 726             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
 727         if (pkt.duration > 0)
 728             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
 729
 730         if (debug_ts) {
 731             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
 732                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
 733                    av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
 734                    av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
 735         }
 736
 737         audio_size += pkt.size;
 738         write_frame(s, &pkt, ost);
 739
 740         av_free_packet(&pkt);
 741     }
 742 }
 743
 744 static void do_subtitle_out(AVFormatContext *s,
 745                             OutputStream *ost,
 746                             InputStream *ist,
 747                             AVSubtitle *sub)
 748 {
 749     int subtitle_out_max_size = 1024 * 1024;
 750     int subtitle_out_size, nb, i;
 751     AVCodecContext *enc;
 752     AVPacket pkt;
 753     int64_t pts;
 754
 755     if (sub->pts == AV_NOPTS_VALUE) {
 756         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
 757         if (exit_on_error)
 758             exit_program(1);
 759         return;
 760     }
 761
 762     enc = ost->st->codec;
 763
 764     if (!subtitle_out) {
 765         subtitle_out = av_malloc(subtitle_out_max_size);
 766     }
 767
 768     /* Note: DVB subtitle need one packet to draw them and one other
 769        packet to clear them */
 770     /* XXX: signal it in the codec context ? */
 771     if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
 772         nb = 2;
 773     else
 774         nb = 1;
 775
 776     /* shift timestamp to honor -ss and make check_recording_time() work with -t */
 777     pts = sub->pts;
 778     if (output_files[ost->file_index]->start_time != AV_NOPTS_VALUE)
 779         pts -= output_files[ost->file_index]->start_time;
 780     for (i = 0; i < nb; i++) {
 781         ost->sync_opts = av_rescale_q(pts, AV_TIME_BASE_Q, enc->time_base);
 782         if (!check_recording_time(ost))
 783             return;
 784
 785         sub->pts = pts;
 786         // start_display_time is required to be 0
 787         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
 788         sub->end_display_time  -= sub->start_display_time;
 789         sub->start_display_time = 0;
 790         if (i == 1)
 791             sub->num_rects = 0;
 792         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
 793                                                     subtitle_out_max_size, sub);
 794         if (subtitle_out_size < 0) {
 795             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
 796             exit_program(1);
 797         }
 798
 799         av_init_packet(&pkt);
 800         pkt.data = subtitle_out;
 801         pkt.size = subtitle_out_size;
 802         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
 803         pkt.duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->st->time_base);
 804         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
 805             /* XXX: the pts correction is handled here. Maybe handling
 806                it in the codec would be better */
 807             if (i == 0)
 808                 pkt.pts += 90 * sub->start_display_time;
 809             else
 810                 pkt.pts += 90 * sub->end_display_time;
 811         }
 812         subtitle_size += pkt.size;
 813         write_frame(s, &pkt, ost);
 814     }
 815 }
 816
 817 static void do_video_out(AVFormatContext *s,
 818                          OutputStream *ost,
 819                          AVFrame *in_picture)
 820 {
 821     int ret, format_video_sync;
 822     AVPacket pkt;
 823     AVCodecContext *enc = ost->st->codec;
 824     int nb_frames, i;
 825     double sync_ipts, delta;
 826     double duration = 0;
 827     int frame_size = 0;
 828     InputStream *ist = NULL;
 829
 830     if (ost->source_index >= 0)
 831         ist = input_streams[ost->source_index];
 832
 833     if(ist && ist->st->start_time != AV_NOPTS_VALUE && ist->st->first_dts != AV_NOPTS_VALUE && ost->frame_rate.num)
 834         duration = 1/(av_q2d(ost->frame_rate) * av_q2d(enc->time_base));
 835
 836     sync_ipts = in_picture->pts;
 837     delta = sync_ipts - ost->sync_opts + duration;
 838
 839     /* by default, we output a single frame */
 840     nb_frames = 1;
 841
 842     format_video_sync = video_sync_method;
 843     if (format_video_sync == VSYNC_AUTO) {
 844         if(!strcmp(s->oformat->name, "avi")) {
 845             format_video_sync = VSYNC_VFR;
 846         } else
 847             format_video_sync = (s->oformat->flags & AVFMT_VARIABLE_FPS) ? ((s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH : VSYNC_VFR) : VSYNC_CFR;
 848         if (   ist
 849             && format_video_sync == VSYNC_CFR
 850             && input_files[ist->file_index]->ctx->nb_streams == 1
 851             && input_files[ist->file_index]->input_ts_offset == 0) {
 852             format_video_sync = VSYNC_VSCFR;
 853         }
 854         if (format_video_sync == VSYNC_CFR && copy_ts) {
 855             format_video_sync = VSYNC_VSCFR;
 856         }
 857     }
 858
 859     switch (format_video_sync) {
 860     case VSYNC_VSCFR:
 861         if (ost->frame_number == 0 && delta - duration >= 0.5) {
 862             av_log(NULL, AV_LOG_DEBUG, "Not duplicating %d initial frames\n", (int)lrintf(delta - duration));
 863             delta = duration;
 864             ost->sync_opts = lrint(sync_ipts);
 865         }
 866     case VSYNC_CFR:
 867         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
 868         if (delta < -1.1)
 869             nb_frames = 0;
 870         else if (delta > 1.1)
 871             nb_frames = lrintf(delta);
 872         break;
 873     case VSYNC_VFR:
 874         if (delta <= -0.6)
 875             nb_frames = 0;
 876         else if (delta > 0.6)
 877             ost->sync_opts = lrint(sync_ipts);
 878         break;
 879     case VSYNC_DROP:
 880     case VSYNC_PASSTHROUGH:
 881         ost->sync_opts = lrint(sync_ipts);
 882         break;
 883     default:
 884         av_assert0(0);
 885     }
 886
 887     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
 888     if (nb_frames == 0) {
 889         nb_frames_drop++;
 890         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
 891         return;
 892     } else if (nb_frames > 1) {
 893         if (nb_frames > dts_error_threshold * 30) {
 894             av_log(NULL, AV_LOG_ERROR, "%d frame duplication too large, skipping\n", nb_frames - 1);
 895             nb_frames_drop++;
 896             return;
 897         }
 898         nb_frames_dup += nb_frames - 1;
 899         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
 900     }
 901
 902   /* duplicates frame if needed */
 903   for (i = 0; i < nb_frames; i++) {
 904     av_init_packet(&pkt);
 905     pkt.data = NULL;
 906     pkt.size = 0;
 907
 908     in_picture->pts = ost->sync_opts;
 909
 910 #if 1
 911     if (!check_recording_time(ost))
 912 #else
 913     if (ost->frame_number >= ost->max_frames)
 914 #endif
 915         return;
 916
 917     if (s->oformat->flags & AVFMT_RAWPICTURE &&
 918         enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
 919         /* raw pictures are written as AVPicture structure to
 920            avoid any copies. We support temporarily the older
 921            method. */
 922         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
 923         enc->coded_frame->top_field_first  = in_picture->top_field_first;
 924         if (enc->coded_frame->interlaced_frame)
 925             enc->field_order = enc->coded_frame->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
 926         else
 927             enc->field_order = AV_FIELD_PROGRESSIVE;
 928         pkt.data   = (uint8_t *)in_picture;
 929         pkt.size   =  sizeof(AVPicture);
 930         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
 931         pkt.flags |= AV_PKT_FLAG_KEY;
 932
 933         video_size += pkt.size;
 934         write_frame(s, &pkt, ost);
 935     } else {
 936         int got_packet, forced_keyframe = 0;
 937         double pts_time;
 938
 939         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME) &&
 940             ost->top_field_first >= 0)
 941             in_picture->top_field_first = !!ost->top_field_first;
 942
 943         if (in_picture->interlaced_frame) {
 944             if (enc->codec->id == AV_CODEC_ID_MJPEG)
 945                 enc->field_order = in_picture->top_field_first ? AV_FIELD_TT:AV_FIELD_BB;
 946             else
 947                 enc->field_order = in_picture->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
 948         } else
 949             enc->field_order = AV_FIELD_PROGRESSIVE;
 950
 951         in_picture->quality = ost->st->codec->global_quality;
 952         if (!enc->me_threshold)
 953             in_picture->pict_type = 0;
 954
 955         pts_time = in_picture->pts != AV_NOPTS_VALUE ?
 956             in_picture->pts * av_q2d(enc->time_base) : NAN;
 957         if (ost->forced_kf_index < ost->forced_kf_count &&
 958             in_picture->pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
 959             ost->forced_kf_index++;
 960             forced_keyframe = 1;
 961         } else if (ost->forced_keyframes_pexpr) {
 962             double res;
 963             ost->forced_keyframes_expr_const_values[FKF_T] = pts_time;
 964             res = av_expr_eval(ost->forced_keyframes_pexpr,
 965                                ost->forced_keyframes_expr_const_values, NULL);
 966             av_dlog(NULL, "force_key_frame: n:%f n_forced:%f prev_forced_n:%f t:%f prev_forced_t:%f -> res:%f\n",
 967                     ost->forced_keyframes_expr_const_values[FKF_N],
 968                     ost->forced_keyframes_expr_const_values[FKF_N_FORCED],
 969                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N],
 970                     ost->forced_keyframes_expr_const_values[FKF_T],
 971                     ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T],
 972                     res);
 973             if (res) {
 974                 forced_keyframe = 1;
 975                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] =
 976                     ost->forced_keyframes_expr_const_values[FKF_N];
 977                 ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] =
 978                     ost->forced_keyframes_expr_const_values[FKF_T];
 979                 ost->forced_keyframes_expr_const_values[FKF_N_FORCED] += 1;
 980             }
 981
 982             ost->forced_keyframes_expr_const_values[FKF_N] += 1;
 983         }
 984         if (forced_keyframe) {
 985             in_picture->pict_type = AV_PICTURE_TYPE_I;
 986             av_log(NULL, AV_LOG_DEBUG, "Forced keyframe at time %f\n", pts_time);
 987         }
 988
 989         update_benchmark(NULL);
 990         if (debug_ts) {
 991             av_log(NULL, AV_LOG_INFO, "encoder <- type:video "
 992                    "frame_pts:%s frame_pts_time:%s time_base:%d/%d\n",
 993                    av_ts2str(in_picture->pts), av_ts2timestr(in_picture->pts, &enc->time_base),
 994                    enc->time_base.num, enc->time_base.den);
 995         }
 996
 997         ret = avcodec_encode_video2(enc, &pkt, in_picture, &got_packet);
 998         update_benchmark("encode_video %d.%d", ost->file_index, ost->index);
 999         if (ret < 0) {
1000             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1001             exit_program(1);
1002         }
1003
1004         if (got_packet) {
1005             if (debug_ts) {
1006                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1007                        "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1008                        av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &enc->time_base),
1009                        av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &enc->time_base));
1010             }
1011
1012             if (pkt.pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & CODEC_CAP_DELAY))
1013                 pkt.pts = ost->sync_opts;
1014
1015             if (pkt.pts != AV_NOPTS_VALUE)
1016                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1017             if (pkt.dts != AV_NOPTS_VALUE)
1018                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1019
1020             if (debug_ts) {
1021                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
1022                     "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
1023                     av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ost->st->time_base),
1024                     av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ost->st->time_base));
1025             }
1026
1027             frame_size = pkt.size;
1028             video_size += pkt.size;
1029             write_frame(s, &pkt, ost);
1030             av_free_packet(&pkt);
1031
1032             /* if two pass, output log */
1033             if (ost->logfile && enc->stats_out) {
1034                 fprintf(ost->logfile, "%s", enc->stats_out);
1035             }
1036         }
1037     }
1038     ost->sync_opts++;
1039     /*
1040      * For video, number of frames in == number of packets out.
1041      * But there may be reordering, so we can't throw away frames on encoder
1042      * flush, we need to limit them here, before they go into encoder.
1043      */
1044     ost->frame_number++;
1045
1046     if (vstats_filename && frame_size)
1047         do_video_stats(ost, frame_size);
1048   }
1049 }
1050
1051 static double psnr(double d)
1052 {
1053     return -10.0 * log(d) / log(10.0);
1054 }
1055
1056 static void do_video_stats(OutputStream *ost, int frame_size)
1057 {
1058     AVCodecContext *enc;
1059     int frame_number;
1060     double ti1, bitrate, avg_bitrate;
1061
1062     /* this is executed just the first time do_video_stats is called */
1063     if (!vstats_file) {
1064         vstats_file = fopen(vstats_filename, "w");
1065         if (!vstats_file) {
1066             perror("fopen");
1067             exit_program(1);
1068         }
1069     }
1070
1071     enc = ost->st->codec;
1072     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1073         frame_number = ost->st->nb_frames;
1074         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1075         if (enc->flags&CODEC_FLAG_PSNR)
1076             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1077
1078         fprintf(vstats_file,"f_size= %6d ", frame_size);
1079         /* compute pts value */
1080         ti1 = ost->st->pts.val * av_q2d(enc->time_base);
1081         if (ti1 < 0.01)
1082             ti1 = 0.01;
1083
1084         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1085         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1086         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1087                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1088         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1089     }
1090 }
1091
1092 /**
1093  * Get and encode new output from any of the filtergraphs, without causing
1094  * activity.
1095  *
1096  * @return  0 for success, <0 for severe errors
1097  */
1098 static int reap_filters(void)
1099 {
1100     AVFrame *filtered_frame = NULL;
1101     int i;
1102     int64_t frame_pts;
1103
1104     /* Reap all buffers present in the buffer sinks */
1105     for (i = 0; i < nb_output_streams; i++) {
1106         OutputStream *ost = output_streams[i];
1107         OutputFile    *of = output_files[ost->file_index];
1108         AVFilterContext *filter;
1109         AVCodecContext *enc = ost->st->codec;
1110         int ret = 0;
1111
1112         if (!ost->filter)
1113             continue;
1114         filter = ost->filter->filter;
1115
1116         if (!ost->filtered_frame && !(ost->filtered_frame = av_frame_alloc())) {
1117             return AVERROR(ENOMEM);
1118         }
1119         filtered_frame = ost->filtered_frame;
1120
1121         while (1) {
1122             ret = av_buffersink_get_frame_flags(filter, filtered_frame,
1123                                                AV_BUFFERSINK_FLAG_NO_REQUEST);
1124             if (ret < 0) {
1125                 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
1126                     av_log(NULL, AV_LOG_WARNING,
1127                            "Error in av_buffersink_get_frame_flags(): %s\n", av_err2str(ret));
1128                 }
1129                 break;
1130             }
1131             if (ost->finished) {
1132                 av_frame_unref(filtered_frame);
1133                 continue;
1134             }
1135             frame_pts = AV_NOPTS_VALUE;
1136             if (filtered_frame->pts != AV_NOPTS_VALUE) {
1137                 int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1138                 filtered_frame->pts = frame_pts =
1139                     av_rescale_q(filtered_frame->pts, filter->inputs[0]->time_base, enc->time_base) -
1140                     av_rescale_q(start_time, AV_TIME_BASE_Q, enc->time_base);
1141             }
1142             //if (ost->source_index >= 0)
1143             //    *filtered_frame= *input_streams[ost->source_index]->decoded_frame; //for me_threshold
1144
1145             switch (filter->inputs[0]->type) {
1146             case AVMEDIA_TYPE_VIDEO:
1147                 filtered_frame->pts = frame_pts;
1148                 if (!ost->frame_aspect_ratio.num)
1149                     enc->sample_aspect_ratio = filtered_frame->sample_aspect_ratio;
1150
1151                 if (debug_ts) {
1152                     av_log(NULL, AV_LOG_INFO, "filter -> pts:%s pts_time:%s time_base:%d/%d\n",
1153                             av_ts2str(filtered_frame->pts), av_ts2timestr(filtered_frame->pts, &enc->time_base),
1154                             enc->time_base.num, enc->time_base.den);
1155                 }
1156
1157                 do_video_out(of->ctx, ost, filtered_frame);
1158                 break;
1159             case AVMEDIA_TYPE_AUDIO:
1160                 filtered_frame->pts = frame_pts;
1161                 if (!(enc->codec->capabilities & CODEC_CAP_PARAM_CHANGE) &&
1162                     enc->channels != av_frame_get_channels(filtered_frame)) {
1163                     av_log(NULL, AV_LOG_ERROR,
1164                            "Audio filter graph output is not normalized and encoder does not support parameter changes\n");
1165                     break;
1166                 }
1167                 do_audio_out(of->ctx, ost, filtered_frame);
1168                 break;
1169             default:
1170                 // TODO support subtitle filters
1171                 av_assert0(0);
1172             }
1173
1174             av_frame_unref(filtered_frame);
1175         }
1176     }
1177
1178     return 0;
1179 }
1180
1181 static void print_report(int is_last_report, int64_t timer_start, int64_t cur_time)
1182 {
1183     char buf[1024];
1184     AVBPrint buf_script;
1185     OutputStream *ost;
1186     AVFormatContext *oc;
1187     int64_t total_size;
1188     AVCodecContext *enc;
1189     int frame_number, vid, i;
1190     double bitrate;
1191     int64_t pts = INT64_MIN;
1192     static int64_t last_time = -1;
1193     static int qp_histogram[52];
1194     int hours, mins, secs, us;
1195
1196     if (!print_stats && !is_last_report && !progress_avio)
1197         return;
1198
1199     if (!is_last_report) {
1200         if (last_time == -1) {
1201             last_time = cur_time;
1202             return;
1203         }
1204         if ((cur_time - last_time) < 500000)
1205             return;
1206         last_time = cur_time;
1207     }
1208
1209
1210     oc = output_files[0]->ctx;
1211
1212     total_size = avio_size(oc->pb);
1213     if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
1214         total_size = avio_tell(oc->pb);
1215
1216     buf[0] = '\0';
1217     vid = 0;
1218     av_bprint_init(&buf_script, 0, 1);
1219     for (i = 0; i < nb_output_streams; i++) {
1220         float q = -1;
1221         ost = output_streams[i];
1222         enc = ost->st->codec;
1223         if (!ost->stream_copy && enc->coded_frame)
1224             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1225         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1226             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1227             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1228                        ost->file_index, ost->index, q);
1229         }
1230         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1231             float fps, t = (cur_time-timer_start) / 1000000.0;
1232
1233             frame_number = ost->frame_number;
1234             fps = t > 1 ? frame_number / t : 0;
1235             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3.*f q=%3.1f ",
1236                      frame_number, fps < 9.95, fps, q);
1237             av_bprintf(&buf_script, "frame=%d\n", frame_number);
1238             av_bprintf(&buf_script, "fps=%.1f\n", fps);
1239             av_bprintf(&buf_script, "stream_%d_%d_q=%.1f\n",
1240                        ost->file_index, ost->index, q);
1241             if (is_last_report)
1242                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1243             if (qp_hist) {
1244                 int j;
1245                 int qp = lrintf(q);
1246                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1247                     qp_histogram[qp]++;
1248                 for (j = 0; j < 32; j++)
1249                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
1250             }
1251             if ((enc->flags&CODEC_FLAG_PSNR) && (enc->coded_frame || is_last_report)) {
1252                 int j;
1253                 double error, error_sum = 0;
1254                 double scale, scale_sum = 0;
1255                 double p;
1256                 char type[3] = { 'Y','U','V' };
1257                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1258                 for (j = 0; j < 3; j++) {
1259                     if (is_last_report) {
1260                         error = enc->error[j];
1261                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1262                     } else {
1263                         error = enc->coded_frame->error[j];
1264                         scale = enc->width * enc->height * 255.0 * 255.0;
1265                     }
1266                     if (j)
1267                         scale /= 4;
1268                     error_sum += error;
1269                     scale_sum += scale;
1270                     p = psnr(error / scale);
1271                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], p);
1272                     av_bprintf(&buf_script, "stream_%d_%d_psnr_%c=%2.2f\n",
1273                                ost->file_index, ost->index, type[j] | 32, p);
1274                 }
1275                 p = psnr(error_sum / scale_sum);
1276                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1277                 av_bprintf(&buf_script, "stream_%d_%d_psnr_all=%2.2f\n",
1278                            ost->file_index, ost->index, p);
1279             }
1280             vid = 1;
1281         }
1282         /* compute min output value */
1283         if ((is_last_report || !ost->finished) && ost->st->pts.val != AV_NOPTS_VALUE)
1284             pts = FFMAX(pts, av_rescale_q(ost->st->pts.val,
1285                                           ost->st->time_base, AV_TIME_BASE_Q));
1286     }
1287
1288     secs = pts / AV_TIME_BASE;
1289     us = pts % AV_TIME_BASE;
1290     mins = secs / 60;
1291     secs %= 60;
1292     hours = mins / 60;
1293     mins %= 60;
1294
1295     bitrate = pts && total_size >= 0 ? total_size * 8 / (pts / 1000.0) : -1;
1296
1297     if (total_size < 0) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1298                                  "size=N/A time=");
1299     else                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1300                                  "size=%8.0fkB time=", total_size / 1024.0);
1301     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1302              "%02d:%02d:%02d.%02d ", hours, mins, secs,
1303              (100 * us) / AV_TIME_BASE);
1304     if (bitrate < 0) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1305                               "bitrate=N/A");
1306     else             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1307                               "bitrate=%6.1fkbits/s", bitrate);
1308     if (total_size < 0) av_bprintf(&buf_script, "total_size=N/A\n");
1309     else                av_bprintf(&buf_script, "total_size=%"PRId64"\n", total_size);
1310     av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
1311     av_bprintf(&buf_script, "out_time=%02d:%02d:%02d.%06d\n",
1312                hours, mins, secs, us);
1313
1314     if (nb_frames_dup || nb_frames_drop)
1315         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1316                 nb_frames_dup, nb_frames_drop);
1317     av_bprintf(&buf_script, "dup_frames=%d\n", nb_frames_dup);
1318     av_bprintf(&buf_script, "drop_frames=%d\n", nb_frames_drop);
1319
1320     if (print_stats || is_last_report) {
1321         if (print_stats==1 && AV_LOG_INFO > av_log_get_level()) {
1322             fprintf(stderr, "%s    \r", buf);
1323         } else
1324             av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1325
1326     fflush(stderr);
1327     }
1328
1329     if (progress_avio) {
1330         av_bprintf(&buf_script, "progress=%s\n",
1331                    is_last_report ? "end" : "continue");
1332         avio_write(progress_avio, buf_script.str,
1333                    FFMIN(buf_script.len, buf_script.size - 1));
1334         avio_flush(progress_avio);
1335         av_bprint_finalize(&buf_script, NULL);
1336         if (is_last_report) {
1337             avio_close(progress_avio);
1338             progress_avio = NULL;
1339         }
1340     }
1341
1342     if (is_last_report) {
1343         int64_t raw= audio_size + video_size + data_size + subtitle_size + extra_size;
1344         av_log(NULL, AV_LOG_INFO, "\n");
1345         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB subtitle:%1.0f data:%1.0f global headers:%1.0fkB muxing overhead %f%%\n",
1346                video_size / 1024.0,
1347                audio_size / 1024.0,
1348                subtitle_size / 1024.0,
1349                data_size / 1024.0,
1350                extra_size / 1024.0,
1351                100.0 * (total_size - raw) / raw
1352         );
1353         if(video_size + data_size + audio_size + subtitle_size + extra_size == 0){
1354             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
1355         }
1356     }
1357 }
1358
1359 static void flush_encoders(void)
1360 {
1361     int i, ret;
1362
1363     for (i = 0; i < nb_output_streams; i++) {
1364         OutputStream   *ost = output_streams[i];
1365         AVCodecContext *enc = ost->st->codec;
1366         AVFormatContext *os = output_files[ost->file_index]->ctx;
1367         int stop_encoding = 0;
1368
1369         if (!ost->encoding_needed)
1370             continue;
1371
1372         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1373             continue;
1374         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
1375             continue;
1376
1377         for (;;) {
1378             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1379             const char *desc;
1380             int64_t *size;
1381
1382             switch (ost->st->codec->codec_type) {
1383             case AVMEDIA_TYPE_AUDIO:
1384                 encode = avcodec_encode_audio2;
1385                 desc   = "Audio";
1386                 size   = &audio_size;
1387                 break;
1388             case AVMEDIA_TYPE_VIDEO:
1389                 encode = avcodec_encode_video2;
1390                 desc   = "Video";
1391                 size   = &video_size;
1392                 break;
1393             default:
1394                 stop_encoding = 1;
1395             }
1396
1397             if (encode) {
1398                 AVPacket pkt;
1399                 int got_packet;
1400                 av_init_packet(&pkt);
1401                 pkt.data = NULL;
1402                 pkt.size = 0;
1403
1404                 update_benchmark(NULL);
1405                 ret = encode(enc, &pkt, NULL, &got_packet);
1406                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
1407                 if (ret < 0) {
1408                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1409                     exit_program(1);
1410                 }
1411                 if (ost->logfile && enc->stats_out) {
1412                     fprintf(ost->logfile, "%s", enc->stats_out);
1413                 }
1414                 if (!got_packet) {
1415                     stop_encoding = 1;
1416                     break;
1417                 }
1418                 if (ost->finished & MUXER_FINISHED) {
1419                     av_free_packet(&pkt);
1420                     continue;
1421                 }
1422                 *size += pkt.size;
1423                 if (pkt.pts != AV_NOPTS_VALUE)
1424                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1425                 if (pkt.dts != AV_NOPTS_VALUE)
1426                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1427                 if (pkt.duration > 0)
1428                     pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1429                 write_frame(os, &pkt, ost);
1430                 if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && vstats_filename) {
1431                     do_video_stats(ost, pkt.size);
1432                 }
1433             }
1434
1435             if (stop_encoding)
1436                 break;
1437         }
1438     }
1439 }
1440
1441 /*
1442  * Check whether a packet from ist should be written into ost at this time
1443  */
1444 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1445 {
1446     OutputFile *of = output_files[ost->file_index];
1447     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1448
1449     if (ost->source_index != ist_index)
1450         return 0;
1451
1452     if (ost->finished)
1453         return 0;
1454
1455     if (of->start_time != AV_NOPTS_VALUE && ist->pts < of->start_time)
1456         return 0;
1457
1458     return 1;
1459 }
1460
1461 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1462 {
1463     OutputFile *of = output_files[ost->file_index];
1464     InputFile   *f = input_files [ist->file_index];
1465     int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1466     int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);
1467     int64_t ist_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ist->st->time_base);
1468     AVPicture pict;
1469     AVPacket opkt;
1470
1471     av_init_packet(&opkt);
1472
1473     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1474         !ost->copy_initial_nonkeyframes)
1475         return;
1476
1477     if (pkt->pts == AV_NOPTS_VALUE) {
1478         if (!ost->frame_number && ist->pts < start_time &&
1479             !ost->copy_prior_start)
1480             return;
1481     } else {
1482         if (!ost->frame_number && pkt->pts < ist_tb_start_time &&
1483             !ost->copy_prior_start)
1484             return;
1485     }
1486
1487     if (of->recording_time != INT64_MAX &&
1488         ist->pts >= of->recording_time + start_time) {
1489         close_output_stream(ost);
1490         return;
1491     }
1492
1493     if (f->recording_time != INT64_MAX) {
1494         start_time = f->ctx->start_time;
1495         if (f->start_time != AV_NOPTS_VALUE)
1496             start_time += f->start_time;
1497         if (ist->pts >= f->recording_time + start_time) {
1498             close_output_stream(ost);
1499             return;
1500         }
1501     }
1502
1503     /* force the input stream PTS */
1504     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1505         audio_size += pkt->size;
1506     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1507         video_size += pkt->size;
1508         ost->sync_opts++;
1509     } else if (ost->st->codec->codec_type == AVMEDIA_TYPE_DATA) {
1510         data_size += pkt->size;
1511     } else if (ost->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1512         subtitle_size += pkt->size;
1513     }
1514
1515     if (pkt->pts != AV_NOPTS_VALUE)
1516         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1517     else
1518         opkt.pts = AV_NOPTS_VALUE;
1519
1520     if (pkt->dts == AV_NOPTS_VALUE)
1521         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
1522     else
1523         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1524     opkt.dts -= ost_tb_start_time;
1525
1526     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1527         int duration = av_get_audio_frame_duration(ist->st->codec, pkt->size);
1528         if(!duration)
1529             duration = ist->st->codec->frame_size;
1530         opkt.dts = opkt.pts = av_rescale_delta(ist->st->time_base, pkt->dts,
1531                                                (AVRational){1, ist->st->codec->sample_rate}, duration, &ist->filter_in_rescale_delta_last,
1532                                                ost->st->time_base) - ost_tb_start_time;
1533     }
1534
1535     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1536     opkt.flags    = pkt->flags;
1537
1538     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1539     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1540        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1541        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1542        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1543        ) {
1544         if (av_parser_change(ost->parser, ost->st->codec,
1545                              &opkt.data, &opkt.size,
1546                              pkt->data, pkt->size,
1547                              pkt->flags & AV_PKT_FLAG_KEY)) {
1548             opkt.buf = av_buffer_create(opkt.data, opkt.size, av_buffer_default_free, NULL, 0);
1549             if (!opkt.buf)
1550                 exit_program(1);
1551         }
1552     } else {
1553         opkt.data = pkt->data;
1554         opkt.size = pkt->size;
1555     }
1556     av_copy_packet_side_data(&opkt, pkt);
1557
1558     if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (of->ctx->oformat->flags & AVFMT_RAWPICTURE)) {
1559         /* store AVPicture in AVPacket, as expected by the output format */
1560         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
1561         opkt.data = (uint8_t *)&pict;
1562         opkt.size = sizeof(AVPicture);
1563         opkt.flags |= AV_PKT_FLAG_KEY;
1564     }
1565
1566     write_frame(of->ctx, &opkt, ost);
1567     ost->st->codec->frame_number++;
1568 }
1569
1570 int guess_input_channel_layout(InputStream *ist)
1571 {
1572     AVCodecContext *dec = ist->st->codec;
1573
1574     if (!dec->channel_layout) {
1575         char layout_name[256];
1576
1577         if (dec->channels > ist->guess_layout_max)
1578             return 0;
1579         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1580         if (!dec->channel_layout)
1581             return 0;
1582         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1583                                      dec->channels, dec->channel_layout);
1584         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1585                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1586     }
1587     return 1;
1588 }
1589
1590 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1591 {
1592     AVFrame *decoded_frame, *f;
1593     AVCodecContext *avctx = ist->st->codec;
1594     int i, ret, err = 0, resample_changed;
1595     AVRational decoded_frame_tb;
1596
1597     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1598         return AVERROR(ENOMEM);
1599     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1600         return AVERROR(ENOMEM);
1601     decoded_frame = ist->decoded_frame;
1602
1603     update_benchmark(NULL);
1604     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1605     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
1606
1607     if (ret >= 0 && avctx->sample_rate <= 0) {
1608         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
1609         ret = AVERROR_INVALIDDATA;
1610     }
1611
1612     if (*got_output || ret<0 || pkt->size)
1613         decode_error_stat[ret<0] ++;
1614
1615     if (!*got_output || ret < 0) {
1616         if (!pkt->size) {
1617             for (i = 0; i < ist->nb_filters; i++)
1618 #if 1
1619                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1620 #else
1621                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
1622 #endif
1623         }
1624         return ret;
1625     }
1626
1627 #if 1
1628     /* increment next_dts to use for the case where the input stream does not
1629        have timestamps or there are multiple frames in the packet */
1630     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1631                      avctx->sample_rate;
1632     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1633                      avctx->sample_rate;
1634 #endif
1635
1636     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1637                        ist->resample_channels       != avctx->channels               ||
1638                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1639                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1640     if (resample_changed) {
1641         char layout1[64], layout2[64];
1642
1643         if (!guess_input_channel_layout(ist)) {
1644             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1645                    "layout for Input Stream #%d.%d\n", ist->file_index,
1646                    ist->st->index);
1647             exit_program(1);
1648         }
1649         decoded_frame->channel_layout = avctx->channel_layout;
1650
1651         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1652                                      ist->resample_channel_layout);
1653         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1654                                      decoded_frame->channel_layout);
1655
1656         av_log(NULL, AV_LOG_INFO,
1657                "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",
1658                ist->file_index, ist->st->index,
1659                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1660                ist->resample_channels, layout1,
1661                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1662                avctx->channels, layout2);
1663
1664         ist->resample_sample_fmt     = decoded_frame->format;
1665         ist->resample_sample_rate    = decoded_frame->sample_rate;
1666         ist->resample_channel_layout = decoded_frame->channel_layout;
1667         ist->resample_channels       = avctx->channels;
1668
1669         for (i = 0; i < nb_filtergraphs; i++)
1670             if (ist_in_filtergraph(filtergraphs[i], ist)) {
1671                 FilterGraph *fg = filtergraphs[i];
1672                 int j;
1673                 if (configure_filtergraph(fg) < 0) {
1674                     av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1675                     exit_program(1);
1676                 }
1677                 for (j = 0; j < fg->nb_outputs; j++) {
1678                     OutputStream *ost = fg->outputs[j]->ost;
1679                     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1680                         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1681                         av_buffersink_set_frame_size(ost->filter->filter,
1682                                                      ost->st->codec->frame_size);
1683                 }
1684             }
1685     }
1686
1687     /* if the decoder provides a pts, use it instead of the last packet pts.
1688        the decoder could be delaying output by a packet or more. */
1689     if (decoded_frame->pts != AV_NOPTS_VALUE) {
1690         ist->dts = ist->next_dts = ist->pts = ist->next_pts = av_rescale_q(decoded_frame->pts, avctx->time_base, AV_TIME_BASE_Q);
1691         decoded_frame_tb   = avctx->time_base;
1692     } else if (decoded_frame->pkt_pts != AV_NOPTS_VALUE) {
1693         decoded_frame->pts = decoded_frame->pkt_pts;
1694         pkt->pts           = AV_NOPTS_VALUE;
1695         decoded_frame_tb   = ist->st->time_base;
1696     } else if (pkt->pts != AV_NOPTS_VALUE) {
1697         decoded_frame->pts = pkt->pts;
1698         pkt->pts           = AV_NOPTS_VALUE;
1699         decoded_frame_tb   = ist->st->time_base;
1700     }else {
1701         decoded_frame->pts = ist->dts;
1702         decoded_frame_tb   = AV_TIME_BASE_Q;
1703     }
1704     if (decoded_frame->pts != AV_NOPTS_VALUE)
1705         decoded_frame->pts = av_rescale_delta(decoded_frame_tb, decoded_frame->pts,
1706                                               (AVRational){1, ist->st->codec->sample_rate}, decoded_frame->nb_samples, &ist->filter_in_rescale_delta_last,
1707                                               (AVRational){1, ist->st->codec->sample_rate});
1708     for (i = 0; i < ist->nb_filters; i++) {
1709         if (i < ist->nb_filters - 1) {
1710             f = ist->filter_frame;
1711             err = av_frame_ref(f, decoded_frame);
1712             if (err < 0)
1713                 break;
1714         } else
1715             f = decoded_frame;
1716         err = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f,
1717                                      AV_BUFFERSRC_FLAG_PUSH);
1718         if (err == AVERROR_EOF)
1719             err = 0; /* ignore */
1720         if (err < 0)
1721             break;
1722     }
1723     decoded_frame->pts = AV_NOPTS_VALUE;
1724
1725     av_frame_unref(ist->filter_frame);
1726     av_frame_unref(decoded_frame);
1727     return err < 0 ? err : ret;
1728 }
1729
1730 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1731 {
1732     AVFrame *decoded_frame, *f;
1733     int i, ret = 0, err = 0, resample_changed;
1734     int64_t best_effort_timestamp;
1735     AVRational *frame_sample_aspect;
1736
1737     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1738         return AVERROR(ENOMEM);
1739     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1740         return AVERROR(ENOMEM);
1741     decoded_frame = ist->decoded_frame;
1742     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
1743
1744     update_benchmark(NULL);
1745     ret = avcodec_decode_video2(ist->st->codec,
1746                                 decoded_frame, got_output, pkt);
1747     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
1748
1749     if (*got_output || ret<0 || pkt->size)
1750         decode_error_stat[ret<0] ++;
1751
1752     if (!*got_output || ret < 0) {
1753         if (!pkt->size) {
1754             for (i = 0; i < ist->nb_filters; i++)
1755 #if 1
1756                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1757 #else
1758                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
1759 #endif
1760         }
1761         return ret;
1762     }
1763
1764     if(ist->top_field_first>=0)
1765         decoded_frame->top_field_first = ist->top_field_first;
1766
1767     if (ist->hwaccel_retrieve_data && decoded_frame->format == ist->hwaccel_pix_fmt) {
1768         err = ist->hwaccel_retrieve_data(ist->st->codec, decoded_frame);
1769         if (err < 0)
1770             goto fail;
1771     }
1772     ist->hwaccel_retrieved_pix_fmt = decoded_frame->format;
1773
1774     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
1775     if(best_effort_timestamp != AV_NOPTS_VALUE)
1776         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
1777
1778     if (debug_ts) {
1779         av_log(NULL, AV_LOG_INFO, "decoder -> ist_index:%d type:video "
1780                "frame_pts:%s frame_pts_time:%s best_effort_ts:%"PRId64" best_effort_ts_time:%s keyframe:%d frame_type:%d time_base:%d/%d\n",
1781                ist->st->index, av_ts2str(decoded_frame->pts),
1782                av_ts2timestr(decoded_frame->pts, &ist->st->time_base),
1783                best_effort_timestamp,
1784                av_ts2timestr(best_effort_timestamp, &ist->st->time_base),
1785                decoded_frame->key_frame, decoded_frame->pict_type,
1786                ist->st->time_base.num, ist->st->time_base.den);
1787     }
1788
1789     pkt->size = 0;
1790
1791     if (ist->st->sample_aspect_ratio.num)
1792         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1793
1794     resample_changed = ist->resample_width   != decoded_frame->width  ||
1795                        ist->resample_height  != decoded_frame->height ||
1796                        ist->resample_pix_fmt != decoded_frame->format;
1797     if (resample_changed) {
1798         av_log(NULL, AV_LOG_INFO,
1799                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1800                ist->file_index, ist->st->index,
1801                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1802                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1803
1804         ist->resample_width   = decoded_frame->width;
1805         ist->resample_height  = decoded_frame->height;
1806         ist->resample_pix_fmt = decoded_frame->format;
1807
1808         for (i = 0; i < nb_filtergraphs; i++) {
1809             if (ist_in_filtergraph(filtergraphs[i], ist) && ist->reinit_filters &&
1810                 configure_filtergraph(filtergraphs[i]) < 0) {
1811                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1812                 exit_program(1);
1813             }
1814         }
1815     }
1816
1817     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
1818     for (i = 0; i < ist->nb_filters; i++) {
1819         if (!frame_sample_aspect->num)
1820             *frame_sample_aspect = ist->st->sample_aspect_ratio;
1821
1822         if (i < ist->nb_filters - 1) {
1823             f = ist->filter_frame;
1824             err = av_frame_ref(f, decoded_frame);
1825             if (err < 0)
1826                 break;
1827         } else
1828             f = decoded_frame;
1829         ret = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f, AV_BUFFERSRC_FLAG_PUSH);
1830         if (ret == AVERROR_EOF) {
1831             ret = 0; /* ignore */
1832         } else if (ret < 0) {
1833             av_log(NULL, AV_LOG_FATAL,
1834                    "Failed to inject frame into filter network: %s\n", av_err2str(ret));
1835             exit_program(1);
1836         }
1837     }
1838
1839 fail:
1840     av_frame_unref(ist->filter_frame);
1841     av_frame_unref(decoded_frame);
1842     return err < 0 ? err : ret;
1843 }
1844
1845 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1846 {
1847     AVSubtitle subtitle;
1848     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1849                                           &subtitle, got_output, pkt);
1850
1851     if (*got_output || ret<0 || pkt->size)
1852         decode_error_stat[ret<0] ++;
1853
1854     if (ret < 0 || !*got_output) {
1855         if (!pkt->size)
1856             sub2video_flush(ist);
1857         return ret;
1858     }
1859
1860     if (ist->fix_sub_duration) {
1861         int end = 1;
1862         if (ist->prev_sub.got_output) {
1863             end = av_rescale(subtitle.pts - ist->prev_sub.subtitle.pts,
1864                              1000, AV_TIME_BASE);
1865             if (end < ist->prev_sub.subtitle.end_display_time) {
1866                 av_log(ist->st->codec, AV_LOG_DEBUG,
1867                        "Subtitle duration reduced from %d to %d%s\n",
1868                        ist->prev_sub.subtitle.end_display_time, end,
1869                        end <= 0 ? ", dropping it" : "");
1870                 ist->prev_sub.subtitle.end_display_time = end;
1871             }
1872         }
1873         FFSWAP(int,        *got_output, ist->prev_sub.got_output);
1874         FFSWAP(int,        ret,         ist->prev_sub.ret);
1875         FFSWAP(AVSubtitle, subtitle,    ist->prev_sub.subtitle);
1876         if (end <= 0)
1877             goto out;
1878     }
1879
1880     if (!*got_output)
1881         return ret;
1882
1883     sub2video_update(ist, &subtitle);
1884
1885     if (!subtitle.num_rects)
1886         goto out;
1887
1888     for (i = 0; i < nb_output_streams; i++) {
1889         OutputStream *ost = output_streams[i];
1890
1891         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1892             continue;
1893
1894         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle);
1895     }
1896
1897 out:
1898     avsubtitle_free(&subtitle);
1899     return ret;
1900 }
1901
1902 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1903 static int output_packet(InputStream *ist, const AVPacket *pkt)
1904 {
1905     int ret = 0, i;
1906     int got_output = 0;
1907
1908     AVPacket avpkt;
1909     if (!ist->saw_first_ts) {
1910         ist->dts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
1911         ist->pts = 0;
1912         if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
1913             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
1914             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
1915         }
1916         ist->saw_first_ts = 1;
1917     }
1918
1919     if (ist->next_dts == AV_NOPTS_VALUE)
1920         ist->next_dts = ist->dts;
1921     if (ist->next_pts == AV_NOPTS_VALUE)
1922         ist->next_pts = ist->pts;
1923
1924     if (pkt == NULL) {
1925         /* EOF handling */
1926         av_init_packet(&avpkt);
1927         avpkt.data = NULL;
1928         avpkt.size = 0;
1929         goto handle_eof;
1930     } else {
1931         avpkt = *pkt;
1932     }
1933
1934     if (pkt->dts != AV_NOPTS_VALUE) {
1935         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1936         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
1937             ist->next_pts = ist->pts = ist->dts;
1938     }
1939
1940     // while we have more to decode or while the decoder did output something on EOF
1941     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1942         int duration;
1943     handle_eof:
1944
1945         ist->pts = ist->next_pts;
1946         ist->dts = ist->next_dts;
1947
1948         if (avpkt.size && avpkt.size != pkt->size) {
1949             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1950                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1951             ist->showed_multi_packet_warning = 1;
1952         }
1953
1954         switch (ist->st->codec->codec_type) {
1955         case AVMEDIA_TYPE_AUDIO:
1956             ret = decode_audio    (ist, &avpkt, &got_output);
1957             break;
1958         case AVMEDIA_TYPE_VIDEO:
1959             ret = decode_video    (ist, &avpkt, &got_output);
1960             if (avpkt.duration) {
1961                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1962             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
1963                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
1964                 duration = ((int64_t)AV_TIME_BASE *
1965                                 ist->st->codec->time_base.num * ticks) /
1966                                 ist->st->codec->time_base.den;
1967             } else
1968                 duration = 0;
1969
1970             if(ist->dts != AV_NOPTS_VALUE && duration) {
1971                 ist->next_dts += duration;
1972             }else
1973                 ist->next_dts = AV_NOPTS_VALUE;
1974
1975             if (got_output)
1976                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
1977             break;
1978         case AVMEDIA_TYPE_SUBTITLE:
1979             ret = transcode_subtitles(ist, &avpkt, &got_output);
1980             break;
1981         default:
1982             return -1;
1983         }
1984
1985         if (ret < 0)
1986             return ret;
1987
1988         avpkt.dts=
1989         avpkt.pts= AV_NOPTS_VALUE;
1990
1991         // touch data and size only if not EOF
1992         if (pkt) {
1993             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
1994                 ret = avpkt.size;
1995             avpkt.data += ret;
1996             avpkt.size -= ret;
1997         }
1998         if (!got_output) {
1999             continue;
2000         }
2001     }
2002
2003     /* handle stream copy */
2004     if (!ist->decoding_needed) {
2005         ist->dts = ist->next_dts;
2006         switch (ist->st->codec->codec_type) {
2007         case AVMEDIA_TYPE_AUDIO:
2008             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2009                              ist->st->codec->sample_rate;
2010             break;
2011         case AVMEDIA_TYPE_VIDEO:
2012             if (ist->framerate.num) {
2013                 // TODO: Remove work-around for c99-to-c89 issue 7
2014                 AVRational time_base_q = AV_TIME_BASE_Q;
2015                 int64_t next_dts = av_rescale_q(ist->next_dts, time_base_q, av_inv_q(ist->framerate));
2016                 ist->next_dts = av_rescale_q(next_dts + 1, av_inv_q(ist->framerate), time_base_q);
2017             } else if (pkt->duration) {
2018                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2019             } else if(ist->st->codec->time_base.num != 0) {
2020                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2021                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2022                                   ist->st->codec->time_base.num * ticks) /
2023                                   ist->st->codec->time_base.den;
2024             }
2025             break;
2026         }
2027         ist->pts = ist->dts;
2028         ist->next_pts = ist->next_dts;
2029     }
2030     for (i = 0; pkt && i < nb_output_streams; i++) {
2031         OutputStream *ost = output_streams[i];
2032
2033         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2034             continue;
2035
2036         do_streamcopy(ist, ost, pkt);
2037     }
2038
2039     return 0;
2040 }
2041
2042 static void print_sdp(void)
2043 {
2044     char sdp[16384];
2045     int i;
2046     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2047
2048     if (!avc)
2049         exit_program(1);
2050     for (i = 0; i < nb_output_files; i++)
2051         avc[i] = output_files[i]->ctx;
2052
2053     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2054     printf("SDP:\n%s\n", sdp);
2055     fflush(stdout);
2056     av_freep(&avc);
2057 }
2058
2059 static const HWAccel *get_hwaccel(enum AVPixelFormat pix_fmt)
2060 {
2061     int i;
2062     for (i = 0; hwaccels[i].name; i++)
2063         if (hwaccels[i].pix_fmt == pix_fmt)
2064             return &hwaccels[i];
2065     return NULL;
2066 }
2067
2068 static enum AVPixelFormat get_format(AVCodecContext *s, const enum AVPixelFormat *pix_fmts)
2069 {
2070     InputStream *ist = s->opaque;
2071     const enum AVPixelFormat *p;
2072     int ret;
2073
2074     for (p = pix_fmts; *p != -1; p++) {
2075         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(*p);
2076         const HWAccel *hwaccel;
2077
2078         if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
2079             break;
2080
2081         hwaccel = get_hwaccel(*p);
2082         if (!hwaccel ||
2083             (ist->active_hwaccel_id && ist->active_hwaccel_id != hwaccel->id) ||
2084             (ist->hwaccel_id != HWACCEL_AUTO && ist->hwaccel_id != hwaccel->id))
2085             continue;
2086
2087         ret = hwaccel->init(s);
2088         if (ret < 0) {
2089             if (ist->hwaccel_id == hwaccel->id) {
2090                 av_log(NULL, AV_LOG_FATAL,
2091                        "%s hwaccel requested for input stream #%d:%d, "
2092                        "but cannot be initialized.\n", hwaccel->name,
2093                        ist->file_index, ist->st->index);
2094                 exit_program(1);
2095             }
2096             continue;
2097         }
2098         ist->active_hwaccel_id = hwaccel->id;
2099         ist->hwaccel_pix_fmt   = *p;
2100         break;
2101     }
2102
2103     return *p;
2104 }
2105
2106 static int get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
2107 {
2108     InputStream *ist = s->opaque;
2109
2110     if (ist->hwaccel_get_buffer && frame->format == ist->hwaccel_pix_fmt)
2111         return ist->hwaccel_get_buffer(s, frame, flags);
2112
2113     return avcodec_default_get_buffer2(s, frame, flags);
2114 }
2115
2116 static int init_input_stream(int ist_index, char *error, int error_len)
2117 {
2118     int ret;
2119     InputStream *ist = input_streams[ist_index];
2120
2121     if (ist->decoding_needed) {
2122         AVCodec *codec = ist->dec;
2123         if (!codec) {
2124             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2125                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
2126             return AVERROR(EINVAL);
2127         }
2128
2129         ist->st->codec->opaque      = ist;
2130         ist->st->codec->get_format  = get_format;
2131         ist->st->codec->get_buffer2 = get_buffer;
2132         ist->st->codec->thread_safe_callbacks = 1;
2133
2134         av_opt_set_int(ist->st->codec, "refcounted_frames", 1, 0);
2135
2136         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2137             av_dict_set(&ist->opts, "threads", "auto", 0);
2138         if ((ret = avcodec_open2(ist->st->codec, codec, &ist->opts)) < 0) {
2139             if (ret == AVERROR_EXPERIMENTAL)
2140                 abort_codec_experimental(codec, 0);
2141
2142             snprintf(error, error_len,
2143                      "Error while opening decoder for input stream "
2144                      "#%d:%d : %s",
2145                      ist->file_index, ist->st->index, av_err2str(ret));
2146             return ret;
2147         }
2148         assert_avoptions(ist->opts);
2149     }
2150
2151     ist->next_pts = AV_NOPTS_VALUE;
2152     ist->next_dts = AV_NOPTS_VALUE;
2153     ist->is_start = 1;
2154
2155     return 0;
2156 }
2157
2158 static InputStream *get_input_stream(OutputStream *ost)
2159 {
2160     if (ost->source_index >= 0)
2161         return input_streams[ost->source_index];
2162     return NULL;
2163 }
2164
2165 static int compare_int64(const void *a, const void *b)
2166 {
2167     int64_t va = *(int64_t *)a, vb = *(int64_t *)b;
2168     return va < vb ? -1 : va > vb ? +1 : 0;
2169 }
2170
2171 static void parse_forced_key_frames(char *kf, OutputStream *ost,
2172                                     AVCodecContext *avctx)
2173 {
2174     char *p;
2175     int n = 1, i, size, index = 0;
2176     int64_t t, *pts;
2177
2178     for (p = kf; *p; p++)
2179         if (*p == ',')
2180             n++;
2181     size = n;
2182     pts = av_malloc(sizeof(*pts) * size);
2183     if (!pts) {
2184         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
2185         exit_program(1);
2186     }
2187
2188     p = kf;
2189     for (i = 0; i < n; i++) {
2190         char *next = strchr(p, ',');
2191
2192         if (next)
2193             *next++ = 0;
2194
2195         if (!memcmp(p, "chapters", 8)) {
2196
2197             AVFormatContext *avf = output_files[ost->file_index]->ctx;
2198             int j;
2199
2200             if (avf->nb_chapters > INT_MAX - size ||
2201                 !(pts = av_realloc_f(pts, size += avf->nb_chapters - 1,
2202                                      sizeof(*pts)))) {
2203                 av_log(NULL, AV_LOG_FATAL,
2204                        "Could not allocate forced key frames array.\n");
2205                 exit_program(1);
2206             }
2207             t = p[8] ? parse_time_or_die("force_key_frames", p + 8, 1) : 0;
2208             t = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2209
2210             for (j = 0; j < avf->nb_chapters; j++) {
2211                 AVChapter *c = avf->chapters[j];
2212                 av_assert1(index < size);
2213                 pts[index++] = av_rescale_q(c->start, c->time_base,
2214                                             avctx->time_base) + t;
2215             }
2216
2217         } else {
2218
2219             t = parse_time_or_die("force_key_frames", p, 1);
2220             av_assert1(index < size);
2221             pts[index++] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2222
2223         }
2224
2225         p = next;
2226     }
2227
2228     av_assert0(index == size);
2229     qsort(pts, size, sizeof(*pts), compare_int64);
2230     ost->forced_kf_count = size;
2231     ost->forced_kf_pts   = pts;
2232 }
2233
2234 static void report_new_stream(int input_index, AVPacket *pkt)
2235 {
2236     InputFile *file = input_files[input_index];
2237     AVStream *st = file->ctx->streams[pkt->stream_index];
2238
2239     if (pkt->stream_index < file->nb_streams_warn)
2240         return;
2241     av_log(file->ctx, AV_LOG_WARNING,
2242            "New %s stream %d:%d at pos:%"PRId64" and DTS:%ss\n",
2243            av_get_media_type_string(st->codec->codec_type),
2244            input_index, pkt->stream_index,
2245            pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
2246     file->nb_streams_warn = pkt->stream_index + 1;
2247 }
2248
2249 static int transcode_init(void)
2250 {
2251     int ret = 0, i, j, k;
2252     AVFormatContext *oc;
2253     AVCodecContext *codec;
2254     OutputStream *ost;
2255     InputStream *ist;
2256     char error[1024];
2257     int want_sdp = 1;
2258
2259     for (i = 0; i < nb_filtergraphs; i++) {
2260         FilterGraph *fg = filtergraphs[i];
2261         for (j = 0; j < fg->nb_outputs; j++) {
2262             OutputFilter *ofilter = fg->outputs[j];
2263             if (!ofilter->ost || ofilter->ost->source_index >= 0)
2264                 continue;
2265             if (fg->nb_inputs != 1)
2266                 continue;
2267             for (k = nb_input_streams-1; k >= 0 ; k--)
2268                 if (fg->inputs[0]->ist == input_streams[k])
2269                     break;
2270             ofilter->ost->source_index = k;
2271         }
2272     }
2273
2274     /* init framerate emulation */
2275     for (i = 0; i < nb_input_files; i++) {
2276         InputFile *ifile = input_files[i];
2277         if (ifile->rate_emu)
2278             for (j = 0; j < ifile->nb_streams; j++)
2279                 input_streams[j + ifile->ist_index]->start = av_gettime();
2280     }
2281
2282     /* output stream init */
2283     for (i = 0; i < nb_output_files; i++) {
2284         oc = output_files[i]->ctx;
2285         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2286             av_dump_format(oc, i, oc->filename, 1);
2287             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2288             return AVERROR(EINVAL);
2289         }
2290     }
2291
2292     /* init complex filtergraphs */
2293     for (i = 0; i < nb_filtergraphs; i++)
2294         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2295             return ret;
2296
2297     /* for each output stream, we compute the right encoding parameters */
2298     for (i = 0; i < nb_output_streams; i++) {
2299         AVCodecContext *icodec = NULL;
2300         ost = output_streams[i];
2301         oc  = output_files[ost->file_index]->ctx;
2302         ist = get_input_stream(ost);
2303
2304         if (ost->attachment_filename)
2305             continue;
2306
2307         codec  = ost->st->codec;
2308
2309         if (ist) {
2310             icodec = ist->st->codec;
2311
2312             ost->st->disposition          = ist->st->disposition;
2313             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2314             codec->chroma_sample_location = icodec->chroma_sample_location;
2315         } else {
2316             for (j=0; j<oc->nb_streams; j++) {
2317                 AVStream *st = oc->streams[j];
2318                 if (st != ost->st && st->codec->codec_type == codec->codec_type)
2319                     break;
2320             }
2321             if (j == oc->nb_streams)
2322                 if (codec->codec_type == AVMEDIA_TYPE_AUDIO || codec->codec_type == AVMEDIA_TYPE_VIDEO)
2323                     ost->st->disposition = AV_DISPOSITION_DEFAULT;
2324         }
2325
2326         if (ost->stream_copy) {
2327             AVRational sar;
2328             uint64_t extra_size;
2329
2330             av_assert0(ist && !ost->filter);
2331
2332             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2333
2334             if (extra_size > INT_MAX) {
2335                 return AVERROR(EINVAL);
2336             }
2337
2338             /* if stream_copy is selected, no need to decode or encode */
2339             codec->codec_id   = icodec->codec_id;
2340             codec->codec_type = icodec->codec_type;
2341
2342             if (!codec->codec_tag) {
2343                 unsigned int codec_tag;
2344                 if (!oc->oformat->codec_tag ||
2345                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2346                      !av_codec_get_tag2(oc->oformat->codec_tag, icodec->codec_id, &codec_tag))
2347                     codec->codec_tag = icodec->codec_tag;
2348             }
2349
2350             codec->bit_rate       = icodec->bit_rate;
2351             codec->rc_max_rate    = icodec->rc_max_rate;
2352             codec->rc_buffer_size = icodec->rc_buffer_size;
2353             codec->field_order    = icodec->field_order;
2354             codec->extradata      = av_mallocz(extra_size);
2355             if (!codec->extradata) {
2356                 return AVERROR(ENOMEM);
2357             }
2358             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2359             codec->extradata_size= icodec->extradata_size;
2360             codec->bits_per_coded_sample  = icodec->bits_per_coded_sample;
2361
2362             codec->time_base = ist->st->time_base;
2363             /*
2364              * Avi is a special case here because it supports variable fps but
2365              * having the fps and timebase differe significantly adds quite some
2366              * overhead
2367              */
2368             if(!strcmp(oc->oformat->name, "avi")) {
2369                 if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
2370                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
2371                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(icodec->time_base)
2372                                && av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(icodec->time_base) < 1.0/500
2373                      || copy_tb==2){
2374                     codec->time_base.num = ist->st->r_frame_rate.den;
2375                     codec->time_base.den = 2*ist->st->r_frame_rate.num;
2376                     codec->ticks_per_frame = 2;
2377                 } else if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2378                                  && av_q2d(ist->st->time_base) < 1.0/500
2379                     || copy_tb==0){
2380                     codec->time_base = icodec->time_base;
2381                     codec->time_base.num *= icodec->ticks_per_frame;
2382                     codec->time_base.den *= 2;
2383                     codec->ticks_per_frame = 2;
2384                 }
2385             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2386                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2387                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2388                       && strcmp(oc->oformat->name, "f4v")
2389             ) {
2390                 if(   copy_tb<0 && icodec->time_base.den
2391                                 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
2392                                 && av_q2d(ist->st->time_base) < 1.0/500
2393                    || copy_tb==0){
2394                     codec->time_base = icodec->time_base;
2395                     codec->time_base.num *= icodec->ticks_per_frame;
2396                 }
2397             }
2398             if (   codec->codec_tag == AV_RL32("tmcd")
2399                 && icodec->time_base.num < icodec->time_base.den
2400                 && icodec->time_base.num > 0
2401                 && 121LL*icodec->time_base.num > icodec->time_base.den) {
2402                 codec->time_base = icodec->time_base;
2403             }
2404
2405             if (ist && !ost->frame_rate.num)
2406                 ost->frame_rate = ist->framerate;
2407             if(ost->frame_rate.num)
2408                 codec->time_base = av_inv_q(ost->frame_rate);
2409
2410             av_reduce(&codec->time_base.num, &codec->time_base.den,
2411                         codec->time_base.num, codec->time_base.den, INT_MAX);
2412
2413             ost->parser = av_parser_init(codec->codec_id);
2414
2415             switch (codec->codec_type) {
2416             case AVMEDIA_TYPE_AUDIO:
2417                 if (audio_volume != 256) {
2418                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2419                     exit_program(1);
2420                 }
2421                 codec->channel_layout     = icodec->channel_layout;
2422                 codec->sample_rate        = icodec->sample_rate;
2423                 codec->channels           = icodec->channels;
2424                 codec->frame_size         = icodec->frame_size;
2425                 codec->audio_service_type = icodec->audio_service_type;
2426                 codec->block_align        = icodec->block_align;
2427                 codec->delay              = icodec->delay;
2428                 if((codec->block_align == 1 || codec->block_align == 1152 || codec->block_align == 576) && codec->codec_id == AV_CODEC_ID_MP3)
2429                     codec->block_align= 0;
2430                 if(codec->codec_id == AV_CODEC_ID_AC3)
2431                     codec->block_align= 0;
2432                 break;
2433             case AVMEDIA_TYPE_VIDEO:
2434                 codec->pix_fmt            = icodec->pix_fmt;
2435                 codec->width              = icodec->width;
2436                 codec->height             = icodec->height;
2437                 codec->has_b_frames       = icodec->has_b_frames;
2438                 if (ost->frame_aspect_ratio.num) { // overridden by the -aspect cli option
2439                     sar =
2440                         av_mul_q(ost->frame_aspect_ratio,
2441                                  (AVRational){ codec->height, codec->width });
2442                     av_log(NULL, AV_LOG_WARNING, "Overriding aspect ratio "
2443                            "with stream copy may produce invalid files\n");
2444                 }
2445                 else if (ist->st->sample_aspect_ratio.num)
2446                     sar = ist->st->sample_aspect_ratio;
2447                 else
2448                     sar = icodec->sample_aspect_ratio;
2449                 ost->st->sample_aspect_ratio = codec->sample_aspect_ratio = sar;
2450                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2451                 break;
2452             case AVMEDIA_TYPE_SUBTITLE:
2453                 codec->width  = icodec->width;
2454                 codec->height = icodec->height;
2455                 break;
2456             case AVMEDIA_TYPE_DATA:
2457             case AVMEDIA_TYPE_ATTACHMENT:
2458                 break;
2459             default:
2460                 abort();
2461             }
2462         } else {
2463             if (!ost->enc)
2464                 ost->enc = avcodec_find_encoder(codec->codec_id);
2465             if (!ost->enc) {
2466                 /* should only happen when a default codec is not present. */
2467                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
2468                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
2469                 ret = AVERROR(EINVAL);
2470                 goto dump_format;
2471             }
2472
2473             if (ist)
2474                 ist->decoding_needed++;
2475             ost->encoding_needed = 1;
2476
2477             if (!ost->filter &&
2478                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2479                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2480                     FilterGraph *fg;
2481                     fg = init_simple_filtergraph(ist, ost);
2482                     if (configure_filtergraph(fg)) {
2483                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2484                         exit_program(1);
2485                     }
2486             }
2487
2488             if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2489                 if (ost->filter && !ost->frame_rate.num)
2490                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
2491                 if (ist && !ost->frame_rate.num)
2492                     ost->frame_rate = ist->framerate;
2493                 if (ist && !ost->frame_rate.num)
2494                     ost->frame_rate = ist->st->r_frame_rate;
2495                 if (ist && !ost->frame_rate.num) {
2496                     ost->frame_rate = (AVRational){25, 1};
2497                     av_log(NULL, AV_LOG_WARNING,
2498                            "No information "
2499                            "about the input framerate is available. Falling "
2500                            "back to a default value of 25fps for output stream #%d:%d. Use the -r option "
2501                            "if you want a different framerate.\n",
2502                            ost->file_index, ost->index);
2503                 }
2504 //                    ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
2505                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2506                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2507                     ost->frame_rate = ost->enc->supported_framerates[idx];
2508                 }
2509             }
2510
2511             switch (codec->codec_type) {
2512             case AVMEDIA_TYPE_AUDIO:
2513                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2514                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2515                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2516                 codec->channels       = avfilter_link_get_channels(ost->filter->filter->inputs[0]);
2517                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2518                 break;
2519             case AVMEDIA_TYPE_VIDEO:
2520                 codec->time_base = av_inv_q(ost->frame_rate);
2521                 if (ost->filter && !(codec->time_base.num && codec->time_base.den))
2522                     codec->time_base = ost->filter->filter->inputs[0]->time_base;
2523                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
2524                    && (video_sync_method == VSYNC_CFR || video_sync_method == VSYNC_VSCFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
2525                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
2526                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
2527                 }
2528                 for (j = 0; j < ost->forced_kf_count; j++)
2529                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
2530                                                          AV_TIME_BASE_Q,
2531                                                          codec->time_base);
2532
2533                 codec->width  = ost->filter->filter->inputs[0]->w;
2534                 codec->height = ost->filter->filter->inputs[0]->h;
2535                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2536                     ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option
2537                     av_mul_q(ost->frame_aspect_ratio, (AVRational){ codec->height, codec->width }) :
2538                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2539                 if (!strncmp(ost->enc->name, "libx264", 7) &&
2540                     codec->pix_fmt == AV_PIX_FMT_NONE &&
2541                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2542                     av_log(NULL, AV_LOG_WARNING,
2543                            "No pixel format specified, %s for H.264 encoding chosen.\n"
2544                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2545                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2546                 if (!strncmp(ost->enc->name, "mpeg2video", 10) &&
2547                     codec->pix_fmt == AV_PIX_FMT_NONE &&
2548                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2549                     av_log(NULL, AV_LOG_WARNING,
2550                            "No pixel format specified, %s for MPEG-2 encoding chosen.\n"
2551                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2552                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2553                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2554
2555                 if (!icodec ||
2556                     codec->width   != icodec->width  ||
2557                     codec->height  != icodec->height ||
2558                     codec->pix_fmt != icodec->pix_fmt) {
2559                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
2560                 }
2561
2562                 if (ost->forced_keyframes) {
2563                     if (!strncmp(ost->forced_keyframes, "expr:", 5)) {
2564                         ret = av_expr_parse(&ost->forced_keyframes_pexpr, ost->forced_keyframes+5,
2565                                             forced_keyframes_const_names, NULL, NULL, NULL, NULL, 0, NULL);
2566                         if (ret < 0) {
2567                             av_log(NULL, AV_LOG_ERROR,
2568                                    "Invalid force_key_frames expression '%s'\n", ost->forced_keyframes+5);
2569                             return ret;
2570                         }
2571                         ost->forced_keyframes_expr_const_values[FKF_N] = 0;
2572                         ost->forced_keyframes_expr_const_values[FKF_N_FORCED] = 0;
2573                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] = NAN;
2574                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] = NAN;
2575                     } else {
2576                         parse_forced_key_frames(ost->forced_keyframes, ost, ost->st->codec);
2577                     }
2578                 }
2579                 break;
2580             case AVMEDIA_TYPE_SUBTITLE:
2581                 codec->time_base = (AVRational){1, 1000};
2582                 if (!codec->width) {
2583                     codec->width     = input_streams[ost->source_index]->st->codec->width;
2584                     codec->height    = input_streams[ost->source_index]->st->codec->height;
2585                 }
2586                 break;
2587             default:
2588                 abort();
2589                 break;
2590             }
2591             /* two pass mode */
2592             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
2593                 char logfilename[1024];
2594                 FILE *f;
2595
2596                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2597                          ost->logfile_prefix ? ost->logfile_prefix :
2598                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
2599                          i);
2600                 if (!strcmp(ost->enc->name, "libx264")) {
2601                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2602                 } else {
2603                     if (codec->flags & CODEC_FLAG_PASS2) {
2604                         char  *logbuffer;
2605                         size_t logbuffer_size;
2606                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2607                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2608                                    logfilename);
2609                             exit_program(1);
2610                         }
2611                         codec->stats_in = logbuffer;
2612                     }
2613                     if (codec->flags & CODEC_FLAG_PASS1) {
2614                         f = av_fopen_utf8(logfilename, "wb");
2615                         if (!f) {
2616                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2617                                 logfilename, strerror(errno));
2618                             exit_program(1);
2619                         }
2620                         ost->logfile = f;
2621                     }
2622                 }
2623             }
2624         }
2625     }
2626
2627     /* open each encoder */
2628     for (i = 0; i < nb_output_streams; i++) {
2629         ost = output_streams[i];
2630         if (ost->encoding_needed) {
2631             AVCodec      *codec = ost->enc;
2632             AVCodecContext *dec = NULL;
2633
2634             if ((ist = get_input_stream(ost)))
2635                 dec = ist->st->codec;
2636             if (dec && dec->subtitle_header) {
2637                 /* ASS code assumes this buffer is null terminated so add extra byte. */
2638                 ost->st->codec->subtitle_header = av_mallocz(dec->subtitle_header_size + 1);
2639                 if (!ost->st->codec->subtitle_header) {
2640                     ret = AVERROR(ENOMEM);
2641                     goto dump_format;
2642                 }
2643                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2644                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2645             }
2646             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2647                 av_dict_set(&ost->opts, "threads", "auto", 0);
2648             if ((ret = avcodec_open2(ost->st->codec, codec, &ost->opts)) < 0) {
2649                 if (ret == AVERROR_EXPERIMENTAL)
2650                     abort_codec_experimental(codec, 1);
2651                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2652                         ost->file_index, ost->index);
2653                 goto dump_format;
2654             }
2655             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2656                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
2657                 av_buffersink_set_frame_size(ost->filter->filter,
2658                                              ost->st->codec->frame_size);
2659             assert_avoptions(ost->opts);
2660             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2661                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2662                                              " It takes bits/s as argument, not kbits/s\n");
2663             extra_size += ost->st->codec->extradata_size;
2664         } else {
2665             av_opt_set_dict(ost->st->codec, &ost->opts);
2666         }
2667     }
2668
2669     /* init input streams */
2670     for (i = 0; i < nb_input_streams; i++)
2671         if ((ret = init_input_stream(i, error, sizeof(error))) < 0) {
2672             for (i = 0; i < nb_output_streams; i++) {
2673                 ost = output_streams[i];
2674                 avcodec_close(ost->st->codec);
2675             }
2676             goto dump_format;
2677         }
2678
2679     /* discard unused programs */
2680     for (i = 0; i < nb_input_files; i++) {
2681         InputFile *ifile = input_files[i];
2682         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2683             AVProgram *p = ifile->ctx->programs[j];
2684             int discard  = AVDISCARD_ALL;
2685
2686             for (k = 0; k < p->nb_stream_indexes; k++)
2687                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
2688                     discard = AVDISCARD_DEFAULT;
2689                     break;
2690                 }
2691             p->discard = discard;
2692         }
2693     }
2694
2695     /* open files and write file headers */
2696     for (i = 0; i < nb_output_files; i++) {
2697         oc = output_files[i]->ctx;
2698         oc->interrupt_callback = int_cb;
2699         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
2700             snprintf(error, sizeof(error),
2701                      "Could not write header for output file #%d "
2702                      "(incorrect codec parameters ?): %s",
2703                      i, av_err2str(ret));
2704             ret = AVERROR(EINVAL);
2705             goto dump_format;
2706         }
2707 //         assert_avoptions(output_files[i]->opts);
2708         if (strcmp(oc->oformat->name, "rtp")) {
2709             want_sdp = 0;
2710         }
2711     }
2712
2713  dump_format:
2714     /* dump the file output parameters - cannot be done before in case
2715        of stream copy */
2716     for (i = 0; i < nb_output_files; i++) {
2717         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
2718     }
2719
2720     /* dump the stream mapping */
2721     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2722     for (i = 0; i < nb_input_streams; i++) {
2723         ist = input_streams[i];
2724
2725         for (j = 0; j < ist->nb_filters; j++) {
2726             if (ist->filters[j]->graph->graph_desc) {
2727                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
2728                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
2729                        ist->filters[j]->name);
2730                 if (nb_filtergraphs > 1)
2731                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
2732                 av_log(NULL, AV_LOG_INFO, "\n");
2733             }
2734         }
2735     }
2736
2737     for (i = 0; i < nb_output_streams; i++) {
2738         ost = output_streams[i];
2739
2740         if (ost->attachment_filename) {
2741             /* an attached file */
2742             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2743                    ost->attachment_filename, ost->file_index, ost->index);
2744             continue;
2745         }
2746
2747         if (ost->filter && ost->filter->graph->graph_desc) {
2748             /* output from a complex graph */
2749             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
2750             if (nb_filtergraphs > 1)
2751                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
2752
2753             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
2754                    ost->index, ost->enc ? ost->enc->name : "?");
2755             continue;
2756         }
2757
2758         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2759                input_streams[ost->source_index]->file_index,
2760                input_streams[ost->source_index]->st->index,
2761                ost->file_index,
2762                ost->index);
2763         if (ost->sync_ist != input_streams[ost->source_index])
2764             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2765                    ost->sync_ist->file_index,
2766                    ost->sync_ist->st->index);
2767         if (ost->stream_copy)
2768             av_log(NULL, AV_LOG_INFO, " (copy)");
2769         else
2770             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
2771                    input_streams[ost->source_index]->dec->name : "?",
2772                    ost->enc ? ost->enc->name : "?");
2773         av_log(NULL, AV_LOG_INFO, "\n");
2774     }
2775
2776     if (ret) {
2777         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2778         return ret;
2779     }
2780
2781     if (want_sdp) {
2782         print_sdp();
2783     }
2784
2785     return 0;
2786 }
2787
2788 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
2789 static int need_output(void)
2790 {
2791     int i;
2792
2793     for (i = 0; i < nb_output_streams; i++) {
2794         OutputStream *ost    = output_streams[i];
2795         OutputFile *of       = output_files[ost->file_index];
2796         AVFormatContext *os  = output_files[ost->file_index]->ctx;
2797
2798         if (ost->finished ||
2799             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2800             continue;
2801         if (ost->frame_number >= ost->max_frames) {
2802             int j;
2803             for (j = 0; j < of->ctx->nb_streams; j++)
2804                 close_output_stream(output_streams[of->ost_index + j]);
2805             continue;
2806         }
2807
2808         return 1;
2809     }
2810
2811     return 0;
2812 }
2813
2814 /**
2815  * Select the output stream to process.
2816  *
2817  * @return  selected output stream, or NULL if none available
2818  */
2819 static OutputStream *choose_output(void)
2820 {
2821     int i;
2822     int64_t opts_min = INT64_MAX;
2823     OutputStream *ost_min = NULL;
2824
2825     for (i = 0; i < nb_output_streams; i++) {
2826         OutputStream *ost = output_streams[i];
2827         int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
2828                                     AV_TIME_BASE_Q);
2829         if (!ost->unavailable && !ost->finished && opts < opts_min) {
2830             opts_min = opts;
2831             ost_min  = ost;
2832         }
2833     }
2834     return ost_min;
2835 }
2836
2837 static int check_keyboard_interaction(int64_t cur_time)
2838 {
2839     int i, ret, key;
2840     static int64_t last_time;
2841     if (received_nb_signals)
2842         return AVERROR_EXIT;
2843     /* read_key() returns 0 on EOF */
2844     if(cur_time - last_time >= 100000 && !run_as_daemon){
2845         key =  read_key();
2846         last_time = cur_time;
2847     }else
2848         key = -1;
2849     if (key == 'q')
2850         return AVERROR_EXIT;
2851     if (key == '+') av_log_set_level(av_log_get_level()+10);
2852     if (key == '-') av_log_set_level(av_log_get_level()-10);
2853     if (key == 's') qp_hist     ^= 1;
2854     if (key == 'h'){
2855         if (do_hex_dump){
2856             do_hex_dump = do_pkt_dump = 0;
2857         } else if(do_pkt_dump){
2858             do_hex_dump = 1;
2859         } else
2860             do_pkt_dump = 1;
2861         av_log_set_level(AV_LOG_DEBUG);
2862     }
2863     if (key == 'c' || key == 'C'){
2864         char buf[4096], target[64], command[256], arg[256] = {0};
2865         double time;
2866         int k, n = 0;
2867         fprintf(stderr, "\nEnter command: <target>|all <time>|-1 <command>[ <argument>]\n");
2868         i = 0;
2869         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
2870             if (k > 0)
2871                 buf[i++] = k;
2872         buf[i] = 0;
2873         if (k > 0 &&
2874             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
2875             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
2876                    target, time, command, arg);
2877             for (i = 0; i < nb_filtergraphs; i++) {
2878                 FilterGraph *fg = filtergraphs[i];
2879                 if (fg->graph) {
2880                     if (time < 0) {
2881                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
2882                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
2883                         fprintf(stderr, "Command reply for stream %d: ret:%d res:\n%s", i, ret, buf);
2884                     } else if (key == 'c') {
2885                         fprintf(stderr, "Queing commands only on filters supporting the specific command is unsupported\n");
2886                         ret = AVERROR_PATCHWELCOME;
2887                     } else {
2888                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
2889                     }
2890                 }
2891             }
2892         } else {
2893             av_log(NULL, AV_LOG_ERROR,
2894                    "Parse error, at least 3 arguments were expected, "
2895                    "only %d given in string '%s'\n", n, buf);
2896         }
2897     }
2898     if (key == 'd' || key == 'D'){
2899         int debug=0;
2900         if(key == 'D') {
2901             debug = input_streams[0]->st->codec->debug<<1;
2902             if(!debug) debug = 1;
2903             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
2904                 debug += debug;
2905         }else
2906             if(scanf("%d", &debug)!=1)
2907                 fprintf(stderr,"error parsing debug value\n");
2908         for(i=0;i<nb_input_streams;i++) {
2909             input_streams[i]->st->codec->debug = debug;
2910         }
2911         for(i=0;i<nb_output_streams;i++) {
2912             OutputStream *ost = output_streams[i];
2913             ost->st->codec->debug = debug;
2914         }
2915         if(debug) av_log_set_level(AV_LOG_DEBUG);
2916         fprintf(stderr,"debug=%d\n", debug);
2917     }
2918     if (key == '?'){
2919         fprintf(stderr, "key    function\n"
2920                         "?      show this help\n"
2921                         "+      increase verbosity\n"
2922                         "-      decrease verbosity\n"
2923                         "c      Send command to first matching filter supporting it\n"
2924                         "C      Send/Que command to all matching filters\n"
2925                         "D      cycle through available debug modes\n"
2926                         "h      dump packets/hex press to cycle through the 3 states\n"
2927                         "q      quit\n"
2928                         "s      Show QP histogram\n"
2929         );
2930     }
2931     return 0;
2932 }
2933
2934 #if HAVE_PTHREADS
2935 static void *input_thread(void *arg)
2936 {
2937     InputFile *f = arg;
2938     int ret = 0;
2939
2940     while (!transcoding_finished && ret >= 0) {
2941         AVPacket pkt;
2942         ret = av_read_frame(f->ctx, &pkt);
2943
2944         if (ret == AVERROR(EAGAIN)) {
2945             av_usleep(10000);
2946             ret = 0;
2947             continue;
2948         } else if (ret < 0)
2949             break;
2950
2951         pthread_mutex_lock(&f->fifo_lock);
2952         while (!av_fifo_space(f->fifo))
2953             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2954
2955         av_dup_packet(&pkt);
2956         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2957
2958         pthread_mutex_unlock(&f->fifo_lock);
2959     }
2960
2961     f->finished = 1;
2962     return NULL;
2963 }
2964
2965 static void free_input_threads(void)
2966 {
2967     int i;
2968
2969     if (nb_input_files == 1)
2970         return;
2971
2972     transcoding_finished = 1;
2973
2974     for (i = 0; i < nb_input_files; i++) {
2975         InputFile *f = input_files[i];
2976         AVPacket pkt;
2977
2978         if (!f->fifo || f->joined)
2979             continue;
2980
2981         pthread_mutex_lock(&f->fifo_lock);
2982         while (av_fifo_size(f->fifo)) {
2983             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2984             av_free_packet(&pkt);
2985         }
2986         pthread_cond_signal(&f->fifo_cond);
2987         pthread_mutex_unlock(&f->fifo_lock);
2988
2989         pthread_join(f->thread, NULL);
2990         f->joined = 1;
2991
2992         while (av_fifo_size(f->fifo)) {
2993             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2994             av_free_packet(&pkt);
2995         }
2996         av_fifo_free(f->fifo);
2997     }
2998 }
2999
3000 static int init_input_threads(void)
3001 {
3002     int i, ret;
3003
3004     if (nb_input_files == 1)
3005         return 0;
3006
3007     for (i = 0; i < nb_input_files; i++) {
3008         InputFile *f = input_files[i];
3009
3010         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
3011             return AVERROR(ENOMEM);
3012
3013         pthread_mutex_init(&f->fifo_lock, NULL);
3014         pthread_cond_init (&f->fifo_cond, NULL);
3015
3016         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
3017             return AVERROR(ret);
3018     }
3019     return 0;
3020 }
3021
3022 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
3023 {
3024     int ret = 0;
3025
3026     pthread_mutex_lock(&f->fifo_lock);
3027
3028     if (av_fifo_size(f->fifo)) {
3029         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
3030         pthread_cond_signal(&f->fifo_cond);
3031     } else {
3032         if (f->finished)
3033             ret = AVERROR_EOF;
3034         else
3035             ret = AVERROR(EAGAIN);
3036     }
3037
3038     pthread_mutex_unlock(&f->fifo_lock);
3039
3040     return ret;
3041 }
3042 #endif
3043
3044 static int get_input_packet(InputFile *f, AVPacket *pkt)
3045 {
3046     if (f->rate_emu) {
3047         int i;
3048         for (i = 0; i < f->nb_streams; i++) {
3049             InputStream *ist = input_streams[f->ist_index + i];
3050             int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
3051             int64_t now = av_gettime() - ist->start;
3052             if (pts > now)
3053                 return AVERROR(EAGAIN);
3054         }
3055     }
3056
3057 #if HAVE_PTHREADS
3058     if (nb_input_files > 1)
3059         return get_input_packet_mt(f, pkt);
3060 #endif
3061     return av_read_frame(f->ctx, pkt);
3062 }
3063
3064 static int got_eagain(void)
3065 {
3066     int i;
3067     for (i = 0; i < nb_output_streams; i++)
3068         if (output_streams[i]->unavailable)
3069             return 1;
3070     return 0;
3071 }
3072
3073 static void reset_eagain(void)
3074 {
3075     int i;
3076     for (i = 0; i < nb_input_files; i++)
3077         input_files[i]->eagain = 0;
3078     for (i = 0; i < nb_output_streams; i++)
3079         output_streams[i]->unavailable = 0;
3080 }
3081
3082 /*
3083  * Return
3084  * - 0 -- one packet was read and processed
3085  * - AVERROR(EAGAIN) -- no packets were available for selected file,
3086  *   this function should be called again
3087  * - AVERROR_EOF -- this function should not be called again
3088  */
3089 static int process_input(int file_index)
3090 {
3091     InputFile *ifile = input_files[file_index];
3092     AVFormatContext *is;
3093     InputStream *ist;
3094     AVPacket pkt;
3095     int ret, i, j;
3096
3097     is  = ifile->ctx;
3098     ret = get_input_packet(ifile, &pkt);
3099
3100     if (ret == AVERROR(EAGAIN)) {
3101         ifile->eagain = 1;
3102         return ret;
3103     }
3104     if (ret < 0) {
3105         if (ret != AVERROR_EOF) {
3106             print_error(is->filename, ret);
3107             if (exit_on_error)
3108                 exit_program(1);
3109         }
3110         ifile->eof_reached = 1;
3111
3112         for (i = 0; i < ifile->nb_streams; i++) {
3113             ist = input_streams[ifile->ist_index + i];
3114             if (ist->decoding_needed)
3115                 output_packet(ist, NULL);
3116
3117             /* mark all outputs that don't go through lavfi as finished */
3118             for (j = 0; j < nb_output_streams; j++) {
3119                 OutputStream *ost = output_streams[j];
3120
3121                 if (ost->source_index == ifile->ist_index + i &&
3122                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
3123                     close_output_stream(ost);
3124             }
3125         }
3126
3127         return AVERROR(EAGAIN);
3128     }
3129
3130     reset_eagain();
3131
3132     if (do_pkt_dump) {
3133         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3134                          is->streams[pkt.stream_index]);
3135     }
3136     /* the following test is needed in case new streams appear
3137        dynamically in stream : we ignore them */
3138     if (pkt.stream_index >= ifile->nb_streams) {
3139         report_new_stream(file_index, &pkt);
3140         goto discard_packet;
3141     }
3142
3143     ist = input_streams[ifile->ist_index + pkt.stream_index];
3144     if (ist->discard)
3145         goto discard_packet;
3146
3147     if (debug_ts) {
3148         av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
3149                "next_dts:%s next_dts_time:%s next_pts:%s next_pts_time:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%s off_time:%s\n",
3150                ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->st->codec->codec_type),
3151                av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &AV_TIME_BASE_Q),
3152                av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &AV_TIME_BASE_Q),
3153                av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3154                av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3155                av_ts2str(input_files[ist->file_index]->ts_offset),
3156                av_ts2timestr(input_files[ist->file_index]->ts_offset, &AV_TIME_BASE_Q));
3157     }
3158
3159     if(!ist->wrap_correction_done && is->start_time != AV_NOPTS_VALUE && ist->st->pts_wrap_bits < 64){
3160         int64_t stime, stime2;
3161         // Correcting starttime based on the enabled streams
3162         // FIXME this ideally should be done before the first use of starttime but we do not know which are the enabled streams at that point.
3163         //       so we instead do it here as part of discontinuity handling
3164         if (   ist->next_dts == AV_NOPTS_VALUE
3165             && ifile->ts_offset == -is->start_time
3166             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
3167             int64_t new_start_time = INT64_MAX;
3168             for (i=0; i<is->nb_streams; i++) {
3169                 AVStream *st = is->streams[i];
3170                 if(st->discard == AVDISCARD_ALL || st->start_time == AV_NOPTS_VALUE)
3171                     continue;
3172                 new_start_time = FFMIN(new_start_time, av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q));
3173             }
3174             if (new_start_time > is->start_time) {
3175                 av_log(is, AV_LOG_VERBOSE, "Correcting start time by %"PRId64"\n", new_start_time - is->start_time);
3176                 ifile->ts_offset = -new_start_time;
3177             }
3178         }
3179
3180         stime = av_rescale_q(is->start_time, AV_TIME_BASE_Q, ist->st->time_base);
3181         stime2= stime + (1ULL<<ist->st->pts_wrap_bits);
3182         ist->wrap_correction_done = 1;
3183
3184         if(stime2 > stime && pkt.dts != AV_NOPTS_VALUE && pkt.dts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
3185             pkt.dts -= 1ULL<<ist->st->pts_wrap_bits;
3186             ist->wrap_correction_done = 0;
3187         }
3188         if(stime2 > stime && pkt.pts != AV_NOPTS_VALUE && pkt.pts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
3189             pkt.pts -= 1ULL<<ist->st->pts_wrap_bits;
3190             ist->wrap_correction_done = 0;
3191         }
3192     }
3193
3194     if (pkt.dts != AV_NOPTS_VALUE)
3195         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3196     if (pkt.pts != AV_NOPTS_VALUE)
3197         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3198
3199     if (pkt.pts != AV_NOPTS_VALUE)
3200         pkt.pts *= ist->ts_scale;
3201     if (pkt.dts != AV_NOPTS_VALUE)
3202         pkt.dts *= ist->ts_scale;
3203
3204     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts == AV_NOPTS_VALUE && !copy_ts
3205         && (is->iformat->flags & AVFMT_TS_DISCONT) && ifile->last_ts != AV_NOPTS_VALUE) {
3206         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3207         int64_t delta   = pkt_dts - ifile->last_ts;
3208         if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3209             (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3210                 ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)){
3211             ifile->ts_offset -= delta;
3212             av_log(NULL, AV_LOG_DEBUG,
3213                    "Inter stream timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3214                    delta, ifile->ts_offset);
3215             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3216             if (pkt.pts != AV_NOPTS_VALUE)
3217                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3218         }
3219     }
3220
3221     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
3222         !copy_ts) {
3223         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3224         int64_t delta   = pkt_dts - ist->next_dts;
3225         if (is->iformat->flags & AVFMT_TS_DISCONT) {
3226             if (delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3227                 (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3228                  ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3229                 pkt_dts + AV_TIME_BASE/10 < FFMAX(ist->pts, ist->dts)) {
3230                 ifile->ts_offset -= delta;
3231                 av_log(NULL, AV_LOG_DEBUG,
3232                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3233                        delta, ifile->ts_offset);
3234                 pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3235                 if (pkt.pts != AV_NOPTS_VALUE)
3236                     pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3237             }
3238         } else {
3239             if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3240                 (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)) {
3241                 av_log(NULL, AV_LOG_WARNING, "DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n", pkt.dts, ist->next_dts, pkt.stream_index);
3242                 pkt.dts = AV_NOPTS_VALUE;
3243             }
3244             if (pkt.pts != AV_NOPTS_VALUE){
3245                 int64_t pkt_pts = av_rescale_q(pkt.pts, ist->st->time_base, AV_TIME_BASE_Q);
3246                 delta   = pkt_pts - ist->next_dts;
3247                 if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3248                     (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)) {
3249                     av_log(NULL, AV_LOG_WARNING, "PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n", pkt.pts, ist->next_dts, pkt.stream_index);
3250                     pkt.pts = AV_NOPTS_VALUE;
3251                 }
3252             }
3253         }
3254     }
3255
3256     if (pkt.dts != AV_NOPTS_VALUE)
3257         ifile->last_ts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3258
3259     if (debug_ts) {
3260         av_log(NULL, AV_LOG_INFO, "demuxer+ffmpeg -> ist_index:%d type:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%s off_time:%s\n",
3261                ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->st->codec->codec_type),
3262                av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3263                av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3264                av_ts2str(input_files[ist->file_index]->ts_offset),
3265                av_ts2timestr(input_files[ist->file_index]->ts_offset, &AV_TIME_BASE_Q));
3266     }
3267
3268     sub2video_heartbeat(ist, pkt.pts);
3269
3270     ret = output_packet(ist, &pkt);
3271     if (ret < 0) {
3272         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d: %s\n",
3273                ist->file_index, ist->st->index, av_err2str(ret));
3274         if (exit_on_error)
3275             exit_program(1);
3276     }
3277
3278 discard_packet:
3279     av_free_packet(&pkt);
3280
3281     return 0;
3282 }
3283
3284 /**
3285  * Perform a step of transcoding for the specified filter graph.
3286  *
3287  * @param[in]  graph     filter graph to consider
3288  * @param[out] best_ist  input stream where a frame would allow to continue
3289  * @return  0 for success, <0 for error
3290  */
3291 static int transcode_from_filter(FilterGraph *graph, InputStream **best_ist)
3292 {
3293     int i, ret;
3294     int nb_requests, nb_requests_max = 0;
3295     InputFilter *ifilter;
3296     InputStream *ist;
3297
3298     *best_ist = NULL;
3299     ret = avfilter_graph_request_oldest(graph->graph);
3300     if (ret >= 0)
3301         return reap_filters();
3302
3303     if (ret == AVERROR_EOF) {
3304         ret = reap_filters();
3305         for (i = 0; i < graph->nb_outputs; i++)
3306             close_output_stream(graph->outputs[i]->ost);
3307         return ret;
3308     }
3309     if (ret != AVERROR(EAGAIN))
3310         return ret;
3311
3312     for (i = 0; i < graph->nb_inputs; i++) {
3313         ifilter = graph->inputs[i];
3314         ist = ifilter->ist;
3315         if (input_files[ist->file_index]->eagain ||
3316             input_files[ist->file_index]->eof_reached)
3317             continue;
3318         nb_requests = av_buffersrc_get_nb_failed_requests(ifilter->filter);
3319         if (nb_requests > nb_requests_max) {
3320             nb_requests_max = nb_requests;
3321             *best_ist = ist;
3322         }
3323     }
3324
3325     if (!*best_ist)
3326         for (i = 0; i < graph->nb_outputs; i++)
3327             graph->outputs[i]->ost->unavailable = 1;
3328
3329     return 0;
3330 }
3331
3332 /**
3333  * Run a single step of transcoding.
3334  *
3335  * @return  0 for success, <0 for error
3336  */
3337 static int transcode_step(void)
3338 {
3339     OutputStream *ost;
3340     InputStream  *ist;
3341     int ret;
3342
3343     ost = choose_output();
3344     if (!ost) {
3345         if (got_eagain()) {
3346             reset_eagain();
3347             av_usleep(10000);
3348             return 0;
3349         }
3350         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
3351         return AVERROR_EOF;
3352     }
3353
3354     if (ost->filter) {
3355         if ((ret = transcode_from_filter(ost->filter->graph, &ist)) < 0)
3356             return ret;
3357         if (!ist)
3358             return 0;
3359     } else {
3360         av_assert0(ost->source_index >= 0);
3361         ist = input_streams[ost->source_index];
3362     }
3363
3364     ret = process_input(ist->file_index);
3365     if (ret == AVERROR(EAGAIN)) {
3366         if (input_files[ist->file_index]->eagain)
3367             ost->unavailable = 1;
3368         return 0;
3369     }
3370     if (ret < 0)
3371         return ret == AVERROR_EOF ? 0 : ret;
3372
3373     return reap_filters();
3374 }
3375
3376 /*
3377  * The following code is the main loop of the file converter
3378  */
3379 static int transcode(void)
3380 {
3381     int ret, i;
3382     AVFormatContext *os;
3383     OutputStream *ost;
3384     InputStream *ist;
3385     int64_t timer_start;
3386
3387     ret = transcode_init();
3388     if (ret < 0)
3389         goto fail;
3390
3391     if (stdin_interaction) {
3392         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
3393     }
3394
3395     timer_start = av_gettime();
3396
3397 #if HAVE_PTHREADS
3398     if ((ret = init_input_threads()) < 0)
3399         goto fail;
3400 #endif
3401
3402     while (!received_sigterm) {
3403         int64_t cur_time= av_gettime();
3404
3405         /* if 'q' pressed, exits */
3406         if (stdin_interaction)
3407             if (check_keyboard_interaction(cur_time) < 0)
3408                 break;
3409
3410         /* check if there's any stream where output is still needed */
3411         if (!need_output()) {
3412             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
3413             break;
3414         }
3415
3416         ret = transcode_step();
3417         if (ret < 0) {
3418             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
3419                 continue;
3420
3421             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
3422             break;
3423         }
3424
3425         /* dump report by using the output first video and audio streams */
3426         print_report(0, timer_start, cur_time);
3427     }
3428 #if HAVE_PTHREADS
3429     free_input_threads();
3430 #endif
3431
3432     /* at the end of stream, we must flush the decoder buffers */
3433     for (i = 0; i < nb_input_streams; i++) {
3434         ist = input_streams[i];
3435         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3436             output_packet(ist, NULL);
3437         }
3438     }
3439     flush_encoders();
3440
3441     term_exit();
3442
3443     /* write the trailer if needed and close file */
3444     for (i = 0; i < nb_output_files; i++) {
3445         os = output_files[i]->ctx;
3446         av_write_trailer(os);
3447     }
3448
3449     /* dump report by using the first video and audio streams */
3450     print_report(1, timer_start, av_gettime());
3451
3452     /* close each encoder */
3453     for (i = 0; i < nb_output_streams; i++) {
3454         ost = output_streams[i];
3455         if (ost->encoding_needed) {
3456             av_freep(&ost->st->codec->stats_in);
3457             avcodec_close(ost->st->codec);
3458         }
3459     }
3460
3461     /* close each decoder */
3462     for (i = 0; i < nb_input_streams; i++) {
3463         ist = input_streams[i];
3464         if (ist->decoding_needed) {
3465             avcodec_close(ist->st->codec);
3466             if (ist->hwaccel_uninit)
3467                 ist->hwaccel_uninit(ist->st->codec);
3468         }
3469     }
3470
3471     /* finished ! */
3472     ret = 0;
3473
3474  fail:
3475 #if HAVE_PTHREADS
3476     free_input_threads();
3477 #endif
3478
3479     if (output_streams) {
3480         for (i = 0; i < nb_output_streams; i++) {
3481             ost = output_streams[i];
3482             if (ost) {
3483                 if (ost->stream_copy)
3484                     av_freep(&ost->st->codec->extradata);
3485                 if (ost->logfile) {
3486                     fclose(ost->logfile);
3487                     ost->logfile = NULL;
3488                 }
3489                 av_freep(&ost->st->codec->subtitle_header);
3490                 av_freep(&ost->forced_kf_pts);
3491                 av_freep(&ost->apad);
3492                 av_dict_free(&ost->opts);
3493                 av_dict_free(&ost->swr_opts);
3494                 av_dict_free(&ost->resample_opts);
3495             }
3496         }
3497     }
3498     return ret;
3499 }
3500
3501
3502 static int64_t getutime(void)
3503 {
3504 #if HAVE_GETRUSAGE
3505     struct rusage rusage;
3506
3507     getrusage(RUSAGE_SELF, &rusage);
3508     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
3509 #elif HAVE_GETPROCESSTIMES
3510     HANDLE proc;
3511     FILETIME c, e, k, u;
3512     proc = GetCurrentProcess();
3513     GetProcessTimes(proc, &c, &e, &k, &u);
3514     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
3515 #else
3516     return av_gettime();
3517 #endif
3518 }
3519
3520 static int64_t getmaxrss(void)
3521 {
3522 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
3523     struct rusage rusage;
3524     getrusage(RUSAGE_SELF, &rusage);
3525     return (int64_t)rusage.ru_maxrss * 1024;
3526 #elif HAVE_GETPROCESSMEMORYINFO
3527     HANDLE proc;
3528     PROCESS_MEMORY_COUNTERS memcounters;
3529     proc = GetCurrentProcess();
3530     memcounters.cb = sizeof(memcounters);
3531     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
3532     return memcounters.PeakPagefileUsage;
3533 #else
3534     return 0;
3535 #endif
3536 }
3537
3538 static void log_callback_null(void *ptr, int level, const char *fmt, va_list vl)
3539 {
3540 }
3541
3542 int main(int argc, char **argv)
3543 {
3544     int ret;
3545     int64_t ti;
3546
3547     register_exit(ffmpeg_cleanup);
3548
3549     setvbuf(stderr,NULL,_IONBF,0); /* win32 runtime needs this */
3550
3551     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3552     parse_loglevel(argc, argv, options);
3553
3554     if(argc>1 && !strcmp(argv[1], "-d")){
3555         run_as_daemon=1;
3556         av_log_set_callback(log_callback_null);
3557         argc--;
3558         argv++;
3559     }
3560
3561     avcodec_register_all();
3562 #if CONFIG_AVDEVICE
3563     avdevice_register_all();
3564 #endif
3565     avfilter_register_all();
3566     av_register_all();
3567     avformat_network_init();
3568
3569     show_banner(argc, argv, options);
3570
3571     term_init();
3572
3573     /* parse options and open all input/output files */
3574     ret = ffmpeg_parse_options(argc, argv);
3575     if (ret < 0)
3576         exit_program(1);
3577
3578     if (nb_output_files <= 0 && nb_input_files == 0) {
3579         show_usage();
3580         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3581         exit_program(1);
3582     }
3583
3584     /* file converter / grab */
3585     if (nb_output_files <= 0) {
3586         av_log(NULL, AV_LOG_FATAL, "At least one output file must be specified\n");
3587         exit_program(1);
3588     }
3589
3590 //     if (nb_input_files == 0) {
3591 //         av_log(NULL, AV_LOG_FATAL, "At least one input file must be specified\n");
3592 //         exit_program(1);
3593 //     }
3594
3595     current_time = ti = getutime();
3596     if (transcode() < 0)
3597         exit_program(1);
3598     ti = getutime() - ti;
3599     if (do_benchmark) {
3600         printf("bench: utime=%0.3fs\n", ti / 1000000.0);
3601     }
3602     av_log(NULL, AV_LOG_DEBUG, "%"PRIu64" frames successfully decoded, %"PRIu64" decoding errors\n",
3603            decode_error_stat[0], decode_error_stat[1]);
3604     if ((decode_error_stat[0] + decode_error_stat[1]) * max_error_rate < decode_error_stat[1])
3605         exit_program(69);
3606
3607     exit_program(received_nb_signals ? 255 : main_return_code);
3608     return main_return_code;
3609 }