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         float percent = 0.0;
1345
1346         if (raw)
1347             percent = 100.0 * (total_size - raw) / raw;
1348
1349         av_log(NULL, AV_LOG_INFO, "\n");
1350         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",
1351                video_size / 1024.0,
1352                audio_size / 1024.0,
1353                subtitle_size / 1024.0,
1354                data_size / 1024.0,
1355                extra_size / 1024.0,
1356                percent);
1357         if(video_size + data_size + audio_size + subtitle_size + extra_size == 0){
1358             av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");
1359         }
1360     }
1361 }
1362
1363 static void flush_encoders(void)
1364 {
1365     int i, ret;
1366
1367     for (i = 0; i < nb_output_streams; i++) {
1368         OutputStream   *ost = output_streams[i];
1369         AVCodecContext *enc = ost->st->codec;
1370         AVFormatContext *os = output_files[ost->file_index]->ctx;
1371         int stop_encoding = 0;
1372
1373         if (!ost->encoding_needed)
1374             continue;
1375
1376         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1377             continue;
1378         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
1379             continue;
1380
1381         for (;;) {
1382             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1383             const char *desc;
1384             int64_t *size;
1385
1386             switch (ost->st->codec->codec_type) {
1387             case AVMEDIA_TYPE_AUDIO:
1388                 encode = avcodec_encode_audio2;
1389                 desc   = "Audio";
1390                 size   = &audio_size;
1391                 break;
1392             case AVMEDIA_TYPE_VIDEO:
1393                 encode = avcodec_encode_video2;
1394                 desc   = "Video";
1395                 size   = &video_size;
1396                 break;
1397             default:
1398                 stop_encoding = 1;
1399             }
1400
1401             if (encode) {
1402                 AVPacket pkt;
1403                 int pkt_size;
1404                 int got_packet;
1405                 av_init_packet(&pkt);
1406                 pkt.data = NULL;
1407                 pkt.size = 0;
1408
1409                 update_benchmark(NULL);
1410                 ret = encode(enc, &pkt, NULL, &got_packet);
1411                 update_benchmark("flush %s %d.%d", desc, ost->file_index, ost->index);
1412                 if (ret < 0) {
1413                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1414                     exit_program(1);
1415                 }
1416                 if (ost->logfile && enc->stats_out) {
1417                     fprintf(ost->logfile, "%s", enc->stats_out);
1418                 }
1419                 if (!got_packet) {
1420                     stop_encoding = 1;
1421                     break;
1422                 }
1423                 if (ost->finished & MUXER_FINISHED) {
1424                     av_free_packet(&pkt);
1425                     continue;
1426                 }
1427                 *size += pkt.size;
1428                 if (pkt.pts != AV_NOPTS_VALUE)
1429                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1430                 if (pkt.dts != AV_NOPTS_VALUE)
1431                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1432                 if (pkt.duration > 0)
1433                     pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1434                 pkt_size = pkt.size;
1435                 write_frame(os, &pkt, ost);
1436                 if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && vstats_filename) {
1437                     do_video_stats(ost, pkt_size);
1438                 }
1439             }
1440
1441             if (stop_encoding)
1442                 break;
1443         }
1444     }
1445 }
1446
1447 /*
1448  * Check whether a packet from ist should be written into ost at this time
1449  */
1450 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1451 {
1452     OutputFile *of = output_files[ost->file_index];
1453     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1454
1455     if (ost->source_index != ist_index)
1456         return 0;
1457
1458     if (ost->finished)
1459         return 0;
1460
1461     if (of->start_time != AV_NOPTS_VALUE && ist->pts < of->start_time)
1462         return 0;
1463
1464     return 1;
1465 }
1466
1467 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1468 {
1469     OutputFile *of = output_files[ost->file_index];
1470     InputFile   *f = input_files [ist->file_index];
1471     int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
1472     int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);
1473     int64_t ist_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ist->st->time_base);
1474     AVPicture pict;
1475     AVPacket opkt;
1476
1477     av_init_packet(&opkt);
1478
1479     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1480         !ost->copy_initial_nonkeyframes)
1481         return;
1482
1483     if (pkt->pts == AV_NOPTS_VALUE) {
1484         if (!ost->frame_number && ist->pts < start_time &&
1485             !ost->copy_prior_start)
1486             return;
1487     } else {
1488         if (!ost->frame_number && pkt->pts < ist_tb_start_time &&
1489             !ost->copy_prior_start)
1490             return;
1491     }
1492
1493     if (of->recording_time != INT64_MAX &&
1494         ist->pts >= of->recording_time + start_time) {
1495         close_output_stream(ost);
1496         return;
1497     }
1498
1499     if (f->recording_time != INT64_MAX) {
1500         start_time = f->ctx->start_time;
1501         if (f->start_time != AV_NOPTS_VALUE)
1502             start_time += f->start_time;
1503         if (ist->pts >= f->recording_time + start_time) {
1504             close_output_stream(ost);
1505             return;
1506         }
1507     }
1508
1509     /* force the input stream PTS */
1510     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1511         audio_size += pkt->size;
1512     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1513         video_size += pkt->size;
1514         ost->sync_opts++;
1515     } else if (ost->st->codec->codec_type == AVMEDIA_TYPE_DATA) {
1516         data_size += pkt->size;
1517     } else if (ost->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1518         subtitle_size += pkt->size;
1519     }
1520
1521     if (pkt->pts != AV_NOPTS_VALUE)
1522         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1523     else
1524         opkt.pts = AV_NOPTS_VALUE;
1525
1526     if (pkt->dts == AV_NOPTS_VALUE)
1527         opkt.dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->st->time_base);
1528     else
1529         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1530     opkt.dts -= ost_tb_start_time;
1531
1532     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->dts != AV_NOPTS_VALUE) {
1533         int duration = av_get_audio_frame_duration(ist->st->codec, pkt->size);
1534         if(!duration)
1535             duration = ist->st->codec->frame_size;
1536         opkt.dts = opkt.pts = av_rescale_delta(ist->st->time_base, pkt->dts,
1537                                                (AVRational){1, ist->st->codec->sample_rate}, duration, &ist->filter_in_rescale_delta_last,
1538                                                ost->st->time_base) - ost_tb_start_time;
1539     }
1540
1541     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1542     opkt.flags    = pkt->flags;
1543
1544     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1545     if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
1546        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
1547        && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
1548        && ost->st->codec->codec_id != AV_CODEC_ID_VC1
1549        ) {
1550         if (av_parser_change(ost->parser, ost->st->codec,
1551                              &opkt.data, &opkt.size,
1552                              pkt->data, pkt->size,
1553                              pkt->flags & AV_PKT_FLAG_KEY)) {
1554             opkt.buf = av_buffer_create(opkt.data, opkt.size, av_buffer_default_free, NULL, 0);
1555             if (!opkt.buf)
1556                 exit_program(1);
1557         }
1558     } else {
1559         opkt.data = pkt->data;
1560         opkt.size = pkt->size;
1561     }
1562     av_copy_packet_side_data(&opkt, pkt);
1563
1564     if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (of->ctx->oformat->flags & AVFMT_RAWPICTURE)) {
1565         /* store AVPicture in AVPacket, as expected by the output format */
1566         avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
1567         opkt.data = (uint8_t *)&pict;
1568         opkt.size = sizeof(AVPicture);
1569         opkt.flags |= AV_PKT_FLAG_KEY;
1570     }
1571
1572     write_frame(of->ctx, &opkt, ost);
1573     ost->st->codec->frame_number++;
1574 }
1575
1576 int guess_input_channel_layout(InputStream *ist)
1577 {
1578     AVCodecContext *dec = ist->st->codec;
1579
1580     if (!dec->channel_layout) {
1581         char layout_name[256];
1582
1583         if (dec->channels > ist->guess_layout_max)
1584             return 0;
1585         dec->channel_layout = av_get_default_channel_layout(dec->channels);
1586         if (!dec->channel_layout)
1587             return 0;
1588         av_get_channel_layout_string(layout_name, sizeof(layout_name),
1589                                      dec->channels, dec->channel_layout);
1590         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
1591                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
1592     }
1593     return 1;
1594 }
1595
1596 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
1597 {
1598     AVFrame *decoded_frame, *f;
1599     AVCodecContext *avctx = ist->st->codec;
1600     int i, ret, err = 0, resample_changed;
1601     AVRational decoded_frame_tb;
1602
1603     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1604         return AVERROR(ENOMEM);
1605     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1606         return AVERROR(ENOMEM);
1607     decoded_frame = ist->decoded_frame;
1608
1609     update_benchmark(NULL);
1610     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
1611     update_benchmark("decode_audio %d.%d", ist->file_index, ist->st->index);
1612
1613     if (ret >= 0 && avctx->sample_rate <= 0) {
1614         av_log(avctx, AV_LOG_ERROR, "Sample rate %d invalid\n", avctx->sample_rate);
1615         ret = AVERROR_INVALIDDATA;
1616     }
1617
1618     if (*got_output || ret<0 || pkt->size)
1619         decode_error_stat[ret<0] ++;
1620
1621     if (!*got_output || ret < 0) {
1622         if (!pkt->size) {
1623             for (i = 0; i < ist->nb_filters; i++)
1624 #if 1
1625                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1626 #else
1627                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
1628 #endif
1629         }
1630         return ret;
1631     }
1632
1633 #if 1
1634     /* increment next_dts to use for the case where the input stream does not
1635        have timestamps or there are multiple frames in the packet */
1636     ist->next_pts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1637                      avctx->sample_rate;
1638     ist->next_dts += ((int64_t)AV_TIME_BASE * decoded_frame->nb_samples) /
1639                      avctx->sample_rate;
1640 #endif
1641
1642     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
1643                        ist->resample_channels       != avctx->channels               ||
1644                        ist->resample_channel_layout != decoded_frame->channel_layout ||
1645                        ist->resample_sample_rate    != decoded_frame->sample_rate;
1646     if (resample_changed) {
1647         char layout1[64], layout2[64];
1648
1649         if (!guess_input_channel_layout(ist)) {
1650             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
1651                    "layout for Input Stream #%d.%d\n", ist->file_index,
1652                    ist->st->index);
1653             exit_program(1);
1654         }
1655         decoded_frame->channel_layout = avctx->channel_layout;
1656
1657         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
1658                                      ist->resample_channel_layout);
1659         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
1660                                      decoded_frame->channel_layout);
1661
1662         av_log(NULL, AV_LOG_INFO,
1663                "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",
1664                ist->file_index, ist->st->index,
1665                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
1666                ist->resample_channels, layout1,
1667                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
1668                avctx->channels, layout2);
1669
1670         ist->resample_sample_fmt     = decoded_frame->format;
1671         ist->resample_sample_rate    = decoded_frame->sample_rate;
1672         ist->resample_channel_layout = decoded_frame->channel_layout;
1673         ist->resample_channels       = avctx->channels;
1674
1675         for (i = 0; i < nb_filtergraphs; i++)
1676             if (ist_in_filtergraph(filtergraphs[i], ist)) {
1677                 FilterGraph *fg = filtergraphs[i];
1678                 int j;
1679                 if (configure_filtergraph(fg) < 0) {
1680                     av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1681                     exit_program(1);
1682                 }
1683                 for (j = 0; j < fg->nb_outputs; j++) {
1684                     OutputStream *ost = fg->outputs[j]->ost;
1685                     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1686                         !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1687                         av_buffersink_set_frame_size(ost->filter->filter,
1688                                                      ost->st->codec->frame_size);
1689                 }
1690             }
1691     }
1692
1693     /* if the decoder provides a pts, use it instead of the last packet pts.
1694        the decoder could be delaying output by a packet or more. */
1695     if (decoded_frame->pts != AV_NOPTS_VALUE) {
1696         ist->dts = ist->next_dts = ist->pts = ist->next_pts = av_rescale_q(decoded_frame->pts, avctx->time_base, AV_TIME_BASE_Q);
1697         decoded_frame_tb   = avctx->time_base;
1698     } else if (decoded_frame->pkt_pts != AV_NOPTS_VALUE) {
1699         decoded_frame->pts = decoded_frame->pkt_pts;
1700         pkt->pts           = AV_NOPTS_VALUE;
1701         decoded_frame_tb   = ist->st->time_base;
1702     } else if (pkt->pts != AV_NOPTS_VALUE) {
1703         decoded_frame->pts = pkt->pts;
1704         pkt->pts           = AV_NOPTS_VALUE;
1705         decoded_frame_tb   = ist->st->time_base;
1706     }else {
1707         decoded_frame->pts = ist->dts;
1708         decoded_frame_tb   = AV_TIME_BASE_Q;
1709     }
1710     if (decoded_frame->pts != AV_NOPTS_VALUE)
1711         decoded_frame->pts = av_rescale_delta(decoded_frame_tb, decoded_frame->pts,
1712                                               (AVRational){1, ist->st->codec->sample_rate}, decoded_frame->nb_samples, &ist->filter_in_rescale_delta_last,
1713                                               (AVRational){1, ist->st->codec->sample_rate});
1714     for (i = 0; i < ist->nb_filters; i++) {
1715         if (i < ist->nb_filters - 1) {
1716             f = ist->filter_frame;
1717             err = av_frame_ref(f, decoded_frame);
1718             if (err < 0)
1719                 break;
1720         } else
1721             f = decoded_frame;
1722         err = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f,
1723                                      AV_BUFFERSRC_FLAG_PUSH);
1724         if (err == AVERROR_EOF)
1725             err = 0; /* ignore */
1726         if (err < 0)
1727             break;
1728     }
1729     decoded_frame->pts = AV_NOPTS_VALUE;
1730
1731     av_frame_unref(ist->filter_frame);
1732     av_frame_unref(decoded_frame);
1733     return err < 0 ? err : ret;
1734 }
1735
1736 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
1737 {
1738     AVFrame *decoded_frame, *f;
1739     int i, ret = 0, err = 0, resample_changed;
1740     int64_t best_effort_timestamp;
1741     AVRational *frame_sample_aspect;
1742
1743     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
1744         return AVERROR(ENOMEM);
1745     if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
1746         return AVERROR(ENOMEM);
1747     decoded_frame = ist->decoded_frame;
1748     pkt->dts  = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ist->st->time_base);
1749
1750     update_benchmark(NULL);
1751     ret = avcodec_decode_video2(ist->st->codec,
1752                                 decoded_frame, got_output, pkt);
1753     update_benchmark("decode_video %d.%d", ist->file_index, ist->st->index);
1754
1755     if (*got_output || ret<0 || pkt->size)
1756         decode_error_stat[ret<0] ++;
1757
1758     if (!*got_output || ret < 0) {
1759         if (!pkt->size) {
1760             for (i = 0; i < ist->nb_filters; i++)
1761 #if 1
1762                 av_buffersrc_add_ref(ist->filters[i]->filter, NULL, 0);
1763 #else
1764                 av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
1765 #endif
1766         }
1767         return ret;
1768     }
1769
1770     if(ist->top_field_first>=0)
1771         decoded_frame->top_field_first = ist->top_field_first;
1772
1773     if (ist->hwaccel_retrieve_data && decoded_frame->format == ist->hwaccel_pix_fmt) {
1774         err = ist->hwaccel_retrieve_data(ist->st->codec, decoded_frame);
1775         if (err < 0)
1776             goto fail;
1777     }
1778     ist->hwaccel_retrieved_pix_fmt = decoded_frame->format;
1779
1780     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
1781     if(best_effort_timestamp != AV_NOPTS_VALUE)
1782         ist->next_pts = ist->pts = av_rescale_q(decoded_frame->pts = best_effort_timestamp, ist->st->time_base, AV_TIME_BASE_Q);
1783
1784     if (debug_ts) {
1785         av_log(NULL, AV_LOG_INFO, "decoder -> ist_index:%d type:video "
1786                "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",
1787                ist->st->index, av_ts2str(decoded_frame->pts),
1788                av_ts2timestr(decoded_frame->pts, &ist->st->time_base),
1789                best_effort_timestamp,
1790                av_ts2timestr(best_effort_timestamp, &ist->st->time_base),
1791                decoded_frame->key_frame, decoded_frame->pict_type,
1792                ist->st->time_base.num, ist->st->time_base.den);
1793     }
1794
1795     pkt->size = 0;
1796
1797     if (ist->st->sample_aspect_ratio.num)
1798         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
1799
1800     resample_changed = ist->resample_width   != decoded_frame->width  ||
1801                        ist->resample_height  != decoded_frame->height ||
1802                        ist->resample_pix_fmt != decoded_frame->format;
1803     if (resample_changed) {
1804         av_log(NULL, AV_LOG_INFO,
1805                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
1806                ist->file_index, ist->st->index,
1807                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
1808                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
1809
1810         ist->resample_width   = decoded_frame->width;
1811         ist->resample_height  = decoded_frame->height;
1812         ist->resample_pix_fmt = decoded_frame->format;
1813
1814         for (i = 0; i < nb_filtergraphs; i++) {
1815             if (ist_in_filtergraph(filtergraphs[i], ist) && ist->reinit_filters &&
1816                 configure_filtergraph(filtergraphs[i]) < 0) {
1817                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
1818                 exit_program(1);
1819             }
1820         }
1821     }
1822
1823     frame_sample_aspect= av_opt_ptr(avcodec_get_frame_class(), decoded_frame, "sample_aspect_ratio");
1824     for (i = 0; i < ist->nb_filters; i++) {
1825         if (!frame_sample_aspect->num)
1826             *frame_sample_aspect = ist->st->sample_aspect_ratio;
1827
1828         if (i < ist->nb_filters - 1) {
1829             f = ist->filter_frame;
1830             err = av_frame_ref(f, decoded_frame);
1831             if (err < 0)
1832                 break;
1833         } else
1834             f = decoded_frame;
1835         ret = av_buffersrc_add_frame_flags(ist->filters[i]->filter, f, AV_BUFFERSRC_FLAG_PUSH);
1836         if (ret == AVERROR_EOF) {
1837             ret = 0; /* ignore */
1838         } else if (ret < 0) {
1839             av_log(NULL, AV_LOG_FATAL,
1840                    "Failed to inject frame into filter network: %s\n", av_err2str(ret));
1841             exit_program(1);
1842         }
1843     }
1844
1845 fail:
1846     av_frame_unref(ist->filter_frame);
1847     av_frame_unref(decoded_frame);
1848     return err < 0 ? err : ret;
1849 }
1850
1851 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
1852 {
1853     AVSubtitle subtitle;
1854     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
1855                                           &subtitle, got_output, pkt);
1856
1857     if (*got_output || ret<0 || pkt->size)
1858         decode_error_stat[ret<0] ++;
1859
1860     if (ret < 0 || !*got_output) {
1861         if (!pkt->size)
1862             sub2video_flush(ist);
1863         return ret;
1864     }
1865
1866     if (ist->fix_sub_duration) {
1867         int end = 1;
1868         if (ist->prev_sub.got_output) {
1869             end = av_rescale(subtitle.pts - ist->prev_sub.subtitle.pts,
1870                              1000, AV_TIME_BASE);
1871             if (end < ist->prev_sub.subtitle.end_display_time) {
1872                 av_log(ist->st->codec, AV_LOG_DEBUG,
1873                        "Subtitle duration reduced from %d to %d%s\n",
1874                        ist->prev_sub.subtitle.end_display_time, end,
1875                        end <= 0 ? ", dropping it" : "");
1876                 ist->prev_sub.subtitle.end_display_time = end;
1877             }
1878         }
1879         FFSWAP(int,        *got_output, ist->prev_sub.got_output);
1880         FFSWAP(int,        ret,         ist->prev_sub.ret);
1881         FFSWAP(AVSubtitle, subtitle,    ist->prev_sub.subtitle);
1882         if (end <= 0)
1883             goto out;
1884     }
1885
1886     if (!*got_output)
1887         return ret;
1888
1889     sub2video_update(ist, &subtitle);
1890
1891     if (!subtitle.num_rects)
1892         goto out;
1893
1894     for (i = 0; i < nb_output_streams; i++) {
1895         OutputStream *ost = output_streams[i];
1896
1897         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
1898             continue;
1899
1900         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle);
1901     }
1902
1903 out:
1904     avsubtitle_free(&subtitle);
1905     return ret;
1906 }
1907
1908 /* pkt = NULL means EOF (needed to flush decoder buffers) */
1909 static int output_packet(InputStream *ist, const AVPacket *pkt)
1910 {
1911     int ret = 0, i;
1912     int got_output = 0;
1913
1914     AVPacket avpkt;
1915     if (!ist->saw_first_ts) {
1916         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;
1917         ist->pts = 0;
1918         if (pkt != NULL && pkt->pts != AV_NOPTS_VALUE && !ist->decoding_needed) {
1919             ist->dts += av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
1920             ist->pts = ist->dts; //unused but better to set it to a value thats not totally wrong
1921         }
1922         ist->saw_first_ts = 1;
1923     }
1924
1925     if (ist->next_dts == AV_NOPTS_VALUE)
1926         ist->next_dts = ist->dts;
1927     if (ist->next_pts == AV_NOPTS_VALUE)
1928         ist->next_pts = ist->pts;
1929
1930     if (pkt == NULL) {
1931         /* EOF handling */
1932         av_init_packet(&avpkt);
1933         avpkt.data = NULL;
1934         avpkt.size = 0;
1935         goto handle_eof;
1936     } else {
1937         avpkt = *pkt;
1938     }
1939
1940     if (pkt->dts != AV_NOPTS_VALUE) {
1941         ist->next_dts = ist->dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
1942         if (ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO || !ist->decoding_needed)
1943             ist->next_pts = ist->pts = ist->dts;
1944     }
1945
1946     // while we have more to decode or while the decoder did output something on EOF
1947     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
1948         int duration;
1949     handle_eof:
1950
1951         ist->pts = ist->next_pts;
1952         ist->dts = ist->next_dts;
1953
1954         if (avpkt.size && avpkt.size != pkt->size) {
1955             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
1956                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
1957             ist->showed_multi_packet_warning = 1;
1958         }
1959
1960         switch (ist->st->codec->codec_type) {
1961         case AVMEDIA_TYPE_AUDIO:
1962             ret = decode_audio    (ist, &avpkt, &got_output);
1963             break;
1964         case AVMEDIA_TYPE_VIDEO:
1965             ret = decode_video    (ist, &avpkt, &got_output);
1966             if (avpkt.duration) {
1967                 duration = av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
1968             } else if(ist->st->codec->time_base.num != 0 && ist->st->codec->time_base.den != 0) {
1969                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
1970                 duration = ((int64_t)AV_TIME_BASE *
1971                                 ist->st->codec->time_base.num * ticks) /
1972                                 ist->st->codec->time_base.den;
1973             } else
1974                 duration = 0;
1975
1976             if(ist->dts != AV_NOPTS_VALUE && duration) {
1977                 ist->next_dts += duration;
1978             }else
1979                 ist->next_dts = AV_NOPTS_VALUE;
1980
1981             if (got_output)
1982                 ist->next_pts += duration; //FIXME the duration is not correct in some cases
1983             break;
1984         case AVMEDIA_TYPE_SUBTITLE:
1985             ret = transcode_subtitles(ist, &avpkt, &got_output);
1986             break;
1987         default:
1988             return -1;
1989         }
1990
1991         if (ret < 0)
1992             return ret;
1993
1994         avpkt.dts=
1995         avpkt.pts= AV_NOPTS_VALUE;
1996
1997         // touch data and size only if not EOF
1998         if (pkt) {
1999             if(ist->st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
2000                 ret = avpkt.size;
2001             avpkt.data += ret;
2002             avpkt.size -= ret;
2003         }
2004         if (!got_output) {
2005             continue;
2006         }
2007     }
2008
2009     /* handle stream copy */
2010     if (!ist->decoding_needed) {
2011         ist->dts = ist->next_dts;
2012         switch (ist->st->codec->codec_type) {
2013         case AVMEDIA_TYPE_AUDIO:
2014             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2015                              ist->st->codec->sample_rate;
2016             break;
2017         case AVMEDIA_TYPE_VIDEO:
2018             if (ist->framerate.num) {
2019                 // TODO: Remove work-around for c99-to-c89 issue 7
2020                 AVRational time_base_q = AV_TIME_BASE_Q;
2021                 int64_t next_dts = av_rescale_q(ist->next_dts, time_base_q, av_inv_q(ist->framerate));
2022                 ist->next_dts = av_rescale_q(next_dts + 1, av_inv_q(ist->framerate), time_base_q);
2023             } else if (pkt->duration) {
2024                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
2025             } else if(ist->st->codec->time_base.num != 0) {
2026                 int ticks= ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2027                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2028                                   ist->st->codec->time_base.num * ticks) /
2029                                   ist->st->codec->time_base.den;
2030             }
2031             break;
2032         }
2033         ist->pts = ist->dts;
2034         ist->next_pts = ist->next_dts;
2035     }
2036     for (i = 0; pkt && i < nb_output_streams; i++) {
2037         OutputStream *ost = output_streams[i];
2038
2039         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2040             continue;
2041
2042         do_streamcopy(ist, ost, pkt);
2043     }
2044
2045     return 0;
2046 }
2047
2048 static void print_sdp(void)
2049 {
2050     char sdp[16384];
2051     int i;
2052     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2053
2054     if (!avc)
2055         exit_program(1);
2056     for (i = 0; i < nb_output_files; i++)
2057         avc[i] = output_files[i]->ctx;
2058
2059     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2060     printf("SDP:\n%s\n", sdp);
2061     fflush(stdout);
2062     av_freep(&avc);
2063 }
2064
2065 static const HWAccel *get_hwaccel(enum AVPixelFormat pix_fmt)
2066 {
2067     int i;
2068     for (i = 0; hwaccels[i].name; i++)
2069         if (hwaccels[i].pix_fmt == pix_fmt)
2070             return &hwaccels[i];
2071     return NULL;
2072 }
2073
2074 static enum AVPixelFormat get_format(AVCodecContext *s, const enum AVPixelFormat *pix_fmts)
2075 {
2076     InputStream *ist = s->opaque;
2077     const enum AVPixelFormat *p;
2078     int ret;
2079
2080     for (p = pix_fmts; *p != -1; p++) {
2081         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(*p);
2082         const HWAccel *hwaccel;
2083
2084         if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
2085             break;
2086
2087         hwaccel = get_hwaccel(*p);
2088         if (!hwaccel ||
2089             (ist->active_hwaccel_id && ist->active_hwaccel_id != hwaccel->id) ||
2090             (ist->hwaccel_id != HWACCEL_AUTO && ist->hwaccel_id != hwaccel->id))
2091             continue;
2092
2093         ret = hwaccel->init(s);
2094         if (ret < 0) {
2095             if (ist->hwaccel_id == hwaccel->id) {
2096                 av_log(NULL, AV_LOG_FATAL,
2097                        "%s hwaccel requested for input stream #%d:%d, "
2098                        "but cannot be initialized.\n", hwaccel->name,
2099                        ist->file_index, ist->st->index);
2100                 exit_program(1);
2101             }
2102             continue;
2103         }
2104         ist->active_hwaccel_id = hwaccel->id;
2105         ist->hwaccel_pix_fmt   = *p;
2106         break;
2107     }
2108
2109     return *p;
2110 }
2111
2112 static int get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
2113 {
2114     InputStream *ist = s->opaque;
2115
2116     if (ist->hwaccel_get_buffer && frame->format == ist->hwaccel_pix_fmt)
2117         return ist->hwaccel_get_buffer(s, frame, flags);
2118
2119     return avcodec_default_get_buffer2(s, frame, flags);
2120 }
2121
2122 static int init_input_stream(int ist_index, char *error, int error_len)
2123 {
2124     int ret;
2125     InputStream *ist = input_streams[ist_index];
2126
2127     if (ist->decoding_needed) {
2128         AVCodec *codec = ist->dec;
2129         if (!codec) {
2130             snprintf(error, error_len, "Decoder (codec %s) not found for input stream #%d:%d",
2131                     avcodec_get_name(ist->st->codec->codec_id), ist->file_index, ist->st->index);
2132             return AVERROR(EINVAL);
2133         }
2134
2135         ist->st->codec->opaque      = ist;
2136         ist->st->codec->get_format  = get_format;
2137         ist->st->codec->get_buffer2 = get_buffer;
2138         ist->st->codec->thread_safe_callbacks = 1;
2139
2140         av_opt_set_int(ist->st->codec, "refcounted_frames", 1, 0);
2141
2142         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2143             av_dict_set(&ist->opts, "threads", "auto", 0);
2144         if ((ret = avcodec_open2(ist->st->codec, codec, &ist->opts)) < 0) {
2145             if (ret == AVERROR_EXPERIMENTAL)
2146                 abort_codec_experimental(codec, 0);
2147
2148             snprintf(error, error_len,
2149                      "Error while opening decoder for input stream "
2150                      "#%d:%d : %s",
2151                      ist->file_index, ist->st->index, av_err2str(ret));
2152             return ret;
2153         }
2154         assert_avoptions(ist->opts);
2155     }
2156
2157     ist->next_pts = AV_NOPTS_VALUE;
2158     ist->next_dts = AV_NOPTS_VALUE;
2159
2160     return 0;
2161 }
2162
2163 static InputStream *get_input_stream(OutputStream *ost)
2164 {
2165     if (ost->source_index >= 0)
2166         return input_streams[ost->source_index];
2167     return NULL;
2168 }
2169
2170 static int compare_int64(const void *a, const void *b)
2171 {
2172     int64_t va = *(int64_t *)a, vb = *(int64_t *)b;
2173     return va < vb ? -1 : va > vb ? +1 : 0;
2174 }
2175
2176 static void parse_forced_key_frames(char *kf, OutputStream *ost,
2177                                     AVCodecContext *avctx)
2178 {
2179     char *p;
2180     int n = 1, i, size, index = 0;
2181     int64_t t, *pts;
2182
2183     for (p = kf; *p; p++)
2184         if (*p == ',')
2185             n++;
2186     size = n;
2187     pts = av_malloc(sizeof(*pts) * size);
2188     if (!pts) {
2189         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
2190         exit_program(1);
2191     }
2192
2193     p = kf;
2194     for (i = 0; i < n; i++) {
2195         char *next = strchr(p, ',');
2196
2197         if (next)
2198             *next++ = 0;
2199
2200         if (!memcmp(p, "chapters", 8)) {
2201
2202             AVFormatContext *avf = output_files[ost->file_index]->ctx;
2203             int j;
2204
2205             if (avf->nb_chapters > INT_MAX - size ||
2206                 !(pts = av_realloc_f(pts, size += avf->nb_chapters - 1,
2207                                      sizeof(*pts)))) {
2208                 av_log(NULL, AV_LOG_FATAL,
2209                        "Could not allocate forced key frames array.\n");
2210                 exit_program(1);
2211             }
2212             t = p[8] ? parse_time_or_die("force_key_frames", p + 8, 1) : 0;
2213             t = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2214
2215             for (j = 0; j < avf->nb_chapters; j++) {
2216                 AVChapter *c = avf->chapters[j];
2217                 av_assert1(index < size);
2218                 pts[index++] = av_rescale_q(c->start, c->time_base,
2219                                             avctx->time_base) + t;
2220             }
2221
2222         } else {
2223
2224             t = parse_time_or_die("force_key_frames", p, 1);
2225             av_assert1(index < size);
2226             pts[index++] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
2227
2228         }
2229
2230         p = next;
2231     }
2232
2233     av_assert0(index == size);
2234     qsort(pts, size, sizeof(*pts), compare_int64);
2235     ost->forced_kf_count = size;
2236     ost->forced_kf_pts   = pts;
2237 }
2238
2239 static void report_new_stream(int input_index, AVPacket *pkt)
2240 {
2241     InputFile *file = input_files[input_index];
2242     AVStream *st = file->ctx->streams[pkt->stream_index];
2243
2244     if (pkt->stream_index < file->nb_streams_warn)
2245         return;
2246     av_log(file->ctx, AV_LOG_WARNING,
2247            "New %s stream %d:%d at pos:%"PRId64" and DTS:%ss\n",
2248            av_get_media_type_string(st->codec->codec_type),
2249            input_index, pkt->stream_index,
2250            pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
2251     file->nb_streams_warn = pkt->stream_index + 1;
2252 }
2253
2254 static int transcode_init(void)
2255 {
2256     int ret = 0, i, j, k;
2257     AVFormatContext *oc;
2258     AVCodecContext *codec;
2259     OutputStream *ost;
2260     InputStream *ist;
2261     char error[1024];
2262     int want_sdp = 1;
2263
2264     for (i = 0; i < nb_filtergraphs; i++) {
2265         FilterGraph *fg = filtergraphs[i];
2266         for (j = 0; j < fg->nb_outputs; j++) {
2267             OutputFilter *ofilter = fg->outputs[j];
2268             if (!ofilter->ost || ofilter->ost->source_index >= 0)
2269                 continue;
2270             if (fg->nb_inputs != 1)
2271                 continue;
2272             for (k = nb_input_streams-1; k >= 0 ; k--)
2273                 if (fg->inputs[0]->ist == input_streams[k])
2274                     break;
2275             ofilter->ost->source_index = k;
2276         }
2277     }
2278
2279     /* init framerate emulation */
2280     for (i = 0; i < nb_input_files; i++) {
2281         InputFile *ifile = input_files[i];
2282         if (ifile->rate_emu)
2283             for (j = 0; j < ifile->nb_streams; j++)
2284                 input_streams[j + ifile->ist_index]->start = av_gettime();
2285     }
2286
2287     /* output stream init */
2288     for (i = 0; i < nb_output_files; i++) {
2289         oc = output_files[i]->ctx;
2290         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2291             av_dump_format(oc, i, oc->filename, 1);
2292             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2293             return AVERROR(EINVAL);
2294         }
2295     }
2296
2297     /* init complex filtergraphs */
2298     for (i = 0; i < nb_filtergraphs; i++)
2299         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2300             return ret;
2301
2302     /* for each output stream, we compute the right encoding parameters */
2303     for (i = 0; i < nb_output_streams; i++) {
2304         AVCodecContext *icodec = NULL;
2305         ost = output_streams[i];
2306         oc  = output_files[ost->file_index]->ctx;
2307         ist = get_input_stream(ost);
2308
2309         if (ost->attachment_filename)
2310             continue;
2311
2312         codec  = ost->st->codec;
2313
2314         if (ist) {
2315             icodec = ist->st->codec;
2316
2317             ost->st->disposition          = ist->st->disposition;
2318             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2319             codec->chroma_sample_location = icodec->chroma_sample_location;
2320         } else {
2321             for (j=0; j<oc->nb_streams; j++) {
2322                 AVStream *st = oc->streams[j];
2323                 if (st != ost->st && st->codec->codec_type == codec->codec_type)
2324                     break;
2325             }
2326             if (j == oc->nb_streams)
2327                 if (codec->codec_type == AVMEDIA_TYPE_AUDIO || codec->codec_type == AVMEDIA_TYPE_VIDEO)
2328                     ost->st->disposition = AV_DISPOSITION_DEFAULT;
2329         }
2330
2331         if (ost->stream_copy) {
2332             AVRational sar;
2333             uint64_t extra_size;
2334
2335             av_assert0(ist && !ost->filter);
2336
2337             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2338
2339             if (extra_size > INT_MAX) {
2340                 return AVERROR(EINVAL);
2341             }
2342
2343             /* if stream_copy is selected, no need to decode or encode */
2344             codec->codec_id   = icodec->codec_id;
2345             codec->codec_type = icodec->codec_type;
2346
2347             if (!codec->codec_tag) {
2348                 unsigned int codec_tag;
2349                 if (!oc->oformat->codec_tag ||
2350                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2351                      !av_codec_get_tag2(oc->oformat->codec_tag, icodec->codec_id, &codec_tag))
2352                     codec->codec_tag = icodec->codec_tag;
2353             }
2354
2355             codec->bit_rate       = icodec->bit_rate;
2356             codec->rc_max_rate    = icodec->rc_max_rate;
2357             codec->rc_buffer_size = icodec->rc_buffer_size;
2358             codec->field_order    = icodec->field_order;
2359             codec->extradata      = av_mallocz(extra_size);
2360             if (!codec->extradata) {
2361                 return AVERROR(ENOMEM);
2362             }
2363             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2364             codec->extradata_size= icodec->extradata_size;
2365             codec->bits_per_coded_sample  = icodec->bits_per_coded_sample;
2366
2367             codec->time_base = ist->st->time_base;
2368             /*
2369              * Avi is a special case here because it supports variable fps but
2370              * having the fps and timebase differe significantly adds quite some
2371              * overhead
2372              */
2373             if(!strcmp(oc->oformat->name, "avi")) {
2374                 if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
2375                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
2376                                && 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(icodec->time_base)
2377                                && av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(icodec->time_base) < 1.0/500
2378                      || copy_tb==2){
2379                     codec->time_base.num = ist->st->r_frame_rate.den;
2380                     codec->time_base.den = 2*ist->st->r_frame_rate.num;
2381                     codec->ticks_per_frame = 2;
2382                 } else if (   copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base)
2383                                  && av_q2d(ist->st->time_base) < 1.0/500
2384                     || copy_tb==0){
2385                     codec->time_base = icodec->time_base;
2386                     codec->time_base.num *= icodec->ticks_per_frame;
2387                     codec->time_base.den *= 2;
2388                     codec->ticks_per_frame = 2;
2389                 }
2390             } else if(!(oc->oformat->flags & AVFMT_VARIABLE_FPS)
2391                       && strcmp(oc->oformat->name, "mov") && strcmp(oc->oformat->name, "mp4") && strcmp(oc->oformat->name, "3gp")
2392                       && strcmp(oc->oformat->name, "3g2") && strcmp(oc->oformat->name, "psp") && strcmp(oc->oformat->name, "ipod")
2393                       && strcmp(oc->oformat->name, "f4v")
2394             ) {
2395                 if(   copy_tb<0 && icodec->time_base.den
2396                                 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base)
2397                                 && av_q2d(ist->st->time_base) < 1.0/500
2398                    || copy_tb==0){
2399                     codec->time_base = icodec->time_base;
2400                     codec->time_base.num *= icodec->ticks_per_frame;
2401                 }
2402             }
2403             if (   codec->codec_tag == AV_RL32("tmcd")
2404                 && icodec->time_base.num < icodec->time_base.den
2405                 && icodec->time_base.num > 0
2406                 && 121LL*icodec->time_base.num > icodec->time_base.den) {
2407                 codec->time_base = icodec->time_base;
2408             }
2409
2410             if (ist && !ost->frame_rate.num)
2411                 ost->frame_rate = ist->framerate;
2412             if(ost->frame_rate.num)
2413                 codec->time_base = av_inv_q(ost->frame_rate);
2414
2415             av_reduce(&codec->time_base.num, &codec->time_base.den,
2416                         codec->time_base.num, codec->time_base.den, INT_MAX);
2417
2418             ost->parser = av_parser_init(codec->codec_id);
2419
2420             switch (codec->codec_type) {
2421             case AVMEDIA_TYPE_AUDIO:
2422                 if (audio_volume != 256) {
2423                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2424                     exit_program(1);
2425                 }
2426                 codec->channel_layout     = icodec->channel_layout;
2427                 codec->sample_rate        = icodec->sample_rate;
2428                 codec->channels           = icodec->channels;
2429                 codec->frame_size         = icodec->frame_size;
2430                 codec->audio_service_type = icodec->audio_service_type;
2431                 codec->block_align        = icodec->block_align;
2432                 codec->delay              = icodec->delay;
2433                 if((codec->block_align == 1 || codec->block_align == 1152 || codec->block_align == 576) && codec->codec_id == AV_CODEC_ID_MP3)
2434                     codec->block_align= 0;
2435                 if(codec->codec_id == AV_CODEC_ID_AC3)
2436                     codec->block_align= 0;
2437                 break;
2438             case AVMEDIA_TYPE_VIDEO:
2439                 codec->pix_fmt            = icodec->pix_fmt;
2440                 codec->width              = icodec->width;
2441                 codec->height             = icodec->height;
2442                 codec->has_b_frames       = icodec->has_b_frames;
2443                 if (ost->frame_aspect_ratio.num) { // overridden by the -aspect cli option
2444                     sar =
2445                         av_mul_q(ost->frame_aspect_ratio,
2446                                  (AVRational){ codec->height, codec->width });
2447                     av_log(NULL, AV_LOG_WARNING, "Overriding aspect ratio "
2448                            "with stream copy may produce invalid files\n");
2449                 }
2450                 else if (ist->st->sample_aspect_ratio.num)
2451                     sar = ist->st->sample_aspect_ratio;
2452                 else
2453                     sar = icodec->sample_aspect_ratio;
2454                 ost->st->sample_aspect_ratio = codec->sample_aspect_ratio = sar;
2455                 ost->st->avg_frame_rate = ist->st->avg_frame_rate;
2456                 break;
2457             case AVMEDIA_TYPE_SUBTITLE:
2458                 codec->width  = icodec->width;
2459                 codec->height = icodec->height;
2460                 break;
2461             case AVMEDIA_TYPE_DATA:
2462             case AVMEDIA_TYPE_ATTACHMENT:
2463                 break;
2464             default:
2465                 abort();
2466             }
2467         } else {
2468             if (!ost->enc)
2469                 ost->enc = avcodec_find_encoder(codec->codec_id);
2470             if (!ost->enc) {
2471                 /* should only happen when a default codec is not present. */
2472                 snprintf(error, sizeof(error), "Encoder (codec %s) not found for output stream #%d:%d",
2473                          avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
2474                 ret = AVERROR(EINVAL);
2475                 goto dump_format;
2476             }
2477
2478             if (ist)
2479                 ist->decoding_needed++;
2480             ost->encoding_needed = 1;
2481
2482             if (!ost->filter &&
2483                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2484                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2485                     FilterGraph *fg;
2486                     fg = init_simple_filtergraph(ist, ost);
2487                     if (configure_filtergraph(fg)) {
2488                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2489                         exit_program(1);
2490                     }
2491             }
2492
2493             if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2494                 if (ost->filter && !ost->frame_rate.num)
2495                     ost->frame_rate = av_buffersink_get_frame_rate(ost->filter->filter);
2496                 if (ist && !ost->frame_rate.num)
2497                     ost->frame_rate = ist->framerate;
2498                 if (ist && !ost->frame_rate.num)
2499                     ost->frame_rate = ist->st->r_frame_rate;
2500                 if (ist && !ost->frame_rate.num) {
2501                     ost->frame_rate = (AVRational){25, 1};
2502                     av_log(NULL, AV_LOG_WARNING,
2503                            "No information "
2504                            "about the input framerate is available. Falling "
2505                            "back to a default value of 25fps for output stream #%d:%d. Use the -r option "
2506                            "if you want a different framerate.\n",
2507                            ost->file_index, ost->index);
2508                 }
2509 //                    ost->frame_rate = ist->st->avg_frame_rate.num ? ist->st->avg_frame_rate : (AVRational){25, 1};
2510                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2511                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2512                     ost->frame_rate = ost->enc->supported_framerates[idx];
2513                 }
2514                 if (codec->codec_id == AV_CODEC_ID_MPEG4) {
2515                     av_reduce(&ost->frame_rate.num, &ost->frame_rate.den,
2516                               ost->frame_rate.num, ost->frame_rate.den, 65535);
2517                 }
2518             }
2519
2520             switch (codec->codec_type) {
2521             case AVMEDIA_TYPE_AUDIO:
2522                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2523                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2524                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2525                 codec->channels       = avfilter_link_get_channels(ost->filter->filter->inputs[0]);
2526                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2527                 break;
2528             case AVMEDIA_TYPE_VIDEO:
2529                 codec->time_base = av_inv_q(ost->frame_rate);
2530                 if (ost->filter && !(codec->time_base.num && codec->time_base.den))
2531                     codec->time_base = ost->filter->filter->inputs[0]->time_base;
2532                 if (   av_q2d(codec->time_base) < 0.001 && video_sync_method != VSYNC_PASSTHROUGH
2533                    && (video_sync_method == VSYNC_CFR || video_sync_method == VSYNC_VSCFR || (video_sync_method == VSYNC_AUTO && !(oc->oformat->flags & AVFMT_VARIABLE_FPS)))){
2534                     av_log(oc, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n"
2535                                                "Please consider specifying a lower framerate, a different muxer or -vsync 2\n");
2536                 }
2537                 for (j = 0; j < ost->forced_kf_count; j++)
2538                     ost->forced_kf_pts[j] = av_rescale_q(ost->forced_kf_pts[j],
2539                                                          AV_TIME_BASE_Q,
2540                                                          codec->time_base);
2541
2542                 codec->width  = ost->filter->filter->inputs[0]->w;
2543                 codec->height = ost->filter->filter->inputs[0]->h;
2544                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2545                     ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option
2546                     av_mul_q(ost->frame_aspect_ratio, (AVRational){ codec->height, codec->width }) :
2547                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2548                 if (!strncmp(ost->enc->name, "libx264", 7) &&
2549                     codec->pix_fmt == AV_PIX_FMT_NONE &&
2550                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2551                     av_log(NULL, AV_LOG_WARNING,
2552                            "No pixel format specified, %s for H.264 encoding chosen.\n"
2553                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2554                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2555                 if (!strncmp(ost->enc->name, "mpeg2video", 10) &&
2556                     codec->pix_fmt == AV_PIX_FMT_NONE &&
2557                     ost->filter->filter->inputs[0]->format != AV_PIX_FMT_YUV420P)
2558                     av_log(NULL, AV_LOG_WARNING,
2559                            "No pixel format specified, %s for MPEG-2 encoding chosen.\n"
2560                            "Use -pix_fmt yuv420p for compatibility with outdated media players.\n",
2561                            av_get_pix_fmt_name(ost->filter->filter->inputs[0]->format));
2562                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2563
2564                 if (!icodec ||
2565                     codec->width   != icodec->width  ||
2566                     codec->height  != icodec->height ||
2567                     codec->pix_fmt != icodec->pix_fmt) {
2568                     codec->bits_per_raw_sample = frame_bits_per_raw_sample;
2569                 }
2570
2571                 if (ost->forced_keyframes) {
2572                     if (!strncmp(ost->forced_keyframes, "expr:", 5)) {
2573                         ret = av_expr_parse(&ost->forced_keyframes_pexpr, ost->forced_keyframes+5,
2574                                             forced_keyframes_const_names, NULL, NULL, NULL, NULL, 0, NULL);
2575                         if (ret < 0) {
2576                             av_log(NULL, AV_LOG_ERROR,
2577                                    "Invalid force_key_frames expression '%s'\n", ost->forced_keyframes+5);
2578                             return ret;
2579                         }
2580                         ost->forced_keyframes_expr_const_values[FKF_N] = 0;
2581                         ost->forced_keyframes_expr_const_values[FKF_N_FORCED] = 0;
2582                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_N] = NAN;
2583                         ost->forced_keyframes_expr_const_values[FKF_PREV_FORCED_T] = NAN;
2584                     } else {
2585                         parse_forced_key_frames(ost->forced_keyframes, ost, ost->st->codec);
2586                     }
2587                 }
2588                 break;
2589             case AVMEDIA_TYPE_SUBTITLE:
2590                 codec->time_base = (AVRational){1, 1000};
2591                 if (!codec->width) {
2592                     codec->width     = input_streams[ost->source_index]->st->codec->width;
2593                     codec->height    = input_streams[ost->source_index]->st->codec->height;
2594                 }
2595                 break;
2596             default:
2597                 abort();
2598                 break;
2599             }
2600             /* two pass mode */
2601             if (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
2602                 char logfilename[1024];
2603                 FILE *f;
2604
2605                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2606                          ost->logfile_prefix ? ost->logfile_prefix :
2607                                                DEFAULT_PASS_LOGFILENAME_PREFIX,
2608                          i);
2609                 if (!strcmp(ost->enc->name, "libx264")) {
2610                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2611                 } else {
2612                     if (codec->flags & CODEC_FLAG_PASS2) {
2613                         char  *logbuffer;
2614                         size_t logbuffer_size;
2615                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2616                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2617                                    logfilename);
2618                             exit_program(1);
2619                         }
2620                         codec->stats_in = logbuffer;
2621                     }
2622                     if (codec->flags & CODEC_FLAG_PASS1) {
2623                         f = av_fopen_utf8(logfilename, "wb");
2624                         if (!f) {
2625                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2626                                 logfilename, strerror(errno));
2627                             exit_program(1);
2628                         }
2629                         ost->logfile = f;
2630                     }
2631                 }
2632             }
2633         }
2634     }
2635
2636     /* open each encoder */
2637     for (i = 0; i < nb_output_streams; i++) {
2638         ost = output_streams[i];
2639         if (ost->encoding_needed) {
2640             AVCodec      *codec = ost->enc;
2641             AVCodecContext *dec = NULL;
2642
2643             if ((ist = get_input_stream(ost)))
2644                 dec = ist->st->codec;
2645             if (dec && dec->subtitle_header) {
2646                 /* ASS code assumes this buffer is null terminated so add extra byte. */
2647                 ost->st->codec->subtitle_header = av_mallocz(dec->subtitle_header_size + 1);
2648                 if (!ost->st->codec->subtitle_header) {
2649                     ret = AVERROR(ENOMEM);
2650                     goto dump_format;
2651                 }
2652                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2653                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2654             }
2655             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2656                 av_dict_set(&ost->opts, "threads", "auto", 0);
2657             if ((ret = avcodec_open2(ost->st->codec, codec, &ost->opts)) < 0) {
2658                 if (ret == AVERROR_EXPERIMENTAL)
2659                     abort_codec_experimental(codec, 1);
2660                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2661                         ost->file_index, ost->index);
2662                 goto dump_format;
2663             }
2664             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
2665                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
2666                 av_buffersink_set_frame_size(ost->filter->filter,
2667                                              ost->st->codec->frame_size);
2668             assert_avoptions(ost->opts);
2669             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2670                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2671                                              " It takes bits/s as argument, not kbits/s\n");
2672             extra_size += ost->st->codec->extradata_size;
2673         } else {
2674             av_opt_set_dict(ost->st->codec, &ost->opts);
2675         }
2676     }
2677
2678     /* init input streams */
2679     for (i = 0; i < nb_input_streams; i++)
2680         if ((ret = init_input_stream(i, error, sizeof(error))) < 0) {
2681             for (i = 0; i < nb_output_streams; i++) {
2682                 ost = output_streams[i];
2683                 avcodec_close(ost->st->codec);
2684             }
2685             goto dump_format;
2686         }
2687
2688     /* discard unused programs */
2689     for (i = 0; i < nb_input_files; i++) {
2690         InputFile *ifile = input_files[i];
2691         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2692             AVProgram *p = ifile->ctx->programs[j];
2693             int discard  = AVDISCARD_ALL;
2694
2695             for (k = 0; k < p->nb_stream_indexes; k++)
2696                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
2697                     discard = AVDISCARD_DEFAULT;
2698                     break;
2699                 }
2700             p->discard = discard;
2701         }
2702     }
2703
2704     /* open files and write file headers */
2705     for (i = 0; i < nb_output_files; i++) {
2706         oc = output_files[i]->ctx;
2707         oc->interrupt_callback = int_cb;
2708         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
2709             snprintf(error, sizeof(error),
2710                      "Could not write header for output file #%d "
2711                      "(incorrect codec parameters ?): %s",
2712                      i, av_err2str(ret));
2713             ret = AVERROR(EINVAL);
2714             goto dump_format;
2715         }
2716 //         assert_avoptions(output_files[i]->opts);
2717         if (strcmp(oc->oformat->name, "rtp")) {
2718             want_sdp = 0;
2719         }
2720     }
2721
2722  dump_format:
2723     /* dump the file output parameters - cannot be done before in case
2724        of stream copy */
2725     for (i = 0; i < nb_output_files; i++) {
2726         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
2727     }
2728
2729     /* dump the stream mapping */
2730     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2731     for (i = 0; i < nb_input_streams; i++) {
2732         ist = input_streams[i];
2733
2734         for (j = 0; j < ist->nb_filters; j++) {
2735             if (ist->filters[j]->graph->graph_desc) {
2736                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
2737                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
2738                        ist->filters[j]->name);
2739                 if (nb_filtergraphs > 1)
2740                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
2741                 av_log(NULL, AV_LOG_INFO, "\n");
2742             }
2743         }
2744     }
2745
2746     for (i = 0; i < nb_output_streams; i++) {
2747         ost = output_streams[i];
2748
2749         if (ost->attachment_filename) {
2750             /* an attached file */
2751             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2752                    ost->attachment_filename, ost->file_index, ost->index);
2753             continue;
2754         }
2755
2756         if (ost->filter && ost->filter->graph->graph_desc) {
2757             /* output from a complex graph */
2758             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
2759             if (nb_filtergraphs > 1)
2760                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
2761
2762             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
2763                    ost->index, ost->enc ? ost->enc->name : "?");
2764             continue;
2765         }
2766
2767         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2768                input_streams[ost->source_index]->file_index,
2769                input_streams[ost->source_index]->st->index,
2770                ost->file_index,
2771                ost->index);
2772         if (ost->sync_ist != input_streams[ost->source_index])
2773             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2774                    ost->sync_ist->file_index,
2775                    ost->sync_ist->st->index);
2776         if (ost->stream_copy)
2777             av_log(NULL, AV_LOG_INFO, " (copy)");
2778         else
2779             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
2780                    input_streams[ost->source_index]->dec->name : "?",
2781                    ost->enc ? ost->enc->name : "?");
2782         av_log(NULL, AV_LOG_INFO, "\n");
2783     }
2784
2785     if (ret) {
2786         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2787         return ret;
2788     }
2789
2790     if (want_sdp) {
2791         print_sdp();
2792     }
2793
2794     return 0;
2795 }
2796
2797 /* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
2798 static int need_output(void)
2799 {
2800     int i;
2801
2802     for (i = 0; i < nb_output_streams; i++) {
2803         OutputStream *ost    = output_streams[i];
2804         OutputFile *of       = output_files[ost->file_index];
2805         AVFormatContext *os  = output_files[ost->file_index]->ctx;
2806
2807         if (ost->finished ||
2808             (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2809             continue;
2810         if (ost->frame_number >= ost->max_frames) {
2811             int j;
2812             for (j = 0; j < of->ctx->nb_streams; j++)
2813                 close_output_stream(output_streams[of->ost_index + j]);
2814             continue;
2815         }
2816
2817         return 1;
2818     }
2819
2820     return 0;
2821 }
2822
2823 /**
2824  * Select the output stream to process.
2825  *
2826  * @return  selected output stream, or NULL if none available
2827  */
2828 static OutputStream *choose_output(void)
2829 {
2830     int i;
2831     int64_t opts_min = INT64_MAX;
2832     OutputStream *ost_min = NULL;
2833
2834     for (i = 0; i < nb_output_streams; i++) {
2835         OutputStream *ost = output_streams[i];
2836         int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
2837                                     AV_TIME_BASE_Q);
2838         if (!ost->unavailable && !ost->finished && opts < opts_min) {
2839             opts_min = opts;
2840             ost_min  = ost;
2841         }
2842     }
2843     return ost_min;
2844 }
2845
2846 static int check_keyboard_interaction(int64_t cur_time)
2847 {
2848     int i, ret, key;
2849     static int64_t last_time;
2850     if (received_nb_signals)
2851         return AVERROR_EXIT;
2852     /* read_key() returns 0 on EOF */
2853     if(cur_time - last_time >= 100000 && !run_as_daemon){
2854         key =  read_key();
2855         last_time = cur_time;
2856     }else
2857         key = -1;
2858     if (key == 'q')
2859         return AVERROR_EXIT;
2860     if (key == '+') av_log_set_level(av_log_get_level()+10);
2861     if (key == '-') av_log_set_level(av_log_get_level()-10);
2862     if (key == 's') qp_hist     ^= 1;
2863     if (key == 'h'){
2864         if (do_hex_dump){
2865             do_hex_dump = do_pkt_dump = 0;
2866         } else if(do_pkt_dump){
2867             do_hex_dump = 1;
2868         } else
2869             do_pkt_dump = 1;
2870         av_log_set_level(AV_LOG_DEBUG);
2871     }
2872     if (key == 'c' || key == 'C'){
2873         char buf[4096], target[64], command[256], arg[256] = {0};
2874         double time;
2875         int k, n = 0;
2876         fprintf(stderr, "\nEnter command: <target>|all <time>|-1 <command>[ <argument>]\n");
2877         i = 0;
2878         while ((k = read_key()) != '\n' && k != '\r' && i < sizeof(buf)-1)
2879             if (k > 0)
2880                 buf[i++] = k;
2881         buf[i] = 0;
2882         if (k > 0 &&
2883             (n = sscanf(buf, "%63[^ ] %lf %255[^ ] %255[^\n]", target, &time, command, arg)) >= 3) {
2884             av_log(NULL, AV_LOG_DEBUG, "Processing command target:%s time:%f command:%s arg:%s",
2885                    target, time, command, arg);
2886             for (i = 0; i < nb_filtergraphs; i++) {
2887                 FilterGraph *fg = filtergraphs[i];
2888                 if (fg->graph) {
2889                     if (time < 0) {
2890                         ret = avfilter_graph_send_command(fg->graph, target, command, arg, buf, sizeof(buf),
2891                                                           key == 'c' ? AVFILTER_CMD_FLAG_ONE : 0);
2892                         fprintf(stderr, "Command reply for stream %d: ret:%d res:\n%s", i, ret, buf);
2893                     } else if (key == 'c') {
2894                         fprintf(stderr, "Queing commands only on filters supporting the specific command is unsupported\n");
2895                         ret = AVERROR_PATCHWELCOME;
2896                     } else {
2897                         ret = avfilter_graph_queue_command(fg->graph, target, command, arg, 0, time);
2898                     }
2899                 }
2900             }
2901         } else {
2902             av_log(NULL, AV_LOG_ERROR,
2903                    "Parse error, at least 3 arguments were expected, "
2904                    "only %d given in string '%s'\n", n, buf);
2905         }
2906     }
2907     if (key == 'd' || key == 'D'){
2908         int debug=0;
2909         if(key == 'D') {
2910             debug = input_streams[0]->st->codec->debug<<1;
2911             if(!debug) debug = 1;
2912             while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
2913                 debug += debug;
2914         }else
2915             if(scanf("%d", &debug)!=1)
2916                 fprintf(stderr,"error parsing debug value\n");
2917         for(i=0;i<nb_input_streams;i++) {
2918             input_streams[i]->st->codec->debug = debug;
2919         }
2920         for(i=0;i<nb_output_streams;i++) {
2921             OutputStream *ost = output_streams[i];
2922             ost->st->codec->debug = debug;
2923         }
2924         if(debug) av_log_set_level(AV_LOG_DEBUG);
2925         fprintf(stderr,"debug=%d\n", debug);
2926     }
2927     if (key == '?'){
2928         fprintf(stderr, "key    function\n"
2929                         "?      show this help\n"
2930                         "+      increase verbosity\n"
2931                         "-      decrease verbosity\n"
2932                         "c      Send command to first matching filter supporting it\n"
2933                         "C      Send/Que command to all matching filters\n"
2934                         "D      cycle through available debug modes\n"
2935                         "h      dump packets/hex press to cycle through the 3 states\n"
2936                         "q      quit\n"
2937                         "s      Show QP histogram\n"
2938         );
2939     }
2940     return 0;
2941 }
2942
2943 #if HAVE_PTHREADS
2944 static void *input_thread(void *arg)
2945 {
2946     InputFile *f = arg;
2947     int ret = 0;
2948
2949     while (!transcoding_finished && ret >= 0) {
2950         AVPacket pkt;
2951         ret = av_read_frame(f->ctx, &pkt);
2952
2953         if (ret == AVERROR(EAGAIN)) {
2954             av_usleep(10000);
2955             ret = 0;
2956             continue;
2957         } else if (ret < 0)
2958             break;
2959
2960         pthread_mutex_lock(&f->fifo_lock);
2961         while (!av_fifo_space(f->fifo))
2962             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
2963
2964         av_dup_packet(&pkt);
2965         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
2966         pthread_cond_signal(&f->fifo_cond);
2967
2968         pthread_mutex_unlock(&f->fifo_lock);
2969     }
2970
2971     pthread_mutex_lock(&f->fifo_lock);
2972     f->finished = 1;
2973     pthread_cond_signal(&f->fifo_cond);
2974     pthread_mutex_unlock(&f->fifo_lock);
2975     return NULL;
2976 }
2977
2978 static void free_input_threads(void)
2979 {
2980     int i;
2981
2982     if (nb_input_files == 1)
2983         return;
2984
2985     transcoding_finished = 1;
2986
2987     for (i = 0; i < nb_input_files; i++) {
2988         InputFile *f = input_files[i];
2989         AVPacket pkt;
2990
2991         if (!f->fifo || f->joined)
2992             continue;
2993
2994         pthread_mutex_lock(&f->fifo_lock);
2995         while (av_fifo_size(f->fifo)) {
2996             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
2997             av_free_packet(&pkt);
2998         }
2999         pthread_cond_signal(&f->fifo_cond);
3000         pthread_mutex_unlock(&f->fifo_lock);
3001
3002         pthread_join(f->thread, NULL);
3003         f->joined = 1;
3004
3005         while (av_fifo_size(f->fifo)) {
3006             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
3007             av_free_packet(&pkt);
3008         }
3009         av_fifo_free(f->fifo);
3010     }
3011 }
3012
3013 static int init_input_threads(void)
3014 {
3015     int i, ret;
3016
3017     if (nb_input_files == 1)
3018         return 0;
3019
3020     for (i = 0; i < nb_input_files; i++) {
3021         InputFile *f = input_files[i];
3022
3023         if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
3024             return AVERROR(ENOMEM);
3025
3026         if (f->ctx->pb ? !f->ctx->pb->seekable :
3027             strcmp(f->ctx->iformat->name, "lavfi"))
3028             f->non_blocking = 1;
3029
3030         pthread_mutex_init(&f->fifo_lock, NULL);
3031         pthread_cond_init (&f->fifo_cond, NULL);
3032
3033         if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
3034             return AVERROR(ret);
3035     }
3036     return 0;
3037 }
3038
3039 static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
3040 {
3041     int ret = 0;
3042
3043     pthread_mutex_lock(&f->fifo_lock);
3044
3045     while (1) {
3046     if (av_fifo_size(f->fifo)) {
3047         av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
3048         pthread_cond_signal(&f->fifo_cond);
3049         break;
3050     } else {
3051         if (f->finished) {
3052             ret = AVERROR_EOF;
3053             break;
3054         }
3055         if (f->non_blocking) {
3056             ret = AVERROR(EAGAIN);
3057             break;
3058         }
3059         pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
3060     }
3061     }
3062
3063     pthread_mutex_unlock(&f->fifo_lock);
3064
3065     return ret;
3066 }
3067 #endif
3068
3069 static int get_input_packet(InputFile *f, AVPacket *pkt)
3070 {
3071     if (f->rate_emu) {
3072         int i;
3073         for (i = 0; i < f->nb_streams; i++) {
3074             InputStream *ist = input_streams[f->ist_index + i];
3075             int64_t pts = av_rescale(ist->dts, 1000000, AV_TIME_BASE);
3076             int64_t now = av_gettime() - ist->start;
3077             if (pts > now)
3078                 return AVERROR(EAGAIN);
3079         }
3080     }
3081
3082 #if HAVE_PTHREADS
3083     if (nb_input_files > 1)
3084         return get_input_packet_mt(f, pkt);
3085 #endif
3086     return av_read_frame(f->ctx, pkt);
3087 }
3088
3089 static int got_eagain(void)
3090 {
3091     int i;
3092     for (i = 0; i < nb_output_streams; i++)
3093         if (output_streams[i]->unavailable)
3094             return 1;
3095     return 0;
3096 }
3097
3098 static void reset_eagain(void)
3099 {
3100     int i;
3101     for (i = 0; i < nb_input_files; i++)
3102         input_files[i]->eagain = 0;
3103     for (i = 0; i < nb_output_streams; i++)
3104         output_streams[i]->unavailable = 0;
3105 }
3106
3107 /*
3108  * Return
3109  * - 0 -- one packet was read and processed
3110  * - AVERROR(EAGAIN) -- no packets were available for selected file,
3111  *   this function should be called again
3112  * - AVERROR_EOF -- this function should not be called again
3113  */
3114 static int process_input(int file_index)
3115 {
3116     InputFile *ifile = input_files[file_index];
3117     AVFormatContext *is;
3118     InputStream *ist;
3119     AVPacket pkt;
3120     int ret, i, j;
3121
3122     is  = ifile->ctx;
3123     ret = get_input_packet(ifile, &pkt);
3124
3125     if (ret == AVERROR(EAGAIN)) {
3126         ifile->eagain = 1;
3127         return ret;
3128     }
3129     if (ret < 0) {
3130         if (ret != AVERROR_EOF) {
3131             print_error(is->filename, ret);
3132             if (exit_on_error)
3133                 exit_program(1);
3134         }
3135         ifile->eof_reached = 1;
3136
3137         for (i = 0; i < ifile->nb_streams; i++) {
3138             ist = input_streams[ifile->ist_index + i];
3139             if (ist->decoding_needed)
3140                 output_packet(ist, NULL);
3141
3142             /* mark all outputs that don't go through lavfi as finished */
3143             for (j = 0; j < nb_output_streams; j++) {
3144                 OutputStream *ost = output_streams[j];
3145
3146                 if (ost->source_index == ifile->ist_index + i &&
3147                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
3148                     close_output_stream(ost);
3149             }
3150         }
3151
3152         return AVERROR(EAGAIN);
3153     }
3154
3155     reset_eagain();
3156
3157     if (do_pkt_dump) {
3158         av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
3159                          is->streams[pkt.stream_index]);
3160     }
3161     /* the following test is needed in case new streams appear
3162        dynamically in stream : we ignore them */
3163     if (pkt.stream_index >= ifile->nb_streams) {
3164         report_new_stream(file_index, &pkt);
3165         goto discard_packet;
3166     }
3167
3168     ist = input_streams[ifile->ist_index + pkt.stream_index];
3169     if (ist->discard)
3170         goto discard_packet;
3171
3172     if (debug_ts) {
3173         av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
3174                "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",
3175                ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->st->codec->codec_type),
3176                av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &AV_TIME_BASE_Q),
3177                av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &AV_TIME_BASE_Q),
3178                av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3179                av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3180                av_ts2str(input_files[ist->file_index]->ts_offset),
3181                av_ts2timestr(input_files[ist->file_index]->ts_offset, &AV_TIME_BASE_Q));
3182     }
3183
3184     if(!ist->wrap_correction_done && is->start_time != AV_NOPTS_VALUE && ist->st->pts_wrap_bits < 64){
3185         int64_t stime, stime2;
3186         // Correcting starttime based on the enabled streams
3187         // 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.
3188         //       so we instead do it here as part of discontinuity handling
3189         if (   ist->next_dts == AV_NOPTS_VALUE
3190             && ifile->ts_offset == -is->start_time
3191             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
3192             int64_t new_start_time = INT64_MAX;
3193             for (i=0; i<is->nb_streams; i++) {
3194                 AVStream *st = is->streams[i];
3195                 if(st->discard == AVDISCARD_ALL || st->start_time == AV_NOPTS_VALUE)
3196                     continue;
3197                 new_start_time = FFMIN(new_start_time, av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q));
3198             }
3199             if (new_start_time > is->start_time) {
3200                 av_log(is, AV_LOG_VERBOSE, "Correcting start time by %"PRId64"\n", new_start_time - is->start_time);
3201                 ifile->ts_offset = -new_start_time;
3202             }
3203         }
3204
3205         stime = av_rescale_q(is->start_time, AV_TIME_BASE_Q, ist->st->time_base);
3206         stime2= stime + (1ULL<<ist->st->pts_wrap_bits);
3207         ist->wrap_correction_done = 1;
3208
3209         if(stime2 > stime && pkt.dts != AV_NOPTS_VALUE && pkt.dts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
3210             pkt.dts -= 1ULL<<ist->st->pts_wrap_bits;
3211             ist->wrap_correction_done = 0;
3212         }
3213         if(stime2 > stime && pkt.pts != AV_NOPTS_VALUE && pkt.pts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
3214             pkt.pts -= 1ULL<<ist->st->pts_wrap_bits;
3215             ist->wrap_correction_done = 0;
3216         }
3217     }
3218
3219     if (pkt.dts != AV_NOPTS_VALUE)
3220         pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3221     if (pkt.pts != AV_NOPTS_VALUE)
3222         pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
3223
3224     if (pkt.pts != AV_NOPTS_VALUE)
3225         pkt.pts *= ist->ts_scale;
3226     if (pkt.dts != AV_NOPTS_VALUE)
3227         pkt.dts *= ist->ts_scale;
3228
3229     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts == AV_NOPTS_VALUE && !copy_ts
3230         && (is->iformat->flags & AVFMT_TS_DISCONT) && ifile->last_ts != AV_NOPTS_VALUE) {
3231         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3232         int64_t delta   = pkt_dts - ifile->last_ts;
3233         if(delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3234             (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3235                 ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)){
3236             ifile->ts_offset -= delta;
3237             av_log(NULL, AV_LOG_DEBUG,
3238                    "Inter stream timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3239                    delta, ifile->ts_offset);
3240             pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3241             if (pkt.pts != AV_NOPTS_VALUE)
3242                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3243         }
3244     }
3245
3246     if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
3247         !copy_ts) {
3248         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3249         int64_t delta   = pkt_dts - ist->next_dts;
3250         if (is->iformat->flags & AVFMT_TS_DISCONT) {
3251             if (delta < -1LL*dts_delta_threshold*AV_TIME_BASE ||
3252                 (delta > 1LL*dts_delta_threshold*AV_TIME_BASE &&
3253                  ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) ||
3254                 pkt_dts + AV_TIME_BASE/10 < FFMAX(ist->pts, ist->dts)) {
3255                 ifile->ts_offset -= delta;
3256                 av_log(NULL, AV_LOG_DEBUG,
3257                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3258                        delta, ifile->ts_offset);
3259                 pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3260                 if (pkt.pts != AV_NOPTS_VALUE)
3261                     pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3262             }
3263         } else {
3264             if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3265                 (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)) {
3266                 av_log(NULL, AV_LOG_WARNING, "DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n", pkt.dts, ist->next_dts, pkt.stream_index);
3267                 pkt.dts = AV_NOPTS_VALUE;
3268             }
3269             if (pkt.pts != AV_NOPTS_VALUE){
3270                 int64_t pkt_pts = av_rescale_q(pkt.pts, ist->st->time_base, AV_TIME_BASE_Q);
3271                 delta   = pkt_pts - ist->next_dts;
3272                 if ( delta < -1LL*dts_error_threshold*AV_TIME_BASE ||
3273                     (delta > 1LL*dts_error_threshold*AV_TIME_BASE && ist->st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)) {
3274                     av_log(NULL, AV_LOG_WARNING, "PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n", pkt.pts, ist->next_dts, pkt.stream_index);
3275                     pkt.pts = AV_NOPTS_VALUE;
3276                 }
3277             }
3278         }
3279     }
3280
3281     if (pkt.dts != AV_NOPTS_VALUE)
3282         ifile->last_ts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3283
3284     if (debug_ts) {
3285         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",
3286                ifile->ist_index + pkt.stream_index, av_get_media_type_string(ist->st->codec->codec_type),
3287                av_ts2str(pkt.pts), av_ts2timestr(pkt.pts, &ist->st->time_base),
3288                av_ts2str(pkt.dts), av_ts2timestr(pkt.dts, &ist->st->time_base),
3289                av_ts2str(input_files[ist->file_index]->ts_offset),
3290                av_ts2timestr(input_files[ist->file_index]->ts_offset, &AV_TIME_BASE_Q));
3291     }
3292
3293     sub2video_heartbeat(ist, pkt.pts);
3294
3295     ret = output_packet(ist, &pkt);
3296     if (ret < 0) {
3297         av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d: %s\n",
3298                ist->file_index, ist->st->index, av_err2str(ret));
3299         if (exit_on_error)
3300             exit_program(1);
3301     }
3302
3303 discard_packet:
3304     av_free_packet(&pkt);
3305
3306     return 0;
3307 }
3308
3309 /**
3310  * Perform a step of transcoding for the specified filter graph.
3311  *
3312  * @param[in]  graph     filter graph to consider
3313  * @param[out] best_ist  input stream where a frame would allow to continue
3314  * @return  0 for success, <0 for error
3315  */
3316 static int transcode_from_filter(FilterGraph *graph, InputStream **best_ist)
3317 {
3318     int i, ret;
3319     int nb_requests, nb_requests_max = 0;
3320     InputFilter *ifilter;
3321     InputStream *ist;
3322
3323     *best_ist = NULL;
3324     ret = avfilter_graph_request_oldest(graph->graph);
3325     if (ret >= 0)
3326         return reap_filters();
3327
3328     if (ret == AVERROR_EOF) {
3329         ret = reap_filters();
3330         for (i = 0; i < graph->nb_outputs; i++)
3331             close_output_stream(graph->outputs[i]->ost);
3332         return ret;
3333     }
3334     if (ret != AVERROR(EAGAIN))
3335         return ret;
3336
3337     for (i = 0; i < graph->nb_inputs; i++) {
3338         ifilter = graph->inputs[i];
3339         ist = ifilter->ist;
3340         if (input_files[ist->file_index]->eagain ||
3341             input_files[ist->file_index]->eof_reached)
3342             continue;
3343         nb_requests = av_buffersrc_get_nb_failed_requests(ifilter->filter);
3344         if (nb_requests > nb_requests_max) {
3345             nb_requests_max = nb_requests;
3346             *best_ist = ist;
3347         }
3348     }
3349
3350     if (!*best_ist)
3351         for (i = 0; i < graph->nb_outputs; i++)
3352             graph->outputs[i]->ost->unavailable = 1;
3353
3354     return 0;
3355 }
3356
3357 /**
3358  * Run a single step of transcoding.
3359  *
3360  * @return  0 for success, <0 for error
3361  */
3362 static int transcode_step(void)
3363 {
3364     OutputStream *ost;
3365     InputStream  *ist;
3366     int ret;
3367
3368     ost = choose_output();
3369     if (!ost) {
3370         if (got_eagain()) {
3371             reset_eagain();
3372             av_usleep(10000);
3373             return 0;
3374         }
3375         av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
3376         return AVERROR_EOF;
3377     }
3378
3379     if (ost->filter) {
3380         if ((ret = transcode_from_filter(ost->filter->graph, &ist)) < 0)
3381             return ret;
3382         if (!ist)
3383             return 0;
3384     } else {
3385         av_assert0(ost->source_index >= 0);
3386         ist = input_streams[ost->source_index];
3387     }
3388
3389     ret = process_input(ist->file_index);
3390     if (ret == AVERROR(EAGAIN)) {
3391         if (input_files[ist->file_index]->eagain)
3392             ost->unavailable = 1;
3393         return 0;
3394     }
3395     if (ret < 0)
3396         return ret == AVERROR_EOF ? 0 : ret;
3397
3398     return reap_filters();
3399 }
3400
3401 /*
3402  * The following code is the main loop of the file converter
3403  */
3404 static int transcode(void)
3405 {
3406     int ret, i;
3407     AVFormatContext *os;
3408     OutputStream *ost;
3409     InputStream *ist;
3410     int64_t timer_start;
3411
3412     ret = transcode_init();
3413     if (ret < 0)
3414         goto fail;
3415
3416     if (stdin_interaction) {
3417         av_log(NULL, AV_LOG_INFO, "Press [q] to stop, [?] for help\n");
3418     }
3419
3420     timer_start = av_gettime();
3421
3422 #if HAVE_PTHREADS
3423     if ((ret = init_input_threads()) < 0)
3424         goto fail;
3425 #endif
3426
3427     while (!received_sigterm) {
3428         int64_t cur_time= av_gettime();
3429
3430         /* if 'q' pressed, exits */
3431         if (stdin_interaction)
3432             if (check_keyboard_interaction(cur_time) < 0)
3433                 break;
3434
3435         /* check if there's any stream where output is still needed */
3436         if (!need_output()) {
3437             av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
3438             break;
3439         }
3440
3441         ret = transcode_step();
3442         if (ret < 0) {
3443             if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
3444                 continue;
3445
3446             av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
3447             break;
3448         }
3449
3450         /* dump report by using the output first video and audio streams */
3451         print_report(0, timer_start, cur_time);
3452     }
3453 #if HAVE_PTHREADS
3454     free_input_threads();
3455 #endif
3456
3457     /* at the end of stream, we must flush the decoder buffers */
3458     for (i = 0; i < nb_input_streams; i++) {
3459         ist = input_streams[i];
3460         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3461             output_packet(ist, NULL);
3462         }
3463     }
3464     flush_encoders();
3465
3466     term_exit();
3467
3468     /* write the trailer if needed and close file */
3469     for (i = 0; i < nb_output_files; i++) {
3470         os = output_files[i]->ctx;
3471         av_write_trailer(os);
3472     }
3473
3474     /* dump report by using the first video and audio streams */
3475     print_report(1, timer_start, av_gettime());
3476
3477     /* close each encoder */
3478     for (i = 0; i < nb_output_streams; i++) {
3479         ost = output_streams[i];
3480         if (ost->encoding_needed) {
3481             av_freep(&ost->st->codec->stats_in);
3482             avcodec_close(ost->st->codec);
3483         }
3484     }
3485
3486     /* close each decoder */
3487     for (i = 0; i < nb_input_streams; i++) {
3488         ist = input_streams[i];
3489         if (ist->decoding_needed) {
3490             avcodec_close(ist->st->codec);
3491             if (ist->hwaccel_uninit)
3492                 ist->hwaccel_uninit(ist->st->codec);
3493         }
3494     }
3495
3496     /* finished ! */
3497     ret = 0;
3498
3499  fail:
3500 #if HAVE_PTHREADS
3501     free_input_threads();
3502 #endif
3503
3504     if (output_streams) {
3505         for (i = 0; i < nb_output_streams; i++) {
3506             ost = output_streams[i];
3507             if (ost) {
3508                 if (ost->stream_copy)
3509                     av_freep(&ost->st->codec->extradata);
3510                 if (ost->logfile) {
3511                     fclose(ost->logfile);
3512                     ost->logfile = NULL;
3513                 }
3514                 av_freep(&ost->st->codec->subtitle_header);
3515                 av_freep(&ost->forced_kf_pts);
3516                 av_freep(&ost->apad);
3517                 av_dict_free(&ost->opts);
3518                 av_dict_free(&ost->swr_opts);
3519                 av_dict_free(&ost->resample_opts);
3520             }
3521         }
3522     }
3523     return ret;
3524 }
3525
3526
3527 static int64_t getutime(void)
3528 {
3529 #if HAVE_GETRUSAGE
3530     struct rusage rusage;
3531
3532     getrusage(RUSAGE_SELF, &rusage);
3533     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
3534 #elif HAVE_GETPROCESSTIMES
3535     HANDLE proc;
3536     FILETIME c, e, k, u;
3537     proc = GetCurrentProcess();
3538     GetProcessTimes(proc, &c, &e, &k, &u);
3539     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
3540 #else
3541     return av_gettime();
3542 #endif
3543 }
3544
3545 static int64_t getmaxrss(void)
3546 {
3547 #if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
3548     struct rusage rusage;
3549     getrusage(RUSAGE_SELF, &rusage);
3550     return (int64_t)rusage.ru_maxrss * 1024;
3551 #elif HAVE_GETPROCESSMEMORYINFO
3552     HANDLE proc;
3553     PROCESS_MEMORY_COUNTERS memcounters;
3554     proc = GetCurrentProcess();
3555     memcounters.cb = sizeof(memcounters);
3556     GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
3557     return memcounters.PeakPagefileUsage;
3558 #else
3559     return 0;
3560 #endif
3561 }
3562
3563 static void log_callback_null(void *ptr, int level, const char *fmt, va_list vl)
3564 {
3565 }
3566
3567 int main(int argc, char **argv)
3568 {
3569     int ret;
3570     int64_t ti;
3571
3572     register_exit(ffmpeg_cleanup);
3573
3574     setvbuf(stderr,NULL,_IONBF,0); /* win32 runtime needs this */
3575
3576     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3577     parse_loglevel(argc, argv, options);
3578
3579     if(argc>1 && !strcmp(argv[1], "-d")){
3580         run_as_daemon=1;
3581         av_log_set_callback(log_callback_null);
3582         argc--;
3583         argv++;
3584     }
3585
3586     avcodec_register_all();
3587 #if CONFIG_AVDEVICE
3588     avdevice_register_all();
3589 #endif
3590     avfilter_register_all();
3591     av_register_all();
3592     avformat_network_init();
3593
3594     show_banner(argc, argv, options);
3595
3596     term_init();
3597
3598     /* parse options and open all input/output files */
3599     ret = ffmpeg_parse_options(argc, argv);
3600     if (ret < 0)
3601         exit_program(1);
3602
3603     if (nb_output_files <= 0 && nb_input_files == 0) {
3604         show_usage();
3605         av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3606         exit_program(1);
3607     }
3608
3609     /* file converter / grab */
3610     if (nb_output_files <= 0) {
3611         av_log(NULL, AV_LOG_FATAL, "At least one output file must be specified\n");
3612         exit_program(1);
3613     }
3614
3615 //     if (nb_input_files == 0) {
3616 //         av_log(NULL, AV_LOG_FATAL, "At least one input file must be specified\n");
3617 //         exit_program(1);
3618 //     }
3619
3620     current_time = ti = getutime();
3621     if (transcode() < 0)
3622         exit_program(1);
3623     ti = getutime() - ti;
3624     if (do_benchmark) {
3625         printf("bench: utime=%0.3fs\n", ti / 1000000.0);
3626     }
3627     av_log(NULL, AV_LOG_DEBUG, "%"PRIu64" frames successfully decoded, %"PRIu64" decoding errors\n",
3628            decode_error_stat[0], decode_error_stat[1]);
3629     if ((decode_error_stat[0] + decode_error_stat[1]) * max_error_rate < decode_error_stat[1])
3630         exit_program(69);
3631
3632     exit_program(received_nb_signals ? 255 : main_return_code);
3633     return main_return_code;
3634 }