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