[FFmpeg-trac] #1828(undetermined:new): Start timestamp ignored when muxing dvd_subtitle

[FFmpeg]

#1828: Start timestamp ignored when muxing dvd_subtitle
-------------------------------------+-------------------------------------
             Reporter:  billie       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 When adding a dvd_subtitle to a video file the starting time-stamp is
 ignored which causes all subsequent subtitles to be displayed to early by
 this time-stamp. I will attach a sample video file and the
 subtitle.idx/sub files. The subtitle file contains three subtitles
 starting after 5, 15 and 25 seconds with a duration of 2 seconds. When
 playing the resulting video file including the subtitle the subtitles are
 displayed after 0, 10 and 20 seconds.


 The following command line can be used to reproduce the issue:

 ffmpeg -i test.mkv -i subtitle.sub -map 0 -map 1 -c: copy -f matroska
 test_subs.mkv

 ffmpeg version N-45643-g6a762b6 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Oct 17 2012 17:29:33 with gcc 4.5.4 (Gentoo 4.5.4 p1.0,
 pie-0.4.7)
   configuration: --cc=i686-pc-linux-gnu-gcc --cxx=i686-pc-linux-gnu-g++
 --ar=i686-pc-linux-gnu-ar --optflags='-march=native -O2 -pipe -fomit-
 frame-pointer' --extra-cflags='-march=native -O2 -pipe -fomit-frame-
 pointer' --extra-cxxflags='-march=native -O2 -pipe -fomit-frame-pointer'
 --enable-gpl --enable-version3 --enable-postproc --enable-avfilter
 --disable-stripping --disable-debug --disable-doc --disable-vdpau
 --disable-ffplay --enable-gnutls --enable-libmp3lame --enable-libvo-aacenc
 --enable-libvo-amrwbenc --enable-libtheora --enable-libvorbis --enable-
 libx264 --enable-libxvid --enable-libaacplus --enable-nonfree --enable-
 libfaac --enable-nonfree --enable-libcdio --enable-libdc1394 --enable-
 openal --disable-indev=v4l --disable-indev=jack --enable-x11grab --enable-
 libv4l2 --disable-outdev=sdl --enable-frei0r --enable-libfreetype
 --enable-libass --enable-pthreads --enable-libopencore-amrwb --enable-
 libopencore-amrnb --enable-libgsm --enable-libmodplug --enable-
 libschroedinger --enable-libspeex --enable-libvp  libavutil      51.
 76.100 / 51. 76.100
   libavcodec     54. 66.100 / 54. 66.100
   libavformat    54. 33.100 / 54. 33.100
   libavdevice    54.  3.100 / 54.  3.100
   libavfilter     3. 19.103 /  3. 19.103
   libswscale      2.  1.101 /  2.  1.101
   libswresample   0. 16.100 /  0. 16.100
   libpostproc    52.  1.100 / 52.  1.100
 Input #0, matroska,webm, from 'test.mkv':
   Metadata:
     ENCODER         : Lavf53.32.100
   Duration: 00:00:30.01, start: 0.000000, bitrate: 38 kb/s
     Stream #0:0: Video: h264 (High), yuv420p, 320x240, SAR 1:1 DAR 4:3, 25
 fps, 25 tbr, 1k tbn, 50 tbc (default)
     Stream #0:1: Audio: ac3, 48000 Hz, stereo, s16, 32 kb/s (default)
 Input #1, mpeg, from 'subtitle.sub':
   Duration: 00:00:20.00, start: 5.079989, bitrate: 2 kb/s
     Stream #1:0[0x20]: Subtitle: dvd_subtitle
 Output #0, matroska, to 'test_subs.mkv':
   Metadata:
     encoder         : Lavf54.33.100
     Stream #0:0: Video: h264, yuv420p, 320x240 [SAR 1:1 DAR 4:3], q=2-31,
 25 fps, 1k tbn, 1k tbc (default)
     Stream #0:1: Audio: ac3, 48000 Hz, stereo, 32 kb/s (default)
     Stream #0:2: Subtitle: dvd_subtitle
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #0:1 -> #0:1 (copy)
   Stream #1:0 -> #0:2 (copy)
 Press [q] to stop, [?] for help
 frame=  750 fps=0.0 q=-1.0 Lsize=     143kB time=00:00:30.01 bitrate=
 39.0kbits/s
 video:13kB audio:117kB subtitle:1 global headers:0kB muxing overhead
 8.907932%

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1828>
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