[FFmpeg-trac] #862(FFmpeg:closed): Corrupted subtitles exported from matroska file.

[FFmpeg]

#862: Corrupted subtitles exported from matroska file.
----------------------------------------+----------------------------------
             Reporter:  vlada.matena    |                    Owner:
                 Type:  defect          |                   Status:  closed
             Priority:  normal          |                Component:  FFmpeg
              Version:  git-master      |               Resolution:  fixed
             Keywords:  text subtitles  |               Blocked By:
             Blocking:                  |  Reproduced by developer:  1
Analyzed by developer:  0               |
----------------------------------------+----------------------------------
Changes (by ubitux):

 * status:  open => closed
 * resolution:   => fixed


Comment:

 This bug has likely been fixed with all the work we did on subtitles.

 Re-encode:
 {{{
 % ./ffmpeg -i ~/source.mkv -y out.srt
 ffmpeg version N-48391-g1e28fa2 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Jan  2 2013 08:03:04 with gcc 4.7.2 (GCC)
   configuration: --enable-gpl --enable-libx264 --enable-libmp3lame
 --enable-x11grab --enable-libvorbis
   libavutil      52. 13.100 / 52. 13.100
   libavcodec     54. 85.100 / 54. 85.100
   libavformat    54. 59.100 / 54. 59.100
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 30.102 /  3. 30.102
   libswscale      2.  1.103 /  2.  1.103
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, matroska,webm, from '/home/ubitux/source.mkv':
   Metadata:
     ENCODER         : Lavf53.29.100
   Duration: 00:00:05.02, start: 0.000000, bitrate: 434 kb/s
     Stream #0:0: Video: h264 (High), yuv420p, 624x352 [SAR 1:1 DAR 39:22],
 23.98 fps, 23.98 tbr, 1k tbn, 47.96 tbc (default)
     Stream #0:1(eng): Audio: vorbis, 48000 Hz, stereo, fltp (default)
     Stream #0:2(cze): Subtitle: subrip (default)
 Output #0, srt, to 'out.srt':
   Metadata:
     encoder         : Lavf54.59.100
     Stream #0:0(cze): Subtitle: subrip (default)
 Stream mapping:
   Stream #0:2 -> #0:0 (subrip -> subrip)
 Press [q] to stop, [?] for help
 size=       0kB time=00:00:03.48 bitrate=   0.4kbits/s
 video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 58.620690%
 }}}

 {{{
 % cat out.srt
 1
 00:00:00,601 --> 00:00:00,601
 Takže když foton narazí
 na desku se dvěma štěrbinami

 2
 00:00:03,485 --> 00:00:03,485
 a obě ty štěrbiny pozoruješ,
 neprojde oběma naráz.

 }}}

 Stream copy:
 {{{
 [~/src/ffmpeg]☭ ./ffmpeg -i ~/source.mkv -c copy -y out.srt
 ffmpeg version N-48391-g1e28fa2 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Jan  2 2013 08:03:04 with gcc 4.7.2 (GCC)
   configuration: --enable-gpl --enable-libx264 --enable-libmp3lame
 --enable-x11grab --enable-libvorbis
   libavutil      52. 13.100 / 52. 13.100
   libavcodec     54. 85.100 / 54. 85.100
   libavformat    54. 59.100 / 54. 59.100
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 30.102 /  3. 30.102
   libswscale      2.  1.103 /  2.  1.103
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, matroska,webm, from '/home/ubitux/source.mkv':
   Metadata:
     ENCODER         : Lavf53.29.100
   Duration: 00:00:05.02, start: 0.000000, bitrate: 434 kb/s
     Stream #0:0: Video: h264 (High), yuv420p, 624x352 [SAR 1:1 DAR 39:22],
 23.98 fps, 23.98 tbr, 1k tbn, 47.96 tbc (default)
     Stream #0:1(eng): Audio: vorbis, 48000 Hz, stereo, fltp (default)
     Stream #0:2(cze): Subtitle: subrip (default)
 Output #0, srt, to 'out.srt':
   Metadata:
     encoder         : Lavf54.59.100
     Stream #0:0(cze): Subtitle: subrip (default)
 Stream mapping:
   Stream #0:2 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 size=       0kB time=00:00:03.48 bitrate=   0.4kbits/s
 video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 58.620690%
 }}}

 {{{
 % cat out.srt
 1
 00:00:00,601 --> 00:00:00,601
 Takže když foton narazí
 na desku se dvěma štěrbinami

 2
 00:00:03,485 --> 00:00:03,485
 a obě ty štěrbiny pozoruješ,
 neprojde oběma naráz.

 }}}

 Feel free to re-open if something is still wrong.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/862#comment:6>
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