[FFmpeg-trac] #598(avformat:open): Subtitle on some BD/m2ts files are not handle.

FFmpeg trac at avcodec.org
Wed Jul 25 07:55:28 CEST 2012

#598: Subtitle on some BD/m2ts files are not handle.
             Reporter:  Sebastiii    |                    Owner:  michael
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  subtitle     |               Blocked By:
  m2ts pmt bluray                    |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |

Comment (by cehoyos):

 Replying to [comment:7 cehoyos]:
 > I see three different problems with the BD stream you provided:
 > First, subtitle streams (0x120x) start late and are not detected by
 ffmpeg -i. The same happens for the DVD stream. Since (subtitle) streams
 can start at any point while playing back, but not every user wants a
 whole file to be scanned when starting ffmpeg, I do not think there is an
 easy solution. Note that the DVD stream plays as expected with mplayer
 -demuxer lavf -sid 0 (and ffplay with "t").
 > At least ffmpeg -analyzeduration 2000000000 -i stream and ffplay stream
 -sst 0 should work, both currently fail.
 The subtitles in the dvd-stream can be detected with:
 $ ffmpeg -probesize 60M -analyzeduration 60M -i Hop_no_subs_detected.vob
 This seems mostly expected behaviour.
 Without the CRC problem, something similar is possible with the Bluray

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/598#comment:19>
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