[FFmpeg-trac] #8064(undetermined:new): doesn't see full VOB track

FFmpeg trac at avcodec.org
Wed Aug 7 18:37:48 EEST 2019

#8064: doesn't see full VOB track
             Reporter:               |                    Owner:
  brianjmurrell                      |
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by brianjmurrell):

 Replying to [comment:9 mkver]:
 > 1. Who says that VLC not simply uses another file without ever telling

 Like what other file?  I think all of the evidence here is more than just
 suggesting that the track's real duration is ~57 minutes, not the ~54 (and
 a short transcode) that ffmpeg is reporting.

 > 2. This point has been asked to distinguish between a bug in the part
 that estimates a file's duration and the actual demuxer (it is possible
 for remuxing with ffmpeg to yield a file with a different length than the
 initial estimate).

 Yes, but the resulting file is also truncated.  To be honest, I couldn't
 really care any less what any tool says what the duration of the file is.
 What I care about is that ffmpeg is producing a truncated transcode.  The
 durations are just being used as indicators that ffmpeg is not reading or
 calculating (or whatever) the duration properly and the end result is a
 truncated transcode.

 So let's just forget about durations -- reported, calculated or otherwise.
 This bug is really about ffmpeg truncating a transcode when it is being
 given the only VOB file that exists for a track and yet if that track is
 given to ffmpeg via `mplayer -dumpstream` it transcodes it just fine.

 I don't suppose this is going to go any further though without my
 violating a copyright and uploading a copy of the DVD.

 I seem to have gotten `mplayer -dumpstream` to work so maybe that's the
 end result of this issue.  Unfortunately.

Ticket URL: <https://trac.ffmpeg.org/ticket/8064#comment:10>
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