[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 |
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Comment (by brianjmurrell):
Replying to [comment:9 mkver]:
> 1. Who says that VLC not simply uses another file without ever telling
you?
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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