It is a known bug, (i.e. some other people know about it) but it hasn't
been reported in the bug report, (would you be willing to write one
up!). I personally would contribute to a bounty for the fix...
I've had issues with mpeg from a standalone DVD-recorder (Panasonic).
My issues were:
* Audio was always 3 seconds longer than actually in the file
* Video always had 1 frame extra
Other's who have noted the issue include:
Minmax had an issue with a certain video:
http://www.kiberpipa.org/~minmax/MOV00977.MPG
<http://www.kiberpipa.org/%7Eminmax/MOV00977.MPG>
goldfish2001 had an issue with:
www.nicholaslidster.plus.com/video/testvid.mpg
I personally fixed the first issue that I had with a patch (
http://cvs.cinelerra.org/~pmdumuid/hvirtual_mpeg_number_of_samples.diff
) but I'm not completely sure that's its safe for everyone to use. The
second issue has always evaded me. Since the MPEG specifications need
to be purchased, I personally don't understand the structure of mpeg
files, and hence how to debug libmpeg.
Here's a mail I sent out:
https://init.linpro.no/pipermail/skolelinux.no/cinelerra/2005-December/004880.html
For a discussion that occured on IRC, see:
http://cvs.cinelerra.org/irclog/index.php?file=2005-12-23.html
(specifically 13:44 onwards)
http://cvs.cinelerra.org/irclog/index.php?file=2005-12-21.html
(goldfish2001's posting)
Cheers,
Pierre
Computer Lists wrote:
Over the past week I've worked on getting all of my systems up to the
latest version of Cinelerra from cvs.cinelerra.org. I am currently
running it on the following systems:
1. A Celeron (P4 family) 2.4 GHz box with 512 Megs or RAM running
Fedora Core 3
2. A Pentium 4 (HT) 2.6 GHz box with 1 gig of RAM running Gentoo 2005.1
3. A Pentium M 1.7 GHz latop with 512 Megs or RAM running Fedora Core 3
With every MPEG (1 or 2) file that I open the video is always shorter
than the audio track. Whether it's a capture done with my PVR250
board, a video created on my Sony Mavica digital camera or a
transcoded file created with ffmpeg, the problem can be easily
reproduced. All I have to do is open the file and drag it onto the
timeline view, then magnify at the end of the tracks and the audio
always last many minutes longer than the video. Since I'm new here
I'm not sure if this is the right place to post things like this. If
not, let me know where I should post. Also, if there is a resource
that I can use to see if there is already a bug report for this issue
and it's status, please let me know. I don't want to annoy anyone,
but I want to get some answers and hopefully participate in solving
some problems. :)
Thanks,
Deck
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