Audio unexpected out of Synch due to bad Capture??

[storebror]

Hi. Did capture one of my old VHS musicvideos to an mpeg2-file using my WinTV2000 capturecard. So far so good. However,when demuxing it into a separate .m2v-file and a .wav-file(for improving the video/sound through an avisynth-script)and feeding these two files into a DVD-author program i get an Audio out of synch issue. This is totally weird since thw VHS source is a 25fps PAL and the outputted mpeg2-file is perfectly in synch all the the way for the entire 90 minutes. Why do i get this and what to do about it? Could it have something to do with the settings in my avisynthscript? Is it a bug? Why does it says when i check the mpeg2-file in the VDubMPEG2/Video/framrate:"Video:25 fps" , "Audio:24996fps"(??) All help will be appreciated
:)
Thx.

[Fugitive2]

I believe when you author with DVDLab, you can correct some
out of sync issues, by setting this in DVDLab, check this in
your authoring software, but it only helps if the out of sync
is constant.....:(

[storebror]

Thx for your reply!
How do you mean by constant? The Audio in this case, is out of synch from the start to the very end? Or getting gradually out of synch as the video progress?

[mic]

If the audio stream is off a constant amount throughout your video, then you can set the delay time to be more or less, start the audio playback sooner or later. You can sometimes do this in the authoring prog., modify the DVD files afterwards, or add silence/clip length from the start of the audio file before adding it to your DVD project. However you do it, you're just shifting the audio file one way or the other.

If the audio starts in sync, then gets out of sync, worse as the video progresses, then the audio file itself may last beyond the video: Say your video's an hour, and the audio goes for an hour and 2 minutes. IN this case you can either correct the audio file, so it plays for as long as the video, or find out what's changing the length in the first place, and don't do it, find another method or tools.

The third thing I've seen usually results from IVT, where added frames are removed to restore a 24 fps used in film. This is the worst, because individual scenes will be out of sync, and there's no uniform correction, can't just correct the entire file.