Audio/video sync in DivX using GKNOT 0.35

[marz28]

I have to convert 200 DVD's to Divx files.

These's DVD are created by a sort of camera device, which writes to DVD's directly.
During the video's the filming is stopped and than continued again.
This creates chapters on the DVD's
I THINK this is causing the synchronisation errors.
When I rip the DVD's to a .mpg file, the audio/video is sync.
When I convert to DivX, the sync problems are there.

When ripping I check the lenght of the AVI (video only) file and the AC3 file that's created.
These DO NOT match. So, no wonder the audio and video are out of sync.

Tried to fix it using Virtdub.
Video framerate control, setting duration to match. this helps a bit. The length is now the same, but stil out of sync.
I can use audiointerleaving options to get it right at start. But the audio is gradually getting out of sync. I think due to the chapters issue.

Anybody knows how i can sync in a quick way and easy way? :thanks:

[marz28]

Well?? Anybody?

[CWR03]

This is more of a guess, but perhaps you could rip the files as chapters, for example when you rip a DVD to your drive with DVD Decrypter you have checkboxes for each chapter. You could uncheck all but one, then rip, then uncheck that one and check the next, etc. Afterwards try DGIndex to open several as one .d2v file and encode.

If this doesn't help, using DGIndex individually extract the audio to a .wav file and edit in or out what each needs to stay in synch. I'm sure with a lot of projects it will be time consuming, but it should work.

You miight even try an older program called Vidomi - I have an occasional problem with my video card where it "hiccups" and the audio is thrown badly out of synch, but if I edit around it just right it's hardly noticeable and it stays synched, plus it's an extremely easy-to-use editor. Unfortunately it won't work with newer XviD codecs, but it does a really nice job with the older one it uses.

[thecrock]

There are guides on this site for audio getting gradually more out of sync.
Try a search for fixing audio.

[CWR03]

I was hoping he'd confirm that the problem was caused by the chapter breaks - if it's gradually drifting off that's one thing, but if each chapter break knocks it off a bit farther it would be an entirely different problem.

[marz28]

I'm now trying to see what chapter Xtractor can do for me.
If this doesn't work, i'll try to rip the chapters seperatly and encode them as avi's.
I'll post my findings asap.