Drifting audio sync

[Daagar]

A common problem seems to be that when converting an AVI to VCD/SVCD, it is possible to get a 'drifiting audio' effect, where things are in sync near the start of the movie, but it drifts out of sync (up to 1/2second) after about an hour. Has anyone ever found a _good_ solution for this?

Typical scenario:
1. Extract the audio from the avi to an uncompressed .wav (using VirtualDub).

2. Encode the avi and the separate .wav in TMPGEnc.

I've also tried remux in the audio afterwards, but it still exhibits the same problem. Any ideas greatly welcome... 'typical' fixes that involves offsetting the audio don't work, because it is a drift, not a linear offset of a/v. Correcting the end of the movie to be in sync causes the beginning to be out of sync. Quite annoying!

[smiller667]

Try this guide: http://forum.vcdhelp.com/userguides/78944.php ... a freeware alternative for the wav stretching/compression task is WLA (wavelength adjust) from doom9's main software download page.

[Daagar]

Thanks, a bit tedious, but should do the job. The comments on that guide also gave some alternative ways of fixing it up _before_ the encoding step which I need to try as well. (Syncing the audio and video lengths in VDub, doing a direct stream copy, then encoding).

It appears that the correct combo of these alternatives work. I've posted another thread with the solution.