DVD to AVI convertion problems
 

I have a Sumvision KPac 2.2" 2GB MP4 player.
I have tried various ways of converting DVD (non copy protection) to AVI for playing on my MP4 player.
No matter what I try the audio is always out of sync.
It is ok at the start but the longer the video is the more the sync drifts.
Is there a procedure that I can follow?
I have the following software
DVD Shrink 3.2
DVDFabPlatinum
VDub
Xilisoft Converter 3.1
AVConverter1.0 (came with the device)
I do not have any sample video to upload to get settings from.