Audio Sync Out on AVI

[Thargun]

Hello All,
I have downloaded some '.avi' files and when I watch them on PC the are perfect and audio is bang on, but as soon as I try and encode them to 'MPeg2' or watch them through VirtualDub the sync goes out. I have read some of the guides in DVDRHelp and have tried stretching the audio with Goldwave to the correct length and adjusted the skew with VirtualDub after, but to no avail. I encode using Canopus, but I have tried TMPGEnc but neither can give me perfect sync.

Programs Used:-
Canopus
TMPGEnc
Virtual Dub
Gold Wave
GSpot

I have split the '.avi' to separate AUDIO and VIDEO files and tried to merge them. I am slowly running out of ideas, please someone, give me guidance.

Below is the Error when putting the '.avi' into Virtual Dub

[Thargun]

Error message

VirtualDun has detected and improper VBR audio encoding in the source AVI file and will rewruite the audio header with standard CBR values during processing for better compatibility. This may introduce up to 5864 ms of skew from the video stream. If this is unacceptable, decompress the *entire* audio stream to uncompressed WAV file and recompress with a constant bitrate encode. (bitrate: 133.4 ± 18.7 kbps)

Bare in mind that it plays perfect on WMP

[ZippyP.]

Extract the audio from the avi to wav using Goldwave, just load the avi then save. Use the wav as the audio source for TMPGEnc.