Audio paroblems with Virtualdub

[Nixdorf_]

Hi! When a try to load in av avi. movie into Virtualdub I get this:
"Vitualdub has detected an improperVBR audio encodingin the source AVI file an will rewrite the audio header with standard CBR values during processing for better compatibility. This may introduce up to 25195*ms of skew from the vidoe stream. If this is unacceptable, decompress the *entire* audio stream to an uncompressed WAV file and recompress with a constant bitrate encoder"

25195 is different depending on different movies.

Where do I go from here to fix this properly?

Thank you for any help!

[Hardcoreruss]

Basically that means that audio is going to be out of sync with your video once it is encoded.

Extract the audio to an uncompressed wav file and then re-encode the file with a piece of software like tmpgenc.

Use your original file for the source of the video and the file you have just created with the prefix .wav as the source for the audio.

For more detailed methods on how to do this perform a forum search.

[mats.hogberg]

I'd even go one step further: I'd extract the audio track from the AVI using VirtualDub in its original format (mp3, AC3...) using Direct Stream Copy under the Audio menu, and Save wav from the File menu. You'll be left with the audio track with a .wav extension even if it almost certainly is no wav. Change the extension to the correct one (.mp3/.ac3/...) Then I'd use the best and most accurate mp3/AC3/...-to-wav converter I know/have, and decode it to wav.
My reason for this is that since VirtualDub complains about the audio in the first place (and tells you it's more than it can handle), how can I confidently allow it to convert it to wav? Maybe it can, but I wouldn't bet on it...
Another popular method is to simply open tha AVI in the audio editor GoldWave, and then just save wav!

/Mats