Ok ... I'm fairly new to converting .avi files to Mpeg, ready for DVD authoring. I've read many guides and have got to this point .. I'm using VirtualDub and extracting the audio into a WAV file. Then using TMGPEnc to encode the video, using the .avi file as the source and the .WAV file as the audio. All looks fine and the encoding appears to go well. But, after i author the 2 files (m2v and wav) files after they're encoded, i get really bad audio sync! Please please help as i've tried everything in my (limited) knowledge ! The only error i get is this in VirtualDub .. 'VirtualDub has detected an improper VBR audio encoding in the source AVI file (audio stream 1). The current preference is to rewrite the audio header with standard CBR values during processing for better compatibility. This may introduce up to 24225ms of skew from the video stream. If this is unacceptable, decompress the *entire* audio strem to an uncompressed WAV file and recompress with a constant bitrate encoder. (bitrate: 125.3 +- 13.7 kbps) Do you still want to rewrite the header ? ' It doesn't seem to make any difference if i select Yes or No here ??