Problems with VirtualDub

[datasorber]

Not quite sure what video format my file is but here are properties:

Audio: Sample Rate:48kHz, Channels: 5
Video: Frame Rate: 25fps, Video Compresion: DivX Codec
Windows explorer calls file simply a 'video clip'

I'm trying to extract audio as .WAV for TMPGEnc but I
get following error messages:

'ACM failed to suggest audio decompression format'
'AVIOutputWAV: The handle is invalid'

I've tried Virtualdub 1.3 & 1.5.1 without success.

I'd really be grateful if you could help me out here.

Thanks

[fingernailX]

5 channels is probably AC3. You need virtualdubmod. see http://virtualdubmod.sourceforge.net/