Problem with ac3 audio

I ripp dvd through FlaskMPEG v.05.94…for audio I chose direct stream copy … (original dvd is 5 channel AC3 audio)…than I used VirtualDubMod to merge the avi file and the AC3 audio stream…and the problem is, my result is avi file with only 2 channel stereo audio stream…how is it possible??? thanks :bow:

Here’s a useful site , http://nickyguides.digital-digest.com .

Could it be that the DVD also has 2 channel audio & that was what you selected instead of the 5.1

no…original dvd has 5.1 channel AC3 stream…and the extracted audio stream is 5.1 channel AC3 stream too…but when I merge it with avi file it is only 2 channel stereo…and I don´t know why