My problem arises when I try to copy the audio stream from a XViD AVI. VirtualDub tells me that: "No audio decompressor could be found to decompress the source audio format" - I know this seem very obvious, Install the right codec/decoder, dumbass! - but - I have installed almost every codec known to man, I really have ;). I tried using Gspot to see the codecs used in the file, and it lists 3 currently on my box, that can dbe used, but in Vdub it can't figure out the audio format.
Yup the audio stream is AC3, but I got the stream out with headac3he.
But then TMPGEnc tells me there is something wrong with the video stream, so it can't encode the .mpg file.