i used to hate going to weddings, all the old dears would poke me and say "your next", they stopped saying it after i did it to them at funerals -Chopper Reid-
I had the same problem as you with some avi's, then I found an amazing program called OSS Video Converter (http://www.onestopsoft.com then download a trial of Media Converter Pro). Once installed, open the OSS Video Converter program, add your AVI file, select what type of file you want and select convert! If you then want your completed file as a VCD/SVCD/DVD then open TMPGEnc select what type of format you want (VCD/SVCD/DVD) add your file then convert!
however, when trying to open with TMPGEnc it says its unsupported. Tried the advice of downloading OSSvideo converter and that did notihng at all, apart from claim it was not a video file. I have FFDShow so i don't think it could be that. I'm thinking it may be something to do with compression, is there anyway of finding out if it is compressed or not? If there is can someone tell me what the difference is between compressed and uncompressed video files and what one TMPGEnc cannot deal with? This is really starting to p*** me off! Cheers guys, great site.
Then TMPGEnc and most other VFW Programs will be able to decode the AC3 in the XviD file...
To get rid of the "Can not open or Unsupported" error in TMPGEnc then go to "options" to Enviromental Settings" to "Vfapi Plugins" and Raise the Priority of the "Direct show Multi-Media File Reader" to "2" and then the file should Load but if it doesn"t and you do have the xvid codec installed and Virtual-Dub also can not open the File then it could be that the AVI file is Corrupted which is very common with downloaded files and there isn"t much of a chance of Fixing it becides downloading it again...
your problem is a vbr with an xvid encoding you need to decompress the audio in the file
ive got a beautiful little program for it to just need to know where you want it sent
then tmpgenc will reconize the file i had the same problem and it was emailed to me glad to repay the favor for you
pay it forward