You MIGHT be getting the error that I was getting. If so I think it could be a bad frame in there somewhere that Tmpgenc cannot get past to encode the rest of your video. Try downloading the virtual dub frame rate checker. If you can't find it, do search in the forums for your specific error, which in this case might be something like illegal floating point, or something like that. There are many other posts already on this site about what to do about bad frames. Hope this helps...Val