http:/ / avicodec.duby.info/
Select the troublesome video file and you'll instantly be presented with all pertinent information about the codec(s). If you lack the codec, just click on the Web button next to the file type, video codec type, or audio codec type, and AVIcodec will pull up a page from which you can locate and download the necessary files. As an added bonus, AVIcodec will give you a list of all currently installed codecs on your system.
