Mpeg Streamclip from Squared5 is a fantastic little file conversion program that is the secret weapon of almost every professional editor I know. It is often more capable than leading programs such as Apple Compressor and Sorenson Squeeze, despite the fact that it is a free download! There is no excuse for anyone who works with video to be without this tool. While no conversion software on the market can handle every file type, Mpeg Streamclip does most of them and very quickly. There is a version available for Windows as well as Mac platforms, so go get it now!