Just thought I'd add to this because it's an issue that's been bothering me for some time. Does anyone know of a good guide to codecs in general? I know how to install (not always properly though) some of them but all in all I have no idea what's happening with my video codecs and how to identify problems when they happen etc. Think it might be helpful to Bansaw and other amateurs like me who experience such headaches over codecs.