Install the FREE version of QuickTime. This will install a bunch of codecs on your machine, but you won't be able to export anything from qt without paying. THAT is why you then get MPEG Streamclip, which is a free solution for exporting, and it will allow you yo use all those qt codecs you just installed.
I prefer qt pro over MPEG , but when I hop on a friend's machine and he needs a couple quick exports I go this other route. But you could use this for a full production workflow as well (it allows for batch exporting, etc).
Ben Unguren
Motion Graphics & Editing
http://www.mostlydocumentary.com