Awww.
Well, Prism is a good converter for PC; get the free trial. It's funny, when the trial expires just uninstall and reinstall, it can't detect. xD
For Mac, iSquint is good (but it's out of circulation; there are tons of torrents out there for it, ironic, xD). There's also MPEG Streamclip.
SugarSpiral, that's fine.
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My name is Fuzzle-san. I like making things go kaboom.