[all variants] Convert .mp4 to .mov for Cinelerra?

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http://ubuntuforums.org – Hello, I'm trying to use cinelerra and it seems to require one to convert all video files to .mov before allowing one to edit the video. I have been looking for hours for a way to convert mp4 to mov, but there is no forthcoming solution for Linux. Is there a way to convert .mp4 files to .mov with Linux or should I just switch back to Windows or get a Mac until Linux is more mature? I like the idea of an open source operating system; but, seriously, I am spending way too much time researching how to do things with Linux that are very simple with Windows and Mac. :/ Any ideas? Thx (Hardware)