Have you tried playing the files on your HD with VLC and MPlayer? If they're not still encrypted, I think they ought to play. (And if VLC doesn't work, you can try one of the prerelease
nightly builds.)
If you can play it in VLC, you should be able to convert it with VLC. If you can play it in MPlayer, you should be able to convert it with the command-like mencoder or with ffmpegX.