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I've got a MackBook Air running OS X 10.7.5 and a GoPro which produces .mp4 files. After having issues with QuickTime playing .mp4 files, we installed VLC. Things worked great, but all of a sudden, VLC skips and stutters when playing videos. We've tried .mp4 and .mov files.

Any idea if some file could have gotten corrupted somewhere? I've tried uninstalling and redownloading VLC.

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