I've searched this problem on google and haven't found any solutions. For some reason Quicktime and FCP now refuse to recognize MPEG2 files. My camera records to a harddrive that is MPEG and I have used them for years. Now suddenly it rejects it. It opens fine in VLC but I'm trying to get back to it working the first time in FCP. QuicktimeX won't open and Quicktime7 results in this error I'm running Snow Leopard and never had a problem... what gives?!