Why do my old QT files only play audio on QT X on Lion system

I have some old NTSC (DV/DVCPRO) videos that play well on my old Leopard system but on my new Lion Macbook Pro, only the audio will play.  The video will play from within Finder but when I double click and it launches QT, QT behaves as if its only an audio file.  This is true when I try to import into Final Cut X.  Final Cut shows it as an audio file BUT 2 of the files DO show video.  These are all 720x480 video dumps.  So 7 files show as audio files and 2 work correctly.  And all work fine under Quicktime 7.7 under Leopard 10.5.8.

Please disregard this posting.  I took the old file and ran it thru compressor in a 422 format and now everything works fine and only took about 10 minutes per hour of video.  I don't know how to cancel a request and I'm really pressed for time.  Thank you.

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