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I have installed ubuntu-restricted-extras but when I play a movie such as this http://media.railscasts.com/videos/250_authentication_from_scratch.mov it plays the sound but the video is just a black screen.

It does the same in several different media players VLC, Totem, Bansheee. The BBC Iplayer and Youtube work fine.

How do I troubleshoot this?

Thanks

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up vote 1 down vote accepted

I managed to fix this by removing some third party software sources! Yay

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Any specific sources causing problems? – Michael Curran Feb 3 '11 at 20:52
    
Unity 2-D I think – wildster Feb 3 '11 at 21:04

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