Question

FF does not play any more videos, the message is : "no video with supported format and mimetype found"; it worked perfectly two days ago, I have tried to reinstall everythingwith no effect and it is the same for nightlies. (Debian/Wheezy FF 9.0.1) Thanks

It is not a flash or other "standard" problem seen in forums on the web. It does not appear with epiphany or chromium.

When FF opens a page with a video (any type mp4, ogv, webm) I get a black or colored rectangle and the video is not played. It seems that the mimetype is considered as unknown...

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