Poor video quality in [X]Ubuntu

[el def]

[rvm]

I'm not sure, but try to select another video output in preferences -> general -> video.

[el def]

I tried to use different video outputs — there is no difference

[rvm]

Could you send the mplayer log when playing a movie? (Options -> View logs)

[el def]

Sorry, the problem was in switсhed on options `Deinterlace by default´ and `Remember settings for all files´ — when I disabled deinterlace by default, in watched videos it was still turned on. After deleting individual ini-files the problem disappeared.