mplayer video screen is disappearing

When I am trying to open any video file [ .mp4, .mkv, .flv so far ] with mplayer from right click context menu on Nautilus, the following things are happening:

• audio is playing but video playing screen is just disappearing.
• the control box is still there and able to pause, stop etc from it.
• sometimes after pausing/stopping the file, video screen is appearing and mplayer is freezing. To stop it I had to kill it.

If I run those same videos with mplayer from a terminal everything is fine without any issue. Only the control box is not there (I think this is default, I don't have an issue with it).