[MPlayer-users] how can I force mplayer to hold the aspect of the playing file?

[frizop at charter.net]

	I've tried a few of the commands but couldn't seem to force it to hold 
its aspect when I use the mouse to resize the *avi* file. I read 
somewhere that mplayer might only do this for mpegs?

Anyway, thanks in advance for the help
--Nathan