screenshot of mplayer-movie?

[Matthias Leopold <bedhead@gmx.net>]

hi

although this isn't debian-specific, i hope someone can help me (i AM using debian). 
how can i make screenshots of playing videos(maybe fullscreen)? i've tried to do this 
using the import program from ImageMagick, but it obviously doesn't work. somewhere i 
read that i should disable the xvideo extension to make screenshots of movies, but i 
don't know how to do this. im using the commercial nvidia driver and the mplayer debs 
from http://marillat.free.fr/ on a (mostly) testing system. everything works fine, 
except i can't make screenshots to brag with...

thanks
matthias