setting novop=1 in mplayerplug-in.conf will add "-vop
null" to the command line. This will take precedence
over any "vop=..." in the mplayer config file.
This is especially useful for people who normally use
specific vop options, such as pp or expand/scale, who
do not want these to affect the mplayerplug-in video.
Contact me at email@example.com if need be.