Possible , remove widescreen blackbars in windowed?

[Feclar]

Is there any way to only display the actual video of a widescreen video while you are in windowed mode?

I usually watch svcd's with bsplayer 'always on top' in a small window while doing other things on my computer, and the black bars take up valuable space.

And I dont mean pan-scan, that looses some of the picture.

I just want a widescreen picture without the black bars.