Is there anywAy to mask out things in video like after effects can?
rotobezier addon(comes with blender but its not enabled by default)
tutorial here: http://cgcookie.com/blender/2010/12/01/tip-addon-rotobezier/
a more in depth one here: http://goodspiritgraphics.com/software/tutorials/blender-tutorials/blendertut1/
There’s the ultimate tutorial on rotoscoping/masking in Blender.
Sometime this year, it will get alot easier, though. One of Project Mango’s main focuses is on rotoscoping.