masking like after effects?

Artistic Support Compositing and Post Processing
1

Is there anywAy to mask out things in video like after effects can?

2

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/

3

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.