Can someone give me a brief rundown on how to Rotoscope in After Effects 7

thank you in advance!

Watch this (http://forums.creativecow.net/cgi-bin/new_page_wrapper.cgi?forumid=1&page=http://www.creativecow.net/articles/oneil_bill/as_matte/index.html) and be prepared for sleepless nights.

i know this seems like a stupid question, but i only just started using after effects, how do i advance to the next frame? once ive done the first?

Press "Pg Up" or "Pg Dn".

Get Chris & Trish Meyer's books. You won't be sorry!

you'll get better quality by using the bezier mask tool, i prefer to use rotobezier, then you keyframe the mask shape, it will interpolate over time so you dont have to do every single frame

thats for matting only though, if you're trying to create some kind of waking life/scanner look, then use photoshop cs2 or illustrator, cs2 now has animation tools if you import the quicktime through imageready, THAT HOWEVER is frame by frame