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Iscolating a subject from background

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Ash DavisIscolating a subject from background
by on May 5, 2010 at 6:31:13 pm

I have footage that I need to iscolate the subject form the rest of the footage, ie back and foreground. At the moment, I'm using masking and moving it each frame, this is taking far too long. Is there a quicker method to this? I tried the difference matte but doesn't really work and don't have CS5 unfortunately.. the new roto brush could be of massive use right now!


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Jeffrey KaplanRe: Iscolating a subject from background
by on May 5, 2010 at 7:04:55 pm

Welcome to the wonderful world of ROTO! Unfortunately, that is the only way to do it.

Jeff Kaplan
Point 360 WEST
Animation & VFX Department
http://www.point360west.com


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Dave LaRondeRe: Isolating a subject from background
by on May 5, 2010 at 7:11:33 pm

[Ash Davis] "At the moment, I'm using masking and moving it each frame, this is taking far too long. Is there a quicker method to this?"

I get the feeling you're quickly running out of time, and that you dearly wished you had done things differently on this project. Sorry to be the bearer of bad news, but the truthful answer to your question is, "Yes, but don't count on miracles."

Furthermore, there are no comprehensive, quickly-learned principles. Rotoscoping speed comes with experience. If you had a spare 50 bucks lying around, you could get the following DVD, and hope that it arrives in time to be useful to you:
http://store.creativecow.net/p/74/advanced_rotoscoping_techniques_for_adobe...

And if you haven't done so already, you should look at these two links:
http://help.adobe.com/en_US/AfterEffects/9.0/WS39e706a46ad531be1172e0812179...
http://aeportal.blogspot.com/2010/02/rotoscoping-tips.html


Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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