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Masking Layer With Moving Object In The Background

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Charles Taylor
Masking Layer With Moving Object In The Background
on Apr 26, 2011 at 1:42:12 am

I recently recorded a training session for work. It involved a presenter talking, usually at a podium, and a powerpoint presentation in the background. I was asked to make a training video for the company. I used a basic HD Handycam to tape the session so the powerpoint is not readable. I converted the slides to jpeg's and and positioned them over the video in Premier Pro. My problem is when someone walks in front of the powerpoint the added layer obviously cuts their head off. For the most part the presenter is not in front of the screen. How would I edit the layer to prevent this from happening? I imported the Premier Pro project into After Affects but that is as far as my knowledge will take me. I've attached a picture to help describe my problem.

Thanks in advance for any help!



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Tudor "Ted" Jelescu
Re: Masking Layer With Moving Object In The Background
on Apr 26, 2011 at 7:07:33 am

You may get away with a difference matte:
http://livedocs.adobe.com/en_US/AfterEffects/8.0/help.html?content=WS387852...

Tudor "Ted" Jelescu
Senior VFX Artist


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Dave LaRonde
Re: Masking Layer With Moving Object In The Background
on Apr 26, 2011 at 4:21:08 pm

If Ted's suggestion doesn't work, you'll probably have to resort to rotoscoping or diving into AE's new Rotobrush. It won't be fun nor fast nor intuitive.

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


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Michael Szalapski
Re: Masking Layer With Moving Object In The Background
on Apr 27, 2011 at 1:51:21 pm

This page [link] has some good rotoscoping resources.

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.


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