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Oval Mask, too oval.

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George LodygenskyOval Mask, too oval.
by on Jan 10, 2010 at 8:50:42 pm

So i know that the oval mask when Shift-keyed comes out as a perfect circle, but I don't know
why mine is just too oval:

Oval Mask

Background: i was just trying this video copilot tutorial:
(don't judge me)

and then when did the polar Coordinate plugin i noticed that was not really round but i said like "ok" all i have to do is exted the image on the Y axis:

Not right

But then when i did the mask (pressing shift) it just got really weird because that shoud look like a perfect circle.

So can any body help me figure out why is that happening?

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Michael NatkinRe: Oval Mask, too oval.
by on Jan 11, 2010 at 7:28:25 pm

I'm not completely sure I understand what you are asking, but if your point is that the "circle" in the second one isn't exactly perfect, you are correct. The circle is made with Bezier curves, which can't actually represent a perfect circle. Here is a reference:

Michael Natkin
Sr. Software Engineer
Adobe After Effects

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Dave LaRondeRe: Oval Mask, too oval.
by on Jan 11, 2010 at 9:58:59 pm

Your circle mask may indeed be circular. Since we know nothing about your comp or the footage you have in it, you may simply be seeing the comp or the layer with pixel aspect ratio compensation turned off. Learn about it here:

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

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George LodygenskyRe: Oval Mask, too oval.
by on Jan 12, 2010 at 6:15:24 pm

Thank god I posted this at the Basics section.

Thank you Mr. LaRonde, the aspect ration was turned off.

Sorry for the useless question, but thank you too Michael.

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