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Problem when rotate masks

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osama sayegh
Problem when rotate masks
on Dec 10, 2014 at 6:18:53 pm

Hello ,
I made a circle shape , i made a thin vertical mask with no problem , put keyframe , after couple frames i rotate this mask to make it horizontal line , i previewed it , the problem appeared , while the mask was rotating , the mask became smaller and shorter until the mask became in 45 degrees , after that the mask became bigger and longer until the mask became to the original size and 100% horizontal ,
i'm sorry for my bad English
if you didn't understand me , watch this video and i think you'll understand :





How to solve this problem ? i din't want this mask to become smaller , i want it still the same size


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Dave LaRonde
Re: Problem when rotate masks
on Dec 10, 2014 at 6:57:13 pm

You aren't working in square pixels someplace in the project. Create a main comp in a square-pixel aspect ratio, probably 1920x1080 or 1280x720. Do your work entirely in square pixels.

When the time comes to render, you can next the comp containing all your work in a comp with the proper pixel aspect ratio.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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osama sayegh
Re: Problem when rotate masks
on Dec 10, 2014 at 7:09:02 pm

Excuse me , i tried to work in 1920x1920 square comp
But the problem wasn't solved
In the attached video i work in 1920x1080
This problem happen only when i rotate masks


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Dave LaRonde
Re: Problem when rotate masks
on Dec 10, 2014 at 8:07:37 pm
Last Edited By Dave LaRonde on Dec 10, 2014 at 9:36:53 pm

Then check the pixel aspect ratio of your footage. It needs to be square-pixel, too. This kind of problem ONLY occurs when something isn't in square pixels.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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