Image mask

I am working on a custom sized video in FCPX. File size is 8150 x 1200. Everything seems to go on but image mask, when i load a same size png mask is appears stretched. I test it on a standard video size 4K and it works fine. Is image mask not working with custom files?
I often work on those kind of products and i should fix the problem
thank you for your help.
Aldo

I tried using the file you posted as an image mask on a 8150x1200 project and I got similar results as you did.
Although the image used as a mask is the same size as the project, it got stretched horizontally, producing "fat" people.
However, placing the same image on the timeline as a regular clip does not stretch it.
This suggests a workaround, that in my limited testing seems to work. (emphasis on workaround, since I believe it should not be necessary).
Connect your would-be-mask above the clip, and change its blend mode to stencil alpha.

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JohnHutchinson wrote:
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Attachments:
first.jpg ‏81 KB
second.jpg ‏68 KB

Which pdf has an image mask?

Hi guys,
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Hi,
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Something you mentioned about Z plane was spot on.
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No worries. Thank you so much for your reply. I thought I was going MAD!!! ( I slowly was!!! )
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<------------------------------ From Adobe Premiere Elements 10 PDF Manual - Follow these steps to the letter. Play your clip back... watch it fail on Win 7 x64 ---------------------------------------->
Create special transitions
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Check out the sequence settings of the FCP sequence you're exporting from.
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Les

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