Opacity mask distorts and shift after mask path created

New Here ,
Feb 25, 2022 Feb 25, 2022

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I have a video clip of falling leaves, in which I'm trying to isolate a single leaf for use elsewhere. I'm doing this by creating an opcacity mask, outlining a path for that single leaf. Because it changes shape as it falls, I have manually adjusted the mask frame by frame. When I go back, the frames are distorted and incorrect, not outlining the leaf. I have now done this twice. What am I doing to cause this to distort over and over??

 

Examples of the problem:

Marilana23341108zui0_0-1645847102018.png

Marilana23341108zui0_1-1645847121102.png

Marilana23341108zui0_2-1645847141817.png

Marilana23341108zui0_3-1645847237362.png

 

 

 

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Adobe Community Professional ,
Feb 26, 2022 Feb 26, 2022

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If you have it this would be better done in After Effects using rotoscope

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New Here ,
Feb 26, 2022 Feb 26, 2022

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Ok- I'll look into that, but I also already did this in adobe premiere pro, and the post is regarding unexpected, bug-like behavior. Not about a better way to do it.

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Adobe Community Professional ,
Feb 26, 2022 Feb 26, 2022

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I agree with Richard. Best done in Ae.

During entire masking use the same amount of nodes. Do not add or delete.

Maybe key out the background and export with alpha channel.

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