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How to mask a slice of a movie and rotate the mask, but not the movie?
I have a movie that I add a mask so that only a slice of the movie is visible over transparent background. While the movie is stionary I need to rotate that mask (a slice) around the center one full turn.
Somehow I am not able to do this simple task.
I have tried so far to add a Adjustment layer and parent my movie layer to it. Then add mask to Adjustment layer. This way nothing gets masked.
The same with Null Object.
I can not get a mask filled with movie to move independent if I apply the mask directly to movie layer. -
2 Replies
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If I’m not mistaken, i think that
Step1: Duplicate your layer
Step2: Create mask on upper layer
Step3: TrkMat(lower layer) choose Alpha Matte …
Step4: Rotate upper layer -
More info on track mattes is available here.
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