Control opacity of one clip using luma of another clip

New Here ,
May 01, 2021 May 01, 2021

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I wish to control the opacity of one clip using the luma of another clip. So for example, completely white parts in clip 1 should result in opacity 100 %  in clip 2, grey parts in clip 1 should result in opacity 50 % in clip 2, and black parts in clip 1 should result in opacity 0 % in clip 2  Is this possible?

 

Experimenting with Track Matte Key has not given satisfactory results. The issue is that the clip I intend to use only for controlling opacity is visible (i.e., the non-black parts show up in the final video). What I desire is that the clip that controls opacity is not visible in any way, it should only control the opacity of that other clip.

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Editing, Effects and Titles

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Adobe Community Professional ,
May 01, 2021 May 01, 2021

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