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How to export a separate alpha matte video for use in iPad application
This is probably a lot easier than I’m making it but I am stuck on how to come away with a matte file that is the reverse of a file with dancing person in it. So the dancing person has an alpha channel and I want a separate video file that contains moving pixels that block the transparent areas in the dancing woman layer.
Any help would be greatly appreciated.
Will
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2 Replies
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import your dancing footage, drag it to the create a new composition button. Create a solid, put it below the footage and set it’s tracking matte to alpha inverted.
Render that out to a format that supports alpha as Dave suggested.
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[Will Heine] “I am stuck on how to come away with a matte file that is the reverse of a file with dancing person in it. So the dancing person has an alpha channel and I want a separate video file that contains moving pixels that block the transparent areas in the dancing woman layer.”
Add your item to the render queue, then click on the name of your output module to edit it. Under Video Output, change the Channels from RGB or RGB+Alpha to Alpha. An alpha-only output module will render a matte.
Walter Soyka
Principal & Designer at Keen Live
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