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Creating alpha channel in video in order to use Auto-Trace
Ive been working for the first time with green screening. And Im interested in Auto-Trace. As Ive been looking through the web for tips, I came across this one on the Adobe Website that suggests importing video into After Effects that already has a alpha channel. But what program can you create a video with an alpha channel?
Bumdog
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3 Replies
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Oh I forgot heres the link:
https://blogs.adobe.com/genesisproject/2007/05/autotrace_in_ae_recreating_the.html -
The tutorial actually suggests bringing in your greenscreen footage, then creating an alpha channel (within After Effects). It tells you exactly how to do it.
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It even includes a nice little pic of the After Effects Output Module Settings (and highlights the “RGB + Alpha” option).
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