Wanting to know if VideoIO supports Alpha channels

General Usage
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Like the title says, I am trying to find out if VideoIO can handle dealing with pixel data that uses the alpha channel.

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It does not, the list of supported pixel formats for video writing is here. I don’t think many codecs support an alpha channel, maybe VP9? I would try to get a pipeline going with the ffmpeg cli and then write to that on stdin. FFMPEG_jll makes it simple to find and install a copy of FFMPEG for your program to use.

Edit:
An interesting post about Alpha with FFMPEG:

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