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Yeah, this script will also heat your home :)

Especially, if you use the Zoom desktop client. Zoom on web (Firefox) seems to be easier on the CPU for some reason though.

Any chance this could be integrated with OBS? To select filters, show previews, etc.

Going forward, I wonder if OBS will offer pipewire or gstreamer streams (if those are a thing) for consumption by other apps?

There is an OBS plugin that allows you to use gstreamer nodes as filters: https://github.com/fzwoch/obs-gstreamer