Interfacing with a BlackMagic ATEM mixer

Has anyone interface OpenLP with a BlackMagic ATEM mixer?  Our OpenLP PC feeds into an ATEM mixer together with camera feeds.  Due to covid we cannot have a live service so all our songs are via lyric videos.  What would be really helpful would be able to program up the Service so that when a video file ends, OpenLP would tell the ATEM mixer to make the switch to the next video input.  This ought to be possible in a number of ways since there is a published API for the ATEM.  Alternatively there are means to control the ATEM via MIDI controls.  Before I start looking at this, I was wondering whether anyone has done it before?




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