Conflict between Logitech 920 and USB Video source

photon

New Member
Hi,
I can get either the Logitech 920 or USB Video working, but not in the same session.
The USB Video is running through a working cam link (USB Video Capture Card, HD Video Capture HDMI to USB for Live Stream) with either a GoPro Hero4 Black or Nikon D300 as the camera.
If I launch with either the Logitech or USB Video selected from the previous session, that video works fine, but the other is somehow disabled.

Deactivate/Activate on both or either has no effect
Checking the Deactivate box on both or either has no effect.

I'm not using either as an Audio source, if that matters.

I can also use the Logitech 920 and a Droidcam phone camera ok, and switch between them fully.
It's only when using the USB Video source that there is a conflict disabling one or the other camera.

Any suggestions welcome. Thanks.

WIndows 10, dual Xeon CPU's, mucho RAM.
 
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