Still getting black screen

[markireland]

When I setup Game Capture for Oxygen Not included on Steam I see the game in the setup preview but still get a black screen after I accept the settings

 

[FerretBomb]

Right-click the capture source in the Sources list, go to Transforms, then Reset Transform. Then do the same again, and instead Fit To Screen.
Sometimes sources can be created far outside the canvas area and are not visible. The above should fix that, if it happened in this case.