Using Elgato CamLink (Gen. 1) to capture from my camcorder into OBS -- latest driver (Elgato Game Capture) and OBS version, in Windows 10 1803. I used to be able to change capture setting in OBS to 720p (using the Custom option for "Resolution/FPS Type"), but now I get a blank screen unless I set it to Device Default, which is 1080. I can downscale the output in OBS to 720p/30FPS, but would like to go back to being able to capture at 720p in the first place. Elgato Game Capture can change the resolution, but OBS now cannot. Any ideas?