I have a MS2109 USB Grabber, and a FeinTech VSP01202 4K Splitter. The manual of the splitter says downscale to 1080p60 is supported, which I confirmed with my second monitor. But when I connect my USB Grabber to the Splitter output, and observe the Live View, the grabbed image is displayed only for a few seconds, after which it turns black. I tried changing every setting I could find and nothing works.
Without the splitter however, I get a proper image with the grabber, so individually everything works, but the Splitter and Grabber together seem to have some sort of compatibility issues. I would really appreciate if somebody can help me out with this.