Record or stream an HDMI signal via USB 3.1 Gen 1 with the Cam Link 4K from Elgato Systems. With its HDMI input, this capture device will accept resolutions up to 3840 x 2160 at 30p. If you need to stream or record at a lower resolution, the Cam Link 4K can also work at 1080p, 1080i, and 720p.