Just my quick preview evaluation and ranking - not every detail has been found or verified .... 1) Blackmagic Design Intensity Pro 4K 10 bit color precision, 4:2:2 subsampling , SD analog and HDMI input, prop-driver, "best priced" https://www.blackmagicdesign.com/no/products/intensitypro4k https://www.blackmagicdesign.com/no/products/intensitypro4k/techspecs/W-INT-... https://blog.za3k.com/capturing-video-on-debian-linux-with-the-blackmagic-in... 2) AVerMedia CL311-M2 8 bit color precision, 4:2:2 subsampling , SD analog and HDMI input, v4L2, medium priced https://www.avermedia.com/professional/product/cl311_m2/overview https://www.avermedia.com/professional/product/cl311_m2/spec https://www.avermedia.com/professional/download/cl311_m2#ans_part 3) Osprey 260e 10 bit? color precision, 4:2:2 subsampling , SD analog input only, v4L2, high priced https://www.ospreyvideo.com/analog https://docs.google.com/viewer?url=https%3A%2F%2Fdf44571b-9d7f-4226-9ca4-727... https://www.kernellabs.com/blog/?p=1801