When attached to a USB port the Magewell device shows up under /dev/video* on Linux. On Linux, no additional driver is needed. But it certainly doesn’t sit there wasting power getting hot anymore. ![]() Perhaps this prolongs the device lifetime, I don’t know. I simply turn the port off when the capture card isn’t in use. Given I don’t use it all the time, I attached it to the PC via a USB 3.0 Hub (affiliate link) with individual switches for each port. It can get a little warm while powered up. I have the Magewell device permanently connected to my PC. ![]() Connect one end of the supplied USB cable to the device, and the other end to machine doing the capturing. Attach the output of the machine you want to capture to the HDMI port. One end has an HDMI socket, the other has a USB 3.0 Type-A socket. If you’re looking for a cheaper alternative (which weren’t around when I bought the above device) check out How to Tweak a £10 HDMI to USB Capture Device by Les Pounder. I prefer these hardware solutions over the software screencasting counterparts, as they tend to be more reliable, and don’t consume resources on the computer being recorded. I use it to capture the output of computers, mostly to get pixel perfect bug reports, and to make some videos for YouTube. It’s a neat, reliable and well made, if expensive device. Three years ago I bought a Magewell USB HDMI capture device (affiliate link).
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