Nice, I had thought about an HDMI capture device but plugged it in, played with it for about 5 minutes trying to tune out the latency(I'm not exactly and ffmpeg pro) and didn't make much head way. I was also using either a pi 2 or 3, so that maybe have been part of the problem too. I'm glad someone actually had the time to see it through and put together a solution. Having one of these would have been super useful the past few days when I was having kernel panics due to a failing root disk on my home server, but I had any spare monitors stored away because I'm in the middle of moving. I'll have to give this a look once I get all settled in again.