So i basically have a laptop (who only have a hdmi output, no input possible) and a desktop (typical one, but the hdmi port can receive input), and i thought if it was possible to somehow record on the desktop, whatever would be transmitted if i connected it to the laptop.
My first thought was ffmpeg but, while i read most of the documention, and i do feel like recording from /dev/video* would be possible, i don't think this particular could work without a real device/with just a simple hdmi cable connecting both machine right?
Tldr, want to record input from hdmi output of laptop to a hdmi input on a desktop computer, with just a simple hdmi cable connecting both.
Beside ffmpeg, i don't have much idea on how to do this. Here a rough drawing i made to illustrate it
1 Answer
If your desktop doesn't already have HDMI capture software, HDMI recorders are a thing (barring DRM, which doesn't seem to be your use-case.). Probably the most affordable ones fall in the "Game Capture Card" category. Searching for that term should produce hits for ~$70US. If DRM is an issue, it's probably a bit DIY still, but Bunnie Huang's NeTV2 could be a good starting point:
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