Don't mind me, I'm just sitting here with my HDMI-RX port on rk3588 being happy that is works and I didn't brick the board when doing uboot update to uncurse it.
rockchip something-or-other that's on the KiwiPi 5B. iirc it can strip hdcp and all that jazz, too? one of the ports is labeled "HDMI RX" for input.
AverMedia makes decent ones. I think Magewell makes "professional" ones that give you the best image quality (4:4:4), but I haven't personally used them so can't attest to their quality.
Then there are all kinds of USB cards from dubiously named manufacturers, most being some white label chip that everyone uses. Some can work decently, some have a terrible capture rate like you mentioned. Due to the nature of these sellers popping up and disappearing, I can't really make a recommendation.
Muromec · · focus · HN ↗
concerneddork · · focus · HN ↗
kotaKat · · focus · HN ↗
<a href="https://kiwipi.com/blog/rk3588-hdmi-in-test/" rel="nofollow">https://kiwipi.com/blog/rk3588-hdmi-in-test/
bityard · · focus · HN ↗
yjftsjthsd-h · · focus · HN ↗
Any decent ones? I own a few that I use for managing (semi)headless machines and they all manage maybe 2-3fps
bschwindHN · · focus · HN ↗
Then there are all kinds of USB cards from dubiously named manufacturers, most being some white label chip that everyone uses. Some can work decently, some have a terrible capture rate like you mentioned. Due to the nature of these sellers popping up and disappearing, I can't really make a recommendation.