MarsSeed [1] filed a deletion request for v4l-utils-rockchip [2]: Not actively maintained, outdated package from 2020, variant of extra/v4l-utils.
Also, this is only useful on ARM architecture, so if still relevant, an updated PKGBUILD should be submitted to ArchLinuxARM.org: https://archlinuxarm.org/forum/viewforum.php?f=4 [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/v4l-utils-rockchip/
