MarsSeed [1] filed a deletion request for v4l-utils-rockchip [2]: Abandoned since 2020. And not actually compatible with Arch Linux x86_64, only with ARM 32/64-bit.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/v4l-utils-rockchip/
