Will track it there as well, thanks for sharing. Wish the build process paid attention to this sort of thing and didn’t generate a bad snapshot when detecting missing dependencies. A lot of software is broken so I hope it will be fixed in a few hours at most.
Found a workaround for the moment.
https://pkgs.org/download/libx264
Download x264 from Arch Staging then install it with sudo pacman -Ud "/home/user/Downloads/x264-3 0.164.r3081.19856cc-1-x86_64.pkg.tar.zst": This seems fix the broken dependency until it’s resolved in the repository too, at which point I’d do a force reinstall of this package just in case it differs or conflicts with this temporary change.