Taken from: https://markaicode.com/how-to-install-ffmpeg-on-rocky-linux-9-almalinux-9/
# dnf install epel-release # dnf config-manager --set-enabled crb # dnf install --nogpgcheck https://mirrors.rpmfusion.org/free/el/rpmfusion-free-release-$(rpm -E %rhel).noarch.rpm -y # dnf install --nogpgcheck https://mirrors.rpmfusion.org/nonfree/el/rpmfusion-nonfree-release-$(rpm -E %rhel).noarch.rpm -y # dnf install -y ffmpeg ffmpeg-devel # ffmpeg -version