dnf install --nogpgcheck https :// mirrors.rpmfusion.org/free/el/rpmfusion-free-release-9.noarch.rpm
dnf install --nogpgcheck https :// mirrors.rpmfusion.org/nonfree/el/rpmfusion-nonfree-release-9.noarch.rpm
dnf config-manager --set-enabled crb #需要启用，要不找不到ladspa
dnf install ffmpeg ffmpeg-devel
