1.Install additional software sources EPEL and nux-dextop
rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-1.el7.nux.noarch.rpm
rpm -Uvh http://ftp.sjtu.edu.cn/fedora/epel//RPM-GPG-KEY-EPEL-72.Install required files
yum -y --enablerepo=nux-dextop install gstreamer-ffmpeg vlc gstreamer-plugins-ugly gstreamer-plugins-bad gstreamer-plugins-ugly ffmpeg libvdpau mpg123 mplayer mplayer-gui gstreamer-plugins-bad-nonfree gstreamer1-libav gstreamer1-plugins-bad-freeworld gstreamer1-plugins-ugly
ps：Some of them may be installed when the system is installed, and the installation process will be automatically ignored.nux-dextopIt is invalid, so add it.--enablerepo