1：先安装epel-release
yum install epel-release
2：安装nux存储库
rpm -v –import http://li.nux.ro/download/nux/RPM-GPG-KEY-nux.ro
rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm
3：安装ffmpeg
yum install ffmpeg ffmpeg-devel
4：测试下
ffmpeg -version