按照这个文本的要求安装，一条条执行确保每一个包都安装成功 -- 通常客户运行异常就是这个原因
仅支持系统是 Centos7.* 

yum install -y epel-release
yum repolist
yum install gflags
yum install libtool
yum install leveldb-devel
yum install lmdb-devel
yum install gtk3-devel
yum install libgstreamer*
yum install gstreamer*
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
yum repolist
rpm --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-0-1.el7.nux.noarch.rpm
yum install -y ffmpeg
yum install ffmpeg-devel