CentOS7安装ffmpeg
由于CentOS自带的yum库不包含ffmpeg软件包，因此借助第三方YUM源下载ffmpeg
1.升级yum
# sudo yum install epel-release -y
# sudo yum update -y
2.安装Nux Dextop Yum 源
# sudo rpm --import http://li.nux.ro/download/nux/RPM-GPG-KEY-nux.ro
# sudo 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 和 FFmpeg开发包
# sudo yum install ffmpeg ffmpeg-devel -y
4.测试
# ffmpeg
