CentOS 7 - Ffmpeg

From Nux Repo

# cd
# 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 -y install ffmpeg

From Source

Follow https://trac.ffmpeg.org/wiki/CompilationGuide/Centos