Cream un repozitoriu:

rpm -K rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm
 

rpm -i rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm
 

yum update
 

vi  /etc/yum.repos.d/dag.repo

Scriem acolo:

[dag]
name=DAG RPM Repository
baseurl=http://apt.sw.be/redhat/el$releasever/en/$basearch/dag
gpgcheck=1
enabled=1

 yum -y install ffmpeg ffmpeg-devel mplayer mencoder flvtool2