rpm –import http://packages.atrpms.net/RPM-GPG-KEY.atrpms
vi /etc/yum.repos.d/atrpms.repo
[atrpms]
name=Fedora Core $releasever – $basearch – ATrpms
baseurl=http://dl.atrpms.net/el$releasever-$basearch/atrpms/stable
gpgkey=http://ATrpms.net/RPM-GPG-KEY.atrpms
gpgcheck=1
enabled=0

[atrpms-testing]
name=Fedora Core $releasever – $basearch – ATrpms
baseurl=http://dl.atrpms.net/el$releasever-$basearch/atrpms/testing
gpgkey=http://ATrpms.net/RPM-GPG-KEY.atrpms
gpgcheck=1
enabled=0`

yum --enablerepo=atrpms* install ffmpeg