:: How to install ffmpeg in Linux CentOS
+ add DAG repository
vi /etc/yum.repos.d/dag.repo
# add these line:
[dag] name=DAG RPM Repository baseurl=//apt.sw.be/redhat/el$releasever/en/$basearch/dag gpgcheck=1 enabled=1
+ installing ffmpeg
yum install ffmpeg ffmpeg-devel ffmpeg-libpostproc