A client needed FFMPEG installed on a Centos Server for use with SlideShow Pro Director. Here is a quick method using Yum rather than compiling the source code, assuming you have root privileges: Add a new repository for Yum

vim /etc/yum.repos.d/dag.repo

and add the following repo details to it

name=Dag RPM Repository for Red Hat Enterprise Linux 
baseurl=http://apt.sw.be/redhat/el$releasever/en/$basearch/dag gpgcheck=1 enabled=1

Then install FFMpeg

yum install ffmpeg ffmpeg-devel

I then got an error about not having a public key installed. So we need to import the public key for the Dag RPM repo which is available here: http://dag.wieers.com/rpm/packages/RPM-GPG-KEY.dag.txt

rpm --import http://dag.wieers.com/rpm/packages/RPM-GPG-KEY.dag.txt

Thanks to http://www.mysql-apache-php.com/ffmpeg-install.htm for the kick-start on this.</p>