From HostThyself

Steps to install the necessary on CentOS 5.3 to get VidiScript running.

[edit] FFmpeg

Install from DAG

Setup for DAG

• download rpmforge-release
• install

rpm -i rpmforge-release-0.3.6-1.el5.rf.i386.rpm 

Install FFmpeg

yum update
yum install ffmpeg ffmpeg-devel

There could be quite a number of dependent packages

• • Doğan cihat KAYA **

[edit] FFmpeg-php

• Download from http://ffmpeg-php.sourceforge.net/
• Install php-devel and other build required packages if not available

yum install php-devel gcc make

• follow the install instructions

phpize
./configure && make
make install

• add to php.ini

vi /etc/php.ini 
(somewhere in the extension section)
extension=ffmpeg.so

• restart apache

/etc/init.d/httpd restart

[edit] MEncoder

yum install mencoder

Again lots of dependency. (Not sure why samba-common is depended though)

That should do it. Do some test to confirm.