There are currently 5 active ffmpeg release versions 0.7.x up to 0.11.x. This document describes how to install these versions. I’ll leave you with a system ready for you to pick a version you need/want and tell you how to install them. All versions are as complete as possible AND containing nearly all supported codecs.
Tag: 0.7

Installing ffmpeg 0.7 on debian squeeze
I’ve created a newer version of this how-to which covers all current active releases of ffmpeg . The new how-to can be found here.