yum -y install vim git rpm rpm-devel rpm-libs rpm-build redhat-rpm-config rpmdevtools autoconf automake gcc gcc-c++ git libtool make nasm pkgconfig zlib-devel

Before we can install ffmpeg we need to set up pre-requisites. They include: yasm, libx264, libfdk_aac, libmp3lame, libopus,libogg, libvorbis, & libvpx.

Let's see how many we can find with pre-built RPM's first for anything not in the yum repository.

yasm can be found n rpmfind for the same latest version:
http://mirror.pnl.gov/epel/6/x86_64/yasm-1.2.0-1.el6.x86_64.rpm

NOTE: i386 version can be found by simply changing the x86_64 in the url to i386. To browse the rpms just go to parent directory or: http://mirror.pnl.gov/epel/6

Let's start with yasm. Source can be downloaded at: yasm.tortall.net/Download.html

ffmpeg$ mkdir -p ~/src/prereqs
ffmpeg$ cd src && mkdir tarballs compiled
ffmpeg$ cd prereqs
ffmpeg$ wget http://mirror.pnl.gov/epel/6/x86_64/yasm-1.2.0-1.el6.x86_64.rpm
ffmpeg$ sudo yum -y localinstall yasm-1.2.0-1.el6.x86_64.rpm

Now libx264

ffmpeg$ wget ftp://mirror.switch.ch/pool/4/mirror/rpmfusion/free/el/updates/6/x86_64/x264-libs-0.120-5.20120303.el6.x86_64.rpm
ffmpeg$ sudo yum -y localinstall x264-libs-0.120-5.20120303.el6.x86_64.rpm

Now libfdk_aac

The RPM is actually just named fdk_aac

ffmpeg$ wget http://yum.aclub.net/pub/linux/centos/6/umask/x86_64/fdk-aac-0.1.3-1.el6.x86_64.rpm
ffmpeg$ sudo yum localinstall fdk-aac-0.1.3-1.el6.x86_64.rpm

Now onto libmp3lame

ffmpeg$ wget ftp://ftp.univie.ac.at/systems/linux/dag/redhat/el6/en/x86_64/dag/RPMS/lame-3.99.4-1.el6.rf.x86_64.rpm
ffmpeg$ sudo yum -y localinstall lame-3.99.4-1.el6.rf.x86_64.rpm

Libopus is next...

ffmpeg$ wget ftp://ftp.univie.ac.at/systems/linux/fedora/epel/6/x86_64/opus-1.1-1.el6.x86_64.rpm
ffmpeg$ sudo yum -y localinstall opus-1.1-1.el6.x86_64.rpm

What's next?? Libogg...

libogg can actually be installed via yum... as can the last two packages libvorbis & libvpx

ffmpeg$ sudo yum -y install libogg-devel libvorbis-devel libvpx-devel

Speex was also requested for this build so

ffmpeg$ sudo yum -y install speex-devel

Now, go back to the src directory & pull ffmpeg from git.

ffmpeg$ cd ~
ffmpeg$ git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg
ffmpeg$ cd ffmpeg
ffmpeg$ ./configure --extra-libs=/usr/lib/libfdk-aac.so.0 --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libspeex --enable-libx264