The following article will show you how to install “step by step”  ffmpeg, ffmpeg-PHP, Mplayer, Mencoder, flv2tool, LAME MP3 Encoder, and Libog from the source. Make sure you have root shell access to your server.
cd /usr/local/src
Download the packages from its source:
wget http://rubyforge.org/frs/download.php/9225/flvtool2_1.0.5_rc6.tgz
wget http://easynews.dl.sourceforge.net/sourceforge/lame/lame-3.97.tar.gz
wget http://superb-west.dl.sourceforge.net/sourceforge/ffmpeg-php/ffmpeg-php-0.5.0.tbz2
wget http://downloads.xiph.org/releases/ogg/libogg-1.1.3.tar.gz
wget http://downloads.xiph.org/releases/vorbis/libvorbis-1.1.2.tar.gz
wget http://www4.mplayerhq.hu/MPlayer/releases/codecs/essential-20061022.tar.bz2
Extracting the packages we just downloaded:
tar zxvf lame-3.97.tar.gz
tar zxvf libogg-1.1.3.tar.gz
tar zxvf libvorbis-1.1.2.tar.gz
tar zxvf flvtool2_1.0.5_rc6.tgz
tar jxvf essential-20061022.tar.bz2
tar jxvf ffmpeg-php-0.5.0.tbz2
tar zxvf flvtool2_1.0.5_rc6.tgz

Creating a directory to store all the codecs:
mkdir /usr/local/lib/codecs/

Now we install the packages:
yum install gcc gmake make libcpp libgcc libstdc++ gcc4 gcc4-c++ gcc4-gfortran
yum install subversion ruby ncurses-devel
svn checkout svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg
svn checkout svn://svn.mplayerhq.hu/mplayer/trunk mplayer
cd /usr/local/src/mplayer
svn update
cd /usr/local/src
Lets copy the codecs for mplayer:
mv /usr/local/src/essential-20061022/* /usr/local/lib/codecs/
chmod -R 755 /usr/local/lib/codecs/
Installing Lame:
cd /usr/local/src/lame-3.97
./configure
make && make install
Installing Libogg:
cd /usr/local/src/libogg-1.1.3
./configure && make && make install
Installing libvorbis:
cd /usr/local/src/libvorbis-1.1.2
./configure && make && make install
Installing flvtool2:
cd /usr/local/src/flvtool2_1.0.5_rc6/
ruby setup.rb config
ruby setup.rb setup
ruby setup.rb install
cd /usr/local/src/mplayer
./configure && make && make install
Installing ffmpeg:
cd /usr/local/src/ffmpeg/
./configure –enable-libmp3lame –enable-libogg –enable-libvorbis –disable-mmx –enable-shared
make && make install
ln -s /usr/local/lib/libavformat.so.50 /usr/lib/libavformat.so.50
ln -s /usr/local/lib/libavcodec.so.51 /usr/lib/libavcodec.so.51
ln -s /usr/local/lib/libavutil.so.49 /usr/lib/libavutil.so.49
ln -s /usr/local/lib/libmp3lame.so.0 /usr/lib/libmp3lame.so.0
ln -s /usr/local/lib/libavformat.so.51 /usr/lib/libavformat.so.51
Installing ffmpeg-php:
cd /usr/local/src/ffmpeg-php-0.5.0/
phpize
./configure
make
make install
Finally we restart apache server:
service httpd restart