Ok, heres a brief guide (using the above article) i haven't tested it so it may work xD

basically, log into your server with putty, and at the command line type:
wget http://dfn.dl.sourceforge.net/source...php-0.6.0.tbz2

Then extract it to '/usr/local/src/'
type:
tar jxvf ffmpeg-php-0.6.0.tbz2 -C /usr/local/src/

then type:
cd /usr/local/src/ffmpeg-php-0.6.0/;./configure && make && make install

Hope that works.

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mysql> SELECT * FROM `users` WHERE `users`.`clue` > 0;
Empty set (0.00 sec)