Check whether exec() is available in FFmpeg setup

Hi There,
I have an issue with FFMPEG not being found despite having installed it.

Debug Information:

array (
  'reading_from_cache' => false,
  'ffmpeg-found' => false,
  'compiler' => 
  array (
  ),
  'binary' => 
  array (
  ),
  'ffmpeg-php-support' => false,
  'raw' => '



',
)

Whereis Result

root@webserver [~/ffmpeg-php-0.6.0]# whereis ffmpeg
ffmpeg: /usr/bin/ffmpeg /usr/local/bin/ffmpeg /usr/share/ffmpeg /usr/share/man/man1/ffmpeg.1.gz

PHP Info:

root@webserver [~/ffmpeg-php-0.6.0]# php -i | grep ffmpeg
ffmpeg
ffmpeg-php version => 0.6.0-svn
ffmpeg-php built on => Jan  3 2013 12:18:25
ffmpeg-php gd support  => enabled
ffmpeg libavcodec version => Lavc52.20.0
ffmpeg libavformat version => Lavf52.31.0
ffmpeg swscaler version => SwS0.11.0
ffmpeg.allow_persistent => 0 => 0
ffmpeg.show_warnings => 0 => 0
PWD => /root/ffmpeg-php-0.6.0

I have tried all of the paths listed in whereis

Does anyone have any suggestions as to what the issue is?