ubuntu linux screen casting / screen recording

sudo apt-get install xvidcap
> screencast recorders
sudo apt-get install istanbul
sudo apt-get install gtk-recordmydesktop
  http://ubuntuforums.org/showthread.php?t=294605
> encoders
sudo apt-get install ffmpeg
sudo apt-get install mencoder
> editors
sudo apt-get install audacity
sudo apt-get install avidemux
sudo apt-get install blender
> converters
sudo apt-get install h264enc
sudo apt-get install xvidenc
sudo apt-get install divxenc