Source Selene @ Launchpad.
Selene is an audio/video converter for linux that uses bash scripts for transcoding the input files. The scripts can use any command line utility for encoding the input and Selene will display the progress along with options to pause/resume/shutdown, etc.
Since the conversion process is driven by bash scripts, this makes Selene extremely flexible. Bash scripts can be written for a wide variety of transcoding tasks.
To install Selene just run the following commands via your systems Terminal.
sudo apt-add-repository ppa:teejee2008/ppa
sudo apt-get update
sudo apt-get install selene
That's It Enjoy.