logging out leaving a command running

[Byron Poland]

I'm on the road for work.  I have a mythtv box set up at home
recording HD content.  I can ssh into my network, and execute a script
on my ubuntu workstation that transcodes shows I chose.  I have to
stay logged in for the script to continue.

 I want to beable to log in real quick start the command log out with
the confidence that the script will continue.
Any suggestions?