The capture program for Linux is called ucview, which deploys the unicap library.

I am delighted to announce that unicap 0.2.22 has just been released.

It now ships with the following improvements:

• Better support for The Imaging Source USB 2.0 astronomy and industrial cameras
  (download the uvcvideo driver)
• Added and fixed some color conversion routines
• GTK+ apps can register their own color format conversion callback
• Some minor fixes in the unicapGTK library
• Support for recent uvcvideo drivers
• French translation (thanks to Kiki Novak!)
• Packages for Ubuntu Hardy

You can download the source code package from the unicap web site:
http://www.unicap-imaging.org/download.htm

Packages for Ubuntu 7.04 (Feisty), Ubuntu 7.10 (Gutsy) and Ubuntu 8.04 (Hardy) are in the repositories:
http://www.unicap-imaging.org/using_repositories.htm