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:
You can download the source code package from the unicap web site:
Packages for Ubuntu 7.04 (Feisty), Ubuntu 7.10 (Gutsy) and Ubuntu 8.04 (Hardy) are in the repositories: