One of the common questions we get here at linuxjournal.com is how we produce our videos. Shawn produced a howto video on some ways of doing it. The following describes how I capture my videos and also the script that I use to add the Linux Journal logo watermark to it.
The video capture howto part of the article is fairly simple: I use xvidcap:
$ xvidcap –cap_geometry 640×480
The –cap_geometry argument sets the initial size of the capture area so that I always get the same size video. This is also a requirement for my watermark adding script.