I teach Calculus at a local college and we just got SmartBoards! So, I've spent all year using Smart Notebook in WINDOZE to deliver my lessons and record them with Smart Recorder (plus voice over via wireless mic).

The problem with this scenario, asside from being forced to use WIMxP by the tech guy at my school, is that Smart Recorder outputs only WMV video files and they take forever to render. If I record 30 minutes of a class, it could take about 10 minutes to render a 20MB file after the class is over! Also, I teach Computer Science with Linux and I'd like to do all this SmartBoard stuff in Linux next year to record all my classes.

So, I'm trying to figure out 2 things:
(1) How do I use ffmpeg to do a live video screen capture of my desktop in real time with my voice and
(2) how do I get my Smart Airliner Tablet, which is a bluetooth device, to work with KNOPPIX.

Let's focus on #1 for now. I have the KNOPPIX DVD hd installed on all the PCs in my classroom/lab (25 PCs - 1 for me and 24 for my students). So, I thought I'd try on my PC:

Code:
ffmpeg -f x11grab -r 25 -s 800x600 -i 0.0 test.mpg
This way I could give my students mpegs instead of wmvs and I can record in Linux! However, I get an error that "x11grab" is not recognized. I got this syntax from the ffmpeg man page, so what gives?

Anyone who has experience with this or who can recommend a better way to do this, please help!

TIA,
AJG