motrucker wrote:
Surely anything that old and slow has LONG been put out to pasture.......... 
In the other room I have a K6-3 400 with a bt848 PCI card that I use to record TV. At 320x240 and 30fps, compressing with xvid in realtime the cpu is maxed out though.
Some devices (probably most external ones) have hardware MPEG or MJPEG encoders so you don't need as much CPU speed.