Had planned some more vid clip preparation over the hols but Sat night my desktop was rebooting, there was a whine, a pop and then a burning smell... am off to Maplins today in search of a new PSU.
Meanwhile, I am having a go at plugging together my Hauppage WinTV USB2 gadget. Seems OK except that the audio is out of synch with the video. But that seems to be cured now with a switch to a different audio input.