Steve,
Although there were way too many choices in VirtualDlub, it worked
the first time. It's difficult to tell with these tiny images if
they were degraded by the process. The file size is much smaller
now too.
Thanks for the great help.
I converted my AVIs to 200kbps DivX and they came down to about a
third in size (550k or so). Stripping off the audio would save
another 150k or so. Another great thing about VDub is that there is
a ROTATE filter so my movies now all play the right way up.
I've not tried different bitrates but you could maybe up that a
little to 250 - 300kbps and ensure you aren't losing too much. I'm
yet to be too concerned with it