Hi
15 minutes seems a bit long and I think this may be a PC speed problem.
I can't check rendering time for a 15 second IMAGE clip as VP 3.xx has a fault.- It can't render a single image or the last image on the timeline as I have noted elsewhere!
However, a 15 second 1280 x 720 MPEG4 video clip was saved as a HD 720 avi in 2 minutes on a dual core Packard Bell computer running at 2.2 Ghz and 2 Gb of RAM
The versions 3.xx save more data than 2.41 for the same sequence so if upgrading is out then I might think of going back to 2.41 if rendering time is important. I can hear my PC speeding up dramatically with these versions and they still run slow.
Nat