fading from one frame to the next

Hey, I have what I hope is a simple problem. I'm trying to make the frames of a quicktime movie fade or blend into each other when I set its rate attribute to a low value (eg. 0.2). I'm hoping there is another solution besides some switching back and forth with the xfade object or something of that nature. I've tried using the gem library's blur, but I think it is really meant for use with 3d models.

Just a simple transition so it doesn't look like my computer can't keep up is all I need! Thanks!