No I haven't. Just an update, this coming week I will have the time to work out how to get my script to encode without running out of memory. The major problem is that there are too many different clips that get loaded all into one Avisynth file, therefore I'm pretty sure the problem will be solved by delineating the iterations into separate files - there are a couple of issues though, for one the DVD-upscale part of the script was never intended to be done in this way, so I need to rewrite it so that it only returns the required frames and then rewrite the other part of the script so instead of seeking out the required frames it trims from the returned file.