Elektrobix - MANY thanks, I copied the Sony AVC settings you posted exactly and got fantastic high quality results (6 minute file at 225MB) - hopefully some other people can benefit from this too. I rendered a further Sony AVC file out at the 4,000,000 bitrate setting too, and got identical brilliant results at 178MB - matching the target 30MB or less (per minute of video) that I wanted with almost full video quality. I really appreciate the help there, and think the main setting I didn't have was that I had the profile set to "baseline" rather than "main"?
One thing was though, in the Main Concept dropdown option, I was getting the "custom" box greyed out for some reason - meaning that I couldn't go in to follow your second process, which I would also very much like to try to compare at the very least. Am I perhaps missing a codec in my setup, or anyone any other ideas? Anyway, thanks buddy
Adam