I'm not quite sure what Smart Rendering is & when I could/should use it as opposed to using the more complicated settings.
I did try using it once, but the movie became stuck at a certain point! I have more or less got the hang of the complicated settings, by adusting the Mbits in relation to the length/size(gb) of the footage, to get it as close as possible to the 4.7gb to maximize quality, but Smart Rendering is a mystery & would be grateful for some info on it - many thanks