Size vs Constant vs Variable Bitrate

I was just wondering something?
I remember some time back the question about weather
DVD2One re-compreses the movie if it is small enough to
fit on a dvd disc. Answer was it leaves the video as is if it will
fit. i have a movie that all files totaled = 4.1 gig.
Using movie only option, and Variable bitrate, time to process was
6 minutes. If i use Constant bitrate on the move with all other
options the same. total time is 11 minutes. Why such a time
difference? Just wondering.


One word : Pre-scanning :slight_smile: