Yeah, I haven't burnt many videos but when it comes to encoding large video files they can take a real long time. It seems to take longer to encode them than it does to burn them. However 12 hours does seem a long time. Most of my videos usually encode at 1x speed, so a two hour concert will of course take two hours. My DVD writer will burn at 4x speed so it may take 30 mins to write to a DVD. Not sure what to suggest really. Maybe you could look for some other DVD encoding/file format conversion software.