How long should it take to burn a dvd?

Using Nero 6, it is currently taking me about 2.5 hours to burn 1 hour of raw AVI footage. The file I am burning is about 12 gbs. I assume nero is encoding it into some compressed format and fitting it onto about 4.5 gbs on the dvd. Is this about the right amount of time or am I doing something wrong?

Sounds correct, transcoding 12 Gb to 4.5Gb would be alot of work, your CPU is probably getting real hot too, which can slow things down as well.