A mpeg movie is 5gb big?

Hey, all,

I just bought a NEC2500a. While trying to create my very first DVD movie (1 hr 30 mins long, transformed from a *.avi file), Nero kept telling me the disc is not big enough for the movie. Then I tried MyDVD. This time, I found the total size of files to be written to the disc is more than 5gb! Doesn’t it seem odd?! I am pretty sure the size of the *.mpeg is 3.5g and the DVD disc is 4,490 mb.

I am using Windows XP SP2. And the firmware version is 1.06.

Thanks a lot.