Space required on Hard Drive for burning a DVD-R

[JuanM]

Hello:

i have burned a few DVD-R (both data and iMovies). It usually has been 
pretty straight forward. The Movies have not gone beyond 20+/- minutes.

This weekend I started a project which involves three DVDs, one that is 
about 82 minutes long, another that is about 60 minutes long and the 
last is about 45 minutes long.

I did the short one first. My first challenge was to free up enough 
space on my external firewire drives to accommodate the video in 
iMovie. The next was the space needed for the DVD file. The last 
challenge was space on the hard drive itself.

So here are the questions: how much space do you need on a hard drive 
to make a DVD? I know that as a rule of thumb, you need about 1G of 
space for each 5 minutes of iMovie length. How much time does that 
movie take when made available on the DVD using iDVD? Also, how much 
space is needed for the hard drive to handle the file?


Thanks

juan