How to compress a video to fit in iDvd?

Question

I am brand new to iMovie/iDVD but think I'm going to love them. However, I have a newbie question about "shrinking" a movie to fit.
Originally I created a movie in iMovie. No chapters, just two short transitions. Exported it as "Large" to Media Browswer (it is meant for TV).  When I open iDVD, I want to forgo the menu, so I simply dropped my iMovie file onto the first blank box in the "DVD Map" section and set it to loop. (A yellow triangle appears on the excluded Menu that says "Menu Contains No Buttons," but I think that may be unrelated to my issue).
When I look at Project > Info, I see that my file is 135 minutes and 4.30 GB -- just over the limit of a traditional DVD-R.  Encoding is set to "high quality." When I try to burn, it simply tells me that there is not enough space and I must remove some content for it to fit.
Is there no way that iDVD can "shrink" it with some quality loss like other programs? If not, how would I go about burning this to a DVD (either through iDVD or another program?)

Answer 1

Hi
A single-layer DVD will accept 90 minutes of video
No - in Pro Quality - max is 120 minutes.
• Professional Quality
(movies + menus up to 120 min.) - BEST (but not always for short movies e.g. up to 45 minutes in total)
• Best Performances
(movies + menus less than 60 min.) - High quality on final DVD (Can be best for short movies)
• High Quality (in iDVD08 or 09) / Best Quality (in iDVD6)
(movies + menus up to 120 min.) - slightly lower quality than above
But still same answer
• Shorten it - or -
• Use Roxio Toast™
• or DL-DVDs (to me they don't work OK - but that's just me)
Yours Bengt W