Dual Layer option grayed out in iDVD '08

Question

I have been struggling to get a movie burned for awhile, partly due to learning the software on my new iMac (2.4 GHz 24") and the other part spent learning the size requirement limits for a Dual Layer disc (not sure I have my project trimmed all the way down yet).
I finally have what I think is a finished project, am ready to try to burn it and all of a sudden iDVD will not allow me to select "Dual Layer" as an option in the Project Info dialog (the option is locked on single layer and grayed out). I tried rebooting and that made no difference. The drive is the built-in DL burner.
This is a new problem as I have been able to make this selection in the past. Any ideas?
Thanks in advance.
-John

Answer 1

Is your project over 60 mins. but under 120 mins.? You'll have to address the project info window like this:
You should have an option available to you under DVD Type to select DL as opposed to SL. If it's grayed out, quit iDvd and and relaunch the app again. You may have to do this more than once (assuming you are using the correct media and that your mac sees the appropriate DL burner).
Plus you must select the appropriate media when burning to DL. I recommend using Verbatim or Maxell while troubleshooting on this forum. Thereafter you can choose whatever works best for you and your mac.
In addition, please read the following from the iDvd08 Getting Started pfd:
Checking the Project Info Window
DVD projects can take up a lot of space on your hard disk, and it’s useful to know when
you need to make more room. In addition, a DVD disc has a maximum capacity. As
you’re working on your project, monitoring its size will ensure that everything fits.
The Project Info window, shown below, provides all this information and more.
To check the size of your project:
m Choose Project > Project Info.
 The total size of your project, in running time (in minutes) and in size (in megabytes
or gigabytes), shows below the Capacity meter on the far right.
 The Capacity meter shows how much of your project’s total size is used by each of its
elements. The bands of color indicate what proportion of the project each element
accounts for.
 The numbers below DVD-ROM, Slideshows, Menus, and Movies specify how much
space (in gigabytes) each uses. When you click these numbers, the display switches
to show the number of these items in your project and how many tracks they use. An
iDVD project can have up to 99 tracks.
DVD-ROM refers to the content you’ve specified to be added to the DVD-ROM
portion of your burned DVD. The running time and size figures that appear below
Menus reflect the total duration of all the menus in the project. You can have a total
of 15 minutes of motion, such as video on buttons or in the background, in all
menus. A project can include up to 99 menus.
In general, the amount of content your iDVD project contains correlates to the quality
of your burned DVD, given the encoding setting you have chosen. The white arrow in
the Capacity meter points to the quality of your burned DVD. Quality is highest on the
green portion of the Quality meter. If you have chosen Best Performance as your
encoding setting, the entire Quality meter may be green.
Hope this helps but if not come on back.
Message was edited by: SDMacuser