In my opinion, Aperture is the enhanced version of iPhoto. While the latter only allows you to create click-to-play slideshow, Aperture makes it possible to do more to customize a professional slideshow. So let's start to make a slideshow with Aperture and burn to DVD with iDVD. The workflow for Aperture DVD slideshow is Aperture Slideshow -> Export -> High Quality Video -> iDVD Import -> Burn Aperture to DVD.
Start an Aperture Slideshow
It's very easy to create a slideshow in Aperture. Taking Aperture 3 for example, just go through File > New > Slideshow to start an empty slideshow, or choose images in Browser first to generate a slideshow from sleeted images. But you are suggested to make some default settings before creating slideshow and importing images. Among these settings, Aspect Ratio, slide duration, Crop and Transition are probably needed changes. Then, click Import button to open a browser to import images, as well as video and audio files.
Next, lots of time may be required to customize your Aperture slideshow. With Aperture, you could insert a slide (add first and manually sort under Browser view), customize the Ken-burns effect, add texts, and more. Practise your Aperture slideshow until it is perfect. Apple's software is always damn easy to use and perfect results promised.
Note: Before making an Aperture slideshow, you need get Aperture 3 from the Mac App Store for $79.99. Learn more on Apple.com >>
Export first before burning with iDVD
To burn Aperture slideshow to DVD, you need export the slideshow to Mac (Mountain Lion included) first. Since slideshow will be encoded to fit the DVD standard before burning to DVD, you are recommended to select high enough quality settings for the export, for example, 720p HD. The higher, the more time is required to export Aperture slideshow. But you won't get HD video with iDVD because video quality would apparently drop down after burned onto DVD. So to retain high video quality, exporting to HD is very necessary.
Alternative to Aperture, Less Expensive
DVD Slideshow Builder Deluxe makes it easier to create multimedia slideshow with photos, videos, and music by using slideshow themes which could be arbitrarily added in a single slideshow. This ultimate software to weave your photos and video clips into a stunning DVD slideshow and share with your friends. DVD Slideshow Builder is now fully compatible with Windows 10. Get it for only $49.99.