Is there any way to convert video and audio content from Real Video or QuickTime formats with Media Creator 10 to DVD format?

Real Video - very difficult (it's a proprietary format)

Quicktime - that should be managable with Creator 2009 (not sure about 10) but you will probably need the Apple codecs installed

There are programs that will convert Real - but they have to be purchased from outside sources - google for realtime conversion to find those

No, on the Real (pure junk) Video.

... and I would think if you do output a quicktime production to dvd, the quality of the dvd's picture will suffer. The video compression technology quicktime uses doesn't typically look good blown up. Have you viewed your quicktime movies on a full screen on your pc?

And if you bought the quicktime movie from Apple's itunes store, you have DRM issues.