Can someone direct me as to how I check whether I have the media formats and codecs that QuickTime Player can play back using my Mac Pro?

I'm trying to use quicktime on my macbook pro but I receive the message below when I make an attemp to use it. Any suggestions?

Media formats supported by QuickTime Player

QuickTime Player natively supports the following media formats and codec components. You can also extend QuickTime to support additional codecs and components.

Below are the media formats and codecs that QuickTime Player can play back in Mac OS X v10.6.x or later: