You need only QuickTime Player and the MPEG-2 Playback Component to view MPEG-2 content. QuickTime Pro is not necessary for playback of MPEG-2 content with the MPEG-2 Playback Component. Apple’s QuickTime MPEG-2 Playback Component is compatible with both QuickTime 6 and QuickTime 7. Apple’s QuickTime MPEG-2 Playback Component for Mac OS X, Mac OS 9, and Windows is an add-on to QuickTime or QuickTime Pro provides the ability to import and play back MPEG-2 content, including both multiplexed (also known as muxed, where the audio and video tracks are interleaved together into one track) and non-multiplexed (also known as elementary) streams.
