Although you may have the QuickTime component, Perian, a better codec pack has now taken its place. The “Codec Pack for All the New Mac Users” may even help out some of the more experienced Mac OS X users with “the native intel builds for AC3 audio/XviD Video, DivX, and WMV” all included.
if i already have perian is it ok to install this? wont there be any conflict? i also have other codecs...