Connecting the Dots (AV Foundation and QuickTime) http://bit.ly/9CEpCo
It seems increasingly likely that the reason that QTkit hasn’t had much work, is because the focus has gone into recreating what QuickTime does, in iOS, with a plan to move it back to OS X with 10.7.
Remember, Final Cut Pro can’t be “Pure Cocoa” and 64 bit before “QuickTime” is.