Apple has updated its multimedia standard QuickTime to version 6.1.
The update is available through Software Update. Apple claims the new version delivers "a number of quality and performance enhancements for audio, video and full-screen playback".
Improvements include: better control and visual quality in MPEG-4 video; new encoder and bit rate controls for Advanced Audio Coding (AAC); and "significant" encode and decode performance boosts when using digital video.
QuickTime Pro has also been improved. Its receives full-screen playback enhancements, and new keyboard shortcuts for controlling movies.