Media composition system with media consolidation

DETAILED DESCRIPTION The media composer according to the invention for editing source material includes apparatus for receiving, digitizing, storing and editing video and audio source material.
Computing apparatus manipulates the stored source material and output apparatus communicates with the computing apparatus for displaying the manipulated material and control information.
The computing apparatus includes JPEG compression apparatus and is programmed so that multiple JPEG resolutions can be displayed, recorded and played back.
In another aspect of the invention, the computing apparatus is programmed to provide motion effects in the displayed material and is further programmed to provide a dial whose rotation rate corresponds to a selected motion effect rate.
Motion effects include forward and reverse variable speed effects, fit-to-fill capability, and strobe motion.
The improved media composer of the invention enables a variety of wipes to be effected, zoom to fill screen capability, pitch change audio scrub, graphics positioning and image capture instrumentation The system also enables sync point editing and slip sync.
The system also provides for a novel mechanical user interface including a track ball and speed control integrated into a single unit.
Importantly, the system also supports a media consolidation process to free up disk space.