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QuickTime is software that
handles and displays any type of time-based media, most commonly digitized
video and audio. Quicktime can also handle virtual reality (QTVR)
files. QuickTime files are called "movies."
QuickTime stores data separately
in tracks. Tracks can be edited individually, even though they are synchronized
during playback. You can move tracks from one movie to another, turn
a track on or off, delete tracks, or modify the information contained
in a track. The primary track types are:
- Video tracks - containing
digitized video or computer-generated animations
- Sound tracks - containing
digitized audio and music
- Music tracks - containing
Musical Instrument Digital Interface (MIDI) information. Music tracks
are very small because they only contain text information to control
a synthesiser
- Text track - to caption
or index a movie. Text tracks are searchable, so viewers can search
for key words to find precise points in the movie
- QuickTime 3D track - containing
geometric definitions of 3D objects
- Sprite tracks - containing
graphic objects (called "sprites") that can be moved and resized independently.
These are used to make movies interactive.
- QuickTime VR tracks
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