Each element of a QuickTime movie is contained in a separate track. You make a QuickTime movie by adding tracks that point to the media you want to use. The media may be embedded in the movie itself, or reside on a server half a world away. This track architecture is powerful and flexible, providing you with the control and precision you need to create complex interactive movies. Each track represents a unique aspect or ability that you can change over time. A single movie may have many different track types, including video, audio, text, sprite, Flash, HREF, hinting, QuickTime VR, and chapter divisions. Each track, in turn, may possess many modifiable properties.				Checking your tracks You can see what the tracks are in a QuickTime movie. Here’s how: • Open a movie. • Choose Get Info from the Movie menu. This brings up the Info window. • Pull down the left-hand ("Tracks") menu to see the list of tracks. • Select a track, then click on the right-hand ("Properties") menu to see a list of the track’s properties. Enable, disable, extract, and delete tracks. Gain more control over QuickTime tracks with options in the Edit menu. Working with Tracks In some cases you can modify the tracks in a QuickTime movie. Here's how: • Open a movie. • In the Get Info box, select Movie in the Tracks pop-up menu. • In the main Edit menu, you’ll see three options: Extract Tracks..., Delete Tracks..., and Enable Tracks..... • Select Extract Tracks.... A dialog appears asking which track you’d like to extract. Select one and choose Extract. A new movie will be created with just that media track. • Choose Delete Tracks.... Choose the track you want to delete, and it will be removed from the movie. Shift-select to delete more than one track. • Choose Enable Tracks.... Each track is shown with an on-off switch indicating whether it is enabled or disabled. Disabling a track merely hides it and its actions in the movie; you can always restore it by turning it back on. *QuickDraw 3D not supported on Mac OS X.
Types of QuickTime Tracks:
Movie track Contains copyright information, annotations, and other general information on the entire movie.		Video track Digitized video, rendered 3D animation, or any other compiled image sequence, with optional special effects. More on video and audio tracks.
Audio track CD-quality audio or other audio formats. More on video and audio tracks.		Music track MIDI music with QuickTime instruments.
Text track Text imported into QuickTime for titles, subtitles, credits, notes, and other uses. More on text tracks.		Chapter track A type of text track that divides the movie into randomly-addressable chapters. More on chapter tracks.
Sprite track Contains one or more small images with animatable, programmable behaviors; useful for signs, symbols, games, and effects. More on sprites.		3D track* Contains 3DMF (QuickDraw 3D metafile) objects.
Flash track Incorporates .swf Flash animation. More on Flash tracks.		QuickTime VR or VR object track QuickTime VR information for object movies. More on QuickTime VR.
QuickTime VR panorama track QuickTime VR information for panorama movies. More on QuickTime VR.		HREF track Text track containing interactive or automatic URL links. More on HREF tracks.
Streaming track Contains a reference to a live stream or a movie on a streaming server. More on streaming.		Hint track Contains information that allows a streaming server to deliver a media track as a real-time stream. More on hint tracks.

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