Apple QuickTime 7.2 - Manual (Page 42)

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Exporting Files
with QuickTime Pro
If you want more control over how QuickTime creates
a file, use the Export feature of QuickTime Pro.
With QuickTime Pro, you can export a movie to a number of different file formats, such
as QuickTime movie (MOV), MPEG-4, 3GPP, 3GPP2, AVI, and DV. In addition, you can
export an audio track to several different audio formats, export the individual frames of
a movie as separate image files, or export a text track to a text file.
To see the list of file formats available for a movie open in QuickTime Player, choose
File > Export and browse the list of file format choices in the Export pop-up menu.
About Video and Audio Compression
Because uncompressed video and audio require a lot of disk space to store and a lot of
bandwidth (the rate at which data can be transferred) to deliver, you’ll want to
compress (encode) your movie before sending it to another computer or on the web.
Movies are usually compressed (encoded) as part of the export process.