Inside Macintosh: QuickTime Reference
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The exists command
The exists command verifies that an object exists.
exists: Verify if an object exists
exists reference -- the object in question
Result: boolean -- true if it exists, false if not
For example:
tell application "QuickTime Player"
tell movie 1
if exists track "Video Track" then export to file¬
Macintosh HD:Desktop Folder:Sample Movie.pict" as¬
picture
end tell
end tell
© 2000 Apple Computer, Inc.
Inside Macintosh: QuickTime Reference
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