Sets a movie's preferred volume setting. Volume values range from -1.0 to 1.0.
Negative values play no sound but preserve the absolute value of the volume setting.
You may find the constants shown below useful. A movie's tracks may have their own volume settings. A track's volume is scaled by the movie's volume to produce the track's final volume. Click the link to send email to the QuickTime documentation team. This will open an email window with the filename of this page as the subject.