Apple Final Cut Express HD - Manual (Page 1090)

1090 Glossary
locked track A track whose contents cannot be moved or changed. In the Timeline, a
locked track is distinguished by cross-hatched lines across the track. You can lock or
unlock tracks at any time by clicking the Lock Track control in the Timeline.
logging The process of entering detailed information about clips, in preparation for
capturing them from videotape.
looping A playback mode in which clips and sequences go back to the beginning
whenever the playhead reaches the end of the media. The Loop Playback command is
in the View menu.
luma Short for luminance. A value describing the brightness of a video image. A luma
channel is a grayscale image showing the range of brightness across the whole clip.
luma key A filter used to key out pixels of a certain luma value (or a range of luma
values), creating a matte based on the brightest or darkest area of an image. Keying
out luma values works best when your clip has a large discrepancy in exposure
between the areas that you want to key out and the foreground images you want to
preserve, such as a white title on a black background. See keying and matte.
luminance See luma.
markers In Final Cut Express HD, points of reference in clips and sequences. Markers
can be placed directly in clips, or they can be placed in sequences in the Timeline ruler.
mask An image or clip used to define areas of transparency in another clip. Similar to
an alpha channel.
master clip A clip in the Browser which controls the relationship to a media file for all
other affiliated clips in your project.
master shot A wide-angle shot that encompasses the entire scene. Traditionally, this is
the first shot that is taken for a scene, and is the shot used as the basis for that scene
when editing.
master tape The final tape that contains a finished program at its highest quality.
Master tapes should be suitable for duplication, broadcast, and archiving.
match frame Match framing allows you to quickly open a master or affiliate clip at the
same frame as the current position of the playhead. When the Canvas is active, the
Match Frame command opens a sequence clip’s master clip at the exact same frame
currently beneath the playhead, and with the same In and Out points set. When the
Viewer is active, the Match Frame command moves the Canvas playhead to an
occurrence of the current frame showing in the Viewer (if one exists).