Apple Final Cut Pro X (10.1.2) - Manual (Page 480)

Glossary 480
broadcast-safe Broadcast facilities have limits on the maximum values of luma and chroma that
are allowable for broadcast. If a video exceeds these limits, distortion can appear, resulting in
unacceptable transmission quality. You can use the Final Cut Pro video scopes to make sure that
the luma and chroma levels you set stay within acceptable limits.
B-roll A term used to describe alternate footage shot to intercut with the primary shots used in
a program. B-roll is frequently used for cutaway shots.
Browser The Browser displays the clips and projects for the item selected in the Libraries list.
You select clips or portions of clips in the Browser to work with them. Open projects by double-
clicking them in the Browser. You can sort or group items in the Browser by creation date, name,
and duration. You can also view your clips as filmstrips or in a list.
BWF (Broadcast Wave Format) An extension of the WAV file format that includes additional
metadata such as timecode and production information.
CAF (Core Audio Format) Apple’s Core Audio Format (CAF) is a flexible file format for storing
and manipulating digital audio data. It is fully supported by Core Audio APIs on Mac OS X v10.4
and later and on Mac OS X v10.3 with QuickTime 7 or later. CAF provides high performance and
flexibility, and is scalable to future ultra high-resolution audio recording, editing, and playback.
chroma The color information contained in a video signal, consisting of hue, which represents
the color itself, and saturation, which represents the intensity of the color.
chroma key A special effects technique that allows you to derive an alpha channel or matte
from the blue or green background of a video clip in order to make it transparent for the
purpose of compositing it against other clips. Blue-screen technology is what makes weather
forecasters appear to be standing against an animated map, when in reality they’re standing in
front of a blue wall. Also known as blue or green screening. See also alpha channel.
clip The term used to describe a video or audio asset, especially after it has been imported
into Final Cut Pro. Clips appear in the Browser, the Timeline, and the media browsers. Clips in
Final Cut Pro point to (link to) source media files stored on a disk. When you modify a clip, you
are not modifying the media file, just the clip’s information in Final Cut Pro. (This is known as
nondestructive editing.)
clipping Distortion occurring during the playback or recording of digital audio because of a
signal that exceeds the maximum sample value of 0 dBFS.
clip selection A selection of whole clips in the Browser or the Timeline. In contrast to a range
selection, a clip selection is limited to clip boundaries. You cannot adjust a clip selection to
include portions of clips. However, you can add or remove whole clips.
codec Short for compressor/decompressor, or encode/decode. A software component used to
translate video or audio from its current form to the digital compressed form in which it is
stored on a computer’s hard disk. DV, Photo JPEG, and Apple ProRes are common QuickTime
video codecs.
color balance Refers to the mix of red, green, and blue in a clip. In Final Cut Pro, you can adjust
the color balance of the highlights (bright areas), midtones, or shadows (dark areas) of your clip
using the Color Board.
color bars A standard color test signal displayed as columns, often accompanied by a reference
audio tone. Color bars are used to adjust the video signal of the incoming source to maintain
proper color from import through output.
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