The area inside a border that is 5 percent smaller than the overall size of the video frame. Some or all of the Canvas image beyond this border will be cropped by the video display monitor or television. How much is cropped varies among different TV manufacturers.
See also [Title Safe]
AIFF
(Audio Interchange File Format) Apple's native uncompressed audio file format created for the Macintosh computer, commonly used for the storage and transmission of digitally sampled sound.
alpha channel
An image channel in addition to the R, G, and B color channels that is used to store transparency information for compositing. In Motion, black represents 100 percent transparent, and white represents 100 percent opaque.
anamorphic
An image shot in a wide-screen format and then squeezed into 4:3 frame size.
anchor point
In the Properties tab of the Inspector, the point that is used to center changes to a clip when using motion effects. A clip's anchor point does not have to be at its center.
animation
The process of changing any number of variables, such as color, audio levels, or other effects, over time using keyframes or behaviors.
See also [keyframe]
aspect ratio
The ratio of the width of an image to its height on any viewing screen. Standard TV has an aspect ratio of 4:3; HDTV's is 16:9.
See also [high definition]
audio mixing
The process of adjusting the volume levels of all audio clips in an edited sequence, including the production audio, music, sound effects, voice-overs, and additional background ambience, to turn all of these sounds into a harmonious whole.
audio sample rate
The rate or frequency at which a sound is sampled to digitize it. The standard sampling rate for digital audio is 48 kHz; CD audio is sampled at 44.1 kHz.
audio waveform
A graphical representation of the amplitude (loudness) of a sound over a period of time.
AVI
A PC-compatible standard for digital video no longer officially supported by Microsoft but still frequently used. AVI supports fewer codecs than QuickTime does. Some AVI codecs will not play back in QuickTime and will thus be inaccessible in Motion without prior format conversion.
