Apple Final Cut Pro 7 User Manual
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downmixing The process used to combine multiple audio channels into a single stereo
(or dual mono) pair. Also referred to as mixing down.
drop frame timecode NTSC timecode that skips ahead in time by two frame numbers
each minute, except every tenth minute, so that the timecode agrees with the actual
elapsed clock time. (Timecode numbers are skipped, but actual video frames are not
skipped.) This skipping corrects for NTSC’s actual frame rate of 29.97 fps. It corrects for
an inaccuracy of 3 seconds and 18 frames per hour in comparison to actual elapsed time
when non-drop frame timecode is used. To avoid confusion, drop frame timecode should
be avoided in film-based productions. See also
.
drop shadow An effect that creates an artificial shadow behind an image. Typically used
with graphics and text.
dual system recording A recording process in which video is captured on one recording
device and audio is recorded on another. Dual system audio must be synchronized onto
the source videotapes prior to capture, or synced with the video in Final Cut Pro.
duplicate frames indicator Colored bar that appears at the bottom of a clip’s video item
in the Timeline, indicating that frames are duplicated elsewhere in the sequence. Useful
for editing film, where duplicate frames can cause complications during the final negative
cut.
duration A clip’s duration is the length of time between the clip’s In and Out points.
DV A standard definition digital videotape recorder format that records an 8-bit, 5:1
compressed component video signal with 4:1:1 color sampling (PAL uses 4:2:0). Recorded
using 1/4-inch tape. Supports two tracks of audio with 16-bit, 48 kHz audio sampling, or
four tracks of audio with 12-bit, 32 kHz audio sampling.
DVCAM A standard definition digital videotape recorder format that records an 8-bit, 5:1
compressed component video signal with 4:1:1 color sampling (PAL uses 4:2:0). Recorded
using 1/4-inch tape. Supports two tracks of audio with 16-bit, 48 kHz audio sampling, or
four tracks of audio with 12-bit, 32 kHz audio sampling.
DVCPRO A standard definition digital videotape recorder format that records an 8-bit,
5:1 compressed component video signal using 4:1:1 color sampling (PAL uses 4:2:0).
Recorded using 1/4-inch tape. Supports two tracks of audio with 16-bit, 48 kHz audio
sampling.
DVCPRO 50 A standard definition digital videotape recorder format that records an 8-bit,
3.3:1 compressed component video signal with 4:2:2 color sampling. Recorded using
1/4-inch tape. Supports four tracks of audio with 16-bit, 48 kHz audio sampling.
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Glossary