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Serious Magic
DV Rack Field Guide
The Vectorscope converts your video signal and displays it in green under a circu-
lar graticule divided by chrominance or color. The sections provide a means of
measuring the color amplitude and phase relationship of the red, green and blue
values of your video signal. The center of the graticule contains the black and
white portion of the signal.
For example, if you were to point your camera at a very red object, you would see
a signal much like the one in the Vectorscope pictured in this section which
appears exclusively within the red section. If you pointed the camera at a pure
white or black object, the signal would be displayed as a small dot in the center.
When viewing a white card, the Vectorscope can help indicate if the white balance
is off and in which direction. It is also useful for determining the degree of satura-
tion in your signal which is crucial when setting up a green or blue screen shot.
LCDs are notorious for over-emphasizing saturation, particularly of primary col-
ors.
Imagine a world where everyone owns their own Vectorscope. In this world, not
only could you improve the color and white balance of your video while you are
at the shoot, even the hopelessly color blind could pick out matching socks!
You can also use the Vectorscope to maintain color balance between clips and
multiple cameras. This is valuable if you are shooting a scene and the lighting
changes. Your subject may have one skin tone in an earlier scene and suddenly a
different one in the next. Or, in the case of using multiple cameras, shots from one
angle may have a different hue than shots taken from another angle.
The DVR - Digital Video Recorder
The DV Rack Digital Video Recorder enables you to record clips straight to your
hard drive. After you record clips, they’re added to the DVR Clip List. In the DVR
you can scrub through clips digitally and much faster than reviewing tape in your
camera. With one click, you can quickly jump to the frames that you’d like to ana-
lyze, identify any clip quality alerts and then make improvements by adjusting
your camera or lighting on the fly. You can also create clip notes as you go. To
learn more about clip files and formats, see Managing Clips.
The Pre-Roll Recording Buffer
DV Rack actually starts recording before you hit the Record button. Pre-Roll
recording begins as soon as you connect your camera to DV Rack. You can set the