Videonics PowerScript PS4000S, Instruction Manual

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Videonics PowerScript Using Roll and Crawl
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Using Roll and Crawl
The Roll & Crawl Controls section provides options for controlling roll and crawl func-
tions.
About Duration
Matching
Two of the Roll & Crawl options ( Duration Target and Duration Matching ) give you the
ability to control how long a roll or crawl takes to complete. This is especially useful in a
live broadcast situation where you have a specific amount of time to complete a roll or
crawl. For example, suppose you have 12 seconds at the end of a documentary to roll the
credits. By setting this as the
Duration Target value, PowerScript attempts to complete the
roll within that amount of time.
Smooth rolls and crawls require that the characters traverse the same number of video
lines each video frame. Therefore, not all speeds look smooth. PowerScript automatically
selects smooth speeds, so the
Target Duration you specify might not be possible. You’ll
know when this is the case by checking the Actual Duration value that PowerScript dis-
plays. In such cases, use the Duration Matching option to have PowerScript calculate other
Actual Duration values based on your preferences (see “Target Options” below). You can
repeat this operation until the Actual Duration meets, as closely as possible, your require-
ments. Read the descriptions of these options later in this section for more information.
Direction
Use one of the four Direction buttons to specify the direction you want for the roll or
crawl. The first button rolls the page upward, the second downward; the third crawls the
page right-to-left, the fourth left-to-right.
Speed
To control the speed of the roll or crawl, enter a value in the Speed text box, or use the
slider to set the speed. Speed can range from 1 to 10, with 1 being the slowest and 10 the
fastest.
Note
With respect to Speed and Duration , PowerScript uses whichever option you last spec-
ified. For example, if you set a specific Speed , PowerScript adjusts the Duration option
accordingly: if you set a specific Duration , PowerScript adjusts the Speed accordingly.
DURATION:
ACTUAL
SPEED:
(SEC.)
TARGET
START STOP
4
12 10
Direction
Speed
Duration
Target
Actual
Duration
Duration Matching
Start/Stop
Options
Roll and Crawl Controls