Using Roll And Crawl; Roll And Crawl Controls - Videonics PowerScript PS4000S Instruction Manual

Videonics PowerScript

Using Roll and Crawl

The Roll & Crawl Controls section provides options for controlling roll and crawl func-
tions.

Roll and Crawl Controls

Two of the Roll & Crawl options (Duration Target and Duration Matching) give you the
About Duration
ability to control how long a roll or crawl takes to complete. This is especially useful in a
Matching
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.
Use one of the four Direction buttons to specify the direction you want for the roll or
Direction
crawl. The first button rolls the page upward, the second downward; the third crawls the
page right-to-left, the fourth left-to-right.
To control the speed of the roll or crawl, enter a value in the Speed text box, or use the
Speed
slider to set the speed. Speed can range from 1 to 10, with 1 being the slowest and 10 the
fastest.
Direction
Start/Stop
Options
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.
START STOP
4
SPEED:
TARGET
DURATION:
12
(SEC.)
Duration
Target
Duration Matching
Using Roll and Crawl
Speed
ACTUAL
10
Actual
Duration
99