Grass Valley Maestro Master Control v.2.4.0 - Manual (Page 421)

417 MAESTRO User Manual
Section 10 — Pre Roll Take Feature
onds:frames format. This defined Pre Roll time will stay in effect until it is
changed by entering a new user-defined Pre Roll Time.
The maximum pre-roll duration is based upon video standard. The valid
range for a Pre Roll time is 0 seconds and 0 frames (0:00) to the maximum.
The maximum pre-roll duration is based upon video standard.
• A 30 frame video standard’s maximum would be “9:29.”
• A 25 frame video standard’s maximum would be “9:24.”
The following actions will occur when a Pre Roll time is entered that is
outside the valid range:
• If a Pre Roll time has been entered in the GPIO Definition Table, the Pre
Roll duration entered in the GPIO definition table will be applied.
• If there is not a Pre Roll time entered in the GPIO Definition Table, the
entry will be ignored.
The Source Assignment panel is located in the top-right corner of the
Maestro Hardware Control panel. It can also be accessed by clicking the
Source Assign button in the Top-left corner of the GUI panel ( Figure 320 on
page 417 ).
Figure 320. Source Assign Button on the GUI CP
Follow these steps to define a Pre Roll duration using the Source Assign-
ment sub-panel (
Figure 321 ):
1. Enter the preferred Pre Roll time by pressing the number pad keys on
the Source Assignment sub-panel for the chosen time. All of the
significant digits must be entered in the seconds:frames format.
For example, a transition time of 4 seconds requires pressing the 4, 0
and 0 keys. Only pressing the 4 key will result in a 4 frame transition.
2. Press the Send button. The Pre Roll button in the Source Assignment will
then be illuminated ( Figure 321 ).
Location of the
Source Assign
Button