AJA KONA LHi - Manual (Page 79)

KONA v10.5 www.aja.com 79
Who is Controlling KONA?
There are times when you might have several Quicktime applications open at one time,
and each of these might want to output their video thru the KONA video output. KONA is
very flexible and most applications perform the necessary housekeeping so they work
correctly when they're active and when they're not. This means that the application that
is “active” (in front) will be granted control of the KONA video output. Generally, when
you switch to a different application, the previous application lets go of the video output
and the new application gets control.
Figure 76. AJA Control Panel Control Message
The AJA Control Panel in-use message will tell you the “active” application that has
control of KONA (see in-use message above) and what the format selections are. If you
click on another supported application that is running (such as Adobe Premiere Pro or
AJA TV), the AJA Control Panel in-use message will report the change by displaying the
new “In use” application. If no in-use message is displayed, the AJA Control Panel is in
control of KONA. If no QuickTime applications are running, the board’s state is
determined by the AJA Control Panel application’s settings.
QuickTime Application
Format Selection
If a running QuickTime application uses KONA for capture or output, it controls the
Primary format via its own menus and settings. For example, when the Third-party
editing application is active (it’s the front-most application) and has KONA as its “A/V
Device”, the KONA's Primary format is determined by the application’s “Video Playback”
settings. These format selections are reported in the AJA Control Panel block diagram.
QuickTime applications can start and stop and change modes—even while they are
running. And the behavior of different QuickTime applications can vary: some
applications take control of the interface as soon as they are launched and don't give it
up until they quit, while other applications take control of the interface only when they
are the “front-most” running application and then relinquish control when they’re not.
Even these QuickTime applications may not relinquish control until capture or output
operations are completed.
Control
Recommendations
We recommend you have the Control Panel running and visible at all times. When the
Control Panel is running in the background (not front-most) you can see what the
interface is doing and who has control of it.