Grass Valley iTX Master Control v.2.3 User Manual
Page 29
iTX-MC User Guide
2-19
iTX-MC system configuration
Activating the Enable Cue-to-First-Frame setting on the
iTX Output Server
While the Imagestore 750 is busy playing out a master control primary event (live source
event), the iTX Output Server‘s E
NABLE
C
UE
T
O
F
IRST
F
RAME
(CTFF) option allows the first
frame of next the cued video clip to be displayed on the iTX Output Server’s SDI output.
Using a a multi-viewer display, operators can then see the first frame of the next video clip
and have confidence in what will actually be taken to air.
Figure 2-4. Illustration of an iTX timeline that uses the CTFF option to preview the next cued clip
By default, the E
NABLE
C
UE
T
O
F
IRST
F
RAME
setting is disabled. Instructions are provided
below for activating the option. Once activated, CTFF is automatically triggered when:
•
A video clip event in the schedule is automatically cued by TxPlay
•
The operator manually cues the next video clip event in the schedule using the iTX
Desktop’s C
UE
N
EXT
control or the S
ELECTED
I
TEM
C
ONTROL
•
The operator manually cues the next video clip event in the schedule by pressing the
iMC panel’s C
UE
N
EXT
button.
Figures
and
demonstrate that CTFF will only occur if TxPlay is idle; meaning that
the iTX Output Server is not currently processing or playing out a video clip. More precisely,
CTFF only occurs when:
•
No clips are present on the timeline (e.g. at start-up)
•
The last clip on the timeline has finished playing more than two seconds ago
•
While displaying bars at startup
Figure 2-5. CTFF does not occur if the current playout event is also a video clip from the iTX Output Server
N
OTE
As per current functionality, the last frame of the previous clip will be repeated if no clip is cued.
Video Clip 1
Master Control Primary 1
Video Clip 2
The video clip is cued and
its first frame is displayed on
the iTX Output Server’s output.
The Master Control primary
event (live source) is currently
playing out on air.
Master Control Primary 1
Video Clip 2
Video Clip 3
The video clip is cued, but its
first frame cannot be displayed
on the iTX Output Server’s output.
The video clip is currently
playing out on air.