Roland V-160HD SDI/HDMI Streaming Video Switcher - Manual (Page 33)

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Video Composition Operations
Compositing a Subject and Background (Chroma Key)
Here’s how you can cut out a video by turning its blue or green portion transparent, and then superimpose it on the background video. This lets
you composite a subject that’s photographed against a blue background or green background.
Blue or green
Background video DSK video source
Setting the DSK mode and DSK type
1 . [MENU] button
Ó
“DSK”
Ó
“DSK 1” or “DSK 2
Ó
select
“DSK MODE,” “DSK TYPE,” or “COLOR,” and press the
[VALUE] knob.
2 . Use the [VALUE] knob to change the setting as shown below.
Menu item Setting
DSK MODE
SELF KEY
DSK TYPE CHROMA
COLOR
Specify either “GREEN” or “BLUE” as the key color. You can
also specify a color you desire as the key color (p. 34).
3 . Press the [MENU] button to quit the menu.
Compositing using DSK
Here we explain how to use “DSK 1” for compositing videos.
The operation is the same when using “DSK 2.”
1 . Press the DSK 1 [SOURCE] button to turn it on (the button
lights up).
2 . Press a DSK SOURCE [1]–[10] button to select the DSK
video source.
Magenta: DSK video source
White:
Video input available
Unlit: Video input unavailable
Lit magenta
* When selecting a video not assigned to INPUT 1–10, set this from
the [MENU] button
Ó
“DSK”
Ó
“DSK 1”
Ó
“DSK SOURCE.”
3 . Press the DSK 1 [PVW] button to turn on the preview
output (lit).
A preview of the composition results is displayed in the PVW
section of the multi-view.
At this stage, the final output has not yet been changed.
4 . Use the DSK 1 [LEVEL] and [GAIN] knob to adjust the
degree of effect applied.
Knob Explanation
[LEVEL] Adjusts the degree of extraction (transparency) for the key.
[GAIN]
Adjusts the degree of edge blur (semi-transmissive region)
for the key.
5 . Press the DSK 1 [PGM] button to turn on DSK compositing
(lit).
The composition results is sent to final output.
6 . To turn off DSK compositing, press the DSK 1 [PGM]
button once again.
MEMO
Set the fade-in/out time for the DSK video to superimpose from
the [MENU] button
Ó
“TRANSITION TIME”
Ó
“DSK 1 TIME” or
“DSK 2 TIME.”
Turning DSK/PinP composition on/off in tandem
with video transitions
You can make DSK/PinP composition (p. 28) turn on/off in tandem
with the video transitions.
From the [MENU] button
Ó
“SYSTEM,” set “EFFECTS TRANSITION
SYNC” to “ON.”
After step 4, use the [AUTO] and [CUT] buttons or operate the
video fader to switch the video. DSK composition turns on, and the
composited result that is previewed is sent to final output.