Roland V-8HD HDMI Video Switcher and UVC-01 USB Capture Device Kit - Manual (Page 25)

25
Video Operations
Chroma key
This cuts out a video by turning the blue or green portion
transparent, and composites it onto the background video. Using
this, you can composite only a subject that you are photographing
against a blue screen or green screen.
Blue or green
Setting the DSK mode, source and type
1 . Press the [MENU] button 0 ”DSK” 0 select “DSK
MODE”, “DSK SOURCE”, “DSK TYPE”, or “COLOR”, and
press the [VALUE] knob.
2 . Use the [VALUE] knob to change the setting as
shown below.
Menu item Explanation
DSK MODE SELF KEY
DSK SOURCE
Select the source of the video that you want to
superimpose.
DSK TYPE CHROMA
COLOR
Specify either “GREEN” or “BLUE” as the key color
(the color to be removed).
You can also specify a color you desire as the key
color (p. 26).
3 . Press the [MENU] button to quit the menu.
Compositing using chroma key
1 . Output the background video.
At the PVW section of the monitor, check the video to be made
the background.
2 . Press the DSK [PVW] button to turn on the preview
output (lit).
The DSK [PVW] button lights up in green, and a preview of the
composition results is displayed in the PVW section of the monitor.
At this stage, the final output has not yet been changed.
3 . Use the DSK [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.
4 . Press the DSK [ON] button to turn on chroma key
composition (lit).
The DSK [ON] button lights up in red, and the composition results
is sent to final output.
5 . To turn off chroma key compositing, press the DSK
[ON] button once again.
MEMO
5 The fade time over which the video appears or disappears
when you press the DSK [ON] button is specified by the setting
of the TRANSITION TIME menu item “DSK TIME”.
5 By holding down the DSK [PVW] button and pressing the
[MENU] button, the DSK menu appears.
5 You can make DSK/PinP composition (p. 19) turn on/off in
tandem with the video transitions.
& “Turning PinP/DSK composition on/off in tandem with
video transitions” (p. 13)
After step 3, 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.
Using Chroma Key