Roland VR-120HD Direct Streaming AV Mixer - Manual (Page 42)

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Video Composition Operations
Compositing a Still Image with Alpha Channel
Use alpha channels (areas which contain transparency data) to cut out
still images and place them against different background video as a
composite.
Compositing using DSK
This shows how to composite an image using “DSK 1”.
The steps are the same when using “DSK 2”.
1 . Press the DSK 1 [SETUP] button to turn on (lit).
The DSK setup screen appears.
2 . Touch the setup screen to make the following settings.
Parameter Explanation
DSK Mode Alpha Key
DSK Source Specifies the still image with alpha channel.
3 . Press a VIDEO SWITCHER [1]–[8] button to select the DSK
video source.
Magenta: DSK video source
White:
Video input available
Unlit: Video input unavailable
* When selecting a video that is not assigned to Input 1–8, set this in
“DSK Source” on the setup screen.
MEMO
You can also directly touch the multi-view, input-view or still-view
screens to select a video signal.
4 . 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.
5 . Touch the setup screen to adjust the intensity of the effect.
Parameter Explanation
Mix Level Adjusts the key’s overall density (output level).
Time
Adjusts the fade-in/out time for the DSK video
source.
* For details on the parameters, refer to “6: DSK” (p. 108).
6 . Press the DSK 1 [PGM] button to turn on DSK compositing
(lit).
The composition results is sent to final output.
7 . To turn off DSK compositing, press the DSK 1 [PGM] button
once again.
Turning DSK/PinP composition on/off in tandem
with video transitions
You can make DSK/PinP composition 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 to switch the video. DSK
composition turns on, and the composited result that is previewed is sent
to final output.
Alpha channel
Background video Still image