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Video Output: Overview
With the VR-400UHD, you can freely arrange multiple input videos and combine them into a single screen.
The combined video image is called a "scene". You can switch between output videos for each scene. The scene preview is shown on the built-in
monitor, letting you check the preview while switching between scenes.
By preparing the scenes beforehand according to how the event proceeds, including the titles and captions as well as the screen layout, you can
smoothly operate this unit and produce a video with a live-action feel.
How the scenes are organized
Each scene is composed of three layers: a background layer, layer 1 and layer 2.
On each layer, you can display the input video signal from the HDMI 4K IN connector and the still images imported into this unit. You can also use
the crop function to cut out a certain part of the input video or still image.
It's easy to create the screen layout you want just by enlarging or shrinking the layer window (display region) or by moving a window to the
desired location. You can also use the luminance key or chroma key on layers 1 and 2 to create a key composite video.
Scene organization
Layer 1
Layer 2
Background
¹ The layer stacking order cannot be edited.
¹ You can choose whether to show or hide each
layer.
Number of scenes that can be created
Each group of eight scenes is managed as a "bank".
The VR-400UHD has eight banks, so you can create a total of 64 scenes (8 scenes × 8 banks).
DSK layer
A DSK layer is positioned in front of the scenes. The DSK layer lets you use DSK composition to add video or text (titles, captions, etc.) to a scene.
Scene
Scene
DSK layer
¹ Video on the DSK layer cannot be magnified or reduced.
¹ In addition to the DSK layer, you can composite the still image from the
logo layer, but only for video output from the 4K STREAMING port.
Outputting separate scenes to different output destinations (Dual mode)
There are two methods of outputting a scene: PGM/PST mode (factory setting)
and Dual mode.
For PGM/PST mode, only one scene is output. For Dual mode, two scenes can be
output independently.
This lets you select the optimal scene to match output destinations for different
purposes (example: for stage use and for streaming).
MEMO
¹ You can use two video buses, PGM 1 and PGM 2 in Dual mode. You can also
set the video bus assignment for each output connector.
Scene switching is always performed as a freeze-frame cut.
¹ The output method for scenes is set in System mode. For details on System
mode, refer to the Reference Manual (Roland website).
Layer video
Input
HDMI 1
HDMI 2
HDMI 3
HDMI 4-1
HDMI 4-2
HDMI 4-3
HDMI 4-4
Still images (8)
What is a DSK (downstream keyer)?
DSK is a function that lets you composite more video and text on top
of an already composited video.
This is called "downstream keyer" because the key is composited in
the downstream process.
For DSK composition, you can use a luminance key, a chroma key or a
still image (.png) with an alpha channel as the alpha key.
Scene
Enlarge/shrink,
crop,
key composite
Enlarge/shrink,
crop,
key composite
Enlarge/shrink,
crop
Output images in Dual mode
You can use the two built-in monitors on this unit to
select the scene to send to each video bus (PGM 1,
PGM 2).
Layer 2
Layer 2
Layer 1
Layer 1
Background
Background
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