Mosaic Video Wall with MaxColor, Ultra, or Omega Series Devices

Jan 15, 2026

Overview

A Mosaic Video Wall allows displays of different sizes and positions to show different portions of a single video source. All displays must be mounted in either landscape or portrait orientation and may be rotated in 90° increments.

Each display acts as a window into a larger virtual image called the Canvas. Every Receiver crops and positions its own view of that Canvas based on physical measurements.

Mosaic Video Walls are supported on all MaxColor, Ultra, and Omega Series Receivers and require no external video wall processor.

Quick Start (Experienced Technicians)

Mount all displays
Measure the overall Canvas
Measure each display’s viewable area and position
Decide how content should align within the Canvas
Send one vw mosaic command to each Receiver

If seams do not line up, the issue is almost always display scaling, source format, or measurement accuracy — not the command.

Requirements

One Receiver per display
All displays rotated in 0°, 90°, 180°, or 270°
justOS firmware B1.2.1 or later
Static IPs and Telnet access (port 23)

Core Concept: Canvas vs Displays

Think of the system as one large image (Canvas) viewed through multiple smaller cutouts (Displays).

The Canvas defines the total video area
Each display defines what portion of that Canvas it shows
Receivers do not scale independently — they crop and position

Download Spreadsheet Assistant

This Excel spreadsheet assists with programming the displays in the Mosaic Video Wall. Make a measurement, enter it in the spreadsheet, and it will provide the command to be sent to each Receiver.

Content Alignment (Critical Decision)

Most video content is produced at a 16:9 aspect ratio. Mosaic Video Walls often are not. Alignment determines how the video is handled when the Canvas does not match the source.

If alignment is not specified, the system defaults to Center.

Alignment Modifier (-a)

Use the -a modifier to control how the video is positioned within the Canvas.

center (default) — Centers the content within the Canvas
fit — Scales and distorts the image to fill the Canvas
tl — Lock to top-left corner
tc — Lock to top-center side
tr — Lock to top-right corner
cl — Lock to center-left side
cr — Lock to center-right side
bl — Lock to bottom-left corner
bc — Lock to bottom-center side
br — Lock to bottom-right corner

Left Img. - **Center** | Right Img. - **Fit**

Best practice: Start with center. Only use fit when content distortion is acceptable or expected.

Measure the Wall

All measurements may be taken in any unit (inches, millimeters, centimeters), as long as the same unit is used consistently throughout the wall.

Measurements are based on viewable pixels only. Do not include bezels, frames, or mounting hardware.

Step 1: Measure the Canvas

The Canvas represents the total video area across all displays. It defines the coordinate space that every Receiver references.

Canvas Width (CW)
Measure from the left-most viewable pixel of the left-most display to the right-most viewable pixel of the right-most display. Display frames and bezels are not included.
Canvas Height (CH)
Measure from the top-most viewable pixel of the highest display to the bottom-most viewable pixel of the lowest display.

Step 2: Measure Each Display’s Viewable Area

Each display’s viewable area defines how large its window into the Canvas will be. Rotation does not change how these measurements are taken.

Viewable Width (VW)
Measure the horizontal distance between the first and last visible pixels on the display, regardless of rotation.
Viewable Height (VH)
Measure the vertical distance between the first and last visible pixels on the display, regardless of rotation.

Step 3: Measure Display Position (Offsets)

Offsets define where each display is located within the Canvas. These values determine which portion of the source image the Receiver shows.

Left Offset (LO)
Measure from the left edge of the Canvas to the left-most viewable pixel of the display.
Top Offset (TO)
Measure from the top edge of the Canvas to the top-most viewable pixel of the display.