ViewMaster: On-Screen Configuration

ViewMaster VR is easily configured using the on-screen dialog, accessed from the “CONFIGURE” button on the main screen. You can also access it using the keystroke CTRL-ALT-C

Advanced configuration features are only available in the Web Control Interface. Either click  the “Web Control” button in the footer, or scan the QR code in the on-screen dialog.

From  V1.3.1 onwards, RouteMaster and Audio Listen configuration can only be changed via the web interface.


The video window layout can be a simple grid, where each window has identical size. For a classic Quad Split, use the Grid mode, with 2 rows and 2 columns. For grid layouts, the number of rows and columns can be adjusted independently, allowing up to 36 video windows in total.

From V1.2.0, non-Grid layouts allow each row to contain a different number of windows. For example, the “4:4:2” mode has a first row of four windows, a second row of four windows, and finally a row with two. Other layouts use the same naming arrangement. Additional layout modes feature a single large window with smaller windows around or beside it.

Larger numbers of windows will require more CPU and GPU power, as well as increased network traffic to the ViewMaster PC.


Names of NDI sources can be displayed either above or below the relevant window. It’s also possible to provide custom names for each window using the Web Interface, or via the REST API. Custom names override the source names.


The current layout and arrangement of sources can be saved as a named preset. Presets can also be chosen and loaded from the dropdown.

Video Quality

Normally you would use the “Low” quality setting for video. This uses the NDI low bandwidth “proxy quality” streams to minimize CPU use and network traffic. In some cases you may want a smaller number of high-quality windows using full bandwidth NDI streams. Selecting “High” quality will dramatically increase network and processor load, so should be used with caution.

Audio Metering

ViewMaster can display up to sixteen audio meters for each window.


Enabling “Tallies ” will display Program and Preview tally icons by each video window. These display the current tally status of the video.

Monitor Aspect Ratio

This setting configures the aspect ratio of the window displaying the ViewMaster output. (The aspect ratio of incoming streams is separate – Each stream is resized to fit the available window size). When using full-screen mode, the actual aspect ratio of the monitor overrides this setting.

Full Screen Mode

To use ViewMaster in Full Screen, select a monitor number from the Dropdown menu. If Full Screen is off, ViewMaster can be resized and positioned as a regular Windows application.

The IDENTIFY button displays a window on each monitor, to help you select the correct monitor in multi-monitor systems.

NDI Output

ViewMaster can create an NDI stream containing all video windows, meters and tallies, etc. This stream can be used or viewed with any NDI monitor or software.

The resolution can be specified in the configuration page. The “Free” resolution makes the resolution track the size of the ViewMaster window.

Please note that minimizing ViewMaster to the taskbar, or moving the window partially off-screen will affect the NDI output.
However, the NDI output will continue to run if you switch between separate Windows desktops.

From V1.2.0, the name of the NDI stream created can be adjusted via the Web Control page, and audio from the selected “Audio Listen” window will be embedded in the NDI Output.
For earlier versions, the NDI Output is always labelled “ViewMaster VR”, and does not include any audio.


This allows you to set TCP port used for HTTP access to ViewMaster.  Please see the Web Control page for details.

Show Stats

This option replaces the UMD labels with statistics for frame reception and display rates, etc. This is solely to help Rascular diagnose display issues, and is not intended to be interpreted by users.


RouteMaster can be shut down by just closing the window. If you’re using RouteMaster in Full Screen mode, you can shut down RouteMaster from the configuration screen or the Web UI.