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Viz Channel Branding User Guide

Version 5.0 | Published July 10, 2023 ©

Video Configuration

To enable video to pass through Viz Engine when no scenes are loaded, you must activate the Matrox Watchdog functionality and enable video to loop through the Matrox X.mio or X.mio 2 board.

Note: The procedure below is not relevant for Viz Engine 3.6 and X.mio 2 plus users.

Configure Viz Engine to Pass through Video as DVE

  1. Start Viz Engine’s configuration tool (Viz Config).

  2. In the Matrox section under the General tab enable Use Watchdog.

    • Use Watchdog: When activated, this setting enables the Matrox X.mio watchdog feature. It defines what kind of key is produced when the watchdog takes over control. Default mode is Inactive. When the watchdog is enabled, turning off the video out will activate the software bypass after a given timeout (see next setting).

  3. Set the Timeout setting (e.g. 100ms).

    • Timeout: Defines the time in milliseconds until the watchdog takes over control. This value should not be smaller than the time of two fields/frames. Default value is 999 milliseconds.

  4. In the Video Output section, tweak the h-phase and v-phase settings to have a glitch free switching to and from the Watchdog.

    • *H-Phase and V-Phase: *Shifts the output signal with respect to the sync signal.

  5. Open the Viz configuration file.

  6. Navigate to the TARGA3200 section and set the following parameters.

    • Set video_loopthrough_mode = 2

    • Set video_loopthrough_reactivation = 1

With these configurations you should have a DVE pass through as long as no scene or DVE is activated on the Viz Engine.


See Also