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Viz Multichannel

Version 4.0 | Published January 23, 2019 ©

Video Configuration

In order for video to pass through Viz Engine when no scenes are loaded you need to activate the Matrox Watchdog functionality and enable video to loop through the Matrox X.mio or X.mio 2 board.

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

To 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 from and to 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