Nx Audio Video Mapping

Nx Witness 5.0 introduced Audio Video Mapping, a new feature that allows users to define the audio path in a more flexible way. Users now can specify a device as the audio provider or simply assign a device to play the audio track, allowing you to send the audio stream from one camera to another camera.

The audio setting will be applied to the live stream and archive recording. It will not affect the current Event Rules (e.g. the play sound action will be executed on the selected device of audio output).

Configure Audio Video mapping

1. Right-click on a camera and open > Camera Settings > General.
2. To use the audio from another device (Audio input/ the audio source):
      a. Check the Enable audio option
      b. Select a camera from the dropdown.
   Note: Even if the current camera has no audio input capability, you could still pull the audio source from another device. 
3. To transmit the audio to another device (Audio output/audio destination):
      a. Check the Enable 2-way audio option
      b. Select a camera from the dropdown.
   Note: 2-way audio option is now available for all devices with or without the function.
4. Apply changes

Note: A camera could be the audio source or audio destination for multiple cameras at the same time, but selecting multiple audio sources or audio destinations for one camera is not supported.

Why is there no audio source that could be selected / why is the option grayed out entirely?

There’s a chance that no device that is capable of audio input/output is available in your System. Additionally, please be aware that the audio source dropdown only allows devices from the same server to be selected.

Known Limitations

The audio/video mapping enhances the flexibility and user experience of Nx Witness a lot, but there are some limitations that should be taken into consideration:

• The Audio/video mapping feature cannot be used with virtual cameras.
• The Audio source can only be used for devices on the same server.

Questions

If you have any questions related to this topic, or you want to share your experience with other community members or our team, please visit and engage in our support community or reach out to your local reseller.