The Nx AI Manager can display the inference speed (FPS) directly on the video feed using the Nx Meta Rules Engine. This works by generating an Analytics Event for each inference result and displaying it as a Text Overlay.
Create an Event Rule in Nx Meta
In the Nx Meta Desktop client, go to the Camera Settings for the camera running the AI plugin that you want to use for the FPS display.
Open Camera Settings from the right-click context menu
Go to the Event Rules section.
Camera Settings — Event Rules tab
Click Add a New Rule.
Event Rules window — click Add to create a new rule
This opens a dialog where you can configure an event rule.
Set the "When" Condition
Source: Select the camera device.
Select the camera as the event source
Event: Select Analytics Event and choose the inference framerate event type.
Select Analytics Event and the inference framerate event type
Set the "Do" Action
At: Select the same camera as the source.
Action: Select Show text overlay.
Set the action to Show text overlay at the source camera
Text: The default text uses $eventText, which contains the inference speed value from the analytics event. No custom text is needed for the FPS display.
Completed event rule — click Save
When the analytics event fires, the inference throughput in frames per second is shown as an overlay on the camera feed.
Inference framerate displayed as a text overlay on the video feed
