QNAP VS-2004L en - Manual (Page 128)

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5.1.4 Intelligent Video Analytics (IVA)
The NVR supports intelligent video analytics for video data search.
The following features are supported:

Motion detection: Detects the movement of the objects in the video.

Foreign object: Detects new object in the video.

Missing object: Detects missing object in the video.

Out of focus: Detects if the camera is out of focus.

Camera occlusion: Detects if the IP camera is obstructed.
To use this function, follow the steps below:
1. Open the VioStor Player. Add video files to the playlist from the local PC or search for
the video files on the NVR.
Note: The intelligent video analytics support video search on one IP camera channel only.