QNAP Security VioStor NVR (Version: 4.0.0) - Manual (Page 109)

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5.1.2 Intelligent Video Analytics (IVA)
The NVR supports intelligent video analytics for video data search.
The following features are supported:
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Motion detection: Detects the movements of the objects in the video.
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Foreign object: Detects new objects in the video.
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Missing object: Detects missing objects in the video.
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Out of focus: Detects if the camera is out of focus.
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Camera occlusion: Detects if the IP camera is obstructed.
To use this function, follow the steps below:
1. Enter the playback page. Select one channel and click .
Note: The intelligent video analytics support video search on one IP camera channel only.
2. Select recording type, start time and end time for video search.