User manual

4. Web-based Interface
NDF821/NDF821E l User Manual 47
To perform a video recording, you must select MJPEG codec for one of the streams.
4.5.3 Blur Detection
With the Blur Detection enabled, when the camera detects incidents that make video image blur,
e.g. redirection, blocking or defocusing, the camera will generate an alarm and then take a specied
action.
TipCautionWarning
Note
Note that to use the blur detection function, the following two conditions must be met:

You must select MJPEG codec for one of the streams to enable the live view.

You must select H.264 or MPEG4 codec for one of the streams to process the motion detection.
Conguration

Blur Detection: Select Enable to enable Blur Detection; select Disable to disable this function.

Sensitivity: You can alternatively customize the camera’s sensitivity to a blur. The camera will
judge whether it has been tampered based on the sensitivity threshold specied.
Action

OFF: No action will be taken, but an alarm will be logged.

FTP: Recorded video clips/JPEG les will be uploaded to the FTP server when alarm is triggered.

SMTP: Notication email with the recorded JPEG les attached will be sent to the SMTP server.

SD Card: Recorded video clips will be saved to the SD card when the alarm is triggered.
4.5.4 Audio Detection
With the Audio Detection enabled, when the camera detects any sound, the camera will generate
an alarm and then take a specied action.