Camera Management: Motion - Swann NVR16-7200 User Manual

English
As Motion Detection is the default recording mode for the
NVR, it's worth taking a moment to ensure it is properly
configured.
If the motion detection sensitivity is too sensitive, then the
NVR will record frequently or continually - any benefit of
motion detection will be lost.
If the motion detection sensitivity is not sensitive enough,
then the NVR will not record when it should and may not
record anything at all.
We think that motion detection is the best way to get your
NVR to operate almost autonomously for long periods of
time (typically weeks to months) without you having to worry
about losing old footage.
However, it can be important that it's configured correctly!
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Camera Management: Motion

How Motion Detection Works
The way that the NVR looks for motion is quite straight forward
- it's a process where it compares one frame (that is, a single
image taken approximately a 25th/30th of a second from the
previous image) with the next. A certain amount of "difference"
between these two "frames" is interpreted as motion.
As a result, the NVR is able to detect when there is a change
in the picture. However, this does not necessarily need to be
something moving in the frame. For example, a light being
turned on or off, a lightning flash or even the sun coming out
momentarily on a cloudy day might be enough to trigger the
motion detection on the NVR. However, as these events last
only a moment (and are relatively rare) they will only create
a few very short redundant clips, which will not take up too
much space or pose a problem with scanning through footage.
Here, you'll be able to set the motion detection features of
the NVR for each channel. We suggest that motion detection
is, under most circumstances, the most practical recording
method for the NVR to employ.