Example System / ONVIF Implementation FAQ 

[Frequently Asked Questions]    [ONVIF]   

Search by question:   

How to implement MotionAlarm (motion detection) event (ET01)

Warning! This is an implementation hint article. Read this first.

Calling sequence

  1. This sequence only applies when Event.Template (explained here) is set to ET01.
  2. Engage event notification sequence.

Event definition

ONVIF-Imaging-Service-Spec-v221.pdf

Message XML example

            <wsnt:NotificationMessage>

                <wsnt:Topic Dialect="http://www.onvif.org/ver10/tev/topicExpression/ConcreteSet">

tns1:VideoSource/MotionAlarm

</wsnt:Topic>

                <wsnt:Message>

                    <tt:Message UtcTime="2008-10-10T12:24:57.321Z">

                        <tt:Source>

                            <tt:SimpleItem Name="Source" Value="[videoSourceToken]" />

                       </tt:Source>

                        <tt:Data>

                            <tt:SimpleItem Name="State" Value="[motionState]" />

                        </tt:Data>

                    </tt:Message>

                </wsnt:Message>

            </wsnt:NotificationMessage>

  • [videoSourceToken]: Must match one of the tokens returned by GetVideoSources
  • [motionState]: true if motion is in progress, false if not.

See also