Writing metadata to the Analytics Stream

[ThenoobMario]

Hello,

I am making an analytics application using acap native SDK 4. After going through the examples and understanding the different components that I need to stitch together, I am stuck on how to integrate my generated data into the analytics stream.

Is there something that I need to do with Axevents API? Can it write data to the analytics stream? If yes, what parameters do I pass? Is there an alternative way of sending such data?

Thank you for your time.

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[rocky-ji]

Not too sure about which kind of medadata, if it is some result such as license plate number/OCR/value/postion/object type/event triggered, you can use the axevent, then you should be able to view the result via Axis metadata monitor.
https://www.axis.com/developer-community/axis-metadata-monitor
or if it is just an event trigger, most VMS such as Milestone/Genetec/ACS should also receive this without any extra integration.

if you want to add metadata to overlay, so in the live rtsp stream you can still view the track or object, you can use Axoverlay API.
https://github.com/AxisCommunications/acap-native-sdk-examples/tree/main/axoverlay

[ThenoobMario]

Hello,

Thank you for your reply. I have gone through both of the examples you mentioned.

However, according to this link here, there are three streams out of which one is the Analytics stream. It shares data continuously with the VMS. I was hoping to integrate my object detection output directly with that stream.

I am not sure if there are methods in place that let us access them.

[rocky-ji]

if you use the axevent to send metadata, you should be able the observe the data with AxisMetadataMonitor.

[shadysp]

See example send_event.c, this example is using tns1 name space for ONVIF.

And ax_event_property_state_declaration_example.c, is using tnsaxis name space for axis own VAPIX.