Jitsi meet -> How to trigger a notification if laptop's own camera is closed by hand manually

Hi everyone,

I wonder if we detect that the camera of a laptop is closed by touching the camera switch on the laptop.
I thought that NO_DATA_FROM_SOURCE event on JitsiTrackEvents could handle it, but it doesn’t work.

Can you provide a solution to handle this detection ?

Thanks.

Edit: I mean jitsitrack shows grey-box camera ban image.