Check if a source is "No Signal"

Is there a way of checking if a video source is getting “no signal,” perhaps though API. I’m looking to program something, so it’ll alert us not to switch to that camera.


You can use

so via curl:

curl -X GET -u admin:

Parsed result (Pearl-2):


Notice the 0x0 bolded. When this is present, the No Signal image will be displayed in the input.