Highlight ROI region on threshold

how do i highlight the ROI region on threshold like an warning .

Eg: if a person crosses the region , and if the threshold=1 , then i need to highlight the regin .

I have everything in place , just on threshold i need to highlight or blink the bounding box

can we had an label to the below property


[overcrowding-stream-0]
enable=1
roi-OC=600;300;600;300;2000;1500;56;828
#no of objects that will trigger OC
object-threshold=1
class-id=-1

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU)
• DeepStream Version
• JetPack Version (valid for Jetson only)
• TensorRT Version
• NVIDIA GPU Driver Version (valid for GPU only)
• Issue Type( questions, new requirements, bugs)
• How to reproduce the issue ? (This is for bugs. Including which sample app is using, the configuration files content, the command line used and other details for reproducing)
• Requirement details( This is for new requirement. Including the module name-for which plugin or for which sample application, the function description)

Gst-nvdsanalytics — DeepStream 5.1 Release documentation (nvidia.com)