How to get source resolution to rabbitmq

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU) GPU/Jetson
• DeepStream Version 5.0
• JetPack Version (valid for Jetson only) 4.4

Hi I am looking at doing analytics such as line crossing and occupancy dwell etc as a post processing using the broker to a rabbitmq. I have managed to create the first post processing module to determine if a tracking id has cross a predefined line but I have now run into a scaling issue in that the detections are sent to the broker in the source resolution and my line draw is fixed at 1920x1080. I need to add a scaling factor to the detections so am looking at how I get the source resolution and attach to meta for the broker to send

Please refer to structure _NvDsFrameMeta, source frame info stored here.

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