We don’t know anything about the resnet50 model you deploy with. Can you tell us why “net-scale-factor=0” in config_nfer_secondary_test.txt?
All the parameters for nvinfer are explained in Gst-nvinfer — DeepStream 6.1.1 Release documentation.
You need to debug the model output problem by yourself. The tips may be helpful for you! DeepStream SDK FAQ - Intelligent Video Analytics / DeepStream SDK - NVIDIA Developer Forums