Hi,
One possible solution is to link two nvinfer in series such as:
$ gst-launch-1.0 uridecodebin uri=file:///home/nvidia/1080.mp4 ! mx.sink_0 nvstreammux width=1920 height=1080 batch-size=1 name=mx ! nvinfer config-file-path=/home/nvidia/deepstream-4.0/samples/configs/deepstream-app/config_infer_primary_nano.txt unique-id=7 ! nvinfer config-file-path=/home/nvidia/deepstream-4.0/samples/configs/deepstream-app/config_infer_primary.txt unique-id=8 ! nvvideoconvert ! nvdsosd ! nvoverlaysink
You can distinguish the result by unique-id