[Nano] Deepstream-test3-app not working as expected for multiple video source

Hi,
We have optimization in config_infer_primary_nano.txt. Please copy it to overwrite dstest3_pgie_config.txt.

nvidia@nvidia-desktop:~/deepstream_sdk_v4.0_jetson/sources/apps/sample_apps/deepstream-test3$ cp -i ../../../../samples/configs/deepstream-app/config_infer_primary_nano.txt dstest3_pgie_config.txt

And modify paths accordingly:

model-file=../../../../samples/models/Primary_Detector_Nano/resnet10.caffemodel
proto-file=../../../../samples/models/Primary_Detector_Nano/resnet10.prototxt
labelfile-path=../../../../samples/models/Primary_Detector_Nano/labels.txt