Hi,
A valid usecase is to run RTSP streaming. You may check DeepStream SDK:
After the installation through SDKManager, you will see Yolo models in
/opt/nvidia/deepstream/deepstream-5.0/sources/objectDetector_Yolo
Yolov4 is not inculded. You can try the default models first and then try to insert your model.
For RTSP streaming, you can enable it in sink group( type=4 ):
https://docs.nvidia.com/metropolis/deepstream/dev-guide/index.html#page/DeepStream_Development_Guide/deepstream_ref_app_deepstream_app.html#wwpID0E0TB0HA