How to stream Pi camera video over rtsp on jetson nano using python

You can try to set up RTSP server on the Jetson Nano with raspberry pi camera. Please refer to

Q: Is there any example of running RTSP streaming?

Please try with videotestsrc plugin first to make sure it works. And then you can try the command like:

$ ./test-launch "nvarguscamerasrc ! nvvidconv ! nvv4l2h264enc ! h264parse ! rtph264pay name=pay0 pt=96"

On the other Jetson Nano, you can run DeepStream SDK to receive/decode RTSP stream and do inferencing. Please refer to the document(6.0.1):
NVIDIA Metropolis Documentation