Hi,
There are topics about RTMP. Please check
https://devtalk.nvidia.com/search/more/sitecommentsearch/rtmp/
Basically it is ‘flvmux ! rtmpsink’. you should utilize tee to run:
... ! nvv4l2h264enc ! tee name=Tee Tee. ! queue ! h264parse ! flvmux ! rtmpsink Tee. ! queue ! h264parse ! mpegtsmux ! filesink