Yes smart record is working. You can tee-off the SR bin wherever you want so long as its fed with encoded buffers.
The deeepstream-test5 app shows an example of adding the SR bin before decoding the rtsp source. I’ve also tested it after inference where I re-encode first and it works well here too and will show the bboxes and other metadata in the recorded video. Check the code in deeepstream-test5 to see how to implement it.