Thank you for this info! I tried adding h264parse and rtph264pay but got the could not link rtph264pay0 to rtspclientsink0 error. However, removing rtph264pay and just using h264parse before rtspclientsink allowed the pipeline to run. But it still had the same issues. I found that the idrinterval was not available for the nvv4l2h264enc component in Deepstream 6.2, but updating to Deepstream 6.3 seemed to fix the issue entirely (and also allow me to use idrinterval). With 6.3, the stream now plays well in VLC, FFMPEG, and other video clients.
I believe this may be a related issue, but I’m not sure: Deepstream 6.2version seems not produce idr periodically