Hi,
If SliceIntraRefreshEnable=true is set, it encodes stream like:
IDR P P P ... I P P P ... I P P P ...
Does not encode the stream as a periodic wave.
If you use r28 release, please try to set the properties: vbv-size EnableTwopassCBR=true EnableStringentBitrate=true.
There are reference commands in gstreamer user guide:
https://developer.nvidia.com/embedded/dlc/l4t-accelerated-gstreamer-guide-28-2-ga