Large application doesn't use all available resources

Please apply this to run VIC engine at max clock:
Nvvideoconvert issue, nvvideoconvert in DS4 is better than Ds5? - #3 by DaneLLL

and there is property in nvv4l2h264enc:

  maxperf-enable      : Enable or Disable Max Performance mode
                        flags: readable, writable, changeable only in NULL or READY state
                        Boolean. Default: false

Please enable the property and check if the performance gets better.

Besides, for maximum throughput of GPU, please execute sudo nvpmodel -m 2 and sudo jetson_clocks. This is 15W mode and you may also try 20W mode.