Hi,
There is a know memleak. Please apply the patch.
https://elinux.org/L4T_Jetson/r32.2.1_patch
[MMAPI][DS4.0] Memory leak in MJPEG decoding
With patch being applied, we can launch E-Con See3CAM_CU135 in executing the command:
$ sudo jetson_clocks
$ ./test-launch "v4l2src device=/dev/video1 io-mode=2 ! image/jpeg,width=3840,height=2160,framerate=30/1 ! nvjpegdec ! video/x-raw ! omxh265enc ! rtph265pay name=pay0 pt=96"