So the pipeline runs 30s and it crashes, is that right?
We can first briefly locate the cause of the crash. Could you use gdb tool to debug the location of the crash?
You can also change the nveglglessink to fakesink and see if it still crashes.
You can refer to the link below to get the changes in memory to see if there are any issues such as memory leaks. Capture HW & SW Memory Leak log