30X Cam + Orin NX 16GB with InHouse Carrier Board

please see-also Orin FAQ,
for instance,

On JP6 the allocation of hardware resource is refined. If hardware resource is insufficient, it fail to create the process.
so, for running 8+ decoding/encoding tasks, please create multiple threads in single process.
Some discussion in the topic: InitNVDEC: Host1x channel open failed