If you're using dockerized services (which are a must for NVidia-based CV, since their CV libraries are a dependency hell), you must use some kind of networking solution to communicate. RabbitMQ might be considered overkill, but it does the job and is robust.
It's not nice to talk that way about others' work, especially when your comment insults, but doesn't provide any insight whatsoever.
Eithen the two processes can share memory, in which case they don't need to communicate via network, much less RabbitMQ, or they can't, in which case the hack wouldn't have worked at all.
I suppose what I meant to say is you need to communicate between processes somehow. Shared memory is fast, but it's hard to communicate with it exclusively - message-based protocols are better suited for that, and most of them are implemented over TCP.
