ZoneMinder appears to be ok but not perfect. I've seen a bunch of flowers being mistaken for a cat at a higher confidence than the actual kid as a human. 

 Any time with Frigate? I'm still fooling with ZM and learning how things communicate, etc. Frigate looked simpler/easier at first glance.  

 I only shared an anecdote of a ZM user. Haven't used it myself but the anecdote was very recent.