From a DIY relatively easy perspective most NAS box (Synology & QNAP) come with "Surveillance Station" type software that handles network cameras and ring buffer storage of footage with addons for { motion detection | face recognition | alerts ( SMS | text | email ) | etc. }
The consumer boxes typically have something like Two Cameras Free (flat rate one time fee for each extra camera ($50 each for Synology)).
I believe (but haven't recently checked) that FreeNAS | TrueNAS setup's likely come with open source camera software .. YMMV.
The NAS advantage is you can have a single central home NAS box doing home storage and camera footage storage - disadvantage (of single box) is having camera footage "seized" by police or intruders in event of incident, yada yada ya.
I should know more but I still use software I wrote years back for handling images & footage from exploration geophysics craft ( cars | boats | airframes ) because "it was sitting about and worked".
The consumer boxes typically have something like Two Cameras Free (flat rate one time fee for each extra camera ($50 each for Synology)).
I believe (but haven't recently checked) that FreeNAS | TrueNAS setup's likely come with open source camera software .. YMMV.
eg: (first hit) https://dongknows.com/synology-surveillance-station-review/
The NAS advantage is you can have a single central home NAS box doing home storage and camera footage storage - disadvantage (of single box) is having camera footage "seized" by police or intruders in event of incident, yada yada ya.
I should know more but I still use software I wrote years back for handling images & footage from exploration geophysics craft ( cars | boats | airframes ) because "it was sitting about and worked".