Oh yes - run Frigate on a mini PC or home server. It runs best in Docker. And it should work with any cameras that support RTSP and provide H.264 video.

I'm not affiliated btw, but I found the instructions really useful - they walk you through an install of Debian 13 (small version of the OS with minimal components), set up low maintenance options (auto updates etc.), install Docker & Frigate, and set up your cameras for best performance depending on your needs.

Keep everything local (if you want). I also integrate with HomeAssistant and expose that through a free CloudFlare Tunnel for access when away from home.

CloudFlare tunnels by the way - these are a great solution to accessing home-network resources without punching holes / port-forwarding etc. because all the access is outward from the home network, then an authentication layer added by CloudFlare.

Reolink Doorbell PoE, deny it access to the cloud if you want from the router, works well over LAN and can periodically FTP recordings anywhere you want on your local network, plus it has some really nice HomeAssistant integrations (last movement, last animal, last person, last doorbell)

Unifi makes a doorbell and consumer (and commerical) security cameras which run and store data on a local device, but still reachable online with their app connecting directly to your device. I used their dream machine pro with a big HDD, but they're released a few other devices in the last few years which might be cheaper and use SSDs. And I think you could run the stack in docker. But if you want to hack it yourself, there's probably easier projects. If you want to spend a bit more but have everything more or less just work with nice hardware and apps, Ubiquity's Unifi system is really great for home security. Not to mention the wifi and other networking solutions they have.

Frigate is very good: https://frigate.video/

Personally, I use Zoneminder: https://zoneminder.com/ Zoneminder is very "janky" but predictable.

I set mine up about three years ago, and it's been nice and boring since: https://nbailey.ca/post/nvr