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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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Restreamer
The Restreamer is a complete streaming server solution for self-hosting. It has a visually appealing user interface and no ongoing license costs. Upload your live stream to YouTube, Twitch, Facebook, Vimeo, or other streaming solutions like Wowza. Receive video data from OBS and publish it with the RTMP and SRT server.
I'm working on this. RTSP and HLS restreaming support, super reliable non-existing database.
If you don't need restreaming or mjpeg support, check out moonfire. It's the only alternative I'm aware of that doesn't use FFmpeg.
You could use datarhei-restreamer for the restreaming part. Then use tvheadend to record the rtmp stream, and also integrate the stream in home assistant. https://github.com/datarhei/restreamer https://hub.docker.com/r/datarhei/restreamer https://hub.docker.com/r/linuxserver/tvheadend