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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.
Lua scripts are crazy powerfull and its insane the amount of really awesome plugins that you can find, from cropping a video region to create a new video from that very specific area you selected, to automatic subtitle downdload without you having to do anything. And there's not only lua scripts, but also C and javascript, here's a link with user scripts https://github.com/mpv-player/mpv/wiki/User-Scripts
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Hence, a higher number means a more popular project.