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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.
I have yet to try NDI, but there seem to be linux packages in a project which seems to be GPL. Unless it requires a proprietary library from the NDI SDK, in which case I'm even doubt that the GPL is a compatible license.
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