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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.
Finally, consider using a .net integrated version of ffmpeg like https://github.com/cmxl/FFmpeg.NET and write your conversion code around that. That way if you decide to make a UI with a progressbar and everything, you can make it actually work.
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