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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.
But, if it's something you want to do, and want to do it inexpensively you want to use Nginx-RTMP - http://nginx-rtmp.blogspot.com/ - this is a free version of AntMedia Server without the $70 per month fee.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.