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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.
Aside from the points that /u/captain_wiggles_ pointed out, this is an application which ice40 FPGAs were actually designed for. They are low power (example) and have some features specifically designed for video applications, such as (sub)LVDS inputs and "outputs." Depending on your specs, one of these FPGAs could be a good choice (and you get a nice FOSS toochain as a bonus).
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