salsify is a new design for real-time Internet video that jointly controls a video codec and a network transport protocol. Current systems (Skype, Facetime, WebRTC) run these components independently, which produces more glitches and stalls when the network is unpredictable.
They make some pretty bold claims: In testing, Salsify consistently outperformed today’s real-time video systems in both quality and delay.
Much hype, then not so much code. As of today the last commit was on Jul 19, 2018
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this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1826