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Unreal Media Server

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Unreal Media Server
Developer(s)Unreal Streaming Technologies
Stable release
9.0 / May 5, 2012; 13 years ago (2012-05-05)
Operating systemWindows
Typestreaming server software
LicenseProprietary
Websitewww.umediaserver.net/umediaserver

Unreal Media Server is a streaming server software created by Unreal Streaming Technologies. Unreal Media Server supports proprietary UMS protocol and major industry standard streaming protocols.


Streaming protocol support:

  • UMS protocol for streaming to Unreal Streaming Media Player on Windows OS
  • RTMP/RTMPT protocol for streaming to Flash Player on any Flash-enabled OS
  • MS-WMSP protocol for streaming to Silverlight, Windows Media Player
  • MPEG2-TS protocol for streaming to Set-Top boxes and iOS devices


Proprietary UMS streaming protocol is based on Microsoft DirectShow, and therefore, UMS protocol is codec-independent. UMS protocol realizes a distributed DirectShow graph where source filter resides on the server computer and renderer filter resides on the player computer; a corresponding DirectShow decoder needs to be installed at the player computer/device.


Supported file container formats: MP4, ASF, AVI, MKV, MPEG, WMV, FLV, Ogg, MP3, 3GP, MOV, other containers. Using a DirceShow approach, file content is being demultiplexed from its container for each individual player and being sent to that player via whatever streaming protocol that player needs.


With regards to live video, Unreal Media Server acts as universal re-multiplexer: it receives live streams muxed in different protocols/formats (RTSP-RTP, MS-WMSP/ASF, MPEG2-TS, UMS), demuxes (extracts) the actual elementary streams from these containers, and muxes (packages) it for specific player delivery. For example, it can take a live RTSP stream from IP camera and re-mux it into RTMP/FLV protocol/format when Adobe Flash Player asks for live video; in the same time re-mux it to MPEG2-TS for delivery to Set-Top box.

Industry Reviews and Adoption

Official web site