Unreal Media Server is a software streaming server offering rich choice of live and on demand streaming functionality. It streams with variety of streaming protocols to deliver content to Flash Player, Silverlight, Windows Media Player, Unreal Media Player, mobile devices and Set-Top boxes. The server supports UMS (our proprietary, DirectShow-based, codec-independent) protocol for streaming to Unreal Media Player in Unicast and Multicast modes; RTMP and RTMPT protocols for streaming to Flash Player; MS-WMSP and MS Smooth streaming protocols for Silverlight and Windows Media Player; Apple HTTP Live streaming protocol for iOS and other HLS-enabled devices; MPEG2-TS protocol for streaming to Set-Top boxes. Adaptive bitrate streaming is supported via RTMP and HLS protocols. Time-shifted playback is supported for Flash Player and Unreal Media Player. Unreal Media Server streams ANY multimedia file format, encoded with ANY codec. Supported container formats include but are not limited to: MP4, ASF, AVI, MKV, MPEG, WMV, FLV, OGG, MP3, 3GP, MOV. Files can be unicasted in "on-demand" mode or multicasted in "live" mode. Playlist functionality is supported. Unreal Media Server is a high performance server software written fully in c++ programming language and utilizing the most efficient mechanisms inbuilt in Windows OS, such as multithreading and asynchronous socket IO. Running on a standard machine, the server can deliver streams to thousands of concurrent viewers while having the least possible footprint on machine's memory and CPU usage.