|
Unreal Media Server is a streaming server software created by Unreal Streaming Technologies. == Streaming protocol support == * UMS protocol (proprietary) for streaming to Unreal Streaming Media Player on Windows OS * RTMP/RTMPT protocol for streaming to Flash Player on any Flash-enabled OS * Apple Http Live Streaming for streaming to iOS and other HLS-enabled devices * MS-WMSP protocol for streaming to Silverlight, Windows Media Player * MS Smooth streaming protocol for streaming to Silverlight * MPEG2-TS protocol for streaming to Set-Top boxes 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 DirectShow 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 transmuxer: 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; at the same time re-mux it to MPEG2-TS for delivery to Set-Top box, and at the same time send it to iOS devices with HLS protocol. Unreal Media Server is known for low latency live streaming; with UMS, RTMP and MPEG2-TS protocols latencies of 0.2–2 seconds can be achieved when streaming over the Internet; with Apple HLS the latency can be as low as 2.5 seconds. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Unreal Media Server」の詳細全文を読む スポンサード リンク
|