介绍了Darwin streaming server(DSS)源码的架构和核心流程；详细分析了Darwin streaming server的关键技术：媒体封包和流量控制；最后给出了Darwin streaming server的应用实例。-This paper introduces the architecture and the core flow of the Darwin streaming server(DSS) source code, then discusses the key technology in detail :Media Data Packetization and Flow Control, at last it shows an example Applications of DSS.