sip协议中sdp消息姐学习笔记，介绍了sdp消息的组成

不错的视频聊天源代码，借鉴参考研究目前市场常用的视频软件的工作原理-Good video chat source code, reference and learn from the market commonly used video software working principle

音视频聊天演示程序。聊天双方一个作为服务器，一个作为客户机。客户 机呼叫服务器建立连接之后，即可进行音视频聊天――双方都可以看到对方的图像， 可以听到对方的声音。 要求的系统配置：USB摄像头或数码摄像机，声卡，麦克风等。-Audio and video chat demo. Both sides as a chat server as a client. Client calls the server after establishing a connection, you can conduct audio and video chat- both sides can see each other

H323服务器端程序，用到pwlib和openh323 -H323 server, using pwlib and openh323

具有异形窗口的网络电话,可以实现网络通讯,并且可以学习如何创建异形窗口.-With special-shaped windows network telephone, network communication can be achieved, and can learn how to create a shaped window.

使用directshow来进行mpeg-4的视频传输，网络传输使用rtp协议-directshow to use MPEG-4 video transmission, the use of network transmission agreement rtp

一个流媒体的开发源代码C语言函数库，看了就知道。-a Streaming Media Development C language source code libraries, read on to know.

电话会话实现方法源程序-telephone conversation method source

大名鼎鼎的speex语音压缩源码，应用于voip系统-well known speex voice compression souce code,apply to voip system

symbian平台下的基于SIP的简单游戏，可以方便地扩展成VoIP通话。-symbian platform simple SIP-based games, can be easily extended into a VoIP call.

c++的voip应用源码，很简单的一个例子-c++ the voip application source code, a very simple example