用theora来实现视频编码,theora是开源的codec，效率还不错，跟xvid差不错-To achieve with the theora video encoder

Theora open source video codec Manual

Mediastreamer开发手册 Mediastreamer is a library written in C that allows you to create and run audio and video streams. It is designed for any kind of voice over IP applications. It features RTP connectivity, audio codecs (Speex, iLBC, G711, GSM), vi