1、doubango官网：http://www.doubango.org/

doubango常用项目国内镜像（放在淘宝的svn服务器），目前有4个项目：doubango, idoubs, imsdroid, telepresence。项目的svn地址如下格式
http://code.taobao.org/svn/【项目名称】/trunk
例如idoubs，可直接http://code.taobao.org/svn/idoubs/trunk，版本以最新2.0为准，去掉了1.0的代码和库，以前的svn log没了

2、doubango是一个开源的VOIP基础平台， 并能用于嵌入式和桌面系统的开源框架，该框架使用ANSCI-C编写，具有很好的可移植性。

3、根据doubango的框架、特点与linphone的对比，显然doubango更适合做视频会议系统和视频会议终端的选择，理由？根据linphone的rtp会话管理可见只适合2方进行视频通话，如要支持多方（>3）视频会议，需MCU配合server进行音视频转发和mix，linphone对于nat穿透的方案只有stun和转发，linphone适合更适合当做一款网络电话终端供普通网民当做视频电话用。

4、doubango包含了 SIP/IMS (VoIP) 的客户端、服务器端的组件。

5、doubango的主要特点

 Powerful MCU (Multipoint Control Unit) for audio and video mixing

 Stereoscopic (spatial) 3D and stereophonic audio
 Full (1080p) and Ultra (2160p) HD video up to 120fps
 Conference recording to a file (containers: *.mp4, *.avi, *.mkv or *.webm)
 Smart adaptive audio and video bandwidth management
 Congestion control mechanism
 SIP registrar
 4 SIP transports (WebSocket, TCP, TLS and UDP)
 SA (direct connection to SIP clients) and AS (behind a server, such as Asterisk, reSIProcate,
openSIPS, Kamailio…) modes
 Support for any WebRTC-capable browser (WebRTC demo client at http://conf-call.org/)
 Mixing different audio and video codecs on a single bridge (h264, vp8, h263, mp4v-es,
theora, opus, g711, speex, g722, gsm, g729, amr, ilbc)
 Protecting a bridge with PIN code

 Unlimited number of bridges and participants

 Connecting any SIP endpoint
 Easy interconnection with PSTN
 NAT traversal (Symmetric RTP, RTCP-MUX, ICE, STUN and TURN)
 RTCP Feedbacks (NACK, PLI, FIR, TMMBN, REMB…) for better video experience
 Secure signalling (WSS, TLS) and media (SDES-SRTP and DTLS-SRTP)
 Continuous presence
 Smart algorithm to detect speakers and listeners
 Different video patterns/layouts
 Multiple operating systems (Linux, OS X, Windows…)
 100% open source and free (no locked features)
 Full documentation
 …and many others

6、doubango架构图

说明：

tinySAK (Swiss Army Knife): Utilities functions (SHA-1, MD5, HMAC, String, List, Timers, Thread, Mutex, Semaphore, ...)
tinyNET: Networking (DNS, DHCPv4/v6, STUN, TURN, ICE, ENUM, Sockets, ...)
tinyHTTP: HTTP stack (CONNECT, DELETE, GET, HEAD, OPTIONS, PATCH, POST, PUT, TRACE, ...)
tinyXCAP: XCAP stack (AUID manager, URL generator) without XML parser (See Java code for parsers)
tinyIPSec: IPSec SA manager. Useless for Android but you MUST have it
tinySMS: SMS over IP (SM-TL, SM-RL) for IMS/LTE networks
tinySIGCOMP: Signaling Compression
tinySDP: SDP protocol
tinyRTP: RTP/RTCP protocols
tinyMSRP: MSRP protocol (Chat and File Transfer)
tinyMEDIA: Media plugins manager (Audio, video, Codecs, sessions, MSRP, QoS, ...)
tinyDAV(Doubango Audio Video): Media plugins implementation
tinySIP: SIP/IMS stack