本文深入探讨了WebRTC技术的核心组件，包括如何使用RTCPeerConnection建立连接，如何配置ICE服务器，以及如何利用DataChannel进行双向数据传输。重点讲解了RTCPeerConnection接口的构造、属性、方法以及状态定义，同时详细阐述了RTCPeerConnection接口的错误处理机制和SDP模型。此外，文章还介绍了如何通过RTCRtpSender和RTCRtpReceiver接口处理媒体流，以及如何使用RTCTrackEvent进行事件监听。
IETF RTCWEB group组讨论p2pweb
Media Capture Task Force讨论Media device
W3C的web Real-Time communications working group讨论以下内容
Table of Contents
- 1.Introduction
- 2.Conformance
- 3.Terminology
- 4.Peer-to-peer connections
- 4.1Introduction
- 4.2Configuration
- 4.3RTCPeerConnection Interface
- 4.4State Definitions
- 4.5Callback Definitions
- 4.6Error Handling
- 4.7Session Description Model
- 4.8Session Negotiation Model
- 4.9Interfaces for Connectivity Establishment
- 4.10Priority and QoS Model
- 4.11Certificate Management
- 5.RTP Media API
- 5.1RTCPeerConnection Interface Extensions
- 5.2RTCRtpSender Interface
- 5.2.1Attributes
- 5.2.2Methods
- 5.2.3Dictionary
RTCRtpParametersMembers - 5.2.4Dictionary
RTCRtpEncodingParametersMembers - 5.2.5Dictionary
RTCRtxParametersMembers - 5.2.6Dictionary
RTCFecParametersMembers - 5.2.7Dictionary
RTCRtcpParametersMembers - 5.2.8Dictionary
RTCRtpHeaderExtensionParametersMembers - 5.2.9Dictionary
RTCRtpCodecParametersMembers - 5.2.10Dictionary
RTCRtpCapabilitiesMembers - 5.2.11Dictionary
RTCRtpCodecCapabilityMembers - 5.2.12Dictionary
RTCRtpHeaderExtensionCapabilityMembers
- 5.3RTCRtpReceiver Interface
- 5.4RTCRtpTransceiver Interface
- 5.5RTCDtlsTransport Interface
- 5.6RTCIceTransport Interface
- 5.7RTCTrackEvent
- 6.Peer-to-peer Data API
- 7.Peer-to-peer DTMF
- 8.Statistics Model
- 9.Identity
- 10.Media Stream API Extensions for Network Use
- 11.Examples and Call Flows
- 12.Event summary
- 13.Privacy and Security Considerations
- 14.Change Log
- A.Acknowledgements
- B.References
呼叫流程
关键几点：
1、调用new RTCPeerConnection(configuration )建立对象RTCPeerConnection
2、configuration has the information to find and access the servers used by ICE（Interactive Connectivity Establishment (ICE) IETF）. There may be multiple servers of each type and any TURN server also acts as a STUN server.
3、An RTCCertificate can be persisted in [INDEXEDDB] and reused. Persistence and reuse also avoids the cost of key generation.
4、createOffer和createAnswer(SDP)
5、Datagram Transport Layer Security (DTLS)
6、RTCDataChannelRTCDataChannelEvent
7、Javascript API[JSEP]: IETF 连接建立API
8、 bindings about Web IDL [WEBIDL] correspond to particular constructs in Java 5 [JLS3].
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