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• 句法
• Determining priority
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

RTCIceCandidateStats dictionary's priority property is a positive integer value indicating the priority (or desirability) of the described candidate. During ICE negotiation while setting up a WebRTC peer connection, the priority values reported to the remote peer by a 用户代理 are used to determine which candidates are considered "more desirable". The higher the value, the more desirable the candidate is.

句法

priority = rtcIceCandidateStats.priority;
					

值

A positive integer indicating the priority of the RTCIceCandidate described by the RTCIceCandidateStats object. The value may be anywhere from 1 to 2,147,483,647.

Determining priority

The ICE specification describes how user agents and other software using WebRTC should calculate the priority. The priority of a candidate is calculated using the following variables as inputs:

• The preferability of the candidate type (local, server reflexive, peer reflexive, or relayed)
• The preferability of the candidate's specific IP address (for multihomed agents)
• The candidate's component ID (1 for RTP, 2 for RTCP)

The candidate's priority is computed using the formula ( p _type is the priority of the candidate's type and p _local is the priority of the IP address):

$$priority\quad =\quad { 2 }^{ 24 }\times { p }_{ type }\quad +\quad { 2 }^{ 8 }\times { p }_{ local }\quad +\quad (256\quad -\quad componentID)$$

This is equivalent to mapping the priorities of teh candidate type, the local IP, and the component ID into various bit ranges within the 32-bit priority 值。

规范

规范	状态	注释
Identifiers for WebRTC's Statistics API The definition of 'RTCIceCandidateStats.port' in that specification.	候选推荐	最初的规范。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
port	Chrome No	Edge No	Firefox 27 Alternate Name 27 Alternate Name Alternate Name Uses the non-standard name: portNumber	IE No	Opera ?	Safari ?	WebView Android No	Chrome Android No	Firefox Android 27 Alternate Name 27 Alternate Name Alternate Name Uses the non-standard name: portNumber	Opera Android ?	Safari iOS ?	Samsung Internet Android No

图例

完整支持

完整支持

不支持

不支持

兼容性未知 ?

兼容性未知

使用非标名称。

另请参阅

• RFC 5245: 4.1.2.1 : Recommended Formula section in the ICE specification

元数据

• 最后修改： Mar 18, 2019

相关话题

1. WebRTC API
2. RTCIceCandidateStats
3. 特性

   1. address
   2. deleted
   3. mozLocalTransport
   4. networkType
   5. port
   6. 协议
   7. relayProtocol
   8. transportId
   9. url
4. Related pages for WebRTC

   1. MediaDevices.getUserMedia()
   2. Navigator.mediaDevices
   3. RTCCertificate
   4. RTCDTMFSender
   5. RTCDTMFToneChangeEvent
   6. RTCDataChannel
   7. RTCDataChannelEvent
   8. RTCDtlsTransport
   9. RTCErrorEvent
   10. RTCIceCandidate
   11. RTCIceTransport
   12. RTCPeerConnection
   13. RTCPeerConnectionIceErrorEvent
   14. RTCPeerConnectionIceEvent
   15. RTCRtpReceiver
   16. RTCRtpSender
   17. RTCRtpTransceiver
   18. RTCSctpTransport
   19. RTCSessionDescription
   20. RTCStatsEvent
   21. RTCStatsReport
   22. RTCTrackEvent