在此页

• 句法
• 用法注意事项
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

fecPacketsReceived 特性为 RTCInboundRtpStreamStats dictionary indicates how many Forward Error Correction (FEC) packets have been received by this RTP receiver from the remote peer. An FEC packet provides parity information which can be used to attempt to reconstruct RTP data packets which have been corrupted in transit.

句法

var fecPacketsReceived = rtcInboundRtpStreamStats.fecPacketsReceived;
					

值

An unsigned integer value which indicates the total number of FEC packets which have been recieved from the remote peer during this RTP session. Forward Error Correction uses an exclusive-or method to perform parity checks on the received data.

By using the FEC parity information to attempt to reconstruct damaged packets, it is possible to avoid the need to retransmit damaged packets, which in turn helps to reduce lag, or the need to skip damaged frames entirely.

注意： This counter may also be incremented when FEC packets arrive in-band along with media content; this can happen with Opus, for example.

用法注意事项

It's possible that a subset of the FEC packets which have been received were discarded instead of being used. This can happen if the packets covered by the FEC packets have already been received successfully or have already been reconstructed using a previously-received FEC packet. This may also happen if the FEC packet arrives outside the window of time in which the client will attempt to use it.

If you wish to know how many of the received packets were discarded, you can examine the value of fecPacketsDiscarded .

规范

规范	状态	注释
Identifiers for WebRTC's Statistics API The definition of 'RTCInboundRtpStreamStats.fecPacketsReceived' in that specification.	候选推荐	初始定义。

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.

No compatibility data found. Please contribute data for "api.RTCInboundRtpStreamStats.fecPacketsReceived" (depth: 1) to the MDN 兼容性数据存储库 .

另请参阅

• RFC 5109 (RTP Payload Format for Generic Forward Error Correction)

元数据

• 最后修改： Apr 9, 2019

相关话题

1. WebRTC API
2. RTCInboundRtpStreamStats
3. 特性

   1. averageRtcpInterval
   2. bytesReceived
   3. fecPacketsDiscarded
   4. firCount
   5. framesDecoded
   6. lastPacketReceivedTimestamp
   7. nackCount
   8. packetsDuplicated
   9. packetsFailedDecryption
   10. perDscpPacketsReceived
   11. pliCount
   12. qpSum
   13. receiverId
   14. remoteId
   15. sliCount
   16. trackId
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