RTCRemoteInboundRtpStreamStats: fractionLost property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The fractionLost property of the RTCRemoteInboundRtpStreamStats dictionary provides a value that can be used to determine the fraction of packets lost for this synchronization source (SSRC) in the last reporting interval.
To convert the value to a percentage, divide it by 256 and multiply by 100. For example, a value of 20 indicates a 7.8% packet loss.
Note that the value may not be precisely accurate due to the way that it is calculated, but it does provides a quick and convenient measure of the link quality.
Value
A number giving the fraction packet loss in the last reporting interval, multiplied by 256. The value is 0 if the calculated packet loss is negative.
Note:
The value comes from the 8-bit fraction lost field of the last Sender Report (SR) or Receiver Report (RR) RTCP packet.
The algorithm for calculating the value is defined in RFC 3550, Appendix A.3: Determining Number of Packets Expected and Lost.
Specifications
| Specification |
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| Identifiers for WebRTC's Statistics API # dom-rtcremoteinboundrtpstreamstats-fractionlost |
Browser compatibility
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fractionLost in 'remote-inbound-rtp' stats
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