RTCInboundRtpStreamStats: packetsLost property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2020.

The packetsLost property of the RTCRemoteInboundRtpStreamStats dictionary returns the total number of RTP packets lost from the synchronization source (SSRC) since the beginning of reception.

Note that this can be negative.

Value

An integer value.

The value is determined by subtracting the number of packets received from the number of packets that are expected. The number of packets that are expected is calculated in a way that assumes that all packets only need to be sent once (based on sequence numbers), while the number of packets received also includes any packets that had to be resent (and hence may be bigger). For more information see the "cumulative number of packets lost" section in RFC 3550, section 6.4.1.

Specifications

Specification
Identifiers for WebRTC's Statistics API
# dom-rtcreceivedrtpstreamstats-packetslost

Browser compatibility

desktop mobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
packetsLost in 'inbound-rtp' stats
Chrome – Full support
Chrome 80 (Release date: 2020-02-04)
footnote Full support
Edge – Full support
Edge 80 (Release date: 2020-02-07)
footnote Full support
Firefox – Full support
Firefox 72 (Release date: 2020-01-07)
footnote Full support
Opera – Full support
Opera 67 (Release date: 2020-03-03)
footnote Full support
Safari – Full support
Safari 13.1 (Release date: 2020-03-24)
footnote Full support
Chrome Android – Full support
Chrome Android 80 (Release date: 2020-02-04)
footnote Full support
Firefox for Android – Full support
Firefox for Android 79 (Release date: 2020-07-28)
footnote Full support
Opera Android – Full support
Opera Android 57 (Release date: 2020-03-30)
footnote Full support
Safari on iOS – Full support
Safari on iOS 13.4 (Release date: 2020-03-24)
footnote Full support
Samsung Internet – Full support
Samsung Internet 13 (Release date: 2020-12-02)
footnote Full support
WebView Android – Full support
WebView Android 80 (Release date: 2020-02-04)
footnote Full support
WebView on iOS – Full support
WebView on iOS 13.4 (Release date: 2020-03-24)
footnote Full support

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

See also