RTCInboundRtpStreamStats: nackCount property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The nackCount property of the RTCInboundRtpStreamStats dictionary indicates the number of times the receiver sent a NACK packet to the sender.

A NACK (Negative ACKnowledgement, also called "Generic NACK") packet tells the sender that one or more of the RTP packets it sent were lost in transport.

Value

A positive integer.

Specifications

Specification
Identifiers for WebRTC's Statistics API
# dom-rtcinboundrtpstreamstats-nackcount

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
nackCount 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 55 (Release date: 2017-08-08)
footnote Full support
Opera – Full support
Opera 67 (Release date: 2020-03-03)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 80 (Release date: 2020-02-04)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 57 (Release date: 2020-03-30)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No 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 – No support
WebView on iOS
footnote No support

Legend

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

Full support
Full support
No support
No support