Web/API/RTCIceCandidateInit/sdpMLineIndex

The optional property sdpMLineIndex in the RTCIceCandidateInit dictionary specifies the value of the RTCIceCandidate object's sdpMLineIndex property.

Value

A number containing a 0-based index into the set of m-lines providing media descriptions, indicating which media source is associated with the candidate, or null if no such association is available.

Note: Attempting to add a candidate (using addIceCandidate()) that has a value of null for either sdpMid or sdpMLineIndex will throw a TypeError exception.

Example

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Specifications

Specification	Status	Comment
WebRTC 1.0: Real-time Communication Between BrowsersThe definition of 'RTCIceCandidateInit.sdpMLineIndex' in that specification.	Candidate Recommendation	Initial specification.

Browser compatibility

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.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
sdpMLineIndex	Chrome Full support Yes	Edge Full support ≤18	Firefox Full support 22	IE No support No	Opera Full support Yes	Safari ?	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

No support  

No support

Compatibility unknown  

Compatibility unknown

See also

• WebRTC API
• RTCIceCandidate.sdpMLineIndex
• RTCPeerConnection.addIceCandidate()
• icecandidate
• Lifetime of a WebRTC session

RTCIceCandidateInit.sdpMLineIndex by Mozilla Contributors is licensed under CC-BY-SA 2.5.