Intent to Ship: echoCancellationMode for getUserMedia()

[Chromestatus]

Contact emails

ol...@google.com, gui...@google.com

Explainer

https://github.com/guidou/mediacapture-main/blob/master/explainer-echo-cancellation-mode.md

Specification

https://www.w3.org/TR/mediacapture-streams/#dom-echocancellationmodeenum

Summary

Extends echoCancellation behavior of MediaTrackConstraints dictionary - former true/false - by values "all" and "remote-only". Allows the clients to modify echo cancellation behavior applied to audio tracks received from microphones, controlling how much of the user system playout (all, or only audio received from PeerConnections) is removed from the microphone signal.

Blink component

Blink>WebRTC>Audio

TAG review

https://github.com/w3ctag/design-reviews/issues/1107

TAG review status

Issues addressed

Risks

Interoperability and Compatibility

None

Gecko: No signal (https://github.com/mozilla/standards-positions/issues/1241) Spec change approved by Mozilla's representative in the WG: https://github.com/w3c/mediacapture-main/pull/1044#pullrequestreview-2861443312

WebKit: No signal (https://github.com/WebKit/standards-positions/issues/507) Spec change approved by Apple's representative in the WG: https://github.com/w3c/mediacapture-main/pull/1044#pullrequestreview-2861451798

Web developers: No signals

Other signals:

WebView application risks

Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications?

None

Debuggability

None

Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?

Yes

Is this feature fully tested by web-platform-tests?

No

Flag name on about://flags

None

Finch feature name

GetUserMediaEchoCancellationModes

Rollout plan

Will ship enabled for all users

Requires code in //chrome?

False

Launch bug

https://launch.corp.google.com/launch/4403929

Availability expectation

Feature is available only in Chromium browsers for the foreseeable future.

Adoption expectation

Feature is used by specific partner(s) to provide functionality within 12 months of launch in Chrome.

Estimated milestones

Shipping on desktop	141
Shipping on Android	141
Shipping on WebView	141
Shipping on iOS	141

Anticipated spec changes

Open questions about a feature may be a source of future web compat or interop issues. Please list open issues (e.g. links to known github issues in the project for the feature specification) whose resolution may introduce web compat/interop risk (e.g., changing to naming or structure of the API in a non-backward-compatible way).

None

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5585747985563648?gate=4921109098790912

This intent message was generated by Chrome Platform Status.

[Yoav Weiss (@Shopify)]

LGTM1

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[Alex Russell]

LGTM2. The extension to a property bag carries some compat risk, but presumably that is reduced with the property bag casting to `true`, and all of its values being some version of truthiness?

Best,

Alex

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[Guido Urdaneta]

On Mon, Aug 25, 2025 at 8:18 PM Alex Russell <sligh...@chromium.org> wrote:

LGTM2. The extension to a property bag carries some compat risk, but presumably that is reduced with the property bag casting to `true`, and all of its values being some version of truthiness?

That's correct.

 

Best,

Alex

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[Chris Harrelson]

LGTM3

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