Contact emails
gui...@chromium.org

Explainer
https://github.com/guidou/webrtc-encoded-transform/blob/master/audio_level.md


Specification
https://w3c.github.io/webrtc-encoded-transform/#dom-rtcencodedaudioframemetadata-audiolevel


Summary

This feature consists in exposing to the Web the audio level of an encoded 
frame transmitted via RTCPeerConnection and exposed using WebRTC Encoded 
Transform.



Blink component
Blink>WebRTC>PeerConnection


TAG review
https://github.com/w3ctag/design-reviews/issues/1096


TAG review status
Pending


Risks




Interoperability and Compatibility

The interoperability risk is low as all major browsers have consensus around 
it. The main risk is that some browsers take a long time to implement it. The 
compatibility risk is zero, as this is a strictly additive feature that does 
not interfere with existing features.


Gecko: Positive (https://github.com/mozilla/standards-positions/issues/1232) 
The official position has not yet been answered, but Mozilla's representative 
(and co-chair) in the WebRTC WG approved adding this to the spec. 
https://github.com/w3c/webrtc-encoded-transform/pull/253#pullrequestreview-2825299429

WebKit: Positive (https://github.com/WebKit/standards-positions/issues/496) The 
official position has not yet been answered, but Apple's representative (and 
co-chair) in the WebRTC WG approved adding this to the spec. 
https://github.com/w3c/webrtc-encoded-transform/pull/253#pullrequestreview-2844026129

Web developers: No signals

Other signals:


Ergonomics

None



Activation

None



Security

None



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?
Yes
https://wpt.fyi/results/webrtc-encoded-transform/tentative/RTCEncodedAudioFrame-audiolevel.html?label=experimental&label=master&aligned
 
https://wpt.fyi/results/webrtc-encoded-transform/tentative/RTCEncodedAudioFrame-metadata.https.html?label=experimental&label=master&aligned



Flag name on about://flags
None


Finch feature name
RTCEncodedFrameAudioLevel


Rollout plan
Will ship enabled for all users


Requires code in //chrome?
False


Tracking bug
https://crbug.com/418116079


Availability expectation
Feature is available on Web Platform Baseline eventually.


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


Estimated milestones


Shipping on desktop 139

Shipping on Android 139

Shipping on WebView 139




Anticipated spec changes

Open questions about a feature may be a source of future web compat or interop 
issues. Please list open issues (eg links to known github issues in the project 
for the feature specification) whose resolution may introduce web 
compat/interop risk (eg, 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/5206106602995712?gate=5185213466148864


This intent message was generated by Chrome Platform Status.

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