The capture timestamp is in an "Editors can integrate" PR
<https://github.com/w3c/webrtc-encoded-transform/pull/240>, and is
expected to be merged into the spec tomorrow.

On Wed, Feb 26, 2025 at 5:28 PM Chris Harrelson <chris...@chromium.org>
wrote:

>
>
> On Tue, Feb 25, 2025 at 5:28 AM Chromestatus <
> ad...@cr-status.appspotmail.com> wrote:
>
>> Contact emails gui...@chromium.org
>>
>> Explainer
>> https://github.com/guidou/webrtc-encoded-transform/blob/master/timestamps.md
>>
>> Specification
>> https://w3c.github.io/webrtc-encoded-transform/#dom-rtcencodedaudioframemetadata-receivetime
>>
>> Summary
>>
>> This feature consists in exposing to the Web some timestamps that are
>> present in WebRTC encoded frames transmitted via RTCPeerConnection. The
>> timestamps in question are: -Capture timestamp: the timestamp when a frame
>> was originally captured -Receive timestamp: the timestamp when a frame was
>> received
>>
>
> I see receive timestamp in the spec, but not capture timestamp?
>
>
>>
>>
>> Blink component Blink>WebRTC
>> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EWebRTC%22>
>>
>> TAG review https://github.com/w3ctag/design-reviews/issues/1049
>>
>> TAG review status Pending
>>
>> Risks
>>
>>
>> Interoperability and Compatibility
>>
>> Interoperability risk: The main risk is that other browser do not
>> implement this change. However, this change has the support of other major
>> browsers and it is small enough that it should not be difficult to support.
>> Compatibility risk: No compatibility risk as the change is strictly
>> additive.
>>
>>
>> *Gecko*: Positive (
>> https://github.com/w3c/webrtc-encoded-transform/pull/240) No position
>> requested at https://github.com/mozilla/standards-positions since this
>> is a minor addition to an existing spec. Linked to PRs instead (merged into
>> spec or "editors can integrate").
>>
>> *WebKit*: Positive (
>> https://github.com/w3c/webrtc-encoded-transform/pull/237) No position
>> requested at https://github.com/WebKit/standards-positions/ since this
>> is a minor addition to an existing spec. Linked to PRs instead (merged into
>> spec or "editors can integrate").
>>
>> *Web developers*: Positive (
>> https://github.com/w3c/webrtc-encoded-transform/issues/225)
>>
>> *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?
>>
>> N/A
>>
>>
>> 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
>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
>> ? Yes
>>
>>
>> https://wpt.fyi/results/webrtc-encoded-transform/tentative/RTCEncodedFrame-timestamps.html?label=experimental&label=master&aligned
>>
>>
>> Flag name on about://flags None
>>
>> Finch feature name None
>>
>> Non-finch justification None
>>
>> Requires code in //chrome? False
>>
>> Tracking bug https://crbug.com/391114797
>>
>> Availability expectation Feature is available in Chromium in the short
>> term, and eventually available in other browsers.
>>
>> Adoption expectation Feature is used by multiple partners to provide
>> functionality within 12 months of launch in Chrome.
>>
>> Non-OSS dependencies
>>
>> Does the feature depend on any code or APIs outside the Chromium open
>> source repository and its open-source dependencies to function?
>> N/A
>>
>> Estimated milestones
>> Shipping on desktop 135
>> Shipping on Android 135
>> Shipping on WebView 135
>>
>> 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/6294486420029440?gate=5205778715377664
>>
>> This intent message was generated by Chrome Platform Status
>> <https://chromestatus.com>.
>>
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>> .
>>
>

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