As pointed out, this seems to be missing a bunch of fields from the broader
template..


On Thu, May 11, 2023 at 2:20 PM Yoav Weiss <[email protected]> wrote:

>
>
> On Tue, May 2, 2023 at 4:29 PM 'Tony Herre' via blink-dev <
> [email protected]> wrote:
>
>> Contact emails
>>
>> [email protected], [email protected]
>>
>>
An explainer is missing, but you provided an inline one above, which is
good enough from my perspective.

A TAG review checkpoint is also missing. At the same time, we probably
don't need to file for one here.


> Spec
>> https://w3c.github.io/webrtc-encoded-transform/#RTCEncodedVideoFrameMetadata
>> particularly
>> PR#173 <https://github.com/w3c/webrtc-encoded-transform/pull/173>.
>>
>>
>> Summary
>>
>> Add a 'timestamp' field to RTCEncodedVideoFrameMetadata containing the
>> presentation timestamp of the associated encoded video frame.
>>
>> Is this feature supported on all six Blink platforms (Windows, Mac,
>> Linux, Chrome OS, Android, and Android WebView)?
>>
>> Yes
>>
>> Risks
>>
>> Interoperability and Compatibility
>>
>> Positive response from all members at W3C WebRTC WG April 2023 Interim,
>> PR landed with no open issues.
>>
>
While I agree that there seems to be general support on the PR, we
typically require formal https://bit.ly/blink-signals


>
>> Ergonomics
>>
>> Added specifically to align with the timestamp field on the WebCodecs
>> <https://www.w3.org/TR/webcodecs/#encodedvideochunk-interface>
>> EncodedVideoChunk
>> <https://www.w3.org/TR/webcodecs/#encodedvideochunk-interface>, and
>> allow matching video frames with the timestamp in the WebCodecs
>> VideoFrame <https://www.w3.org/TR/webcodecs/#videoframe-interface>
>> object.
>>
>> Will also provide the same timestamp already exposed in
>> requestVideoFrameCallback's 'mediaTime'.
>>
>> Is this feature fully tested by web-platform-tests
>> <https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md>
>> ?
>>
>> Tested internally by RTCEncodedVideoFrame-capture-timestamp-id.html
>> <https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/fast/peerconnection/RTCEncodedVideoFrame-capture-timestamp-id.html>,
>> upstreaming to WPT tracked in crbug.com/1441888.
>>
>
It seems easier to land WPT directly with a ".tentative" suffix, and then
rename them.


>
>>
>> Entry on the feature dashboard
>>
>> None, small delta to launched API.
>>
>
> I suspect this resulted in this intent not being captured in our tooling :/
> +Jason Robbins <[email protected]> - FYI
>
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>> .
>>
>

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