TAG has just closed this issue as "satisfied" and posted "we are happy to 
see this move forward."

On Thursday, March 10, 2022 at 8:01:59 AM UTC+1 [email protected] wrote:

> On Wed, Mar 9, 2022 at 11:26 AM 'Elad Alon' via blink-dev <
> [email protected]> wrote:
>
>> Contact [email protected]
>>
>> Explainer
>> https://github.com/w3c/mediacapture-handle/blob/main/identity/README.md
>>
>> Specificationhttps://w3c.github.io/mediacapture-handle/identity/
>>
>> Summary
>>
>> We introduce a mechanism that allows an application to opt-in to exposing 
>> certain information to other applications which are video-capturing it. 
>> This allows collaboration between capturing and captured applications. For 
>> example, a VC application that's video-capturing a tab where a presentation 
>> application lives, could expose user-facing controls in the VC tab for 
>> navigating the presentation in the captured tab. 
>>
>> TAG reviewhttps://github.com/w3ctag/design-reviews/issues/645
>>
>
> It seems worthwhile to give the TAG a few more weeks to get back to this, 
> as they may be able to weigh in on some of the open issues.
>  
>
>>
>>
>> TAG review statusPending
>>
>> Risks
>> Interoperability and Compatibility
>>
>>
>> *Gecko:*
>> No signal (https://github.com/mozilla/standards-positions/issues/615)
>>
>> Engaged in discussions in the W3C and approved the adoption of this 
>> document.
>>
>> There is currently a disagreement with Mozilla over issue #11 
>> <https://github.com/w3c/mediacapture-handle/issues/11>. Mozilla suggests 
>> setCaptureHandleConfig() should only be callable once, to reduce the risk 
>> of it becoming an alternative communication channel. We see relevant use 
>> cases that calling it multiple times can enable (e.g. the captured 
>> application changing its state and wants to notify the capturer). We 
>> believe setCaptureHandleConfig() should be callable multiple times.
>> Note that there could be other mitigations for Mozilla's concerns (e.g. 
>> rate-limiting) that will keep the use cases intact.
>> We'd like to ship the API as callable multiple times, while continuing to 
>> discuss this point. This could unfold in several ways:
>>
>>    - We might be able to convince Mozilla of the correctness of our 
>>    viewpoint.
>>    - We might find out that legitimate websites often call 
>>    setCaptureHandleConfig() multiple times (but not excessively), making it 
>>    easier for us to convince Mozilla.
>>    - We might find out that websites rarely call 
>>    setCaptureHandleConfig() multiple times, allowing us to rather painlessly 
>>    change the function to being callable only once.
>>    - We might find out that some websites call setCaptureHandleConfig() 
>>    multiple times in suspicious ways, in which case we'd change the function 
>>    to being callable only once.
>>
>> As part of the launch, we'll add usage metrics and keep close watch for 
>> the possibility of suspicious usage of the type Mozilla is worried about.
>> In either case, we have a reasonable way forward regardless of how things 
>> turn out.
>>
>> *WebKit:*
>> No signal (
>> https://lists.webkit.org/pipermail/webkit-dev/2022-February/032140.html)
>>
>> Engaged in discussions in the W3C and approved the adoption of this 
>> document.
>>
>> *Web developers:*
>> Strongly positive (
>> https://docs.google.com/document/d/12LcwOy6AruoORAP7woswhBgG3cjoxVzQfPUuB6U-Vdo/edit?usp=sharing
>> ) 
>> Strong positive signals from:
>>
>>    - Google (link 
>>    
>> <https://discourse.wicg.io/t/proposal-capture-handle-bootstrap-app-collaboration-when-screensharing/5354/2>
>>    )
>>    - Microsoft (link1 
>>    
>> <https://discourse.wicg.io/t/proposal-capture-handle-bootstrap-app-collaboration-when-screensharing/5354/7>,
>>  
>>    link2 <https://github.com/eladalon1983/capture-handle/issues/1>)
>>    - Citrix (link1 
>>    
>> <https://discourse.wicg.io/t/proposal-capture-handle-bootstrap-app-collaboration-when-screensharing/5354/12>,
>>  
>>    link2 <https://github.com/w3c/mediacapture-handle/issues/14>)
>>    - Zoom (link 
>>    
>> <https://discourse.wicg.io/t/proposal-capture-handle-bootstrap-app-collaboration-when-screensharing/5354/11>
>>    )
>>    - RingCentral (link 
>>    
>> <https://discourse.wicg.io/t/proposal-capture-handle-bootstrap-app-collaboration-when-screensharing/5354/9>
>>    )
>>    - Jitsi (link 
>>    
>> <https://discourse.wicg.io/t/proposal-capture-handle-bootstrap-app-collaboration-when-screensharing/5354/10>
>>    )
>>
>> *Other signals:*
>> N/A
>>
>> Debuggability
>>
>> No DevTools support is needed.
>>
>> Is this feature fully tested by web-platform-tests 
>> <https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md>
>> ?No
>>
>> Tracking bughttps://bugs.chromium.org/p/chromium/issues/detail?id=1200910
>>
>> Launch bughttps://bugs.chromium.org/p/chromium/issues/detail?id=1200907
>>
>> Sample links
>> https://w3c.github.io/mediacapture-handle/identity/demos/remote_control/capturer.html
>>
>> https://w3c.github.io/mediacapture-handle//identity/demos/self_capture_detection/index.html
>>
>> Estimated milestones
>> OriginTrial desktop last 102
>> OriginTrial desktop first 92
>> Link to entry on the Chrome Platform Status
>> https://chromestatus.com/feature/4854125411958784
>>
>> Links to previous Intent discussionsIntent to prototype: 
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/yLTykllpNmI
>> Intent to Experiment: 
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/RKONugfoGwM/m/mpFizHPxAwAJ
>> Intent to Extend Experiment: 
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/eJPOkBGriZc
>> Intent to Extend Experiment Again: 
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/fB3IZDgcoco
>>
>>
>> This intent message was generated by Chrome Platform Status 
>> <https://chromestatus.com/>.
>>
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>>
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