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Re: [mediacapture-main] In-content device selection a mistake. Too complicated, leaks info (#652)

From: Jan-Ivar Bruaroey via GitHub <sysbot+gh@w3.org>
Date: Thu, 19 Dec 2019 02:30:14 +0000
To: public-webrtc-logs@w3.org
Message-ID: <issue_comment.created-567302999-1576722613-sysbot+gh@w3.org>
To clarify, https://github.com/w3c/mediacapture-main/pull/644 doesn't actually remove in-content selection, it removes 1 of 3 decision makers:
1. application
2. ~user agent~
3. user

The _application_ still has full control. Only when it is indecisive, instead or "browser chooses" we'd say "user picks". This removes implementation dependency, improving web compat.

In-content selection would continue to work on browsers that grant all devices. But browsers would also be required to implement a picker when constraints don't reduce to 1 choice (<5% of users?)

Why? Firefox might drop labels to satisfy https://github.com/w3c/mediacapture-main/issues/640 so its in-content selector would be inferior by default:

* Camera 1
* Logitech BRIO
* Camera 3

This is where a spec-mandated picker would be valuable, giving sites A) a choice about whether they want to handle all this complexity or not, and B) a more compatible way to ask users the same thing that works with stricter-permission browsers (like Firefox). A win for privacy.

I'm happy to have in-chrome compete with in-content. I think we can make it superior.

> Headset detection

@juberti How is that done? By the browser or the app? By browser is not web compatible. By app we still have `groupId`.

> and auto-selection?

Not sure what that is, but sites could still select the system default by specifying the first deviceId from `enumerateDevices()` like today if not having a selector up front is truly important to them:
```js
getUserMedia({video: {deviceId: {exact: deviceInfo.deviceId}}}); // Selector-free
```
See https://github.com/w3c/mediacapture-main/pull/644#issuecomment-566248295 for full table.

-- 
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Received on Thursday, 19 December 2019 02:30:16 UTC

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