Stopping the camera whilst screensharing does not turn the webcam LED off on my mac

[germain-gg]

Steps to reproduce

1. Start a VoIP call with camera on
2. Start screensharing
3. Stop camera

What happened?

Camera has stopped, but the "green" LED that indicate that the webcam is active is still on

What did you expect?

I would expect that LED to switch off and the camera to stop recording

Operating system

macOs

Browser information

Chromium Version 92.0.4515.131

URL for webapp

app.element.io / Element Desktop

[SimonBrandner]

AFAICT, this has nothing to do with screen-sharing. This is a general regression

[SimonBrandner]

Oh no, this isn't a regression, this is a general Chromium issue

[SimonBrandner]

This is an upstream issue, see https://bugs.chromium.org/p/chromium/issues/detail?id=642785

[germain-gg]

After discussing with Simon, it turns out this is a compatibility issue where disabled stream keep the LED turned on.
Other vendors can potentially remove the video track altogether but this was decided otherwise in Matrix as part of the MSC process, view matrix-org/matrix-spec-proposals#3291

Closing as this is already tracked on Chromium's issue board bugs.chromium.org/p/chromium/issues/detail?id=642785