Re: [mediacapture-screen-share] Provide a means to select only part of a screen to capture (#105)

@youennf Firefox includes `viewportOffsetX` and `viewportOffsetY` for resulting object returned by `navigator.mediaDevices.getSupportedConstraints()`, though the constraints are not set for the `MediaStreamTrack` of `kind` `"video"`. Is there a specification which clearly indicates which constraints are capable of being applied to a  `MediaStreamTrack` depending on which API is used to get the `MediaStream` and `MediaStreamTrack`?

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Received on Saturday, 4 May 2019 17:41:15 UTC