1453259 - MediaStreamTrack.getSettings() should report correct resolution for screen capture immediately after applyConstraints() resolves

Status: RESOLVED FIXED

(Core :: WebRTC: Audio/Video, enhancement, P3)

Description

[Andreas Pehrson [:pehrsons]]

Currently the timing around applyConstraints() and getSettings() when there are no capabilities (like screen capture) looks like:
- applyConstraints(newConstraints)
- Select desiredDimensions from newConstraints (one or both of [width, height] may be 0)
- Reconfigure capture with desiredDimensions (if this fails, reject applyConstraints() and early exit)
- (settings.width, settings.height) = desiredDimensions
- resolve applyConstraints()
- frame comes in with actualDimensions
- (settings.width, settings.height) = actualDimensions

When applyConstraints resolves we need to guarantee that the settings are already correct.

Comment 1

[Lukas Kalbertodt]

Attachment: apply-constraints-resolves-too-early.html

This bug affects me too. I attached a simple example. Just click the button and share your entire screen.

Comment 2

[Andreas Pehrson [:pehrsons]]

This was recently fixed by bug 1453269.