Function applyConstraints() does not work as expected. Where? - issue is only reproduced on Mac"16 (and probably on iOS.14 but needs to be check) - only on Safari - works on other browsers How? Steps to reproduce: 1. Start video without any constraints. 2. Then try to apply new constraints (1080x720) using applyConstraints() (it is easy to reproduce using https://developer.mozilla.org/en-US/docs/Web/API/Media_Streams_API/Constraints - at the bottom there is box with example so when video is started with empty object and then user tries to apply new constraints - camera starts blinking, there is black screen and then camera is off). Expected result: Constraints are applied properly and camera is on. Actual result: Error - "A MediaStreamTrack ended due to a capture failure" Camera starts blinking, then video went black and camera is off. Additional thoughts: when user applies width: 600 and height: 400 it is working well.
<rdar://problem/72091581>
I would hope this is fixed in latest Safari Tech Preview. The issue might be that the change of preset takes more than 3 seconds, which is quite long and WebKit then assumes the capture failed.
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Closing, @Daria, please reopen if you can reproduce the issue.