Forum Discussion
Video blanks when switch focus to chat or meeting
There is a similar issue open on feedback
Teams meeting causes monitors to go black · Community (microsoft.com)
I would vote up on this, or raise a new issue on feedback if this isn't specifically what you are experiencing. Once done I would open a support ticket referencing the feedback item along with screenshots and OS versions
I could suggest a few things such as updating the Teams client and ensuring all the devices are on the latest version, and clearing the cache of all the devices - and you may want to run through this, but seeing that it occurred suddenly, and its happening in both the web and desktop client experience and to multiple users would suggest its a bug, or something is occurring on Microsoft's end. They will be able to run through all with you, but gathering the above data can shorten the interaction with support.
Thanks for raising, and hope Microsoft resolve it. Once you open a ticket drop the ticket number here and I will raise to Microsoft engineering this end. No guarantees of a response but I can get it in front of them.
Best, Chris
BradSP65 Unfortunately the behaviour of Teams Web app on a Mac has changed today for the worst. Now if you have backgrounds enabled you can not minimize and maximize the video window to get outgoing video to not be black. As of today this does not work and attempts to get the video to function results in Teams now stating that it can not work with the camera and removes all video attempts altogether and disables the camera. The only way to make Teams web now work is to disable all backgrounds removing your privacy. Time to update the ticket.
Man, this thread is wild!
Best, Chris
BradSP65 well today its back to completely broken with back grounds and nothing has changed on my 4 machines. I also confirmed with the mac rumors thread that is running and they confirm it does not work with back grounds. Guess it is up to me to spend my time to debug the microsoft java script and try and resolve what is going on that impacts the application globally. It was almost semi-working prior to the global outage this week. Even that has now gone.
BradSP65 Well since Macos 12.5 came out I upgraded the 2017 MBP to see if that would make any difference to teams PWA. unfortauntely no impact. Reverting Edge right back to 91 version also makes no difference as 91 does not support the background effects but every version in between also displays the exact same problem. So this appears to be aTeams js issue by the looks.
So I guess, time to start now debugging the microsoft javascript to try and get a working version of teams PWA in my spare time. So far I have noticed that babylon 4.2 is used to provide the back ground effects. That turning on the video momentarily flashes and then disappears to black when the following callback is received and logged as an error on the console.
2022-07-23T00:42:57.514Z deviceManager: videoEffectStateChangedEvent onVideoAffectAppliedWeb Call back received
Babylon is only called when enabling the camera. Once the camera is working then switching to external chat or your calendar and then maximising the display does not result in babylon being called again and the video remains running.
So rough estimate just by the console is that babylon.js 4.2 may be a good place to start further investigations within the javascript.
BradSP65 Well after yesterdays outage I thought I would try Teams PWA again. Apple silicon 2022, 2021 and intel 2017, 2015 are all the same. If you have back grounds enabled then the video is black when you join. Black when ever you switch the camera on/off and black whenever you change focus. Its a pointless position and simply means you can have no privacy and use PWA. Unfortunately my company has also closed the ticket as there is nothing they can do other than recognise it as Microsoft Issue and not in their control. My only solution is to now campaign for an alternative to teams i guess because it appears there is no way to provide feedback to get anything addressed.
BradSP65 Appears part of Team web app has now been fixed. At least once your in a meeting the video remains even with background turned on on a MAC. The only issue now is that if you join a meeting with background effects you get black video. Need to switch to chat/messages to minimize the video then maximize it to get the video.
- I had an opportunity today to test a 2015 Intel Mac Air running 10.14.6 and an edge version of 99.0.1150.46. This has the exactly same issues with the backgrounds enabled that the video goes black. I suspect this removes the issue of being Edge related or Mac hardware or even OS related. Definitely appears to be an issue with the Teams web code and probably what is being used for the video effects.
- Since there are now other mac users on mac forums reporting the same issue with the PWA I'll see if there is interest there in looking at the javascript code with teams web and see if anyone can identify the exact problem. As it is 100% reproducible on any Mac using teams web and Edge I suspect with the right skilled person that it should be easily identified.