Open Bug 1786517 Opened 2 years ago Updated 2 years ago

The video streaming sent from a MacOS11 flashes on a Windows10 system (Zoom video call)

Categories

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

Desktop
All
defect

Tracking

()

Tracking Status
firefox-esr91 --- unaffected
firefox104 --- affected
firefox105 --- affected
firefox106 --- affected

People

(Reporter: danibodea, Unassigned)

Details

Attachments

(2 files)

Attached image flash zoom.gif

Note

  • When the user on a Mac OS 11 (MacBook Air 2013) makes a Zoom video room and another user using a Windows 10 joins it, the video streams on the windows 10 have a severe flash when the Mac OS has webcam video active.

Found in

  • Release v103.0.2

Affected versions

  • Nightly v106.0a1 (win10)
  • Release v104.0 (win10)

Tested platforms

  • Affected platforms: Mac OS 11 (MacBook Air 2013) -> Windows 10 (desktop)
  • Unaffected platforms:
  • does not occur when ANOTHER Windows 10 joins the call
  • does not occur when a Ubuntu 22 joins the call

Steps to reproduce

  1. Make a zoom videocall room on a Mac OS 11 (MacBook Air 2013)
  2. Join the room using the (apparently specific) Windows 10 system.
  3. Enable the webcam stream on the Mac OS.

Expected result

  • The video stream works correctly.

Actual result

  • The entire web content area flashes when the Mac OS video stream is active.

Regression range

  • First bad: 2022-06-11
  • Last good: 2022-06-10
  • The mozregression bisection stopped so an exact pushlog or regressor could not be determined.

Additional notes

  • additional_note1

The about:support file taken from the Windows 10 system that shows the issue.

Has STR: --- → yes

Thanks for filing this bug and for finding a regression range. Zoom does not use WebRTC for video encoding or decoding, instead they opt to roll their own using JS codecs. That means the cause be a change to any number of components. I think this is unlikely to be a WebRTC related issue.

Severity: S2 → S4
Priority: -- → P3
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