Camera freezes in Teams

Had the same problem. Registry Hack did not work.

Solved by deleting nonpresent camera devices in Device Manager. 

At command prompt

set devmgr_show_nonpresent_devices=1
start devmgmt.msc

click view menu

click Show Hidden Devices

In my case, there were duplicate greyed out camera devices, i had to delete.

Be careful. Don't delete things you do not know / understand.

Maja Kaczmarska

Christian_Stokes 

This issue can be resolved in Command Line using an elevated command. Launch CMD as administrator and then type the following command:

chkdsk /f/r

and then it will tell you that it will need to run at the next boot and want to know if that is okay. Say Y

then restart the machine. 

Before doing, it is best to ensure you have your machine up to date with windows and system updates, depending on the type of device you are using, just to ensure drivers are updates, etc. But the chkdsk /f /r command will fix the issue for you.

Once you restart the machine, be patient, it's going to look like a command line screen and/or will have some copy along the bottom of your screen for a bit as it's cycling through all the file directories, RegEdit, etc. it can take 20- to over an hour to complete depending on your system

Christian_Stokes 

Hi,

I have freeze problem on external UVC device attached to a notebook, built-in camera works well without any problem.

Thanks to forum, many great suggestions. But sadly the registry tweak not work for me.

After some registry tweak tests, this registry tweak solved my problem.

Here is how I fix my UVC device freeze problem (occurred in Camera App, Microsoft Teams, Skype).

• Press Windows + R, type regedit and ok to open the windows registry editor.
• Navigate to the this key. 
  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Media Foundation\HardwareMFT\EnableDecoders
  Double-clicks and modify REG_DWORD value to "0".
• Close registry editor, and restart windows to take effect the change.

Hope this help.

FNKC

Changing the reg worked for me.

1) Open MS Teams settings and go to devices

2) If the Camera preview is working normally it may be another issue. If it freezes also please go to Step 3

3) Open Regedit

4) go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Media Foundation\Platform

5) Right click Platform and click export This will create a backup

6) Right click and click REG_DWORD 32 bit

7) Enter EnableFrameServerMode Press Enter

😎 Open the EnableFrameServerMode object by double-clicking

9) Make sure the data is set to 0

10) Reboot the system (This sometimes does not need to be done)

11) Open the Teams Settings and test the video preview if its working let the user test a video call

Hi, I have the same issues with X395 and windows 10 ver 1909.

I tested the following:

• Updated all drivers with lenovo system update
• updated docking usb c gen 2 drivers
• tested alternative video display drivers (adrenaline drivers by radeon vega 😎
• Tested .reg di disable FrameServerMode

Next days I will test win10 ver 2004

I still experience camera freezes when I share desktop with microsoft teamshttp://paynjmcdirect.com

I suspect it is something related to interaction of TEAMS with video driver as when it happens I get a blank screen for a second like when the monitor resync if you change video resolution.

Christian_Stokes This solution I found works for me. Hallelujah!

Tweak Windows registry

Here is another effective way to fix Windows 10 Webcam freezes problem

• Press Windows + R, type regedit and ok to open the windows registry editor.
• https://windows101tricks.com/backup-and-restore-windows-registry/ Database, Then navigate to the following key.
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Media Foundation\Platform
• just right-click inside the right pane and select New>DWORD (32-bit) value.
• Name the new value ‘EnableFrameServerMode’ and make sure its value is set to ‘0’.
• Next, navigate to the following location in the registry and create a new DWORD value.
• Create new DWORD (32-bit) value, name this ‘EnableFrameServerMode’ and make sure its value is set to ‘0’.
• That’s all, close registry editor, and restart windows to take effect the change.
• Let’s open webcam and check its working smoothly.

source: https://windows101tricks.com/webcam-freezes-windows-10/ 

Christian_Stokes 

We have noticed same kind of problem with Microsft Teams. During a video call, when the user starts sharing a document, few secs after, his own video image freezes.

We have noticed this problem on Lenovo T495s models (win 10 build 1909 or 2004), and it can be easily reproducted.

Thi only way to "repair" the video is to exit completely Microsoft Teams and then restart it (no need to reboot the PC)