NVIDIA Broadcast Camera is not working properly

Hi ​@JOZENJI Saburo,

Thank you for joining and participating in the community!

This can happen if Windows temporarily blocks Zoom from accessing the camera after a reboot. If you're seeing the “Cannot start video” error and you're using NVIDIA Broadcast as your camera, it’s worth checking Windows’ camera permissions first.

On Windows 11, try this:

1. Right-click Start → Settings
2. Go to Privacy & security → Camera
3. Make sure Camera access is turned On
4. Also make sure Let desktop apps access your camera is enabled
5. Check that Zoom is allowed to access the camera if it appears in the list

Once you've done that, completely quit Zoom (including from the system tray), then open it again.

After restarting Zoom, go to Settings → Video and select NVIDIA Broadcast as your camera again.

If it still doesn't work, I'd also check whether NVIDIA Broadcast itself can access the physical camera. That can help determine whether the issue is with Zoom or with the virtual camera connection.

I hope this helps! Please feel free to reach out again if you need assistance or other Zoom related inquiry.

Thank you all for replying.

Zoom and NVIDIA Broadcast have been properly allowed access to the physycal camera.

NVIDIA Broadcast can access the physical camera without any issues, and Zoom can access the physical camera directly. Only access via NVIDIA Broadcast results in an error.

I think the issue Steven pointed out is probably the same as mine.

This issue appears to be caused by Zoom's inability to properly handle virtual camera devices.

Hi,
 

The additional testing makes it pretty clear that the physical camera and Windows permissions are not the issue. Since both NVIDIA Broadcast and OBS virtual cameras work in other applications, while Zoom can still use the physical camera directly, the failure seems isolated to how the Zoom desktop client handles virtual camera devices.

At this point, I would compare the behavior with a clean Zoom installation and, if it fails again after a reboot, collect the Zoom application logs before reinstalling. That should give Zoom support something concrete to investigate instead of repeatedly reinstalling the client, especially since the reinstall only provides a temporary fix.

I reported the issue by following the steps below.

1. Open Zoom
2. Settings → Statistics
3. Report problem

Is this the right thing for me to do first?

I’m having the exact same issue, it has worked fine for months, but recently I’ve been getting the same error.

Thanks for this thread. I also added a report.

Thanks for the question.

If the resolution selected in Zoom does not match the resolution configured in NVIDIA Broadcast, the video may fail to start.

Could you please check NVIDIA Broadcast → Video and confirm the current resolution and frame rate (for example, 1920 × 1080 @ 30 FPS)?

Once we have this information, we can provide the appropriate configuration to make Zoom use the same resolution and avoid the video startup issue.

It’s nice that you send one of us an email with instructions, but what’s with the the rest of us? Several people have this problem it’s clearly got nothing do to with resolutions. Some already suggested that it might be a general compatibility problem with virtual cameras and it seems that it wasn’t a problem in previous zoom versions. Maybe that’s what you should look into?