Obs-studio: Virtual Camera does not work with Cisco Webex

[curya]

Platform

Operating system and version: Windows 10
OBS Studio version: 26 rc2

Expected Behavior

Virtual camera should work.

Current Behavior

Cisco Webex allows you to select OBS Camera, but once you do you get an error. The error states that it cannot connect to the webcam. It asks if the webcam is in use by another application or installed correctly.

Steps to Reproduce

1. Start Virtual Camera in OBS.
2. Select OBS Camera in Cisco Webex.
3. Error.

Additional information

[flaeri]

I can confirm Cisco Webex just displaying a black screen on RC2. The old plugin seems to work.

[Fenrirthviti]

We checked in to this, but are not sure exactly what the issue is. It will take some more investigation, but we are not going to hold up the release for this. Moving this to 26.1 milestone for now.

[WizardCM]

Per feedback in the beta-testing channel on Discord, it seems Korean chat app KakaoTalk also has the same issue - it just shows black, regardless of whether the placeholder image is active or the camera has been launched. I have verified this myself.

[Fenrirthviti]

We have engaged with Cisco to determine what the issue is, and will update as soon as we have more to share.

[rafaelugim]

My OBS version is 25.0.8 and Webex updated at 24/10/2020.
I had the same problem, but i think it resolvs easily reinstalling the webex app.

[Fenrirthviti]

OBS v25 doesn't have a built-in virtual camera, so I am unsure that is related to this issue.

[scls19fr]

I also noticed that virtual cam doesn't work with desktop client Webex Meetings, but works properly with Cisco webex web client.

[stozk]

Same problem here, 26.0.2 doesn't work with the Webex Desktop Client (40.8.4.7 / Windows 10).
It works in MS Teams and other applications without problems.

I can select it in the Webex app, but when I press on "start video" nothing happens.

[FujitsuSSL-LiveTalk]

This issue only occurs with WebEx Apps.
If you use WebEx WebApps, you can use the footage from OBS Virtual Cam as camera footage.
OBS Studio 26.0.2

[Fenrirthviti]

That is expected, because browser-based tools will use the browser's camera interface (I.e. chrome's) which works fine with VirtualCam.