Using OBS Studio as webcam

So whats the trick to getting OBS studio working as webcam?

I installed the VirtualCam plugin for OBS Studio.

When I run OBS Studio I can see the webcam preview.
I open the "VirtualCam" plugin popup inside OBS studio and click Start.

I am using "OBS-Camera" as my Device name inside Unity .

But the webcam does NOT render inside Unity.
If instead I simply used "Integrated Webcam" as my device name i correctly see the built in webcam being rendered.

complete code

Code (CSharp):

1.  using UnityEngine;
2. using System.Collections;
3. public class WebcamTest : MonoBehaviour {
4.    public string deviceName;
5.  
6.     public Renderer webCamCanvas;
7.    WebCamTexture _wct;
8.      WebCamDevice[] _devices;
9.  
10.  
11.    // Use this for initialization
12.    void Start () {
13.       _devices = WebCamTexture.devices;
14.  
15.      //deviceName = _devices[0].name;
16.      _wct = new WebCamTexture("OBS-Camera", 400, 300, 12);
17.  
18.  
19.      webCamCanvas.material.mainTexture = _wct;
20.    
21.  
22.        // CheckDeviceNames();
23.         _wct.Play();
24.          if (_devices.Length > 0)
25.          {
26.             Debug.Log("Number webcams is "+_devices.Length);
27.              foreach (WebCamDevice wcd in _devices)
28.              {
29.                  Debug.Log(wcd.name);
30.               }
31.          }
32.    }
33.  
34.  
35.  
36.    // For photo varibles
37.  
38.    public Texture2D heightmap;
39.    public Vector3 size = new Vector3(100, 10, 100);
40.  
41.  
42.    void OnGUI() {    
43.      if (GUI.Button(new Rect(10, 70, 50, 30), "Click"))
44.        TakeSnapshot();
45.    
46.    }
47.  
48.    // For saving to the _savepath
49.    private string _SavePath = "C:/WebcamSnaps/"; //Change the path here!
50.    int _CaptureCounter = 0;
51.    void TakeSnapshot()
52.      {
53.        Texture2D snap = new Texture2D(_wct.width, _wct.height);
54.        snap.SetPixels(_wct.GetPixels());
55.        snap.Apply();
56.        System.IO.File.WriteAllBytes(_SavePath + _CaptureCounter.ToString() + ".png", snap.EncodeToPNG());
57.        ++_CaptureCounter;
58.    }
59. }

 

Hi, I have encountered the same problem. Did you found the solution? Please let me know if you have found out

 

You have to register a "dummy" camera into the Windows registry, otherwise you'll just get black screens. There is a "reg_path.reg" registry file in the GitHub page of the Virtual Camera: https://github.com/CatxFish/obs-virtual-cam/releases/tag/1.2.1

There was also a thread on Reddit about it here: https://www.reddit.com/r/Unity3D/comments/79k05g/what_is_required_to_use_a_virtual_webcam_as/

 

Hey, Kirbyderby2000 I am also trying to use obs virtual camera. I have installed and ran reg_path but no luck. Any ideas how I (or anyone) else can get around this?

 

Problem

Using OBS 27, I had OBS virtual camera working in Google Chrome but not in Unity 2020.3.

UnityEngine.WebCamTexture was throwing this error:

ERROR - Could not find specified video device

Using the OBS-Virtual-Camera reg_path.reg key did not solve the issue.

(I’m not sure why I started having this error, because it worked fine for me without this registry key a few months ago / last year… it might be related to upgrading OBS or maybe something changed on my PC.)


Workaround solution

I reverted to an older version (to a version before the virtual camera was a built-in OBS feature) and installed:

• OBS 25.0.8
  
  
• OBS Virtualcam 2.0.5
  
  
• reg_path.reg from OBS-VirtualCam 1.2.1

From this OBS Virtualcam 2.0.5 plugin overview page, note this known issue:

"Unity can't get image from virtualcam, please use register batch (reg_path.reg) in release page to manually add dummy device path .(note: The registry conflict with skype desktop , you can use unreg_path.reg to remove it)"​

 

Not being able to use OBS virtual camera directly with the WebCamTexture is a reproducible bug in Unity. I submitted a report so hopefully it will be fixed at some point. In the meantime, please vote for the issue here

https://issuetracker.unity3d.com/is...n-using-webcamtexture-with-obs-virtual-camera

 

This is now fixed since 2021.3.14f1, 2022.1.23f1, 2022.2.0b15, 2023.1.0a14