"WebCamTexture.Play()" doesn't excute multiple times

I declared 2 WebCamTextures (e.g. webCamA, webCamB)

and did Play(); at each textures.

like

webCamA.Play();
webCamB.Play();

and console shows me error below.

these error shows me no hint to solve problem.... I cant figure out what do I do next.

with just 1 Play() function, all okay and work well.

It seems like Unity can handle only 1 Play() funtion at a time.


Is there any way to open 2 webcam stream at a time??
not switch I'm making stereoscopic system...

ps. this is my script attatched to 2 quads. (Cam number 0 is for Vive VR)

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5.  
6. public class EndoCam_Script : MonoBehaviour
7. {
8.     public enum CamIndex { Left, Right }
9.     public CamIndex EndoCamSource;
10.     public bool EndoCamON = false;
11.  
12.     void Update()
13.     {
14.         if (Input.GetKeyDown(KeyCode.Space)) EndoCamON = !EndoCamON;
15.  
16.         if (EndoCamON)
17.         {
18.             GetComponent<Renderer>().enabled = true;
19.             //Debug.Log("EndoCam ON!");
20.         }
21.         else
22.         {
23.             GetComponent<Renderer>().enabled = false;
24.             //Debug.Log("EndoCam OFF!");
25.         }
26.     }
27.  
28.     void Start()
29.     {
30.         WebCamDevice[] Connected_Camera_devices = WebCamTexture.devices;
31.  
32.         for (int i = 0; i < Connected_Camera_devices.Length; i++)
33.             Debug.Log(Connected_Camera_devices[i].name + " // Camera number : " + i);
34.  
35.  
36.         if (EndoCamSource == CamIndex.Left)
37.         {
38.             WebCamTexture endoCamTextureL = new WebCamTexture();
39.             endoCamTextureL.deviceName = Connected_Camera_devices[1].name;
40.             Debug.Log("Left Cam ON : " + endoCamTexture.deviceName + "\n");
41.             GetComponent<Renderer>().material.mainTexture = endoCamTexture;
42.             endoCamTextureL.Play();
43.         }
44.         else
45.         {
46.             WebCamTexture endoCamTextureR = new WebCamTexture();
47.             endoCamTextureR.deviceName = Connected_Camera_devices[2].name;
48.             Debug.Log("Right Cam ON : " + endoCamTexture.deviceName + "\n");
49.             GetComponent<Renderer>().material.mainTexture = endoCamTexture;
50.             endoCamTextureR.Play();
51.         }
52.     }
53. }
54.  

 

Line 40, 41 - endoCamTexture -> endoCamTextureL
Line 48, 49 - endoCamTexture -> endoCamTextureR

I cant edit more, system detects editting is spam-like..

 

Solved.

Using 2 cams on same usb hub is a problem.

Unity seems like cant seperate devices on same hub.

Dont use usb hub...