WebCamTexture problem

I am not sure if my answer will work, but this is finest solution that could help you out for camera rotation angle.

(Below code is not created by me, I have followed tutorial on YouTube to get working camera for my devices and changed some part of code as required by me).

Steps to use:

1) Add RawImage UI gameobject in your scene. (set it's pivot to stretch to fill screen width and height).

2) Add AspectRatioFitter script on this object.

3) Attach following script to any other gameobject you like.

4) Add appropriate component reference to your CameraManager script objects.

 private bool isCamAvailable;
 private WebCamTexture backCam;
 private Texture defaultBackground;

 public RawImage background;
 public AspectRatioFitter fit;

 private void Start()
 {
     StartCoroutine("CheckAuthentication");
 }

 private void Update()
 {
     if (!isCamAvailable)
         return;

     float ratio = (float)backCam.width / (float)backCam.height;
     fit.aspectRatio = ratio;

     float scaleY = backCam.videoVerticallyMirrored ? -1f : 1f;
     background.rectTransform.localScale = new Vector3(1f, scaleY, 1f);

     int orient = -backCam.videoRotationAngle;
     background.rectTransform.localEulerAngles = new Vector3(0, 0, orient);
 }

 IEnumerator CheckAuthentication() {
     yield return Application.RequestUserAuthorization(UserAuthorization.WebCam);
     if (Application.HasUserAuthorization(UserAuthorization.WebCam)) {
         defaultBackground = background.texture;
         WebCamDevice[] devices = WebCamTexture.devices;

         if (devices.Length == 0)
         {
             Debug.Log("No camera detected");
             isCamAvailable = false;
         }
         else
         {
             for (int i = 0; i < devices.Length; i++)
             {
                 if (!devices[i].isFrontFacing)
                 {
                     backCam = new WebCamTexture(devices[i].name, Screen.width, Screen.height);
                 }
             }

             if (backCam == null)
             {
                 Debug.Log("No back cam found!!");
                 backCam = new WebCamTexture(devices[0].name, Screen.width, Screen.height);
                 //return;
             }

             backCam.Play();
             background.texture = backCam;

             isCamAvailable = true;
         }
     }
 }

}

vote up if you like my answer. Happy coding..