Back Camera Android - Device Camera

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class DeviceCamera : MonoBehaviour
{
    bool camAvailable;
    WebCamTexture backCam;
    Texture defaulBackground;

    public RawImage background;
    public AspectRatioFitter fit;

    private void Start()
    {
        defaulBackground = background.texture;
        WebCamDevice[] devices = WebCamTexture.devices;

        if (devices.Length == 0)
        {
            camAvailable = false;
            return;
        }

        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("enabled to find camera");
        }

        backCam.Play();

        background.texture = backCam;

        camAvailable = true;
    }

    private void Update()
    {
        if (!camAvailable)
            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);
    }
}