unity调用摄像头

using UnityEngine;
using System.Collections;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Threading;

public class paizhao : MonoBehaviour
{
public string deviceName;
//接收返回的图片数据
WebCamTexture tex;
public Texture2D _tex;

void OnGUI()
{
if (GUI.Button(new Rect(10, 20, 100, 40), "开启摄像头"))
{
// 调用摄像头
StartCoroutine(start());
}

if (GUI.Button(new Rect(10, 70, 100, 40), "捕获照片"))
{
//捕获照片
tex.Pause();
StartCoroutine(getTexture());
}

if (GUI.Button(new Rect(10, 120, 100, 40), "再次捕获"))
{
//重新开始
tex.Play();
}

if (GUI.Button(new Rect(120, 20, 80, 40), "录像"))
{
//录像
StartCoroutine(SeriousPhotoes());
}

if (GUI.Button(new Rect(10, 170, 100, 40), "停止"))
{
//停止捕获镜头
tex.Stop();
StopAllCoroutines();
}

if (tex != null)
{
// 捕获截图大小               —距X左屏距离   |   距Y上屏距离
GUI.DrawTexture(new Rect(Screen.width / 2 - 150, Screen.height / 2 - 190, 280, 200), tex);
}

}

/// <summary>
/// 捕获窗口位置
/// </summary>
public IEnumerator start()
{
yield return Application.RequestUserAuthorization(UserAuthorization.WebCam);
if (Application.HasUserAuthorization(UserAuthorization.WebCam))
{
WebCamDevice[] devices = WebCamTexture.devices;
deviceName = devices[0].name;
tex = new WebCamTexture(deviceName, 300, 300, 12);
tex.Play();
}
}

/// <summary>
/// 获取截图
/// </summary>
/// <returns>The texture.</returns>
public IEnumerator getTexture()
{
yield return new WaitForEndOfFrame();
Texture2D t = new Texture2D(400, 300);
t.ReadPixels(new Rect(Screen.width / 2 - 200, Screen.height / 2 - 50, 360, 300), 0, 0, false);
//距X左的距离        距Y屏上的距离
// t.ReadPixels(new Rect(220, 180, 200, 180), 0, 0, false);
t.Apply();
byte[] byt = t.EncodeToPNG();
//      File.WriteAllBytes(Application.dataPath+"/Photoes/"+Time.time+".jpg",byt);
tex.Play();
}

/// <summary>
/// 连续捕获照片
/// </summary>
/// <returns>The photoes.</returns>
public IEnumerator SeriousPhotoes()
{
while (true)
{
yield return new WaitForEndOfFrame();
Texture2D t = new Texture2D(400, 300, TextureFormat.RGB24, true);
t.ReadPixels(new Rect(Screen.width / 2 - 180, Screen.height / 2 - 50, 360, 300), 0, 0, false);
t.Apply();
print(t);
byte[] byt = t.EncodeToPNG();
//          File.WriteAllBytes(Application.dataPath + "/MulPhotoes/" + Time.time.ToString().Split('.')[0] + "_" + Time.time.ToString().Split('.')[1] + ".png", byt);
Thread.Sleep(300);
}
}
}