http://www.itnose.net/detail/6259004.html

一:Unity 中使用WebCamTexture 调用摄像头实现拍照和摄像。

using UnityEngine;

using System.Collections;

using System.IO;

using System.Runtime.Serialization;

using System.Runtime .Serialization.Formatters.Binary;

using System.Threading;

public class takePhoto : 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);

		}

	}

}

二:Unity 中使用WebCamTexture 设置背景为摄像头画面

1在unity的场景中新建一个Quad作为背景，可以自行调节缩放和位置。

using UnityEngine;

using System.Collections;

public class WebCam : MonoBehaviour {

    public string deviceName;

    WebCamTexture tex;

        // Use this for initialization

        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, 400, 300, 12);

            renderer.material.mainTexture = tex;

            tex.Play();

        }

    }

}