Unity实现摄像头录像功能

前言

在之前的很多展馆展示的项目中，甲方有很多要求实现用摄像头录像的功能。使用Unity实现调用USB摄像头画面的功能非常容易实现，但是实现录屏的功能有一些困难，我使用了几种方法都没有实现出想要的效果，后来我在网上找到一款叫做AVProMovieCapture的插件，实现了录屏的良好效果，同时也实现了使用Unity实现摄像头录像的效果，具体实现方法如下所示：

实现步骤

1.在项目中导入AVProMovieCapture插件，如下图所示：

2.在场景中新建plane物体，设置如下图所示：
3.在场景中拖入ScreenGameObject物体，如下图所示：

4.在场景中新建WebCapture物体，在该物体上挂载WebCapture.cs脚本，脚本代码如下图所示：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;namespace RenderHeads.Media.AVProMovieCapture.Demos
{public class WebCapture : MonoBehaviour{private class Instance{public string name;public WebCamTexture texture;public CaptureFromTexture capture;public CaptureGUI gui;}[SerializeField]private GUISkin _skin;//[SerializeField]//private GameObject _prefab;[SerializeField]private int _webcamResolutionWidth = 1920;[SerializeField]private int _webcamResolutionHeight = 1080;[SerializeField]private int _webcamFrameRate = 30;//Stateprivate Instance[] _instances;private int _selectedWebcamIndex;//显示视频的面板public MeshRenderer plane;//调用录像的脚本物体public CaptureGUI captureObject;private void Start(){//Create instance data per webcamint numCams = WebCamTexture.devices.Length;_instances = new Instance[numCams];for (int i = 0;i < numCams;i++){//GameObject go = (GameObject)GameObject.Instantiate(_prefab);Instance instance = new Instance();instance.name = WebCamTexture.devices[i].name;//instance.capture = go.GetComponent();instance.capture = captureObject.gameObject.GetComponent();instance.capture._autoFilenamePrefix = "Demo4Webcam-" + i;//instance.gui = go.GetComponent();instance.gui = captureObject.gameObject.GetComponent();instance.gui._showUI = true;_instances[i] = instance;}if (numCams > 0){Change(0);}StartCoroutine(OpenCamera());//captureObject = GameObject.Find("ScreenGameObject(Clone)").GetComponent();}/// 
/// 开启摄像头/// 
/// IEnumerator OpenCamera(){yield return new WaitForSeconds(0.5f);beginCamera();yield return new WaitForSeconds(0.5f);captureObject.ToStartCapture();}private void StartWebcam(Instance instance){instance.texture = new WebCamTexture(instance.name,_webcamResolutionWidth,_webcamResolutionHeight,_webcamFrameRate);instance.texture.Play();if (instance.texture.isPlaying){instance.capture.SetSourceTexture(instance.texture);plane.material.mainTexture = instance.texture;}else{StopWebcam(instance);}}private void StopWebcam(Instance instance){if (instance.texture != null){if (instance.capture != null && instance.capture.IsCapturing()){instance.capture.SetSourceTexture(null);instance.capture.StopCapture();}instance.texture.Stop();Destroy(instance.texture);instance.texture = null;}}private void OnDestroy(){for (int i = 0;i < _instances.Length;i++){StopWebcam(_instances[i]);}}private void Change(int index){_selectedWebcamIndex = index;for (int j = 0;j < _instances.Length;j++){_instances[j].gui._showUI = (j == _selectedWebcamIndex);}}/// 
/// 开启摄像头/// 
public void beginCamera(){for (int i = 0;i<_instances.Length;i++){Instance webcam = _instances[i];StartWebcam(webcam);}}}
}

5.运行场景，发现已经调用了摄像头，如下图所示：

6.虽然调用了摄像头，但是不知道是否已经进行了录像，查找到工程下的movie文件夹，发现已经录入了视频，从而实现了使用usb摄像头录像的功能，如下图所示：

7.实现录像功能，有的需求还需要获取到这些视频并且展示出来，这个也在我之前的项目实现了，具体怎么实现不再赘述了，在这里将核心代码分享在这里：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.IO;public class Load : MonoBehaviour
{public List filePaths;public static string[][] pic;private List LAN;private string movieUrl;//遍历的视频数量public static int movieNumber = 0;private void Start(){movieUrl = ConfigTest.dic["录像路径"]["url"];LAN = new List();LAN.Add(movieUrl);pic = new string[LAN.Count][];Debug.Log(pic.Length);LoadIma();}void LoadIma(){for (int i = 0;i < pic.Length;i++){pic[i] = (load(LAN[i],i));}}string[] load(string LAN,int t){filePaths = new List();string imgtype = "*.mp4|*.mov|*.avi";string[] ImageType = imgtype.Split('|');for (int i = 0;i < ImageType.Length;i++){//获取所有视频视频的路径string[] dirs = Directory.GetFiles(@"" + LAN,ImageType[i]);//Debug.Log(dirs.Length);//movieNumber = dirs.Length;for (int j = 0;j < dirs.Length;j++){filePaths.Add(dirs[j]);movieNumber = j;//Debug.Log(movieNumber);}}return fuzhi(t);}public string[] fuzhi(int t){pic[t] = new string[filePaths.Count];for (int i = 0; i < filePaths.Count;i++){pic[t][i] = filePaths[i];}return pic[t];}
}

结尾语

网上开发的各种大神有很多，他们开发出许许多多的插件供我们使用，极大节省了我们的开发时间，在这里向他们表示感谢。我作为一名Unity小菜鸟，希望和大家有问题一起讨论，共同进步，大家有问题可以私聊我。