Unity 调用PC端多个摄像头拍照保存

本类的功能是调用一台电脑上的多个摄像头，显示在UI上，并可以保存到本地

1.打开摄像头，并将摄像机里的内容显示到图片上

 public IEnumerator TurnOnAllCamera(RawImage[] rayImages){yield return Application.RequestUserAuthorization(UserAuthorization.WebCam);//授权  if (Application.HasUserAuthorization(UserAuthorization.WebCam)){WebCamDevice[] devices = WebCamTexture.devices;Debug.Log("有 " + devices.Length + " 个摄像机");for (int i = 0; i < devices.Length; i++){if (devices != null){deviceName[i] = devices[i].name;//设置摄像机摄像的区域  tex[i] = new WebCamTexture(deviceName[i], 400, 400, 30);tex[i].Play();//开始摄像 rayImages[i].texture = tex[i];textures[i] = tex[i];Debug.Log("宽：" + rayImages[i].texture.width + " 高： " + rayImages[i].texture.height);}}}}

rawImages为显示摄像机内容的组件，调用时赋值即可

2.拍照并保存

public void StartPhotograph(int id,string iconName){tex[id-1].Pause();SaveTextureToFile(TextureToTexture2D(textures[id-1]), iconName+id.ToString()  + ".png");}

功能实现：保存Texture

/// <summary>/// 保存Texture/// </summary>/// <param name="texture2D">要保存的图片</param>/// <param name="fileName">保存的图片的名称</param>void SaveTextureToFile(Texture2D texture2D, string fileName){var bytes = texture2D.EncodeToPNG();//Application.dataPath//Application.persistentDataPathJudgementOrCreate("/Icons");var file = File.Open(Application.persistentDataPath +"/Icons"+ "/" + fileName, FileMode.Create);//Debug.Log(Application.dataPath + "/" + fileName);var binary = new BinaryWriter(file);binary.Write(bytes);file.Close();}

创建保存图片的文件夹

/// <summary>/// 判断是否有存储头像文件夹，如果没有，创建一个空文档。本机地址，相对路径。/// </summary>void JudgementOrCreate(string path){if (!Directory.Exists(Application.persistentDataPath + path)){Debug.Log(Application.persistentDataPath);Directory.CreateDirectory(Application.persistentDataPath + path);print("文件夹不存在,创建");}}

将Texture转成Texture2D 

 private Texture2D TextureToTexture2D(Texture texture){//Texture2D texture2D = new Texture2D(texture.width, texture.height, TextureFormat.RGBA32, false);Texture2D texture2D = new Texture2D(300, 300, TextureFormat.RGBA32, false);RenderTexture currentRT = RenderTexture.active;//RenderTexture renderTexture = RenderTexture.GetTemporary(texture.width, texture.height, 32);RenderTexture renderTexture = RenderTexture.GetTemporary(300, 300, 32);Graphics.Blit(texture, renderTexture);RenderTexture.active = renderTexture;//texture2D.ReadPixels(new Rect(0, 0, renderTexture.width, renderTexture.height), 0, 0);texture2D.ReadPixels(new Rect(0, 0, 300, 300), 0, 0);texture2D.Apply();RenderTexture.active = currentRT;RenderTexture.ReleaseTemporary(renderTexture);return texture2D;}

以上就是完整的调用摄像机拍照保存的全部代码

摄像机不用的时候记得关闭哦

 //关闭摄像机public void StopCamera(){for(int i = 0; i < tex.Length; i++){tex[i].Stop();}}