Windows Phone 8.1摄像头初始化

本文关键字：摄像头 初始化 Phone Windows | 更新日期: 2023-09-27 18:21:49

我知道有更多关于这方面的重复问题，但请注意，这对我来说非常重要。我现在很难进行Windows Phone 8.1 C#相机初始化。

async private void InitCamera_Click(object sender, RoutedEventArgs e)
    {
        captureManager = new MediaCapture();
        await captureManager.InitializeAsync();
         try 
        {
            captureManager = new Windows.Media.Capture.MediaCapture();
            await captureManager.InitializeAsync();
            if (captureManager.MediaCaptureSettings.VideoDeviceId != "" && captureManager.MediaCaptureSettings.AudioDeviceId != "") 
            {
                System.Diagnostics.Debug.WriteLine("Init successful");

                captureManager.RecordLimitationExceeded += new Windows.Media.Capture.RecordLimitationExceededEventHandler(RecordLimitationExceeded);
                captureManager.Failed += new Windows.Media.Capture.MediaCaptureFailedEventHandler(Failed); 
            } 
            else 
            {
                System.Diagnostics.Debug.WriteLine("No Device");
            } 
        }
         catch (Exception exception)
         {
             System.Diagnostics.Debug.WriteLine("Exception raised!!!!:" + exception);
         } 
    }

这是我初始化相机的代码，但由于某种原因，它在Lumia 920上用System.UnauthorizedAccessException调用Windows.Media.Capture.MediaCapture()构造函数时失败，在模拟器上也失败了访问违规。我在谷歌上搜索过这个问题，但到目前为止还没有答案。有些人告诉我，我不仅应该启用网络摄像头，还应该启用麦克风，但这并没有解决我的问题。一切似乎都设置得很好，所有访问权限都在应用程序清单中授予。我还想问你，如果你有一些用相机拍照的好例子/教程，请提供。

Windows Phone 8.1摄像头初始化

下面是我的相机捕捉代码，它可以工作，我在商店里有一个提交的应用程序：

private MediaCapture mediaCapture = null;
private async Task StartCapture()
{
  string error = null;
  try
  {
    if (mediaCapture == null)
    {
      mediaCapture = new MediaCapture();
      mediaCapture.Failed += mediaCapture_Failed;
      var _deviceInformation = await GetCameraDeviceInfoAsync(Windows.Devices.Enumeration.Panel.Back);
      var settings = new MediaCaptureInitializationSettings();
      settings.StreamingCaptureMode = StreamingCaptureMode.Video;
      settings.PhotoCaptureSource = PhotoCaptureSource.VideoPreview;
      settings.AudioDeviceId = "";
      if (_deviceInformation != null)
          settings.VideoDeviceId = _deviceInformation.Id;
      await mediaCapture.InitializeAsync(settings);
      var focusSettings = new FocusSettings();
      focusSettings.AutoFocusRange = AutoFocusRange.FullRange;
      focusSettings.Mode = FocusMode.Auto;
      focusSettings.WaitForFocus = true;
      focusSettings.DisableDriverFallback = false;
      mediaCapture.VideoDeviceController.FocusControl.Configure(focusSettings);
      await mediaCapture.VideoDeviceController.ExposureControl.SetAutoAsync(true);
      mediaCapture.SetPreviewRotation(VideoRotation.Clockwise90Degrees);
      mediaCapture.SetRecordRotation(VideoRotation.Clockwise90Degrees);
    }
    captureReceipt.Source = mediaCapture;
    await mediaCapture.StartPreviewAsync();
  }
  catch (Exception ex)
  {
    DisposeMediaCapture();
    error = ex.Message;
  }
  if (error != null)
  {
    await (new MessageBoxImpl()).ShowMessageAsync(error);
  }
}
private static async Task<DeviceInformation> GetCameraDeviceInfoAsync(Windows.Devices.Enumeration.Panel desiredPanel)
{
  DeviceInformation device = (await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture))
      .FirstOrDefault(d => d.EnclosureLocation != null && d.EnclosureLocation.Panel == desiredPanel);
  if (device == null)
  {
    throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "No suitable devices found for the camera of type {0}.", desiredPanel));
  }
  return device;
}
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