Windows Phone 8.1相机初始化 - UnAuthorizedException [英] Windows phone 8.1 Camera Initialisation - UnAuthorizedException

问题描述

我在Windows Phone 8.1通用应用程序上尝试使用MediaCapture api启动相机。该代码在Windows 8.1和Windows Phone 8.1模拟器上正常工作。我能够发射相机和拍照。

但它会在Windows Phone 8.1设备上引发UnauthorizedException。类似的问题要求这里

但是，我不知道有人绕过这个问题。我在设备上的侧载应用程序进行测试。

正在初始化MediaCapture：

  DeviceInformation cameraDevice = await GetCameraID（）; 
 if（cameraDevice！= null）
 {
 mMediaManager_ = new Windows.Media.Capture.MediaCapture（）; 
 var settings = new Windows.Media.Capture.MediaCaptureInitializationSettings（）; 
 settings.StreamingCaptureMode = Windows.Media.Capture.StreamingCaptureMode.Video; 
 settings.MediaCategory = Windows.Media.Capture.MediaCategory.Other; 
 settings.AudioProcessing = Windows.Media.AudioProcessing.Default; 
 settings.VideoDeviceId = cameraDevice.Id; 
 
 await mMediaManager_.InitializeAsync（settings）; 
 mMediaManager_.RecordLimitationExceeded + = new Windows.Media.Capture.RecordLimitationExceededEventHandler（RecordLimitationExceeded）; 
 mMediaManager_.Failed + = new Windows.Media.Capture.MediaCaptureFailedEventHandler（RecordFailed）; 
 
} 
  

拍摄照片：

  mMediaStorageFile_ = await folder.CreateFileAsync（fileName，CreationCollisionOption.GenerateUniqueName）; 
 ImageEncodingProperties imageProperties = ImageEncodingProperties.CreateJpeg（）; 
 await mMediaManager_.CapturePhotoToStorageFileAsync（imageProperties，mMediaStorageFile_）; 
 mCameraScreen_.setPreviewImage（mMediaStorageFile_）; 
  

解决方案

似乎这个错误已经更正更新。

由于我在开发者预览版本8.10.14176.243上测试， MediaCapture.InitializeAsync 问题。

I am trying to launch camera using MediaCapture api on my windows phone 8.1 universal app. The code works fine on Windows 8.1 and Windows Phone 8.1 emulator. I am able to launch camera and take picture.

But it throws an UnauthorizedException on Windows Phone 8.1 device. Similar question is asked Here

But, i dont know whether someone got around this problem. And I am sideloading application on device for testing. My requirement is to launch camera on sideloaded applications.

Code snippet:

Initializing MediaCapture:

                DeviceInformation cameraDevice = await GetCameraID();
                if (cameraDevice != null)
                {
                    mMediaManager_ = new Windows.Media.Capture.MediaCapture();
                    var settings = new Windows.Media.Capture.MediaCaptureInitializationSettings();
                    settings.StreamingCaptureMode = Windows.Media.Capture.StreamingCaptureMode.Video;
                    settings.MediaCategory = Windows.Media.Capture.MediaCategory.Other;
                    settings.AudioProcessing = Windows.Media.AudioProcessing.Default;
                    settings.VideoDeviceId = cameraDevice.Id;                       

                    await mMediaManager_.InitializeAsync(settings);
                    mMediaManager_.RecordLimitationExceeded += new Windows.Media.Capture.RecordLimitationExceededEventHandler(RecordLimitationExceeded);
                    mMediaManager_.Failed += new Windows.Media.Capture.MediaCaptureFailedEventHandler(RecordFailed);

                }

Taking Photo:

                mMediaStorageFile_ = await folder.CreateFileAsync(fileName, CreationCollisionOption.GenerateUniqueName);
                ImageEncodingProperties imageProperties = ImageEncodingProperties.CreateJpeg();
                await mMediaManager_.CapturePhotoToStorageFileAsync(imageProperties, mMediaStorageFile_);                   
                mCameraScreen_.setPreviewImage(mMediaStorageFile_);

解决方案

It seems that this bug has been corrected with the last update.

As I've tested on developer preview version 8.10.14176.243, MediaCapture.InitializeAsync should work now without problems.

这篇关于Windows Phone 8.1相机初始化 - UnAuthorizedException的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！