Windows Phone 8.1相机初始化

本文介绍了Windows Phone 8.1相机初始化 - UnAuthorizedException的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 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.