Windows 8如何选择要初始化的摄像头 [英] Windows 8 how to choose which camera to initialize

问题描述

我正在开发 Windows商店应用程式，我正在使用相机和麦克风功能。我想要的后置摄像头被初始化，但我发现的例子总是初始化前置摄像头。这里是我有的代码：

I am developing a Windows Store App and I am using the Camera and Microphone capabilities. I would like the back camera to be initialized but the examples that I have found always initialize the front camera. Here's the code that I have:

Windows.Devices.Enumeration.DeviceInformation.findAllAsync(Windows.Devices.Enumeration.DeviceClass.videoCapture)
    .done(function (devices) {
        if (devices.length > 0) {
            // Using Windows.Media.Capture.MediaCapture APIs to stream from webcam 
            mediaCaptureMgr = new Windows.Media.Capture.MediaCapture();
            mediaCaptureMgr.initializeAsync().done(initializeComplete, initializeError);
        } else {
            var div = document.createElement('div');
            div.innerHTML = "No Camera found";
            document.body.appendChild(div);
        }
    });

在这种情况下， mediaCaptureMgr 相机。我经历了文档，它说，我已经提供 videoDeviceId 到 MediaCapture（）函数像这样： / p>

In this case mediaCaptureMgr refers to the front camera. I went through the documentation and it says that I have provide a videoDeviceId to the MediaCapture() function like this:

mediaCaptureMgr = new Windows.Media.Capture.MediaCapture({
    videoDeviceId: devices[1].id
});

但是前置摄像头仍会初始化。我在Surface上编写和测试这个。

However still the front camera is initialized. I am writing and testing this on a Surface. Could you help me with this?

推荐答案

您必须创建一个 MediaCaptureInitializationSettings object： p>

You have to create a MediaCaptureInitializationSettings object:

var settings = new Windows.Media.Capture.MediaCaptureInitializationSettings();
settings.videoDeviceId = devices[1].id;
mediaCaptureMgr.initializeAsync(settings).done(initializeComplete, initializeError);

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