从USB 3.0相机UWP中读取数据

Question

我正在使用USB 3.0相机来显示它的预览屏幕。但似乎Windows不承认它是成像设备所以当我尝试打开W​​indows 10的Camera应用程序默认时，它显示错误。 所以我的问题是如何将USB 3.0相机作为我们可以在UWP中使用的成像设备？

Answer 1

不确定我是否正确理解了这个问题。

首先，您应该在应用的清单中启用相机/网络摄像头功能。

然后试试这个：

MediaCapture _mediaCapture = new MediaCapture();

var devices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
DeviceInformation deviceInfo = devices.FirstOrDefault();

if (deviceInfo == null)
    deviceInfo = devices.ElementAtOrDefault(0);

var settings = new MediaCaptureInitializationSettings()
    {
        VideoDeviceId = deviceInfo?.Id,
        PhotoCaptureSource = PhotoCaptureSource.Auto,
        StreamingCaptureMode = StreamingCaptureMode.Video,
    };

if (deviceInfo == null)
    _mediaCapture = null;

if (_mediaCapture != null)
    {
        await _mediaCapture.InitializeAsync(settings);
        await _mediaCapture.StartPreviewAsync();
    }

修改

如果它不起作用且devices不包含您需要的相机，您应该尝试通过设备ID / guid手动找到您的设备：

// by (vendorid, deviceid)
string aqs = Windows.Devices.Usb.UsbDevice.GetDeviceSelector(0x1234, 0xabcd);
// or by device GUID
string aqs = Windows.Devices.Usb.UsbDevice.GetDeviceSelector(new Guid("camera guid"));

当你得到aqs时：

var myDevices = await DeviceInformation.FindAllAsync(aqs);
UsbDevice usbDevice = await Windows.Devices.Usb.UsbDevice.FromIdAsync(myDevices[0].Id);

// or try init MediaCaptureInitializationSettings
var settings = new MediaCaptureInitializationSettings()
{
    VideoDeviceId = myDevices.FirstOrDefault()?.Id,
    PhotoCaptureSource = PhotoCaptureSource.Auto,
    StreamingCaptureMode = StreamingCaptureMode.Video,
};