| private StartPreviewToCustomSinkAsync ( [ encodingProfile, [ customMediaSink ) : IAsyncAction | ||
| encodingProfile | [ | |
| customMediaSink | [ | |
| return | IAsyncAction | |
public async void StartPreview()
{
var devices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
var deviceInfo = devices[0]; //grab first result
DeviceInformation rearCamera = null;
foreach (var device in devices)
{
if (device.Name.ToLowerInvariant().Contains("front"))
{
DeviceInformation frontCamera;
deviceInfo = frontCamera = device;
var hasFrontCamera = true;
}
if (device.Name.ToLowerInvariant().Contains("back"))
{
rearCamera = device;
}
}
var mediaSettings = new MediaCaptureInitializationSettings
{
MediaCategory = MediaCategory.Communications,
StreamingCaptureMode = StreamingCaptureMode.AudioAndVideo,
VideoDeviceId = rearCamera.Id
};
var mediaCaptureManager = new Windows.Media.Capture.MediaCapture();
await mediaCaptureManager.InitializeAsync(mediaSettings);
var previewSink = new Windows.Phone.Media.Capture.MediaCapturePreviewSink();
// List of supported video preview formats to be used by the default preview format selector.
var supportedVideoFormats = new List <string> {
"nv12", "rgb32"
};
// Find the supported preview format
var availableMediaStreamProperties =
mediaCaptureManager.VideoDeviceController.GetAvailableMediaStreamProperties(
Windows.Media.Capture.MediaStreamType.VideoPreview)
.OfType <Windows.Media.MediaProperties.VideoEncodingProperties>()
.Where(p => p != null &&
!String.IsNullOrEmpty(p.Subtype) &&
supportedVideoFormats.Contains(p.Subtype.ToLower()))
.ToList();
var previewFormat = availableMediaStreamProperties.FirstOrDefault();
foreach (var property in availableMediaStreamProperties)
{
if (previewFormat.Width < property.Width)
{
previewFormat = property;
}
}
//previewFormat.Width = 480;
//previewFormat.Height = 480;
// Start Preview stream
await mediaCaptureManager.VideoDeviceController.SetMediaStreamPropertiesAsync(Windows.Media.Capture.MediaStreamType.VideoPreview, previewFormat);
await mediaCaptureManager.StartPreviewToCustomSinkAsync(new Windows.Media.MediaProperties.MediaEncodingProfile {
Video = previewFormat
}, previewSink);
var viewfinderBrush = new VideoBrush {
Stretch = Stretch.Uniform
};
// Set the source of the VideoBrush used for your preview
Microsoft.Devices.CameraVideoBrushExtensions.SetSource(viewfinderBrush, previewSink);
CameraPreview.Background = viewfinderBrush;
mediaCaptureManager.SetPreviewRotation(VideoRotation.Clockwise90Degrees);
}