/// <summary>
/// Initializes the scenario
/// </summary>
/// <returns></returns>
private async Task InitializeAsync(CancellationToken cancel = default(CancellationToken))
{
var streamFilteringCriteria = new
{
//AspectRatio = 1.333333333333333,
HorizontalResolution = (uint)480,
SubType = "YUY2"
};
currentState = State.Initializing;
device = new CaptureDevice();
CameraPreview.Visibility = Visibility.Collapsed;
PreviewPoster.Visibility = Visibility.Visible;
Preview.Content = "Start Preview";
LoopbackClient.IsEnabled = false;
mode = defaultMode;
LatencyModeToggle.IsOn = (mode == LatencyMode.LowLatency);
LatencyModeToggle.IsEnabled = false;
await device.InitializeAsync();
var setting = await device.SelectPreferredCameraStreamSettingAsync(MediaStreamType.VideoPreview, ((x) =>
{
var previewStreamEncodingProperty = x as Windows.Media.MediaProperties.VideoEncodingProperties;
return(previewStreamEncodingProperty.Width >= streamFilteringCriteria.HorizontalResolution &&
previewStreamEncodingProperty.Subtype == streamFilteringCriteria.SubType);
}));
previewEncodingProperties = setting as VideoEncodingProperties;
PreviewSetupCompleted();
}
private async Task startVideoRecord(CancellationToken cancel = default(CancellationToken))
{
NotifyUser("Initializing...", NotifyType.StatusMessage);
var recordFormat = _validVideoRecordProperties[SupportedFormat.SelectedIndex];
try
{
var rSetting = await device.SelectPreferredCameraStreamSettingAsync(MediaStreamType.VideoRecord, ((x) =>
{
var p = x as VideoEncodingProperties;
return(p.Width == recordFormat.Width && p.Height == recordFormat.Height && p.Subtype == recordFormat.Subtype);
}));
recordEncodingProperties = rSetting as VideoEncodingProperties;
var pSetting = await device.SelectPreferredCameraStreamSettingAsync(MediaStreamType.VideoPreview, ((x) =>
{
var p = x as VideoEncodingProperties;
return(p.Width == recordFormat.Width && p.Height == recordFormat.Height);
}));
if (pSetting == null)
{
pSetting = await device.SelectPreferredCameraStreamSettingAsync(MediaStreamType.VideoPreview, ((x) =>
{
var p = x as VideoEncodingProperties;
return(p.Width <= recordFormat.Width);
}));
}
previewEncodingProperties = pSetting as VideoEncodingProperties;
await StartRecordToCustomSink();
NotifyUser("", NotifyType.StatusMessage);
}
catch (Exception)
{
NotifyUser("Initialization error. Restart the sample to try again.", NotifyType.ErrorMessage);
}
}
/// <summarycancel
/// Initializes the scenario
/// </summary>
/// <returns></returns>
private async Task InitializeAsync()
{
var streamFilteringCriteria = new
{
HorizontalResolution = (uint)480,
SubType = "YUY2"
};
currentState = State.Initializing;
device = new CaptureDevice();
PreviewVideo.Visibility = Visibility.Collapsed;
WebcamPreviewPoster.Visibility = Visibility.Visible;
PreviewButton.Content = "Start Preview";
LoopbackClientButton.IsEnabled = false;
mode = defaultMode;
LatencyModeToggle.IsOn = (mode == LatencyMode.LowLatency);
LatencyModeToggle.IsEnabled = false;
await device.InitializeAsync();
var setting = await device.SelectPreferredCameraStreamSettingAsync(MediaStreamType.VideoPreview, ((x) =>
{
var previewStreamEncodingProperty = x as Windows.Media.MediaProperties.VideoEncodingProperties;
return (previewStreamEncodingProperty.Width >= streamFilteringCriteria.HorizontalResolution &&
previewStreamEncodingProperty.Subtype == streamFilteringCriteria.SubType);
}));
previewEncodingProperties = setting as VideoEncodingProperties;
PreviewSetupCompleted();
}
