private void CreateMediaObjects()
{
// Create our encoding profile based on the size of the item
// TODO: This only really makes sense for monitors, we need
// to change this to make sense in all cases.
int width = _captureItem.Size.Width;
int height = _captureItem.Size.Height;
// Describe our input: uncompressed BGRA8 buffers comming in at the monitor's refresh rate
// TODO: We pick 60Hz here because it applies to most monitors. However this should be
// more robust.
var videoProperties = VideoEncodingProperties.CreateUncompressed(MediaEncodingSubtypes.Bgra8, (uint)width, (uint)height);
_videoDescriptor = new VideoStreamDescriptor(videoProperties);
_videoDescriptor.EncodingProperties.FrameRate.Numerator = c_frameRateN;
_videoDescriptor.EncodingProperties.FrameRate.Denominator = c_frameRateD;
_videoDescriptor.EncodingProperties.Bitrate = (uint)(c_frameRateN * c_frameRateD * width * height * 4);
// Create our MediaStreamSource
_mediaStreamSource = new MediaStreamSource(_videoDescriptor);
_mediaStreamSource.BufferTime = TimeSpan.FromSeconds(0);
_mediaStreamSource.Starting += OnMediaStreamSourceStarting;
_mediaStreamSource.SampleRequested += OnMediaStreamSourceSampleRequested;
// Create our device manager
_mediaGraphicsDevice = MediaGraphicsDevice.CreateFromMediaStreamSource(_mediaStreamSource);
_mediaGraphicsDevice.RenderingDevice = _device;
// Create our transcoder
_transcoder = new MediaTranscoder();
_transcoder.HardwareAccelerationEnabled = true;
}
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
DisplayInformation.AutoRotationPreferences = DisplayOrientations.Landscape;
//
// Doing all that video processing is too much for low-end phones like the Lumia 520
// Pick-and-choose which piece should run
//
VideoPreview.MediaFailed += VideoPreview_MediaFailed;
//var file = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Assets/video.cvmpilj.mjpg"));
//var stream = await file.OpenAsync(FileAccessMode.Read);
//var source = await HttpMjpegCaptureSource.CreateFromStreamAsync(stream, "myboundary");
var source = await HttpMjpegCaptureSource.CreateFromUriAsync("http://216.123.238.208/axis-cgi/mjpg/video.cgi?camera&resolution=640x480");
VideoPreview.SetMediaStreamSource(source.Source);
var settings = new MediaCaptureInitializationSettings
{
StreamingCaptureMode = StreamingCaptureMode.Video
};
await settings.SelectVideoDeviceAsync(VideoDeviceSelection.BackOrFirst);
_capture = new MediaCapture();
await _capture.InitializeAsync(settings);
var graphicsDevice = MediaGraphicsDevice.CreateFromMediaCapture(_capture);
var previewProps = (VideoEncodingProperties)_capture.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview);
TextLog.Text += String.Format("Preview: {0} {1}x{2} {3}fps\n", previewProps.Subtype, previewProps.Width, previewProps.Height, previewProps.FrameRate.Numerator / (float)previewProps.FrameRate.Denominator);
TextLog.Text += "Creating MediaSamplePresenter from SurfaceImageSource\n";
var image = new SurfaceImageSource((int)previewProps.Width, (int)previewProps.Height);
ImagePreview.Source = image;
_imagePresenter = ImagePresenter.CreateFromSurfaceImageSource(image, graphicsDevice, (int)previewProps.Width, (int)previewProps.Height);
TextLog.Text += "Creating MediaSamplePresenter from SwapChainPanel\n";
_swapChainPresenter = ImagePresenter.CreateFromSwapChainPanel(
SwapChainPreview,
graphicsDevice,
(int)previewProps.Width,
(int)previewProps.Height
);
TextLog.Text += "Creating MediaReader\n";
_mediaReader = await MediaReader.CreateFromMediaCaptureAsync(_capture, AudioInitialization.Deselected, VideoInitialization.Bgra8);
TextLog.Text += "Starting video loop\n";
var ignore = Task.Run(() => VideoLoop());
}
public void CS_WP_N_Basic()
{
ExecuteOnUIThread(async() =>
{
var capture = new MediaCapture();
await capture.InitializeAsync(new MediaCaptureInitializationSettings
{
StreamingCaptureMode = StreamingCaptureMode.Video
});
var graphicsDevice = MediaGraphicsDevice.CreateFromMediaCapture(capture);
var previewProps = (VideoEncodingProperties)capture.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview);
var image = new SurfaceImageSource((int)previewProps.Width, (int)previewProps.Height);
var imagePresenter = ImagePresenter.CreateFromSurfaceImageSource(
image,
graphicsDevice,
(int)previewProps.Width,
(int)previewProps.Height
);
var panel = new SwapChainPanel();
var swapChainPresenter = ImagePresenter.CreateFromSwapChainPanel(
panel,
graphicsDevice,
(int)previewProps.Width,
(int)previewProps.Height
);
var readerProps = VideoEncodingProperties.CreateUncompressed(MediaEncodingSubtypes.Bgra8, previewProps.Width, previewProps.Height);
readerProps.FrameRate.Numerator = previewProps.FrameRate.Numerator;
readerProps.FrameRate.Denominator = previewProps.FrameRate.Denominator;
var captureReader = await CaptureReader.CreateAsync(
capture, new MediaEncodingProfile
{
Video = readerProps
});
using (MediaSample2D sample = (MediaSample2D)await captureReader.GetVideoSampleAsync())
{
swapChainPresenter.Present(sample);
imagePresenter.Present(sample);
var folder = await KnownFolders.PicturesLibrary.CreateFolderAsync("MediaCaptureReaderTests", CreationCollisionOption.OpenIfExists);
var file = await folder.CreateFileAsync("CS_WP_N_Basic.jpg", CreationCollisionOption.ReplaceExisting);
await sample.SaveToFileAsync(file, ImageCompression.Jpeg);
}
});
}
