preview video

Question

i want to preview video in windows phone silverlight 8.1 app.is it possible?

Answer 1

You could make a teeny version of a specific video and play that, call it a preview.

They download that and play it.

If they decide to play the full thing they the download that file.

Dowloading a small file would of course be quicker.

Or you could play the video in a small sized  version of the medialement control.

Otherwise, not so much.

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Hope that helps.

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Answer 2

Hi zyRBuqiB,

Do you mean you want to preview video from the capture device? Please try with MediaCapturePreviewSink as following code. More information about MediaCapturePreviewSink, please read below article.
https://msdn.microsoft.com/en-us/library/windows/apps/dn655126(v=vs.105).aspx

private async void StartPreview()
{
    // Initialize the MediaCapture and MediaCapturePreviewSink objects
    mediaCaptureManager = new Windows.Media.Capture.MediaCapture();
    await mediaCaptureManager.InitializeAsync();
    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();

    // Start Preview stream
    await mediaCaptureManager.VideoDeviceController.SetMediaStreamPropertiesAsync(
        Windows.Media.Capture.MediaStreamType.VideoPreview, previewFormat);
    await mediaCaptureManager.StartPreviewToCustomSinkAsync(
        new Windows.Media.MediaProperties.MediaEncodingProfile { Video = previewFormat }, previewSink);


    // Set the source of the VideoBrush used for your preview
    Microsoft.Devices.CameraVideoBrushExtensions.SetSource(viewfinderBrush, previewSink);
}

If misunderstanding, please feel free to let me know.

Best Regards,
Weiwei

Answer 3

Hi Weiwei,

Thank you, it works for me.