I have a WinUI 3 project that requires the user to submit a video file, I have been assuming that the framerate is 30fps as it requires time calculations. But I would like the app to automatically get the framerate from metadata, or some other way as I know some video files don’t have framerate data.

The following is how I get the file using a filepicker.

private async void PickAFileButton_Click(object sender, RoutedEventArgs e)
{
    FileOpenPicker fileOpenPicker = new()
    {
        ViewMode = PickerViewMode.Thumbnail,
        FileTypeFilter = { ".mp4" },
    };

    if (App.m_window != null)
    {
        nint windowHandle = WindowNative.GetWindowHandle(App.m_window);
        InitializeWithWindow.Initialize(fileOpenPicker, windowHandle);

        StorageFile file = await fileOpenPicker.PickSingleFileAsync();
        if (file != null)
        {
            PickAFileOutputTextBlock.Text = "Picked file: " + file.Name + "nPath: " + file.Path;

            Frame.Navigate(typeof(VideoView), file);

        }
        else
        {
            PickAFileOutputTextBlock.Text = "Operation cancelled.";
        }
    }
    else
    {
        PickAFileOutputTextBlock.Text = "Window handle is not initialized.";
    }
}