WPF setting up Video player from ViewModel - wpf

Question

I am working on a WPF application. I need a player to play a file but I need the player in ViewModel as I need it to create snapshot on the player from the ViewModel. This is not working as I can hear the sound but the video is blank.
What am I Missing.
<ContentControl HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Content="{DynamicResource IconSnapShot}" />
Full XAML
<Window x:Class="TestPlayer.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:TestPlayer"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Grid>
<Grid>
<ContentControl Content="{Binding PlayerFrameworkElement, NotifyOnSourceUpdated=True}" Visibility="{Binding PlayerVisibility}" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Background="Red"/>
</Grid>
</Grid>
</Window>
ViewModel
using Gu.Wpf.Media;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
public class PlayerModelView : NotifyPropertyChanged
{
private MediaElementWrapper playerFrameworkElement = new MediaElementWrapper();
private Uri sourcePath;
public PlayerModelView()
{
this.SourcePath = new Uri(#"J:\file.mkv", UriKind.Absolute);
}
public Uri SourcePath
{
get
{
return this.sourcePath;
}
set
{
this.sourcePath = value;
this.PlayerFrameworkElement.Source = null;
this.PlayerFrameworkElement.Source = value;
}
}
public MediaElementWrapper PlayerFrameworkElement
{
get
{
return this.playerFrameworkElement;
}
set
{
this.playerFrameworkElement = value;
this.RaisePropertyChanged(() => this.PlayerFrameworkElement);
}
}
}
}
// --------------------------------------------------------------------------------------------------------------------
//
//
//
// --------------------------------------------------------------------------------------------------------------------
#region
using System;
using System.ComponentModel;
using System.Linq.Expressions;
#endregion
/// <summary>
/// The notify property changed.
/// </summary>
public abstract class NotifyPropertyChanged : INotifyPropertyChanged
{
#region Public Events
/// <summary>
/// The property changed.
/// </summary>
public event PropertyChangedEventHandler PropertyChanged;
#endregion
#region Methods
/// <summary>
/// The raise property changed.
/// </summary>
/// <param name="propertyExpression">
/// The property expression.
/// </param>
/// <typeparam name="TProperty">
/// </typeparam>
protected void RaisePropertyChanged<TProperty>(Expression<Func<TProperty>> propertyExpression)
{
var memberExpression = (MemberExpression)propertyExpression.Body;
var propertyName = memberExpression.Member.Name;
RaisePropertyChanged(propertyName);
}
/// <summary>
/// The raise property changed.
/// </summary>
/// <param name="propertyName">
/// The property name.
/// </param>
private void RaisePropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
#endregion
}