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How to: Play Media with Animations

This example shows how to play media and animations at the same time by using the MediaTimeline and DoubleAnimationUsingKeyFrames classes in the same Storyboard.

Example

You can use one or more MediaTimeline objects in a Storyboard together with other Timeline objects, such as animations.

The following example sets the SlipBehavior property of the Storyboard to a value of Slip, which specifies that the animation does not progress until the media (video in this example) progresses. This functionality might be needed if media playback is delayed because of loading time.

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >
  <Canvas>

    <!-- Upper right hand Canvas contains the animations. -->
    <Border BorderBrush="Black" BorderThickness="1"  Canvas.Left="250">
      <Canvas Width="250" Height="250" Background="White" >

        <!-- The two Path elements below create the purple and gold rings
             which are animated while the media is played. -->
        <Path Stroke="Purple" StrokeThickness="5">
          <Path.Data>
            <EllipseGeometry x:Name="MyEllipseGeometry" 
            Center="125,125" RadiusX="15" RadiusY="10" />
          </Path.Data>
        </Path>
        <Path Stroke="Gold" StrokeThickness="5">
          <Path.Data>
            <EllipseGeometry x:Name="MyEllipseGeometry2" 
            Center="125,125" RadiusX="10" RadiusY="15" />
          </Path.Data>
        </Path>
      </Canvas>
    </Border>

    <!-- Upper left hand Canvas contains the video. -->
    <Canvas Width="250" Height="250" Background="Green">
      <MediaElement Name="myvideo" Width="250" Height="250" 
       Canvas.Left="0" Canvas.Top="0">
        <MediaElement.Triggers>
          <EventTrigger RoutedEvent="MediaElement.Loaded">
            <EventTrigger.Actions>
              <BeginStoryboard>

                <!-- This Storyboard contains both media (video in this example) and animations. Note 
               the SlipBehavior value of "Slip" specifies that the animation does not progress
               until the media progresses. This might be desirable if media playback is delayed
               because of loading time. -->
                <Storyboard SlipBehavior="Slip">

                  <!-- The MediaTimeline controls the timing of the video and acts like other Timeline objects.  
                 For example, although the video clip (numbers.wmv) lasts longer, playback ends after six  
                 seconds because that is the duration of the MediaTimeline (Duration="0:0:6"). -->
                  <MediaTimeline Source="media\numbers.wmv" BeginTime="0:0:0" Duration="0:0:10"/>

                  <!-- The animations below animate the ellipses in the right hand pane. These animations are 
                 timed to correspond to the counting in the video. -->

                  <!-- Animate the RadiusY property of the purple ellipse. -->
                  <DoubleAnimationUsingKeyFrames
                    Storyboard.TargetName="MyEllipseGeometry"
                    Storyboard.TargetProperty="RadiusY"
                    RepeatBehavior="10x">
                    <DoubleAnimationUsingKeyFrames.KeyFrames>
                      <LinearDoubleKeyFrame Value="80" KeyTime="0:0:0.4" />
                      <SplineDoubleKeyFrame KeySpline="0.6,0.0 0.9,0.00" Value="0" KeyTime="0:0:1" />
                    </DoubleAnimationUsingKeyFrames.KeyFrames>
                  </DoubleAnimationUsingKeyFrames>

                  <!-- Animate the RadiusX property of the gold ellipse. -->
                  <DoubleAnimationUsingKeyFrames
                    Storyboard.TargetName="MyEllipseGeometry2"
                    Storyboard.TargetProperty="RadiusX"
                    RepeatBehavior="10x">
                    <DoubleAnimationUsingKeyFrames.KeyFrames>
                      <LinearDoubleKeyFrame Value="80" KeyTime="0:0:0.4" />
                      <SplineDoubleKeyFrame KeySpline="0.6,0.0 0.9,0.00" Value="0" KeyTime="0:0:1" />
                    </DoubleAnimationUsingKeyFrames.KeyFrames>
                  </DoubleAnimationUsingKeyFrames>

                </Storyboard>
              </BeginStoryboard>
            </EventTrigger.Actions>
          </EventTrigger>
        </MediaElement.Triggers>
      </MediaElement>
    </Canvas>
    
  </Canvas>
</Page>

For the complete sample, see Media Gallery.

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