如何在視頻處於暫停狀態時將視頻添加爲覆蓋圖UWP

我正在使用MediElement播放視頻。現在我想在視頻處於暫停狀態時添加文本。這怎麼可能？如何在視頻處於暫停狀態時將視頻添加爲覆蓋圖UWP

<MediaElement Name="videoMediaElement" AreTransportControlsEnabled="True" Stretch="Fill" MediaOpened="videoMediaElement_MediaOpened" CurrentStateChanged="Media_State_Changed" > 
<MediaElement.TransportControls> 
<MediaTransportControls Background="Red" Foreground="White" IsStopButtonVisible="True" IsStopEnabled="True" IsTextScaleFactorEnabled="True" IsPlaybackRateEnabled="True" IsPlaybackRateButtonVisible="True" IsFastForwardButtonVisible="True" IsFastForwardEnabled="True" IsFastRewindButtonVisible="True" IsFastRewindEnabled="True" /> 
</MediaElement.TransportControls> 
</MediaElement> 

private async void Media_State_Changed(object sender, RoutedEventArgs args) 
    { 
     if (videoMediaElement.CurrentState == MediaElementState.Paused) 
     { 
     //write a text here 
     } 
    }

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2017-10-10 user2431727

只需在MediaElement之後的XAML中添加TextBlock並將其更改爲可見性 –

我想在視頻上顯示文本。不是mediaelement的外部 – user2431727

您可以設置文本偏移量還是具有某些特效？ –

就試試這個：

<Grid> 
     <MediaElement Name="videoMediaElement" AreTransportControlsEnabled="True" Stretch="Fill" MediaOpened="videoMediaElement_MediaOpened" CurrentStateChanged="Media_State_Changed" > 
      <MediaElement.TransportControls> 
       <MediaTransportControls Background="Red" Foreground="White" IsStopButtonVisible="True" IsStopEnabled="True" IsTextScaleFactorEnabled="True" IsPlaybackRateEnabled="True" IsPlaybackRateButtonVisible="True" IsFastForwardButtonVisible="True" IsFastForwardEnabled="True" IsFastRewindButtonVisible="True" IsFastRewindEnabled="True" /> 
      </MediaElement.TransportControls> 
     </MediaElement> 

     <TextBlock Text="asdf" Foreground="White" HorizontalAlignment="Center" VerticalAlignment="Center"/> 
    </Grid>

您也可以改變父母Grid到Canvas並設置Canvas.Top/Canvas.Left到TextBlock。或者只是使用Margin。

來源

2017-10-10 10:34:37

如何在視頻處於暫停狀態時將視頻添加爲覆蓋圖UWP

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