当NaturalDuration为自动时,WPF MediaElement,持续时间是5秒,我怎么能改变它?
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var uri = new Uri(items[itemIndex++], UriKind.Absolute);
mediaElementMain.Clock = new MediaTimeline(uri).CreateClock();
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private void mediaElementMain_MediaOpened(object sender, RoutedEventArgs e)
{
if(mediaElementMain.NaturalDuration == Duration.Automatic)
{
//????
}
}