public static IEnumerable FadeInto(this MediaPlayerCtrl self, MediaPlayerCtrl target, float time)
{
var fOt = self.FadeOut(time, MathR.LerpType.LINEAR).GetEnumerator();
var fIn = target.FadeIn(time, MathR.LerpType.LINEAR).GetEnumerator();
while (fOt.MoveNext() | fIn.MoveNext())
{
yield return(null);
}
}