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当我单击后效中的播放按钮时,我试图让脚本播放。该脚本假设在播放时通过sliderValue(另一层)不断打开和关闭层。(所以,我希望函数SLIDERCHECKER()在视频播放/渲染时运行每一帧)。

var firstLayer = app.project.item(1).layer(1);
var secondLayer = app.project.item(1).layer(2);
var thirdLayer = app.project.item(1).layer(3);
var fourLayer = app.project.item(1).layer(4);


var sliderValue1 = secondLayer.effect(1).property(1).value;
var sliderValue2 = fourLayer.effect(1).property(1).value;


SLIDERCHECKER();
    
    
function SLIDERCHECKER(){
  
  app.beginUndoGroup("My script action");
  
  if (sliderValue1 > .7  && sliderValue2 < .7)
  {
  
     firstLayer.opacity.setValue(100);
     thirdLayer.transform.opacity.setValue(0);
    // alert("sliderValue1 is higher");
  }
  else if (sliderValue2 > .7 && sliderValue1 < .7)
  {

    thirdLayer.opacity.setValue(100);
    firstLayer.opacity.setValue(0);
    //alert("sliderValue2 is higher");
  }
  else if (sliderValue1 > .7 && sliderValue2 > .7) 
  {
    
   firstLayer.transform.opacity.setValue(100);
   thirdLayer.transform.opacity.setValue(0);
   //alert("both are equal");
  }

  app.endUndoGroup();
  
}
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