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// TMN_markerPerFrame_Workarea.jsx
// written by fabiantheblind
// http://www.the-moron.net
// this makes sense to use it with: pt_ContactSheet.jsxbin
// http://aescripts.com/pt_contactsheet/
// this is for one comp layer could also iterate thru all items in selection

markerPerFrame();
function markerPerFrame(){
app.beginUndoGroup("Marker Per Frame");
    var curComp = app.project.activeItem;
    if (!curComp || !(curComp instanceof CompItem))
    {
        alert("Please select a Composition.");
        return;
    }
	if(curComp.selectedLayers.length < 1){
			alert("sry. You need to select a layer");
		return;
	}

      var layers = curComp.selectedLayers;
      var a = curComp.frameDuration;
      var b = curComp.workAreaDuration;
      var c = curComp.workAreaStart;
      var d = curComp.frameRate;
      
      var len = b*d;
      
     //alert(len);
    for(var j = 0; j < layers.length ; j++){  
        layer =  layers[j];
        
      for(var i = 0; i < len;i++){ 
     var m = new MarkerValue("");
     var markers = layer.property("marker");
	markers.setValueAtTime(c+(i*(a)),m);      
        
    }
}

    


}