Add Marker

byronnash · **Posted:** Thu Aug 12, 2004 11:04 am

I am a little tired and slow today so you will have to forgive me.

I need to add a marker to a layer and cannot figure the process out. The manual has an example, but I cannot get it to work. This is what the docs say:

To set a marker that says “Fade Up” at the 2 second mark:
var myMarker = new Marker("Fade Up");
myLayer.property("Marker").setValueAtTime(2, myMarker);

I've tried adding a layer item to attach the property to like:
var myLayer = app.project.item(1).layer(1);
var myMarker = new myLayer.property.Marker("Fade Up");

I keep getting the error that the property does not have a constructor.

Thanks.

Disciple · **Posted:** Thu Aug 12, 2004 11:46 am

Did you take a look at Paul Tuersley's script "split layer at markers" in the scripts library? I think it works with markers in several ways, so you could probably learn something from taking a look at it.
Maybe Paul can elaborate?

Alex

byronnash · **Posted:** Thu Aug 12, 2004 12:31 pm

I did look at Paul's script, but he never creates a marker. I'm sure it's something simple and basic and I'm looking right past it. My scripting skills are still in the "hack" status.

Thanks.

Paul Tuersley · **Posted:** Thu Aug 12, 2004 3:46 pm

Took me a while to figure this out too, it should be:
var myMarker = new MarkerValue("Fade Up");
myLayer.Marker.setValueAtTime(2, myMarker);

Also, you can add blank markers using:
myLayer.Marker.addKey(2);

Paul T

byronnash · **Posted:** Fri Aug 13, 2004 5:08 am

Thanks Paul, the first snippet you gave worked. I couldn't get the blank marker to work though. I don't really need it, it doesn't hurt anything to name the markers.

This site is great, I hope we can get more people sharing ideas and scripts!

Take care.

Disciple · **Posted:** Tue Aug 24, 2004 11:16 pm

Here is an alternative syntax (probably a bit longer than Paul's)

The following script will set a new marker "Fade Up" at time 0:

// assume app.project.item(1) is CompItem, and has 1 layer.
var myMarker = new Marker("Fade Up");
app.project.item(1).layer(1).property("marker").setValueAtTime(0, myMarker);

If you'd like to set a new marker at current time, do this:

// assume app.project.item(1) is CompItem, and has 1 layer.
var myMarker = new Marker("Fade Up");
app.project.item(1).layer(1).property("marker").setValueAtTime(app.project.item(1).layer(1).time, myMarker);

byronnash · **Posted:** Thu Aug 26, 2004 7:20 am

For some unknown reason, the empty marker script works now. I couldn't get it to work when I tried a while back. I gave it another shot today and it worked. Go figure.

After you make an empty marker, is there a way to go back and give it a name or change it's time value? I haven't delved into that much but I was just curious.

Paul Tuersley · **Posted:** Wed Sep 15, 2004 1:54 pm

Here's some good stuff from Keiko on using markers:

There are 2 example in 1 script. example 1 will change value (comment) of markers.
You can change any other markerValue property with same manner.

example 2 will snap markers to nearest second to time. This is a bit tricky. If I call
setValueAtTime with the "nearest second", I actually create a new marker at new
times. So I store data first, remove original markers and re-set by using data I stored.
I thought markerKeyTime = 10 will set time to 10, but it does not work.

-keiko

Code:

{
   // assume you have app.project.item(1) is comp
   // and comp.layer(1) is layer with multiple markers.
      
   // get markers
         var markers = app.project.item(1).layer(1).property("marker");
   
   // example 1:
   // change existing markers
      
         var undoStr = "Change marker comments";
         
         app.beginUndoGroup(undoStr);

         for(var i = 1; i <= markers.numKeys; i++) {
            // get MarkerValue of each marker
            var markerVal = markers.keyValue(i);
            // set MarkerValue.comment
            markerVal.comment = i + " marker";
            // set marker with new MarkerValue
            markers.setValueAtKey(i, markerVal);
         }
         
         app.endUndoGroup();
         
   // example 2:
   // snap all markers to nearest second in time

         undoStr = "Change marker time";
         var newMarkers = new Array();
         var newTimes = new Array();
         
   
         app.beginUndoGroup(undoStr);

         for(var i = markers.numKeys; i >= 1; i--) {
            // get MarkerValue of each marker
            var markerVal = markers.keyValue(i);
            newMarkers[newMarkers.length] = markerVal;
            // set time to nearest second
            var markerKeyTime = markers.keyTime(i);
            var newMarkerTime = Math.round(markerKeyTime);
            newTimes[newTimes.length] = newMarkerTime;
            // remove original markers
            markers.removeKey(i);
         }

         // add new markers with new value.
         for(var i = 0; i < newMarkers.length; i++) {
            markers.setValueAtTime(newTimes[i], newMarkers[i]);   
         }
         
         app.endUndoGroup();

}

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