Is there any way to move the time indicator of timeline to first frame of the layer using Photoshop script?

Hi there I see the dropbox file is deleted... what I am looking for sounds to be similar... All I want to do is create an action that places the playhead at the beginning of the selected layer.
I haven't implemented scripts into a photoshop action before so any help would be great.

Many thanks,

Tom

Thanks r-bin​  for that excellent suggestion.    Unfortunately when dealing with longer videos,  moving through each frame to check for the enabled transforms is very slow.   it works!  but trying to come up with something faster. 

Any other suggestions on how to locate the start time position of a layer in the timeline panel?

I've been digging around in the descriptors and just can't find anything.

The only other option I can think of is to add an event watcher,  and track the position of the layer as moveInPoint, moveOutPoints and moveAllTime events happen... but that seems so overly complicated when I just need to extract that number that I know Photoshop knows already.  Reaching out to community for suggestions.

For your file there is a solution provided that the Layer2 animation ends no later than the animation of the other layers

Works even in CS6.

//if (get_curr_frame()) runMenuItem(stringIDToTypeID("timelineGoToFirstFrame")); // bad variant
goto_frame(0);
var x1 = get_frame_count();
runMenuItem(stringIDToTypeID("timelineMoveLayerInPoint"))
var x2 = get_frame_count();
executeAction(charIDToTypeID("undo"), undefined, DialogModes.NO);
goto_frame(x1-x2);
function get_curr_frame()
    {
    var r = new ActionReference();    
    r.putProperty(stringIDToTypeID("property"), stringIDToTypeID("currentFrame"));    
    r.putClass(stringIDToTypeID("timeline"));    
    return executeActionGet(r).getInteger(stringIDToTypeID("currentFrame"));  
    }
function get_frame_count()
    {
    var r = new ActionReference();    
    r.putProperty(stringIDToTypeID("property"), stringIDToTypeID("frameCount"));    
    r.putClass(stringIDToTypeID("timeline"));    
    return executeActionGet(r).getInteger(stringIDToTypeID("frameCount"));  
    }
function goto_frame(f)
    {
    var d = new ActionDescriptor();  
    var r = new ActionReference();  
    r.putProperty(stringIDToTypeID("property"), stringIDToTypeID("time"));  
    r.putClass(stringIDToTypeID("timeline"));  
    d.putReference(stringIDToTypeID("null"), r);  
    var d1 = new ActionDescriptor();  
    d1.putInteger(stringIDToTypeID("frame"), f);  
    d.putObject(stringIDToTypeID("to"), stringIDToTypeID("timecode"), d1);  
    executeAction(stringIDToTypeID("set"), d, DialogModes.NO);  
    }

PS. In general, it is necessary to duplicate the document. Delete all layers in it except activeLayer. Run the script to get (x1-x2). And in the original document do positioning on the frame (x1-x2).

I have not found the best yet.

The following method will allow you to move the time indicator to a specific place, but I couldn't figure out how (via script or the GUI) to grab the timestamp of a particular key frame. If you know how to do that it should be easy to then use the method below for the purpose you described (I don't know if PS provides that functionality or not).

As r-bin mentioned, if you provided a sample .psd file it might help.

#target photoshop
setTimelineTime(2, 25, 30);
function setTimelineTime(seconds, frame, frameRate) {
    var timelineReference = new ActionReference();
    timelineReference.putProperty( s2t( "property" ), s2t( "time" ));
    timelineReference.putClass( s2t( "timeline" ));
   
    var timeDescriptor = new ActionDescriptor();
    timeDescriptor.putInteger( s2t( "seconds" ), seconds );
    timeDescriptor.putInteger( s2t( "frame" ), frame );
    timeDescriptor.putDouble( s2t( "frameRate" ), frameRate );
   
    var timelineDescriptor = new ActionDescriptor();
    timelineDescriptor.putReference( c2t( "null" ), timelineReference );
    timelineDescriptor.putObject( s2t( "to" ), s2t( "timecode" ), timeDescriptor );
    executeAction( s2t( "set" ), timelineDescriptor, DialogModes.NO );
    }
function c2t (c) {
    return app.charIDToTypeID(c);
    }
function s2t (s) {
    return app.stringIDToTypeID(s);
    }

I have never worked with animation or timeline. But if you provide a simplified file with layers and your animation, I can try to do what you need if it works and I will have time for it.