AE script - save png via renderQ

savePNG.jsx

    //save png via renderQ
    //script by bigxixi
    //if rendering...？
    function savePNG(theComp,theLocation) {
        //if the resolution isnt 'Full', store current resolution and set to Full, then restore later;
        var res = [1,1];
        if(theComp.resolutionFactor != "1,1"){
            res = theComp.resolutionFactor;
            theComp.resolutionFactor = [1,1];
            }
        
        if(theLocation != null){
            //close the renderQueue panel
            app.project.renderQueue.showWindow(false);
            //show the correct charactar in the path
            theLocation = decodeURIComponent(theLocation);
            //backup the render queue status, then uncheck the queued items
            var RQbackup = storeRenderQueue();
            //check if renderQ rendering, if so,return "R".
            if(RQbackup[RQbackup.length-1] == "rendering"){
                //**an option is to render through 'saveFrameToPng()': **
                //alert("Render Queue is rendering item, now export the png using saveFrameToPng().");
                //theComp.saveFrameToPng(0, theLocation);
                //*******************************************************
                return "R";
            }else{
                //call command "save frame as" to add current frame to render queue
                theComp.openInViewer();
                app.executeCommand(2104);
                app.project.renderQueue.item(app.project.renderQueue.numItems).render = true;
                var templateTemp = app.project.renderQueue.item(app.project.renderQueue.numItems).outputModule(1).templates;
                //call hidden template '_HIDDEN X-Factor 16 Premul', which exports png with alpha
                var setPNG = app.project.renderQueue.item(app.project.renderQueue.numItems).outputModule(1).templates[templateTemp.length-1];
                app.project.renderQueue.item(app.project.renderQueue.numItems).outputModule(1).applyTemplate(setPNG);
                app.project.renderQueue.item(app.project.renderQueue.numItems).outputModule(1).file = new File(theLocation);
                var finalpath = app.project.renderQueue.item(app.project.renderQueue.numItems).outputModule(1).file.fsName;
                app.project.renderQueue.render();
                //remove the rendered item and restored the render queue items
                app.project.renderQueue.item(app.project.renderQueue.numItems).remove();
                if(RQbackup != null){
                    restoreRenderQueue(RQbackup);					
                }
                app.activeViewer.setActive();
                app.project.activeItem.resolutionFactor = res;
            }
        }
        //store the renderQ,return the index of active render items
        function storeRenderQueue(){
            var checkeds = [];
            for(var p = 1;p <= app.project.renderQueue.numItems; p++){
                if (app.project.renderQueue.item(p).status == RQItemStatus.RENDERING){
                    checkeds.push("rendering");
                    break;
                }else if(app.project.renderQueue.item(p).status == RQItemStatus.QUEUED){
                        checkeds.push(p);
                        app.project.renderQueue.item(p).render = false;
                }
            }
            return checkeds;
        }

        //restore the renderQ
        function restoreRenderQueue(checkedItems){
            for(var q = 0;q < checkedItems.length; q++){
                app.project.renderQueue.item(checkedItems[q]).render = true;
            }
        }
    }