After Effects scripts that create a render jobs queue based on the markers of the active comp

markersToRenderJobs.jsx

/*
After Effects JSX Script
Creates render queue jobs from active comp markers (when they have a duration)
Author: G.Breant
*/
(function () {
    var SKIP_IF_EXISTS = true;
    app.beginUndoGroup("Create Render Jobs From Comp Markers");
    var comp = app.project.activeItem;
    if (!(comp && comp instanceof CompItem)) {
        alert("Please select an active composition.");
        return;
    }
    var markerProp = comp.markerProperty;
    if (!markerProp || markerProp.numKeys === 0) {
        alert("No composition markers found.");
        return;
    }
    var projectFile = app.project.file;
    var defaultPath = projectFile ? projectFile.parent.fsName : "~";
    var renderFolder = Folder.selectDialog("Choose render output folder", defaultPath);
    if (!renderFolder) return;
    var mask = prompt(
        "Render name mask (%compName%, %markerName% supported):",
        "%compName%_%markerName%",
        "Render Name Mask"
    );
    if (mask === null) return;
    var rq = app.project.renderQueue;
    var created = 0;
    function sanitizeFileName(name) {
        return name.replace(/[\/\\\:\*\?\"\<\>\|]/g, "_");
    }
    function stripExtension(name) {
        var dot = name.lastIndexOf(".");
        return dot !== -1 ? name.substring(0, dot) : name;
    }
    for (var i = 1; i <= markerProp.numKeys; i++) {
        var mv = markerProp.keyValue(i);
        var dur = mv.duration;
        if (dur <= 0) continue;
        var markerTime = markerProp.keyTime(i);
        var markerName = (mv.comment && mv.comment !== "") ? mv.comment : ("marker_" + i);
        var fileName = mask;
        fileName = fileName.split("%markerName%").join(markerName);
        fileName = fileName.split("%compName%").join(comp.name);
        fileName = sanitizeFileName(fileName);
        if (SKIP_IF_EXISTS) {
            var found = false;
            for (var r = 1; r <= rq.numItems; r++) {
                try {
                    var existingFile = rq.item(r).outputModule(1).file;
                    if (existingFile && stripExtension(existingFile.name) === fileName) {
                        found = true;
                        break;
                    }
                } catch (e) {}
            }
            if (found) continue;
        }
        var item = rq.items.add(comp);
        try { item.applyTemplate("Best Settings"); } catch (e) {}
        var compStart = comp.displayStartTime;
        item.timeSpanStart = markerTime;
        item.timeSpanDuration = dur;
        var om = item.outputModule(1);
        var ext = ".mov";
        try {
            var currentFile = om.file;
            if (currentFile && currentFile.name.indexOf(".") !== -1) {
                ext = currentFile.name.substring(currentFile.name.lastIndexOf("."));
            }
        } catch (e2) {}
        om.file = new File(renderFolder.fsName + "/" + fileName + ext);
        created++;
    }
    alert("Created " + created + " render job(s) from markers with duration.");
    app.endUndoGroup();
})();