String extent = getOneDC(item, "dc.format.extent"); // assumed that user will enter this field with length of song in seconds
if (extent != null && extent.length() > 0) {
extent = extent.split(" ")[0];
Integer duration = Integer.parseInt(extent);
itunes.setDuration(new Duration(duration)); // <itunes:duration>
}
String subject = getOneDC(item, "dc.subject");
if (subject != null && subject.length() > 0) {
String[] subjects = new String[1];