I am trying to get some metadata from an mp3 file in WordPress. Specifically the length variable. Here is a bit of my code. It's not shown here but I have included the wp-admin/includes/media.php file. When I look at my page http://beta.openskyministry.org/podcasts/ I just see empty tags for <itunes:length></itunes:length>
Let me know If you need anything else to help answer my question.
$aud_meta = wp_read_audio_metadata($aud_url); ?>
<item>
<title><?php the_title(); ?></title>
<itunes:author><?php echo htmlspecialchars((get_bloginfo('name'))); ?></itunes:author>
<itunes:summary><?php echo htmlspecialchars(strip_tags(get_the_excerpt())); ?></itunes:summary>
<itunes:length><?php echo $aud_meta['length_formatted']; ?></itunes:length>