Audio file’s length (duration) is missing from Attachment Details in Media Library

I’m uploading a different mp3 file to each post as an attachment and using wp_get_attachment_metadata() to print the duration of the mp3 file. Sometimes the response from wp_get_attachment_metadata() does not contain the file length and when I inspect the mp3s inside the Media Library, some of them display a length and some do not:   … Read more

RSS audio enclosures have length of zero (podcast duration is missing)

I have had success at creating an RSS feed with enclosures containing episodes of my podcast by simply creating a post and inserting an mp3 file from my media library into it via the robust Add Media functionality of the post editor. However, I have found that the RSS feed created from these posts includes an enclosure for each mp3 file with its length attribute set to zero: