wp_generate_attachment_metadata for non-images files
wp_generate_metatadata() should create metadata for image, video, and audio file types. There is and if/elseif conditional in the source that limits the function to those three. However, the last line is: return apply_filters( ‘wp_generate_attachment_metadata’, $metadata, $attachment_id ); So you could use the wp_generate_attachment_metadata filter to generate the metadata you want. There are plenty of answers … Read more