wp_add_id3_tag_data

	<label for="attachment_content" class="attachment-content-description"><strong><?php _e( 'Description' ); ?></strong>
	<?php

	if ( preg_match( '#^(audio|video)/#', $post->post_mime_type ) ) {
		echo ': ' . __( 'Displayed on attachment pages.' );
	}

	?>
	</label>
	<?php wp_editor( format_to_edit( $post->post_content ), 'attachment_content', $editor_args ); ?>

	</div>
	<?php

	$extras = get_compat_media_markup( $post->ID );
	echo $extras['item'];
	echo '<input type="hidden" id="image-edit-context" value="edit-attachment" />' . "\n";
}

/**
 * Displays non-editable attachment metadata in the publish meta box.
 *
 * @since 3.5.0
 */
function attachment_submitbox_metadata() {
	$post          = get_post();
	$attachment_id = $post->ID;

	$file     = get_attached_file( $attachment_id );
	$filename = esc_html( wp_basename( $file ) );

	$media_dims = '';
	$meta       = wp_get_attachment_metadata( $attachment_id );

	if ( isset( $meta['width'], $meta['height'] ) ) {
		$media_dims .= "<span id='media-dims-$attachment_id'>{$meta['width']}&nbsp;&times;&nbsp;{$meta['height']}</span> ";