Ticket #26825: 26825.2.diff

src/wp-admin/includes/media.php

@@ -2616 +2616 @@
         $att_url = wp_get_attachment_url( $post->ID ); ?>
         <div class="wp_attachment_holder">
         <?php
+        if ( $attachment_id && preg_match( '#^(audio|video)#', $post->post_mime_type ) ) {
+                $file = get_attached_file( $attachment_id );
+                $meta = wp_get_attachment_metadata( $attachment_id );
+                if ( empty( $meta ) && file_exists( $file ) ) {
+                        $_meta = get_post_meta( $attachment_id );
+                        $regeneration_lock = 'wp_regenerating_' . $attachment_id;
+                        if ( ! array_key_exists( '_wp_attachment_metadata', $_meta ) && ! get_transient( $regeneration_lock ) ) {
+                                set_transient( $regeneration_lock, $file );
+                                wp_update_attachment_metadata( $attachment_id, wp_generate_attachment_metadata( $attachment_id, $file ) );
+                                delete_transient( $regeneration_lock );
+                        }
+                }
+        }
+
         if ( wp_attachment_is_image( $post->ID ) ) :
                 $image_edit_button = '';
                 if ( wp_image_editor_supports( array( 'mime_type' => $post->post_mime_type ) ) ) {