apply_filters( 'attachment_thumbnail_args', array $image_attachment, array $metadata, array $uploaded )

668				 *669				 *     @type string $file  Filename of the newly-uploaded file.670				 *     @type string $url   URL of the uploaded file.671				 *     @type string $type  File type.672				 * }673				 */674				$image_attachment = apply_filters( 'attachment_thumbnail_args', $image_attachment, $metadata, $uploaded );675 676				$sub_attachment_id = wp_insert_attachment( $image_attachment, $uploaded['file'] );677				add_post_meta( $sub_attachment_id, '_cover_hash', $hash );678				$attach_data = wp_generate_attachment_metadata( $sub_attachment_id, $uploaded['file'] );679				wp_update_attachment_metadata( $sub_attachment_id, $attach_data );680				update_post_meta( $attachment_id, '_thumbnail_id', $sub_attachment_id );