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

654				 *655				 *     @type string $file  Filename of the newly-uploaded file.656				 *     @type string $url   URL of the uploaded file.657				 *     @type string $type  File type.658				 * }659				 */660				$image_attachment = apply_filters( 'attachment_thumbnail_args', $image_attachment, $metadata, $uploaded );661 662				$sub_attachment_id = wp_insert_attachment( $image_attachment, $uploaded['file'] );663				add_post_meta( $sub_attachment_id, '_cover_hash', $hash );664				$attach_data = wp_generate_attachment_metadata( $sub_attachment_id, $uploaded['file'] );665				wp_update_attachment_metadata( $sub_attachment_id, $attach_data );666				update_post_meta( $attachment_id, '_thumbnail_id', $sub_attachment_id );