function makeEncoding($height = 0, $width = 0, $data = 0, $fw = 0, $bytes = 0, $datablocks = 0, $rsblocks = 0) {
        $t = array(
            'height' => $height,
            'width' => $width,
            'data' => $data,
            'fw' => $fw,
            'bytes' => $bytes,
            'datablocks' => $datablocks,
            'rsblocks' => $rsblocks
        );
        return $t;
    }