QREncode wrapper for large files

#!/usr/bin/env bash

FileName=$1
FileSize=$(stat -c%s "$FileName")

remainingSize=$FileSize
maxBytesPerQR=2331
chunkSize=$maxBytesPerQR
errorMode=M
z=0

while [ $remainingSize -gt 0 ]
do
    if [ $chunkSize -gt $remainingSize ]; then
        chunkSize=$remainingSize
    fi
    remainingSize=$((remainingSize-chunkSize))
    #echo "FileName: $FileName"
    #echo "maxBytesPerQR: $maxBytesPerQR"
    #echo "chunkSize: $chunkSize"
    #echo "z: $z"
    #echo "errorMode: $errorMode"
    dd "if=$FileName" ibs=$maxBytesPerQR obs=$chunkSize count=1 skip=$z status=none | qrencode --output="${FileName}_${z}.png" --level=$errorMode --8bit --type=PNG
    z=$((z+1))
done