Recursively converts .heic files to .jpg for a specified root directory

heic2jpg.sh

#!/bin/bash
# Recursively converts all HEIC files to JPG for the specified directory.
# Skips any files that have already been converted.
# Requires ImageMagick
#
# usage: ./heic2jpg.sh [RootDirectory]
#
rootDir=$1

set -e

if [ -z "$rootDir" ]
then
    echo "Need to specify root directory."
    exit 1
fi

find $rootDir -type f -iname "*.heic" | while read f
do
    ft=$(file -b "$f")
    n=$(echo $f | sed 's/.heic/.jpg/I')

    if [[ $ft == JPEG* ]]; then
        echo "wrong file ext. mv '$f' to '$n'"
        mv "$f" "$n"
        continue
    fi

    if [ -f '$n' ]; then
        echo "alredy converted. Skipping $f"
        continue
    fi

    echo "converting '$f' to '$n'"
    magick "$f" "$n"
    rm $f
done