Recursively converts .heic files to .jpg on linux for a specified root directory (coming from an iOS11 device over USB)

heicToJpg.sh

#!/bin/bash
# Recursively converts all HEIC files to JPG for the specified directory. Skips any files that have already
# been converted. Requires tifig, download latest  release from github:
# https://github.com/monostream/tifig/releases and install at /usr/bin/tifig
# (or add the install location you choose to your $PATH)
#
# usage: ./heicToJpg.sh [RootDirectory]
#
rootDir=$1
if [ -z "$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'"
    # tifig -i '$f' -o '$n'
    heif-convert '$f' '$n'
done