Shell script to batch convert HEIC files to jpeg, leaving the original and its converted side by side. Requires Mac OS or Linux, the find command line tool, and ImageMagick

batch-convert-heic.rb

#!/usr/bin/env ruby

require 'shellwords'

files = `find . -iname '*.heic'`.split("\n")
files.each do |original_file|
  output_file = original_file.gsub(/\.heic\z/i, ' Converted.jpg')
  if File.exist?(output_file)
    STDERR.puts "Skipping output #{output_file} exists."
  else
    cmd = "convert #{Shellwords.escape(original_file)} #{Shellwords.escape(output_file)}"
    puts cmd
    system cmd
  end
en

1. Create ~/bin/batch-convert-heic.rb
2. Add the ~/bin folder to your path in your ZSH or bashrc
3. chmod 755 ~/bin/batch-convert-heic.rb.
4. Now from terminal, you can execute batch-convert-heic.rb to convert all HEIC files in any subfolder to JPEG.

Thankyou, you are a legend :)

Needs a end on line 15, not en

convert not found

@filipeandre This error message indicates that the convert command from ImageMagick is not installed on your Linux system, or it is not in the system's PATH.

Thank you very much @RandelP .
I missed the requirement at gist description, I was expecting the comment at batch-convert-heic.rb body :)

or without needing Ruby on Linux ( and perhaps OS X with brew ):

sudo apt-get install libheif-examples # ( install the library )
for i in *.heic; do heif-convert "$i" "${i%.*}.jpg"; done