ref: 7c2e795156b5d969bdc807da910a35aa3afd315a
parent: ad1850d0f841bbd6245d5c09e3f6b750abf550f8
author: Sigrid Haflínudóttir <ftrvxmtrx@gmail.com>
date: Tue Sep 1 17:06:50 EDT 2020
leave dctd (jpeg) as is for now, ie just do a plain copy in the filter