To follow up on that:
https://www.macrumors.com/how-to/batch-convert-images-to-different-formats-using-macos-preview/
You may like the results imagemagick gives, here are some helpers:
https://imagemagick.org/script/convert.php
https://stackoverflow.com/questions/30414346/batch-command-for-imagemagick-to-convert-all-files-in-a-directory-and-sub-direct
p.s. That raw file format is looking pretty good about now, eh? 😀😀