- https://github.com/strukturag/libheif/
- https://twitter.com/NielsMache/status/946068315448987648
- https://twitter.com/NielsMache/status/939943440879620096
% heif-convert USAGE: heif-convert [-q quality] <filename> <output>
% heif-convert USAGE: heif-convert [-q quality] <filename> <output>