Binary package “heif-thumbnailer” in ubuntu focal

ISO/IEC 23008-12:2017 HEIF file format decoder - thumbnailer

 libheif is an ISO/IEC 23008-12:2017 HEIF file format decoder. HEIF is a new
 image file format employing HEVC (h.265) image coding for the best compression
 ratios currently possible.
 .
 A thumbnailer for HEIF images that can be used by Nautilus is provided by this
 package.