Binary package “libmng2” in ubuntu focal

Multiple-image Network Graphics library

 The libmng library supports decoding, displaying, encoding, and various other
 manipulations of the Multiple-image Network Graphics (MNG) format image files.
 It uses the zlib compression library, and optionally the JPEG library by the
 Independent JPEG Group (IJG) and/or lcms (little cms), a color-management
 library by Marti Maria Saguar.