search

packjpg / packJPG

A compression program for further compressing JPEG image files
http://packjpg.encode.ru/
GNU Lesser General Public License v3.0
165 stars 26 forks source link

Unable to unpack files compressed with 2.3 #21

Closed ks74 closed 5 years ago

ks74 commented 5 years ago

I packed an image with XnView (it has packjpg as an addon) and now can't unpack it using the last version of the program.

TarVanimelde commented 5 years ago

Different major versions of packJPG are not compatible with each other. 2.3-compressed files will not be decompressable by 2.4 or 2.5, and vice-versa. Iterations of packJPG with the same version number (e.g., 2.3) and different subversions (e.g., 2.3a or 2.3b) will be compatible, however. See https://github.com/packjpg/packJPG/blob/master/docs/versionnumbering.txt