libmng -THE reference library for reading, displaying, writing and examining Multiple-Image Network Graphics.
MNG is the animation extension to the popular PNG image-format.
basE91 is an advanced method for encoding binary data as ASCII characters. It is similar to UUencode or base64, but is more efficient. The overhead produced by basE91 depends on the input data. It amounts at most to 23% and can range down to 14%.