FLIF is a lossless image format based on MANIAC compression.
MANIAC (Meta-Adaptive Near-zero Integer Arithmetic Coding)
is a variant of CABAC (context-adaptive binary arithmetic coding),
where the contexts are nodes of decision trees which are
dynamically learned at encode time.
For versions of Ubuntu between 14.04 LTS (Trusty Tahr) and 15.10 (Wily Werewolf), as well as Ubuntu flavours that don’t include snap by default, snap can be installed from the Ubuntu Software Centre by searching for snapd.
Alternatively, snapd can be installed from the command line:
sudo apt update
sudo apt install snapd
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.
Install FLIF - Free Lossless Image Format
To install FLIF - Free Lossless Image Format, simply use the following command: