gifdiff --version (return code: 0)
gifdiff (LCDF Gifsicle) 1.90
Copyright (C) 1998-2017 Eddie Kohler
This is free software; see the source for copying conditions.
There is NO warranty, not even for merchantability or fitness for a
particular purpose.
gifdiff --help (return code: 0)
'Gifdiff' compares two GIF files (either images or animations) for identical
visual appearance. An animation and an optimized version of the same animation
should compare as the same. Gifdiff exits with status 0 if the images are
the same, 1 if they're different, and 2 if there was some error.
Usage: gifdiff [OPTION]... FILE1 FILE2
Options:
-q, --brief Don't report detailed differences.
-w, --ignore-redundancy Ignore differences in redundant frames.
-B, --ignore-background Ignore differences in background colors.
-h, --help Print this message and exit.
-v, --version Print version number and exit.
Report bugs to <ekohler@gmail.com>.