optipng - advanced PNG (Portable Network Graphics) optimizer
OptiPNG - Optimize Portable Network Graphics files
安裝
shell> brew install optipng
shell> yum install optipng
shell> apt-get install optipng
-preserve preserve file attributes if possible
Preserve[prɪˋzɝv]保留pre・serve
shell> optipng file.png
shell> optipng -o7 file.png
shell> optipng file1.png file2.gif file3.tif
shell> optipng -o5 file1.png file2.gif file3.tif
shell> optipng -i1 -o7 -v -full -sim experiment.png
shell> optipng -o7 -f4 -strip all -quiet -preserve file.png
shell> find . -type f -name "*.png" -exec optipng {} \;
shell> optipng -strip all file.png
** Error: Lossy operations are not currently supported
shell> optipng -v
OptiPNG 0.6.4: Advanced PNG optimizer.
Copyright (C) 2001-2010 Cosmin Truta.
This program is open-source software. See LICENSE for more details.
Portions of this software are based in part on the work of:
Jean-loup Gailly and Mark Adler (zlib)
Glenn Randers-Pehrson and the PNG Development Group (libpng)
Miyasaka Masaru (BMP support)
David Koblas (GIF support)
Using libpng version 1.2.49 and zlib version 1.2.7
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