标签:sed lower using get orm pkg rar speed with
1.安装
wget http://pngquant.org/pngquant-2.8.2-src.tar.gz
tar -xzf pngquant-2.8.2-src.tar.gz
cd pngquant-2.8.2
安装依赖:yum install libpng-devel
./configure
make && make install
ok ,安装完成。
pngquant -h 看是否正常,如果报:pngquant: error while loading shared libraries: liblcms2.so.2: cannot open shared object file: No such file or directory
重新装一下liblcms2 , yum install http://pkgrepo.linuxtech.net/el6/release/x86_64/liblcms2-2.4-1.el6.x86_64.rpm 解决
See pngquant -h
for full list of options.
--ext new.png
Set custom extension for output filename. By default -or8.png
or -fs8.png
is used.
--quality min-max
Instructs pngquant
to use the least amount of colors required to meet or exceed the max quality. If conversion results in quality below the min quality the image won‘t be saved (if outputting to stdout, 24-bit original will be output) and pngquant
will exit with status code 99.
pngquant --quality=65-80 image.png
--speed N
, -sN
Speed/quality trade-off from 1 (brute-force) to 10 (fastest). The default is 3. Speed 10 has 5% lower quality, but is 8 times faster than the default.
--iebug
Workaround for IE6, which only displays fully opaque pixels. pngquant
will make almost-opaque pixels fully opaque and will avoid creating new transparent colors.
--version
Print version information to stdout.
-
Read image from stdin and send result to stdout.
--
Stops processing of arguments. This allows use of file names that start with -
. If you‘re using pngquant
in a script, it‘s advisable to put this before file names:
pngquant $OPTIONS -- "$FILE"
使用pngquant命令近乎无损压缩PNG图片大小减少70%左右
标签:sed lower using get orm pkg rar speed with
原文地址:http://www.cnblogs.com/cnsanshao/p/6253201.html