Linux下压缩和优化jpg与png图片的方法
网络知识 2023-02-09 13:13www.1681989.comseo网站推广
jpegotim压缩jpg图片
安装jpegotim
如果你有epel yum源，使用如下命令即可
复制代码
# yum stall jpegoptim
压缩图片命令
复制代码
pngcrush优化PNG图片
项目地址http://pmt.sourcefe./pngcrush/
复制代码代码如下:
# wget http://downloads.sourcefe./project/pmt/pngcrush/1.7.88/pngcrush-1.7.88.tar.gz
# tar -xzvf pngcrush-1.7.88.tar.gz
# cd pngcrush-1.7.88
# make
# cp pngcrush /usr/b
pngcrush使用语法
复制代码代码如下:
usage: pngcrush [options except for -e -d] file.png outfile.png
pngcrush -e ext [other options] file.png ...
pngcrush -d dir/ [other options] file.png ...
pngcrush -ow [other options] file.png [tempfile.png]
pngcrush -n -v file.png ...
options:
-bail (bail out of trial when size exceeds best size found
-bit_depth depth (deprecated)
-blacken (zero samples underlyg fully-transparent pixels)
-brute (use brute-force: try 148 different methods)
........更多内容请自己看帮助......
pngcrush简单命令
复制代码代码如下:
pngcrush -brute -e "myimage_pressed.png" myimage.png
.........省略.....
Best pngcrush method = 123 (ws 15 fm 4 zl 9 zs 1) = 124820
for output to ttlsattlsa_new.png
(1.63% critical chunk reduction)
(1.63% filesize reduction)
CPU time decodg 1.560, encodg 7.640, other 0.030, total 9.230 sec.
批量优化PNG图片
复制代码代码如下:
pngcrush -brute -d "/data/site/image.ttlsa./images" .png