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How to Use Mozilla MozJPEG to Compress Images on CentOS

mozjpegjpeg compressioncentos image optimizationcjpeg commandimage compression tutorial
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The previous article Multiple Image Compression Solutions on CentOS shared three different compression schemes. This article adds an extra open-source project from Mozilla called mozjpeg, which can effectively compress JPEG images.

Install Mozilla JPEG

Source Code Download: https://github.com/mozilla/mozjpeg/releases

# Install nasm environment
yum -y install build-essential nasm
# Download source code
wget https://github.com/mozilla/mozjpeg/archive/v3.3.1.tar.gz
# Extract
.tar -zxvf v3.3.1.tar.gz
# Enter directory
cd mozjpeg-3.3.1
autoreconf -fiv
# Compile and install
./configure
make && make install

After successful installation, the binary files are located in the /opt/mozjpeg/bin directory. You can directly copy them to the /usr/bin directory for use. The compression mainly uses cjpeg. Enter the following command to copy:

[root@aliyun-sgp ~]# ll /opt/mozjpeg/bin
total 256
-rwxr-xr-x 1 root root 56816 Nov 16 13:42 cjpeg
-rwxr-xr-x 1 root root 45864 Nov 16 13:42 djpeg
-rwxr-xr-x 1 root root 53504 Nov 16 13:42 jpegtran
-rwxr-xr-x 1 root root 13624 Nov 16 13:42 rdjpgcom
-rwxr-xr-x 1 root root 64592 Nov 16 13:42 tjbench
-rwxr-xr-x 1 root root 13624 Nov 16 13:42 wrjpgcom
[root@aliyun-sgp ~]# cp /opt/mozjpeg/bin/cjpeg /usr/bin/

Compress Images

Mozilla JPEG only supports compressing JPEG images. The compression command is as follows:

cjpeg -quality 80 xxx.jpg > xxx_1.jpg
# Or
cjpeg -outfile xxx_1.jpg -quality 80 xxx.jpg

The above command compresses xxx.jpg and saves the compressed file as xxx_1.jpg with a compression quality of 80.

  • -quality: Specifies the compression quality (0-100). If not specified, the default is 75. The larger the value, the faster the efficiency, but the worse the compression quality. It is recommended to keep the default value.
  • -outfile: Saves the compressed image under a different name, or you can use the redirect symbol >.

Other Notes