How to Install MozJpeg on Ubuntu 18.04.3

So far, the best jpeg compression available today is from Mozzila, the Mozjpeg. It is also the most up to date, the compression quality of using mozjpeg is similar to the original even lowering the quality to 75%. In this tutorial, we will teach you how to install mozjpeg on your Ubuntu from scratch, including some hiccups with dependencies problem.

Install Dependencies

To fix error such as “Could NOT find PNG (missing: PNG_LIBRARY PNG_PNG_INCLUDE_DIR) (Required is at least version “1.6”)” and “Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR)”, you need to install these dependencies.

sudo apt install zlib1g-dev libpng-dev

Install Compiler Tools

Now we have the dependencies already, we can now proceed on installing the compiler tools for our MozJpeg.

sudo apt-get update
sudo apt-get install cmake autoconf automake libtool nasm make pkg-config

Download the Source

Next is we have to download the zipped source from Github and unzip it. Make sure you’re in your home directory.

cd ~/
wget https://codeload.github.com/mozilla/mozjpeg/zip/master -O mozjpeg-master.zip
unzip mozjpeg-master.zip

If you don’t have unzip installed in your Ubuntu. Just install it via sudo apt-get install unzip.

Building the Source

Now, we can proceed on building the source.

cd mozjpeg-master
mkdir build && cd build
sudo cmake -G"Unix Makefiles" ../

You can also enable PNG support by adding sudo cmake -G"Unix Makefiles" -DPNG_SUPPORTED=ON ../.

If you want to install it right away. You can do sudo make install. When you do this, please proceed immediately to Usage.

sudo make install

(Optional) For some who wants to create an installation deb files, so they can distribute the installer without doing the compilation. You can do this one instead.

sudo make deb

The deb file should be located in the build directory named mozjpeg_4.0.0_amd64.deb.

You can install the deb file by using dpkg. You may also do the same on other server that you want to install mozjpeg without the needs of compilation from scratch.

sudo dpkg -i mozjpeg_4.0.0_amd64.deb

Usage

Now we have successfully installed the mozjpeg, we can now install a symbolic link so we can use it on the command or in your apps.

sudo ln -s /opt/mozjpeg/bin/cjpeg /usr/bin/mozjpeg
sudo ln -s /opt/mozjpeg/bin/jpegtran /usr/bin/mozjpegtran

To use mozjpeg, here are the sample commands:

mozjpeg -quality 70 your_picture.jpg > your_picture_compress.jpg
mozjpegtran -optimize -progressive your_picture_compress.jpg > your_picture_compress.jpg

The example command above will compress the image to 70% quality and it optimize the image by using mozjpegtran. It is ideal to use the combination of mozjpeg and mozjpegtran to get better compression.

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