Developer Installation guide

These instructions outline how to install Opencast. This is meant for developers. For the installation of a production cluster, take a look at the admin guides.


$ git clone
$ cd opencast
$ mvn clean install -Pdev
$ cd build/opencast-dist-develop-*
$ ./bin/start-opencast

Opencast will then listen on

Default credentials are:

Configuring Git

$ git config --global "Example Name"
$ git config --global
$ ssh-keygen -t ed25519 -C "Example Name <>"
$ cat ~/.ssh/

Go to: Github, click "New SSH Key" and paste your content of into the input field. It should look like:

ssh-ed25519 at9/q0tR69TqQvwnFZuat90k0PY+z7mTyLB7UZXDnmpNHkU/MzO...

Now press "Add SSH Key" and return to your terminal and:

$ ssh -T

Clone Opencast

You can get the Opencast source code by cloning the Git repository.

Cloning the Git repository:

$ git clone

Install Dependencies

Please make sure to install the following dependencies.


ffmpeg >= 3.2.4
maven >= 3.6

Required as a service for running Opencast:

elasticsearch = 7.9.x

Required for some services. Some tests may be skipped and some features may not be usable if they are not installed. Hence, it's generally a good idea to install them.

tesseract >= 3
hunspell >= 1.2.8
sox >= 14.4

Ubuntu 18.04

Update System

$ apt update
$ apt upgrade -y

Install Packages via APT

$ apt install -y git openjdk-11-jdk maven gcc g++ build-essential cmake curl sox hunspell synfig ffmpeg

Install NodeJS (optional)

$ curl -sL | sudo -E bash -
$ sudo apt-get install -y nodejs

Install and start Elasticsearch with Docker

You can use docker-compose to easily run Elasticsearch:

$ cd docs/scripts/devel-dependency-containers
$ docker-compose up -d

To shut the services down again, run:

$ cd docs/scripts/devel-dependency-containers
$ docker-compose down

Set System Java JDK

Choose the Java Version 11 by entering:

$ update-alternatives --config java


Update System

$ dnf update -y

Install Dependencies

$ dnf install$(rpm -E %fedora).noarch.rpm$(rpm -E %fedora).noarch.rpm -y
$ dnf group install 'Development Tools'
$ dnf install -y ffmpeg maven tesseract hunspell sox synfig unzip gcc-c++ tar bzip2 nodejs

macOS 10.14

Update System

Try to install all updates via the App Store or the Apple Icon on the top left corner.

Java JDK 11

Install the JDK 11


Install XCode over the App Store. It will be needed for building and for git.

Install Packages via Homebrew

The Homebrew Project adds a package manager to Mac OS. You can install it by:

$ /usr/bin/ruby -e "$(curl -fsSL"

You can now install needed packages:

$ brew install maven ffmpeg nodejs

Git Bash Completion

In macOS you can not complete or suggest half typed commands with your Tab Key (like you probably know from linux). If you want to use bash completion, you have to install it by

$ brew install bash-completion

Find the location of the configuration file

$ sudo find / -type f -name "git-completion.bash"

Normally it should be in

$ cp /Library/Developer/CommandLineTools/usr/share/git-core/git-completion.bash /usr/local/etc/bash_completion.d/

Then add following line to the bash_profile in home

[ -f /usr/local/etc/bash_completion ] && . /usr/local/etc/bash_completion

Finally apply your changes with

$ source /usr/local/etc/bash_completion.d/git-completion.bash

Build and Start Opencast

You can build now opencast by changing your directory into your opencast location and by running:

$ mvn clean install

After the successfully compilation you can start opencast with:

$ cd build/opencast-dist-develop-*/bin && ./start-opencast

The -Pdev argument decreases the build time and skips the creation of multiple tarballs and turning on the developer tarball.

$ cd opencast && mvn clean install -Pdev
$ cd build/opencast-dist-develop-*/bin && ./start-opencast

For further information visit Development Environment.

Useful Commands for Testing Purposes

For a quick build, you can use the following command to skip Opencast's tests.

$ cd opencast
$ mvn clean install -Pdev -DskipTests=true

To see the whole stacktrace of the installation you can use the following command to disable the trimming.

$ cd opencast
$ mvn clean install -DtrimStackTrace=false

If you want to start opencast in debug mode, you could use the debug argument:

$ cd build/opencast-dist-develop-*/bin && ./start-opencast debug

Modify Code and Build Changes

After you modified your code you can go back to step "Build and Start Opencast" to rebuild Opencast.

Common Build Errors or Fixes

NPM Access Error

To fix an npm access error (example), you can run

$ sudo chown -R $USER:$(id -gn $USER) ~/.config && sudo chown -R $USER:$(id -gn $USER) ~/.npm

JDK Version

Some IDEs attempt to use the most recent version of the JDK. Make sure that your IDE is configured to use JDK 1.8.0.

Slow IDEA Fix

Edit following file

$ sudo nano /etc/sysctl.conf

and copy this text into it

fs.inotify.max_user_watches = 524288

Apply your changes with

$ sudo sysctl -p --system

Intellij Idea IDE Community Edition (optional)

If you are currently on Fedora, you can install it with following command. Make sure, that the versions match, you probably have to change it depending on the most current version.

$ cd && cd Downloads && wget
$ sudo tar -zxvf ideaIC-*.tar.gz -C /opt
$ cd /opt && sudo mv idea-IC-*/ idea && sh /opt/idea/bin/

Otherwise install it by downloading and following the manufacturer guide, select Community Edition:

IDEA Intellij Community Edition

Follow the next steps, if you want to import opencast correctly

Now Idea should import the projects, it could take some time, you can make it faster by following this.

Import the opencast code style configuration by following the steps

Now your IDE should be ready for developing.

Visual Studio Code Editor (optional)

If you are currently on Fedora, you can install it with

$ cd && cd Downloads && sudo rpm --import && sudo sh -c 'echo -e "[code]\nname=Visual Studio Code\nbaseurl=\nenabled=1\ngpgcheck=1\ngpgkey=" > /etc/yum.repos.d/vscode.repo' && dnf check-update && sudo dnf install code -y

Otherwise install it by downloading and following the manufacturer guide:

Visual Studio Code

After installation you can open a folder in bash with

$ code .

Recommended Extensions are