.. Copyright (c) 2008-2016 OpenShot Studios, LLC (http://www.openshotstudios.com). This file is part of OpenShot Video Editor (http://www.openshot.org), an open-source project dedicated to delivering high quality video editing and animation solutions to the world. .. OpenShot Video Editor is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. .. OpenShot Video Editor is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. .. You should have received a copy of the GNU General Public License along with OpenShot Library. If not, see . Developers ========== If you are a programmer (or want to become a programmer), and are interested in developing new features, fixing bugs, or improving the user interface for OpenShot, the following sections will explain how to get started and get involved! The Big Picture --------------- OpenShot Video Editor has 3 main components, a Python & PyQt user interface (:openshot-github:`openshot-qt`), a C++ audio library (:openshot-github:`libopenshot-audio`) and a C++ video library (:openshot-github:`libopenshot`). If you are not familiar with Python, PyQt, or C++, those would be great topics to research and learn more about at this point. However, many bugs can be fixed and new features added with only Python knowledge, since the C++ components are not involved in the user interface at all. Python is an amazing language, and is super fun to learn, and is the only prerequisite skill needed to become an OpenShot developer! .. warning:: The instructions that follow are for Ubuntu Linux, which is the easiest environment to configure for OpenShot development. If you are using another OS, I suggest running a virtual machine with Ubuntu LTS before continuing any further. If you must use a Windows or Mac system for development, start by referring to the build notes in the ``libopenshot`` wiki. Building the library with all of its dependencies is the most challenging part of the process. * :libopenshot-wiki:`Windows Build Instructions ` * :libopenshot-wiki:`Mac Build Instructions ` Getting the Latest Source Code ------------------------------ Before we can fix any bugs or add any features, we need to get the source code onto your computer. Use git to clone our 3 repositories: .. code-block:: bash git clone https://github.com/OpenShot/libopenshot-audio.git git clone https://github.com/OpenShot/libopenshot.git git clone https://github.com/OpenShot/openshot-qt.git Configuring your Development Environment ----------------------------------------- In order to actually compile or run OpenShot, we need to install some dependencies on your system. The easiest way to accomplish this is with our `Daily PPA `_. A PPA is an unofficial Ubuntu repository, which has our software packages available to download and install. .. code-block:: bash sudo add-apt-repository ppa:openshot.developers/libopenshot-daily sudo apt-get update sudo apt-get install openshot-qt \ cmake \ libx11-dev \ libasound2-dev \ libavcodec-dev \ libavdevice-dev \ libavfilter-dev \ libavformat-dev \ libavresample-dev \ libavutil-dev \ libfdk-aac-dev \ libfreetype6-dev \ libjsoncpp-dev \ libmagick++-dev \ libopenshot-audio-dev \ libprotobuf-dev \ libqt5svg5-dev \ libswscale-dev \ libunittest++-dev \ libxcursor-dev \ libxinerama-dev \ libxrandr-dev \ libzmq3-dev \ pkg-config \ python3-dev \ protobuf-compiler \ qtbase5-dev \ libqt5svg5-dev \ libxcb-xfixes0-dev \ qtmultimedia5-dev \ swig At this point, you should have all 3 OpenShot components source code cloned into local folders, the OpenShot daily PPA installed, and all of the required development and runtime dependencies installed. This is a great start, and we are now ready to start compiling some code! libopenshot-audio (Build Instructions) -------------------------------------- This library is required for audio playback and audio effects. It is based on the JUCE audio framework. Here are the commands to build it: .. code-block:: bash cd libopenshot-audio mkdir build cd build cmake -DCMAKE_INSTALL_PREFIX=dist .. make make install Essentially, we are switching to the ``libopenshot-audio/build`` folder, then running ``cmake ..`` on the parent folder. This finds dependencies and creates all the needed Makefiles used to compile this library. Then ``make`` uses those Makefiles to compile this library, and ``make install`` installs them in the location we specified. If ``CMAKE_INSTALL_PREFIX`` isn't set, the files will install to ``/usr/local/`` (by default) and ``make install`` will require administrative privileges to run. libopenshot (Build Instructions) -------------------------------- This library is required for video decoding, encoding, animation, and just about everything else. It does all the heavy lifting of video editing and video playback. Here are the commands to build it: .. code-block:: bash cd libopenshot mkdir build cd build cmake -DLIBOPENSHOT_AUDIO_DIR=../../libopenshot-audio/build/dist .. make Essentially, we are switching to the ``libopenshot/build`` folder, then running ``cmake ..`` on the parent folder. This finds dependencies and creates all the needed Makefiles used to compile this library. Then ``make`` uses those Makefiles to compile this library. Because we provided the location of our compiled ``libopenshot-audio`` installation, that version of the library will be used instead of the system version (if any). We don't install our ``libopenshot`` after building, because we don't need to. For testing purposes, we can tell OpenShot to use ``libopenshot`` right from our ``build`` directory. openshot-qt (Launch Instructions) --------------------------------- This is our main PyQt Python application. Because it is written in Python, it does not require any compiling to run. To launch OpenShot from the source code with our newly-built ``libopenshot-audio`` and ``libopenshot`` libraries, use the following commands: .. code-block:: bash cd openshot-qt PYTHONPATH=../libopenshot/build/src/bindings/python python3 src/launch.py This should launch the OpenShot user interface. Any changes you have made to the source code files (``*.py`` Python files, ``*.ui`` PyQt UI files, etc...) will be included. This requires the ``libopenshot-audio`` and ``libopenshot`` libraries, and if anything went wrong with the steps above, OpenShot will likely not launch. If OpenShot launches at this point, congratulations! You now have a working local version of OpenShot, which is running off your local source code. Try making some changes to the source code and re-launch OpenShot... you should now see your changes! GitHub Issues ------------- Now that you have successfully compiled and launched OpenShot Video Editor from source code, be sure to check out our list of bug reports on GitHub: `OpenShot Issues`_. Also, you are encouraged to fill out our quick `contributor form `_ and introduce yourself! Share your Changes ------------------ Once you have fixed a bug or added an amazing new feature, be sure to share it with the OpenShot team. Ideally, we can merge this into our main source code branch. The easiest way to share your changes is by creating a fork of our repo, pushing your changes back to GitHub, and creating a `Pull Request`_. A Pull Request lets the OpenShot team know you have changes ready to be merged. Then we can review things, give feedback, and hopefully merge your changes into the main branch. .. _Pull Request: https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/proposing-changes-to-your-work-with-pull-requests .. _OpenShot Issues: https://github.com/OpenShot/openshot-qt/issues/