< Kdenlive Revision as of 21:47, 3 April 2020 (view source)CamilleM2 (talk | contribs) (→Dependencies for localization)← Older edit Revision as of 10:48, 4 April 2020 (view source) CamilleM2 (talk | contribs) m (→Pre-requisites and Supported Platforms)Newer edit → Line 10: Line 10: * Arch Linux * Arch Linux −You Current development code requires '''Qt >= 5.7''', '''KF5 >= 5.50''','''MLT >= 6.18.0'''.+You should be able to build it on any platform that provides up to date versions of the following dependencies '''Qt >= 5.7''', '''KF5 >= 5.50''','''MLT >= 6.18.0'''. To get a recent enough version fo mlt on Ubuntu, you have to add [https://launchpad.net/~kdenlive/+archive/ubuntu/kdenlive-master Kdenlive's ppa] To get a recent enough version fo mlt on Ubuntu, you have to add [https://launchpad.net/~kdenlive/+archive/ubuntu/kdenlive-master Kdenlive's ppa] Revision as of 10:48, 4 April 2020 Kdenlive is rather easy to build (at least on supported platforms), and this page should show you the simple steps to get there. If you encounter any problem during the process or spot any information that should be added/updated, please don't hesitate to reach out to the Developer's mailing list or on the Telegram Kdenlive Developers' group . Contents 1 Pre-requisites and Supported Platforms 2 Installing dependencies 2.1 Development tooling 2.2 KDE Frameworks 5, based on Qt5 2.3 Multimedia stack 2.4 Dependencies for localization 3 Getting the source code 3.1 Cloning the git repo 3.2 Selecting the branch 4 Building Kdenlive 5 Next Steps 6 IDE Setup 6.1 Setting up KDevelop 6.2 Setting up QtCreator 7 MLT documentation 8 Environment variables 9 Contact 9.1 Telegram 9.2 Mailing List Pre-requisites and Supported Platforms Kdenlive is primarily developed on GNU/Linux. There is an effort to build Kdenlive on Microsoft Windows, but it's still a work in progress. Currently supported distributions are: Ubuntu 19.10 Eoan Ermine and derivatives Arch Linux You should be able to build it on any platform that provides up to date versions of the following dependencies Qt >= 5.7, KF5 >= 5.50,MLT >= 6.18.0. To get a recent enough version fo mlt on Ubuntu, you have to add Kdenlive's ppa sudo add-apt-repository ppa:kdenlive/kdenlive-master sudo apt-get update Installing dependencies It is recommended to uninstall the official kdenlive packages to avoid potential conflicts. sudo apt remove kdenlive kdenlive-data Development tooling You will need classical development tools (like git, gcc ...) but also cmake : sudo apt install build-essential git cmake extra-cmake-modules libsm-dev KDE Frameworks 5, based on Qt5 On Ubuntu the following packages will pull all the necessary dependencies: sudo apt install libkf5archive-dev libkf5bookmarks-dev libkf5coreaddons-dev libkf5config-dev \ libkf5configwidgets-dev libkf5dbusaddons-dev libkf5kio-dev libkf5widgetsaddons-dev \ libkf5notifyconfig-dev libkf5newstuff-dev libkf5xmlgui-dev libkf5declarative-dev \ libkf5notifications-dev libkf5guiaddons-dev libkf5textwidgets-dev libkf5purpose-dev \ libkf5iconthemes-dev kdoctools-dev libkf5crash-dev libkf5filemetadata-dev kio \ kinit qtdeclarative5-dev libqt5svg5-dev qml-module-qtquick-controls \ qtmultimedia5-dev qtquickcontrols2-5-dev Multimedia stack If your distribution packages a recent enough version of MLT (>= 6.10.0), you can install it directly along with ffmpeg and frei0r plug-ins. Otherwise, you'll have to add our ppa or compile it yourself (see above) sudo apt install libmlt++-dev libmlt-dev melt frei0r-plugins ffmpeg Dependencies for localization There are some additional dependencies required by the specific script to fetch the translations: sudo apt install ruby subversion gnupg2 gettext Getting the source code Cloning the git repo The easiest way to get Kdenlive source code is to clone the git repo: git clone https://invent.kde.org/kde/kdenlive.git Selecting the branch You should generally base your developments on the master branch cd kdenlive git checkout master or if you want to get the code for a given release cd kdenlive git checkout release/20.04 Building Kdenlive Create a directory for the build inside the kdenlive directory: mkdir build cd build To avoid problems with plugins and libraries, it is easier to install Kdenlive in /usr: cmake .. -DKDE_INSTALL_USE_QT_SYS_PATHS=ON -DCMAKE_INSTALL_PREFIX=/usr -DRELEASE_BUILD=OFF Alternately you can build it with debug flags (advanced users only ;-) and you need to have clang installed ) : cmake .. -DKDE_INSTALL_USE_QT_SYS_PATHS=ON \ -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug \ -DCMAKE_CXX_COMPILER=/usr/bin/clang++ \ -DECM_ENABLE_SANITIZERS='address' \ -DBUILD_TESTING=ON -DBUILD_FUZZING=ON -DBUILD_COVERAGE=OFF \ -DRELEASE_BUILD=OFF To fetch the translations of the application : make fetch-translations This should create a po sub-directory in your build directory. You have then to create a symbolic link to this po subdirectory : cd .. ln -s build/po/ po cd build/ Then build and install: make -j5 sudo make install You can then start your compiled version by simply entering: kdenlive If you have compiled it in debug mode, you may encounter errors like SUMMARY: AddressSanitizer: new-delete-type-mismatch (/usr/bin/kdenlive+0x643020) ==6982==HINT: if you don't care about these errors you may set ASAN_OPTIONS=new_delete_type_mismatch=0 ==6982==ABORTING As the hint says, the you can solve this with export ASAN_OPTIONS=new_delete_type_mismatch=0 Next Steps Now that you've got a working dev environment, you can head to [some nice first issues to solve] You can also get some general info on the TechBase tutorial Building An Existing Application. You may also be interested in the other tutorials on TechBase. IDE Setup Pick your favourite! Setting up KDevelop Open KDevelop and go to Project > Open/Import project Then select the CMakeLists.txt file in the kdenlive source folder. You can now start hacking on Kdenlive! Setting up QtCreator After checking out Kdenlive from git—when working on refactoring, you may want to clone two copies, one with the next branch and another one on the refactoring branch—, you can open the CMakeLists.txt in QtCreator, which will load the project if cmake succeeds. If you run/debug Kdenlive, make sure that kdenlive and not kdenlive_render is selected as an active project. If you let QtCreator restore the previous session (File > Session manager), it will remember the open documents. Environment variables (see below) can be set in Projects > Build Environment. MLT documentation Kdenlive uses MLT’s C++ API called mlt++. This API is not documented as it is simply a wrapper to C functions. For example, the documentation of Mlt::Consumer::position() can be found in framework/mlt_consumer.c:mlt_consumer_position(). The actual C function name is usually a combination of the class name and the function name, but can also be found by consulting mlt++/MltConsumer.cpp:position(). Environment variables If kdenlive crashes on startup (e.g. in QtCreator) and shows a message like: kdenlive(24309) KXMLGUIClient::setXMLFile: cannot find .rc file "kdenliveui.rc" for component "kdenlive" then you have to ensure the .rc file is found. If CMake is configured to install Kdenlive to /usr/local, the .rc file is put there, but when kdenlive is then run from the build directory, the KXMLGUIClient will not search there. Solution: Set the environment variable KDEDIRS to $KDEDIRS:/usr/local. You can get more information about the paths that are checked by running kdenlive like this: strace build/src/kdenlive 2>&1 | grep kdenliveui.rc Contact Telegram Main group Developer group Mailing List The kdenlive developer mailing list archives can be found here A searchable archive of the kdenlive developer mailing list can be found here Information on how to subscribe can be found here Retrieved from "https://community.kde.org/index.php?title=Kdenlive/Development&oldid=87945" Content is available under Creative Commons License SA 4.0 unless otherwise noted.