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Next: Third Party Tools
- Learn how to use video editing, notation, and recording software by Avid. Our Avid tutorials cover Sibelius, Media Composer, and Pro Tools. Taught by industry experts, our video courses can help you learn to compose scores for film, audio, and video projects.
- In typical video compression algorithms, a 'macro block' is a 16x16 region in the video frame that contains four 8x8 luminance blocks and the two corresponding 8x8 chrominance blocks. Adding Motion to the Mix. Video compression algorithms share many of the compression techniques used in still-image compression.
- 3Details
- 3.4Qt
- 3.5Coin3D
- 3.9Zipios++
- 4LibPack
Overview
These are libraries which FreeCAD uses as third party dependencies during compilation. They are usually dynamically linked libraries and have an extension
.so
in Linux/MacOS and .dll
in Windows, and are accompanied by their header files .h
or .hpp
or similar. If a modified library is necessary, or a wrapper class is needed, the code of the modified library, or the wrapper, has to become part of the FreeCAD source code, and compiled together with it.The dependencies need to be installed in the system before proceeding with compilation; see compile on Linux/Unix, compile on Windows, and compile on MacOS for more information.
If you are compiling using Windows, consider using the LibPack instead of trying to install the libraries individually.
Links
Library name | Version needed | Link to get it |
---|---|---|
Python | >= 3.4 | http://www.python.org/ |
Boost | >= 1.33 | http://www.boost.org/ |
OpenCASCADE | >= 6.7 | http://www.opencascade.org |
Qt | >= 4.1 | https://www.qt.io/ |
Shiboken2 | same as Qt | https://wiki.qt.io/Qt_for_Python/Shiboken |
PySide2 | same as Qt | https://wiki.qt.io/Qt_for_Python/Shiboken |
Coin3D | >= 3.x | https://github.com/coin3d/coin |
SoQt (deprecated) | >= 1.2 | https://github.com/coin3d/soqt |
Quarter | >= 1.0 | https://github.com/coin3d/quarter |
Pivy | >= 0.6.5 | https://github.com/coin3d/pivy/ |
FreeType | >= XXX | XXX |
PyCXX | >= XXX | XXX |
KDL | >= XXX | XXX |
Point Cloud Library | >= XXX | XXX |
Salome SMESH | >= XXX | XXX |
VTK | >= 6.0 | XXX |
Ply | >= 3.11 | https://www.dabeaz.com/ply/ |
Xerces-C++ | >= 3.0 | https://xerces.apache.org/xerces-c/ |
Eigen3 | >= 3.0 | http://eigen.tuxfamily.org/index.php?title=Main_Page |
Zipios++ | >= 0.1.5 | https://snapwebsites.org/project/zipios, https://github.com/Zipios/Zipios |
Zlib | >= 1.0 | http://www.zlib.net/, https://github.com/madler/zlib |
libarea | >= 0.0.20140514-1 | https://github.com/danielfalck/libarea |
Details
Python
Version: 3.3 or higher
License: Python 3.3 license
Python 2 became obsolete in 2019. Further development of FreeCAD will use exclusively Python 3; compatibility with Python 2 won't be tested, so old workbenches and macros that use this version will have to be updated or they may stop working. Please post on the FreeCAD forum if you encounter problems with Python 3.
Python is a popular all-purpose scripting language that is widely used in Linux and open source software. In FreeCAD, Python is used during compilation and also at runtime in different ways. It is used
- to write test scripts to test for different conditions, such as memory leaks, to ensure functionality of the software after changes, for post build checks, and test coverage tests,
- to write macros and macro recording,
- to implement application logic for standard packages,
- to implement auxiliary tools such as the Addon Manager,
- to implement entire workbenches like Draft and Arch,
- to dynamically load packages,
- to implement rules for design (knowledge engineering),
- to do fancy Internet interactions like work groups and PDM
On Linux, Python is usually already installed in your distribution. For Windows you can get a precompiled binary from Python.org or use ActiveState Python, though it is harder to get the debug libraries from the latter one.
Python was chosen as the scripting language for FreeCAD for different reasons:
- It is more object oriented than Perl and Tcl.
- The code is more readable than Perl and Visual Basic.
- It is easier to embed in another application, unlike, say, Java.
In summary, Python is well documented, and it's easy to embed and extend in a C++ application. It is also well tested and has strong support from the open source community. Read more about Python and browse the official documentation at Python.org.
Boost
Version: 1.33 or higher
License: Boost Software License - Version 1.0
The Boost C++ libraries are collections of peer-reviewed, open source libraries that extend the functionality of C++. They are intended to be widely useful across a broad spectrum of applications, and to work well with the C++ Standard Library. The Boost license is designed to encourage their use in both open source and closed source projects.
Due to their popularity and stability, many Boost libraries have been accepted for incorporation into the C++11 standard, and more are planned for inclusion in subsequent C++ standards.
In order to ensure efficiency and flexibility, Boost makes extensive use of templates. Boost has been a source of extensive work and research into generic programming and meta-programming in C++. Read more about Boost by visiting the Boost homepage.
OpenCASCADE Technology
Version: 6.7 or higher
License: version 6.7.0 and later are governed by the GNU Lesser General Public License (LGPL) version 2.1 with additional exception. Earlier versions use the Open CASCADE Technology Public License.
OpenCASCADE Technology (OCCT) is a full-featured, professional grade CAD kernel. It was developed in 1993 and originally called CAS.CADE, by Matra Datavision in France for the Strim (Styler) and Euclid Quantum applications. In 1999 it was released as open source software, and since then it's been called OpenCASCADE.
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OCCT is a big and complex set of C++ libraries that provide functionality required by a CAD application:
- A complete STEP compliant geometry kernel.
- A topological data model and needed functions to work with shapes (cut, fuse, extrude, and many others).
- Standard import and export processors for files like STEP, IGES, VRML.
- A 2D and 3D viewer with selection support.
- A document and project data structure with support for save and restore, external linking of documents, recalculation of design history (parametric modeling) and a facility to load new data types as an extension package dynamically.
There are two main versions of OpenCASCADE in existence in different Linux distributions. One is distributed by the original developers; it is known as OCCT, and is packaged under the names
occ
or occt
. The other version is the 'community edition', abbreviated OCE, and is normally found with the oce
name. FreeCAD can compile against either version, however, since 2016 FreeCAD recommends compiling against the official OCCT libraries rather than the OCE ones. The reason is that the community edition lacks important bug fixes and functions that make using FreeCAD better.To learn more visit the OpenCASCADE website.
Qt
Version: 4.1 or higher
License: GPL v2.0/v3.0 or Commercial; from version 4.5 on also LPGL v2.1.
Qt is one of the most popular graphical user interface (GUI) toolkits available in the open source world. FreeCAD uses this toolkit to draw the interface of the program. For this, the Qt Designer application is very useful as it allows developers to quickly draw the dialogs and windows, export them as XML resource files, and then load these interfaces at runtime.
Further information about Qt libraries and their programming documentation are available at Qt Documentation.
Shiboken2 and Pyside2
Shiboken is the Python binding generator that Qt for Python uses to create the PySide module, in other words, it is the system that is used to expose the Qt C++ API to the Python language.
The original Shiboken and PySide packages were meant to be used with Python 2 and Qt4; since these two versions are considered obsolete in 2019, please use Shiboken2 and PySide2, which work with Python 3 and Qt5. New development of FreeCAD is done with Python 3 and Qt5, so compatibility with Python 2 and Qt4 is not guaranteed after FreeCAD 0.18.
Read more about Shiboken and Pyside on Qt for Python.
Coin3D
Version: 3.0 or higher
License: BSD 3-clause license Moom 3 2 9.
Coin3D is a high-level 3D graphics library with a C++ application programming interface. It uses scenegraph data structures to render real-time graphics suitable for all kinds of scientific and engineering visualization applications.
Coin3D is built on the industry-standard OpenGL immediate mode rendering library, and adds abstractions for higher-level primitives, provides 3D interactivity, and contains many complex optimization features for fast rendering that are transparent for the application programmer.
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Coin3D is compatible with SGI's Open Inventor 2.1 API. This API has become the de facto standard graphics interface for 3D visualization in the scientific and engineering community. It has proved its worth since the year 2000 as a major building block in thousands of engineering applications around the world.
Coin3D (Open Inventor) is used as the 3D viewer in FreeCAD because the OpenCASCADE viewer (AIS and Graphics3D) has limitations and performance bottlenecks, especially with large-scale engineering rendering; other things like textures or volumetric rendering are not entirely supported by the OpenCASCADE viewer.
Coin3D is portable over a wide range of platforms: UNIX, Linux, BSD, MacOS X, and Microsoft Windows operating systems. To read more about this library visit Coin3D homepage.
SoQt (deprecated)
Version: 1.2.0 or higher
License: BSD 3-clause license
SoQt is the Coin3D (Open Inventor) binding to the Qt GUI toolkit.
SoQt is no longer used in FreeCAD, it was replaced by Quarter which is a more recent Qt binding.
Quarter
Version: 1.0 or higher
License: BSD 3-clause license
Quarter is a newer Coin3D binding to the Qt toolkit. A version of it is included in the source code of FreeCAD so it is compiled together with it.
Pivy
Version: 0.6.3 or higher
License: BSD 3-clause license
Pivy is a library that wraps the Coin3d library for use in Python. It is not needed to build FreeCAD or to start it, but it is needed as a runtime dependency by the Draft Workbench, and by other workbenches that use it internally, like Arch and BIM.
If you are not going to use these workbenches, you won't need Pivy.
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Ply
Version: 3.11 or higher
License: BSD 3-clause license
Ply is the Python-Lex-Yacc parser. It is used as a runtime dependency by the OpenSCAD Workbench. If you don't use this workbench, you may not need this package.
For more information see Ply homepage
Xerces-C++
Version: 3.0 or higher
License: Apache Software License Version 2.0
Xerces-C++ is a validating XML parser written in a portable subset of C++. Xerces-C++ makes it easy to give your application the ability to read and write XML data. A shared library is provided for parsing, generating, manipulating, and validating XML documents. Xerces-C++ is faithful to the XML 1.0 recommendation and associated standards.
The parser is used for saving and restoring parameters in FreeCAD. For more information see Xerces-C++ homepage.
Eigen3
Version: 3.0 or higher
License: Starting from the 3.1.1 version, it is licensed under the Mozilla Public License 2.0. Earlier versions were licensed under the GNU Lesser General Public License 3.
Eigen is a C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms.
If you just want to use Eigen, you can use the header files right away. There is no binary library to link to, and no configured header file. Eigen is a pure template library defined in the headers.
Eigen is used in FreeCAD for many vector operations in 3D space. To learn more, visit Eigen homepage.
Zipios++
Version: 0.1.5 or higher
License: GNU Lesser General Public License 2.1
Zipios++ is a C++ library for reading and writing
.zip
files. Access to individual entries is provided through standard C++ iostreams. A simple read-only virtual file system that mounts regular directories and .zip
files is also provided. The structure and public interface of Zipios++ are loosely based on the java.util.zip
package of Java.FreeCAD's native file format
.FCstd
is in reality a .zip
file that stores and compresses other types of data within it, such as BREP and XML files. Airstreamer 1 2 – play videos on your google chromecast. Therefore, Zipios++ is used to save and open compressed archives, including FreeCAD files.A copy of Zipios++ is included in the source code of FreeCAD so it is compiled together with it. If you want to use an external Zipios++ library, provided by your operating system, you may set
-DFREECAD_USE_EXTERNAL_ZIPIOS=ON
with cmake
.Zipios++ uses the Zlib library to perform the actual decompression of files.
Zlib
Version: 1.0 or higher
License: zlib license
Zlib is designed to be a free, general-purpose, lossless
It’s difficult to upload large video files to post on social media or email to your friends. Video files are often just too large to download and upload. The longer it takes to upload a video, the more chance you have of getting an error. That’s when you need video compression software.
Compressing videos takes up less disk space and puts less load on your server. It just makes sense to compress videos before sending them via email. Here are our top suggestions when it comes to video compressing software.
Best Free Video Compression Software to Reduce File Size:
1. WinX HD Video Converter Deluxe
WinX HD Video Converter Deluxe is all-in-one software that lets you download videos, make slideshows, edit videos and more. You can compress or convert HD videos with large sizes, converting them to MP3, MOV, WMV or FLV files that you can upload to YouTube and other social media. It comes with more than 370 video audio codecs and supports virtually all video file formats you task it to handle. It’s easy to use and lets you compress videos quickly.
WinX HD Video Converter Deluxe is all-in-one software that lets you download videos, make slideshows, edit videos and more. You can compress or convert HD videos with large sizes, converting them to MP3, MOV, WMV or FLV files that you can upload to YouTube and other social media. It comes with more than 370 video audio codecs and supports virtually all video file formats you task it to handle. It’s easy to use and lets you compress videos quickly.
2. Blaze Media Pro
Blaze Media Pro is another all-in-one tool that converts videos among other tasks. You can use it to handle numerous media file formats including MP3 WAV, MPEG, AVI and WMA. You can also use it to create and burn audio CDs. Compressing videos just takes a few clicks of the mouse and adjustments to compression settings to complete.
Blaze Media Pro is another all-in-one tool that converts videos among other tasks. You can use it to handle numerous media file formats including MP3 WAV, MPEG, AVI and WMA. You can also use it to create and burn audio CDs. Compressing videos just takes a few clicks of the mouse and adjustments to compression settings to complete.
3. Total Video Converter
The Total Video Converter is just that, a total package. It converts any video and audio to numerous file types and also burns video to DVD, Blu-Ray, AVCHD and more. You can convert many kinds of videos to mobile video or audio, combine several video and audio files to one video file, and rip DVDs as well.
The Total Video Converter is just that, a total package. It converts any video and audio to numerous file types and also burns video to DVD, Blu-Ray, AVCHD and more. You can convert many kinds of videos to mobile video or audio, combine several video and audio files to one video file, and rip DVDs as well.
4. Sorenson Squeeze Video Encoder
The Sorenson Squeeze Video Encoder squeezes much out of the software including compression formats like Flash to QuickTime to WMV. You can set the bps and screen size and figure out how to compress the video while still maintaining the best quality. It’s a popular software choice for pros.
The Sorenson Squeeze Video Encoder squeezes much out of the software including compression formats like Flash to QuickTime to WMV. You can set the bps and screen size and figure out how to compress the video while still maintaining the best quality. It’s a popular software choice for pros.
5. STOIK Video Converter
The STOIK Video Converter lets you convert videos to other formats with little more than a click. It features more than 275 presets and knows the specifications of your video player. You can convert videos between many different formats. Get the pro and add more than 25 video special effects. You can set your video’s bit rate, resolution, screen size and quality then compress with a single click.
The STOIK Video Converter lets you convert videos to other formats with little more than a click. It features more than 275 presets and knows the specifications of your video player. You can convert videos between many different formats. Get the pro and add more than 25 video special effects. You can set your video’s bit rate, resolution, screen size and quality then compress with a single click.
6. iSkySoft Video Converter
The professional quality iSkySoft Video Converter lets you convert any popular video and audio format. That includes HD video and online video formats. It’s designed for Macs but also has a Windows version. The software promotes itself as offering 90 times faster conversion with zero quality loss, like a two-hour HD movie conversion in five minutes.
The professional quality iSkySoft Video Converter lets you convert any popular video and audio format. That includes HD video and online video formats. It’s designed for Macs but also has a Windows version. The software promotes itself as offering 90 times faster conversion with zero quality loss, like a two-hour HD movie conversion in five minutes.
7. VIDEOzilla Video Converter
The VIDEOzilla Video Encoder will support nearly all of the video formats. It includes options like setting the start and end points of your video conversion as well as the video and audio quality and video width and height. There are also numerous codecs options available. The software’s another video converter that works with merely more than a click of your mouse.
The VIDEOzilla Video Encoder will support nearly all of the video formats. It includes options like setting the start and end points of your video conversion as well as the video and audio quality and video width and height. There are also numerous codecs options available. The software’s another video converter that works with merely more than a click of your mouse.
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