This guide describes how to install and configure OpenCV 2.4.2 and its dependencies on Ubuntu 12.04. This guide includes instructions for both 32-bit and 64-bit systems. Revision History: [2012-09-12] Updated guide to work with OpenCV 2.4.2. Updated ffmpeg section: ffmpeg 0.11.1 now requires -pic option on 64-bit systems. [2012-06-05] Updated guide to work with OpenCV 2.4.1 and Ubuntu 12.04. Added instructions for 64-bit systems.

[2011-08-11] Initial version. Worked with OpenCV 2.3.1 and Ubuntu 11.10. If you need help troubleshooting OpenCV installation problems, see the companion guide “.” The Installation Procedure To install and configure OpenCV 2.4.1, complete the following steps.

The commands shown in each step can be copy and pasted directly into a Linux command line. • Remove any installed versions of ffmpeg and x264. Sudo apt-get remove ffmpeg x264 libx264-dev • Get all the dependencies for x264 and ffmpeg. Sudo apt-get update sudo apt-get install build-essential checkinstall git cmake libfaac-dev libjack-jackd2-dev libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev libsdl1.2-dev libtheora-dev libva-dev libvdpau-dev libvorbis-dev libx11-dev libxfixes-dev libxvidcore-dev texi2html yasm zlib1g-dev • Download and install gstreamer. Sudo apt-get install libgstreamer0.10-0 libgstreamer0.10-dev gstreamer0.10-tools gstreamer0.10-plugins-base libgstreamer-plugins-base0.10-dev gstreamer0.10-plugins-good gstreamer0.10-plugins-ugly gstreamer0.10-plugins-bad gstreamer0.10-ffmpeg • Download and install gtk.

Sudo apt-get install libgtk2.0-0 libgtk2.0-dev • Download and install libjpeg. Sudo apt-get install libjpeg8 libjpeg8-dev • Create a directory to hold source code. Cd ~ mkdir src • Download and install install x264. • Download a recent stable snapshot of x264 from. The exact version does not seem to matter.

To write this guide, I used version x264-snapshot-201-stable.tar.bz2, but I have used previous versions too. Cd ~/src wget ftp://ftp.videolan.org/pub/videolan/x264/snapshots/x264-snapshot-201-stable.tar.bz2 tar xvf x264-snapshot-201-stable.tar.bz2 cd x264-snapshot-201-stable • Configure and build the x264 libraries../configure --enable-static make sudo make install IMPORTANT: If you are running a 64-bit version of Ubuntu, you must configure x264 as shown in the following command:./configure --enable-shared --enable-pic The -shared and -pic options might also be required when you compile for some other architectures, such as ARM. You know you need these options if you get the following error when compiling OpenCV: [ 25%] Building CXX object modules/highgui/CMakeFiles/opencv_highgui.dir/src/bitstrm.cpp.o Linking CXX shared library././lib/libopencv_highgui.so /usr/bin/ld: /usr/local/lib/libavcodec.a(avpacket.o): relocation R_X86_64_32S against `av_destruct_packet' can not be used when making a shared object; recompile with -fPIC /usr/local/lib/libavcodec.a: could not read symbols: Bad value • Download and install install ffmpeg. • Download ffmpeg version 0.11.1 from. Thanks for the post!

I went through every step with any problem until I got to the make of the OpenCV, where this error appeared. Hi, I was trying to install OpenCV 2.4.1 on Ubuntu 12.04. I have followed your installation guide and with 17% of the installation complete, I got the following error – /usr/bin/ld: /usr/local/lib/libavcodec.a(avpacket.o): relocation R_X86_64_32S against `av_destruct_packet’ can not be used when making a shared object; recompile with -fPIC /usr/local/lib/libavcodec.a: could not read symbols: Bad value collect2: ld returned 1 exit status make[2]: *** [lib/libopencv_highgui.so.2.4.1] Error 1 make[1]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/all] Error 2 make: *** [all] Error 2 How do I get through this? In Step 9- I am getting compilation error. I am using OpenCV2.4.1 with 12.04 ubuntu over VM player. /home/shiva/OpenCV-2.4.1/release/modules/core/precomp.hpp:1:0: fatal error: can’t create precompiled header /home/shiva/OpenCV-2.4.1/release/modules/core/precomp.hpp.gch/opencv_core_RELEASE.gch: Permission denied compilation terminated. Preprocessed source stored into /tmp/ccTDynBj.out file, please attach this to your bugreport.

Tutorials How to install and use profiling tool Gprof on. Geek 101: How to install Ubuntu. In this article, we will explore the GNU profiling tool. Ubuntu Tutorials; PostgreSQL DB; Hello World Examples. Here we explain how to install Ubuntu in the three different ways that it is most commonly installed: (1) from a USB drive, (2).

Make[2]: *** [modules/core/precomp.hpp.gch/opencv_core_RELEASE.gch] Error 1 make[1]: *** [modules/core/CMakeFiles/pch_Generate_opencv_core.dir/all] Error 2 make: *** [all] Error 2 why this error??? Got the same error on building.

I re-tried step 7 and this is what I get: Warning: PIX_FMT_RGB is missing from libavutil, update for swscale support Warning: libavformat is not supported without swscale support fatal: Not a git repository (or any of the parent directories):.git platform: X86_64 system: LINUX cli: yes libx264: internal shared: yes static: no asm: yes interlaced: yes avs: no lavf: no ffms: no gpac: no gpl: yes thread: posix filters: crop select_every debug: no gprof: no strip: no PIC: yes visualize: no bit depth: 8 chroma format: all You can run ‘make’ or ‘make fprofiled’ now. Building after this and step 8 produces the same error messages that were first displayed. What should be done now? Hi I am getting the same error in spite of repeating steps 7 and 8 for 64bit.

I deleted the build directory and tried again, but the problem still persists. I would be very grateful if you could help me resolve this issue. I’m trying to install the opencv and use it with python EPD 7.3. While on step 8(b)./configure –enable-gpl –enable-libfaac –enable-libmp3lame –enable-libopencore-amrnb –enable-libopencore-amrwb –enable-libtheora –enable-libvorbis –enable-libx264 –enable-libxvid –enable-nonfree –enable-postproc –enable-version3 –enable-x11grab ERROR: libfaac not found If you think configure made a mistake, make sure you are using the latest version from Git. If the latest version fails, report the problem to the mailing list or IRC #ffmpeg on irc.freenode.net. Include the log file “config.log” produced by configure as this will help solving the problem. I got this problem,i updated my git also.but the problem still persists.

Hi Osman, Thank you very much for the tutorial. I installed OpenCV 2.4.1 successfully under Ubuntu 12.04 (32 bit) and Ubuntu is running in the virtual machine by VirtualBox in WIN 7 (64 bit). The first several attempts failed and got the error message as “make[2]: *** [bin/opencv_perf_imgproc] Error 1 make[1]: *** [modules/imgproc/CMakeFiles/opencv_perf_imgproc.dir/all] Error 2 make: *** [all] Error 2” but I went back and re-configure for step 7,8, taking 64-bit steps and now it works! So again, thanks a lot!!!I am really new to this and finally I got this! Here’s a couple ideas: 1.

Make sure your webcam is UVC compliant. Most of the recent webcams, such as Logitech’s Pro 9000 and C910, are UVC compliant. If you are using a webcam that is more than five years old, try switching to a more recent model. You probably have a loop in your code that ends with a statement like this: key = cvWaitKey( waitTime ). Make sure that the waitTime is not zero. It will probably need to be greater than about 3 or 4 ms.

I have seen the grey screen you mention when the waitTime is set to zero. I had to set –enable-pic also for ffmpeg. Without it it give an error at 17% /usr/bin/ld: /usr/local/lib/libavcodec.a(avpacket.o): relocation R_X86_64_32S against `av_destruct_packet’ can not be used when making a shared object; recompile with -fPIC /usr/local/lib/libavcodec.a: could not read symbols: Bad value collect2: ld returned 1 exit status make[2]: *** [lib/libopencv_highgui.so.2.4.1] Error 1 make[1]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/all] Error 2 make: *** [all] Error 2 with it all OK! (MINT 13 64bit) •. Great article mate, I can’t believe what an ordeal it is to get OpenCV up and running. FYI I’m running 64 bit linux and I had this error on step 10b when I tried to compile OpenCV: [ 25%] Building CXX object modules/highgui/CMakeFiles/opencv_highgui.dir/src/bitstrm.cpp.o Linking CXX shared library././lib/libopencv_highgui.so /usr/bin/ld: /usr/local/lib/libavcodec.a(avpacket.o): relocation R_X86_64_32S against `av_destruct_packet’ can not be used when making a shared object; recompile with -fPIC I fixed it by redoing step 8b but adding the compiler option –enable-pic.

Hi Osman firstly thanks for this guide, clear and precise. Only a thing. It could be great if you could modify step 8, in 64 bit section, adding to configure line “–enable-pic” this resolve 25%] Building CXX object modules/highgui/CMakeFiles/opencv_highgui.dir/src/bitstrm.cpp.o Linking CXX shared library././lib/libopencv_highgui.so /usr/bin/ld: /usr/local/lib/libavcodec.a(avpacket.o): relocation R_X86_64_32S against `av_destruct_packet’ can not be used when making a shared object; recompile with -fPIC definetely thanks •.

Hi Osman I am uing 64bit servion. I am up to step 8b. After running the one for 64 bit servion, I run “make ” and got this error hien@ubuntu:~/src/ffmpeg-0.11.1$ make LDlibavutil/libavutil.so.51 /usr/bin/ld: libavutil/intfloat_readwrite.o: relocation R_X86_64_PC32 against undefined symbol `ldexp@@GLIBC_2.2.5′ can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: final link failed: Bad value collect2: ld returned 1 exit status make: *** [libavutil/libavutil.so.51] Error 1 How can I fix it?

I try to ignore it and continue then at stepp 10, I get the Error 2. On this step:./configure –enable-static make. Hi Osman, This is a very good guide for OpenCV installation. I installed it and went through a couple of examples and works good.

But I tried some older code and I got the following error: /usr/bin/ld: cannot find -lcv /usr/bin/ld: cannot find -lcxcore /usr/bin/ld: cannot find -lml /usr/bin/ld: cannot find -lhighgui /usr/bin/ld: cannot find -lcvaux /usr/bin/ld: cannot find -liomp5 collect2: ld returned 1 exit status make: *** [bin/afers] Error 1 Do you know how could I fix this? I tried looking for the files but I haven’t found them. Hi, thanks so much for your tutorial so detail. I have tried to much to install and compile with Opencv ( on Windows and Ubuntu too). But I have problem with linking. Now, I try again with your guide.

That’s better. But, I’m in a trouble: giang @ ubuntu: ~ / src $ cd OpenCV-2.4.2 / giang @ ubuntu: ~ / build $ cd src/OpenCV-2.4.2 giang @ ubuntu: ~ / src/OpenCV-2.4.2/build $ g+ + ‘pkg-config opencv – cflags’ Drawing_1.cpp-o test ‘pkg-config opencv – libs’ g+ +: error: pkg-config opencv – cflags: No such file or such g+ +: error: pkg-config opencv – libs: No such file or such I don’t understand what’s happend. You can help me? I really need your help in this case. Thank you so much. Thanks a lot for the great guide. I am new to Linux and searched for guides like that.

This is indeed the best I have found so far. I almost made OpenCV install to complete successfully. I experience problem with stage 7. For some reason the call to./config fails. I get the following error: “fatal: Not a git repository (or any of the parent directories):.git” and the relevant properties are not changed.

You have two separate problems: 1. The configure of x264 failed. You really should fix this before building opencv. Make sure you are running “./configure” and not “./config” as you just stated. Also make sure you have a recent snapshot of x264.

Someone else had a similar problem which I think was because they downloaded a snapshot created in 2005! Make sure that 2012 is in the name of the snapshot file. Make sure ran the “cd” command as shown in step 7a.

It looks like you are on a 64-bit system. You need to redo steps 7 and 8 using the commands shown in the sections labeled IMPORTANT. That is, you need to use the --enable-shared --enable-pic options. After fixing the two problems, build opencv again. I’m sure it will work this time.

Let me know if you have any more problems. Thanks for your prompt response. I downloaded the latest stable release of x264 (from December 2012) and followed steps 7 and 8. I then deleted the build folder in opencv and recreated it again and built the project. I have removed all src directory and restarted the process again.

I have deleted all files related to the previous installaion and uninstalled anything that is related to ffmpeg from the linux (to my poor understanding in Linux). I have tried all the process from the start but still fail on make at the same stage: /usr/local/lib/libavcodec.a(libx264.o): In function `X264_init’: /home/guy/Documents/work/src/ffmpeg-0.11.1/libavcodec/libx264.c:478: undefined reference to `x264_encoder_open_124′ collect2: ld returned 1 exit status make: *** [x264] Error 1 the folder /home/guy/Documents/work/src does not exist anymore. Do I have to delete Linux and re-install all over again to be able to install openCV? Well, I start to understand why OpenCV is so much more popular on Windows.

Do you have any idea how can I easily reset this installation? (I must say OpenCV installation is not for Linux novice. Maybe I should give up) Thanks for your support so far, Guy •. Hey Osman, I installed OpenCV 2.4.3 by following your procedure. It installed without any errors.

It looks like you might have an old version of ffmpeg (6.2) installed, and opencv is trying to link to that version. Run dpkg --get-selections grep ffmpeg to see if ffmpeg has been previously installed as a package. If it has, use sudo apt-get remove to remove the packages. If you want to remove the software that you compiled yourself, go to the directory for the software, and type make uninstall. However, I don’t think you need to do this.

I would double check that you ran make install for the software that you compiled yourself. If you don’t install it, opencv won’t be able to find it. I tried compiling the basic program to load and display an image the result was: g++ `pkg-config opencv –cflags` p1.cpp -o p1 `pkg-config opencv –libs` Package opencv was not found in the pkg-config search path. Perhaps you should add the directory containing `opencv.pc’ to the PKG_CONFIG_PATH environment variable No package ‘opencv’ found Package opencv was not found in the pkg-config search path. Perhaps you should add the directory containing `opencv.pc’ to the PKG_CONFIG_PATH environment variable No package ‘opencv’ found g++: error: p1.cpp: No such file or directory g++: fatal error: no input files compilation terminated.

I have something wrong with step 9.please help methank you. Hi Osman I have a problem when i try to open camera with OpenCV. My enviroment is:Ubuntu 12.0： UTC.my procedure is followed: 1.I use the cmake tool to generate a Makefile.

I succeed to install until the last command for OpenCV. When command sudo make install It takes quite less than it needs to be.

I got the result above. There is no error so I dont know what I did wrong Install the project — Install configuration: “Release” — Installing: /usr/local/include/opencv2/opencv_modules.hpp — Installing: /usr/local/lib/pkgconfig/opencv.pc — Installing: /usr/local/share/OpenCV/OpenCVConfig.cmake — Installing: /usr/local/share/OpenCV/OpenCVConfig-version.cmake — Up-to-date: /usr/local/include/opencv/cxcore.hpp — Installing: /usr/local/bin/opencv_traincascade — Set runtime path of “/usr/local/bin/opencv_traincascade” to “/usr/local/lib” •.

Hi, I am installing OpenCV on Ubuntu 13.04.

With and web browser Community Various (notably and ) OS family Working state Current Source model Marketing target Personal computers, mobile devices, embedded devices, servers, mainframes, supercomputers Platforms (with kernel only) and,,,,,,,,,,,,,,,,,,,,,,,,,,, (with kernel only) type () or (GNU, fork of ) GNU,,,, Official website GNU ( ) is an and an extensive collection of computer software. GNU is composed wholly of, most of which is licensed under the 's own. GNU is a for 'GNU's Not Unix!' , chosen because GNU's design is, but differs from Unix by being free software and containing no code. The GNU project includes an,, which was the original focus of the (FSF). However, non-GNU kernels, most famously, can also be used with GNU software; as the Hurd kernel is not yet production-ready, this is how the GNU system is usually used. The combination of GNU software and the Linux kernel is commonly known as (or less frequently GNU/Linux; see ).

Contents • • • • • • • • History [ ] Development of the GNU operating system was initiated by while he worked at the (MIT) Artificial Intelligence Laboratory. It was called the, and was publicly announced on September 27, 1983, on the net.unix-wizards and net.usoft. Barry Harris Jazz Workshop Pdf Printer more. Software development began on January 5, 1984, when Stallman quit his job at the Lab so that they could not claim ownership or interfere with distributing GNU components as free software. Richard Stallman chose the name by using various plays on words, including the song. ( ) The goal was to bring a wholly free software operating system into existence. Stallman wanted computer users to be free to study the source code of the software they use, share software with other people, modify the behavior of software, and publish their own modified versions of the software. This philosophy was later published as the in March 1985.

Richard Stallman's experience with the (ITS), an early operating system written in that became obsolete due to discontinuation of, the computer architecture for which ITS was written, led to a decision that a system was necessary. ( ) It was thus decided that the development would be started using and as system programming languages, and that GNU would be compatible with Unix. At the time, Unix was already a popular operating system.

The design of Unix was modular, so it could be reimplemented piece by piece. Much of the needed software had to be written from scratch, but existing compatible third-party free software components were also used such as the typesetting system, the, and the microkernel that forms the basis of the core of (the official kernel of GNU).

With the exception of the aforementioned third-party components, most of GNU has been written by volunteers; some in their spare time, some paid by companies, educational institutions, and other non-profit organizations. In October 1985, Stallman set up the (FSF).

In the late 1980s and 1990s, the FSF hired software developers to write the software needed for GNU. As GNU gained prominence, interested businesses began contributing to development or selling GNU software and technical support. The most prominent and successful of these was, now part of. Components [ ]. Main article: The system's basic components include the (GCC), the (glibc), and (coreutils), but also the (GDB), (binutils), the shell and the. GNU developers have contributed to Linux of GNU applications and utilities, which are now also widely used on other operating systems such as variants, and.

Many GNU programs have been ported to other operating systems, including platforms such as and macOS. GNU programs have been shown to be more reliable than their proprietary Unix counterparts.

As of November 2015, there are a total of 466 GNU packages (including decommissioned, 383 excluding) hosted on the official GNU development site. GNU variants [ ]. An example of an FSF approved distribution that uses a model The official kernel of GNU Project was the microkernel; however, as of 2012, the became officially part of the GNU Project in the form of, a variant of Linux with all proprietary components removed. With the April 30, 2015 release of the Debian GNU/HURD 2015 distro, GNU OS now provides the components to assemble an operating system that users can install and use on a computer. This includes the kernel, that is currently in a pre-production state. The Hurd status page states that 'it may not be ready for production use, as there are still some bugs and missing features. However, it should be a good base for further development and non-critical application usage.'

Due to Hurd not being ready for production use, in practice these operating systems are. They contain the Linux kernel, GNU components and software from many other projects. Looking at all program code contained in the Linux distribution in 2011, GNU encompassed 8% and the Linux kernel 9%. Other kernels like the FreeBSD kernel also work together with GNU software to form a working operating system. The FSF maintains that an operating system built using the and GNU tools and utilities, should be considered a, and promotes the term GNU/Linux for such systems (leading to the ). The GNU Project has endorsed Linux distributions, such as, and.

Other GNU variants which do not use the Hurd as a kernel include Debian GNU/kFreeBSD and Debian GNU/NetBSD, bringing to fruition the early plan of GNU on a BSD kernel. Copyright, GNU licenses, and stewardship [ ] The GNU Project recommends that contributors assign the copyright for GNU packages to the Free Software Foundation, though the Free Software Foundation considers it acceptable to release small changes to an existing project to the. However, this is not required; package maintainers may retain copyright to the GNU packages they maintain, though since only the copyright holder may enforce the license used (such as the GNU GPL), the copyright holder in this case enforces it rather than the Free Software Foundation. For the development of needed software, Stallman wrote a license called the (first called Emacs General Public License), with the goal to guarantee users freedom to share and change free software.

Stallman wrote this license after his experience with and a program called UniPress, over a controversy around software code use in the program. For most of the 80s, each GNU package had its own license: the Emacs General Public License, the GCC General Public License, etc. In 1989, FSF published a single license they could use for all their software, and which could be used by non-GNU projects: the (GPL). This license is now used by most of GNU software, as well as a large number of free software programs that are not part of the GNU Project; it is also the most commonly used.

It gives all recipients of a program the right to run, copy, modify and distribute it, while forbidding them from imposing further restrictions on any copies they distribute. This idea is often referred to as. In 1991, the (LGPL), then known as the Library General Public License, was written for the to allow it to be linked with proprietary software. 1991 also saw the release of version 2 of the GNU GPL.

The (FDL), for documentation, followed in 2000. The GPL and LGPL were revised to version 3 in 2007, adding clauses to protect users against that prevent user to run modified software on their own devices. Besides GNU's own packages, the GNU Project's licenses are used by many unrelated projects, such as the, often used with GNU software. A minority of the software used by most of, such as the X Window System, is licensed under. The GNU Operating System.. September 4, 2009.

Retrieved October 9, 2009. The name ‘GNU’ is a for ‘GNU's Not Unix‘; it is pronounced g-noo, as one syllable with no vowel sound between the g and the n. • ^ (March 9, 2006)..

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[] Almost no one has actually been able to use the OS; it's really more a set of ideas than an operating system.' • Hillesley, Richard (June 30, 2010),, The H (online ed.), p., Nearly twenty years later the HURD has still to reach maturity, and has never achieved production quality. [] Some of us are still wishing and hoping for the real deal, a GNU operating system with a GNU kernel.

• Lessig, Lawrence. The Future of Ideas: The Fate of the Commons in a Connected World, p.

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