1
22 August
2012

Today I (again) installed OpenCV 2.4.2 on OS X (Apple MacBook Pro under Darwin). As we all know, OpenCV is that great computer vision and image processing library that is also integrated into ROS. Getting it to compile on OS X, and to work with Apple's Python, can be a hassle (even with macports or homebrew, both of which have had problems when in comes to OpenCV).

The following special tricks were needed to get OpenCV to compile:

  • 1) Download OpenCV.

  • You need to have XCode and CMake installed.
    Go to the OpenCV folder.
    Edit CMakeLists.txt to add these lines( as per blog.yageek.net)

    if(APPLE)
    list(APPEND HIGHGUI_LIBRARIES ${BZIP2_LIBRARIES} -lmp3lame -lbz2 -lfaac)
    endif(APPLE)


  • 2) Install libfaad


  • curl -L -o faad2-2.7.tar.gz http://sourceforge.net/projects/faac/files/faad2-src/faad2-2.7/faad2-2.7.tar.gz/download
    tar xvzf faad2-2.7.tar.gz
    cd faad2-2.7
    ./configure --disable-dependency-tracking CFLAGS="-arch i386 -arch x86_64" LDFLAGS="-arch i386 -arch x86_64"
    make
    sudo make install
    cd ..



  • 3) Install lame from http://lame.sourceforge.net/:


  • tar xzvf lame-3.99.5.tar.gz
    cd lame-3.99.5
    ./configure
    make
    sudo make install


  • 4) Install/update ffmpeg


  • curl -O http://ffmpeg.org/releases/ffmpeg-0.11.1.tar.gz
    tar xzvf ffmpeg-0.11.1.tar.gz
    cd ffmpeg-0.11.1
    ./configure --enable-libmp3lame --enable-libfaac --enable-nonfree --enable-shared --enable-pic --disable-mmx --arch=x86_64
    make
    sudo make install
    cd ..


  • 5) Now, for Python compatibility...


  • Use ccmake -G "Unix Makefiles"

    Hit "t" for advanced mode.

    change PYTHON_LIBRARY value to /opt/local/lib/libpython2.6.dylib
    and
    PYTHON_INCLUDE_DIR to /opt/local/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6.
    within ccmake.

    For me to have it work with Python, I also had to assure that the architecture was x86_64 not i386. When done, hit "c" to create the configuration, then "g"to go and create the Makefile.

  • 6) make; make install


  • Many of the special configuration issues for OS X and MacPorts seem to be automatically handled, but
    for MacPorts users, Taylor Squared Designs has a nice post on the issues involved in installing OpenCV.


    By Gregory Dudek at | Read (1) or Leave a comment |    
    Comments
    Re: Compiling OpenCV on OS X Lion 10.6.8

    Thank you, thank you, thank you! I have been beating my head against the wall off and on for a week trying to get opencv with python bindings installed on Mac OS X 10.7. This method worked, with the only addition that I got an error when configuring ffmpeg that it couldn't find the libfaac files (note that I had, as you suggested, installed the libfaad files.

    I just downloaded from http://sourceforge.net/projects/faac/files/faac-src,
    and followed the basic installation they suggest:
    ./configure
    make
    sudo make install

    Then, ffmpeg configured and installed fine, as did opencv

    Thanks again!

    [Thanks for the positive feedback. Greg]

    Posted by: Erich Phillips at March 19,2013 16:25
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