Install latest Opencv on Ubuntu 14.04

First of all I suggest to create a working directory where extract all the files needed for the installation using these commands:

mkdir OpenCV

cd OpenCV

Then you have to install some dependencies

sudo apt-get -y remove ffmpeg x264 libx264-dev


sudo apt-get -y install libopencv-dev


sudo apt-get -y install build-essential checkinstall cmake pkg-config yasm


sudo apt-get -y install libtiff4-dev libjpeg-dev libjasper-dev


sudo apt-get -y install libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev libxine-dev libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev libv4l-dev


sudo apt-get -y install python-dev python-numpy


sudo apt-get -y install libtbb-dev


sudo apt-get -y install libqt4-dev libgtk2.0-dev


sudo apt-get -y install libfaac-dev libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev libtheora-dev libvorbis-dev libxvidcore-dev


sudo apt-get -y install x264 v4l-utils ffmpeg


sudo apt-get -y install libgtk2.0-dev

Now you are ready to download and install the latest OpenCv package

wget -O OpenCV-2.4.9.zip http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.9/opencv-2.4.9.zip/download


unzip OpenCV-2.4.9.zip

cd opencv-2.4.9

mkdir build

cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_QT=ON -D WITH_OPENGL=ON ..

make -j4
sudo make install

sudo sh -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf'
sudo ldconfig

NOTE: Building OpenCv will need some time depending on your hardware