Installing OpenCV 3.3.0 on Ubuntu 16.04 LTS

$ sudo apt-get update && sudo apt-get dist-upgrade && sudo apt-get autoremove
$ sudo apt-get install build-essential
$ sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
$ sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev
$ sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev
$ sudo apt-get install libxvidcore-dev libx264-dev
$ sudo apt-get install libgtk-3-dev
$ sudo apt-get install libatlas-base-dev gfortran
$ sudo apt-get install python2.7-dev python3.5-dev
$ cd ~
$ cd ~
$ sudo apt-get install python-pip && pip install --upgrade pip
$ sudo pip install virtualenv virtualenvwrapper
$ sudo rm -rf ~/.cache/pip
$ cd ~
$ nano .bashrc
# virtualenv and virtualenvwrapper
export WORKON_HOME=$HOME/.virtualenvs
$ source ~/.bashrc
$ mkvirtualenv cv -p python3
$ workon cv
$ pip install numpy
$ cd ~/opencv-3.3.0/
$ mkdir build
$ cd build
$ cmake -D CMAKE_BUILD_TYPE=RELEASE \
-D CMAKE_INSTALL_PREFIX=/usr/local \
-D INSTALL_PYTHON_EXAMPLES=ON \
-D INSTALL_C_EXAMPLES=OFF \
-D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib-3.3.0/modules \
-D PYTHON_EXECUTABLE=~/.virtualenvs/cv/bin/python \
-D BUILD_EXAMPLES=ON ..
$ make -j4
$ sudo make install
$ sudo ldconfig
...

[sburw]

I am following your tutorial, but am stuck at the "cmake -D CMAKE_BUILD_TYPE=RELEASE \" statement. It tells me that the "CMake Error: The source directory does not exist.". I can't go any further. Please help me

[renugopalsiva]

Im getting error here :-

/sbin/ldconfig.real: Can't create temporary cache file /etc/ld.so.cache~: Permission denied

[Ibrahim-rwzq]

you made this video but added no comments no background dictation, it would be better you add some explanation and 70% percent of video contains recording just looking at installation.