sudo apt-get -y update
sudo apt-get -y upgrade
sudo apt-get -y dist-upgrade
sudo apt-get -y autoremove
sudo apt-get install -y build-essential cmake
GUI (if you want to use GTK instead of Qt, replace 'qt5-default' with 'libgtkglext1-dev' and remove '-DWITH_QT=ON' option in CMake):
sudo apt-get install -y libgtkglext1-dev libvtk6-dev
sudo apt-get install -y zlib1g-dev libjpeg-dev libwebp-dev libpng-dev libtiff5-dev libjasper-dev libopenexr-dev libgdal-dev
sudo apt-get install -y libdc1394-22-dev libavcodec-dev libavformat-dev libswscale-dev libtheora-dev libvorbis-dev libxvidcore-dev libx264-dev yasm libopencore-amrnb-dev libopencore-amrwb-dev libv4l-dev libxine2-dev
FFMPEG for Debian 8 taken from (with some modifications and updates from myself) https://support.assetbank.co.uk/hc/en-gb/articles/115005343247-Installing-Ffmpeg-on-Debian-GNU-Linux-Version-8-0-Jessie-
cd ..
mkdir src_ffmpeg
cd src_ffmpeg
wget http://ffmpeg.org/releases/ffmpeg-3.3.tar.bz2
tar xvjf ffmpeg-3.3.tar.bz2
./configure --enable-gpl --enable-postproc --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libx264 --enable-shared --enable-pthreads --enable-nonfree --extra-cflags="-fPIC"
make -j4
sudo make install
sudo apt-get install -y libtbb-dev libeigen3-dev
sudo apt-get install -y python-dev python-tk python-numpy python3-dev python3-tk python3-numpy
sudo apt-get install -y ant default-jdk
sudo apt-get install -y doxygen
sudo apt-get install -y unzip wget
cd ~
wget https://github.com/Itseez/opencv/archive/3.0.0.zip
unzip 3.0.0.zip
rm 3.0.0.zip
cd opencv-3.0.0
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=RELEASE -DWITH_TBB=ON -DWITH_XINE=ON -DWITH_IPP=ON -DWITH_FFMPEG=ON -DCMAKE_INSTALL_PREFIX=/usr/local -DBUILD_NEW_PYTHON_SUPPORT=ON -DBUILD_EXAMPLES=ON ..
make -j4
sudo make install
sudo cp ~/opencv-3.0.0/3rdparty/ippicv/unpack/ippicv_lnx/lib/intel64/libippicv.a /usr/local/lib
sudo ldconfig
cd ~