OpenCV 3.1 installation script for Raspberry Pi (Raspbian Jessie)

rpi_opencv_install.sh

#!/bin/bash
# full update
sudo apt-get update
sudo apt-get -y upgrade
sudo rpi-update

# reboot required
read -r -p "You may need to reboot your RPi. Would you like to do that? [y/N] " response
if [[ $response =~ ^([yY][eE][sS]|[yY])$ ]]
then
    sudo reboot
fi

# install build git cmake and some others
sudo apt-get install -y build-essential checkinstall git cmake wget unzip

# ffmpeg dependencies
sudo apt-get install -y 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 libsdl1.2-dev libvpx-dev

# install image codecs
sudo apt-get install -y libjpeg-dev libtiff5-dev libjasper-dev libpng12-dev

# gstreamer
sudo apt-get install -y 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

# install video codecs
sudo apt-get install -y libavcodec-dev libavformat-dev libswscale-dev libv4l-dev v4l-utils
sudo apt-get install -y libxvidcore-dev libx264-dev x264

# GTK to support OpenCV GUI
sudo apt-get install -y libgtk2.0-dev libqt4-dev libqt4-opengl-dev

# matrix operations optimization
sudo apt-get install -y libatlas-base-dev gfortran

# install python 2 and 3 and some python libs with pip
sudo apt-get install -y python2.7-dev python3-dev python-pip
sudo apt-get install -y python-tk python-numpy python3-tk python3-numpy python-qt4

mkdir ~/source
cd ~/source
# ffmpeg from git repo
git clone https://github.com/FFmpeg/FFmpeg.git
cd FFmpeg/
# build ffmpeg
./configure --enable-gpl --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab --enable-shared --enable-libvpx --enable-pic
make
sudo make install
sudo ldconfig -v

# opencv compilation
sudo apt-get autoremove libopencv-dev python-opencv
# download opencv
cd ~/source
wget -O opencv.zip https://github.com/Itseez/opencv/archive/3.1.0.zip
unzip opencv.zip
cd opencv-3.1.0/
mkdir build && cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D WITH_QT=ON -D INSTALL_C_EXAMPLES=OFF ..
make -j $(nproc)
sudo make install
sudo /bin/bash -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf'
sudo ldconfig -v

is it possible to build opencv against ffmpeg from raspbian repositories? thx

is it possible to build opencv against ffmpeg from raspbian repositories? thx

You can, however the precompiled version of ffmpeg is missing a lot of dependencies that are necessary (or you may need them somewhere in future). Therefore I would suggest compiling everything from source. Last but not least, the precompiled versions distributed with Debian are a bit outdated.

Hi, first I want to say thank you for creating such an easy guide for compiling OpenCV with FFmpeg on the Raspberry Pi. I began following your instructions but I had an error when I got to the step
make -j $(nproc)
The error code that I received was this:
/home/pi/source/opencv-3.1.0/modules/videoio/src/cap_ffmpeg_impl.hpp: In member function ‘bool OutputMediaStream_FFMPEG::open(const char*, int, int, double)’: /home/pi/source/opencv-3.1.0/modules/videoio/src/cap_ffmpeg_impl.hpp:2207:41: warning: ignoring return value of ‘int avformat_write_header(AVFormatContext*, AVDictionary**)’, declared with attribute warn_unused_result [-Wunused-result] avformat_write_header(oc_, NULL); ^ modules/videoio/CMakeFiles/opencv_videoio.dir/build.make:206: recipe for target 'modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_ffmpeg.cpp.o' failed make[2]: *** [modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_ffmpeg.cpp.o] Error 1 CMakeFiles/Makefile2:2557: recipe for target 'modules/videoio/CMakeFiles/opencv_videoio.dir/all' failed make[1]: *** [modules/videoio/CMakeFiles/opencv_videoio.dir/all] Error 2 Makefile:160: recipe for target 'all' failed make: *** [all] Error 2

I have a Raspberry Pi 3B+ running the latest version of Raspbian and everything is up to date. I am very confused about how to solve this issue and I would appreciate your help!
Thanks