Install OpenCV 3.1.0 on Ubuntu 12.04

install-opencv-3.1.0.md

Follow http://www.ozbotz.org/opencv-installation/ and http://www.pyimagesearch.com/2015/06/22/install-opencv-3-0-and-python-2-7-on-ubuntu/

Install dependencies

I downloaded the latest versions of ffmpeg, v4l and x264 libs

• ffmpeg-3.1.3.tar.bz2
• v4l-utils-1.10.1.tar.bz2
• x264-snapshot-20160910-2245-stable.tar.bz2

OpenCV when compiled with default libgphoto2 installed on Ubuntu 12.04 gives error. As described here

The same problem is also discussed on this SO question.

Solution: Manually compile and install gphoto2 and libgphoto2. Download gphoto and libgphoto2 from here

• gphoto2-2.5.10.tar.bz2
• libgphoto2-2.5.10.tar.bz2

Install OpenCV and OpenCV contrib packages

Download opencv and opencv_contrib packages

• opencv-3.1.0.tar.gz
• opencv_contrib-3.1.0.tar.gz

tar xvzf opencv-3.1.0.tar.gz
tar xvzf opencv_contrib-3.1.0.tar.gz
cd opencv-3.1.0
mkdir build && cd build

Run cmake to configure and generate makefile. I configured to compile opencv without hdf module. Because the default libhdf5 gives error. This can probably be fixed by installing latest libhdf5 from source but I didn't try.

cmake -D CMAKE_BUILD_TYPE=RELEASE \
  -D CMAKE_INSTALL_PREFIX=/usr/local \
  -D INSTALL_C_EXAMPLES=ON \
  -D INSTALL_PYTHON_EXAMPLES=ON \
# change below directory to where you have extracted opencv contrib zipped file
  -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-3.1.0/modules/ \ 
  -D BUILD_EXAMPLES=ON \
  -D WITH_CUDA=OFF \ # I installed without Cuda. Remove this if you want to compile cuda modules
  -D BUILD_opencv_hdf=OFF \
  ..

If linux/videodev2.h and linux/videodev.h not found

sudo apt-get install libv4l-dev
cd /usr/include/linux
sudo ln -s ../libv4l1-videodev.h videodev.h

If cmake gives following error:

CMake Error at samples/gpu/CMakeLists.txt:100 (list):
  list sub-command REMOVE_ITEM requires list to be present

There are two ways to resolve this error:

1. run cmake with INSTALL_C_EXAMPLES=OFF
2. edit line#100 of samples/gpu/CMakeLists.txt from list(REMOVE_ITEM all_samples "opengl.cpp") to list(REMOVE_ITEM install_list "opengl.cpp")

This was a bug in opencv-3.1.0. It was discussed in issue 5851 and fixed in this commit. You can check that the same change was made in the commit too.

Now we can run cmake with INSTALL_C_EXAMPLES=ON

cmake -D CMAKE_BUILD_TYPE=RELEASE \
  -D CMAKE_INSTALL_PREFIX=/usr/local \
  -D INSTALL_C_EXAMPLES=ON \
  -D INSTALL_PYTHON_EXAMPLES=ON \
# change below directory to where you have extracted opencv contrib zipped file
  -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-3.1.0/modules/ \ 
  -D BUILD_EXAMPLES=ON \
  -D WITH_CUDA=OFF \ # I installed without Cuda. Remove this if you want to compile cuda modules
  -D BUILD_opencv_hdf=OFF \
  ..

make -j4
sudo make install

To remove warning - "libdc1394 error: Failed to initialize libdc1394"

1. source: http://stackoverflow.com/q/29274638/925216
2. source: http://stackoverflow.com/q/12689304/925216

sudo ln /dev/null /dev/raw1394

or - source: http://stackoverflow.com/a/39541989/925216

CMAKE with -D WITH_1394=OFF

While installing opencv 3.1.0 on Ubuntu 16.04 with hdf5 support:
Modify the file /opencv_contrib-3.1.0/modules/hdf/include/opencv2/hdf/hdf5.hpp in line 40:

--- #include
+++ #include "/usr/include/hdf5/serial/hdf5.h"

source

Hi, can you help me for two questions about installing opencv:

1. how to set the OpenCV libraries "Path" as "/usr/lib/"?
2. how to set the OpenCV header files. "Path" as "/usr/include/opencv"?