opencv3.4.0在ubuntu16.04上的安装_linux 安装 videodev2.h

这几天在学习pytorch，要用到opencv，所以重新安装了一下。

首先下载opencv3.4.0，直接去官网下就好了，解压。首先要切换到root用户。
# mkdir build
# cd build
# cmake -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 ..
报错，Could not find a package configuration file provided by "Qt5Core" with any，这个原因是机器上同时撞了qt4和qt5的原因，安装一个qt5-default就可以
# apt-get install git build-essential qt5-default
这样可以配置成功，但实际上一路还是报了很多警告，有很多东西都没有，这个就是缺啥装啥
Looking for ccache - not found
# apt install ccache
Could NOT find Jasper (missing:  JASPER_LIBRARIES JASPER_INCLUDE_DIR)
---这个没有搞定
Looking for linux/videodev.h - not found
# apt-get install libv4l-dev
# updatedb && locate videodev.h
# ln -s /usr/include/libv4l1-videodev.h /usr/include/linux/videodev.h
Looking for sys/videoio.h - not found
---这个也没有搞定，软链接建不起来，不过有人说没有关系，所以不搞了
No package 'libavresample' found
# apt-get install libavresample-dev
No package 'libgphoto2' found
# apt-get install libgphoto2-dev
Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off
# apt install libopenblas-base libopenblas-dev
LAPACK(OpenBLAS): CBLAS/LAPACK headers are not found in '/usr/include'
---这个要查cmake文件看CBLAS/LAPACK是啥东东了，clapack.h这个文件是有的，cblas是blas语言的c语言借口，貌似没什么用，先不管
Could NOT find Atlas (missing:  Atlas_CLAPACK_INCLUDE_DIR)
---和上面差不多，先不管
Could NOT find Doxygen (missing:  DOXYGEN_EXECUTABLE)
# apt install doxygen
Could NOT find JNI (missing:  JAVA_INCLUDE_PATH 
这个貌似是jdk还没有装，汗
# apt install openjdk-8-jdk
Could NOT find Pylint (missing:  PYLINT_EXECUTABLE)
# apt install pylint
Could NOT find Matlab (missing:  MATLAB_MEX_SCRIPT MATLAB_INCLUDE_DIRS MATLAB_ROOT_DIR MATLAB_LIBRARIES MATLAB_LIBRARY_DIRS MATLAB_MEXEXT MATLAB_ARCH MATLAB_BIN)
---这个也没搞定，估计要装个matlab的破解版，不过有了pytorch，还要matlab干什么
VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file
# apt install libvtk6-dev
ok，再次cmake一下，这次大部分东西都有了。
OpenCV modules:
--     To be built:                 calib3d core dnn features2d flann highgui imgcodecs imgproc java ml objdetect photo python3 python_bindings_generator shape stitching superres ts video videoio videostab viz
--     Disabled:                    js world
--     Disabled by dependency:      -
--     Unavailable:                 cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev python2
--     Applications:                tests perf_tests examples apps
--     Documentation:               YES (/usr/bin/doxygen 1.8.13)
--     Non-free algorithms:         NO
--
--   GUI:
--     QT:                          YES (ver 5.7.1)
--       QT OpenGL support:         YES (Qt5::OpenGL 5.7.1)
--     GTK+:                        NO
--     OpenGL support:              YES (/usr/lib/x86_64-linux-gnu/libGLU.so /usr/lib/x86_64-linux-gnu/libGL.so)
--     VTK support:                 YES (ver 6.3.0)
--
--   Media I/O:
--     ZLib:                        /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.8)
--     JPEG:                        /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
--     WEBP:                        /usr/lib/x86_64-linux-gnu/libwebp.so (ver encoder: 0x0209)
--     PNG:                         /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.6.28)
--     TIFF:                        /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 / 4.0.8)
--     JPEG 2000:                   build (ver 1.900.1)
--     OpenEXR:                     /usr/lib/x86_64-linux-gnu/libImath.so /usr/lib/x86_64-linux-gnu/libIlmImf.so /usr/lib/x86_64-linux-gnu/libIex.so /usr/lib/x86_64-linux-gnu/libHalf.so /usr/lib/x86_64-linux-gnu/libIlmThread.so (ver 2.2.0)
--
--   Video I/O:
--     DC1394:                      YES (ver 2.2.5)
--     FFMPEG:                      YES
--       avcodec:                   YES (ver 57.64.101)
--       avformat:                  YES (ver 57.56.101)
--       avutil:                    YES (ver 55.34.101)
--       swscale:                   YES (ver 4.2.100)
--       avresample:                YES (ver 3.1.0)
--     GStreamer:                  
--       base:                      YES (ver 1.10.4)
--       video:                     YES (ver 1.10.4)
--       app:                       YES (ver 1.10.4)
--       riff:                      YES (ver 1.10.4)
--       pbutils:                   YES (ver 1.10.4)
--     libv4l/libv4l2:              NO
--     v4l/v4l2:                    linux/videodev.h linux/videodev2.h
--     gPhoto2:                     YES
--
--   Parallel framework:            pthreads
--
--   Trace:                         YES (with Intel ITT)
--
--   Other third-party libraries:
--     Intel IPP:                   2017.0.3 [2017.0.3]
--            at:                   /home/fire/fire/opencv/opencv-3.4.0/build/3rdparty/ippicv/ippicv_lnx
--     Intel IPP IW:                sources (2017.0.3)
--               at:                /home/fire/fire/opencv/opencv-3.4.0/build/3rdparty/ippicv/ippiw_lnx
--     Lapack:                      NO
--     Eigen:                       YES (ver 3.3.2)
--     Custom HAL:                  NO
--
--   NVIDIA CUDA:                   NO
--
--   OpenCL:                        YES (no extra features)
--     Include path:                /home/fire/fire/opencv/opencv-3.4.0/3rdparty/include/opencl/1.2
--     Link libraries:              Dynamic load
--
--   Python 3:
--     Interpreter:                 /usr/bin/python3 (ver 3.5.3)
--     Libraries:                   /usr/lib/x86_64-linux-gnu/libpython3.5m.so (ver 3.5.3)
--     numpy:                       /usr/local/lib/python3.5/dist-packages/numpy/core/include (ver 1.14.0)
--     packages path:               lib/python3.5/dist-packages
--
--   Python (for build):            /usr/bin/python2.7
--     Pylint:                      /usr/bin/pylint (ver: 1.6.5, checks: 113)
--
--   Java:
--     ant:                         /usr/bin/ant (ver 1.9.9)
--     JNI:                         /usr/lib/jvm/java-8-openjdk-amd64/include /usr/lib/jvm/java-8-openjdk-amd64/include/linux /usr/lib/jvm/java-8-openjdk-amd64/include
--     Java wrappers:               YES
--     Java tests:                  YES
--
--   Matlab:                        NO
--
--   Install to:                    /usr/local
-- -----------------------------------------------------------------
--
-- Configuring done
-- Generating done
-- Build files have been written to: /home/fire/fire/opencv/opencv-3.4.0/build
接下去就是make了
# make
# make install
make过程很长，就先结束本文吧。