opencv - OpenCV的内部版本出现错误，这些严重吗？

Question

我是Raspberry Pi的新手(以及命令行构建等)。这是我从构建OpenCV得到的输出:

pi@SamPi:~/opencv-3.1.0/build $ cmake -D CMAKE_BUILD_TYPE=RELEASE \
> -D CMAKE_INSTALL_PREFIX=/usr/local \
> -D INSTALL_PYTHON_EXAMPLES=ON \
> -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib-3.1.0/modules \
> -D BUILD_EXAMPLES=ON ..
-- The CXX compiler identification is GNU 4.9.2
-- The C compiler identification is GNU 4.9.2

-- Performing Test HAVE_CXX_WMISSING_PROTOTYPES
-- Performing Test HAVE_CXX_WMISSING_PROTOTYPES - Failed
-- Performing Test HAVE_CXX_WSTRICT_PROTOTYPES
-- Performing Test HAVE_CXX_WSTRICT_PROTOTYPES - Failed
-- Performing Test HAVE_C_WSIGN_PROMO
-- Performing Test HAVE_C_WSIGN_PROMO - Failed
-- Performing Test HAVE_C_WNO_DELETE_NON_VIRTUAL_DTOR
-- Performing Test HAVE_C_WNO_DELETE_NON_VIRTUAL_DTOR - Failed
-- Performing Test HAVE_CXX_WNO_UNNAMED_TYPE_TEMPLATE_ARGS
-- Performing Test HAVE_CXX_WNO_UNNAMED_TYPE_TEMPLATE_ARGS - Failed
-- Performing Test HAVE_C_WNO_UNNAMED_TYPE_TEMPLATE_ARGS
-- Performing Test HAVE_C_WNO_UNNAMED_TYPE_TEMPLATE_ARGS - Failed
-- Performing Test HAVE_C_FVISIBILITY_INLINES_HIDDEN
-- Performing Test HAVE_C_FVISIBILITY_INLINES_HIDDEN - Failed

-- Looking for io.h
-- Looking for io.h - not found
-- Looking for jbg_newlen
-- Looking for jbg_newlen - not found

-- Looking for sys/videoio.h
-- Looking for sys/videoio.h - not found

-- Looking for ffmpeg/avformat.h
-- Looking for ffmpeg/avformat.h - not found
-- Checking for module 'libgphoto2'
--   No package 'libgphoto2' found
-- Could NOT find Doxygen (missing:  DOXYGEN_EXECUTABLE) 
-- To enable PlantUML support, set PLANTUML_JAR environment variable or pass -DPLANTUML_JAR=<filepath> option to cmake

-- Could NOT find JNI (missing:  JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH) 
-- 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) 
-- VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file
-- Caffe:   NO
-- Protobuf:   NO
-- Glog:   NO
-- Could NOT find HDF5 (missing:  HDF5_LIBRARIES HDF5_INCLUDE_DIRS HDF5_HL_LIBRARIES) 
-- Checking SFM deps... FALSE
-- Module opencv_sfm disabled because the following dependencies are not found: Eigen Glog/Gflags
-- Tesseract:   NO

-- Performing Test HAVE_CXX_WNO_MISSING_PROTOTYPES
-- Performing Test HAVE_CXX_WNO_MISSING_PROTOTYPES - Failed

-- Performing Test HAVE_CXX_WNO_TAUTOLOGICAL_UNDEFINED_COMPARE
-- Performing Test HAVE_CXX_WNO_TAUTOLOGICAL_UNDEFINED_COMPARE - Failed
-- Tesseract:   NO
-- 
-- General configuration for OpenCV 3.1.0 =====================================
--   Version control:               unknown
-- 
--   Platform:
--     Host:                        Linux 4.9.35-v7+ armv7l
--     CMake:                       3.6.2
--     CMake generator:             Unix Makefiles
--     CMake build tool:            /usr/bin/make
--     Configuration:               RELEASE
-- 
--   C/C++:
--     Built as dynamic libs?:      YES
--     C++ Compiler:                /usr/bin/c++  (ver 4.9.2)
--     C++ flags (Release):         -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG  -DNDEBUG
--     C++ flags (Debug):           -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -g  -O0 -DDEBUG -D_DEBUG
--     C Compiler:                  /usr/bin/cc
--     C flags (Release):           -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fvisibility=hidden -O3 -DNDEBUG  -DNDEBUG
--     C flags (Debug):             -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fvisibility=hidden -g  -O0 -DDEBUG -D_DEBUG
--     Linker flags (Release):
--     Linker flags (Debug):
--     Precompiled headers:         YES
--     Extra dependencies:          /usr/lib/arm-linux-gnueabihf/libpng.so /usr/lib/arm-linux-gnueabihf/libz.so gtk-x11-2.0 gdk-x11-2.0 pangocairo-1.0 atk-1.0 cairo gdk_pixbuf-2.0 gio-2.0 pangoft2-1.0 pango-1.0 gobject-2.0 fontconfig freetype gthread-2.0 glib-2.0 v4l1 v4l2 avcodec avformat avutil swscale avresample dl m pthread rt
--     3rdparty dependencies:       libjpeg libwebp libtiff libjasper IlmImf libprotobuf
-- 
--   OpenCV modules:
--     To be built:                 core flann imgproc ml photo reg surface_matching video dnn fuzzy imgcodecs shape videoio highgui objdetect plot superres ts xobjdetect xphoto bgsegm bioinspired dpm face features2d line_descriptor saliency text calib3d ccalib datasets rgbd stereo structured_light tracking videostab xfeatures2d ximgproc aruco optflow stitching python2 python3
--     Disabled:                    world contrib_world
--     Disabled by dependency:      -
--     Unavailable:                 cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev java viz cvv hdf matlab sfm
-- 
--   GUI: 
--     QT:                          NO
--     GTK+ 2.x:                    YES (ver 2.24.25)
--     GThread :                    YES (ver 2.42.1)
--     GtkGlExt:                    NO
--     OpenGL support:              NO
--     VTK support:                 NO
-- 
--   Media I/O: 
--     ZLib:                        /usr/lib/arm-linux-gnueabihf/libz.so (ver 1.2.8)
--     JPEG:                        libjpeg (ver 90)
--     WEBP:                        build (ver 0.3.1)
--     PNG:                         /usr/lib/arm-linux-gnueabihf/libpng.so (ver 1.2.50)
--     TIFF:                        build (ver 42 - 4.0.2)
--     JPEG 2000:                   build (ver 1.900.1)
--     OpenEXR:                     build (ver 1.7.1)
--     GDAL:                        NO
-- 
--   Video I/O:
--     DC1394 1.x:                  NO
--     DC1394 2.x:                  NO
--     FFMPEG:                      YES
--       codec:                     YES (ver 56.1.0)
--       format:                    YES (ver 56.1.0)
--       util:                      YES (ver 54.3.0)
--       swscale:                   YES (ver 3.0.0)
--       resample:                  YES (ver 2.1.0)
--       gentoo-style:              YES
--     GStreamer:                   NO
--     OpenNI:                      NO
--     OpenNI PrimeSensor Modules:  NO
--     OpenNI2:                     NO
--     PvAPI:                       NO
--     GigEVisionSDK:               NO
--     UniCap:                      NO
--     UniCap ucil:                 NO
--     V4L/V4L2:                    Using libv4l1 (ver 1.6.0) / libv4l2 (ver 1.6.0)
--     XIMEA:                       NO
--     Xine:                        NO
--     gPhoto2:                     NO
-- 
--   Parallel framework:            pthreads
-- 
--   Other third-party libraries:
--     Use IPP:                     NO
--     Use VA:                      NO
--     Use Intel VA-API/OpenCL:     NO
--     Use Eigen:                   NO
--     Use Cuda:                    NO
--     Use OpenCL:                  YES
--     Use custom HAL:              NO
-- 
--   OpenCL:
--     Version:                     dynamic
--     Include path:                /home/pi/opencv-3.1.0/3rdparty/include/opencl/1.2
--     Use AMDFFT:                  NO
--     Use AMDBLAS:                 NO
-- 
--   Python 2:
--     Interpreter:                 /usr/bin/python2.7 (ver 2.7.9)
--     Libraries:                   /usr/lib/arm-linux-gnueabihf/libpython2.7.so (ver 2.7.9)
--     numpy:                       /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.8.2)
--     packages path:               lib/python2.7/dist-packages
-- 
--   Python 3:
--     Interpreter:                 /usr/bin/python3.4 (ver 3.4.2)
--     Libraries:                   /usr/lib/arm-linux-gnueabihf/libpython3.4m.so (ver 3.4.2)
--     numpy:                       /usr/lib/python3/dist-packages/numpy/core/include (ver 1.8.2)
--     packages path:               lib/python3.4/dist-packages
-- 
--   Python (for build):            /usr/bin/python2.7
-- 
--   Java:
--     ant:                         NO
--     JNI:                         NO
--     Java wrappers:               NO
--     Java tests:                  NO
-- 
--   Matlab:                        Matlab not found or implicitly disabled
-- 
--   Documentation:
--     Doxygen:                     NO
--     PlantUML:                    NO
-- 
--   Tests and samples:
--     Tests:                       YES
--     Performance tests:           YES
--     C/C++ Examples:              YES
-- 
--   Install path:                  /usr/local
-- 
--   cvconfig.h is in:              /home/pi/opencv-3.1.0/build
-- -----------------------------------------------------------------
-- 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/pi/opencv-3.1.0/build

这些错误很多似乎很奇怪，因为我专门为此安装进行了1.5小时的下载和升级文件(请参见教程)

https://www.pyimagesearch.com/2016/04/18/install-guide-raspberry-pi-3-raspbian-jessie-opencv-3/

可以肯定的是，我下载了Java，但显示缺少。而且我下载了很多图像文件格式的东西，但是却说我似乎缺少基本的videoio，甚至只是普通的io!这是怎么回事？我已经进行了制作，是否可以稍后将这些丢失的文件放入OpenCV？

Answer 1

您需要进行虚拟环境重启
$ mkvirtualenv cv -p python2