CentoOS 6.4 安装OpenCV2.4.7

其中包含ffmpeg和v4l2。什要要先套件呢？
因opencv 在使用取影像案和相取就需要以上套件
如果安opencv在影片或者相入不能用。如果你得所，那就跳安ffmpeg和v4l2

以下是依照序的，有些步在的候可能漏掉，多包涵

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注意安前需要先gcc, g++, autoconf, cmake, pkgconfig
可以使用

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最後透yum安v4l2
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tar jxvf opencv-2.4.7.tar.bz2cd opencv-2.4.7mkdir buildcd buildcmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_PYTHON_SUPPORT=ON ..
?你要看到ffmpeg和v4l2是On如果看到，查上面有有步少了
然後最後生Makefile。如果看到Makefile生息也是了
make
make install
恭喜你安成功
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你打pkg-config --cflags --libs opencv
 你看到
 -I/usr/local/include/opencv -I/usr/local/include ?/usr/local/lib/libopencv_calib3d.so /usr/local/lib/libopencv_contrib.so /usr/local/lib/libopencv_core.so /usr/local/lib/libopencv_features2d.so /usr/local/lib/libopencv_flann.so /usr/local/lib/libopencv_gpu.so /usr/local/lib/libopencv_highgui.so /usr/local/lib/libopencv_imgproc.so /usr/local/lib/libopencv_legacy.so /usr/local/lib/libopencv_ml.so /usr/local/lib/libopencv_nonfree.so /usr/local/lib/libopencv_objdetect.so /usr/local/lib/libopencv_photo.so /usr/local/lib/libopencv_stitching.so /usr/local/lib/libopencv_ts.so /usr/local/lib/libopencv_video.so /usr/local/lib/libopencv_videostab.so

 程式可以直接在gcc後面加入 `pkg-config --cflags ?opencv`
 e.g.
gcc -c test?`pkg-config --cflags ?opencv` -o test.o
gcc test.o -o foo?`pkg-config --libs opencv`
 注意`是在上esc下面那，不是冒右那
 在`XXXX`表示行shell指令後回的值，它自替掉上面一大串的指令行果