ubuntu下opencv2.4.9/3.0/3.1安装过程_linux教程_开发教程

安装OpenCv后出现各种问题，究其原因是一些基础库没有安装好，以下是基础库安装步骤，保证尽量完整，免得在使用的时候出错。

			
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							apt-get remove ffmpeg x264 libx264-dev

			
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							apt-get update
					
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							apt-get install build-essential checkinstall Git cmake libfaac-dev 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

			
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							apt-get install 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 gstreamer0.10-ffmpeg

如果 gstreamer0.10-ffmpeg提示没有候选，那么手动下载并安装，或者按如下步骤安装

			
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							apt-get install libgstreamer0.10-dev gstreamer-tools gstreamer0.10-tools gstreamer0.10-doc
					
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							apt-get install gstreamer0.10-plugins-base gstreamer0.10-plugins-good gstreamer0.10-plugins-ugly gstreamer0.10-plugins-bad gstreamer0.10-plugins-bad-multiverse

所有您需要做的就是添加PPA到您的系统，更新本地存储索引和安装gstreamero.10-ffmpeg包。如下输入命令：

			
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							add-apt-repository ppa:mc3man/trusty-media
					
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							apt-get update
					
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							apt-get install gstreamer0.10-ffmpeg

			
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							apt-get install libgtk2.0-0 libgtk2.0-dev
					
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							apt-get install libjpeg8 libjpeg8-dev

下载链接： ftp://ftp.videolan.org/pub/videolan/x264/snapshots

			
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							tar xvf x264-snapshot-**********-stable.tar.bz2
					
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							cd x264-snapshot--**********--stable
					
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							./configure --enable-shared --enable-pic
					
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							make
					
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							 make install

由于我的电脑是64位,所以要加上 –enable-shared –enable-pic ,否则就会报错:

			
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							/usr/bin/ld: /usr/local/lib/libavcodec.a(avpacket.o): relocation R_X86_64_32S against `av_destruct_packet' can not be used when making a shared object; recompile with -fPIC
					
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							/usr/local/lib/libavcodec.a: could not read symbols: Bad value

如果出现下面错误：

			
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							/usr/local/lib/libswscale.a(swscale_unscaled.o): relocation R_X86_64_32S against `av_pix_fmt_descriptors@@LIBAVUTIL_52' can not be used when making a shared object; recompile with -fPIC
					
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							/usr/local/lib/libswscale.a: error adding symbols: 错误的值
					
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							collect2: error: ld returned 1 exit status
					
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							make[2]: *** [lib/libopencv_highgui.so.2.4.9] 错误 1
					
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							make[1]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/all] 错误 2
					
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							make: *** [all] 错误 2

可能是opencv249依赖的ffmpeg版本不对照

			
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							wget http://ffmpeg.org/releases/ffmpeg-1.2.tar.bz2
					
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							tar xvf ffmpeg-1.2.tar.bz2
					
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							cd ffmpeg-1.2
					
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							./configure --enable-gpl --enable-libfaac --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-pic
					
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							make
					
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							make install

报错:dvb-v5.h:69:9: error: ‘NULL’ undeclared here ……..原因是v4l的版本不对,于是我装了v4l 1.0.0

			
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							wget http://www.linuxtv.org/downloads/v4l-utils/v4l-utils-1.0.0.tar.bz2
					
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							tar xvf v4l-utils-1.0.0.tar.bz2
					
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							cd v4l-utils1.0.0
					
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							make
					
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							make install

			
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							tar xvf OpenCV-2.4.9.tar.bz2
					
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							cd OpenCV-2.4.9/
					
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							mkdir build
					
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							cd build
					
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							cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D WITH_V4L=ON -D WITH_QT=ON -D WITH_OPENGL=ON ..
					
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							make
					
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							make install

环境变量中添加

			
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							export LD_LIBRARY_PATH=/usr/local/lib

另外修改

			
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							sudo vi /etc/ld.so.conf.d/opencv.conf

追加 /usr/local/lib
执行

			
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							sudo ldconfig /etc/ld.so.conf

在/etc/bash.bashrc添加

			
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							PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
					
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							export PKG_CONFIG_PATH

最后查看版本和头文件目录

			
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							pkg-config --modversion opencv
					
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							pkg-config --cflags opencv

1.由于opencv的cmakelist里依赖一些库,所有要先配置好这些库,先去除你电脑上的这些重新装.
2.安装其他依赖库.
3.安装gstreamer,主要是opencv里头的相机模块用到
4.安装gtk，jpeg8
5.安装 install x264.
6.安装ffmpeg
7.安装v4l (video for linux) , http://www.linuxtv.org/downloads/v4l-utils/.
8.安装OpenCV 2.4.9.

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