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12.04附带的Opencv版本是否支持v4l2？

tag-icon • tag-icon 12.04 opencv
12.04附带的Opencv版本是否支持v4l2？

我如何知道 Ubuntu 12.04 附带的 OpenCV 版本是否支持 v4l2 设备？我发现许多（较旧的）页面都说 OpenCV 确实支持 v4l2，但我不清楚安装在我的 12.04 机器上的版本是否使用适当的选项进行编译以启用此功能。

不用说，我很难使用 openCV 的 python 绑定从 v4l2 相机捕获图像。我试图找出问题所在。

答案1

不行！你必须自己构建支持 v4l 的 OpenCV。

脚本（将其保存为opencv2_4_5.sh，使其可执行并运行它）（在中间某处包含 v4l）（该站点上提供其他版本）。

arch=$(uname -m)
if [ "$arch" == "i686" -o "$arch" == "i386" -o "$arch" == "i486" -o "$arch" == "i586" ]; then
flag=1
else
flag=0
fi
echo "Installing OpenCV 2.4.5"
mkdir OpenCV
cd OpenCV
echo "Removing any pre-installed ffmpeg and x264"
sudo apt-get -y remove ffmpeg x264 libx264-dev
echo "Installing Dependenices"
sudo apt-get -y install libopencv-dev
sudo apt-get -y install build-essential checkinstall cmake pkg-config yasm
sudo apt-get -y install libtiff4-dev libjpeg-dev libjasper-dev
sudo apt-get -y install libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev libxine-dev libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev libv4l-dev
sudo apt-get -y install python-dev python-numpy
sudo apt-get -y install libtbb-dev
sudo apt-get -y install libqt4-dev libgtk2.0-dev
sudo apt-get -y install libfaac-dev libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev libtheora-dev libvorbis-dev libxvidcore-dev
sudo apt-get -y install x264 v4l-utils ffmpeg
echo "Downloading OpenCV 2.4.5"
wget -O OpenCV-2.4.5.tar.gz http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.5/opencv-2.4.5.tar.gz/download
echo "Installing OpenCV 2.4.5"
tar -xvf OpenCV-2.4.5.tar.gz
cd opencv-2.4.5
mkdir build
cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -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 ..
make -j4
sudo make install
sudo sh -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf'
sudo ldconfig
echo "OpenCV 2.4.5 ready to be used"

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