尝试使用cmake-gui构建'opencv_contrib‘时出错

Question

enter image description here1.我已经从Git repo下载并解压了'opencv_contrib-master‘和'opencv-master’。2.安装了cmake 3.9版本。

当我运行cmake时，我得到以下错误：

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我正在使用Visual Studio 2017和Windows 10。有什么帮助吗？

这是CMAkeDownloadLog.txt ErrorLog的截图

来自ErrorLog：

#use_cache "C:/Downloads/OPENCV/opencv-master/.cache"
#do_copy "opencv_ffmpeg.dll" "b8120c07962d591e2e9071a1bf566fd0" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/0a0e88972a7ea97708378d0488a65f83e7cc5e69/ffmpeg/opencv_ffmpeg.dll" "C:/OpenCV/3rdparty/ffmpeg"
#missing "C:/OpenCV/3rdparty/ffmpeg/opencv_ffmpeg.dll"
#check_md5 "C:/Downloads/OPENCV/opencv-master/.cache/ffmpeg/b8120c07962d591e2e9071a1bf566fd0-opencv_ffmpeg.dll"
#mismatch_md5 "C:/Downloads/OPENCV/opencv-master/.cache/ffmpeg/b8120c07962d591e2e9071a1bf566fd0-opencv_ffmpeg.dll" "d41d8cd98f00b204e9800998ecf8427e"
#delete "C:/Downloads/OPENCV/opencv-master/.cache/ffmpeg/b8120c07962d591e2e9071a1bf566fd0-opencv_ffmpeg.dll"
#cmake_download "C:/Downloads/OPENCV/opencv-master/.cache/ffmpeg/b8120c07962d591e2e9071a1bf566fd0-opencv_ffmpeg.dll" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/0a0e88972a7ea97708378d0488a65f83e7cc5e69/ffmpeg/opencv_ffmpeg.dll"
# timeout on name lookup is not supported
#   Trying 151.101.112.133...
# TCP_NODELAY set
# connect to 151.101.112.133 port 443 failed: Timed out
# Failed to connect to raw.githubusercontent.com port 443: Timed out
# Closing connection 0

Answer 1

正如您可能注意到的，CMake无法连接到提供它需要下载的文件的服务器。很可能是您的网络连接出现了问题。

对我来说，CMake并不知道公司的https代理。CMake通过环境变量HTTP_PROXY和HTTPS_PROXY知道这一点。如果这是您的问题，您可以为您的系统设置这些变量。如果不能在系统范围内设置环境变量，或者只是想要快速测试，请启动命令提示符并运行

set HTTP_PROXY=<your-proxy-here>
set HTTPS_PROXY=<your-proxy-here>
c:\program files\cmake\bin\cmake-gui.exe

如果cmake安装在不同的位置，则cmake的路径可能不同。

如果这不是原因，则说明有其他原因阻塞了您的连接。例如防火墙、恶意软件保护等。