opencv编译报错
CMakeDownloadLog.txt
#use_cache "D:/opencv/.cache"
#do_unpack "ippicv_2021.8_win_intel64_20230330_general.zip" "71e4f58de939f0348ec7fb58ffb17dbf" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/1224f78da6684df04397ac0f40c961ed37f79ccb/ippicv/ippicv_2021.8_win_intel64_20230330_general.zip" "D:/opencv/build/3rdparty/ippicv"
#check_md5 "D:/opencv/.cache/ippicv/71e4f58de939f0348ec7fb58ffb17dbf-ippicv_2021.8_win_intel64_20230330_general.zip"
#mismatch_md5 "D:/opencv/.cache/ippicv/71e4f58de939f0348ec7fb58ffb17dbf-ippicv_2021.8_win_intel64_20230330_general.zip" "d41d8cd98f00b204e9800998ecf8427e"
#delete "D:/opencv/.cache/ippicv/71e4f58de939f0348ec7fb58ffb17dbf-ippicv_2021.8_win_intel64_20230330_general.zip"
#cmake_download "D:/opencv/.cache/ippicv/71e4f58de939f0348ec7fb58ffb17dbf-ippicv_2021.8_win_intel64_20230330_general.zip" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/1224f78da6684df04397ac0f40c961ed37f79ccb/ippicv/ippicv_2021.8_win_intel64_20230330_general.zip"#try 1
# timeout on name lookup is not supported
# getaddrinfo(3) failed for raw.githubusercontent.com:443
# Could not resolve host: raw.githubusercontent.com
# Closing connection
##do_unpack "v0.1.2a.zip" "fa4b3e25167319cb0fa9432ef8281945" "https://github.com/opencv/ade/archive/v0.1.2a.zip" "D:/opencv/build/3rdparty/ade"
#check_md5 "D:/opencv/.cache/ade/fa4b3e25167319cb0fa9432ef8281945-v0.1.2a.zip"
#mkdir "D:/opencv/build/3rdparty/ade"
#unpack "D:/opencv/build/3rdparty/ade" "D:/opencv/.cache/ade/fa4b3e25167319cb0fa9432ef8281945-v0.1.2a.zip"
#do_copy "opencv_videoio_ffmpeg.dll" "4aaef1456e282e5ef665d65555f47f56" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/7da61f0695eabf8972a2c302bf1632a3d99fb0d5/ffmpeg/opencv_videoio_ffmpeg.dll" "D:/opencv/build/3rdparty/ffmpeg"
#missing "D:/opencv/build/3rdparty/ffmpeg/opencv_videoio_ffmpeg.dll"
#check_md5 "D:/opencv/.cache/ffmpeg/4aaef1456e282e5ef665d65555f47f56-opencv_videoio_ffmpeg.dll"
#mismatch_md5 "D:/opencv/.cache/ffmpeg/4aaef1456e282e5ef665d65555f47f56-opencv_videoio_ffmpeg.dll" "d41d8cd98f00b204e9800998ecf8427e"
#delete "D:/opencv/.cache/ffmpeg/4aaef1456e282e5ef665d65555f47f56-opencv_videoio_ffmpeg.dll"
#cmake_download "D:/opencv/.cache/ffmpeg/4aaef1456e282e5ef665d65555f47f56-opencv_videoio_ffmpeg.dll" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/7da61f0695eabf8972a2c302bf1632a3d99fb0d5/ffmpeg/opencv_videoio_ffmpeg.dll"
#try 1
# timeout on name lookup is not supported
# getaddrinfo(3) failed for raw.githubusercontent.com:443
# Could not resolve host: raw.githubusercontent.com
# Closing connection
##do_copy "opencv_videoio_ffmpeg_64.dll" "38a638851e064c591ce812e27ed43f1f" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/7da61f0695eabf8972a2c302bf1632a3d99fb0d5/ffmpeg/opencv_videoio_ffmpeg_64.dll" "D:/opencv/build/3rdparty/ffmpeg"
#missing "D:/opencv/build/3rdparty/ffmpeg/opencv_videoio_ffmpeg_64.dll"
#check_md5 "D:/opencv/.cache/ffmpeg/38a638851e064c591ce812e27ed43f1f-opencv_videoio_ffmpeg_64.dll"
#mismatch_md5 "D:/opencv/.cache/ffmpeg/38a638851e064c591ce812e27ed43f1f-opencv_videoio_ffmpeg_64.dll" "d41d8cd98f00b204e9800998ecf8427e"
#delete "D:/opencv/.cache/ffmpeg/38a638851e064c591ce812e27ed43f1f-opencv_videoio_ffmpeg_64.dll"
#cmake_download "D:/opencv/.cache/ffmpeg/38a638851e064c591ce812e27ed43f1f-opencv_videoio_ffmpeg_64.dll" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/7da61f0695eabf8972a2c302bf1632a3d99fb0d5/ffmpeg/opencv_videoio_ffmpeg_64.dll"
#try 1
# timeout on name lookup is not supported
# getaddrinfo(3) failed for raw.githubusercontent.com:443
# Could not resolve host: raw.githubusercontent.com
# Closing connection
#
#do_copy "ffmpeg_version.cmake" "8862c87496e2e8c375965e1277dee1c7" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/7da61f0695eabf8972a2c302bf1632a3d99fb0d5/ffmpeg/ffmpeg_version.cmake" "D:/opencv/build/3rdparty/ffmpeg"
#missing "D:/opencv/build/3rdparty/ffmpeg/ffmpeg_version.cmake"
#check_md5 "D:/opencv/.cache/ffmpeg/8862c87496e2e8c375965e1277dee1c7-ffmpeg_version.cmake"
#mismatch_md5 "D:/opencv/.cache/ffmpeg/8862c87496e2e8c375965e1277dee1c7-ffmpeg_version.cmake" "d41d8cd98f00b204e9800998ecf8427e"
#delete "D:/opencv/.cache/ffmpeg/8862c87496e2e8c375965e1277dee1c7-ffmpeg_version.cmake"
#cmake_download "D:/opencv/.cache/ffmpeg/8862c87496e2e8c375965e1277dee1c7-ffmpeg_version.cmake" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/7da61f0695eabf8972a2c302bf1632a3d99fb0d5/ffmpeg/ffmpeg_version.cmake"
#try 1
# timeout on name lookup is not supported
# getaddrinfo(3) failed for raw.githubusercontent.com:443
# Could not resolve host: raw.githubusercontent.com
# Closing connection
#
问题，如上述已经很清楚，缺什么补什么
1、下载 ippicv_2021.8_win_intel64_20230330_general.zip、v0.1.2a.zip、opencv_videoio_ffmpeg.dll、opencv_videoio_ffmpeg_64.dll、ffmpeg_version.cmake
由于下载源在https://raw.githubusercontent.com，由于网络原因下载不顺畅，可以先找到文件下载到对应文件夹下，或者更改网络环境。
ffmpeg_version.cmake文件，打开后显示如下， 另存即可
资源已上传CSDN，可直接下载。
https://download.csdn.net/download/nownow_/89154249
https://download.csdn.net/download/nownow_/89154223
https://download.csdn.net/download/nownow_/89154217
https://download.csdn.net/download/nownow_/89140838
https://download.csdn.net/download/nownow_/89161391
2、.cache 下的与之对应的文件删除
3、建议更改网络环境，如果上不去对应网站，可参考这篇文章解决
https://mp.csdn.net/mp_blog/creation/editor/137785429
