如何解决CMake编译OpenCV时opencv_ffmpeg.dll等下载失败

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已于 2025-01-17 15:47:01 修改

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于 2025-01-17 15:46:25 首次发布

一、Configure会报一些红色的警告信息，比如：

1 CMake Warning at cmake/OpenCVDownload.cmake:193 (message):
2 FFMPEG: Download failed: 7;"Couldn't connect to server"
3
4 For details please refer to the download log file:
5
6 D:/study/opencv_with_contrib_test_sln/CMakeDownloadLog.txt
7
8 Call Stack (most recent call first):
9 3rdparty/ffmpeg/ffmpeg.cmake:20 (ocv_download)
10 cmake/OpenCVFindLibsVideo.cmake:200 (download_win_ffmpeg)
11 CMakeLists.txt:636 (include)

提示FFMPEG下载失败，因为无法连接到服务器，打开 CMakeDownloadLog.txt 查看详细信息。

二、打开CMakeDownloadLog.txt

#use_cache "D:/study/opencv-4.0.0/.cache"
#do_copy "opencv_ffmpeg.dll" "849286ccc527c99e5a218b67f13c6e8c" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/759a23e24ab787a0979f8a93103dcc3105ec10c1/ffmpeg/opencv_ffmpeg.dll" "D:/study/opencv_wit