Package: opencv4:x64-windows Vcpkg version: 2021-08-03-1a6d67b8150e94b7f473c6ab1c0cfdd794316a64

[avre10]

Host Environment

• OS: [Windows]

Failure logs
CMake Error at D:/vcpkg/buildtrees/opencv4/src/4.5.2-755f235ba0.clean/cmake/OpenCVDownload.cmake:161 (message):
Downloads are not permitted during configure. Please pre-download the file "D:/vcpkg/downloads/opencv-cache/nvidia_optical_flow/a73cd48b18dcc0cc8933b30796074191-edb50da3cf849840d680249aa6dbef248ebce2ca.zip":

  vcpkg_download_distfile(OCV_DOWNLOAD
      URLS "https://github.com/NVIDIA/NVIDIAOpticalFlowSDK/archive/edb50da3cf849840d680249aa6dbef248ebce2ca.zip"
      FILENAME "opencv-cache/nvidia_optical_flow/a73cd48b18dcc0cc8933b30796074191-edb50da3cf849840d680249aa6dbef248ebce2ca.zip"
      SHA512 0
  )

Call Stack (most recent call first):
D:/vcpkg/buildtrees/opencv4/src/4.5.2-58c4f07550.clean/modules/cudaoptflow/CMakeLists.txt:15 (ocv_download)

Additional context
Building Package: opencv4:x64-windows
Vcpkg version: 2021-08-03-1a6d67b8150e94b7f473c6ab1c0cfdd794316a64

[NancyLi1013]

@cenit

Could you please help take a look what's wrong here? Thanks.

[cenit]

it is already fixed in #18827, but that PR is waiting for another pr to be merged.
time is passing fast and opencv will soon have another release, and here on vcpkg we are still stuck on the older one and with download errors

[NancyLi1013]

Thanks for your information. @cenit

Yes, there are always something blocks the progress of PR.

[avre10]

Any solution now apart of waiting?

[cenit]

manually modifying the portfile at line

vcpkg/ports/opencv4/portfile.cmake

Lines 120 to 124 in 63aa65e

	vcpkg_download_distfile(OCV_DOWNLOAD
	URLS "https://github.com/NVIDIA/NVIDIAOpticalFlowSDK/archive/79c6cee80a2df9a196f20afd6b598a9810964c32.zip"
	FILENAME "opencv-cache/nvidia_optical_flow/ca5acedee6cb45d0ec610a6732de5c15-79c6cee80a2df9a196f20afd6b598a9810964c32.zip"
	SHA512 d80cdedec588dafaad4ebb8615349f842ecdc64d3ca9480fee7086d606e6f2362606a9a2ce273c5cf507be2840ec24bbcbe32c2962672c3bcfb72d31428ef73d
	)

with the message above

vcpkg_download_distfile(OCV_DOWNLOAD
      URLS "https://github.com/NVIDIA/NVIDIAOpticalFlowSDK/archive/edb50da3cf849840d680249aa6dbef248ebce2ca.zip"
      FILENAME "opencv-cache/nvidia_optical_flow/a73cd48b18dcc0cc8933b30796074191-edb50da3cf849840d680249aa6dbef248ebce2ca.zip"
      SHA512 0
  )

note that sha512 is zero and so you will need to apply another correction, changing 0 to the proper value which vcpkg will give to you after relaunching install

[avre10]

Thanks. Solution works.

[NancyLi1013]

Please keep this issue open until it is fixed.

[PhoebeHui]

@avre10, this issue has been fixed, please get latest source and try again.