Build error Open CV3.2 with Extra Libs.

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asked 2017-05-12 04:38:51 -0600

Hi all, I have a problem to build OpenCV with Extra Libs.

OS: Win 7 OpenCV: 3.2 Compile: VS2013

After set path of extra modules in OPENCV_EXTRA_MODULES_PATH, click "configure" The error messages are shown and stopped.

*CMake Error at cmake/OpenCVUtils.cmake:1043 (file): file DOWNLOAD cannot open file for write. Call Stack (most recent call first): opencv_contrib/modules/dnn/cmake/OpenCVFindLibProtobuf.cmake:32 (ocv_download) opencv_contrib/modules/dnn/CMakeLists.txt:5 (include)

CMake Error at cmake/OpenCVUtils.cmake:1047 (message): Failed to download . Status= Call Stack (most recent call first): opencv_contrib/modules/dnn/cmake/OpenCVFindLibProtobuf.cmake:32 (ocv_download) opencv_contrib/modules/dnn/CMakeLists.txt:5 (include)*

Any idea? Images are attached for your reference. image description

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with a screen I have to copy myself your error message : "file download cannot open file for write" cmake cannot save file . check your install ....

LBerger ( 2017-05-12 07:15:25 -0600 )edit

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answered 2017-05-12 08:37:39 -0600

TMiranda
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In fact, I was having the same problem. As mentioned before, it appears that OPENCV cannot download extra modules. I've solved it for protobuff by downloading remotely from their github, but you will find more errors on the way, probably.

My tip is: uncheck all unnecessary contrib modules. That will minimize the errors. Another option is trying to change the opencv installation location, but I don't know if that's going to work.

I'm using Ubuntu 16.04 and I'm currently with the same errors.

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As soon as you download and configure protobuff, the Protobuf_LIBS will be updated with the currently installated location on your machine

TMiranda ( 2017-05-12 08:41:50 -0600 )edit

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answered 2017-05-12 08:38:44 -0600

mshabunin
1927 ●10 ●31

You have to use same version of opencv and opencv_contrib repositories. Both should be synced either to 3.2.0 tag, either to master branch.

After updating cmake scripts, you have to make a clean build (with empty build directory).

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What do you mean by updating cmake scripts?

TMiranda ( 2017-05-12 08:46:13 -0600 )edit

For example when you run git checkout, many files in repository will be updated, including cmake scripts.

mshabunin ( 2017-05-12 08:49:43 -0600 )edit

Yep, you're right. I've just downloaded opencv-3.2.0-rc and opencv_contrib-3.2.0-rc and everything has been configurated and installed just fine.

TMiranda ( 2017-05-12 10:02:09 -0600 )edit

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answered 2017-05-12 07:08:59 -0600

kbarni

4134 ●1 ●13 ●49

If you don't need deep neural networks with Caffe support, just uncheck BUILD_PROTOBUF (and the DNN related stuff). The error message shows that it tried to download the Protobuf sources for local build, but it didn't succeed.

If you need DNN, it's probably better to install Protobuf and Caffe separately before building OpenCV. I had similar issues while trying to build OpenCV on Windows with DNN.

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No problem with dnn and windows.

LBerger ( 2017-05-12 07:13:11 -0600 )edit

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Build error Open CV3.2 with Extra Libs.

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