opencv4nodejs: new Error('library dir does not exist: ' + libDir)

Hello, I have been trying to install opencv4nodejs on MacOS Mojave with npm i opencv4nodejs and it keeps giving me this error:

npm ERR! code 1
npm ERR! path /Users/u/trr/node_modules/opencv4nodejs
npm ERR! command failed
npm ERR! command sh -c node ./install/install.js
npm ERR! info install using lib dir: /Users/u/trr/node_modules/opencv-build/opencv/build/lib
npm ERR! /Users/u/trr/node_modules/opencv4nodejs/install/install.js:37
npm ERR!   throw new Error('library dir does not exist: ' + libDir)
npm ERR!   ^
npm ERR! 
npm ERR! Error: library dir does not exist: /Users/u/trr/node_modules/opencv-build/opencv/build/lib
npm ERR!     at Object.<anonymous> (/Users/u/trr/node_modules/opencv4nodejs/install/install.js:37:9)
npm ERR!     at Module._compile (node:internal/modules/cjs/loader:1092:14)
npm ERR!     at Object.Module._extensions..js (node:internal/modules/cjs/loader:1121:10)
npm ERR!     at Module.load (node:internal/modules/cjs/loader:972:32)
npm ERR!     at Function.Module._load (node:internal/modules/cjs/loader:813:14)
npm ERR!     at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:76:12)
npm ERR!     at node:internal/main/run_main_module:17:47

Have tried so many things but it just wouldn’t work. Would be great if someone can help me with this.

About this issue

Original URL
State: open
Created 3 years ago
Comments: 15

Most upvoted comments

npm i -g npm@6
npm i opencv4nodejs --save
npm i -g npm@latest

+57

Azperin on May 10, 2021

brew update
brew install opencv@4
brew link --force opencv@4
!!!NOTE!!! Please change the opencv version to fit your installation in step 3. export OPENCV4NODEJS_DISABLE_AUTOBUILD=1 export OPENCV_LIB_DIR=/opt/homebrew/Cellar/opencv/4.5.5_3/lib export OPENCV_BIN_DIR=/opt/homebrew/Cellar/opencv/4.5.5_3/bin export OPENCV_INCLUDE_DIR=/opt/homebrew/Cellar/opencv/4.5.5_3/include/opencv4
npm install -g opencv4nodejs

+17

ShawYN on Feb 20, 2023

Don’t know how it works on Mac. Just install / build plain opencv. Make links in package.json, like mine, but with your paths:

"opencv4nodejs": {
"disableAutoBuild": 1,
"opencvIncludeDir": "R:\\OpenCV\\opencv\\build\\include",
"opencvLibDir": "R:\\OpenCV\\opencv\\build\\x64\\vc15\\lib",
"opencvBinDir": "R:\\OpenCV\\opencv\\build\\x64\\vc15\\bin",
"opencvDir": "R:\\OpenCV\\opencv\\build\\x64\\vc15"
}

Then npm i opencv4nodejs --save

Azperin on May 10, 2021

@74staz You might try this steps: https://github.com/justadudewhohacks/opencv4nodejs/issues/775#issuecomment-804347861

It will help you solve a lot. And then if your OpenCV installation is correct and matched opencv4nodejs version, than it will build fully. But quickly, you can just disable auto build in terminal with : export OPENCV4NODEJS_DISABLE_AUTOBUILD=1. And after you will build it yourself.

KeitelDOG on Mar 23, 2021

3. npm i -g npm@latest

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! opencv-build@0.1.9 install: `node ./install.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the opencv-build@0.1.9 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

64chevy on May 10, 2021

@staz9 then you are very close to it. But you need a bit of easy hacks like I did. First, forget about OpenCV version 4.5.1, that causes the Multitracker error, that has been moved to another directory and that this package did not know about this change.

With version 4.5.0, not Multitracker error, but you’ll get SIFT error for sure in both versions. So as a hack, you will have to comment out 2 or 3 lines of code in modules source code to tell it to ignore the SIFT feature, which is now private and removed. Alternative for SIFT is SURF and 2 others. You will find SURF for sure, not sure for the 2 others. SURF is said to be faster in most use cases. And chances are you’re not even gonna use any of them in your project. I didn’t need their calculation, but SURF is still available.

You can follow this Issue https://github.com/justadudewhohacks/opencv4nodejs/issues/805 , I showed every step you need to do from where you are right now, after Tracking error. And you’ll get it done.

KeitelDOG on May 11, 2021