invalid ELF header

[rhockett94]

trafficstars

I'm trying to run a basic script with node darknet, which utilises this opencv module. However while it installs just fine even a basic script won't run. I get this issue:

internal/modules/cjs/loader.js:807 return process.dlopen(module, path.toNamespacedPath(filename)); ^

Error: /mnt/c/Users/Ryan/Documents/rsextract/node_modules/opencv4nodejs/build/Release/opencv4nodejs.node: invalid ELF header

I don't think this is a darknet problem. Does anyone have an idea?

OpenCV version The one that came with npm install -s opencv4nodejs

With OpenCV-contrib? no?

OS: Windows 10 64 bit

[MATTYGILO]

Same problem did you find a solution

[rhockett94]

Same problem did you find a solution

Nope. I'm having difficulties getting it to work even now.

[needfulthing]

I have a similar problem while trying to use the docker image from https://hub.docker.com/r/justadudewhohacks/opencv-nodejs. I found some hints in the net that invalid ELF headers might come from compiling to the wrong architecture...

# node index2.js
/app/opencv/node_modules/opencv4nodejs/lib/cv.js:47
    throw err
    ^

Error: /app/opencv/node_modules/opencv4nodejs/build/Release/opencv4nodejs.node: invalid ELF header
    at Error (native)
    at Object.Module._extensions..node (module.js:597:18)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/app/opencv/node_modules/opencv4nodejs/lib/cv.js:40:8)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)

[needfulthing]

I found the problem in my case: I mistakenly referenced the macOS binaries of the opencv4nodejs module I added locally in the node project (and which were included in the folder I bound to the Docker container). After I referenced the globally installed module of the image, it runs.

[V-kto]

Hello there 👋

I'm trying to use opencv4nodejs in a docker container (FROM amazonlinux:2).

I built opencv manually via a Dockerfile

  # Build opencv
  mkdir /tmp/opencv_build ; \
  cd /tmp/opencv_build ; \
  cmake3 -D CMAKE_BUILD_TYPE:STRING=Release -D BUILD_LIST=core,imgproc,imgcodecs /tmp/opencv ; \
  cmake3 --build . ; \

I copied the /tmp/opencv_build/ in a repo /myNodeProject/

Here is the package.json

"opencv4nodejs": {
  "disableAutoBuild": 1,
  "opencvIncludeDir": "opencv_build/include",
  "opencvLibDir": "opencv_build/lib",
  "opencvBinDir": "opencv_build/bin"
}

I also tried to add a .env

OPENCV_INCLUDE_DIR=opencv_build/include
OPENCV_LIB_DIR=opencv_build/lib
OPENCV_BIN_DIR=opencv_build/bin

But when I run my node function I have this error

Error: /myNodeProject/node_modules/opencv4nodejs/build/Release/opencv4nodejs.node: invalid ELF header
    at Object.Module._extensions..node (node:internal/modules/cjs/loader:1189:18)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at Object.<anonymous> (/myNodeProject/node_modules/opencv4nodejs/lib/cv.js:40:8)
    at Module._compile (node:internal/modules/cjs/loader:1105:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1159:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12) {
  code: 'ERR_DLOPEN_FAILED'
}

@justadudewhohacks @piercus Is it possible that the problem comes from the fact that I installed the node_modules and built my node project on a mac machine ?

[piercus]

@justadudewhohacks @piercus Is it possible that the problem comes from the fact that I installed the node_modules and built my node project on a mac machine ?

Maybe it is related Does autobuilding opencv4nodejs directly from the docker is working ?

Other approach: i suggest you try with version https://www.npmjs.com/package/@u4/opencv4nodejs

If it's not working with @UrielCh's fork, he has been very active on the build recently, and he is looking for feedbacks so he might be able to answer your questions