# Error building wheel for opencv-python from source **URL:** \ **Category:** Python\ **Tags:** gstreamer, build, videoio, apple\ **Created:** [August 15, 2022, 6:22am UTC](https://forum.opencv.org/t/error-building-wheel-for-opencv-python-from-source/9850 "2022-08-15T06:22:33Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![arm2000](https://avatars.discourse-cdn.com/v4/letter/a/51bf81/32.png) [@arm2000](https://forum.opencv.org/u/arm2000)\ **Post date:** [August 15, 2022, 6:22am UTC](https://forum.opencv.org/t/error-building-wheel-for-opencv-python-from-source/9850/1 "2022-08-15T06:22:33Z")
I am trying to build opencv-python with the following environment: ```auto OS: MacOS Monterey 12.5 uname -a: Darwin Darwin Kernel Version 21.6.0 root:xnu-8020.140.41~1/RELEASE_ARM64_T6000 arm64 Python version: Python 3.10.3 Pip version: pip 22.2.2 from .../.pyenv/versions/3.10.3/lib/python3.10/site-packages/pip (python 3.10) ``` After running `pipdeptree -fl`: ```auto cmake==3.24.0 meson==0.63.0 numpy==1.21.2 pipdeptree==2.2.1 pip==22.2.2 scikit-build==0.15.0 distro==1.7.0 packaging==21.3 pyparsing==3.0.9 setuptools==59.2.0 wheel==0.37.0 ``` I also removed all previous imports: ```auto pip show opencv-python WARNING: Package(s) not found: opencv-python pip show scikit-build -> Version: 0.15.0 pip show numpy -> Version: 1.21.2 pip show cmake -> Version: 3.24.0 pip show wheel -> Version: 0.37.0 pip show setuptools -> Version: 59.2.0 ``` I set python to 3.10.3 after running `pyevn global 3.10.3` Following that I did the following steps: ```auto git clone --recursive https://github.com/skvark/opencv-python.git cd opencv-python export CMAKE_ARGS="-DWITH_GSTREAMER=ON" pip install --upgrade pip wheel pip wheel . --verbose &> build.out ``` This failed with the following error: ```auto creating _skbuild/macosx-12.0-arm64-3.10/setuptools/bdist.macosx-12.0-arm64/wheel/opencv_python-4.6.0.60630d1.dist-info/WHEEL creating '/private/var/folders/9b/gpqz3hy13vg_s90qbfxtb8pc0000gn/T/pip-wheel-9eyrsscn/tmpnkbqsfp1/opencv_python-4.6.0.60630d1-cp310-cp310-macosx_12_0_arm64.whl' and adding '_skbuild/macosx-12.0-arm64-3.10/setuptools/bdist.macosx-12.0-arm64/wheel' to it adding 'cv2/LICENSE-3RD-PARTY.txt' adding 'cv2/LICENSE.txt' adding 'cv2/ __init__.py' adding 'cv2/config-3.py' adding 'cv2/config.py' adding 'cv2/cv2.abi3.so' adding 'cv2/load_config_py2.py' adding 'cv2/load_config_py3.py' adding 'cv2/version.py' adding 'cv2/data/ __init__.py' adding 'cv2/data/haarcascade_eye.xml' adding 'cv2/data/haarcascade_eye_tree_eyeglasses.xml' adding 'cv2/data/haarcascade_frontalcatface.xml' adding 'cv2/data/haarcascade_frontalcatface_extended.xml' adding 'cv2/data/haarcascade_frontalface_alt.xml' adding 'cv2/data/haarcascade_frontalface_alt2.xml' adding 'cv2/data/haarcascade_frontalface_alt_tree.xml' adding 'cv2/data/haarcascade_frontalface_default.xml' adding 'cv2/data/haarcascade_fullbody.xml' adding 'cv2/data/haarcascade_lefteye_2splits.xml' adding 'cv2/data/haarcascade_licence_plate_rus_16stages.xml' adding 'cv2/data/haarcascade_lowerbody.xml' adding 'cv2/data/haarcascade_profileface.xml' adding 'cv2/data/haarcascade_righteye_2splits.xml' adding 'cv2/data/haarcascade_russian_plate_number.xml' adding 'cv2/data/haarcascade_smile.xml' adding 'cv2/data/haarcascade_upperbody.xml' adding 'cv2/gapi/ __init__.py' adding 'cv2/mat_wrapper/ __init__.py' adding 'cv2/misc/ __init__.py' adding 'cv2/misc/version.py' adding 'cv2/utils/ __init__.py' adding 'opencv_python-4.6.0.60630d1.dist-info/LICENSE-3RD-PARTY.txt' adding 'opencv_python-4.6.0.60630d1.dist-info/LICENSE.txt' adding 'opencv_python-4.6.0.60630d1.dist-info/METADATA' adding 'opencv_python-4.6.0.60630d1.dist-info/WHEEL' adding 'opencv_python-4.6.0.60630d1.dist-info/top_level.txt' adding 'opencv_python-4.6.0.60630d1.dist-info/RECORD' removing _skbuild/macosx-12.0-arm64-3.10/setuptools/bdist.macosx-12.0-arm64/wheel Building wheel for opencv-python (pyproject.toml): finished with status 'done' Created wheel for opencv-python: filename=opencv_python-4.6.0.60630d1-cp310-cp310-macosx_12_0_arm64.whl size=11504833 sha256=e18841f81ce452659982d1e171a799c9145a815c8de8b0b7a9809b80ac2d8167 Stored in directory: .../Library/Caches/pip/wheels/24/50/27/aed596df8de2a2cbab5140a7a5774936bc1eee156ce1120fd4 WARNING: Built wheel for opencv-python is invalid: Metadata 1.2 mandates PEP 440 version, but '4.6.0.60630d1' is not Failed to build opencv-python ERROR: Failed to build one or more wheels ``` After checking out branch 5.x the build produces the following error: ```auto creating _skbuild/macosx-12.0-arm64-3.10/setuptools/bdist.macosx-12.0-arm64/wheel/opencv_python-5.0.0.27cca18.dist-info/WHEEL creating '/private/var/folders/9b/gpqz3hy13vg_s90qbfxtb8pc0000gn/T/pip-wheel-fm0tq_ze/tmpi5qsqgb_/opencv_python-5.0.0.27cca18-cp310-cp310-macosx_12_0_arm64.whl' and adding '_skbuild/macosx-12.0-arm64-3.10/setuptools/bdist.macosx-12.0-arm64/wheel' to it adding 'cv2/LICENSE-3RD-PARTY.txt' adding 'cv2/LICENSE.txt' adding 'cv2/ __init__.py' adding 'cv2/config-3.py' adding 'cv2/config.py' adding 'cv2/cv2.abi3.so' adding 'cv2/load_config_py2.py' adding 'cv2/load_config_py3.py' adding 'cv2/version.py' adding 'cv2/data/ __init__.py' adding 'cv2/data/haarcascade_eye.xml' adding 'cv2/data/haarcascade_eye_tree_eyeglasses.xml' adding 'cv2/data/haarcascade_frontalcatface.xml' adding 'cv2/data/haarcascade_frontalcatface_extended.xml' adding 'cv2/data/haarcascade_frontalface_alt.xml' adding 'cv2/data/haarcascade_frontalface_alt2.xml' adding 'cv2/data/haarcascade_frontalface_alt_tree.xml' adding 'cv2/data/haarcascade_frontalface_default.xml' adding 'cv2/data/haarcascade_fullbody.xml' adding 'cv2/data/haarcascade_lefteye_2splits.xml' adding 'cv2/data/haarcascade_licence_plate_rus_16stages.xml' adding 'cv2/data/haarcascade_lowerbody.xml' adding 'cv2/data/haarcascade_profileface.xml' adding 'cv2/data/haarcascade_righteye_2splits.xml' adding 'cv2/data/haarcascade_russian_plate_number.xml' adding 'cv2/data/haarcascade_smile.xml' adding 'cv2/data/haarcascade_upperbody.xml' adding 'cv2/gapi/ __init__.py' adding 'cv2/mat_wrapper/ __init__.py' adding 'cv2/misc/ __init__.py' adding 'cv2/misc/version.py' adding 'cv2/utils/ __init__.py' adding 'opencv_python-5.0.0.27cca18.dist-info/LICENSE-3RD-PARTY.txt' adding 'opencv_python-5.0.0.27cca18.dist-info/LICENSE.txt' adding 'opencv_python-5.0.0.27cca18.dist-info/METADATA' adding 'opencv_python-5.0.0.27cca18.dist-info/WHEEL' adding 'opencv_python-5.0.0.27cca18.dist-info/top_level.txt' adding 'opencv_python-5.0.0.27cca18.dist-info/RECORD' removing _skbuild/macosx-12.0-arm64-3.10/setuptools/bdist.macosx-12.0-arm64/wheel Building wheel for opencv-python (pyproject.toml): finished with status 'done' Created wheel for opencv-python: filename=opencv_python-5.0.0.27cca18-cp310-cp310-macosx_12_0_arm64.whl size=13781263 sha256=ad073c827fd1919f8b2d9d30c1076af7937975ada5e548917448ea99417b75a0 Stored in directory: .../Library/Caches/pip/wheels/24/50/27/aed596df8de2a2cbab5140a7a5774936bc1eee156ce1120fd4 WARNING: Built wheel for opencv-python is invalid: Metadata 1.2 mandates PEP 440 version, but '5.0.0.27cca18' is not Failed to build opencv-python ERROR: Failed to build one or more wheels ``` I can build on branch 3.4 without a issue, but any subsequent tagged versions seem to fail without an explicit error in the output. What is causing the build error or how can I fix it? Thanks! ---
**Author:** ![arm2000](https://avatars.discourse-cdn.com/v4/letter/a/51bf81/32.png) [@arm2000](https://forum.opencv.org/u/arm2000)\ **Post date:** [August 15, 2022, 7:01am UTC](https://forum.opencv.org/t/error-building-wheel-for-opencv-python-from-source/9850/2 "2022-08-15T07:01:59Z")
Was able to look through `find_version.py` and found out that if I checked out a specific tag then then wheel build would actually comply with PEP 440. So I fixed this with: ```auto git checkout tags/66 -b 4.6.0.66 rm -rf _skbuild pip wheel . --verbose &> build.out ``` After which I was able to install with ` pip install opencv_python*.whl`. A follow up question, should this be using PEP 440, instead of a later version? Or is this something wrong with my setup? Thanks! ---
**Author:** ![berak](https://avatars.discourse-cdn.com/v4/letter/b/85f322/32.png) [@berak](https://forum.opencv.org/u/berak)\ **Post date:** [August 15, 2022, 3:52pm UTC](https://forum.opencv.org/t/error-building-wheel-for-opencv-python-from-source/9850/3 "2022-08-15T15:52:18Z")
just out of curiosity – why do you try to build a wheel ? what’s the use-case here ? (lots of overhead, compared to just building the cv2 module locally) ---
**Author:** ![arm2000](https://avatars.discourse-cdn.com/v4/letter/a/51bf81/32.png) [@arm2000](https://forum.opencv.org/u/arm2000)\ **Post date:** [August 16, 2022, 2:50am UTC](https://forum.opencv.org/t/error-building-wheel-for-opencv-python-from-source/9850/4 "2022-08-16T02:50:46Z")
According to the readme opencv-python does not come bundled with GStreamer, and it is recommended that we have to build with `WITH_GSTREAMER=ON` option. In my case I am testing capturing frames with gstreamer instead of ffmpeg. By building the wheel locally and installing it via pip I can then import the package in my `requirements.txt` file. Is there a better way here? Additionally I notice that even `with_gstreamer=on` it does not install plugins\_good/bad/ugly. This causes errors for rtsp streams: `opencv-python/opencv/modules/videoio/src/cap_gstreamer.cpp (1127) open OpenCV | GStreamer warning: Error opening bin: no element "rtspsrc"`. Is there a way to include these plugins in macos? Or circling back, is there a better way to import in opencv-python with gstreamer?