opencv报错及解决：AttributeError: module ‘cv2‘ has no attribute ‘gapi_wip_gst

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更新opencv版本后运行代码报错，报错内容如下

File "E:/code/***.py", line 9, in <module>
    import cv2
  File "D:\Program Files (x86)\Anaconda3\envs\y\lib\site-packages\cv2\__init__.py", line 181, in <module>
    bootstrap()
  File "D:\Program Files (x86)\Anaconda3\envs\y\lib\site-packages\cv2\__init__.py", line 175, in bootstrap
    if __load_extra_py_code_for_module("cv2", submodule, DEBUG):
  File "D:\Program Files (x86)\Anaconda3\envs\y\lib\site-packages\cv2\__init__.py", line 28, in __load_extra_py_code_for_module
    py_module = importlib.import_module(module_name)
  File "D:\Program Files (x86)\Anaconda3\envs\y\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "D:\Program Files (x86)\Anaconda3\envs\y\lib\site-packages\cv2\gapi\__init__.py", line 301, in <module>
    cv.gapi.wip.GStreamerPipeline = cv.gapi_wip_gst_GStreamerPipeline
AttributeError: module 'cv2' has no attribute 'gapi_wip_gst_GStreamerPipeline'

解决方案

第一步：查看所有安装的opencv

conda list | findstr opencv

查看显示结果

opencv-python             4.8.1.78                 pypi_0    pypi
opencv-python-headless    4.5.2.52                 pypi_0    pypi

可以看到有两个版本的opencv-python，一个opencv-python和一个无头的opencv-python（opencv-python-headless）这两个opencv之间会有冲突，可能会造成上述报错。

第二步：先卸载opencv-python

pip uninstall opencv-python

第三步：查看环境中是否可以调用cv2

python
import cv2

若无报错，则可以间接表明opencv-python和opencv-python-headless之间存在冲突。

第四步：卸载opencv-python-headless

pip uninstall opencv-python-headless

卸载时显示的过程

Found existing installation: opencv-python-headless 4.5.2.52
Uninstalling opencv-python-headless-4.5.2.52:
  Would remove:
    d:\program files (x86)\anaconda3\envs\y\lib\site-packages\cv2\cv2.cp37-win_amd64.pyd
    d:\program files (x86)\anaconda3\envs\y\lib\site-packages\cv2\opencv_videoio_ffmpeg452_64.dll
    d:\program files (x86)\anaconda3\envs\y\lib\site-packages\opencv_python_headless-4.5.2.52.dist-info\*
Proceed (Y/n)? y
  Successfully uninstalled opencv-python-headless-4.5.2.52

第五步：安装opencv-python

pip install opencv-python -i  https://pypi.tuna.tsinghua.edu.cn/simple

Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Collecting opencv-python
  Using cached https://pypi.tuna.tsinghua.edu.cn/packages/38/d2/3e8c13ffc37ca5ebc6f382b242b44acb43eb489042e1728407ac3904e72f/opencv_python-4.8.1.78-cp37-abi3-win_amd64.whl (38.1 MB)
Requirement already satisfied: numpy>=1.17.0 in d:\program files (x86)\anaconda3\envs\y\lib\site-packages (from opencv-python) (1.21.6)
Installing collected packages: opencv-python
Successfully installed opencv-python-4.8.1.78

安装完成后重新运行代码，报错成功解决。
当然，也可以尝试直接逃过第二三步，直接卸载opencv-python-headless，由于本机的环境问题已经解决，并未进行上述尝试。所示不确定是否可以解决问题。

一点点意外经验：更新opencv版本后，代码的性能有所提升（运行处理时间减少）文章来源地址https://www.toymoban.com/news/detail-712987.html

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