参考：
https://stackoverflow.com/questions/77410272/problems-installing-python-av-in-windows-11
https://github.com/PyAV-Org/PyAV/issues/1177
================================
报错信息：
C:\Windows.old\Users\chris>pip install av
Defaulting to user installation because normal site-packages is not writeable
Collecting av
Using cached av-10.0.0.tar.gz (2.4 MB)
Installing build dependencies ... done
Getting requirements to build wheel ... error
error: subprocess-exited-with-error
× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> [74 lines of output]
Compiling av\buffer.pyx because it changed.
[1/1] Cythonizing av\buffer.pyx
Compiling av\bytesource.pyx because it changed.
[1/1] Cythonizing av\bytesource.pyx
Compiling av\descriptor.pyx because it changed.
[1/1] Cythonizing av\descriptor.pyx
Compiling av\dictionary.pyx because it changed.
[1/1] Cythonizing av\dictionary.pyx
Compiling av\enum.pyx because it changed.
[1/1] Cythonizing av\enum.pyx
Compiling av\error.pyx because it changed.
[1/1] Cythonizing av\error.pyx
Compiling av\format.pyx because it changed.
[1/1] Cythonizing av\format.pyx
Compiling av\frame.pyx because it changed.
[1/1] Cythonizing av\frame.pyx
performance hint: av\logging.pyx:232:5: Exception check on 'log_callback' will always require the GIL to be acquired.
Possible solutions:
1. Declare the function as 'noexcept' if you control the definition and you're sure you don't want the function to raise exceptions.
2. Use an 'int' return type on the function to allow an error code to be returned.
Error compiling Cython file:
------------------------------------------------------------
...
cdef const char *log_context_name(void *ptr) nogil:
cdef log_context *obj = <log_context*>ptr
return obj.name
cdef lib.AVClass log_class
log_class.item_name = log_context_name
^
------------------------------------------------------------
av\logging.pyx:216:22: Cannot assign type 'const char *(void *) except? NULL nogil' to 'const char *(*)(void *) noexcept nogil'. Exception values are incompatible. Suggest adding 'noexcept' to type 'const char *(void *) except? NULL nogil'.
Error compiling Cython file:
------------------------------------------------------------
...
# Start the magic!
# We allow the user to fully disable the logging system as it will not play
# nicely with subinterpreters due to FFmpeg-created threads.
if os.environ.get('PYAV_LOGGING') != 'off':
lib.av_log_set_callback(log_callback)
^
------------------------------------------------------------
av\logging.pyx:351:28: Cannot assign type 'void (void *, int, const char *, va_list) except * nogil' to 'av_log_callback'. Exception values are incompatible. Suggest adding 'noexcept' to type 'void (void *, int, const char *, va_list) except * nogil'.
Compiling av\logging.pyx because it changed.
[1/1] Cythonizing av\logging.pyx
Traceback (most recent call last):
File "C:\Program Files\Python312\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 353, in <module>
main()
File "C:\Program Files\Python312\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 335, in main
json_out['return_val'] = hook(**hook_input['kwargs'])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python312\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 118, in get_requires_for_build_wheel
return hook(config_settings)
^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\chris\AppData\Local\Temp\pip-build-env-4nz2e7u1\overlay\Lib\site-packages\setuptools\build_meta.py", line 355, in get_requires_for_build_wheel
return self._get_build_requires(config_settings, requirements=['wheel'])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\chris\AppData\Local\Temp\pip-build-env-4nz2e7u1\overlay\Lib\site-packages\setuptools\build_meta.py", line 325, in _get_build_requires
self.run_setup()
File "C:\Users\chris\AppData\Local\Temp\pip-build-env-4nz2e7u1\overlay\Lib\site-packages\setuptools\build_meta.py", line 507, in run_setup
super(_BuildMetaLegacyBackend, self).run_setup(setup_script=setup_script)
File "C:\Users\chris\AppData\Local\Temp\pip-build-env-4nz2e7u1\overlay\Lib\site-packages\setuptools\build_meta.py", line 341, in run_setup
exec(code, locals())
File "<string>", line 157, in <module>
File "C:\Users\chris\AppData\Local\Temp\pip-build-env-4nz2e7u1\overlay\Lib\site-packages\Cython\Build\Dependencies.py", line 1154, in cythonize
cythonize_one(*args)
File "C:\Users\chris\AppData\Local\Temp\pip-build-env-4nz2e7u1\overlay\Lib\site-packages\Cython\Build\Dependencies.py", line 1321, in cythonize_one
raise CompileError(None, pyx_file)
Cython.Compiler.Errors.CompileError: av\logging.pyx
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error
× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.
note: This error originates from a subprocess, and is likely not a problem with pip.
[notice] A new release of pip is available: 23.2.1 -> 23.3.1
[notice] To update, run: python.exe -m pip install --upgrade pip
解决方法：
网上给出的解决方法：
1.
The problem is not Windows 11. The problem lies within python 3.12 . The package av is not yet released for python 3.12.
Please try to install av under python 3.11.
2.
I had the same issue and switching from Python 3.12.0 to 3.11.6 solved it for me
------------------------------
个人实测的成功解决方法：
把Python的版本从Python 3.11降到Python 3.10，不再报错，成功解决。
============================
查询Google：
标签：pyx,because,logging,报错,build,File,av,pip From： https://www.cnblogs.com/devilmaycry812839668/p/17871319.html