OSError: [WinError 193] %1 is not a valid Win32 application opencv.js

问题

I have tried to build opencv.js from the tutorial on their page.

I have done all the steps except the last one to build it:

C:\Users\student>python C:\Users\student\opencv\platforms\js\build_js.py documents

which gives me this error:

Args: Namespace(build_dir='documents', build_doc=False, build_test=False, build_wasm=False, clean_build_dir=False, config_only=False, emscripten_dir=None, enable_exception=False, opencv_dir='C:\\Users\\student\\opencv', skip_config=False)
Cannot get Emscripten path, please specify it either by EMSCRIPTEN environment variable or --emscripten_dir option.

I try using this then

C:\Users\student>python C:\Users\student\opencv\platforms\js\build_js.py --emscripten=C:\Users\student\emsdk\emscripten\1.37.36 documents

with the --emscripten option but I got this instead:

Args: Namespace(build_dir='documents', build_doc=False, build_test=False, build_wasm=False, clean_build_dir=False, config_only=False, emscripten_dir='C:\\Users\\student\\emsdk\\emscripten\\1.37.36', enable_exception=False, opencv_dir='C:\\Users\\student\\opencv', skip_config=False)
Check dir C:\Users\student\documents (create: True, clean: False)
Check dir C:\Users\student\opencv (create: False, clean: False)
Check dir C:\Users\student\emsdk\emscripten\1.37.36 (create: False, clean: False)
Traceback (most recent call last):
  File "C:\Users\student\opencv\platforms\js\build_js.py", line 215, in <module>
    builder = Builder(args)
  File "C:\Users\student\opencv\platforms\js\build_js.py", line 84, in __init__
    self.emcc_version = determine_emcc_version(self.emscripten_dir)
  File "C:\Users\student\opencv\platforms\js\build_js.py", line 62, in determine_emcc_version
    ret = subprocess.check_output([os.path.join(emscripten_dir, "emcc"), "--version"])
  File "C:\Users\student\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 336, in check_output
    **kwargs).stdout
  File "C:\Users\student\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 403, in run
    with Popen(*popenargs, **kwargs) as process:
  File "C:\Users\student\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 709, in __init__
    restore_signals, start_new_session)
  File "C:\Users\student\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 997, in _execute_child
    startupinfo)
OSError: [WinError 193] %1 is not a valid Win32 application

I have searched for this problem for almost 2 days but nothing solve it.

I'm using Windows 10 64bit.

回答1:

Open opencv\platforms\js\build_js.py file, and replace this line:

ret = subprocess.check_output([os.path.join(emscripten_dir, "emcc"), "--version"])

with this:

ret = subprocess.check_output([os.path.join(emscripten_dir, "emcc.bat"), "--version"])

Hope this will be fixed in next opencv version.

来源：https://stackoverflow.com/questions/49748702/oserror-winerror-193-1-is-not-a-valid-win32-application-opencv-js

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