PyWin32 ne peut pas capturer certaines fenêtres, ce qui entraîne un écran noir (Python, Windows)

Merci à @wchill sur Github d'avoir trouvé cette solution (lien) ! Disponible sous Windows, fonctionne avec l'accélération matérielle et les fenêtres masquées par d'autres fenêtres.

import cv2
import numpy as np
from ctypes import windll
import win32gui
import win32ui


def capture_win_alt(hwnd=None, bmpFileName='hwnd.bmp', jpgFileName='hwnd.png', delete=False,
                    program_windowTitle='Swapface', program_className='Chrome_WidgetWin_1'):
    # Adapted from https://stackoverflow.com/questions/19695214/screenshot-of-inactive-window-printwindow-win32gui
    windll.user32.SetProcessDPIAware()
    if not hwnd:
        hwnd = win32gui.FindWindow(None, program_windowTitle)
        # hwnd = win32gui.FindWindowEx(0, 0, program_className, program_windowTitle)
    logger.info(f'hwnd: {hwnd}')
    if not hwnd:
        return None
    left, top, right, bottom = win32gui.GetClientRect(hwnd)
    w = right - left
    h = bottom - top
    hwnd_dc = win32gui.GetWindowDC(hwnd)
    mfc_dc = win32ui.CreateDCFromHandle(hwnd_dc)
    save_dc = mfc_dc.CreateCompatibleDC()
    bitmap = win32ui.CreateBitmap()
    bitmap.CreateCompatibleBitmap(mfc_dc, w, h)
    save_dc.SelectObject(bitmap)
    # If Special K is running, this number is 3. If not, 1
    result = windll.user32.PrintWindow(hwnd, save_dc.GetSafeHdc(), 3)
    bmpinfo = bitmap.GetInfo()
    bmpstr = bitmap.GetBitmapBits(True)
    img = np.frombuffer(bmpstr, dtype=np.uint8).reshape((bmpinfo["bmHeight"], bmpinfo["bmWidth"], 4))
    img = np.ascontiguousarray(img)[..., :-1]  # make image C_CONTIGUOUS and drop alpha channel
    if not result:  # result should be 1
        win32gui.DeleteObject(bitmap.GetHandle())
        save_dc.DeleteDC()
        mfc_dc.DeleteDC()
        win32gui.ReleaseDC(hwnd, hwnd_dc)
        raise RuntimeError(f"Unable to acquire screenshot! Result: {result}")
    cv2.imwrite(jpgFileName, img)
    return img


def main():
    WINDOW_NAME = "Swapface"
    while cv2.waitKey(1) != ord('q'):
        screenshot = capture_win_alt(program_windowTitle=WINDOW_NAME)
        if screenshot is not None:
            print(screenshot.shape)


if __name__ == '__main__':
    main()