python - 苹果操作系统 : Using python to capture screenshots of a specific window

Question

我正在使用 MSS 捕获我的屏幕截图。 (因为它捕获更快的屏幕截图)

但我不确定如何在 Mac 中捕获特定窗口，我知道他们为 Windows 用户提供了 win32... 我现在拥有的代码只是一个不断循环捕获我的主监视器。

主要文件:

import cv2 as cv
import numpy as np
from time import time
from mss import mss


def window_capture():
    loop_time = time()

    with mss() as sct:
        monitor = {"top": 40, "left": 0, "width": 800, "height": 600}

        while(True):

            screenshot = np.array(sct.grab(monitor))
            screenshot = cv.cvtColor(screenshot, cv.COLOR_RGB2BGR)

            cv.imshow('Computer Vision', screenshot)

            print('FPS {}'.format(1 / (time() - loop_time)))
            loop_time = time()

            if cv.waitKey(1) == ord('q'):
                cv.destroyAllWindows()
                break


window_capture()

print('Done.')

Answer 1

我编写了以下 ObjectiveC 片段，它获取 macOS 中所有窗口的名称、所有者、窗口 ID 和在屏幕上的位置。我将其保存为 windowlist.m 并使用文件顶部注释中的命令对其进行了编译:

////////////////////////////////////////////////////////////////////////////////
// windowlist.m
// Mark Setchell
//
// Get list of windows with their characteristics
//
// Compile with:
// clang windowlist.m -o windowlist -framework coregraphics -framework cocoa
//
// Run with:
// ./windowlist
//
////////////////////////////////////////////////////////////////////////////////
#include <Cocoa/Cocoa.h>
#include <CoreGraphics/CGWindow.h>

int main(int argc, char **argv)
{
   NSArray *windows = (NSArray *)CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly,kCGNullWindowID);
   for(NSDictionary *window in windows){
      int WindowNum = [[window objectForKey:(NSString *)kCGWindowNumber] intValue];
      NSString* OwnerName = [window objectForKey:(NSString *)kCGWindowOwnerName];
      int OwnerPID = [[window objectForKey:(NSString *) kCGWindowOwnerPID] intValue];
      NSString* WindowName= [window objectForKey:(NSString *)kCGWindowName];
      CFDictionaryRef bounds = (CFDictionaryRef)[window objectForKey:(NSString *)kCGWindowBounds];
      CGRect rect;
      CGRectMakeWithDictionaryRepresentation(bounds,&rect);
      printf("%s:%s:%d:%d:%f,%f,%f,%f\n",[OwnerName UTF8String],[WindowName UTF8String],WindowNum,OwnerPID,rect.origin.x,rect.origin.y,rect.size.height,rect.size.width);
   }
}

它给出这样的输出，其中每行的最后 4 项是窗口左上角、高度和宽度。您可以使用 Python 的 subprocess.Popen() “按原样” 运行此程序并获取窗口列表，或者您可以使用 PyObjc 将其转换为 Python Python 模块:

Location Menu:Item-0:4881:1886:1043.000000,0.000000,22.000000,28.000000
Backup and sync from Google:Item-0:1214:8771:1071.000000,0.000000,22.000000,30.000000
Dropbox:Item-0:451:1924:1101.000000,0.000000,22.000000,28.000000
NordVPN IKE:Item-0:447:1966:1129.000000,0.000000,22.000000,26.000000
PromiseUtilityDaemon:Item-0:395:1918:1155.000000,0.000000,22.000000,24.000000
SystemUIServer:AppleTimeMachineExtra:415:1836:1179.000000,0.000000,22.000000,40.000000
SystemUIServer:AppleBluetoothExtra:423:1836:1219.000000,0.000000,22.000000,30.000000
SystemUIServer:AirPortExtra:409:1836:1249.000000,0.000000,22.000000,30.000000
SystemUIServer:AppleVolumeExtra:427:1836:1279.000000,0.000000,22.000000,30.000000
SystemUIServer:BatteryExtra:405:1836:1309.000000,0.000000,22.000000,67.000000
SystemUIServer:AppleClockExtra:401:1836:1376.000000,0.000000,22.000000,123.000000
SystemUIServer:AppleUser:419:1836:1499.000000,0.000000,22.000000,99.000000
Spotlight:Item-0:432:1922:1598.000000,0.000000,22.000000,36.000000
SystemUIServer:NotificationCenter:391:1836:1634.000000,0.000000,22.000000,46.000000
Window Server:Menubar:353:253:0.000000,0.000000,22.000000,1680.000000
Dock:Dock:387:1835:0.000000,0.000000,1050.000000,1680.000000
Terminal:windowlist — -bash — 140×30:4105:6214:70.000000,285.000000,658.000000,1565.000000