environment
windows 10 64bit
python 3.8
mss 6.1.0
foreword
python-mssIt is a very fast screenshot tool that supports cross-platform and is developed in pure pythonlanguage .
Install
pipInstall using the command
pip install msspython-mssA command line tool is also provided, you can directly capture the screen mssby , the default is full screen
Other available parameters can be viewed mss -hthrough
$ mss -h
usage: mss [-h] [-c COORDINATES] [-l {0,1,2,3,4,5,6,7,8,9}] [-m MONITOR]
[-o OUTPUT] [-q] [-v]
optional arguments:
-h, --help show this help message and exit
-c COORDINATES, --coordinates COORDINATES
the part of the screen to capture: top, left, width,
height
-l {0,1,2,3,4,5,6,7,8,9}, --level {0,1,2,3,4,5,6,7,8,9}
the PNG compression level
-m MONITOR, --monitor MONITOR
the monitor to screen shot
-o OUTPUT, --output OUTPUT
the output file name
-q, --quiet do not print created files
-v, --version show program's version number and exitPractical
Let's look at the content of two parts, the first one is the screenshot, which is also its basic function
# 导入模块
import mss
# 实例化对象
with mss.mss() as sct:
# 通过参数output指定保存的文件名
sct.shot(output='output.png')shotThere is also a parameter in the method callback, which is convenient for us to use the callback
import mss
def fun_callback(filename):
# 作为示例，打印下截取的文件名
print(filename)
with mss.mss() as sct:
# 通过参数output指定保存的文件名
filename = sct.shot(output='output.png', callback=fun_callback)If it is to intercept part of the window
import mss
with mss.mss() as sct:
# 设置一个区域，top为距离屏幕左上角的垂直方向上的距离，left是水平方向的距离，后面2个分别是宽和高
monitor = {"top":50, "left":50, "width": 600, "height": 400}
image_sct = sct.grab(monitor)
# 转换成png保存起来
mss.tools.to_png(image_sct.rgb, image_sct.size, output="output.png")If you need mssto convert the image format to PIL, you can do this
import mss
from PIL import Image
with mss.mss() as sct:
# 设置一个区域，top为距离屏幕左上角的垂直方向上的距离，left是水平方向的距离，后面2个分别是宽和高
monitor = {"top":50, "left":50, "width": 600, "height": 400}
image_sct = sct.grab(monitor)
image_pil = Image.frombytes('RGB', image_sct.size, image_sct.bgra, 'raw', 'BGRX')
image_pil.save('output_pil.png')In the second example, let's see how to record the screen? Here, you need to use it opencv, just look at the code
import mss
import cv2
import numpy as np
from PIL import Image
monitor = {"top":50, "left":50, "width": 600, "height": 400}
fourcc = cv2.VideoWriter_fourcc(*'MJPG')
fps = 20
video = cv2.VideoWriter('output.avi', fourcc, fps, (600, 400))
with mss.mss() as sct:
# 设置一个区域，top为距离屏幕左上角的垂直方向上的距离，left是水平方向的距离，后面2个分别是宽和高
while True:
image_sct = sct.grab(monitor)
image_pil = Image.frombytes('RGB', image_sct.size, image_sct.bgra, 'raw', 'BGRX')
image_cv = np.array(image_pil)
video.write(image_cv)
if cv2.waitKey(25) & 0xFF == ord('q'):
break
video.release()For more details, please refer to the official link https://github.com/BoboTiG/python-mss
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