+- Python Forum (https://python-forum.io)
+-- Forum: Python Coding (https://python-forum.io/forum-7.html)
+--- Forum: General Coding Help (https://python-forum.io/forum-8.html)
+--- Thread: pyautogui.screenshot region is not working (/thread-27357.html)
pyautogui.screenshot region is not working - alexlu - Jun-04-2020
When I try to capture a video screenshot of my screen in a region suddenly the .avi output file becomes a 7kb. The is no error, so I do not know how to fix this The output video is fine before selecting the region. how can i fix this problem?
# create the video write object img = pyautogui.screenshot(region=(350, 800, 500, 150)) # --->saves 7kb .avi file img = pyautogui.screenshot() # --->works fine
RE: pyautogui.screenshot region is not working - buran - Jun-04-2020
this code just returns the screenshot, it does not save anything. show your full code (minimal reproducible example)
RE: pyautogui.screenshot region is not working - alexlu - Jun-04-2020
Here is the full code
import cv2
import numpy as np
import pyautogui
# display screen resolution, get it from your OS settings
import tkinter as tk
root = tk.Tk()
screen_width = root.winfo_screenwidth()
screen_height = root.winfo_screenheight()
SCREEN_SIZE = (screen_width, screen_height)
fourcc = cv2.VideoWriter_fourcc(*"XVID")
# create the video write object
out = cv2.VideoWriter("output.avi", fourcc, 20.0, (SCREEN_SIZE))
while True:
# make a screenshot
img = pyautogui.screenshot(region=(350, 800, 500, 150))
# convert these pixels to a proper numpy array to work with OpenCV
frame = np.array(img)
# convert colors from BGR to RGB
frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
# write the frame
out.write(frame)
# show the frame
cv2.imshow("screenshot", frame)
# if the user clicks q, it exits
if cv2.waitKey(1) == ord("q"):
break
# make sure everything is closed when exited
cv2.destroyAllWindows()
out.release()
RE: pyautogui.screenshot region is not working - buran - Jun-04-2020
To start debug I would try and save
img separately, so that you know what you actually get on line 17.Also note that
pyautogui just uses pyscreeze for screenshot functions, which in turn uses Pillow.ImageGrab on Windows. By the way Pillow.ImageGrab now works also on Mac, but pyscreeze still uses subrpocess call to screencapture
RE: pyautogui.screenshot region is not working - alexlu - Jun-04-2020
The problem was this part and changing the last two parameters solved the problem.
out = cv2.VideoWriter("output.avi", fourcc, 20.0, (SCREEN_SIZE))
RE: pyautogui.screenshot region is not working - buran - Jun-04-2020
thanks for posting back. how did you change them in order to work?
RE: pyautogui.screenshot region is not working - alexlu - Jun-04-2020
I just changed this part :
out = cv2.VideoWriter("output.avi", fourcc, 8.0, (500, 150))
but the problem is somehow remained. Still it is inconsistent. Like three times out of five times it saves the .avi file as 6kb again, specially if I change the saving path it is going to record as 6kb constantly. It is really strange.
changing
fourcc = cv2.VideoWriter_fourcc(*"XVID") to :
fourcc = cv2.VideoWriter_fourcc('M','J','P','G')
also solved the problem with inconsistency.