added screen recorder tutorial

Author: x4nth055

general/screen-recorder/README.md

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+# [How to Make a Screen Recorder in Python](https://www.thepythoncode.com/article/make-screen-recorder-python)
+To run this:
+-`pip3 install -r requirements.txt`
+-`python3 screen_recorder.py`

general/screen-recorder/requirements.txt

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+numpy
+opencv-python
+pyautogui

general/screen-recorder/screen_recorder.py

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+importcv2
+importnumpyasnp
+importpyautogui
+
+# display screen resolution, get it from your OS settings
+SCREEN_SIZE= (1920, 1080)
+# define the codec
+fourcc=cv2.VideoWriter_fourcc(*"XVID")
+# create the video write object
+out=cv2.VideoWriter("output.avi", fourcc, 20.0, (SCREEN_SIZE))
+
+whileTrue:
+# make a screenshot
+img=pyautogui.screenshot()
+# 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
+ifcv2.waitKey(1) ==ord("q"):
+break
+
+# make sure everything is closed when exited
+cv2.destroyAllWindows()
+out.release()
+