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add recording specific window tutorial

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`@@ -181,6 +181,7 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy`
`181`	`181`	`-[How to Extract Frames from Video in Python](https://www.thepythoncode.com/article/extract-frames-from-videos-in-python). ([code](python-for-multimedia/extract-frames-from-video))`
`182`	`182`	`-[How to Reverse Videos in Python](https://www.thepythoncode.com/article/reverse-video-in-python). ([code](python-for-multimedia/reverse-video))`
`183`	`183`	`-[How to Extract Video Metadata in Python](https://www.thepythoncode.com/article/extract-media-metadata-in-python). ([code](python-for-multimedia/extract-video-metadata))`
	`184`	`+-[How to Record a Specific Window in Python](https://www.thepythoncode.com/article/record-a-specific-window-in-python). ([code](python-for-multimedia/record-specific-window))`
`184`	`185`
`185`	`186`
`186`	`187`	`For any feedback, please consider pulling requests.`

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	`1`	`+#[How to Record a Specific Window in Python](https://www.thepythoncode.com/article/record-a-specific-window-in-python)`
	`2`	`+To run this:`
	`3`	+-`pip3 install -r requirements.txt`
	`4`	+- Example: for recording Chrome:`python record_specific_window.py Chrome`

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	`1`	`+importcv2`
	`2`	`+importnumpyasnp`
	`3`	`+importpyautogui`
	`4`	`+importpygetwindowasgw`
	`5`	`+importsys`
	`6`	`+`
	`7`	`+# the window name, e.g "notepad", "Chrome", etc.`
	`8`	`+window_name=sys.argv[1]`
	`9`	`+`
	`10`	`+# define the codec`
	`11`	`+fourcc=cv2.VideoWriter_fourcc(*"XVID")`
	`12`	`+# frames per second`
	`13`	`+fps=12.0`
	`14`	`+# the time you want to record in seconds`
	`15`	`+record_seconds=10`
	`16`	`+# search for the window, getting the first matched window with the title`
	`17`	`+w=gw.getWindowsWithTitle(window_name)[0]`
	`18`	`+# activate the window`
	`19`	`+w.activate()`
	`20`	`+# create the video write object`
	`21`	`+out=cv2.VideoWriter("output.avi",fourcc,fps,tuple(w.size))`
	`22`	`+`
	`23`	`+foriinrange(int(record_seconds*fps)):`
	`24`	`+# make a screenshot`
	`25`	`+img=pyautogui.screenshot(region=(w.left,w.top,w.width,w.height))`
	`26`	`+# convert these pixels to a proper numpy array to work with OpenCV`
	`27`	`+frame=np.array(img)`
	`28`	`+# convert colors from BGR to RGB`
	`29`	`+frame=cv2.cvtColor(frame,cv2.COLOR_BGR2RGB)`
	`30`	`+# write the frame`
	`31`	`+out.write(frame)`
	`32`	`+# show the frame`
	`33`	`+cv2.imshow("screenshot",frame)`
	`34`	`+# if the user clicks q, it exits`
	`35`	`+ifcv2.waitKey(1)==ord("q"):`
	`36`	`+break`
	`37`	`+`
	`38`	`+# make sure everything is closed when exited`
	`39`	`+cv2.destroyAllWindows()`
	`40`	`+out.release()`
	`41`	`+`

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