Implemented a cross-platform solution for sounding alarms.

README.md

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+# A small OpenCV-based face recognition script. 
+### 🚨 Alarm sounds when a face is detected.

main.py

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 import cv2
-import winsound
-cam = cv2.VideoCapture(1)
-while cam.isOpened():
-    ret, frame1 = cam.read()
-    ret, frame2 = cam.read()
-    diff = cv2.absdiff(frame1, frame2)
-    gray = cv2.cvtColor(diff, cv2.COLOR_RGB2GRAY)
-    blur = cv2.GaussianBlur(gray, (5, 5), 0)
-    _, thresh = cv2.threshold(blur, 20, 255, cv2.THRESH_BINARY)
-    dilated = cv2.dilate(thresh, None, iterations=3)
-    contours, _ = cv2.findContours(dilated, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
-    # cv2.drawContours(frame1, contours, -1, (0, 255, 0), 2)
-    for c in contours:
-        if cv2.contourArea(c) < 5000:
-            continue
-        x, y, w, h = cv2.boundingRect(c)
-        cv2.rectangle(frame1, (x, y), (x+w, y+h), (0, 255, 0), 2)
-        winsound.PlaySound('alert.wav', winsound.SND_ASYNC)
-    if cv2.waitKey(10) == ord('q'):
-        break
-    cv2.imshow('Granny Cam', frame1)
+import sounddevice as sd
+from scipy.io import wavfile
+
+if __name__ == '__main__':
+    cam = cv2.VideoCapture(1)
+    while cam.isOpened():
+        ret, frame1 = cam.read()
+        ret, frame2 = cam.read()
+        diff = cv2.absdiff(frame1, frame2)
+        gray = cv2.cvtColor(diff, cv2.COLOR_RGB2GRAY)
+        blur = cv2.GaussianBlur(gray, (5, 5), 0)
+        _, thresh = cv2.threshold(blur, 20, 255, cv2.THRESH_BINARY)
+        dilated = cv2.dilate(thresh, None, iterations=3)
+        contours, _ = cv2.findContours(dilated, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
+        # cv2.drawContours(frame1, contours, -1, (0, 255, 0), 2)
+        for c in contours:
+            if cv2.contourArea(c) < 5000:
+                continue
+            x, y, w, h = cv2.boundingRect(c)
+            cv2.rectangle(frame1, (x, y), (x + w, y + h), (0, 255, 0), 2)
+            fs, data = wavfile.read('alert.wav')
+            sd.play(data, fs)
+        if cv2.waitKey(10) == ord('q'):
+            break
+        cv2.imshow('Granny Cam', frame1)

requirements.txt

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+opencv-python
+sounddevice
+scipy