Use different video stream

Now using the cv2 video stream instead of the imUtils one, since it seems to be a little less latent.

authenticate_user.py

@@ -82,7 +82,7 @@ def recognize_user(known_faces: dict, encoding_model: str = "hog", image_flip: i
     timeout_time: float = time.time() + TIMEOUT
     while time.time() < timeout_time:
         # Read a image_frame from the video stream.
-        image_frame = video_stream.read()
+        ret, image_frame = video_stream.read()
         if image_flip is not None:
             image_frame = cv2.flip(image_frame, image_flip)
 

common.py

-import time
-
 import cv2
-from imutils.video import VideoStream
 
 DATABASE_LOC = "./dataset/faces.pickle"
 
@@ -14,6 +11,5 @@ def display_frame(frame):
 def start_video_stream(camera: int):
     """Starts the video stream and returns the created stream.
     Also waits for the video stream to open before returning it."""
-    video_stream = VideoStream(src=camera).start()
-    time.sleep(2.0)
+    video_stream = cv2.VideoCapture(0)
     return video_stream