Drop the frame if we could not get the data.

blinky_gui.py

@@ -98,7 +98,12 @@ def animate(i):
     t = float(i) / fps_
     ret, img = cap_.read()
     (x0, y0), (x1, y1) = box_
-    frame = img[y0:y1,x0:x1]
+    try:
+        frame = img[y0:y1,x0:x1]
+    except Exception as e:
+        print('[WARN] Frame %s dropped' % i)
+        return lines_.values(), time_text_
+
     gray = cv2.cvtColor(frame, cv2.COLOR_RGB2GRAY)
 
     if save_video_:

webcam.py

@@ -119,11 +119,12 @@ def onmouse(event, x, y, flags, params):
 def get_bounding_box(frame):
     global current_frame_, bbox_
     current_frame_ = frame.copy()
-    cv2.namedWindow('Bound_eye')
-    cv2.setMouseCallback('Bound_eye', onmouse)
+    title = "Bound eye and press 'q' to quit."
+    cv2.namedWindow(title)
+    cv2.setMouseCallback(title, onmouse)
     clone = frame.copy()
     while True:
-        cv2.imshow("Bound_eye", current_frame_)
+        cv2.imshow(title, current_frame_)
         key = cv2.waitKey(1) & 0xFF
         if key == ord("c"):
             current_frame_ = clone.copy()