Add traceback

extras/opencv_test.py

@@ -1,5 +1,6 @@
 import cv2
 import pathlib
+import traceback, sys
 
 image_name = "github.png"
 video_name = "test.mp4"
@@ -8,10 +9,16 @@
 
 current_dir = str(pathlib.Path(__file__).parent.absolute())
 
-img = cv2.imread(current_dir + "/" + image_name)
-if img is not None:
-    print("Imread successful!")
+try:
+    img = cv2.imread(current_dir + "/" + image_name)
+    if img is not None:
+        print("Imread successful!")
+except Exception:
+    traceback.print_exc(file=sys.stdout)
 
-cap = cv2.VideoCapture(current_dir + "/" + video_name)
-if cap is not None and cap.isOpened():
-    print("VideoCapture successful!")
+try:
+    cap = cv2.VideoCapture(current_dir + "/" + video_name)
+    if cap is not None and cap.isOpened():
+        print("VideoCapture successful!")
+except Exception:
+    traceback.print_exc(file=sys.stdout)