Update app.py

app.py

@@ -449,7 +449,7 @@ def optimize(v, d):
 
         dcolor = []
         for k, f in enumerate(frames):
-            frame = cv2.imread(frames[k]).convert('RGB').astype(np.uint8)
+            frame = cv2.cvtColor(cv2.imread(frames[k]).astype(np.uint8), cv2.COLOR_BGR2RGB)
             
             # convert to np.float32
             f = np.float32(frame.reshape((-1,3)))