Update app.py

app.py

@@ -128,15 +128,15 @@ def infer(url_in,interpolation,fps_output):
 
     depth_map = cv2.VideoCapture(final_vid)
 
-    ret, frame1 = depth_map.read()
-    prvs = cv2.cvtColor(frame1, cv2.COLOR_RGB2GRAY)
+    ret, fr1 = depth_map.read()
+    prvs = cv2.cvtColor(fr1, cv2.COLOR_RGB2GRAY)
     res = prvs
     flow = res
     while(depth_map.isOpened()):
-      ret, frame2 = depth_map.read()
+      ret, fr2 = depth_map.read()
       if ret == False:
         break
-      nxt = cv2.cvtColor(frame2, cv2.COLOR_RGB2GRAY)
+      nxt = cv2.cvtColor(fr2, cv2.COLOR_RGB2GRAY)
       flow = cv2.calcOpticalFlowFarneback(prvs, nxt, None, 0.5, 3, 15, 3, 5, 1.2, 0)
       alpha = 1.0/len(frames_list)
       beta = (1.0 - alpha)