diff --git a/inference_mp4_2x.py b/inference_mp4_2x.py
index c1e536a..5de612e 100644
--- a/inference_mp4_2x.py
+++ b/inference_mp4_2x.py
@@ -43,6 +43,7 @@ padding = (0, pw - w, 0, ph - h)
 tot_frame = videoCapture.get(cv2.CAP_PROP_FRAME_COUNT)
 print('{}.mp4, {} frames in total, {}FPS to {}FPS'.format(args.video[:-4], tot_frame, fps, args.fps))
 pbar = tqdm(total=tot_frame)
+cnt = 0
 if args.montage:
     frame = frame[:, left: left + w]
 while success:
@@ -55,8 +56,14 @@ while success:
         I1 = torch.from_numpy(np.transpose(frame, (2,0,1)).astype("float32") / 255.).to(device).unsqueeze(0)
         I0 = F.pad(I0, padding)
         I1 = F.pad(I1, padding)
-        if (F.interpolate(I0, (16, 16), mode='bilinear', align_corners=False)
-            - F.interpolate(I1, (16, 16), mode='bilinear', align_corners=False)).abs().mean() > 0.2:
+        p = (F.interpolate(I0, (16, 16), mode='bilinear', align_corners=False)
+             - F.interpolate(I1, (16, 16), mode='bilinear', align_corners=False)).abs().mean()
+        if p < 0.01:
+            print("Warning: Your video has {} static frames, it may change the duration of the generated video.".format(cnt))
+            cnt += 1
+            pbar.update(1)
+            continue
+        if p > 0.2:             
             mid1 = lastframe
         else:
             mid1 = model.inference(I0, I1)
@@ -66,7 +73,9 @@ while success:
             output.write(np.concatenate((lastframe, mid1[:h, :w]), 1))
         else:
             output.write(lastframe)
+            output.write(mid0[:h, :w])
             output.write(mid1[:h, :w])
+            output.write(mid2[:h, :w])
         pbar.update(1)
 if args.montage:
     output.write(np.concatenate((lastframe, lastframe), 1))
diff --git a/inference_mp4_4x.py b/inference_mp4_4x.py
index 20dd593..0ec65be 100644
--- a/inference_mp4_4x.py
+++ b/inference_mp4_4x.py
@@ -43,6 +43,7 @@ padding = (0, pw - w, 0, ph - h)
 tot_frame = videoCapture.get(cv2.CAP_PROP_FRAME_COUNT)
 print('{}.mp4, {} frames in total, {}FPS to {}FPS'.format(args.video[:-4], tot_frame, fps, args.fps))
 pbar = tqdm(total=tot_frame)
+cnt = 0
 if args.montage:
     frame = frame[:, left: left + w]
 while success:
@@ -55,8 +56,14 @@ while success:
         I1 = torch.from_numpy(np.transpose(frame, (2,0,1)).astype("float32") / 255.).to(device).unsqueeze(0)
         I0 = F.pad(I0, padding)
         I1 = F.pad(I1, padding)
-        if (F.interpolate(I0, (16, 16), mode='bilinear', align_corners=False)
-            - F.interpolate(I1, (16, 16), mode='bilinear', align_corners=False)).abs().mean() > 0.2:
+        p = (F.interpolate(I0, (16, 16), mode='bilinear', align_corners=False)
+             - F.interpolate(I1, (16, 16), mode='bilinear', align_corners=False)).abs().mean()
+        if p < 0.01:
+            print("Warning: Your video has {} static frames, it may change the duration of the generated video.".format(cnt))
+            cnt += 1
+            pbar.update(1)
+            continue
+        if p > 0.2:             
             mid0 = lastframe
             mid1 = lastframe
             mid2 = frame