diff --git a/wanvideo/wan_video_vae.py b/wanvideo/wan_video_vae.py
index 3fe2e14..a5758f1 100644
--- a/wanvideo/wan_video_vae.py
+++ b/wanvideo/wan_video_vae.py
@@ -271,7 +271,7 @@ class ResidualBlock(nn.Module):
             CausalConv3d(out_dim, out_dim, 3, padding=1))
         self.shortcut = CausalConv3d(in_dim, out_dim, 1) \
             if in_dim != out_dim else nn.Identity()
-        
+
     def forward(self, x, feat_cache=None, feat_idx=[0]):
         if self.cpu_cache:
             return self._forward_cpu_cache(x, feat_cache, feat_idx)
@@ -297,7 +297,7 @@ class ResidualBlock(nn.Module):
             else:
                 x = layer(x)
         return x + h
-    
+
     def _forward_cpu_cache(self, x, feat_cache=None, feat_idx=[0]):
         h = self.shortcut(x)
         for layer in self.residual:
@@ -307,11 +307,11 @@ class ResidualBlock(nn.Module):
                 if cache_x.shape[2] < 2 and feat_cache[idx] is not None:
                     cached_frame = feat_cache[idx][:, :, -1, :, :].unsqueeze(2).to(cache_x.device)
                     cache_x = torch.cat([cached_frame, cache_x], dim=2)
-                
+
                 prev_cache = feat_cache[idx].to(x.device) if feat_cache[idx] is not None else None
 
                 x = layer(x, prev_cache)
-                
+
                 feat_cache[idx] = cache_x.to("cpu", non_blocking=True)
                 feat_idx[0] += 1
             else:
@@ -1097,9 +1097,9 @@ class VideoVAE_(nn.Module):
     #modification originally by @raindrop313 https://github.com/raindrop313/ComfyUI-WanVideoStartEndFrames
     def decode_2(self, z):
         # z: [b,c,t,h,w]
-        
+
         z = z / self.inv_std.to(z) + self.mean.to(z)
-      
+
         iter_ = z.shape[2]
         z_head=z[:,:,:-1,:,:]
         z_tail=z[:,:,-1,:,:].unsqueeze(2)
@@ -1288,7 +1288,7 @@ class WanVideoVAE(nn.Module):
 
     def tiled_encode(self, video, device, tile_size, tile_stride, end_=False, pbar=True):
         _, _, T, H, W = video.shape
-        
+
         if tile_size is None and tile_stride is None:
             size_h, size_w = H //2, W // 2
             stride_h, stride_w = size_h // 2, size_w // 2
@@ -1492,7 +1492,7 @@ class VideoVAE38_(VideoVAE_):
         except:
             pass
         z = z / self.inv_std.to(z) + self.mean.to(z)
-       
+
         iter_ = z.shape[2]
         if pbar:
             pbar = ProgressBar(iter_)