Update app.py

app.py

@@ -6,6 +6,7 @@ import torch
 import numpy as np
 from typing import List, Optional, Tuple, Union
 from PIL import Image
+from io import BytesIO
 from diffusers import HunyuanVideoPipeline, FlowMatchEulerDiscreteScheduler
 from diffusers.models.transformers.transformer_hunyuan_video import HunyuanVideoPatchEmbed, HunyuanVideoTransformer3DModel
 from diffusers.utils import export_to_video