Update app.py

app.py

@@ -6,6 +6,19 @@ import gradio as gr
 import cv2
 import numpy as np
 from PIL import Image
+import subprocess
+
+def ensure_wan():
+    try:
+        import wan  # noqa
+        print("[setup] wan already installed.")
+    except ImportError:
+        cmd = "pip install --no-build-isolation 'wan@git+https://github.com/Wan-Video/Wan2.1'"
+        env = dict(os.environ)
+        print(f"[setup] Installing wan2.1: {cmd}")
+        subprocess.run(cmd, shell=True, check=True, env=env)
+
+ensure_wan()
 
 os.makedirs("./sam2/SAM2-Video-Predictor/checkpoints/", exist_ok=True)