Update app.py

app.py

@@ -14,7 +14,7 @@ def generate_demo_gif(img1, img2):
 
     try:
         result = subprocess.run([
-            "python", "inference_img.py",
+            "3python", "inference_img.py",
             "--img", str(frame1_path), str(frame2_path),
             "--exp=4"
         ], capture_output=True, text=True)