Update app.py

app.py

@@ -137,13 +137,13 @@ def generate_video(
     start_image_pil,
     end_image_pil,
     prompt,
-    negative_prompt,
-    duration_seconds,
-    steps,
-    guidance_scale,
-    guidance_scale_2,
-    seed,
-    randomize_seed,
+    negative_prompt=default_negative_prompt,
+    duration_seconds=2.1,
+    steps=8,
+    guidance_scale=1,
+    guidance_scale_2=1,
+    seed=42,
+    randomize_seed=False,
     progress=gr.Progress(track_tqdm=True)
 ):
     """