Update app.py

app.py

@@ -141,6 +141,17 @@ def Piper(image,positive,negative,motion):
         last_motion = motion
 
     pipe.to(device)
+
+    if image == None:
+        return pipe(
+            positive,
+            negative_prompt=negative,
+            height=1024,
+            width=576,
+            num_inference_steps=step,
+            guidance_scale=1,
+            num_frames=(fps*time)
+        )
     
     return pipe(
         positive,