Update app.py

app.py

@@ -923,7 +923,7 @@ def generate(
 
     chunk_first_frame = None
     given_video = None
-    video_condition_mode = "blended"
+    video_condition_mode = "locked"
     if chunk_advance:
         if MOMENTUM_PIPE is not None and float(momentum) > 0:
             given_video = _trailing_frames(chunk_state["paths"][-1], float(momentum))