Fix live example loading: use gr.update and factory function for proper state update

app.py

@@ -149,13 +149,13 @@ def on_example_change(task_name, example_choice):
 MAX_FRAMES = 60  # 1fps × 60s = up to 60 frames
 
 
-def load_live_example(example_idx):
-    """Load a pre-built live example into the inference inputs."""
-    if example_idx is None or example_idx < 0 or example_idx >= len(LIVE_EXAMPLES):
-        return None, None, ""
-    ex = LIVE_EXAMPLES[example_idx]
-    images = [str(ROOT / fp) for fp in ex["frames"] if (ROOT / fp).exists()]
-    return None, images, ex["question"]
+def make_load_live_example(example_idx):
+    """Create a loader function for a specific live example index."""
+    def _load():
+        ex = LIVE_EXAMPLES[example_idx]
+        images = [str(ROOT / fp) for fp in ex["frames"] if (ROOT / fp).exists()]
+        return gr.update(value=None), gr.update(value=images), gr.update(value=ex["question"])
+    return _load
 
 
 def extract_frames_1fps(video_path: str, max_frames: int = MAX_FRAMES) -> list:
@@ -431,7 +431,7 @@ with gr.Blocks(
 
             for idx, btn in example_btns:
                 btn.click(
-                    fn=lambda i=idx: load_live_example(i),
+                    fn=make_load_live_example(idx),
                     inputs=[],
                     outputs=[video_input, image_input, infer_question],
                 )