fix bug

api/app/main.py

@@ -205,7 +205,14 @@ async def _apply_recording(enabled: bool) -> None:
   if _sanitize_cfg_fields(cfg):
     await store.save(cfg)
   try:
-    _set_recording_in_mediamtx_yml(enabled)
+    changed = _set_recording_in_mediamtx_yml(enabled)
+    if not changed:
+      return
+    try:
+      _restart_mediamtx()
+      logger.info("scheduler_applied_recording_and_restarted: enabled=%s", enabled)
+    except HTTPException as e:
+      logger.warning("scheduler_restart_mediamtx_failed: %s", e.detail)
   except Exception as e:
     logger.warning("scheduler_apply_recording_failed: %s", type(e).__name__)