diff --git a/src-tauri/src/recorder_manager.rs b/src-tauri/src/recorder_manager.rs
index 6f0e4c4..9403df6 100644
--- a/src-tauri/src/recorder_manager.rs
+++ b/src-tauri/src/recorder_manager.rs
@@ -1362,7 +1362,7 @@ impl RecorderManager {
 
             futures::future::join_all(danmu_ass_files).await
         } else {
-            Vec::new()
+            vec![None; playlists.len()]
         };
 
         let timestamp = chrono::Local::now().format("%Y%m%d%H%M%S").to_string();