diff --git a/handlers/finalize_mp4.py b/handlers/finalize_mp4.py
index fe9f0cf..d494d18 100644
--- a/handlers/finalize_mp4.py
+++ b/handlers/finalize_mp4.py
@@ -127,9 +127,9 @@ class FinalizeMp4Handler(BaseHandler):
         concat_file = os.path.join(work_dir, 'concat.txt')
         with open(concat_file, 'w', encoding='utf-8') as f:
             for ts_file in ts_files:
-                # 路径中的反斜杠需要转义或使用正斜杠
-                ts_path = ts_file.replace('\\', '/')
-                f.write(f"file '{ts_path}'\n")
+                # FFmpeg concat 路径相对于 concat.txt 所在目录，只需写文件名
+                ts_filename = os.path.basename(ts_file)
+                f.write(f"file '{ts_filename}'\n")
 
         # 3. 构建合并命令（remux，不重编码）
         cmd = [