diff --git a/video-ai-system/engines/subtitle-pipeline/ab-test-tools/subtitle-style-ab-test.py b/video-ai-system/engines/subtitle-pipeline/ab-test-tools/subtitle-style-ab-test.py
index 2691c4a..0620195 100644
--- a/video-ai-system/engines/subtitle-pipeline/ab-test-tools/subtitle-style-ab-test.py
+++ b/video-ai-system/engines/subtitle-pipeline/ab-test-tools/subtitle-style-ab-test.py
@@ -276,12 +276,13 @@ def burn_subtitles_with_ffmpeg(video_path: str, ass_path: str, output_path: str)
         return False
     
     # FFmpeg 命令
+    # 正确语法：subtitles=filename='path'  （需要 filename= 前缀）
     ass_path_escaped = ass_path.replace(":", "\\:").replace("'", "'\\''")
     
     cmd = [
         "ffmpeg", "-y",
         "-i", video_path,
-        "-vf", f"subtitles='{ass_path_escaped}'",
+        "-vf", f"subtitles=filename='{ass_path_escaped}'",
         "-c:v", "libx264",
         "-pix_fmt", "yuv420p",
         "-c:a", "copy",
diff --git a/video-ai-system/engines/subtitle-pipeline/reference-analysis/ass-subtitle-renderer.py b/video-ai-system/engines/subtitle-pipeline/reference-analysis/ass-subtitle-renderer.py
index 25d0f29..efca922 100644
--- a/video-ai-system/engines/subtitle-pipeline/reference-analysis/ass-subtitle-renderer.py
+++ b/video-ai-system/engines/subtitle-pipeline/reference-analysis/ass-subtitle-renderer.py
@@ -262,17 +262,14 @@ def burn_subtitles_with_ffmpeg(video_path: str, ass_path: str, output_path: str)
         print(f"[ERROR] ASS 字幕文件不存在：{ass_path}")
         return False
     
-    # FFmpeg 命令：使用 libass 烧录字幕
-    # -vf "ass=subtitles.ass"  # 方法1：直接指定 ASS 文件
-    # -vf "subtitles=subtitles.ass"  # 方法2：使用 subtitles 滤镜（自动检测格式）
-    
     # 使用 subtitles 滤镜（更通用，支持 SRT/ASS 等多种格式）
+    # 正确语法：subtitles=filename='path'  （需要 filename= 前缀）
     ass_path_escaped = ass_path.replace(":", "\\:").replace("'", "'\\''")
     
     cmd = [
         "ffmpeg", "-y",
         "-i", video_path,
-        "-vf", f"subtitles='{ass_path_escaped}'",
+        "-vf", f"subtitles=filename='{ass_path_escaped}'",
         "-c:v", "libx264",
         "-pix_fmt", "yuv420p",
         "-c:a", "copy",