diff --git a/packages/shared/ai_service.py b/packages/shared/ai_service.py
index 637053eb7..82f91a147 100755
--- a/packages/shared/ai_service.py
+++ b/packages/shared/ai_service.py
@@ -403,9 +403,9 @@ def _call_ai_cover_service(
                 frames = client.extract_frames(
                     video_url=primary_video_url,
                     strategy="SceneChange",  # 自动识别画面变化，选最佳帧
-                    max_frames=3,  # 减少到 3 帧，平衡速度和质量
-                    poll_interval=2.0,  # 缩短轮询间隔
-                    max_poll_attempts=60,  # 120秒超时
+                    max_frames=1,  # 只抽取 1 帧，速度优先
+                    poll_interval=1.0,  # 缩短轮询间隔到 1 秒
+                    max_poll_attempts=30,  # 60秒超时
                 )
 
                 if frames and len(frames) > 0: