diff --git a/video_frame_utils.py b/video_frame_utils.py
index c29016e..da33a56 100644
--- a/video_frame_utils.py
+++ b/video_frame_utils.py
@@ -173,6 +173,8 @@ def process_video_frame_extraction(data, file_registry, file_lock, task_id=None,
             '-i', temp_video,
             '-vf', vf,
             '-pix_fmt', 'rgb24',
+            '-compression_level', '9',
+            '-pred', 'mixed'
             '-stats',          # 关键：启用进度统计
             '-v', 'info',      # 确保输出级别足够
             frame_pattern