diff --git a/src/video_check_biz.py b/src/video_check_biz.py
index 889403b..08f5b46 100644
--- a/src/video_check_biz.py
+++ b/src/video_check_biz.py
@@ -405,10 +405,11 @@ class VideoCheckBiz(BaseFaceBiz):
         # 创建输出路径
         video_dir = os.path.dirname(video_path)
         video_name = os.path.splitext(os.path.basename(video_path))[0]
-        output_path = os.path.join(video_dir, f"{video_name}{suffix}.mp4")
+        output_path = os.path.join(video_dir, f"{video_name}{suffix}.webm")
         
         # 创建视频写入器，使用计算出的目标帧率
-        fourcc = cv2.VideoWriter_fourcc(*'mp4v')
+        # 使用WebM格式（VP8编码），现代浏览器原生支持
+        fourcc = cv2.VideoWriter_fourcc(*'VP80')
         out = cv2.VideoWriter(output_path, fourcc, target_fps, (width, height))
         
         if not out.isOpened():
@@ -535,10 +536,11 @@ class VideoCheckBiz(BaseFaceBiz):
         # 创建输出路径
         video_dir = os.path.dirname(video_path)
         video_name = os.path.splitext(os.path.basename(video_path))[0]
-        output_path = os.path.join(video_dir, f"{video_name}{suffix}.mp4")
+        output_path = os.path.join(video_dir, f"{video_name}{suffix}.webm")
         
         # 创建视频写入器
-        fourcc = cv2.VideoWriter_fourcc(*'mp4v')
+        # 使用WebM格式（VP8编码），现代浏览器原生支持
+        fourcc = cv2.VideoWriter_fourcc(*'VP80')
         out = cv2.VideoWriter(output_path, fourcc, fps, (width, height))
         
         if not out.isOpened():