diff --git a/wechat_ipad/client/message.py b/wechat_ipad/client/message.py
index 917bf0b..32e2955 100644
--- a/wechat_ipad/client/message.py
+++ b/wechat_ipad/client/message.py
@@ -251,7 +251,8 @@ class MessageMixin(WechatAPIClientBase):
         self.logging.info("开始发送视频: 对方wxid:{} 视频base64略 图片base64略 预计耗时:{}秒", wxid, predict_time)
 
         async with aiohttp.ClientSession() as session:
-            json_param = {"Wxid": self.wxid, "ToWxid": wxid, "Base64": vid_base64, "ImageBase64": image_base64,
+            json_param = {"Wxid": self.wxid, "ToWxid": wxid, "Base64": vid_base64,
+                          "ImageBase64": "data:image/jpeg;base64," + image_base64,
                           "PlayLength": duration}
             async with session.post(f'http://{self.ip}:{self.port}/api/Msg/SendVideo', json=json_param) as resp:
                 json_resp = await resp.json()