diff --git a/Demo/FFmpegApi-Demo/demo1.lua b/Demo/FFmpegApi-Demo/demo1.lua
index 4a475f9..281d42f 100644
--- a/Demo/FFmpegApi-Demo/demo1.lua
+++ b/Demo/FFmpegApi-Demo/demo1.lua
@@ -23,9 +23,9 @@ local function Get_dfpwm_url(INPUT_URL,API_URL)
     if not response then error("HTTP Request Failure: "..(err or "Unknown error")) 
     else
         -- 读取响应 / Read response
-        local responseData = textutils.unserializeJSON(res.readAll())
+        local responseData = textutils.unserializeJSON(response.readAll())
         response.close()
-        
+
         --返回下载链接 / Return download URL
         if responseData.status ~= "success" then error("Conversion failed:"..(responseData.error or "Unknown error")) 
         else