diff --git a/handler/tool.go b/handler/tool.go
index 3633a98..ffa136e 100644
--- a/handler/tool.go
+++ b/handler/tool.go
@@ -129,16 +129,19 @@ func GetVideoStream(c *gin.Context) {
 			_, err = w.Write([]byte("--frame\r\nContent-Type: image/jpeg\r\n\r\n"))
 			if err != nil {
 				fmt.Printf("写入头部信息错误: %v\n", err)
+				buf = nil
 				return false
 			}
 			_, err = w.Write(buf)
 			if err != nil {
 				fmt.Printf("写入帧数据错误: %v\n", err)
+				buf = nil
 				return false
 			}
 			_, err = w.Write([]byte("\r\n"))
 			if err != nil {
 				fmt.Printf("写入帧结束标记错误: %v\n", err)
+				buf = nil
 				return false
 			}
 			time.Sleep(50 * time.Millisecond) // 控制帧率，模拟每秒约20帧，可按实际调整