diff --git a/service/tool.go b/service/tool.go
index 650af22..8da0661 100644
--- a/service/tool.go
+++ b/service/tool.go
@@ -182,6 +182,7 @@ func getVideoFrame(device proto.DeviceInfo) {
 	lineType := 2
 	z := 0
 	var frame gocv.Mat
+	frame = gocv.NewMat()
 	for {
 		if device.LogFrame > 0 && z%device.LogFrame == 0 {
 			log.Printf("设备:%d 当前帧: %d\n", device.ID, z)
@@ -189,10 +190,6 @@ func getVideoFrame(device proto.DeviceInfo) {
 		if device.NextStop {
 			break
 		}
-		if frame.Empty() {
-			frame = gocv.NewMat()
-		}
-		frame = gocv.NewMat()
 		ok := webcam.Read(&frame)
 		if !ok {
 			log.Printf("设备:%v 错误: 无法从视频流中读取帧\n", device)