diff --git a/mediastreammodel.go b/mediastreammodel.go
index 5c52857..de7dc1f 100644
--- a/mediastreammodel.go
+++ b/mediastreammodel.go
@@ -58,21 +58,39 @@ func (e *Package) MediaRequestAliveVideo(token int, camNo int64, Sid string, ser
 
 // main server util
 func (e *Package) MediaRequestRemotePlayback(token int, serial string, session string, camNo int, date string, begin_time string, end_time string, serverId int) {
-	e.Payload = map[string]any{
-		"MODULE":    "MEDIASTREAMMODEL",
-		"OPERATION": "REQUESTREMOTEPLAYBACK",
-		"PARAMETER": map[string]any{
-			"STREAMNAME": "PLAYBACK" + "_" + fmt.Sprint(serial) + "_" + fmt.Sprint(camNo) + "_" + fmt.Sprint(serverId),
-			"STREAMTYPE": 1, // main stream
-			"VIDEOTYPE":  2, // common files
-			"CHANNEL":    1 << (camNo - 1),
-			"STARTTIME":  date + begin_time,
-			// "ENDTIME":    date + end_time,
-			"IPANDPORT": ip + ":12092",
-			"SERIAL":    token,
-			"PBST":      0,
-		},
-		"SESSION": session,
+	if end_time == "" {
+		e.Payload = map[string]any{
+			"MODULE":    "MEDIASTREAMMODEL",
+			"OPERATION": "REQUESTREMOTEPLAYBACK",
+			"PARAMETER": map[string]any{
+				"STREAMNAME": "PLAYBACK" + "_" + fmt.Sprint(serial) + "_" + fmt.Sprint(camNo) + "_" + fmt.Sprint(serverId),
+				"STREAMTYPE": 1, // main stream
+				"VIDEOTYPE":  2, // common files
+				"CHANNEL":    1 << (camNo - 1),
+				"STARTTIME":  date + begin_time,
+				"IPANDPORT":  ip + ":12092",
+				"SERIAL":     token,
+				"PBST":       0,
+			},
+			"SESSION": session,
+		}
+	} else {
+		e.Payload = map[string]any{
+			"MODULE":    "MEDIASTREAMMODEL",
+			"OPERATION": "REQUESTREMOTEPLAYBACK",
+			"PARAMETER": map[string]any{
+				"STREAMNAME": "PLAYBACK" + "_" + fmt.Sprint(serial) + "_" + fmt.Sprint(camNo) + "_" + fmt.Sprint(serverId),
+				"STREAMTYPE": 1, // main stream
+				"VIDEOTYPE":  2, // common files
+				"CHANNEL":    1 << (camNo - 1),
+				"STARTTIME":  date + begin_time,
+				"ENDTIME":    date + end_time,
+				"IPANDPORT":  ip + ":12092",
+				"SERIAL":     token,
+				"PBST":       0,
+			},
+			"SESSION": session,
+		}
 	}
 }