diff --git a/format/rtspv2/client.go b/format/rtspv2/client.go
index 4cee103..d32e207 100644
--- a/format/rtspv2/client.go
+++ b/format/rtspv2/client.go
@@ -587,7 +587,8 @@ func (client *RTSPClient) RTPDemuxer(payloadRAW *[]byte) ([]*av.Packet, bool) {
 		if timestamp-client.PreVideoTS < 0 {
 			//var ui32 uint64 = math.MaxUint32
 			if math.MaxUint32-client.PreVideoTS < 90*100 { //100 ms
-				client.PreVideoTS = math.MaxUint32 - client.PreVideoTS
+				client.PreVideoTS = 0
+				client.PreVideoTS -= (math.MaxUint32 - client.PreVideoTS)
 			} else {
 				client.PreVideoTS = 0
 			}