diff --git a/pkg/base/avpacket.go b/pkg/base/avpacket.go
index 6fc61f25..15b1ec71 100644
--- a/pkg/base/avpacket.go
+++ b/pkg/base/avpacket.go
@@ -23,6 +23,7 @@ const (
 	AvPacketPtUnknown AvPacketPt = -1
 	AvPacketPtG711U   AvPacketPt = 0   // g711u
 	AvPacketPtG711A   AvPacketPt = 8   // g711a
+	AvPacketPtMp2     AvPacketPt = 14  // mp2
 	AvPacketPtAvc     AvPacketPt = 96  // h264
 	AvPacketPtHevc    AvPacketPt = 98  // h265
 	AvPacketPtAac     AvPacketPt = 97  // aac
diff --git a/pkg/rtsp/base_in_session.go b/pkg/rtsp/base_in_session.go
index 3c92b7c7..11a2fa97 100644
--- a/pkg/rtsp/base_in_session.go
+++ b/pkg/rtsp/base_in_session.go
@@ -359,7 +359,7 @@ func (session *BaseInSession) handleRtpPacket(b []byte) error {
 
 	packetType := int(b[1] & 0x7F)
 	if !session.sdpCtx.IsPayloadTypeOrigin(packetType) {
-		Log.Errorf("[%s] handleRtpPacket but type invalid. type=%d", session.UniqueKey(), packetType)
+		//Log.Errorf("[%s] handleRtpPacket but type invalid. type=%d", session.UniqueKey(), packetType)
 		return nazaerrors.Wrap(base.ErrRtsp)
 	}
 
diff --git a/pkg/sdp/parse_logic.go b/pkg/sdp/parse_logic.go
index b4ffa4d9..522b94f2 100644
--- a/pkg/sdp/parse_logic.go
+++ b/pkg/sdp/parse_logic.go
@@ -134,23 +134,30 @@ func ParseSdp2LogicContext(b []byte) (LogicContext, error) {
 			} else if strings.EqualFold(md.ARtpMap.EncodingName, ArtpMapEncodingNameOpus) {
 				ret.audioPayloadTypeBase = base.AvPacketPtOpus
 			} else {
-				if md.M.PT == 8 {
-					// ffmpeg推流情况下不会填充rtpmap字段,m中pt值为8也可以表示是PCMA,采样率默认为8000Hz
-					// RFC3551中表明G711A固定pt值为8
+				// ffmpeg推流情况下不会填充rtpmap字段,m中pt值为8也可以表示是PCMA,采样率默认为8000Hz
+				// RFC3551中表明G711A固定pt值为8
+				if md.M.PT == MediaDescPayloadTypeG711U {
+					ret.audioPayloadTypeBase = base.AvPacketPtG711U
+					ret.audioPayloadTypeOrigin = MediaDescPayloadTypeG711U
+					if ret.AudioClockRate == 0 {
+						ret.AudioClockRate = 8000
+					}
+				} else if md.M.PT == MediaDescPayloadTypeG711A {
 					ret.audioPayloadTypeBase = base.AvPacketPtG711A
-					ret.audioPayloadTypeOrigin = 8
+					ret.audioPayloadTypeOrigin = MediaDescPayloadTypeG711A
 					if ret.AudioClockRate == 0 {
 						ret.AudioClockRate = 8000
 					}
-				} else if md.M.PT == 0 {
-					// ffmpeg推流情况下不会填充rtpmap字段,m中pt值为8也可以表示是PCMU,采样率默认为8000Hz
-					// RFC3551中表明G711U固定pt值为0
-					ret.audioPayloadTypeBase = base.AvPacketPtG711U
-					ret.audioPayloadTypeOrigin = 0
+				} else if md.M.PT == MediaDescPayloadTypeMp2 {
+					ret.audioPayloadTypeBase = base.AvPacketPtMp2
+					ret.audioPayloadTypeOrigin = MediaDescPayloadTypeMp2
 					if ret.AudioClockRate == 0 {
 						ret.AudioClockRate = 8000
 					}
 				} else {
+					if md.M.PT != 0 {
+						Log.Warnf("unknown audio payload type. pt=%d", md.M.PT)
+					}
 					ret.audioPayloadTypeBase = base.AvPacketPtUnknown
 				}
 			}
diff --git a/pkg/sdp/sdp.go b/pkg/sdp/sdp.go
index 6e62be77..1b0a6882 100644
--- a/pkg/sdp/sdp.go
+++ b/pkg/sdp/sdp.go
@@ -8,6 +8,8 @@
 
 package sdp
 
+import "github.com/q191201771/lal/pkg/base"
+
 // rfc4566
 
 const (
@@ -18,3 +20,9 @@ const (
 	ARtpMapEncodingNameG711U = "PCMU"
 	ArtpMapEncodingNameOpus  = "opus"
 )
+
+const (
+	MediaDescPayloadTypeG711U = int(base.AvPacketPtG711U)
+	MediaDescPayloadTypeG711A = int(base.AvPacketPtG711A)
+	MediaDescPayloadTypeMp2   = int(base.AvPacketPtMp2)
+)