diff --git a/format/rtsp/client.go b/format/rtsp/client.go
index ffce200..1e54ce6 100644
--- a/format/rtsp/client.go
+++ b/format/rtsp/client.go
@@ -805,8 +805,14 @@ func (self *Stream) makeCodecData() (err error) {
 				err = fmt.Errorf("rtsp: aac sdp config invalid: %s", err)
 				return
 			}
+		case av.OPUS:
+			channelLayout := av.CH_MONO
+			if media.ChannelCount == 2 {
+				channelLayout = av.CH_STEREO
+			}
+
+			self.CodecData = codec.NewOpusCodecData(media.TimeScale, channelLayout)
 		default:
-			//log.Fatalln("Fix Format may be raw PCM 97", media.PayloadType, media.Type)
 			err = fmt.Errorf("rtsp: Type=%d unsupported", media.Type)
 			return
 		}
diff --git a/format/rtspv2/client.go b/format/rtspv2/client.go
index 8b953c2..f3cad8f 100644
--- a/format/rtspv2/client.go
+++ b/format/rtspv2/client.go
@@ -736,7 +736,7 @@ func (client *RTSPClient) RTPDemuxer(payloadRAW *[]byte) ([]*av.Packet, bool) {
 					if _, _, _, _, err := aacparser.ParseADTSHeader(frame); err == nil {
 						frame = frame[7:]
 					}
-					duration = time.Duration((float32(1024)/float32(client.AudioTimeScale))*1000) * time.Millisecond
+					duration = time.Duration((float32(1024)/float32(client.AudioTimeScale))*1000*1000*1000) * time.Nanosecond
 					client.AudioTimeLine += duration
 					retmap = append(retmap, &av.Packet{
 						Data:            frame,