diff --git a/format/rtsp/client.go b/format/rtsp/client.go
index 4b0b901..0b3f5b2 100644
--- a/format/rtsp/client.go
+++ b/format/rtsp/client.go
@@ -828,7 +828,7 @@ func (self *Stream) handleH264Payload(timestamp uint32, packet []byte) (err erro
 	*/
 	switch {
 	default:
-		if naluType >= 1 && naluType <= 23 {
+		if naluType >= 1 && naluType <= 5 {
 			if naluType == 5 {
 				self.pkt.IsKeyFrame = true
 			}
@@ -844,8 +844,6 @@ func (self *Stream) handleH264Payload(timestamp uint32, packet []byte) (err erro
 			return
 		}
 
-	//case naluType == 6: // SEI ignored
-
 	case naluType == 7: // sps
 		if self.client != nil && self.client.DebugRtp {
 			fmt.Println("rtsp: got sps")