diff --git a/container/mts/encoder.go b/container/mts/encoder.go
index 3249ce56..693b0be3 100644
--- a/container/mts/encoder.go
+++ b/container/mts/encoder.go
@@ -150,10 +150,12 @@ type Encoder struct {
 func NewEncoder(dst io.WriteCloser, rate float64, mediaType int) *Encoder {
 	var mPid int
 	var sid byte
+	nbp := true
 	switch mediaType {
 	case EncodeAudio:
 		mPid = AudioPid
 		sid = audioStreamID
+		nbp = false
 	case EncodeH265:
 		mPid = VideoPid
 		sid = H265ID
@@ -180,7 +182,7 @@ func NewEncoder(dst io.WriteCloser, rate float64, mediaType int) *Encoder {
 		writePeriod: time.Duration(float64(time.Second) / rate),
 		ptsOffset:   ptsOffset,
 
-		nalBasedPSI: true,
+		nalBasedPSI: nbp,
 
 		pktCount: 8,