diff --git a/container/mts/pes/pes.go b/container/mts/pes/pes.go
index b0e40f86..5b5cb612 100644
--- a/container/mts/pes/pes.go
+++ b/container/mts/pes/pes.go
@@ -26,6 +26,8 @@ LICENSE
 
 package pes
 
+import "github.com/Comcast/gots"
+
 const MaxPesSize = 64 * 1 << 10
 
 /*
@@ -108,16 +110,11 @@ func (p *Packet) Bytes(buf []byte) []byte {
 			boolByte(p.ACIF)<<2 | boolByte(p.CRCF)<<1 | boolByte(p.EF)),
 		p.HeaderLength,
 	}...)
+
 	if p.PDI == byte(2) {
-		pts := 0x2100010001 | (p.PTS&0x1C0000000)<<3 | (p.PTS&0x3FFF8000)<<2 |
-			(p.PTS&0x7FFF)<<1
-		buf = append(buf, []byte{
-			byte((pts & 0xFF00000000) >> 32),
-			byte((pts & 0x00FF000000) >> 24),
-			byte((pts & 0x0000FF0000) >> 16),
-			byte((pts & 0x000000FF00) >> 8),
-			byte(pts & 0x00000000FF),
-		}...)
+		ptsIdx := len(buf)
+		buf = buf[:ptsIdx+5]
+		gots.InsertPTS(buf[ptsIdx:], p.PTS)
 	}
 	buf = append(buf, append(p.Stuff, p.Data...)...)
 	return buf