diff --git a/stream/mts/encoder.go b/stream/mts/encoder.go
index c1715761..b9189c4b 100644
--- a/stream/mts/encoder.go
+++ b/stream/mts/encoder.go
@@ -86,7 +86,7 @@ type Encoder struct {
 	clock         time.Duration
 	frameInterval time.Duration
 	ptsOffset     time.Duration
-	tsSpace       [mpegTsSize]byte
+	tsSpace       [PktLen]byte
 	pesSpace      [pes.MaxPesSize]byte
 
 	psiCount int
@@ -160,7 +160,7 @@ func (e *Encoder) Encode(nalu []byte) error {
 			}
 		}
 		e.psiCount--
-		_, err := e.dst.Write(pkt.Bytes(e.tsSpace[:mpegTsSize]))
+		_, err := e.dst.Write(pkt.Bytes(e.tsSpace[:PktLen]))
 		if err != nil {
 			return err
 		}
@@ -182,7 +182,7 @@ func (e *Encoder) writePSI() error {
 		AFC:     hasPayload,
 		Payload: addPadding(patTable),
 	}
-	_, err := e.dst.Write(patPkt.Bytes(e.tsSpace[:mpegTsSize]))
+	_, err := e.dst.Write(patPkt.Bytes(e.tsSpace[:PktLen]))
 	if err != nil {
 		return err
 	}
@@ -205,7 +205,7 @@ func (e *Encoder) writePSI() error {
 		AFC:     hasPayload,
 		Payload: addPadding(pmtTable),
 	}
-	_, err = e.dst.Write(pmtPkt.Bytes(e.tsSpace[:mpegTsSize]))
+	_, err = e.dst.Write(pmtPkt.Bytes(e.tsSpace[:PktLen]))
 	if err != nil {
 		return err
 	}
diff --git a/stream/mts/mpegts.go b/stream/mts/mpegts.go
index 482ea6b0..427a4640 100644
--- a/stream/mts/mpegts.go
+++ b/stream/mts/mpegts.go
@@ -33,8 +33,8 @@ import (
 )
 
 const (
-	mpegTsSize        = 188
-	mpegtsPayloadSize = 176
+	PktLen     = 188
+	PayloadLen = 176
 )
 
 /*
@@ -130,13 +130,13 @@ type Packet struct {
 // FindPMT will take a clip of mpegts and try to find a PMT table - if one
 // is found, then it is returned, otherwise nil and an error is returned.
 func FindPMT(d []byte) (p []byte, err error) {
-	if len(d) < mpegTsSize {
+	if len(d) < PktLen {
 		return nil, errors.New("Mmpegts data not of valid length")
 	}
-	for i := 0; i < len(d); i += mpegTsSize {
+	for i := 0; i < len(d); i += PktLen {
 		pid := (uint16(d[i+1]&0x1f) << 8) | uint16(d[i+2])
 		if pid == pmtPid {
-			p = d[i+4 : i+mpegTsSize]
+			p = d[i+4 : i+PktLen]
 			return
 		}
 	}
@@ -148,7 +148,7 @@ func FindPMT(d []byte) (p []byte, err error) {
 func (p *Packet) FillPayload(data []byte) int {
 	currentPktLength := 6 + asInt(p.PCRF)*6 + asInt(p.OPCRF)*6 +
 		asInt(p.SPF)*1 + asInt(p.TPDF)*1 + len(p.TPD)
-	p.Payload = make([]byte, mpegtsPayloadSize-currentPktLength)
+	p.Payload = make([]byte, PayloadLen-currentPktLength)
 	return copy(p.Payload, data)
 }
 
@@ -169,8 +169,8 @@ func asByte(b bool) byte {
 // ToByteSlice interprets the fields of the ts packet instance and outputs a
 // corresponding byte slice
 func (p *Packet) Bytes(buf []byte) []byte {
-	if buf == nil || cap(buf) != mpegTsSize {
-		buf = make([]byte, 0, mpegTsSize)
+	if buf == nil || cap(buf) != PktLen {
+		buf = make([]byte, 0, PktLen)
 	}
 	buf = buf[:0]
 	stuffingLength := 182 - len(p.Payload) - len(p.TPD) - asInt(p.PCRF)*6 -