diff --git a/container/mts/mpegts.go b/container/mts/mpegts.go
index d0121a6c..b590b8d3 100644
--- a/container/mts/mpegts.go
+++ b/container/mts/mpegts.go
@@ -319,9 +319,9 @@ func DiscontinuityIndicator(f bool) Option {
 }
 
 // GetPTSRange retreives the first and last PTS of an MPEGTS clip.
-func GetPTSRange(clip []byte, pidType uint16) (pts [2]uint64, err error) {
+func GetPTSRange(clip []byte, pid uint16) (pts [2]uint64, err error) {
 	// Find the first packet with PID pidType.
-	pkt, _, err := FindPid(clip, pidType)
+	pkt, _, err := FindPid(clip, pid)
 	if err != nil {
 		return [2]uint64{}, err
 	}
@@ -345,7 +345,7 @@ func GetPTSRange(clip []byte, pidType uint16) (pts [2]uint64, err error) {
 	// Get the final PTS searching from end of clip for access unit start.
 	for i := len(clip) - PacketSize; i >= 0; i -= PacketSize {
 		copy(_pkt[:], clip[i:i+PacketSize])
-		if packet.PayloadUnitStartIndicator(&_pkt) && uint16(_pkt.PID()) == pidType {
+		if packet.PayloadUnitStartIndicator(&_pkt) && uint16(_pkt.PID()) == pid {
 			payload, err = packet.Payload(&_pkt)
 			if err != nil {
 				return [2]uint64{}, err