diff --git a/codec/h264/h264dec/pps.go b/codec/h264/h264dec/pps.go
index aeea8a60..67b1abf2 100644
--- a/codec/h264/h264dec/pps.go
+++ b/codec/h264/h264dec/pps.go
@@ -54,7 +54,7 @@ func NewPPS(br *bits.BitReader, chromaFormat int) (*PPS, error) {
 
 		if pps.SliceGroupMapType == 0 {
 			for iGroup := 0; iGroup <= pps.NumSliceGroupsMinus1; iGroup++ {
-				pps.RunLengthMinus1[iGroup] = int(r.readUe())
+				pps.RunLengthMinus1 = append(pps.RunLengthMinus1, int(r.readUe()))
 			}
 		} else if pps.SliceGroupMapType == 2 {
 			for iGroup := 0; iGroup < pps.NumSliceGroupsMinus1; iGroup++ {
@@ -115,8 +115,8 @@ func NewPPS(br *bits.BitReader, chromaFormat int) (*PPS, error) {
 					}
 				}
 			}
-			pps.SecondChromaQpIndexOffset = r.readSe()
 		}
+		pps.SecondChromaQpIndexOffset = r.readSe()
 		moreRBSPData(br)
 		// rbspTrailingBits()
 	}