diff --git a/codec/h264/h264dec/decode.go b/codec/h264/h264dec/decode.go
index ac4ee928..d4d929e2 100644
--- a/codec/h264/h264dec/decode.go
+++ b/codec/h264/h264dec/decode.go
@@ -102,12 +102,10 @@ func decodePicOrderCntType0(vid *VideoStream, ctx *SliceContext) (topFieldOrderC
 
 	if !ctx.BottomField {
 		topFieldOrderCnt = vid.picOrderCntMsb + ctx.PicOrderCntLsb
+	} else if ctx.FieldPic {
+		bottomFieldOrderCnt = vid.picOrderCntMsb + ctx.PicOrderCntLsb
 	} else {
-		if !ctx.FieldPic {
-			bottomFieldOrderCnt = topFieldOrderCnt + ctx.DeltaPicOrderCntBottom
-		} else {
-			bottomFieldOrderCnt = vid.picOrderCntMsb + ctx.PicOrderCntLsb
-		}
+		bottomFieldOrderCnt = topFieldOrderCnt + ctx.DeltaPicOrderCntBottom
 	}
 	return
 }
@@ -154,10 +152,10 @@ func decodePicOrderCntType1(vid *VideoStream, ctx *SliceContext) (topFieldOrderC
 	if !ctx.FieldPic {
 		topFieldOrderCnt = expectedPicOrderCnt + ctx.DeltaPicOrderCnt[0]
 		bottomFieldOrderCnt = topFieldOrderCnt + int(ctx.OffsetForTopToBottomField) + ctx.DeltaPicOrderCnt[1]
-	} else if !ctx.BottomField {
-		topFieldOrderCnt = expectedPicOrderCnt + ctx.DeltaPicOrderCnt[0]
-	} else {
+	} else if ctx.BottomField {
 		bottomFieldOrderCnt = expectedPicOrderCnt + int(ctx.OffsetForTopToBottomField) + ctx.DeltaPicOrderCnt[0]
+	} else {
+		topFieldOrderCnt = expectedPicOrderCnt + ctx.DeltaPicOrderCnt[0]
 	}
 	return
 }