diff --git a/mpp/codec/enc/h264/h264e_dpb.c b/mpp/codec/enc/h264/h264e_dpb.c
index 64df980e..8cbfc7d0 100644
--- a/mpp/codec/enc/h264/h264e_dpb.c
+++ b/mpp/codec/enc/h264/h264e_dpb.c
@@ -357,6 +357,7 @@ void h264e_dpb_build_marking(H264eDpb *dpb)
     }
 
     marking->idr_flag = 0;
+    marking->long_term_reference_flag = 0;
     marking->adaptive_ref_pic_buffering = 0;
 
     h264e_dbg_dpb("frm %d ref %d lt %d T%d\n",
@@ -415,6 +416,8 @@ MPP_RET h264e_dpb_proc(H264eDpb *dpb, EncCpbStatus *cpb)
             frames[i].status.valid = 0;
         }
         dpb->used_size = 0;
+        dpb->curr_max_lt_idx = 0;
+        dpb->next_max_lt_idx = 0;
     }
 
     if (h264e_debug & H264E_DBG_DPB)
diff --git a/mpp/codec/enc/h264/h264e_slice.c b/mpp/codec/enc/h264/h264e_slice.c
index 6091f4cc..55a2058e 100644
--- a/mpp/codec/enc/h264/h264e_slice.c
+++ b/mpp/codec/enc/h264/h264e_slice.c
@@ -191,9 +191,6 @@ void write_marking(MppWriteCtx *s, H264eMarkingInfo *marking)
         mpp_writer_put_bits(s, marking->long_term_reference_flag, 1);
         h264e_dbg_slice("used bit %2d long_term_reference_flag %d\n",
                         mpp_writer_bits(s), marking->long_term_reference_flag);
-
-        // clear long_term_reference_flag flag
-        marking->long_term_reference_flag = 0;
     } else {
         h264e_dbg_mmco("mmco count %d\n", marking->wr_cnt);
 
@@ -907,6 +904,8 @@ RK_S32 h264e_slice_write_prefix_nal_unit_svc(H264ePrefixNal *prefix, void *p, RK
         mpp_writer_trailing(s);
     }
 
+    mpp_writer_flush(s);
+
     bitCnt = s->buffered_bits + s->byte_cnt * 8;
 
     return bitCnt;