diff --git a/mpp/hal/rkenc/h264e/hal_h264e_vepu580.c b/mpp/hal/rkenc/h264e/hal_h264e_vepu580.c
index d3b9d841..19714498 100644
--- a/mpp/hal/rkenc/h264e/hal_h264e_vepu580.c
+++ b/mpp/hal/rkenc/h264e/hal_h264e_vepu580.c
@@ -589,6 +589,9 @@ static MPP_RET hal_h264e_vepu580_get_task(void *hal, HalEncTask *task)
         //store async encode TSVC info
         if (ctx->prefix)
             memcpy(prefix, ctx->prefix, sizeof(H264ePrefixNal));
+        else
+            prefix = NULL;
+
         if (ctx->slice) {
             memcpy(slice, ctx->slice, sizeof(H264eSlice));
 
diff --git a/utils/mpi_enc_utils.c b/utils/mpi_enc_utils.c
index 4ede6454..98ed14f7 100644
--- a/utils/mpi_enc_utils.c
+++ b/utils/mpi_enc_utils.c
@@ -852,7 +852,7 @@ MPP_RET mpi_enc_gen_smart_gop_ref_cfg(MppEncRefCfg ref, RK_S32 gop_len, RK_S32 v
     /* st 1 layer 1 - non-ref */
     if (vi_len > 1) {
         st_ref[pos].is_non_ref  = 0;
-        st_ref[pos].temporal_id = 1;
+        st_ref[pos].temporal_id = 0;
         st_ref[pos].ref_mode    = REF_TO_PREV_REF_FRM;
         st_ref[pos].ref_arg     = 0;
         st_ref[pos].repeat      = vi_len - 2;