diff --git a/inc/rk_venc_cmd.h b/inc/rk_venc_cmd.h
index 251c055a..2d102433 100644
--- a/inc/rk_venc_cmd.h
+++ b/inc/rk_venc_cmd.h
@@ -149,6 +149,20 @@
  *   +                          +                 +                       +
  */
 
+/*
+ * base working mode parameter
+ */
+typedef enum MppEncBaseCfgChange_e {
+    MPP_ENC_BASE_CFG_CHANGE_LOW_DELAY   = (1 << 0),
+    MPP_ENC_BASE_CFG_CHANGE_ALL         = (0xFFFFFFFF),
+} MppEncBaseCfgChange;
+
+typedef struct MppEncBaseCfg_t {
+    RK_U32  change;
+
+    RK_S32  low_delay;
+} MppEncBaseCfg;
+
 /*
  * Rate control parameter
  */
diff --git a/mpp/base/mpp_enc_cfg.cpp b/mpp/base/mpp_enc_cfg.cpp
index 015470ee..a048ab65 100644
--- a/mpp/base/mpp_enc_cfg.cpp
+++ b/mpp/base/mpp_enc_cfg.cpp
@@ -149,6 +149,8 @@ static const char *cfg_func_names[] = {
     const_strlen( #base":"#name ) +
 
 #define ENTRY_TABLE(ENTRY)  \
+    /* base config */ \
+    ENTRY(base, low_delay,      S32, RK_S32,            MPP_ENC_BASE_CFG_CHANGE_LOW_DELAY,      base, low_delay) \
     /* rc config */ \
     ENTRY(rc,   mode,           S32, MppEncRcMode,      MPP_ENC_RC_CFG_CHANGE_RC_MODE,          rc, rc_mode) \
     ENTRY(rc,   bps_target,     S32, RK_S32,            MPP_ENC_RC_CFG_CHANGE_BPS,              rc, bps_target) \
@@ -263,7 +265,7 @@ RK_S32 const_strlen(const char* str)
     return *str ? 1 + const_strlen(str + 1) : 0;
 }
 
-static RK_S32 node_len = ENTRY_TABLE(EXPAND_AS_STRLEN) - 50;
+static RK_S32 node_len = ENTRY_TABLE(EXPAND_AS_STRLEN) - 40;
 
 class MppEncCfgService
 {
diff --git a/mpp/codec/mpp_enc_v2.cpp b/mpp/codec/mpp_enc_v2.cpp
index 40be6d96..0e384695 100644
--- a/mpp/codec/mpp_enc_v2.cpp
+++ b/mpp/codec/mpp_enc_v2.cpp
@@ -519,6 +519,23 @@ MPP_RET mpp_enc_proc_cfg(MppEncImpl *enc, MpiCmd cmd, void *param)
     MPP_RET ret = MPP_OK;
 
     switch (cmd) {
+    case MPP_ENC_SET_CFG : {
+        MppEncCfgImpl *impl = (MppEncCfgImpl *)param;
+        MppEncCfgSet *src = &impl->cfg;
+        RK_U32 change = src->base.change;
+
+        /* get base cfg here */
+        if (change) {
+            MppEncCfgSet *dst = &enc->cfg;
+
+            if (change & MPP_ENC_BASE_CFG_CHANGE_LOW_DELAY)
+                dst->base.low_delay = src->base.low_delay;
+
+            src->base.change = 0;
+        }
+
+        ret = enc_impl_proc_cfg(enc->impl, cmd, param);
+    } break;
     case MPP_ENC_GET_HDR_SYNC :
     case MPP_ENC_GET_EXTRA_INFO : {
         /*
diff --git a/mpp/inc/mpp_enc_cfg.h b/mpp/inc/mpp_enc_cfg.h
index 6642109d..14a15efd 100644
--- a/mpp/inc/mpp_enc_cfg.h
+++ b/mpp/inc/mpp_enc_cfg.h
@@ -29,6 +29,8 @@
  * For normal user rc and prep config are enough.
  */
 typedef struct MppEncCfgSet_t {
+    MppEncBaseCfg       base;
+
     // esential config
     MppEncPrepCfg       prep;
     MppEncRcCfg         rc;