diff --git a/inc/rk_venc_cmd.h b/inc/rk_venc_cmd.h
index 95b622ba..6569f10d 100644
--- a/inc/rk_venc_cmd.h
+++ b/inc/rk_venc_cmd.h
@@ -160,6 +160,7 @@ typedef enum MppEncRcCfgChange_e {
     MPP_ENC_RC_CFG_CHANGE_GOP           = (1 << 7),
     MPP_ENC_RC_CFG_CHANGE_SKIP_CNT      = (1 << 8),
     MPP_ENC_RC_CFG_CHANGE_MAX_REENC     = (1 << 9),
+    MPP_ENC_RC_CFG_CHANGE_DROP_FRM      = (1 << 10),
     MPP_ENC_RC_CFG_CHANGE_ALL           = (0xFFFFFFFF),
 } MppEncRcCfgChange;
 
@@ -181,6 +182,13 @@ typedef enum MppEncRcQuality_e {
     MPP_ENC_RC_QUALITY_BUTT
 } MppEncRcQuality;
 
+typedef enum MppEncRcDropFrmMode_e {
+    MPP_ENC_RC_DROP_FRM_DISABLED,
+    MPP_ENC_RC_DROP_FRM_NORMAL,
+    MPP_ENC_RC_DROP_FRM_PSKIP,
+    MPP_ENC_RC_DROP_FRM_BUTT
+} MppEncRcDropFrmMode;
+
 typedef struct MppEncRcCfg_t {
     RK_U32  change;
 
@@ -287,6 +295,30 @@ typedef struct MppEncRcCfg_t {
      * stat_times   - the time of bitrate statistics
      */
     RK_S32  stat_times;
+
+    /*
+     * drop frame parameters
+     * used on bitrate is far over the max bitrate
+     *
+     * drop_mode
+     *
+     * MPP_ENC_RC_DROP_FRM_DISABLED
+     * - do not drop frame when bitrate overflow.
+     * MPP_ENC_RC_DROP_FRM_NORMAL
+     * - do not encode the dropped frame when bitrate overflow.
+     * MPP_ENC_RC_DROP_FRM_PSKIP
+     * - encode a all skip frame when bitrate overflow.
+     *
+     * drop_threshold
+     *
+     * The percentage threshold over max_bitrate for trigger frame drop.
+     *
+     * drop_gap
+     * The max continuous frame drop number
+     */
+    MppEncRcDropFrmMode drop_mode;
+    RK_U32  drop_threshold;
+    RK_U32  drop_gap;
 } MppEncRcCfg;
 
 /*
diff --git a/mpp/base/mpp_enc_cfg.cpp b/mpp/base/mpp_enc_cfg.cpp
index 6af0d1e0..0e42bc27 100644
--- a/mpp/base/mpp_enc_cfg.cpp
+++ b/mpp/base/mpp_enc_cfg.cpp
@@ -162,6 +162,9 @@ static const char *cfg_func_names[] = {
     ENTRY(rc,   fps_out_denorm, S32, RK_S32,            MPP_ENC_RC_CFG_CHANGE_FPS_OUT,          rc, fps_out_denorm) \
     ENTRY(rc,   gop,            S32, RK_S32,            MPP_ENC_RC_CFG_CHANGE_GOP,              rc, gop) \
     ENTRY(rc,   max_reenc_times,U32, RK_U32,            MPP_ENC_RC_CFG_CHANGE_MAX_REENC,        rc, max_reenc_times) \
+    ENTRY(rc,   drop_mode,      U32, MppEncRcDropFrmMode, MPP_ENC_RC_CFG_CHANGE_DROP_FRM,       rc, drop_mode) \
+    ENTRY(rc,   drop_thd,       U32, RK_U32,            MPP_ENC_RC_CFG_CHANGE_DROP_FRM,         rc, drop_threshold) \
+    ENTRY(rc,   drop_gap,       U32, RK_U32,            MPP_ENC_RC_CFG_CHANGE_DROP_FRM,         rc, drop_gap) \
     /* prep config */ \
     ENTRY(prep, width,          S32, RK_S32,            MPP_ENC_PREP_CFG_CHANGE_INPUT,          prep, width) \
     ENTRY(prep, height,         S32, RK_S32,            MPP_ENC_PREP_CFG_CHANGE_INPUT,          prep, height) \
@@ -245,7 +248,7 @@ 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) - 47;
+static RK_S32 node_len = ENTRY_TABLE(EXPAND_AS_STRLEN) - 53;
 
 class MppEncCfgService
 {