diff --git a/mpp/codec/mpp_enc.cpp b/mpp/codec/mpp_enc.cpp
index d7137341..8879bdf7 100644
--- a/mpp/codec/mpp_enc.cpp
+++ b/mpp/codec/mpp_enc.cpp
@@ -21,6 +21,7 @@
 #include "mpp_env.h"
 #include "mpp_log.h"
 #include "mpp_mem.h"
+#include "mpp_common.h"
 
 #include "mpp_packet_impl.h"
 
@@ -258,9 +259,10 @@ void *mpp_enc_control_thread(void *data)
              * if there is available buffer in the input frame do encoding
              */
             if (NULL == packet) {
+                /* NOTE: set buffer w * h * 1.5 to avoid buffer overflow */
                 RK_U32 width  = enc->cfg.prep.width;
                 RK_U32 height = enc->cfg.prep.height;
-                RK_U32 size = width * height;
+                RK_U32 size = MPP_ALIGN(width, 16) * MPP_ALIGN(height, 16) * 3 / 2;
                 MppBuffer buffer = NULL;
 
                 mpp_assert(size);
diff --git a/mpp/codec/mpp_enc_v2.cpp b/mpp/codec/mpp_enc_v2.cpp
index 15eb325a..44b7aafb 100644
--- a/mpp/codec/mpp_enc_v2.cpp
+++ b/mpp/codec/mpp_enc_v2.cpp
@@ -629,9 +629,10 @@ void *mpp_enc_thread(void *data)
          * if there is available buffer in the input frame do encoding
          */
         if (NULL == packet) {
+            /* NOTE: set buffer w * h * 1.5 to avoid buffer overflow */
             RK_U32 width  = enc->cfg.prep.width;
             RK_U32 height = enc->cfg.prep.height;
-            RK_U32 size = width * height;
+            RK_U32 size = MPP_ALIGN(width, 16) * MPP_ALIGN(height, 16) * 3 / 2;
             MppBuffer buffer = NULL;
 
             mpp_assert(size);