diff --git a/inc/mpp_buffer.h b/inc/mpp_buffer.h
index 26b8994c..5aa2bb9a 100644
--- a/inc/mpp_buffer.h
+++ b/inc/mpp_buffer.h
@@ -214,6 +214,9 @@ MPP_RET mpp_buffer_group_get(const char *tag, MppBufferMode mode, MppBufferGroup
 MPP_RET mpp_buffer_group_put(MppBufferGroup group);
 MPP_RET mpp_buffer_group_clear(MppBufferGroup group);
 RK_S32  mpp_buffer_group_unused(MppBufferGroup group);
+MppBufferMode mpp_buffer_group_mode(MppBufferGroup group);
+MppBufferType mpp_buffer_group_type(MppBufferGroup group);
+
 /*
  * size  : 0 - no limit, other - max buffer size
  * count : 0 - no limit, other - max buffer count
diff --git a/mpp/mpp.cpp b/mpp/mpp.cpp
index 702d77f4..b334c75c 100644
--- a/mpp/mpp.cpp
+++ b/mpp/mpp.cpp
@@ -152,7 +152,10 @@ void Mpp::clear()
         mPacketGroup = NULL;
     }
     if (mFrameGroup) {
-        mpp_buffer_group_put(mFrameGroup);
+        MppBufferMode mode = mpp_buffer_group_mode(mFrameGroup);
+        if (MPP_BUFFER_INTERNAL == mode) {
+            mpp_buffer_group_put(mFrameGroup);
+        }
         mFrameGroup = NULL;
     }
 }
diff --git a/mpp/mpp_buffer.cpp b/mpp/mpp_buffer.cpp
index b370b678..72af0a21 100644
--- a/mpp/mpp_buffer.cpp
+++ b/mpp/mpp_buffer.cpp
@@ -205,6 +205,28 @@ RK_S32  mpp_buffer_group_unused(MppBufferGroup group)
     return p->count_unused;
 }
 
+MppBufferMode mpp_buffer_group_mode(MppBufferGroup group)
+{
+    if (NULL == group) {
+        mpp_err_f("input invalid group %p\n", group);
+        return MPP_BUFFER_MODE_BUTT;
+    }
+
+    MppBufferGroupImpl *p = (MppBufferGroupImpl *)group;
+    return p->mode;
+}
+
+MppBufferType mpp_buffer_group_type(MppBufferGroup group)
+{
+    if (NULL == group) {
+        mpp_err_f("input invalid group %p\n", group);
+        return MPP_BUFFER_TYPE_BUTT;
+    }
+
+    MppBufferGroupImpl *p = (MppBufferGroupImpl *)group;
+    return p->type;
+}
+
 MPP_RET mpp_buffer_group_limit_config(MppBufferGroup group, size_t size, RK_S32 count)
 {
     if (NULL == group) {