diff --git a/drivers/video/v4l2_cap.c b/drivers/video/v4l2_cap.c
index 943a8e0b22b..690271584da 100644
--- a/drivers/video/v4l2_cap.c
+++ b/drivers/video/v4l2_cap.c
@@ -1174,9 +1174,9 @@ static void cleanup_streamresources(FAR capture_type_inf_t *type_inf,
   nxmutex_destroy(&type_inf->lock_state);
   if (type_inf->bufheap != NULL)
     {
-      if (cmng->imgdata->mem_ops && cmng->imgdata->mem_ops->mem_free)
+      if (cmng->imgdata->ops->free)
         {
-          cmng->imgdata->mem_ops->mem_free(type_inf->bufheap);
+          cmng->imgdata->ops->free(cmng->imgdata, type_inf->bufheap);
         }
       else
         {
@@ -2120,7 +2120,7 @@ static int capture_reqbufs(FAR struct v4l2_s *v4l2,
 {
   FAR capture_mng_t *cmng = (FAR capture_mng_t *)v4l2;
   FAR capture_type_inf_t *type_inf;
-  const imgdata_mem_ops_t *mem_ops = cmng->imgdata->mem_ops;
+  struct imgdata_s *imgdata = cmng->imgdata;
 
   irqstate_t flags;
   int ret = OK;
@@ -2158,9 +2158,9 @@ static int capture_reqbufs(FAR struct v4l2_s *v4l2,
         {
           if (type_inf->bufheap != NULL)
             {
-              if (mem_ops && mem_ops->mem_free)
+              if (imgdata->ops->free)
                 {
-                    mem_ops->mem_free(type_inf->bufheap);
+                    imgdata->ops->free(imgdata, type_inf->bufheap);
                 }
               else
                 {
@@ -2168,9 +2168,10 @@ static int capture_reqbufs(FAR struct v4l2_s *v4l2,
                 }
             }
 
-          if (mem_ops && mem_ops->mem_malloc)
+          if (imgdata->ops->alloc)
             {
-              type_inf->bufheap = mem_ops->mem_malloc(32, reqbufs->count *
+              type_inf->bufheap = imgdata->ops->alloc(imgdata, 32,
+                reqbufs->count *
                 get_bufsize(&type_inf->fmt[CAPTURE_FMT_MAIN]));
             }
           else
diff --git a/include/nuttx/video/imgdata.h b/include/nuttx/video/imgdata.h
index c0e18bd4fc1..5f9af45873b 100644
--- a/include/nuttx/video/imgdata.h
+++ b/include/nuttx/video/imgdata.h
@@ -83,14 +83,6 @@ typedef struct imgdata_interval_s
   uint32_t denominator;
 } imgdata_interval_t;
 
-/* Structure for memory operations */
-
-typedef struct imgdata_mem_ops_s
-{
-  CODE void *(*mem_malloc)(uint32_t align_size, uint32_t size);
-  CODE void (*mem_free)(void *data);
-} imgdata_mem_ops_t;
-
 typedef int (*imgdata_capture_t)(uint8_t result, uint32_t size,
                                  FAR const struct timeval *ts,
                                  FAR void *arg);
@@ -119,6 +111,14 @@ struct imgdata_ops_s
                             FAR imgdata_capture_t callback,
                             FAR void *arg);
   CODE int (*stop_capture)(FAR struct imgdata_s *data);
+
+  /* This is a pair of user define frame memory allocation interface.
+   * If both are NULL, just using system memory operations.
+   */
+
+  CODE void *(*alloc)(FAR struct imgdata_s *data,
+                           uint32_t align_size, uint32_t size);
+  CODE void (*free)(FAR struct imgdata_s *data, void *addr);
 };
 
 /* Image data private data.  This structure only defines the initial fields
@@ -129,7 +129,6 @@ struct imgdata_ops_s
 struct imgdata_s
 {
   FAR const struct imgdata_ops_s *ops;
-  FAR const struct imgdata_mem_ops_s *mem_ops;
 };
 
 #ifdef __cplusplus