* @meta: a #GstVideoMeta
* @plane: a plane
* @info: a #GstMapInfo
- * @data: the data of @plane
- * @stride: the stride of @plane
+ * @data: (out): the data of @plane
+ * @stride: (out): the stride of @plane
* @flags: @GstMapFlags
*
* Map the video plane with index @plane in @meta and return a pointer to the