Retrieve the next #GstMeta of type @meta_api_type after the current one according to @state. If @state points to %NULL, the first metadata of type @meta_api_type is returned.
@state will be updated with an opaque state pointer
an opaque state pointer
only return #GstMeta of this type
The next #GstMeta of type @meta_api_type or %NULL when there are no more items.
1.12
See Implementation
Retrieve the next #GstMeta of type @meta_api_type after the current one according to @state. If @state points to %NULL, the first metadata of type @meta_api_type is returned.
@state will be updated with an opaque state pointer