Retrieve the next gstreamer.Meta 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 gstreamer.Meta of this type
The next gstreamer.Meta of type meta_api_type or NULL when there are no more items.
1.12
Retrieve the next gstreamer.Meta 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