Gets the metadata for api on buffer. When there is no such metadata, null is
returned. If multiple metadata with the given api are attached to this
buffer only the first one is returned. To handle multiple metadata with a
given API use gst.buffer.Buffer.iterateMeta or gst.buffer.Buffer.foreachMeta instead
and check the meta->info.api member for the API type.
Gets the metadata for api on buffer. When there is no such metadata, null is returned. If multiple metadata with the given api are attached to this buffer only the first one is returned. To handle multiple metadata with a given API use gst.buffer.Buffer.iterateMeta or gst.buffer.Buffer.foreachMeta instead and check the meta->info.api member for the API type.