Register a new custom #GstMeta implementation, backed by an opaque
structure holding a #GstStructure.
The registered info can be retrieved later with gst.meta.Meta.getInfo by using
name as the key.
The backing #GstStructure can be retrieved with
gst.custom_meta.CustomMeta.getStructure, its mutability is conditioned by the
writability of the buffer the meta is attached to.
When transform_func is null, the meta and its backing #GstStructure
will always be copied when the transform operation is copy, other operations
are discarded, copy regions are ignored.
Register a new custom #GstMeta implementation, backed by an opaque structure holding a #GstStructure.
The registered info can be retrieved later with gst.meta.Meta.getInfo by using name as the key.
The backing #GstStructure can be retrieved with gst.custom_meta.CustomMeta.getStructure, its mutability is conditioned by the writability of the buffer the meta is attached to.
When transform_func is null, the meta and its backing #GstStructure will always be copied when the transform operation is copy, other operations are discarded, copy regions are ignored.