When a BBB recording is created, metadata is transferred to the BBB server by the Opencast Recordings Handler, which allows a further processing of the recordings in Opencast and a reintegration in OpenOlat. Currently this metadata is handed over in the "join" API call. This call has no "meta-parameter" at all - https://docs.bigbluebutton.org/dev/api.html#join - so the data cannot be processed.
(See the attached access log.)
Solution: All metadata must be included in the create call: https://docs.bigbluebutton.org/dev/api.html#create
Please also use the agreed nomenclature meta_opencast for the metadata