Please observe the following notes on media sessions:
- A media session is terminated with the media actions eof, stop and init (init also creates a new media session in this request).
- With the same media ID and subsequent play follows, the old media session is continued.
- With the same media ID and subsequent init, the old media session is closed and a new media session is started.
- With different media IDs, a new media session is started. The will lead to multiple media sessions in parallel.