As a quality engineer I need to be able to better identify:

• When quality issues might be correlated to active audio / subtitle tracks.
• In which context the web player is displayed (surrounding product).

As a Pillarbox developer I need updated monitoring specifications that describe how these needs will be supported:

• audio and subtitles fields are added to the heartbeat, stop and error payloads. These string-based fields allow players to specify which track is active (including automatic selections, e.g. forced subtitles). The language code associated with a track (e.g. BCP-47) must be provided.
• An application object with id and version fields, both strings, is added to the start payload.

No monitoring format version update is required since these changes are not breaking.

Acceptance criteria

• The above specifications have been written.

Tasks

• Update specifications