LSA final preparations

[defagos]

As a Pillarbox team member I want to ensure a smooth transition to the new LSA streams.

Acceptance criteria

• The final updates to the stream configuration have been tested successfully (find the smallest test surface, e.g. a single stream should suffice if the configuration is identical).
• Remaining issues still affecting metadata have been reported (e.g. a video code is incorrectly specified for audio livestreams).
• Issues for potential improvements have been opened (e.g. removal of the stream offset in the future).

See https://srgssr-ch.atlassian.net/wiki/spaces/STXTBROAD/pages/947290463/LSA+Test?focusedCommentId=1367213085

Tasks

• Test streams intended for productions.
• Open metadata issue.
• Open stream offset removal issue.
• Open stream offset adjustment issue.
• Open issue to adjust timestamps in the stream for a better user experience (~ 10 seconds).

[defagos]

Codec information (in particular) is already wrong in production, so should not be a blocker.

[defagos]

As discussed with @amtins Letterbox web still requires the stream offset. This property must therefore be retained but we might need to ask for minor adjustments to corresponding values.