CELLAR -- DRAFT AGENDA for Virtual Interim Meeting

| Date | Time | Local Times |
| :-: :-: :-
| 2025-01-28 21:00 Amsterdam | Time Converter | |
| Note | Meeting time is anchored to Amsterdam | |

Administrivia

INFO:

https://notes.ietf.org/notes-ietf-interim-2025-cellar-01-cellar
https://github.com/ietf-wg-cellar/chair-notes/tree/master/interim-2025-01
**Note that we're now pointing to the Github repo for chair notes here**

MEETING INFO and WEB CONFERENCE:

https://datatracker.ietf.org/meeting/interim-2025-cellar-01/session/cellar
https://meetings.conf.meetecho.com/interim/?group=b4823b7e-da01-4862-838d-09eab76ad4b3

note that chat is now Zulip:
https://zulip.ietf.org/login/#narrow/stream/cellar
but is accessible via meetecho interface.

Shared HedgeDoc for notetaking

Now using the Datatracker assigned notepad at:
https://notes.ietf.org/notes-ietf-interim-2025-cellar-01-cellar

• Note that if you log in to the IETF datatracker, you'll be able to
  edit/clarify/correct these notes, add your name to attendee lists,
  etc.

• Please ask Michael or Spencer or Robert if you have questions.

2025 virtual interim meeting dates

• Proposed 2025 dates listed at
  https://datatracker.ietf.org/wg/cellar/meetings/

** 2025-01-28
** 2025-02-25
** 2025-04-08
** 2025-04-29
** 2025-05-27
** 2025-06-24
** 2025-08-26
** 2025-09-23
** 2025-10-28
** 2025-12-09

Agenda Items

Note Well:

https://www.ietf.org/about/note-well/
Please be KIND to each other.

Roll call

Attendees

• Spencer Dawkins
• Robert Sparks
• Michael Richardson
• Steve Lhomme
• Jérôme Martinez
• Dave Rice

Regrets:

Accept draft minutes from previous meeting

MINUTES ARE AT:  https://notes.ietf.org/notes-ietf-interim-2024-cellar-10-cellar

• The minutes looked fine - accepted

WG status update

| Draft | State | Date Posted | Plans |
| :- :- :- :-
| draft-ietf-cellar-codec-14 | ID-exists | 2024-12-15 | |
| draft-ietf-cellar-tags-15 | ID-Exists | 2024-11-24 | |
| draft-ietf-cellar-chapter-codecs-05 | ID-Exists | 2024-08-27 | |
| draft-ietf-cellar-control-05 | ID-Exists | 2024-08-27 | |
| draft-ietf-cellar-ffv1-v4-22 | expired | 2024-01-17 | |
| FLAC: RFC9639 (pause for celebration!) | | | |
| MATROSKA: RFC9559 | | | |

WG chair update

Robert Sparks has joined the WG as an incoming co-chair.

errata pending for RFC9559:

• (not actually in the errata system)

• application/x-font-otf (#921) which should probably be added to
  Matroska v5 instead, but it’s just describing legacy Media Types
  that should not be used

  • an extra media type.
  • All we need to do is fill out a media type registration and go
    through that process
  • we already have reference to font/otf.

Action Spencer to fill out the registration form and begin the
process

Other errata on RFC9559

We still need to do some analysis on what's actually needed in PR 946
(https://github.com/ietf-wg-cellar/matroska-specification/pull/946)
PR 932 isn't controversial, we can just merge this now

Milestone review:

What document to work on next?
What are low-hanging fruit that can advance quickly?

tags-15 seems ready to go.

need to add tag for latest EBU recommendations, but we don't have all
the information we need to describe the tag yet
https://tech.ebu.ch/publications/r128/

Jerome will check with the right person (bb010g on GitHub regarding
https://github.com/ietf-wg-cellar/matroska-specification/pull/865)

Action Spencer can start heading toward Working Group Last Call for
tags-15

CODEC-14

*** codec-14 has some pull requests

PR 937 - SMPTE12 time code bit order needs to be clarified
PR 745 - needs a rebase and edit
PR 446 needs to be rebased

These aren't controversial, just need some attention

chapter-codecs-05

Have not done much work on this recently (focus has been on first two
Mastroska extension documents)

We do have a reference to a specification that is not public (DVD1 will
always be private)

Action Spencer to chase this reference so we can do the right thing
(we might have a solution as of the end of January 2025!)
https://en.wikipedia.org/wiki/DVD_Forum
https://web.archive.org/web/20241128004023/http://www.dvdforum.org:80/about-mission.htm

https://www.dvdfllc.co.jp/notice.html "DVD Format Books (DVD
Specifications) will be deposited to the National Diet Library (NDL),
Japan (https://www.ndl.go.jp/en/index.html) as technology assets, early
2025."

control-05

This was taken out of the main Matroska specification because we thought
it was underspecified.

We may want to drop this document in the future. The document is not a
priority right now - no one is using it.

AOB?

• We now have FFV1 encoder implementation in ffmpeg. The GPU decoder
  is in flight. There is discussion on the ffmpeg-devel mailing list
  for FFV1 version 4 improvements.

Next meeting is 2025-02-25.