CELLAR -- DRAFT AGENDA for Virtual Interim Meeting

Administrivia

INFO:

https://github.com/ietf-wg-cellar/chair-notes/tree/master/interim-2023-02
Note that we're now pointing to the Github repo for chair notes here

MEETING INFO and WEB CONFERENCE:

info: https://datatracker.ietf.org/meeting/interim-2023-cellar-02/session/cellar
https://meetings.conf.meetecho.com/interim/?short=8a8f2003-11c7-4564-88fe-46b1c0c93049

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-2023-cellar-02-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 if you have questions.

2023 virtual interim meeting dates

• Please note our 2023 dates listed at https://datatracker.ietf.org/wg/cellar/meetings/

Agenda Items

Note Well:

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

Roll call

Attendees
* Spencer Dawkins
*

Regrets
*

Accept draft minutes from 2023-01-24

*

WG status update

Milestone review:

• IESG Balloting is next step for Matroska
• AD Evaluation is next step for FLAC

Matroska issues - Discussion of Last Call comments on the call.

• Need to discuss EBML Lacing details are incorrect #726 issue on the call
  *

FLAC issues - Discussion on the call

• Spencer finally finished the Shepherd Review in two parts, starting here
  *

FFV1 v4 issues - Discussion on the call

• From Spencer) Any Feedback from FOSDEM FFV1 presentation?
• small wish list is in issue tracker: https://github.com/FFmpeg/FFV1/issues
• we will go through the issues and prioritize them.
  *

AOB?

• (from Spencer) Is it useful to discuss how much we want to rely on the RFC Errata process for specifications with source text in GitHub at a future meeting?
• (from Spencer) Is it useful to go over the post-WGLC publication process at a future meeting?
• Next meeting is 2023-03-28

Previous Minutes - CELLAR -- DRAFT AGENDA for Virtual Interim Meeting

CELLAR -- DRAFT AGENDA for Virtual Interim Meeting

Administrivia

INFO:

https://github.com/ietf-wg-cellar/chair-notes/tree/master/interim-2023-01
Note that we're now pointing to the Github repo for chair notes here

MEETING INFO and WEB CONFERENCE:

info: https://datatracker.ietf.org/meeting/interim-2023-cellar-01/session/cellar
https://meetings.conf.meetecho.com/interim/?short=d340a5fa-8e80-4092-b480-53c684f0b32d

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-2023-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 if you have questions.

2023 virtual interim meeting dates

• Please note our 2023 dates listed at https://datatracker.ietf.org/wg/cellar/meetings/

Agenda Items

Note Well:

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

Roll call

Attendees
* Spencer Dawkins
* Martijn van Beurden
* Michael Richardsdon
* Steve Lhomme
* Jerome Martinez
* Michael Niedermayer
* Dave Rice

Regrets
*

Accept draft minutes from December 6, 2022

• minutes accepted as presented.

WG status update

FFV1 presentation at FOSDEM in open media dev-room on Saturday, 2023-02-04, 14:00.
https://fosdem.org/2023/schedule/event/om_ffv1/

Milestone review:

• FLAC waiting for Shepherd write up from Spencer

Matroska issues - Discussion of AD review comments from Murray Kucherawy on the call.

• document has been returned with AD comments
• Steve Lhomme has been very responsive in providing PRs and explanations to Murray (Thank you, Steve!)
• One PR is still open - we'll discuss on the call
• Our UIDs are not UUIDs - they're not what the IETF calls UUIDs.
• The UUID specification is being revised, but we can recommend calling them UUID v4 and treat them as an opaque 128-bit string.
• We have no idea what UUID v8 will be, of course ...
• Do we forbid reuse of deprecated IDs? That's maximum compatibility, but reduces the size of the available ID space.
• We don't know of usages (many? most?), but we can't know that no one has used a deprecated code point.
• We can mark the deprecated IDs as "returned" not as "reserved", and we can instruct IANA to use "returned" IDs last.
• This is for one-byte IDs - we can just lose the longer ID codes. We did this with DHCP option codes, so we have prior art here, including collisions because people were reusing "unused" option codes without coordinating with others, and how to recover from that situation.
• Spencer noted that this is a working group document, so we should make sure the working group still agrees with the document after changes.

FLAC issues - Discussion on the call

• OPUS talks a lot about encoding, and the FLAC specification doesn't. Is that OK?
• We tend to focus on decoders, and allow encoders to innovate. We can say what we want to say, but we should make a decision explicitly.
• Martijn is still experimenting and making small corrections and clarifications, and that's fine.
• We think June is a reasonable timeframe now.

FFV1 v4 issues - Discussion on the call

• No discussion on the call.
• small wish list is in issue tracker: https://github.com/FFmpeg/FFV1/issues
• next meeting, we will go through the issues and prioritize them.

AOB?

• Next meeting is 2023-02-28
• Implementation report: ffmpeg has ffv1 in MXF patch!