Session Date/Time: 23 Nov 2021 20:00

CELLAR

Summary

The CELLAR Working Group met to discuss the status of various drafts, including Matroska, FFV1, and FLAC, as well as addressing a long-standing copyright issue related to a historical document. The meeting also served as a test for the MeetEcho meeting platform for potential future use. Key discussions revolved around the progress of the Matroska draft towards Working Group Last Call, the need for a "keep-alive" update for the FFV1 draft, and a strategy for integrating new and existing content for a document previously held up by copyright concerns.

Key Discussion Points

Meeting Platform Test: The meeting began with a test of the MeetEcho and Whereby platforms, including an "infinite recursion" demonstration of screen sharing. Attendees were encouraged to join both platforms to test functionality like audio, video, and raising hands.
FFV1 Version 4 Draft Expiration: The draft-ietf-cellar-ffv1-v4 draft is expiring soon. It was confirmed there are no technical updates, but a "keep-alive" repost is needed to maintain its visibility in the data tracker.
Matroska, Tags, and Codecs Drafts Status:
- Progress on the Matroska draft (draft-ietf-cellar-matroska) continues, with efforts to resolve remaining issues and pull requests.
- The Matroska document can exist independently of the companion Tags and Codecs drafts, as it defines core elements while the others define specific values.
- A target for Working Group Last Call (WG-LC) for Matroska by the end of January 2022, aiming for submission to the IESG by April 2022, was discussed, following a cadence of publishing one RFC per spring.
- Challenges in reviewing the Matroska document were noted, particularly the detailed schema in chapter 8, which can be difficult for non-implementers to provide detailed feedback on. The focus for general review should be on understanding and implementability.
- IANA Considerations: The IANA considerations section, especially regarding historical deprecated element IDs and other allocations, requires careful review by the chairs and potential ART Area review.
- Security Considerations: The Matroska draft lacks a dedicated Security Considerations section. Discussion included whether it could inherit from EBML or if specific Matroska-related security advice (e.g., regarding codec data interpretation) is needed.
Copyright Issues (Historical Document):
- Significant progress has been made on a document previously stalled by copyright concerns. A new version was drafted from scratch to avoid copyright issues.
- The current strategy is to combine the best parts of the original and the newly written text.
- An explicit license for the new contributions was shared and accepted.
- Regarding Josh Coulson, the original author, it was noted that while he is supportive, his preferred role (author vs. contributor) needs clarification, considering the responsiveness required during RFC Editor processing (AUTH48). Listing him as a major contributor but not an author might be pragmatic if responsiveness is a concern.
- The historical version of the document should be referenced informatively in the acknowledgments.
FLAC Draft: Briefly mentioned, with no specific updates beyond existing issues needing review.
Next CELLAR Meetings: The 2022 meeting dates have been approved and added to the data tracker, including a special meeting in early December to compensate for the November IETF and typical December break.
"No Time to Wait 5" Event: The event is still planned for early December, with remote participation available. Organizers are monitoring local lockdown conditions and will communicate updates regarding physical attendance.

Decisions and Action Items

Decisions:

The minutes from the previous meeting were accepted.
The explicit license proposed for the new contributions to the copyright-affected document was accepted.
A pull request incorporating the license for the copyright-affected document was merged.

Action Items:

Jerome (or another designated editor): Repost the draft-ietf-cellar-ffv1-v4 document as a "keep-alive" (expected to be dash-18). (Due: Before expiration)
Jerome: Continue working on Matroska draft issues and pull requests, specifically addressing Moritz's feedback, and merging minor items (e.g., PRs #115, #555). (Due: Ongoing)
Spencer and Michael (Chairs): Review the IANA Considerations section of the Matroska draft, particularly concerning deprecated elements and undocumented allocations. (Due: Before WG-LC)
Chairs: Request an ART Area review for the Matroska draft, specifically focusing on IANA considerations, sometime in the winter. (Due: Winter)
Jerome: Open GitHub issues for the Matroska draft, including one for the Security Considerations section. (Due: ASAP)
Martin: Review Jerome's pull request for the copyright-affected document and provide comments on which parts to retain or integrate from the original. (Due: ASAP)
Martin: Create specific, smaller pull requests to incorporate selected paragraphs or sections from the newly drafted content into the copyright-affected document. (Due: Ongoing)
Martin: Add himself as an author to the copyright-affected document and remove the placeholder author. (Due: ASAP)
Chairs (or designated editor): Engage Josh Coulson to determine if he wishes to be listed as an author or a contributor for the copyright-affected document. (Due: Before WG-LC)
Dave Rice: Recover IETF data tracker credentials and test access to the MeetEcho platform. (Due: ASAP)
Michael (Chairs): Follow up with Dave Rice regarding his access issues for MeetEcho. (Due: After meeting)

Next Steps

The Working Group will focus on advancing the Matroska draft towards Working Group Last Call by the end of January 2022, requiring significant review, especially for IANA and security considerations. Work on the copyright-affected document will continue by blending new and old content under a clear license. The FFV1 draft will receive a "keep-alive" update. The next CELLAR meeting is planned for January, with an interim meeting in early December.