Minutes interim-2020-cellar-05: Tue 21:00
minutes-interim-2020-cellar-05-202005262100-00

CELLAR -- DRAFT AGENDA for Virtual Interim Meeting May 26, 2020
21:00 Amsterdam ***
19:00 UTC
15:00 NYC
12:00 San Francisco

Present:
Michael Richardson
Spencer Dawkins
Martin Below
Steve Lhomme
Joao Victor Giraldez (google summer of code Student!)
Reto Kromer
Michael Niedermayer
Jérôme Martinez
Dave Rice

INFO:
https://datatracker.ietf.org/meeting/interim-2020-cellar-04/session/cellar
https://datatracker.ietf.org/doc/agenda-interim-2020-cellar-04-cellar-01/ WEB
CONFERENCE: https://whereby.com/cellar-interim THERE IS NO TELEPHONE DIALIN
(You can try this at any time.) These notes at:
https://github.com/cellar-wg/chair-notes

1. Note Well. https://www.ietf.org/about/note-well/
2. Accept draft minutes from April 28 meeting (attached below)
3. Logistics for Meeting.
2a) Etherpad for notes
https://etherpad.ietf.org/p/notes-cellar-virtual?useMonospaceFont=true 2b)
APPEAR.IN is now called "whereby.com" https://whereby.com/cellar-interim 2c)
Roll call

4. WG status update
EBML -- still in RFC-editor queue, waiting to get to top
FFV1 -- version 13 was posted 2020-04-28 *** NEEDS REVISED VERSION after AD
Review *** -14: almost complete after AD review, but 4 more items to do left in
the draft.

5. Mapping of MOV clean aperture values to Matroska
https://mailarchive.ietf.org/arch/msg/cellar/dvEI8FGqMtJ5PKkqEjdPWj3GrcA/
it is a bit blurry about what is supposed to come from the container, and what
is supposed to come from the codec we need to have a solid explanation of what
they are supposed to do with it. Aperture value, but only a part of the frame
is expected to be visible to the viewer, so this is a hint as to what to
display.  This is used by the cinema, but they shoot a bigger frame. Also, if
there is video that is letter-box inside the frame, and do not show that part.
      Example file of huge padding that should not be displayed:
      http://v2v.cc/~j/theora_testsuiJte/offset_test.ogv Steve to open issue in
      Matroska spec about how this should be split up.

EBML <documentation>
   https://github.com/cellar-wg/ebml-specification/blame/master/specification.markdown#L582
This needs to be edited to match the XSD

Other Matroska issues
- https://github.com/cellar-wg/matroska-specification/pull/390 vs
https://github.com/cellar-wg/matroska-specification/pull/389 The WG needs to
pick one or the other. -
https://github.com/cellar-wg/matroska-specification/pull/342/files?short_path=905680a#diff-905680a88637ae5bcaa76c4f594f285b
do we need a new kind of "Hidden" flag is the Hidden flag recursive?

this is for the Edition (EditionFlagHidden and EditionFlagDefault)
https://github.com/hubblec4/Matroska-Playback/blob/master/src/EditionEntry.md

     -

AOB?
NEXT MEETING June 23, 2020.

Previous Meeting

CELLAR -- DRAFT AGENDA for Virtual Interim Meeting
April  28, 2020        21:00 Amsterdam  ***
                       19:00 UTC
                       15:00 NYC
                       12:00 San Francisco

Present:
Martin Below
Michael Niedermayer
Dave Rice
Steve Lhomme
Reto Kromer
Jerome Martinez
Michael Richardson
Spencer Dawkins

INFO:
   https://datatracker.ietf.org/meeting/interim-2020-cellar-04/session/cellar
   https://datatracker.ietf.org/doc/agenda-interim-2020-cellar-04-cellar-01/

WEB CONFERENCE:
   https://whereby.com/cellar-interim
   THERE IS NO TELEPHONE DIALIN (You can try this at any time.)
   These notes at: https://github.com/cellar-wg/chair-notes

1. Note Well.  https://www.ietf.org/about/note-well/
2. Accept draft minutes from March 31 meeting (attached below)
no comments. Minutes approved.

3. Logistics for Meeting.
   2a) Etherpad for notes
       https://etherpad.ietf.org/p/notes-cellar-virtual?useMonospaceFont=true

   2b) APPEAR.IN is now called "whereby.com"
       https://whereby.com/cellar-interim

   2c) Roll call

4. WG status update
   * EBML -- still in RFC-editor queue, waiting to get to top
   * FFV1 -- version 12 was posted 2020-01-28
   *** new revision posted 2020-04-28
   - issues still not handled.
- Jerome will write down the list
     - §3.4 (about Q)
     - §3.8.1.1.1 (non-normative example)
     - §3.8.1.2 (no referenced comments)
     - §3.8.2.3 (light documentation of the "state" structure)
     - §4 (MD-style anchor)
     - §4 (phrasing is confusing)
     - §4.1.16 (clarification of the word "header")
     - §4.2.3.4 (normative dependencies)
     - §4.6 (ambiguous)
     - §4.7 ("type" indicators)
     - §6 (have a look on RFC 4175, Section 8)

5. Extension drafts on Matroska / FFV1
- Dave Rice: ffv1 encoding float (vs integer) base formats... a new feature MN
and JM. - this might be in ffv1 (v0-3) or in v4, and whether or not the v3
format could support it. - ffv1 can losslessly store *integer* formatted pixel
formats, but can not store float based pixel formats - could be done as an
extension document to the v3.

   - Dolby Vision, issue #373
   https://github.com/cellar-wg/matroska-specification/issues/373 - will go
   into a different document

6. Work on Matroska issues.
  -  reduced number of open pull requests, created some new issues
  - all open pull requests were reviewed.

7. AOB.
Matroska meeting in Amsterdam. _No Time To Wait._
Still stalling on opening registration and call for proposals.
Many large gatherings are cancelled due to COVID, so it might delayed or
cancelled. Registration decision will take a few weeks.

NEXT MEETING May 26, 2020.