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Subject: [Cellar] Weekly github digest (CELLAR Activity Summary)
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Events without label "editorial"

Issues
------
* ietf-wg-cellar/flac-specification (+2/-1/=F0=9F=92=AC0)
  2 issues created:
  - Limit subframe bit-per-sample to 32 (by ktmf01)
    https://github.com/ietf-wg-cellar/flac-specification/issues/146=20
  - Limit residual to 32 bit signed int (by ktmf01)
    https://github.com/ietf-wg-cellar/flac-specification/issues/145=20

  1 issues closed:
  - Including a list of open-source implementations? https://github.com/iet=
f-wg-cellar/flac-specification/issues/116=20



Pull requests
-------------
* ietf-wg-cellar/flac-specification (+0/-3/=F0=9F=92=AC0)
  3 pull requests merged:
  - Formalize links to papers into proper citations
    https://github.com/ietf-wg-cellar/flac-specification/pull/142=20
  - Add implementation status section, as per RFC 7942
    https://github.com/ietf-wg-cellar/flac-specification/pull/143=20
  - Change status to standard
    https://github.com/ietf-wg-cellar/flac-specification/pull/135=20


Repositories tracked by this digest:
-----------------------------------
* https://github.com/FFmpeg/FFV1
* https://github.com/ietf-wg-cellar/ebml-specification
* https://github.com/ietf-wg-cellar/matroska-specification
* https://github.com/ietf-wg-cellar/matroska-test-files
* https://github.com/ietf-wg-cellar/flac-specification
* https://github.com/ietf-wg-cellar/flac-test-files
* https://github.com/ietf-wg-cellar/chair-notes

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<body>
<h1>Sunday April 03, 2022</h1>

<p>Events without label "editorial"</p>

<h2>Issues</h2>

<h3>ietf-wg-cellar/flac-specification (+2/-1/=F0=9F=92=AC0)</h3>
  <p class=3D"new">2 issues created:</p>
  <ul>
  <li>#146 <a href=3D"https://github.com/ietf-wg-cellar/flac-specification/=
issues/146">Limit subframe bit-per-sample to 32</a> (by ktmf01) </li>
 =20
  <li>#145 <a href=3D"https://github.com/ietf-wg-cellar/flac-specification/=
issues/145">Limit residual to 32 bit signed int</a> (by ktmf01) </li>
  </ul>


  <p>1 issues closed:</p>
  <ul>
  <li>#116 <a href=3D"https://github.com/ietf-wg-cellar/flac-specification/=
issues/116">Including a list of open-source implementations?</a> </li>
  </ul>



<h2>Pull requests</h2>
<h3>ietf-wg-cellar/flac-specification (+0/-3/=F0=9F=92=AC0)</h3>


  <p>3 pull requests merged:</p>
  <ul>
  <li>#142 <a href=3D"https://github.com/ietf-wg-cellar/flac-specification/=
pull/142">Formalize links to papers into proper citations</a> </li>
 =20
  <li>#143 <a href=3D"https://github.com/ietf-wg-cellar/flac-specification/=
pull/143">Add implementation status section, as per RFC 7942</a> </li>
 =20
  <li>#135 <a href=3D"https://github.com/ietf-wg-cellar/flac-specification/=
pull/135">Change status to standard</a> </li>
  </ul>


  <details>
    <summary>Repositories tracked by this digest:</summary>
<ul class=3D"repos">
  <li><a href=3D"https://github.com/FFmpeg/FFV1">https://github.com/FFmpeg/=
FFV1</a></li>
  <li><a href=3D"https://github.com/ietf-wg-cellar/ebml-specification">http=
s://github.com/ietf-wg-cellar/ebml-specification</a></li>
  <li><a href=3D"https://github.com/ietf-wg-cellar/matroska-specification">=
https://github.com/ietf-wg-cellar/matroska-specification</a></li>
  <li><a href=3D"https://github.com/ietf-wg-cellar/matroska-test-files">htt=
ps://github.com/ietf-wg-cellar/matroska-test-files</a></li>
  <li><a href=3D"https://github.com/ietf-wg-cellar/flac-specification">http=
s://github.com/ietf-wg-cellar/flac-specification</a></li>
  <li><a href=3D"https://github.com/ietf-wg-cellar/flac-test-files">https:/=
/github.com/ietf-wg-cellar/flac-test-files</a></li>
  <li><a href=3D"https://github.com/ietf-wg-cellar/chair-notes">https://git=
hub.com/ietf-wg-cellar/chair-notes</a></li>
</ul>
</details>
</body>
</html>

--===============2456851366215918220==--


From nobody Thu Apr  7 11:27:59 2022
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From: Martijn van Beurden <mvanb1@gmail.com>
Date: Thu, 7 Apr 2022 20:27:41 +0200
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To: Codec Encoding for LossLess Archiving and Realtime transmission <cellar@ietf.org>
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Subject: [Cellar] WGLC draft-ietf-cellar-matroska --- status of this document
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Hi all,

Under 2, Status of this document, it says
> Note that versions 1, 2, and 3 have been finalized. Version 4 is currently work in progress. There MAY be further additions to v4.

This brings up the question, which version of Matroska is defined by
the document? I guess all of them, but perhaps this should be stated
clearly? Also, it seems strange to base a standards track RFC on a
work in progress?

Kind regards,

Martijn van Beurden


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Subject: [Cellar] WGLC draft-ietf-cellar-matroska --- misplaced headers
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It seems something is wrong with headers 23.3 and 23.4?

> 23. Attachments . . . . . . . . . . . . . . . . . . . . . . . . . 162
> 23.1.  Cover Art  . . . . . . . . . . . . . . . . . . . . . . . 163
> 23.2.  Font files . . . . . . . . . . . . . . . . . . . . . . . 164
> 23.3.  They MAY use the MIME types found in older files when
>           compatibility with older players is necessary. . . . . . 165
> 23.4.  title: Cues  . . . . . . . . . . . . . . . . . . . . . . 165


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Subject: [Cellar] WGLC draft-ietf-cellar-matroska --- pace of first few chapters
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I don't know whether this is important in specification documents, but
I find the first few chapters having a strange pace, for lack of a
better term. Introduction -> Status of this document -> Security
considerations -> Notations and conventions -> Basis in EBML ->
Language codes -> Matroska structure. This seems unnecessary switching
topics.

I propose moving security considerations to the back of the document
(just before IANA considerations) and Language codes to before Unknown
elements. Also, Basis in EBML seems a bit of a strange title to me.
Perhaps merging Basis in EBML and Matroska structure to one chapter
with the title Matroska structure would be better? One could say the
Matroska format is 'structured' using EBML. The content now under
Matroska structure would then be a section with the name 'Matroska
overview', or a more specific name like 'Element overview'?

This way the document starts with the basis, the root of Matroska,
instead of details like language codes.


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--=-=-=
Content-Type: text/plain; charset=utf-8
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Martijn van Beurden <mvanb1@gmail.com> wrote:
    > It seems something is wrong with headers 23.3 and 23.4?

Yeah, it's weird.
My guess is an error in some XML, some tag not closed.

    >> 23. Attachments . . . . . . . . . . . . . . . . . . . . . . . . . 162
    >> 23.1.  Cover Art  . . . . . . . . . . . . . . . . . . . . . . . 163
    >> 23.2.  Font files . . . . . . . . . . . . . . . . . . . . . . . 164
    >> 23.3.  They MAY use the MIME types found in older files when
    >> compatibility with older players is necessary. . . . . . 165
    >> 23.4.  title: Cues  . . . . . . . . . . . . . . . . . . . . . . 165

    > _______________________________________________
    > Cellar mailing list
    > Cellar@ietf.org
    > https://www.ietf.org/mailman/listinfo/cellar

=2D-
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 I=C3=B8T consulti=
ng )
           Sandelman Software Works Inc, Ottawa and Worldwide





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Subject: Re: [Cellar] WGLC draft-ietf-cellar-matroska --- status of this document
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Martijn van Beurden <mvanb1@gmail.com> wrote:
    > Under 2, Status of this document, it says
    >> Note that versions 1, 2, and 3 have been finalized. Version 4 is
    >> currently work in progress. There MAY be further additions to v4.

I think version 3, same as flac.

    > This brings up the question, which version of Matroska is defined by
    > the document? I guess all of them, but perhaps this should be stated
    > clearly? Also, it seems strange to base a standards track RFC on a work
    > in progress?

There will be normative references from Matroska to ffv1-v3, RFC9043.

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-




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Subject: Re: [Cellar] WGLC draft-ietf-cellar-matroska --- status of this document
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On 09/04/2022 01:50, Michael Richardson wrote:
> Martijn van Beurden <mvanb1@gmail.com> wrote:
>      > Under 2, Status of this document, it says
>      >> Note that versions 1, 2, and 3 have been finalized. Version 4 is
>      >> currently work in progress. There MAY be further additions to v4.
>
> I think version 3, same as flac.

Issue there is that Matroska v4 brings new stuff good to have in the 
standard.
There is no version upgrade until there is a breaking change, that means 
that v4 is stable there, and that there MAY be additions, and theses 
additions will not break the v4 standard, like a minor version.
Note that this is same for FFV1, FFV1 version 3 has a micro_version 
number (currently 4, numbers 0-3 are reserved for past use) and in the 
future there may be a micro_version 5 which would add new info 
compatible with decoders not aware of the new features.
Actually also like HTTP, version 1 got lot of updates and browsers are 
expected to skip the new HTTP headers, that does not mean that HTTP 1 
should not have been standardized a long time ago.

IMO Matroska standard should include version 4, knowing that version 4 
may receive updates in the future.
Suggestion of wording:

***
Note that versions 1, 2 and 3 are no more maintained, no new elements 
are expected in files with theses version numbers.
Version 4 is the current version, and new elements are expected to be 
defined in the future.
For all versions, a software reading files with unknown elements SHOULD 
ignore them.
***

This would permit a version "4.1" (or "version 4 extension X, or 
whatever else for the naming :) ) compatible with version 4 in the future.

Jérôme


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Subject: Re: [Cellar] WGLC draft-ietf-cellar-matroska --- status of this document
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Subject: [Cellar] WGLC draft-ietf-cellar-matroska --- blocks in general and block structure
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Hi all,

Chapter 12 starts quite abruptly with 'Bit 0 is the most significant
bit', without explanation to what is meant. I assume that this covers
the bit positions in the table in for example section 12.2. Perhaps
this could be a little more verbose.

I also propose that a little bit of text is added to describe the
context, perhaps a short recap of what the function is of blocks and
where they fit in. I found it difficult to understand what a
BlockGroup actually groups (as it contains only a single block, not a
group of them?), and why a SimpleBlock is more complicated than a
Block. It took a few readings before I understood that a BlockGroup
holds a single Block with other elements providing context, and that
the SimpleBlock instead replaces this flexible context with a rigid,
simple one.

Similarly I also find this bit of text in chapter 7 confusing:

The Cluster Element helps to break up SimpleBlock or BlockGroup
Elements and helps with seeking and error protection.

It seems a little counterintuitive that an element of a higher level
helps to break up an element of a lower level? Perhaps this can be
rephrased to the following, when combined/swapped with the sentence
that follows it

It is RECOMMENDED that the size of each individual Cluster Element be
limited to store no more than 5 seconds or 5 megabytes. Using several
smaller Cluster Elements instead of a single large one helps with
seeking and makes error protection more robust.


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Subject: [Cellar] Weekly github digest (CELLAR Activity Summary)
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Events without label "editorial"

Issues
------
* ietf-wg-cellar/matroska-specification (+4/-0/=F0=9F=92=AC2)
  4 issues created:
  - Possible typo track ticks (by ktmf01)
    https://github.com/ietf-wg-cellar/matroska-specification/issues/594=20
  - TargetTypeValue table mentions CONCERT twice (by ktmf01)
    https://github.com/ietf-wg-cellar/matroska-specification/issues/592=20
  - Reorder some sections at the start the Matroska spec (by robUx4)
    https://github.com/ietf-wg-cellar/matroska-specification/issues/590 [cl=
arifications] [spec_main]=20
  - Remind of the extensibility properties of EBML used in Matroska (by rob=
Ux4)
    https://github.com/ietf-wg-cellar/matroska-specification/issues/589 [cl=
arifications] [spec_main]=20

  2 issues received 2 new comments:
  - #592 TargetTypeValue table mentions CONCERT twice (1 by retokromer)
    https://github.com/ietf-wg-cellar/matroska-specification/issues/592=20
  - #589 Remind of the extensibility properties of EBML used in Matroska (1=
 by robUx4)
    https://github.com/ietf-wg-cellar/matroska-specification/issues/589 [cl=
arifications] [spec_main]=20



Pull requests
-------------
* ietf-wg-cellar/matroska-specification (+5/-0/=F0=9F=92=AC0)
  5 pull requests submitted:
  - remove duplicate item from list (by retokromer)
    https://github.com/ietf-wg-cellar/matroska-specification/pull/593=20
  - Matroska draft-09 reordering (by robUx4)
    https://github.com/ietf-wg-cellar/matroska-specification/pull/591 [form=
atting] [spec_main]=20
  - update the Matroska versions covered by this document (by robUx4)
    https://github.com/ietf-wg-cellar/matroska-specification/pull/588 [clar=
ifications] [spec_main]=20
  - Ensure all markdown files end with 2 empty lines (by robUx4)
    https://github.com/ietf-wg-cellar/matroska-specification/pull/587 [bug]=
 [build system]=20
  - Update draft versions after the previous ones have been tagged (by robU=
x4)
    https://github.com/ietf-wg-cellar/matroska-specification/pull/586 [spec=
_main] [spec_tags] [spec_codecs] [build system]=20

* ietf-wg-cellar/flac-specification (+0/-0/=F0=9F=92=AC1)
  1 pull requests received 1 new comments:
  - #138 Add potential security issues in decoding (1 by retokromer)
    https://github.com/ietf-wg-cellar/flac-specification/pull/138=20


Repositories tracked by this digest:
-----------------------------------
* https://github.com/FFmpeg/FFV1
* https://github.com/ietf-wg-cellar/ebml-specification
* https://github.com/ietf-wg-cellar/matroska-specification
* https://github.com/ietf-wg-cellar/matroska-test-files
* https://github.com/ietf-wg-cellar/flac-specification
* https://github.com/ietf-wg-cellar/flac-test-files
* https://github.com/ietf-wg-cellar/chair-notes

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<title>Weekly github digest (CELLAR Activity Summary)</title>
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</style>
</head>

<body>
<h1>Sunday April 17, 2022</h1>

<p>Events without label "editorial"</p>

<h2>Issues</h2>

<h3>ietf-wg-cellar/matroska-specification (+4/-0/=F0=9F=92=AC2)</h3>
  <p class=3D"new">4 issues created:</p>
  <ul>
  <li>#594 <a href=3D"https://github.com/ietf-wg-cellar/matroska-specificat=
ion/issues/594">Possible typo track ticks</a> (by ktmf01) </li>
 =20
  <li>#592 <a href=3D"https://github.com/ietf-wg-cellar/matroska-specificat=
ion/issues/592">TargetTypeValue table mentions CONCERT twice</a> (by ktmf01=
) </li>
 =20
  <li>#590 <a href=3D"https://github.com/ietf-wg-cellar/matroska-specificat=
ion/issues/590">Reorder some sections at the start the Matroska spec</a> (b=
y robUx4) <span class=3D"label" style=3D"background-color: #FEF952; color: =
#000000">clarifications</span> <span class=3D"label" style=3D"background-co=
lor: #90BBFF; color: #000000">spec_main</span> </li>
 =20
  <li>#589 <a href=3D"https://github.com/ietf-wg-cellar/matroska-specificat=
ion/issues/589">Remind of the extensibility properties of EBML used in Matr=
oska</a> (by robUx4) <span class=3D"label" style=3D"background-color: #FEF9=
52; color: #000000">clarifications</span> <span class=3D"label" style=3D"ba=
ckground-color: #90BBFF; color: #000000">spec_main</span> </li>
  </ul>

  <p>2 issues received 2 new comments:</p>
  <ul>
  <li>#592 <a href=3D"https://github.com/ietf-wg-cellar/matroska-specificat=
ion/issues/592">TargetTypeValue table mentions CONCERT twice</a> (1 by reto=
kromer) </li>
 =20
  <li>#589 <a href=3D"https://github.com/ietf-wg-cellar/matroska-specificat=
ion/issues/589">Remind of the extensibility properties of EBML used in Matr=
oska</a> (1 by robUx4) <span class=3D"label" style=3D"background-color: #FE=
F952; color: #000000">clarifications</span> <span class=3D"label" style=3D"=
background-color: #90BBFF; color: #000000">spec_main</span> </li>
  </ul>




<h2>Pull requests</h2>
<h3>ietf-wg-cellar/matroska-specification (+5/-0/=F0=9F=92=AC0)</h3>
  <p class=3D"new">5 pull requests submitted:</p>
  <ul>
  <li>#593 <a href=3D"https://github.com/ietf-wg-cellar/matroska-specificat=
ion/pull/593">remove duplicate item from list</a> (by retokromer) </li>
 =20
  <li>#591 <a href=3D"https://github.com/ietf-wg-cellar/matroska-specificat=
ion/pull/591">Matroska draft-09 reordering</a> (by robUx4) <span class=3D"l=
abel" style=3D"background-color: #f9d0c4; color: #">formatting</span> <span=
 class=3D"label" style=3D"background-color: #90BBFF; color: #">spec_main</s=
pan> </li>
 =20
  <li>#588 <a href=3D"https://github.com/ietf-wg-cellar/matroska-specificat=
ion/pull/588">update the Matroska versions covered by this document</a> (by=
 robUx4) <span class=3D"label" style=3D"background-color: #FEF952; color: #=
">clarifications</span> <span class=3D"label" style=3D"background-color: #9=
0BBFF; color: #">spec_main</span> </li>
 =20
  <li>#587 <a href=3D"https://github.com/ietf-wg-cellar/matroska-specificat=
ion/pull/587">Ensure all markdown files end with 2 empty lines</a> (by robU=
x4) <span class=3D"label" style=3D"background-color: #FF6060; color: #">bug=
</span> <span class=3D"label" style=3D"background-color: #114ab2; color: #"=
>build system</span> </li>
 =20
  <li>#586 <a href=3D"https://github.com/ietf-wg-cellar/matroska-specificat=
ion/pull/586">Update draft versions after the previous ones have been tagge=
d</a> (by robUx4) <span class=3D"label" style=3D"background-color: #90BBFF;=
 color: #">spec_main</span> <span class=3D"label" style=3D"background-color=
: #bfecff; color: #">spec_tags</span> <span class=3D"label" style=3D"backgr=
ound-color: #fcf5ab; color: #">spec_codecs</span> <span class=3D"label" sty=
le=3D"background-color: #114ab2; color: #">build system</span> </li>
  </ul>



<h3>ietf-wg-cellar/flac-specification (+0/-0/=F0=9F=92=AC1)</h3>

  <p>1 pull requests received 1 new comments:</p>
  <ul>
  <li>#138 <a href=3D"https://github.com/ietf-wg-cellar/flac-specification/=
pull/138">Add potential security issues in decoding</a> (1 by retokromer) <=
/li>
  </ul>



  <details>
    <summary>Repositories tracked by this digest:</summary>
<ul class=3D"repos">
  <li><a href=3D"https://github.com/FFmpeg/FFV1">https://github.com/FFmpeg/=
FFV1</a></li>
  <li><a href=3D"https://github.com/ietf-wg-cellar/ebml-specification">http=
s://github.com/ietf-wg-cellar/ebml-specification</a></li>
  <li><a href=3D"https://github.com/ietf-wg-cellar/matroska-specification">=
https://github.com/ietf-wg-cellar/matroska-specification</a></li>
  <li><a href=3D"https://github.com/ietf-wg-cellar/matroska-test-files">htt=
ps://github.com/ietf-wg-cellar/matroska-test-files</a></li>
  <li><a href=3D"https://github.com/ietf-wg-cellar/flac-specification">http=
s://github.com/ietf-wg-cellar/flac-specification</a></li>
  <li><a href=3D"https://github.com/ietf-wg-cellar/flac-test-files">https:/=
/github.com/ietf-wg-cellar/flac-test-files</a></li>
  <li><a href=3D"https://github.com/ietf-wg-cellar/chair-notes">https://git=
hub.com/ietf-wg-cellar/chair-notes</a></li>
</ul>
</details>
</body>
</html>

--===============3281214697067467630==--

