IETF Logo Mail Archive

[Cellar] Can there really be "many Blocks in a BlockGroup"?

Michael Bradshaw <mjbshaw@google.com> Wed, 05 February 2020 20:00 UTC

Return-Path: <mjbshaw@google.com>
X-Original-To: cellar@ietfa.amsl.com
Delivered-To: cellar@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 218A7120850 for <cellar@ietfa.amsl.com>; Wed, 5 Feb 2020 12:00:18 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -17.5
X-Spam-Level:
X-Spam-Status: No, score=-17.5 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, ENV_AND_HDR_SPF_MATCH=-0.5, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5, USER_IN_DEF_SPF_WL=-7.5] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=google.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZWOI586GSgyb for <cellar@ietfa.amsl.com>; Wed, 5 Feb 2020 12:00:16 -0800 (PST)
Received: from mail-wm1-x32d.google.com (mail-wm1-x32d.google.com [IPv6:2a00:1450:4864:20::32d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id EE6491208F0 for <cellar@ietf.org>; Wed, 5 Feb 2020 12:00:15 -0800 (PST)
Received: by mail-wm1-x32d.google.com with SMTP id s10so3822458wmh.3 for <cellar@ietf.org>; Wed, 05 Feb 2020 12:00:15 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=Dq4AI5I60lzeu/3r2Xb1ZcSAH1/AAKKT2PVfxpDu1AY=; b=IpEO/B/yO2MogBG6t5x1xGMk/T/YCbTcY3K82HPEyLdQxZauToUhgp12dbtSlZ7YMx 87K6+ONjDVWTq2799KjJ0+nRuCdWsS/Z3KrHnE2PljtcrjHYeL+18PFaxa0APMLmabI6 GypKP2BD7NRy3WOWoe6a/gtQ6891hjP9/YXvAs5cPNg/HmD2IWvIqeqLfEuJ4dRBNRN/ GiDxRxWq3k39ptFjHar5Fk64Id+uLirGxOBCSRDJLOshkQ6H9lGf7RmzRYb79LuneqrX WewOIT9XQMQZ/4eDE+7+n+6kAB0MZx8QJKl0ABDb3qTwLr/aaGllwzkT9bwN7F+G4kMf SMCQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=Dq4AI5I60lzeu/3r2Xb1ZcSAH1/AAKKT2PVfxpDu1AY=; b=uE8YhjnLNWzSOuYgYeKHSF/t2SjmDqWDeGyGfovtprubwoR/12ZKoj+QA4X8dtZh/u fDW5yOSv95u/nq8gd/8XduNToDL5XyJBK8H2lVvlWTIB7DeEvLh4YM0Z1kIeNxQ7arZe VETDbjcvEHA8ExLj8M7HmX8oqx5XIJug7q3leH5kBIZRxuFYLPYkJJLXwdVxF5O7Mbg/ d63AfdGVxjHBgxMnWRJmZAJbXAiXHL8z1y3d9F8aUIBE3gszTLXcmcbDqxWmth8NInlg LPOymmcLUNBSQejPWrrmNdZ8SH8PWxtqgztOpVo/2pxbxxMZBNsXZgjYP6qc4Aja2NSC zuJg==
X-Gm-Message-State: APjAAAWJ0PNv1glC+W8Y6YwpchRni3BOijLJsDl96ssiFu0pK4oGM8+s AYIdqBOI/a2FWjg89C4bwjWEAsK8mU9dR5G56c7OcxFXmWA=
X-Google-Smtp-Source: APXvYqwGH8ktzg9O9bpM5y9Arv/2TN7OZ5ZlCTQ5+cZZKbn4mNfBHVYagRzbAetkYuGUXkOm5A0aoRJpQsCHDaujJac=
X-Received: by 2002:a1c:740a:: with SMTP id p10mr7410683wmc.65.1580932813906; Wed, 05 Feb 2020 12:00:13 -0800 (PST)
MIME-Version: 1.0
From: Michael Bradshaw <mjbshaw@google.com>
Date: Wed, 05 Feb 2020 12:00:02 -0800
Message-ID: <CAHUoET+QjYNe4-peA7k-xWQxy8oznNdj7TVfT_L-xUTC-5gMSw@mail.gmail.com>
To: Codec Encoding for LossLess Archiving and Realtime transmission <cellar@ietf.org>
Content-Type: multipart/alternative; boundary="000000000000c9cead059dd99a60"
Archived-At: <https://mailarchive.ietf.org/arch/msg/cellar/3VzyQMOQkMAh305jRTznhhiXZRM>
Subject: [Cellar] Can there really be "many Blocks in a BlockGroup"?
X-BeenThere: cellar@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Codec Encoding for LossLess Archiving and Realtime transmission <cellar.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/cellar>, <mailto:cellar-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/cellar/>
List-Post: <mailto:cellar@ietf.org>
List-Help: <mailto:cellar-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/cellar>, <mailto:cellar-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 05 Feb 2020 20:00:24 -0000

index_matroska.md
<https://github.com/cellar-wg/matroska-specification/blob/master/index_matroska.md>
currently
says:

"There can be many Blocks in a BlockGroup provided they all have the same
timestamp. It is used with different parts of a frame with different
priorities." (source
<https://github.com/cellar-wg/matroska-specification/blob/master/index_matroska.md#block-structure>
)
"There can be many Block Elements in a BlockGroup provided they all have
the same timestamp. It is used with different parts of a frame with
different priorities." (source
<https://github.com/cellar-wg/matroska-specification/blob/master/index_matroska.md#simpleblock-structure>
)

Neither of these seem right to me since Block has maxOccurs="1"
<https://github.com/cellar-wg/matroska-specification/blob/a577e0da858f56688ffedb975a49cbfacddc667c/ebml_matroska.xml#L138>
.

Is this just an outdated error in index_matroska.md?

Thanks,
--Michael

v2.23.0 | Report a Bug | By Email