From martin.leese at stanfordalumni.org Sun Nov 24 16:37:18 2024 From: martin.leese at stanfordalumni.org (Martin Leese) Date: Sun, 24 Nov 2024 09:37:18 -0700 Subject: [opus] Tag lists (Vorbis comments) Message-ID: Hi All, I wasn't sure whether to send this to the Opus list or to a Vorbis list. Even though it concerns Vorbis Comments, the latter seem dead, so I went with the former. The Matroska people have published a draft of Container Tag Specifications; visit: https://www.ietf.org/archive/id/draft-ietf-cellar-tags-15.html Does Xiph want to make use of this, perhaps by making the tags "RECOMMENDED" in the Opus/Vorbis/FLAC specs? Regards, Martin -- Martin J Leese E-mail: martin.leese stanfordalumni.org Web: http://members.tripod.com/martin_leese/ From silverbacknet at gmail.com Sun Nov 24 22:21:00 2024 From: silverbacknet at gmail.com (Emily Fox) Date: Sun, 24 Nov 2024 14:21:00 -0800 Subject: [opus] Tag lists (Vorbis comments) In-Reply-To: References: Message-ID: I think it's reasonable to discuss the comment specs here, if anywhere, given it's the only living aspect of vorbis today. The tag names listed seem to (mostly) be the most common ones used in Vorbis/Opus/Flac as well, and I very much doubt the deviations (ALBUM/DISC/TRACKNUMBER becoming PART_NUMBER at various levels) would ever gain any traction. Aside from that, the Matroska comment specs cannot really be replicated in a reasonable way by Vorbis comments; EBML/Matroska is inherently hierarchical, being based on XML, and this spec uses that capability heavily, while Vorbis comments are inherently flat, and can only simulate a hierarchy with specialized naming conventions. That's why condensing all of those into PART_NUMBERs works. IMHO the only reasonable way to adopt their specs would be to wholesale import the XML metadata, either as text or binary (EBML is a pretty nice and compact binary XML format), something that is mentioned in passing in the old specs as the preferred way for such structured metadata to exist in the first place. No standardized structure for that was ever put forward, to my knowledge. -Em On Sun, Nov 24, 2024 at 8:37?AM Martin Leese < martin.leese at stanfordalumni.org> wrote: > Hi All, > > I wasn't sure whether to send this to the Opus > list or to a Vorbis list. Even though it concerns > Vorbis Comments, the latter seem dead, so I > went with the former. > > The Matroska people have published a draft > of Container Tag Specifications; visit: > https://www.ietf.org/archive/id/draft-ietf-cellar-tags-15.html > > Does Xiph want to make use of this, perhaps > by making the tags "RECOMMENDED" in the > Opus/Vorbis/FLAC specs? > > Regards, > Martin > -- > Martin J Leese > E-mail: martin.leese stanfordalumni.org > Web: http://members.tripod.com/martin_leese/ > _______________________________________________ > opus mailing list > opus at xiph.org > http://lists.xiph.org/mailman/listinfo/opus > -------------- next part -------------- An HTML attachment was scrubbed... URL: