- From: Dave Singer <singer@apple.com>
- Date: Mon, 9 Apr 2007 12:07:22 -0700
At 11:59 -0700 9/04/07, Charles Iliya Krempeaux wrote: >Hello, > >On 4/9/07, Dave Singer <<mailto:singer at apple.com>singer at apple.com> wrote: > >WARNING: I have CC'd the co-authors of the RFC, as I think they >might like to see the discussion, comment on my answers, and >possibly correct me. I also have a question whether there is a typo >in the RFC... > >* * * * * > > >Henry > >these are all great questions. Let me see how many I can answer. > >Overall, the RFC was struggling with the issue that there is no >'uniform' naming of codecs; the namespace for codecs is dependent >on the container format, so products that do container conversion >have to have tables of code matches. ugh. That's why the RFC is as >it is. > >The RFC suggests that updated information would be done with RFCs, >which is a little heavy. The RFC as written formally applies to >3GPP files and 3GPP2 files, but the definitions are applicable for >all ISO-family files. > >As you'll see below, 3GPP has also defined it for avc1 in MP4-family >containers, but no spec. or registration authority provides a >pointer. We might want to ask IANA whether we could add something >to the MIME registry. > > >At 11:37 +0300 8/04/07, Henri Sivonen wrote: > >> >> * Theora video and Vorbis audio in Ogg container. (application/ogg; .ogg) >> * Dirac video and Vorbis audio in Ogg container. (application/ogg; .ogg) >> * Theora video and Vorbis audio in Matroska container. >>(video/x-matroska; .mkv) >> * Dirac video and Vorbis audio in Matroska container. >>(video/x-matroska; .mkv) >> > >My understanding is that the Ogg container is 'specific' to these >codecs, and therefore the codecs parameter is not needed. But I am >not an Ogg or Matroska expert; perhaps they could chime in? > > >No. The containers are independent of the codecs put inside. > >However, whether software, that supports Ogg or Matroska containers >will actually be able to "play" other codecs is another issue >altogether. > >[...] > so a defined 'codecs' parameter might be prudent, perhaps. Thanks for the correction. -- David Singer Apple Computer/QuickTime -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.whatwg.org/pipermail/whatwg-whatwg.org/attachments/20070409/2c7bc27a/attachment.htm>
Received on Monday, 9 April 2007 12:07:22 UTC