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Re: proposed updated response to MPEG on codecs

From: Nigel Megitt <nigel.megitt@bbc.co.uk>
Date: Fri, 17 Oct 2014 09:51:50 +0000
To: Michael Dolan <mdolan@newtbt.com>, "'Timed Text Working Group'" <public-tt@w3.org>
Message-ID: <D066A1E6.14940%nigel.megitt@bbc.co.uk>
Thanks Mike, 

This works for me. One minor typo is that we agreed to call it
processorProfiles (plural) not processorProfile.

I agree the best way forward is to update the IANA registration to
accompany this, and update the TTML2 spec to match. I don't think this is
contentious so, in the interests of getting a usable message back to MPEG,
I'm happy to communicate it now and seek to resolve it formally in one of
the upcoming meetings, though some might consider this the wrong sequence.
My sense is that we've essentially agreed it informally already.

* If anyone objects to this approach please shout ASAP!

I've added Issue-351 for updating the IANA registration, and Issue-352 for
adding a Media Registration Annex to TTML2, similar to Annex C in TTML1,
with 352 to be done after 351 has been completed.

Who can volunteer to update the IANA registration?

Kind regards,

Nigel


On 16/10/2014 23:16, "Michael Dolan" <mdolan@newtbt.com> wrote:

>Take 2 on the communication to MPEG - attached.  Over to Dave (really this
>time).
>
>-----Original Message-----
>From: Michael Dolan [mailto:mdolan@newtbt.com]
>Sent: Thursday, October 16, 2014 1:35 PM
>To: 'Timed Text Working Group'
>Subject: RE: proposed updated response to MPEG on codecs
>
>That would be the proper thing to do.
>
>-----Original Message-----
>From: David Singer [mailto:singer@apple.com]
>Sent: Thursday, October 16, 2014 1:07 PM
>To: Glenn Adams
>Cc: Michael Dolan; Timed Text Working Group
>Subject: Re: proposed updated response to MPEG on codecs
>
>Seems that way
>
>On Oct 16, 2014, at 12:57 , Glenn Adams <glenn@skynav.com> wrote:
>
>> we could always define this new MIME media type parameter in TTML2,
>> but
>wouldn't we need to update the current registration?
>> 
>> On Thu, Oct 16, 2014 at 1:01 PM, David (Standards) Singer
><singer@apple.com> wrote:
>> 
>> On Oct 16, 2014, at 10:22 , Michael Dolan <mdolan@newtbt.com> wrote:
>> 
>> > I cannot support defining a formal media type string (including any
>> > of
>its parameters) on an informal wiki.  This is highly irregular.
>> 
>> agreed.  I think that MPEG should say "the mime type the contents
>> would
>have if in a separate file goes here, with any optional parameters" and
>stop
>at that.
>> 
>> So, MPEG doesn't care how irregular we are, but we should not be
>irregular, of course.
>> 
>> >  I believe its general syntax and semantics must be normatively
>> > defined
>in TTML2 as part of the media type (and preferably in my view) then
>registered with IANA (not the other way around either).
>> 
>> yup
>> 
>> >
>> >                 Mike
>> >
>> > From: Nigel Megitt [mailto:nigel.megitt@bbc.co.uk]
>> > Sent: Thursday, October 16, 2014 9:23 AM
>> > To: Michael Dolan
>> > Cc: Timed Text Working Group
>> > Subject: Re: proposed updated response to MPEG on codecs
>> >
>> >
>> >
>> >
>> > On 16 Oct 2014, at 16:52, Michael Dolan <mdolan@newtbt.com> wrote:
>> >
>> > Thanks for fixes.   I assume Dave will update before posting.
>> >
>> > As for the your second point, I am not sure that I follow.  We must
>define the new media type parameter formally in TTML2 or our decisions and
>this communication are meaningless.  Is your point that we did not agree
>as
>a group to register the update with IANA?  I agree, but I also did not say
>that to MPEG (although I personally think we should).
>> >
>> >
>> > I was expecting the MIME type parameter to be external to TTML2 and
>defined on the registry page. I'm not against updating the IANA
>registration
>if that's useful but we haven't decided to do that. If we do, then clearly
>the relevant part of the TTML 2 spec would need updating to match. If we
>don't, then there may be no changes resulting, in TTML2.
>> >
>> > Since there may therefore be no change in TTML 2 I don't want to
>> > give
>the wrong impression.
>> >
>> > Nigel
>> >
>> >
>> >
>> >                 Mike
>> >
>> > From: Nigel Megitt [mailto:nigel.megitt@bbc.co.uk]
>> > Sent: Thursday, October 16, 2014 8:39 AM
>> > To: Michael Dolan; 'Timed Text Working Group'
>> > Subject: Re: proposed updated response to MPEG on codecs
>> >
>> > Thanks for the quick turnaround Mike. 3 things:
>> >
>> > typo: s/medaType/mediaType
>> > correction: s/procProfile/processorProfiles
>> >
>> > Query: do we want the sentence "Its parameters will be extended in
>> > TTML2
>to include the proposed syntax above." ? Unless we're changing the IANA
>registration then I do not think we have agreed to do this.
>> >
>> > Kind regards,
>> >
>> > Nigel
>> >
>> >
>> > From: Michael Dolan <mdolan@newtbt.com>
>> > Date: Thursday, 16 October 2014 16:29
>> > To: 'Timed Text Working Group' <public-tt@w3.org>
>> > Subject: proposed updated response to MPEG on codecs
>> > Resent-From: <public-tt@w3.org>
>> > Resent-Date: Thursday, 16 October 2014 16:30
>> >
>> > Per my action item from today, please see the attached.
>> >
>> > Over to Dave and Nigel for review to see if I captured where we
>> > ended up
>in today's call; then over to Dave to upload to MPEG (or I can if needed).
>> >
>> > Time is very short and should be posted Sunday morning CEDT.
>> >
>> > Regards,
>> >
>> >                 Mike
>> >
>> > Michael A DOLAN
>> > TBT, Inc.  PO Box 190
>> > Del Mar, CA 92014
>> > (m) +1-858-882-7497
>> > mdolan@newtbt.com
>> 
>> David Singer
>> Manager, Software Standards, Apple Inc.
>> 
>> 
>> 
>
>David Singer
>Manager, Software Standards, Apple Inc.
>
>

Received on Friday, 17 October 2014 09:51:42 UTC

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