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Re: proposed updated response to MPEG on codecs

From: David Singer <singer@apple.com>
Date: Fri, 17 Oct 2014 09:43:04 -0700
Cc: Michael Dolan <mdolan@newtbt.com>, Timed Text Working Group <public-tt@w3.org>
Message-Id: <230AE37F-9F06-4060-91E6-6FA593DFD5FE@apple.com>
To: Nigel Megitt <nigel.megitt@bbc.co.uk>

On Oct 17, 2014, at 2:51 , Nigel Megitt <nigel.megitt@bbc.co.uk> wrote:

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

got it

uploaded as m35323

> 
> 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.
>> 
>> 
> 

David Singer
Manager, Software Standards, Apple Inc.
Received on Friday, 17 October 2014 16:43:42 UTC

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