Re: [blink-dev] WebVTT vs TTML Features

Well TTWG is on this thread: is anyone able to provide such statistics?

Cheers,

Nigel


On 10/12/2013 11:52, "Silvia Pfeiffer" <silviapfeiffer1@gmail.com> wrote:

>Right, but again that doesn't explain what features are actually used
>in actual TTML files of whichever flavor. As there must be quite a lot
>of TTML content by now, it would be good to be able to get a feeling
>for what features are being used in actual authoring / content
>management systems. Maybe it's worth asking the members of the TT-WG
>for some statistics from their own systems? They don't have to share
>actual TTML files, but they can just take an internal survey.
>
>Cheers,
>Silvia.
>
>
>On Tue, Dec 10, 2013 at 9:21 PM, Nigel Megitt <nigel.megitt@bbc.co.uk>
>wrote:
>> Additionally, TTML is used in e.g. SMPTE-TT, EBU-TT, CFF-TT, SDP-US etc
>> which I believe collectively reference all of the features in TTML.
>>
>> Nigel
>>
>>
>> On 09/12/2013 19:50, "Glenn Adams" <glenn@chromium.org> wrote:
>>
>> I for one can't answer the question about actual use. First, TTML is
>> designed for both interchange amongst authoring and archiving systems
>>and
>> for distribution between content service providers and end-user devices
>> (browsers). In the former case, this content is generally in closed
>>systems
>> not exposed for examination, in the latter case, I have seen no use
>>counter
>> statistics gathering.
>>
>> If Chrome implemented TTML support then we could add UseCounters to
>>gather
>> these metrics for TTML content used for distribution.
>>
>> There is some possibility of gathering statistics another way, which is
>>that
>> I expect a TTML validator to go online at the W3C perhaps in the 1st
>>quarter
>> of 2014. This validator could catalog usage statistics over time and
>> eventually provide useful frequency of use information.
>>
>> It might be useful to query caption houses or large content archive
>> maintainers (e.g., Time Warner - HBOGO, etc., Netflix, and so on) for
>>such
>> data.
>>
>> G.
>>
>>
>>
>> On Tue, Dec 10, 2013 at 3:43 AM, Loretta Guarino Reid
>> <lorettaguarino@google.com> wrote:
>>>
>>> I'm confident that the features are in the requirements. The question
>>>is
>>> about actual use.
>>>
>>>
>>> On Mon, Dec 9, 2013 at 11:41 AM, Glenn Adams <glenn@chromium.org>
>>>wrote:
>>>>
>>>>
>>>> On Tue, Dec 10, 2013 at 3:37 AM, Loretta Guarino Reid
>>>> <lorettaguarino@google.com> wrote:
>>>>>
>>>>>
>>>>> On Mon, Dec 9, 2013 at 6:54 AM, Nigel Megitt <nigel.megitt@bbc.co.uk>
>>>>> wrote:
>>>>>>
>>>>>> >How many of these 114 features are actually in use in the wild?
>>>>>>WebVTT
>>>>>> >has a strong drive to only support features that are motivated by a
>>>>>> >use case. If any of these features are necessary, WebVTT can be
>>>>>> >extended to support them. Some of them (like the 'padding' above)
>>>>>> >would be fixed simply by adding the feature to the list of
>>>>>>supported
>>>>>> >CSS properties, which takes less than 5min to fix. It would be best
>>>>>> >for us to find this out before we freeze the spec. Any input on use
>>>>>> >cases would be welcome.
>>>>>>
>>>>>> Considering the amount of scrutiny and effort that's been put into
>>>>>> developing TTML over many years it's safest to assume that all of
>>>>>>the
>>>>>> features have a use case/requirement within the overall scope of
>>>>>> requirements rather than starting from the opposite perspective.
>>>>>> Different
>>>>>> subsets of these features may be needed for different parts of the
>>>>>> entire
>>>>>> author->audience workflow.
>>>>>
>>>>>
>>>>>
>>>>> I would hope that the amount of scrutiny and effort that has gone in
>>>>> would make it easy to respond to this request, since you would know
>>>>>where
>>>>> the features are needed, hence where to look for the examples.
>>>>
>>>>
>>>> I would suggest folks that wish to explore this further start by
>>>>reading
>>>> the Timed Text Authoring Use Cases and Requirements document at [1],
>>>>which
>>>> served to drive the specification of TTML1.
>>>>
>>>> [1] http://www.w3.org/TR/2006/NOTE-ttaf1-req-20060427/
>>>>
>>>
>>
>>
>>
>> ----------------------------
>>
>>
>>
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Received on Tuesday, 10 December 2013 11:56:43 UTC