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Re: Properties for media fragment?

From: Pierre-Antoine Champin <pierre-antoine.champin@liris.cnrs.fr>
Date: Tue, 05 May 2009 20:36:09 +0100
Message-ID: <4A009529.5010402@liris.cnrs.fr>
To: David Singer <singer@apple.com>
CC: "public-media-annotation@w3.org" <public-media-annotation@w3.org>
I'm not sure that I agree with the idea of having a value for property X
*at each instant*...

Back to your copyright example: for me, the copyright is on a whole
media entity, spanning from T to T', even if embeded in a bigger one. It
does not feel right to state that at time T", the copyright is C, just
like it would not feel right to state that the copyright of a book (or
its author, or its title) is the copyright (author, title, resp.) for
each and every word of the book.

  pa

David Singer a écrit :
> At 22:02  +0100 4/05/09, Pierre-Antoine Champin wrote:
>> Hi,
>>
>> I agree with David that "my favourite scenes" is neither 'intrinsic' not
>> 'published'. I also agree to call that 'user' metadata, and would point
>> out that our use case 5.6 [1] is exactly about that.
>>
>> But the properties proposed by Felix are not, IMO, limited to user
>> generated metadata. Some videos are complex, and different fragments may
>> have different intrinsic or published metadata. A canonical example is a
>> news report, which is a composite media object comprising several parts.
>> Both the whole report and each part deserve theit own metadata
>> (intrinsic and published), but it should be possible to express the
>> relation between the whole and the parts.
> 
> right, time-variant metadata is a big question. Most annotation/metadata
> systems think of it as time-invariuant ('applies to the whole
> resource').  However, some things are better time-variant (e.g. the
> copyright owner of a movie assembled from pieces might vary by piece).
> 
> It's easy to design an interface "at  time T in this movie, what is the
> answer to X" and have the reply be "at any time, the answer is Y"
> (time-invariant label).  It's harder to answer "what is the answer to X"
> with "well, that depends on what time in the movie you ask about".
> 
> worth pondering...
> 
>>
>>   pa
>>
>> [1]
>> http://www.w3.org/TR/2009/WD-media-annot-reqs-20090119/#uc-user-generated-metadata
>>
>>
>> Felix Sasaki a écrit :
>>>
>>>
>>>  2009/5/5 David Singer <singer@apple.com <mailto:singer@apple.com>>
>>>
>>>      At 7:14  +0200 2/05/09, Felix Sasaki wrote:
>>>
>>>          List of my favorite scences of a video, as part of the video
>>>          metadata? Does that not make sense?
>>>
>>>
>>>      Oh wow, this is a new category of metadata.
>>>
>>>
>>>
>>>  Is it so new? At least the mechanisms listed in the media fragments
>>>  draft seem to exist for some time. So my assumption was that the
>>>  mechanisms are actually used, and that mapping betweeen them is useful.
>>>  If they exist only as a new category, to be filled by the new fragment
>>>  identifier syntax defined by the media fragments WG, than it does not
>>>  make sense to invest time in their mapping.
>>>
>>>  Felix
>>>
>>>
>>>
>>>       So far I have been seeing
>>>
>>>      * 'intrinsic' properties of the media itself (duration, whether it
>>>      has video, audio etc.)
>>>      * published annotations for the media (copyright, title, etc.)
>>>
>>>      both of these are 'source supplied'.
>>>
>>>      'My favorite scenes' is user-supplied.  Hm.
>>>
>>>
>>>
>>>
>>>      --
>>>      David Singer
>>>      Multimedia Standards, Apple Inc.
>>>
>>>
>>
>>
>>
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> 
> 



Received on Tuesday, 5 May 2009 19:40:11 GMT

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