PBCore or EBUCore experts?

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greta de groat

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PBCore or EBUCore experts?

PostFri Mar 27, 2015 11:14 am

Are there any PBCore or EBUCore experts in this group?

Can anybody tell me what the PBCore essence track refers to?

Does anyone know if EBUCore has a controlled vocabulary of media formats and whether it covers analog as well as digital objects?

thanks
greta
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kaleidoscopeworld

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Re: PBCore or EBUCore experts?

PostWed Apr 29, 2015 3:11 am

The instantiationEssenceTrack element provides a 'container' for a series of subelements which describe the specific properties of each track of the instantiation (here assumed to be a digital file), i.e., for each track its bit-depth, codec, frame-rate, sample-rate, etc. This (instantiationEssenceTrack) is a repeatable element within the pbcoreInstantiation element, because an instantiation may contain within it several tracks. (e.g., an mp4 file with a H.264-encoded video track and AAC audio track).

The PBCore website is quite comprehensive too - http://pbcore.org/v2/elements/pbcoredes ... encetrack/" target="_blank" target="_blank

Disclaimer: not an expert, this is just based on my reading of the schema.

Edit: I think I have misunderstood the question, sorry for that. I'll leave this post here though in case it's useful for anyone else.
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greta de groat

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Re: PBCore or EBUCore experts?

PostWed Apr 29, 2015 11:01 am

kaleidoscopeworld wrote:The instantiationEssenceTrack element provides a 'container' for a series of subelements which describe the specific properties of each track of the instantiation (here assumed to be a digital file), i.e., for each track its bit-depth, codec, frame-rate, sample-rate, etc. This (instantiationEssenceTrack) is a repeatable element within the pbcoreInstantiation element, because an instantiation may contain within it several tracks. (e.g., an mp4 file with a H.264-encoded video track and AAC audio track).

The PBCore website is quite comprehensive too - http://pbcore.org/v2/elements/pbcoredes ... encetrack/" target="_blank" target="_blank" target="_blank" target="_blank

Disclaimer: not an expert, this is just based on my reading of the schema.

Edit: I think I have misunderstood the question, sorry for that. I'll leave this post here though in case it's useful for anyone else.


Thanks a lot for the explanation, you didn't misunderstand my question. I'm having to do a lot of self-educating on this and i'm still struggling a bit on these complicated multilevel schemas and i'm way out of my depth with what technical details of digital files need to be documented. A container element makes sense to me. I think the terminology confuses me, i've never heard the term "essence track" in another context and wondered if it was some special sort of track.

I think i finally located the EBUcore media list, and it did include analog media though the terms are less user-friendly than the PBCore terms.

thanks
greta
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kaleidoscopeworld

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Re: PBCore or EBUCore experts?

PostWed Apr 29, 2015 1:31 pm

Yeah, "essence track" is tech talk basically, not always common. For digital objects you could think of it as a constituent element of your media file.

My understanding is that the PBCore output would look something like this:

<pbcoreInstantiation>
(elements describing all the higher level file stuff, including the wrapper etc)
<instantiationEssenceTrack>
(details of the video track)
</instantiationEssenceTrack>
<instantiationEssenceTrack>
(details of the audio track)
</instantiationEssenceTrack>
<instantiationEssenceTrack>
(details of the CC subfile)
</instantiationEssenceTrack>
</pbcoreInstantiation>

Take a look at this example: http://pbcore.org/documentation/examples/pbcore-mets/" target="_blank

Of course, the idea is not to handcode your records but to create a system that implements PBCore :)

Disclaimer again: not a metadata expert, but an interested party.

Hope this helps :)

Edit - damn, my careful spacing disappeared. Have added colours instead to make it clearer, middle essence track is orange for easier readability.
Last edited by kaleidoscopeworld on Sun May 03, 2015 7:19 pm, edited 1 time in total.
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greta de groat

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Re: PBCore or EBUCore experts?

PostWed Apr 29, 2015 9:45 pm

kaleidoscopeworld wrote:Yeah, I don't think "essence track" is common terminology elsewhere, although it does make sense to me. For digital objects you could think of it as a constituent element of your media file.

My understanding is that the PBCore output would look something like this:

<pbcoreInstantiation>
(elements describing all the higher level file stuff, including the wrapper etc)
<instantiationEssenceTrack>
(details of the video track)
</instantiationEssenceTrack>
<instantiationEssenceTrack>
(details of the audio track)
</instantiationEssenceTrack>
<instantiationEssenceTrack>
(details of the CC subfile)
</instantiationEssenceTrack>
</pbcoreInstantiation>

Take a look at this example: http://pbcore.org/documentation/examples/pbcore-mets/" target="_blank

Of course, the idea is not to handcode your records but to create a system that implements PBCore :)

Disclaimer again: not a metadata expert, but an interested party.

Hope this helps :)

Edit - damn, my careful spacing disappeared. Have added colours instead to make it clearer, middle essence track is orange for easier readability.


Thanks! Sorry your XML got smushed, you never know how these things are going to display. Interesting the example you point to, in the METS wrapper showing the digital and physical copies.

greta
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Re: PBCore or EBUCore experts?

PostThu Apr 30, 2015 11:08 am

If you want to display XML code here, click on the (code) button and enter your XML code between the markers:

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<begin>
<!-- XML stuff goes here -->
</begin>

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