[annodex-dev] captioning and cmml

[Michael Dale]

I think Option 2 should work as well... I could throw together a ajax 
caption type demo if someone specs out basic close caption stuff... An 
obvious target would be the w3 workshop next month. Oggplay already has 
hooks into the CMML... but the demo would look prettiest in ff3 since 
you can do overlays there ;)
parallel access to the CMML seems to have some advantages:
* client side applications could just request the CMML if their playback 
system did not support accessing it from the ogg stream
* if the metadata is contently changing ie wiki text, it does not seem 
efficient to mux it every time its requested..
* Additionally other web services will want to request just the CMML 
stream by itself without the heavier ogg media.
but there is no reason why both muxed and parallel access can't be 
supported simultaneously. (I think thats how annodex is supposed to work 
anyway no?)

Integrating it with mv_embed on other playback system it will just have 
to display the html/captions to the side or below the video.  I am 
already working in that direction with associative text layers: 
If you want to see an early pre-alpha version of the video editor wiki 
integration check out:
http://mvprime.cse.ucsc.edu/mvWiki/index.php?title=Sequence:Test&action=edit

Associative text layers ie captions will be separate tracks that just 
point to associative metadata like the captions layer visible in the 
metadata view:
http://mvprime.cse.ucsc.edu/mvWiki/index.php/Stream:Senate_proceeding_08-01-07
(and or text/html layers will be generated with dynamic mediawiki 
template magic.. but more on that and the rest of the metavidWiki 
feature set later ;)

peace,
michael




Silvia Pfeiffer wrote:
> Hi all,
>
> I'd like us to discuss and make a decision on what to do with subtitles in CMML.
>
> Chris Chiu has created an awesome wiki page that discusses the issues
> and provides three options to go forward:
> http://trac.annodex.net/wiki/CmmlSubtitles .
>
> Option 3 assumes that subtitles will be handled outside CMML - in
> something like DFXP (see
> http://www.w3.org/TR/2006/CR-ttaf1-dfxp-20061116/), which would need
> to be serialised and a Ogg media mapping defined to be encapsulated
> inside Ogg.
>
> While this is a clean solution to a problem that is so far orthogonal
> to CMML (with its hyperlinking ideas), it would be nice if we could
> have a simple means to include subtitles or anime type formats
> directly inside CMML. Option 1 is a very unclean means of doing so, so
> my suggestion is to adapt Option 2 and create an additional element
> for CMML called "caption". This element can adopt some of the
> attributes that the W3C DFXP standard has defined for captions.
>
> I'd be curious to hear your positions on this.
>
> Cheers,
> Silvia.
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