[gst-devel] tags and metadata

[Mathrick]

W liście z pią, 23-01-2004, godz. 13:54, Benjamin Otte pisze: 
> On Thu, 22 Jan 2004, Mathrick wrote:
> 
> > GST_TAG_FLAGS_INFO ? That indicates the tag is info about stream, not
> > settable (where settable == "imaginable to set in certain
> > circumstances") property.
> >
> But even length-streaminfo is imaginable to be settable as length-metadata
> :p

No. Suppose you have cube-shaped rock, you got from your friend. You can
change its metadata ("from") by saying it's from your parents, but by no
means you can change it's streaminfo ("shape") into "round". You can
_create_ rock with property "shape" == "round", but once it's set, you
cannot change it and claim rock to be the same one as you had earlier.
And what you think of setting "shape-streaminfo" as "shape-metadata" is
in fact you confusing putting label "this is *round* rock" with actually
changing its shape.

> > I suppose this mechanism would provide a way to manipulate both "length"
> > metadata and "length" streaminfo, without having one shadowing other
> > one?
> >
> Tough to do, because different tags are seperated by their name. And you
> don't want to have one named "length-streaminfo" and one named
> "length-metadata".

Hmm, why? As long as it's transparent / internal / implicit /
documented, who cares how are tags named?

Maciej

-- 
"Tautologizm to coś tautologicznego"
   Maciej Katafiasz <mnews2 at wp.pl>
       http://mathrick.blog.pl