[gstreamer-bugs] [Bug 623799] New: [xmp] Configurable xmp output

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=623799
  GStreamer | gst-plugins-base | git

           Summary: [xmp] Configurable xmp output
    Classification: Desktop
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: thiago.sousa.santos at collabora.co.uk
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


XMP spec aggregates multiple tag systems/groups, called schemas. Examples:
exif, iptc, photoshop, dublin core...

One use case that isn't covered is to allow applications to select which ones
should be used when serializing a taglist to the streams. This requires working
at 2 levels.

1) Implement a configuration struct/parameter for the xmp lib in
-base/gst-libs/tag, allowing elements to inform which schemas should be used.

2) Implement a way for elements to expose this API to applications.

I haven't started working on this (yet), but I thought it would be nice to
start discussing here so I can start on the correct direction.

The xmp schemas are represented by strings, here are some:
* dc
* xap
* photoshop
* tiff
* iptc

Check http://www.adobe.com/devnet/xmp/pdfs/XMPSpecificationPart2.pdf for more
information.

So I was thinking to have some API to blacklist/whitelist what schemas to use,
this is simple (from the API point of view) of adding to the taglib, but how
should we expose it from elements?

As I don't know any other specs similar to XMP, I think an specific interface
would be nice for configuring it, rather than going the generic way. Do we have
any other options here?

We could also create a GstTagSetter2, but I really can't think of a nice API
that would be able to handle all this generically. Maybe someone out there has
a better idea?

-- 
Configure bugmail: https://bugzilla.gnome.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug.
You are the assignee for the bug.