[Bug 727886] GstVideoGLTextureUploadMeta assumes no color conversion is done during upload

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=727886
  GStreamer | gst-plugins-base | git

--- Comment #10 from Nicolas Dufresne <nicolas.dufresne at collabora.co.uk> 2014-04-10 14:04:23 UTC ---
Remains the case where upload meta is present, but not negotiated. In this
case, I'm keen in adding API to the Meta (no field). Basically, that meta in
this case is descriptive, hence no need to negotiate it.

So, my suggestion would be to add (optional) texture caps in the meta. We have
basically two options, add fixes caps and that's it or add unfixed caps, with a
get_current_caps() and set_caps() method. As it is descriptive, all elements
using the meta this way, should be able to fallback using the sysmem mode and
the format described in the pipeline caps (should be all right for glvideosink,
eglglessink and cluttersink).

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