[gstreamer-bugs] [Bug 617512] [alpha] should work in passthrough in all formats if alpha == 1.0

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=617512
  GStreamer | gst-plugins-good | git

Benjamin Otte (Company) <otte> changed:

           What    |Removed                     |Added
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                 CC|                            |otte at gnome.org

--- Comment #1 from Benjamin Otte (Company) <otte at gnome.org> 2010-05-03 11:31:01 UTC ---
Wouldn't that mean the caps are dependant on when the alpha value was last set
- i.e. if you started with alpha=0.9 and while the pipeline ran set it to 1.0
you'd get AYUV, but if you started with alpha=1.0 and didn't set it you'd end
up with I420?

Or would that mean that for a controlled channel with a tween from 1.0 to 0.0
you'd get I420 in the beginning and AYUV when the tween starts changing the
alpha value? Would that mean pipelines that miss a colorspace element could
error out half-way through?

So in short I think it's a bad idea to make the negotiated caps depend on a
controllable (i.e. settable while the pipeline runs) property.

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