[Bug 741987] videoscale performance regression

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=741987
  GStreamer | gst-plugins-base | git

--- Comment #5 from Wim Taymans <wim.taymans at gmail.com> 2015-01-07 15:09:40 UTC ---
The best thing to do is this:

 - make videoscale negotiate the same colorimetry on in and output, in the
   example it uses the HD and SD colorimetry on in and output and thus needs to
   do a conversion.
 - avoid chroma up/downsampling by doing scaling directly on the subsampled
   planes

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