[gstreamer-bugs] [Bug 615471] New: Videoscale filter broken

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=615471
  GStreamer | gst-plugins-base | git

           Summary: Videoscale filter broken
    Classification: Desktop
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: xiphmont at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


The scaling algorithm is simply busted somehow.  It does give
output, but it's obvious compared to, eg, ffvideoscale, that
it's damaged:

   ! video/x-raw-yuv,width=1440,height=1080,pixel-aspect-ratio=4/3 \
   ! videoscale method="1"\
   ! video/x-raw-yuv,width=640,height=360,pixel-aspect-ratio=1/1 \

http://people.xiph.org/~xiphmont/unsorted_images/gst-videoscale.png
http://people.xiph.org/~xiphmont/unsorted_images/gst-videoscale-zoom.png

   ! video/x-raw-yuv,width=1440,height=1080,pixel-aspect-ratio=4/3 \
   ! ffvideoscale \
   ! video/x-raw-yuv,width=640,height=360,pixel-aspect-ratio=1/1 \

http://people.xiph.org/~xiphmont/unsorted_images/gst-ffvideoscale.png
http://people.xiph.org/~xiphmont/unsorted_images/gst-ffvideoscale-zoom.png

Note that all of the videoscale methods are broken, not just method 1.

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