[Bug 774788] New: glcolorconvert oddly shifts frame half way down with 2880x1920 video resolution

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=774788

            Bug ID: 774788
           Summary: glcolorconvert oddly shifts frame half way down with
                    2880x1920 video resolution
    Classification: Platform
           Product: GStreamer
           Version: 1.10.0
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: ste.butcher at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 340423
  --> https://bugzilla.gnome.org/attachment.cgi?id=340423&action=edit
Image that shows the issue

Might have found a possible bug with glcolorconvert.

Trying to playback a video of dimensions 2880x1920, I get an odd shift half way
down the frame in my app/pipeline set-up.

I wanted to be able to show this off outside of my code, and the following
gst-launch command does that:

gst-launch-1.0 uridecodebin
uri=http://tillybutcher.co.uk/test/bbb_2880x1920_1.mp4 ! glupload !
glcolorconvert ! video/x-raw(memory:GLMemory) ! glimagesink

I am attaching a still of how the issue manifests itself.

Other video sizes seem to behave as expected (I tested a 4k video as well as
other lower resolution videos).

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