[Bug 783585] New: videobox: segmentation fault when changing direction properties

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=783585

            Bug ID: 783585
           Summary: videobox: segmentation fault when changing direction
                    properties
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: patcherwork at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 353446
  --> https://bugzilla.gnome.org/attachment.cgi?id=353446&action=edit
demo app for triggering seg faluts

I am trying to use the videobox element to have a video output that shows video
in its actual pixel size, i.e. 1 to 1 pixel to screen ratio. I want the user to
be able to slide the visible region across the image. Thus I am using the
videobox element, connecting the top, bottom, left and right properties to
sliders. When using the sliders to reposition the visible region, videobox
segments. It would seem that rapidly changing the values triggers a race
condition in the orc code.

I have attached a simple app that seems to be triggering the segment for me. It
is a bit make shift so if it doesn't work please ping me so we can figure out
why. With this app I also seem to be triggering SIGABRT as well. It might be
the same issue or another one.

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