[Bug 781759] visualizations fail with vaapi

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=781759

--- Comment #2 from Víctor Manuel Jáquez Leal <vjaquez at igalia.com> ---
Created attachment 350478
  --> https://bugzilla.gnome.org/attachment.cgi?id=350478&action=edit
plugins: handle pixel-aspect-ratio with value 0/1

When downstream negotiates a pixel-aspect-ratio of 0/1, the
calculations for resizing and formatting in vaapipostproc and
vaapisink, respectively, failed, and thus the pipeline.

This patch handles this situation by converting p-a-r of 0/1 to
1/1. This is how other sinks, such as glimagesink, work.

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