[Bug 504672] [ffdeinterlace] crashes with height/width not multiples of 8

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=504672
  GStreamer | gst-ffmpeg | git

--- Comment #5 from Vincent Penquerc'h <vincent.penquerch at collabora.co.uk> 2011-09-09 13:07:09 UTC ---
Created an attachment (id=196109)
 View: https://bugzilla.gnome.org/attachment.cgi?id=196109
 Review: https://bugzilla.gnome.org/review?bug=504672&attachment=196109

ffdeinterlace: reject sizes that ffmpeg will trip on

imgconvert does not support widths that aren't multiple of 8,
and will overwrite the destination.
While there, also reject heights not multiple of 4, which will
just be ignored by ffmpeg, yielding an uninitialized buffer.

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