Set whether presentations in pixel metrics can scale or not (presentations
that are in meter metrics always scale such that the display width is
+/- one meter and vertical dimension is ratio of height/width as per
MPEG-4 Systems specification)
Set speed scaling hint - set true to do scaling by speed, false to do quality
When true, and when the content has a preferred size, scaling is done at the
final point of rendering, the composition being created at the preferred size.