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Most Hollywood DVDs are encoded with old Sony Vizaro encoder, Toshiba encoder or Cinemacraft Xtream (or even SP2/SP3).
First 2 are not as good as Xtream, because they are very old.
Xtream/SP3 use Adaptive GOP an Adaptive QM and I can't see any other encoder which can be better for film source. Both will use many QM over whole encode and keep switching them from scene change to scene change or even per GOP.
I would never show Hollywood DVD as a reference one. They just have very good sources and if you add eg. Xtream encoder it comes as very good encode even at default settings.
Andrew
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