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I understand that using dct=5 uses the SATD (sum of absolute transformed differences) instead of SAD (sum of absolute differences) for luma. In your experiences, does this improve the motion estimation accuracy in a significant manner? for instance, in fast motion with animation, does it help in preventing blurring/ghosting at quick motion in dark scenes? I'm gonna try this for myself when I get home, but it's nice to hear from others while I'm stuck at this desk.
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