Why does the CPU usage varies with different codecs?

I was wondering why this is the case: when I visited the same sequence of a my CPU use Quicktime runs from 75 to 95% and return rips by in almost faster than real-time (love it!)  But when I render the same sequence, even the clips and effects and a MXF file sub it he walks by along.  And as it works on some sequences RED almost stops.  If it's normal SOP, OK.  I want to just make sure that is not operator error.

RG

It is not a user error. Some codecs are just run better than others.

Tags: Adobe Media Encoder

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