Hi Stan,
> part) the spikes occurred in Enc1. From what I saw Pass2 was "usually"
> lower. Not to say that's always true.
That pass-2 quantisation is what determines final quality. It can spike but
this is only if the input is genuinely hard-to-encode for a complete GOP
(group-of-pictures). Individual 'tough' frames in a GOP (in effect) borrow
bits from other frames.
cheers,
Andrew
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