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Other recommendations to be found and posted by you
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Tested last evening:
patternAdaptivity = 1 gives also to me around 0.5 db of average psnr gaining!!
(readed from rv9log.txt, tested on Animatrix - World Record)
patternAdaptivity = 0 or 3 results in a psnr loss compared to standard adaptive method
I'll test on other clips (this one was a very clean source) to see if this gaining is really generalized or if it was an exception (karl: what/how was your test's source clip?).
I'd like to point out a strange behaviour: from my last evening tests i've obtained lesser psnr values for 2pass encodings than for 1 pass encodings (if you need i can attach all the logs, let me know), is it possible that 2 pass gives a worser result or maybe psnr is not the right metrics to judge the 2pass encoding improvements?