>For the benefit of those here who don't know, the first
>pass in a two-pass encode collects data about the
>complexity of the various "scenes" in a video, and then
>balances the allocation of bits over time optimally.
>The benefits of 2-pass are, in a general sense, inversely
>proportional to the average bitrate chosen, but two-pass
>will ALWAYS produce better quality high-action scenes
>than ANY other method - For reasons that should be
>self-evident.
I don't want to get involved in a holy war either (: but let me correct
your statement: "*Ideal* two-pass will ALWAYS produce better quality
high-action scenes than ANY other method". I couldn't find any
humanly-noticeable difference between CRF and 2-pass in my (admittedly
limited) testing, so it may be that x264's 2-pass algorithm is less than
ideal, or that 2-pass does a better job on anime than on live material,
or just that I don't normally encode at such low bitrates that the
difference would become apparent.
--Andrew Church
achu...@achurch.org
http://achurch.org/
