Quote:
Originally Posted by hautem
A little confused and just looking for clarification:
AUTO_QUALITY=n n = 0/1 - Default=1?, 0=Off, 1=On (Menu Selectable)
AUTO_BIAS=n n = 0/1/2 - Default= 1, Auto Quality bias, 0=higher speed, 1=normal, 2=higher quality (From the HIDDENOPTS.TXT file)
ENCODE_QUALITY=n n = 0/1/2/3 - Default= 2, 0=Good (Very Fast), 1=Better (Fast), 2=High Quality (Default), 3=Highest (Very Slow) (Menu Selectable)
ONEPASS_ENCODING=n n=0/1 - 0=One Pass (CRF) Encoding, 1=One Pass (ABR) Encoding (Menu Selectable)
Is there a difference between AUTO_BIAS and ENCODE_QUALITY or is AUTO_BIAS an extension of ENCODE_QUALITY when having chosen AUTO_QUALITY=1?
I've noticed on sources in the 25-30GB range (e.g. "The Bad Lieutenant", "Dr. Strangelove") targeted to full disc BD9, that "Automatic" is selecting ENCODE_QUALITY=0 Good (Very Fast) and ONEPASS_ENCODING=1 (1-Pass ABR) - with "Quicker" Encode for Extras either checked or unchecked. That combination is great for speed (under 3 hrs), but marginal quality on the main movie and noticeably blocky on the smaller files. For the sake of argument, is it possible to select ENCODE_QUALITY=3 Highest (Very Slow) and ONEPASS_ENCODING=1 (1-Pass ABR) and how would AUTO_BIAS=n have an effect on that?
I'm still experimenting and have only tried a few encodes using the "Automatic" setting so far, but just trying to understand how some of the options work in conjunction with each other. I've had excellent results using 2-Pass, High Quality (Default) targeted to full disc BD9 (custom 8210 MB), but reducing the 8-10 hour encoding routine while still maintaining that level of video quality would be nice (if possible).
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Several of the settings you mentioned are not meant to be manually modified and are set by menu selections. Only the items listed in "HIDDENOPTS.TXT" are meant to be directly user modifiable.
AUTO_BIAS isn't an extension of ENCODE_QUALITY. AUTO_BIAS simply sets thresholds for when BD-RB changes settings to higher quality levels (ENCODE_QUALITY) when in "Automatic" mode (AUTO_QUALITY). You will find that there actually is a time when BD-B will select "High Quality" and One-Pass when in "Automatic" mode.
If you like using two-pass -- then use it. You just have to deselect "Automatic"..