引用处的第一句 Before introducing --rdoq-level, --rd-level 4, 5, or 6 implied what is now --rdoq-level 2.fch1993 写了:不知道没有这个参数之前的BDRIP是表现为level1还是level2。upyzl 写了:doom9上看到的,偶没比过,仅分享下...sborho 写了:about rdoq-level:
Before introducing --rdoq-level, --rd-level 4, 5, or 6 implied what is now --rdoq-level 2. After --rdoq-level, it's enablement is independent of --rd-level but the presets which used to enable it (>= slow) still do. --rdoq-level 1 is actually the same as --rdoq-level 2 except for two short-cuts which prevent certain decimations, which means --rdoq-level 2 can often reduce bitrate quite a bit more than --rdoq-level 1, but --rdoq-level 1 will generally be better at preserving fine detail at the same bitrate (particularly when psy-rdoq is enabled).
顺便如果原来是--rd 0~3,那么对应的相当于是--rdoq-level 0
按我的理解,假如不是transparency或接近于transparency级别的压制,那么2的表现更好一点。感觉有点类似于x264 mbtree/qcomp这种了