u/FollowingPatient6956

Just curious, why would I keep/remove the default tweaks for H265 MKV 2160p60 4K preset:

>strong-intra-smoothing=0:rect=0:aq-mode=1:rd=4:psy-rd=0.75:psy-rdoq=4.0:rdoq-level=1:rskip=2

I realised that removing rskip=2 and/or rect=0 (please confirm?) more than doubles the encode speed on Slow preset.

I'm not sure what the other parameters do – could someone tell me, based on their experience or using or removing them? Thank you.

Why can't I encode an MKV to match the same colours as the original source?

[Source]:

No extra bloom or contrast; colours are rich and standard HDR-looking.

[Encode 1 - Colorspace: Off]:

• H.265 10-bit (x265)
• RF 23.5
• Preset: Slow
• Tune: grain
• Color Range: Same As Source
• Colorspace: Off
• Additional Options: strong-intra-smoothing=0:rect=0:aq-mode=1:rd=4:psy-rd=0.75:psy-rdoq=4.0:rdoq-level=1:rskip=2

Results: contrast seems too high with added bloom effect.

[Encode 2 - Colorspace: BT.2020]:

• H.265 10-bit (x265)
• RF 23.5
• Preset: Slow
• Tune: grain
• Color Range: Same As Source
• Colorspace: BT.2020
• Additional Options: strong-intra-smoothing=0:rect=0:aq-mode=1:rd=4:psy-rd=0.75:psy-rdoq=4.0:rdoq-level=1:rskip=2

Results: Colours look faded/washed out