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Old 4th June 2020, 22:07   #1  |  Link
crystalfunky
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Best quality settings for x264 to x265

Hi guys,

I know this has been asked too much already, but here it goes:

x264 video to x265.

Just preset slow, crf 18, no sao, deblock -3:-3, no strong intra, vbv 160000, chromaloc 0, no-hdr10, cll 0,0, no-hdr-opt, no-hdr10-opt

Source: Bluray rip by MakeMKV

Last edited by crystalfunky; 4th June 2020 at 22:50.
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Old 5th June 2020, 10:09   #2  |  Link
Forteen88
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If you got a strong CPU, set --preset slower.

"vbv 160000, chromaloc 0, no-hdr10, cll 0,0, no-hdr-opt, no-hdr10-opt", isn't that only for HDR-video?

UPDATE: Never mind my comment about HDR. I'm real newbie at UHD/HDR

Last edited by Forteen88; 5th June 2020 at 15:25. Reason: HDR...
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Old 5th June 2020, 12:06   #3  |  Link
crystalfunky
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I have a Ryzen 3700x thats why I choose slow instead of slower.

Those settings are indeed for HDR, thats why I disabled them, because I have a x264 video.
Or did you mean something else?

Last edited by crystalfunky; 7th June 2020 at 09:03.
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Old 5th June 2020, 12:09   #4  |  Link
excellentswordfight
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Quote:
Originally Posted by crystalfunky View Post
Hi guys,

I know this has been asked too much already, but here it goes:

x264 video to x265.

Just preset slow, crf 18, no sao, deblock -3:-3, no strong intra, vbv 160000, chromaloc 0, no-hdr10, cll 0,0, no-hdr-opt, no-hdr10-opt

Source: Bluray rip by MakeMKV
I wouldnt turn off strong intra smoothing.

Did some tests in a previous thread, and it seems very beneficial to keep it on:

https://ibb.co/PmRXGF6

"chromaloc 0, no-hdr10, cll 0,0, no-hdr-opt, no-hdr10-opt"

These are not enabled by default, so you dont need to (un)set those. For SDR bluray, just set --colorprim bt709 --transfer bt709 --colormatrix bt709 --range limited if you wanna be on the safe side (if those matches your source ofc).

Last edited by excellentswordfight; 5th June 2020 at 12:12.
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Old 6th June 2020, 07:55   #5  |  Link
crystalfunky
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Interesting, i turned it on again, thanks.

Regardless of that I get quite low bitrates for x264 to x265 encodings. Around 6500 for the Lord of the Rings Bluray with my settings above (crf 18).
Does it even make sense to increase crf even more or should I see the encodings with these low bitrates as good/sufficient?
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Old 6th June 2020, 13:53   #6  |  Link
froggy1
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My recommendations are

crf 21
qcomp 0.7
no-strong-intra-smoothing
no-sao
deblock -3,-3
psy-rd 3.3
psy-rdoq 16

If you have HW support for it, use 10 bits x265. It will someowhat reduce banding

The above settings really shine if you have dark scenes with some noise (inc. mosquito noise)
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Old 6th June 2020, 21:50   #7  |  Link
Forteen88
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Quote:
Originally Posted by froggy1 View Post
My recommendations are
...
psy-rdoq 16
I'm not the OP, but Psy-Trellis produces too much noise for my taste.
OP can use Trim(1000,1500) in his AviSynth-script to do a short video-clip (frame 1000 to 1500) encode just to see if s/he likes that setting though.
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Old 6th June 2020, 22:24   #8  |  Link
froggy1
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Quote:
Originally Posted by Forteen88 View Post
I'm not the OP, but Psy-Trellis produces too much noise for my taste.
OP can use Trim(1000,1500) in his AviSynth-script to do a short video-clip (frame 1000 to 1500) encode just to see if s/he likes that setting though.
It does not "produce" noise. It retains the noise better to match the content as close as possible. If you don't like that, reduce or disable it
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Old 11th June 2020, 11:10   #9  |  Link
Forteen88
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Quote:
Originally Posted by froggy1 View Post
It does not "produce" noise. It retains the noise better to match the content as close as possible. If you don't like that, reduce or disable it
Quote:
High levels of psy-rdoq can double the bitrate which can have a drastic effect on rate control, forcing higher overall QP, and can cause ringing artifacts. psy-rdoq is less accurate than psy-rd, it is biasing towards energy in general while psy-rd biases towards the energy of the source image.
https://x265.readthedocs.io/en/defau...visual-options
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Old 11th June 2020, 11:26   #10  |  Link
Boulder
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In CRF mode without any VBV settings, the bitrate will just shoot through the roof as there's almost nothing limiting it. The artifacts appear if the rate control starts limiting the bitrate availability.
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