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Old 26th April 2019, 10:36   #41  |  Link
excellentswordfight
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Originally Posted by Nico8583 View Post
Hi,
I tried some settings and some encodes but I can see every time x265 lose a lot of details, even with a high bitrate (2 pass 35 MBits, CRF16...)
Do you have some tricks to encode ?
Thank you !
Preset slow, or lower, and --no-sao --no-strong-intra-smoothing --deblock -1:-1.

Sounds a bit odd that you lose a lot of detail at crf16 though (unless you are using a fast preset). Mind sharing settings and some samples?

Last edited by excellentswordfight; 26th April 2019 at 10:44.
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Old 26th April 2019, 16:09   #42  |  Link
Nico8583
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Thank you.
I'm using slower or veryslow and no-sao, I'll try others settings. And I'll share my settings and samples.
I'm using Captain America Civil War chapter 17 to make my tests.
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Old 2nd May 2019, 11:11   #43  |  Link
~ VEGETA ~
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how much time does it take to finish your encode? I have an ATOM 2750 CPU dedicated server (yes I know it is not suited for encoding) and it is so slow. I wonder what affordable cpu I could use\buy to suit hevc 1080p encodes? any suggestions?
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Old 2nd May 2019, 13:39   #44  |  Link
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...
I wonder what affordable cpu I could use\buy to suit hevc 1080p encodes? any suggestions?
You should wait until AMD releases their 7nm CPU:s this summer. Intel's CPU-prices (if you're an Intel-fanboi :)) will drop then too.
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Old 3rd May 2019, 09:17   #45  |  Link
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You should wait until AMD releases their 7nm CPU:s this summer. Intel's CPU-prices (if you're an Intel-fanboi ) will drop then too.
Well with the latest Intel generation prices went up rather then down even with Ryzen2 released though... The prices could drop, but I woudlnt just assume that they do.

There is very little information that suggest that Ryzen3 will do much to increase general performance in a significant way. However there are two things that are very promising for the target group on this forum. AVX-performance and probably an 16C/32T mainstream modell.

Last edited by excellentswordfight; 3rd May 2019 at 09:19.
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Old 3rd May 2019, 17:03   #46  |  Link
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So you think it's better to wait Ryzen 3 instead of buy a i9 9900K or i7 9700K ?
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Old 3rd May 2019, 17:47   #47  |  Link
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So you think it's better to wait Ryzen 3 instead of buy a i9 9900K or i7 9700K ?
In this case yes, with the improved AVX performance of Ryzen3 they should give a nice pump in price/performance over the current offering for encoding. But if money isnt a big issue, and you think that you are fine with 16threads, 9900k isnt a bad option. It will still be fast, and probably faster then ryzen3 thread for thread. But I'm pretty sure we will get an 12c/24t chip that is priced under 9900k.
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Old 3rd May 2019, 18:33   #48  |  Link
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Yes you're probably right, Ryzen 3 should be released soon so I can wait thank you
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Old Today, 13:34   #49  |  Link
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I don't wanna start new topic for small question, so I decided ask for help here.
I'm encoding 4k HDR > 1080p HDR with preset Slower, CRF 12-13 with output bitrate 16-17mbps. And my question is how much --merange and --ctu affects to quality?

For example:

--ctu 64 --merange 57 (2.5fps)
--ctu 32 --merange 26 (2.83fps) +13% speed

Avg QP is the same, output file size almost the same (428.2mb vs 428.5mb).

Is it worth spending 13% speed?

Ps: I have i5-9400f 6 core cpu, so just lowering --ctu don't give me boost on speed, all boost from lowering --merange.

My full settings:

--level-idc 51 --sar 1:1 --colorprim 9 --colormatrix 9 --transfer 16 --range limited --master-display "G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,1)" --max-cll "0,0" --hdr --hdr-opt --hrd --chromaloc 2 --repeat-headers --min-luma 0 --max-luma 1023 --no-cutree --no-sao --selective-sao 0 --no-open-gop --no-b-pyramid --no-strong-intra-smoothing --vbv-bufsize 160000 --vbv-maxrate 160000 --min-keyint 23 --keyint 240 --ipratio 1.30 --pbratio 1.20 --deblock -3:-3 --qcomp 0.65 --aq-mode 2 --aq-strength 0.8 --psy-rd 2 --psy-rdoq 2 --rd 4 --limit-refs 3 --bframes 8 --rc-lookahead 60 --subme 5 --me star --ctu 32 --merange 26 --max-merge 4

Last edited by redbtn; Today at 13:50.
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