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Понятия не имею при чем тут libxkbcommon. Могу только предложить выключить горячие клавиши.

MPC-HC 64-bit

if you need it to run Cinebench then yes, 2 CPU 20 cores will be better
the thing is most people don't buy PC specifically to run Cinebench

> SVP does not support 20c40t?

it should work... somehow

>  Blu-ray bitrate is very high, need performance beyond ordinary 4K video

this's not a question of bitrate, SVP works with uncompressed video stream
this's about 8-bit vs. 10-bit vs. HDR thing

а оно мешает? нажать ignore
потом если сам SVPManager не будет запускаться, то смотреть что не так в консоли...

HT gives wrong CPU load numbers. "50% CPU load with HT in Task Manager" can mean anything from real 50% to actual 100%.

My CPU shows 45% load with HT and 90% w/o HT with the same settings. But it doesn't mean "HT gives x2 performance boost".

>  Lav теперь и вовсе не поддерживает Windows XP.

следующий на очереди - Avisynth+

Actualy, these are not entirely true
CPU load numbers are half-fake because of hyper-threading turned on.

Here's one more attempt, with Ryzen 8-cores at 3.4 GHz and HT off:

"lvl" = SVP "auto" profile level, 1 is highest settings.

lvl / MPC-HC / mpv

4K H.264 (8-bit)
1 / 90% / 100%, SVP index < 0.9
3 / 70% / 85%
5 / 60% / 70%

4K H.265/HDR (10-bit) -> 8-bit
5 / 60% / 85%

4K H.265/HDR (10-bit) -> 10-bit
Is not supported in MPC-HC, and is not playable in mpv - 60% CPU load while SVP index stays below 0.8.

1. mpv needs more CPU power (~by 20%) for 4K playback than MPC-HC
2. 10-bit 4K is a no-go in current mpv version - something is limiting performance very badly

===

For 1080p 10-bit HDR difference is not so huge.
MPC-HC (8-bit) - 25% CPU load
mpv (8-bit) - 27%
mpv (10-bit) - 34%

BTW, 10-bit mode in SVP is kind of broken - intermediate frames are rounded to 8-bit and colors are incorrect. Will be fixed ASAP.

https://mpv.io/manual/master/#options-playlist

> SVP @4K CPU load is less than 30%

let's say "50%" (at the highest "auto" settings and Ryzen 8-cores at 3.4 GHz), 8-bit video

64-bit MPC-HC uses 3.7 GB of memory for 24->60 at highest "auto" settings (and Ryzen 7 at 3.4 GHz loaded up to 50% in this mode)
32-bit MPC-HC can't even reach 1.0 "SVP index" because it's memory bound with these settings

main.setup.min_duration = 0

https://www.svp-team.com/wiki/FAQ#I.27v … fps_videos