issues: checkerboard effect in video background zoomed (x265 10bit)

[imhh1]

What could be the cause of this ?
no matter what preset I use in handbrake, this checkerboard effect happens.
i'm trying to encode x265 10 bit files to x265 10 bit files

thank you and sorry for my english

[poisondeathray]

What does your immediate source look like ? Is pattern there?

Is this screenshot 1:1 , or zoomed ? (NM, the title says "zoomed")

How did you take screenshot ?

Might be a dithering pattern. For example from 8bit original souce to 10bit your source

[imhh1]

thanks for answering.
the source looks perfect, the pattern is not there

both screenshots were done using MPC-BE save image as png (madvr)
source:
https://extraimage.net/images/2017/09/26/d8ff7165dd83888de5a29280f3b1146e.png

encode:
https://extraimage.net/images/2017/09/26/81ae2d5ac7aad73c8c42fda600e3b214.png


encode zoom 477%



source zoom 477%

[poisondeathray]

I vaguely recall reading somewhere handbrake doesn't do a clean 10bit pathway. It's actually 8bit pipeline. That could explain the dithering patterns

edit:

- High bit depth encoding support via external shared libraries (video pipeline is still 8-bit 4:2:0)

https://forum.videohelp.com/threads/382292-freeware-x265-encodes-with-10-bit-color

[imhh1]

I vaguely recall reading somewhere handbrake doesn't do a clean 10bit pathway. It's actually 8bit pipeline. That could explain the dithering patterns

edit:

- High bit depth encoding support via external shared libraries (video pipeline is still 8-bit 4:2:0)

https://forum.videohelp.com/threads/382292-freeware-x265-encodes-with-10-bit-color

That makes sense. I don't have this issue with Staxrip.
I love handbrake's GUI more but I guess I'll have to forget about it.

thank you for your help.