Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > Video Encoding > High Efficiency Video Coding (HEVC)

Reply
 
Thread Tools Search this Thread Display Modes
Old 21st May 2020, 20:27   #1  |  Link
NathanBluebook
Registered User
 
Join Date: Jan 2020
Posts: 1
HEVC 10-bit colour change

I've been experimenting with HEVC / H.265 recently and I've been seeing an issue with my 10-bit encodes. In certain frames there's some minor changes in colour compared to the source material. 8-bit encodes with the exact same settings don't have this issue. And I also see it in both grainy and clean sources.

Here's an example [click on image or use left/right arrow keys to move between the two frames]: https://slow.pics/c/HSrvtDBt (look at the light hitting the back of his head and the yellow bead on his necklace)

Does anyone know what might be causing this please?

Here's the HEVC parameters I use:
ctu=64 / max-tu-size=32 / tu-intra-depth=1 / tu-inter-depth=1 / rdpenalty=0 / me=3 / subme=3 / merange=57 / no-b-intra / no-amp / ref=5 / no-weightb / lookahead-slices=4 / min-keyint=23 / bframes=8 / aq-mode=3 / aq-strength=1.0 / rd=4 / psy-rd=2.00 / psy-rdoq=1.00 / rdoq-level=2 / no-sao / no-open-gop / rc-lookahead=25 / scenecut=40 / max-merge=3 / qcomp=0.6 / strong-intra-smoothing / limit-refs=3 / deblock=-3,-3 / qg-size=32 / pbratio=1.30
NathanBluebook is offline   Reply With Quote
Old 21st May 2020, 22:25   #2  |  Link
benwaggoner
Moderator
 
Join Date: Jan 2006
Location: Portland, OR
Posts: 3,630
How are you playing it back? Some players do different things with 10-bit and 8-bit source when viewing on an 8-bit display that could cause some differences. That would be the first place I'd look. Like try playing back off USB in a HDR-capable TV that will have a 10-bit pipeline.
__________________
Ben Waggoner
Principal Video Specialist, Amazon Prime Video

My Compression Book
benwaggoner is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 09:05.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.