HDR 10bit fix results in oversaturated colours on SDR 4K content

Help and Support
1

Hi,

The HDR autoswitching option that was recently added to OSMC did not resolve the 10bit banding problems on my display. I was hoping that the July update might improve things but sadly it’s the same and I’m still having to enable 10bit manually (echo “444,10bit” | sudo tee /sys/class/amhdmitx/amhdmitx0/attr) to get HDR content looking right.

The problem is that, when I do this, I get extremely oversaturated colours on 2160p content that is not 10bit.

Here is a log file if it helps:

https://paste.osmc.tv/usonowerih

Many thanks.

2

Hi,

Can you give me MediaInfo output for the HDR and SDR files?
I can resolve this for you.

Sam

3

Sent to your email, Sam.

Many thanks for your help.

4

Sorry. Sent the files to the wrong address. You should have them now.

5

Why must it be this difficult? You’ve only been asked for mediainfo on the files. Why are you not simply using paste.osmc.io, as widely requested all over this forum, and providing the URL here so that Sam is not the only person who can offer support?

6

Easy there, buddy. Not everybody is as well-versed in the normal practises of the forum as you are.

Prior to your post, I had no idea this facility existed. So thanks for the heads-up and here are the MediaInfo outputs.

4K SDR 1 (Plays with oversaturated colours):
http://paste.osmc.io/anevixoquf.coffee

4K SDR 2 (Plays with oversaturated colours):
http://paste.osmc.io/ayugigadec.tex

4K HDR (Plays with no issues):
http://paste.osmc.io/anofugacoc.coffee

9

Hi Sam,

I don’t mean to pester but you mentioned that you had a resolution to this problem. Did you get the chance to look at the MediaInfo files? Let me know if you need more.

Thank you.

10

Sorry – busy weekend working on Vero 4K +.

Do I understand correctly that you only see the issues after enabling 10-bit output, and only see this for SDR material?

If so, this should be resolved shortly

Sam

11

Yes, Sam. That is correct. Glad to hear a fix is on the way. Thanks. :slightly_smiling_face:

12

This will be resolved shortly. I will give you a ping when this is done.

Sam

13

Much appreciated. Thanks. :slightly_smiling_face:

14

Sorry for the late update – but this should have been fixed in the October update.

Please let me know if you still experience issues.

Sam