CE Stable vs Nightly vs CPM Builds - Which is Best for Passthrough with OLED TV Processing?

Hello CoreELEC Community,

As a proud owner of the Ugoos AM6B+ and a videophile enthusiast, I primarily enjoy watching untouched UHD Blu-ray rips and remuxes (Main movie without UHD/Blu-ray Menus). Currently, I have the nightly builds installed on my Ugoos AM6B+. While I appreciate the frequent updates these nightlies receive, I’m beginning to wonder how this might impact the overall performance and stability of my viewing experience.

Specifically, I’m looking for recommendations on which CoreELEC build would provide the best and most stable performance for passthrough, especially since my Panasonic OLED TV handles the processing (Dolby Vision, HDR10+ and HDR10). Should I continue using the nightly builds, or would it be more beneficial to switch to the stable release or consider a CPM build?

I would love to hear your experiences and suggestions. What has worked best for you regarding passthrough performance with OLED TVs? I look forward to your insights!

Thank you!

I think the stable version is now to old to recommend. I prefer nightly and at the moment i use the CPM build with Arctic Zephyr Reloaded for CPM.
May i ask which Panasonic you have and can you use TV led DV? My Panason GZW2004 from 2019 only understand Player led (LLDV).

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Hi ug9923,
I have the Panasonic OLED TX-HZT1506 (HZ1000, HZ1500 & HZ2000 TV lineup) TV Led works perfectly fine for Dolby Vision and HDR10+ no issues have been observed so far.

If I understand correctly CPM builds are tailored enhancements that focus on improved HDR processing among other features, or am I completely wrong about this? Thanks.

Yes, the CPM build uses the VS10 chip for HDR conversions. But i only use the feature “prefer DV over HDR10+”. And it exposes many technical informations (which needs modified skins to display them).
So my Pana is just one year too old.


Confirmed by Vincent! :slight_smile:

Many thanks for this confirmation. Even the Panasonic hotline is clueless.
The answer to my question if TV led or Player led is supported was: yes, DV is supported. That answer is not wrong, but …

After conducting a more in-depth search, I was able to identify the following differences between our OLED TVs:

Panasonic TV Line-up 2019 EU models GZW2004,GZX1509, GZW1004
Processor:
SoC: HCX Pro Intelligent MediaTek MT5598
Core: 4x ARM Cortex - A73, 1500 MHz
GPU: ARM Mali T-860
RAM: 4 GB

Panasonic TV Line-up 2020 EU models HZ2000, HZ1500, HZ100
Processor:
SoC: HCX Pro Intelligent Processor
Core: 4 x ARM Cortex-A73, 1500 MHz
GPU: ARM Mali-G71, 850MHz
RAM: 4 GB

Also a nice video from HDTVtest regarding Dolby Vision TV-Led vs Player-Led Comparison: Which is Better? Link

Some more video footage comparison: Link

By any chance, do you have the specs for the 2022 line-up models such as LZ1500 and LZ2000?

The only difference between 1500 and 2000 is the presence of a Technics sound system on the latter.

Looks like i go for the next LG or Panasonic OLED generation next year.
The problem with Panasonic is that i do not want to pay for a soundbar in the tv.
I always use my AVR and big speakers.

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Precisely the reason I got my LZ1500! I don’t need nor want included soundbars, paying hefty premium fees for something I won’t ever use. My AVR and my big speakers drastically outperform any soundbar, included or not. Currently, at least where I live, there’s no Panasonic top of the line model without the soundbar and I don’t see it changing in the future :frowning:

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Hi boxr4k

Panasonic TV Line-up 2020 EU models LZ2000, LZ1500, LZ1000
Processor:
SoC: HCX Pro AI Processor Mediatek MT 99xx
Source for full specs: Link

Display Specifications
List of Panasonic TVs (also other brands), that are announced: Link

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Based on your link, I guess the specs are:
ParNumber: MediaTek MT9900
SoC: HCX Pro Intelligent Processor
Core: 4 x ARM Cortex-A73, 1800 MHz
GPU: ARM Mali-G52 MC2, 800 MHz
RAM: 4 GB

Why MT9900? Well according the specs, both MT9950 and MT9969 support 8K in display and decoding. The LZ1500’s integrated media player does not support any 8K content and, AFAIR, does not support VP9 content either. So, IMHO, only MT9900 fits the bill. Also, the HDMI 1 and 2 on the TV are only HDMI 2.1 while MT9950/69 support 2.1a

Until I get more info, i’ll stick with MT9900 as the SoC inside the Panasonic LZ1500