I just updated my Homatics Box R 4K Plus with the latest Android 12 v7954 update and noticed that I also lost Disable Dolby Vision support and Use Player Led when i rebooted back to Coreelec. Reimaged with the latest nightly and then one from the 11th. Still not showing the DV options. I did put the correct dovi.ko in the root after creating the dtb.img. I have had it working multiple times before and no issues with my AM6b+.
No issue here. Same firmware, dolby vision works fine both NE and NG version.
I also updated to the v7954 build yesterday but for me DV still works fine.
I was running cpm’s A5 build and also tested the CE21-NG 20241017 nightly. Both are OK.
Is it recommended to update android if we only use the device for CE?
Yeah sorry for the false alarm. It ended up being my TV. Kodi system information was showing the TV didn’t support DV. I was only able to get DV support after unplugging the TV for 30 secs.
Hi folks,
Currently using a Rocktek G2. Have some questions on the two CoreELEC installation methods.
Reset Button Method:
- The Rocktek G2 has no power button.
- The “Reset” button seems to be something called “Recovery” on the bottom of the unit.
- Do I just press the “Recovery” button, plug in the power supply and wait for CoreELEC to load on the screen?
ADB Method:
- How do I enable ADB in the Rocktek Device?
- Following that, what program do I use to send the command “adb reboot update”?
- If there’s a pictorial guide / youtube video. that would be very much appreciated
Many thanks in advance.
Just read the troubleshooting guide. Sorry about that, re-posting with debug logs.
My video chain is as follow:
Homatics Box R 4k Plus → Sony XBR Z9F TV via HDMI input
Did a full fresh install and followed the guide:[Guide] Homatics Box R 4k Plus CoreELEC installation, configuration and modding
Corelelec version: https://relkai.coreelec.org/Amlogic-ne/ce-20/CoreELEC-Amlogic-ne.aarch64-20.5-Nexus_nightly_20240413-Generic.img.gz
Coreelec did boot up and fine.
However when I try to play a test video from the Kodi samples pages (Link: 1 minute HDR10+ system test - FF Pictures GmbH | Florian Friedrich ), I do not get the required fps
I have whitelisted 4K @ 60 Hz, so this should play with a stable fps.
Pressing the O button on the keyboard shows me that the video is being HW decoded and my TV supports the resolution. I have tried playing other supported formats with the same issue. I even tried watching live tv and I still cant get the proper frame rate.
I have tired pressing the alt+o button and I see drop frames =0.
To troubleshoot I replaced the Homatics box with a fire stick 4k max running kodi v21 and the issue is resolved.
I loaded libreelec 12 on my 10 year old AMD laptop and everything works fine. I get the proper fps.
Then I tried loading libreelec 12 on my RPI 4B model and I get the same issue as the Homatics running Coreelec. Weird, see pics below
Any suggestions?
DEBUG LOG LINK: https://paste.coreelec.org/WithdrawProgram
How you know it’s not stable fps?
Log shows it is.
First update to latest CE-21. CE-20 is final and EOSD.
Make clean install and just try again - without any whitelist!
4k@60hz do require high quality HDMI cables!
Hello! I couldn’t find much information online, so I thought to ask here.
What are the main differences between the Homatics Box R 4k Plus and the Ugoos AM6B+? I could only find that the Homatics supports apps like Netflix and the Ugoos doesn’t. Is that the only difference?
My use case is gonna be playing bluray remuxes with DV. And YouTube. Maybe some other streaming apps like Netflix a few times a years, but my TV supports these apps.
They are based on different SoCs. The one in Ugoos is older, but more powerful. SoC in Homatics is a weaker one, but supports AV1 decoding if that’s important for you and runs a streaming-certified Android. Both support DV P7 FEL playback in -ng branch. If I’m not mistaken, SoC in Homatics might get more support in the future due to newer kernel. Whether there will be DV FEL support for newer linux kernel is still not known (and is mostly an external factor). So to sum it up: If you need it to play remuxes with DV and FEL is important for you then Ugoos is the best choice atm. Full functionality for this box might end at CE-21 due to old kernel and future versions might not offer everything, but CE-21 should be enough for your use-case for a long time, imho.
Thank you for the detailed response! I think I’m just gonna get the Ugoos like you said. Especially since there’s much more info and support about it out there.
Shouldn’t the system rendering speed show the fps ? If the fps is proper, it should match the frame rate of the source and stay fairly constant.
The value of the system rendering speed keep fluctuating in all the above pics and isn’t stable.
I have verified the hdmi cable is able to support 4k@60hz.
I will try again with the latest ce21. Should I use stable or latest nightly ?
Thanks for your time.
No, the fps shown is the gui renderer.
It’s unrelated to video FPS.
It’s depending of how much work for the renderer is to do and FPS goes from 0 to current video FPS.
The video FPS is constant the current display mode FPS.
I am running ng for FEL with no issues.
I am now using 500GB Samsung T5 SSD usb drive for the CE image to store some local TV Series on a bedroom TV (so I don’t need to have my NAS running)
Greetings,
I own a nokia 8010 that is running latest ne. According to various sources only ng is able to play fel on this device with the dovi file added manually. At the moment only 8 bit colour is being output with dovi according to my denon av. Hdr10(+) does 12 bit. Would be nice if dovi on the nokia with ne did that too.
When will fel be added to ne and when will ng be end of life?
Thank you!
Edit: first sentence stated ng, but must be ne.
FEL in NE → Nobody knows. It needs a dovi.ko file with FEL support that is compatible with kernel 5.x. If it even exists. Could be never.
Your Denon AVR is probably showing an 8-bit RGB signal, which is correct when using TV-led DV, because this uses RGB tunneling. If you switch to player-led DV, you will see a 12-bit YCbCr signal. But you’re better off using TV-led, because in that case your TV will handle tone mapping etc. which is normally preferred compared to having the player process the DV signal.
Thank you for the clarification. How does this apply to hdr10(+) content? Does the display (or projector in my case) handle tonemapping just like tv-led dv? And will switching to ng have a noticeable improvement over ne because of fel? Will it still be rgb 8 bit or does something else change “under the hood”?
When playing a hdr10 file my denon says ycbcr 4:4:4 12 bit bt2020.
HDR10(+) content is not tunneled, so you will see 12-bit YCbCr as you already mentioned.
Switching to FEL will improve image quality usually (often with regards to brightness), but it does vary depending on the movie. And yes, using TV-led output with FEL will still use RGB tunneling.
If you’re using a projector, you might want to take a look at a special build of CE21-NG, made by @cpm that has more options to tweak the output with regards to peak brightness levels etc.:
Releases can be found here: