Is there a chance dolby vision will ever work? as the chipset should be compatible..?
Please read:
Does dolby vision playback for movies work with Libre Elec on the Minix u9-h?
And then buy an Apple TV 4K - only to discover DV will only work for iTunes and Netflix 4K DV online streaming content.
Please read the recent Vero 4K review I have posted over on the Kodi forums:
OSMC announced new Vero4k, opinions?
4k m2ts support is a general Kodi support query, it will work or not work the same for all 4K HDR capable Kodi Krypton hardware platforms.
I have not tested such m2ts video playback only 4K HDR REMUX's in a .mkv container.
Ask over in the Vero 4K thread would be my suggestion or maybe someone here on the LE forums has tested Krypton and 4K m2ts
I have added, based on GDPR-2 's Leia code - a Kodi Krypton user interface selectable setting for 4:2:2,10bit
That is found in the following S912 thread:
Green screens when using 422 have been verified fixed by a few of use now when using the new Kernel. I cannot help with @kszaq's LE 8.2.2.3 version, but black screens when using 4:4:4 are usually a sign of a HDMI cable unable to transmit up to 18Gbps of data.
Sorry to say, but the jerky video playback of 720p-TV channels (H264) has not been solved. Any ideas? Otherwise this has been the best version for 4k HDR until now. Many thanks for your efforts!
Have you set a fallback framerate in Kodi > PVR & TV > Playback settings ?
Mine is set at 50Hz for 25fps TV viewing.
This is the current img.gz I'm using:
Anybody here have a nvidia shield tv? Or can tell me if it can do the following;
Auto switch frame rate,resolution and colourspace when switching from playing 4k hdr files to 1080p and vice versa
The Google Nougat OS on the Shield has No support whatsoever for auto colorspace switching/conversion. You have to do it manually if you want correct color outputs when switching from SDR to HDR viewing. And that manual colorspace manipulation is buried deep in Android settings. Basically it's a long term PITA.
No auto resolution switching either when using Android Kodi Krypton, plus 1080p > 4K picture upscaling quality is below average on the Shield and do not forget Android Krypton deinterlacing is broken for OTA TV viewing.
The Shield does do Android Kodi Krypton HD audio passthrough inc. Atmos and DTS:X and it can read files from a directly connected HDD.
The ATV 4K has to stream 4K HDR content over a local home network like a NAS, file server or a HDD directly USB connected to a modern home router, which is pretty easy to do these days.
You can read all about such auto switching features in the following Kodi thread, follow the Shield links too:
Auto frame rate switching & dynamic range matching - 4K (HDR10) capable Hardware
If you want Plug n Play Kodi Krypton only with excellent after sales support buy a 4K SDR / HDR, HD audio inc. Atmos and DTS:X capable - AMLogic S905X - Vero 4K.
DIY SDR / 4K HDR you use LE Kodi Krypton on a Gigabit ethernet equipped S905X / S912 / S905D. Gigabit Ethernet S912's include such boxes as the U9 and Tanix TX92. All of them can accept direct connect USB HDD's.
Apple TV4K is really nice but one should mention that it lacks of bitstream audio passthrough
Even though the ATV 4K cannot do HD audio passthrough.
7.1 DTS-HD MA, TrueHD, Atmos and DTS:X are lossless decoded to 5.1/7.1 LPCM, which if you do not have Atmos or DTS:X audio equiptment - results in no loss of audio quality anyway.
So it's not such a big deal for quite a number of users. Audio can also be transcoded and output as 5.1 DD too because the ATV 4K has a Dolby Audio licence to allow for such a thing.
3D spacial Atmos and DTS:X metadata is lost when such lossless decoding to LPCM occurs at the media player source and that is what Atmos & DTS:X audio receiver owners are loudly complaining about.... and it's also where a S9xx AMLogic box running LE (or OSMC) Kodi Krypton fills such a need.
LE on the S912 uses what I will call hybrid Android/Linux GPU drivers. This is what draws the Kodi graphic user interface and all those overlays you see on top of video during playback.
There are NO optimised Linux GPU video drivers for the S912 available at all, no matter what the Linux OS used.
It's my understanding kszaq has "robbed" CPU processing cycles to get this hybrid GPU driver to draw the Kodi graphic user interface smoothly without user interface picture tearing that was seen in early versions of LE on S912's.
LE Kodi Leia when streaming ANY copy protected video content like Netflix has to CPU Software decode those h.264 video streams. Max. 720p at the moment because ffmpeg CPU Software decoding and playback is not yet optimised on any AMLogic LibreELEC platforms.
LE on the S912's simply cannot playback CPU Software decoded 720p h.264 smoothly due to the hybrid GPU drivers used.
All Hardware decoded video playback is unaffected by LE on the S912 when using Hybrid GPU video drivers. A co-processor called the VPU handles hardware video decoding.
CPU Software decoded video playback is affected. There really is not much of that on S9xx platforms unless you are using the as previously mentioned Kodi Leia Netflix addon.
The only Gigabit Ethernet DIY S912 option I know of that can dual boot to run LibreELEC and an unofficial Android TV ROM that will give you 1080p Netflix is the MINIX U9. DD+ 5.1 Audio from Netflix on the U9 is a mess.
For 1080p copy protected video playback, like Netflix when using Android you need a box with Widevine L1 DRM and HDCP 1.x
In the end it's a lot easier just buying something like a Plug N Play - Apple TV 4K that has really nice tvOS Firmware Apps support features for auto frame rate and auto dynamic range matching for smooth video playback with the correct SDR and 4K HDR colorspace outputs. Such Firmware Apps support is better than anything Android is offering. Impressive powerful hardware too.
Then use a complimentary - AMLogic S9xx box for LibreELEC Kodi Krypton with all the trimmings.
Maybe if I get time this week. I need to streamline my limited LE build (Virtual Box) system first. Otherwise I will run out of resources.
Display MoreThank you for the information.
I use kszaq 8.2.2.3 build which is working perfect with HD audio passthrough to my Marantz reciever. Can I with this build improve the picture
quality by enable 422.10bit manually ? I am asking because I do not want to have any audio issues now when the passthrough is working so well
with this build.
If so.
Using the command below via terminal SSH
echo "echo '422,10bit' > /sys/class/amhdmitx/amhdmitx0/attr" >> /storage/.config/autostart.sh
Will this be permanently added to autostart.sh ? I can reboot the Minix and autostart.sh is not changed back to default ?
Sorry I am completely new to Linux but I am learning.
If you use:
echo "echo '422,10bit' > /sys/class/amhdmitx/amhdmitx0/attr" >> /storage/.config/autostart.sh
You will get green screen video output with kszaq's LE 8.2.x S9xx AML builds because that uses the old AML Linux Kernel that has a bug in it.
Those sort of terminal commands are only needed if you are watching 4K HDR 10bit video anyway.
With the old kszaq Kernel you actually use this command for proper 4K HDR Chroma and 10bit output:
echo "echo '444,10bit' > /sys/class/amhdmitx/amhdmitx0/attr" >> /storage/.config/autostart.sh
A high speed or premium certified HDMI 2.0a cable is then needed because you will be transmitting a lot more 4K HDR display data over HDMI.
Some people (like hdmkv) have 4K HDR projectors that only support 422,10 or 12bit input - so this was the reason I plugged in the newer AML Linux Kernel in the first place - to fix the 422,10bit green screen issue.
Cheers hdmkv.
The Audio issues I was having (complete silence) was after watching video content with 5.1 AC3 audio and then trying to listen to 2.0 PCM.
Seem to be an issue with this new AML Linux Kernel - which for those reading is this ONE. I've also seen this issue reported elsewhere now as well.
A dazed not sure what is going on there with your OTA TV viewing. It's possibly the new AML Kernel or you actually have a hardware defect, could even be an overheating issue. I've not seen such red dots when I've been watching mpeg2 or H264 TV.
Wizzi07 it might be some sort of issue with a device tree. You might find newer compatible ones in the .img device trees folder included in the following post:
[8.2.2.3] LibreELEC 8.2 for S912
If your device is cactus see the Freaktab forum and reflash Android Firmware with the USB Burning tool software:
Of course you will have to flash the image first to a SD card to access the device tree directory.
The LE team and myself are not going to support or recommend Internal eMMC installs - there simply are too many people coming unstuck when doing it.
The failsafe, bulletproof (if you do not use in Android - the AMLogic Burning tool) LE eMMC copy method is this:
Anybody else still noticing issues with sound completely gone sometimes after AC3 playback with passthrough is started, especially with Live tv stream. ? (It's what I've observed, might be present also with different formats, like DTS.)
If GDPR-1 is using the new AML Linux Kernel in this releases, yes I have seen the same loss of ALL Kodi sound after using passthrough audio and then trying to output PCM audio. I'm using the new Kernel with Kodi Krypton and seeing the exact same issue.
I would say this is a definite audio issue with the new Kernel itself.
From what I've read, The TX92 and the MINIX U9 are the top contenders.
Yes because they have Gigabit ethernet which works well for high bitrate 4K HDR REMUX's with HD audio.
If you want quality buy the MINIX U9, see post #1 for the reasoning.
Basically it's superior hardware, especially it's thermal cooling and Wireless remote that has no issues switching the Box OFF / ON.
U9 is a snappy setup once you copy LE's data partition to faster internal eMMC storage.
Be aware you may encounter slight 4K HDR flickering with the current S912 LE 8.2.x from kszaq
The same as Vero 4K LG OLED users saw it this thread:
HDR Slight flickering (Workaround available) - Vero 4K - OSMC Forums
I know what the dithering fix is for it is, because it's in the newer AMLogic Linux Kernel.
Found the relevant quote from @narmstrong at Baylibre:
S912 has a 10bit pipeline, s905x has only a 8bit to 10bit converter right before the hdmi controller
I need to find out more info about what happens with 10bit video content with the S905X's.
** WARNING ** always do a LE .tar backup using LE Settings and save the file from the Backup folder to an external PC/Mac:
https://wiki.libreelec.tv/accessing_libreelec#tab__sambasmb
Noise reduction is usually only enabled when hardware deinterlacing. ie when viewing OTA deinterlaced TV or deinterlaced DVD's.
Turning it off permanently improves ghosting and smeariness when viewing that type of content, usually TV's do this type of picture post processing better.
Chroma and bit depth usually has to be enabled via issuing a Terminal command after you have logged into LibreELEC.
The new Kernel by default outputs 4:2:2 Chroma at 8 bit depth.
I've added some options in Kodi Settings > System > Down the bottom > Community Features
Based on GDPR-2 's Kodi Leia additions
Simply enable 422,10bit if you are viewing 4K HDR 10bit content and want greater color depth to possibly reduce color banding.
You can leave this enabled for regular SDR content as well, the kernel handles auto switching between REC.709 and BT.2020 for SDR and HDR.
LibreELEC-S912.arm-8.2-Chroma-422.10.img.gz
- there may be some Audio issues with this release after using audio passthrough. Straight 2.0 PCM audio is fine.
- the previously jerky video playback when watching H264 OTA TV seems to have disappeared as well.
(I'm using the Kodi PVR settings, Playback > fallback framerate option)
- for those with a decent 2.1 only audio system and playing 5.1/7.1 audio downmixed to 2.0 PCM.
Set the experimental "Include LFE in stereo downmix" audio option to 100% for extra audio punchiness from the subwoofer.
Yes it's a deinterlaced picture fix that will remove picture ghosting and possibly sharpen up the image.
You can do it yourself:
echo 0 > /sys/module/di/parameters/nr2_en
Keep in mind all S9xx device which has HDR capability produce fake HDR 8 bit and not true 10bit colores.
Actually last I heard only the AMLogic S912's have a true 10bit tunnel from source video to output. Not sure about the S905X.
This info was from Baylibre, the guys that are mainlining the AMLogic S9xx Linux Kernel.
Hi,
Yesterday I bought the Wetek Play 2 ...
When on 4K the audio runs progressivly out of sync when streaming a channel from my TVHeadend ser
Am I missing something? (I must admit that i havent read the whole forum thread)
Set the Kodi GUI to 1080p60Hz if you live in the USA and have an ATSC TV tuner. Otherwise set it at 1080p50Hz.
In Kodi settings > Player > Videos then set:
- Adjust display refresh rate > Start/Stop
Sync Playback to display > Off
Leave the user interface at 1080p. LE will auto refresh switch and auto resolution switch to 4K when you watch 4K content. If your Display supports the required resolutions properly.
Let LE Kodi do the hard work auto refresh switching to sync properly varied video content. Doing it yourself and guessing produces poor results.
Kodi Leia may have playback fluidity problems when watching H264 HD TV because of a brand new Linux Kernel and using An early Alpha Version of Kodi. See how you go.
Is there is any chance to fix IR Remotes with your build?
Reverted all the new Kernel's IR patches to compile this version, it's untested with IR remotes:
LibreELEC-S912.arm-8.2-New.Kernel.tar
Notes:
- deinterlacing - noise reduction is permanently disabled in this version
- 4K 50/60fps video cannot be played back with a Chroma and bit depth of 444,10bit (out of HDMI 2.0 specifications)
- also included is this OSMC AML patch for mixing in the LFE channel when using 2.0 PCM audio.
4K 24p 25/30fps HDR should be using this Chroma settings and bit depth:
echo "echo '422,10bit' > /sys/class/amhdmitx/amhdmitx0/attr" >> /storage/.config/autostart.sh
Well it's Kodi Krypton only and is update compatible with @kszaq's LE 8.2.x Krypton release so yes seperate SD card would be required to flash the .img
Just out of interest can you try S912 Kodi Krypton with the newer AML Linux Kernel from this post:
[8.2.2.3] LibreELEC 8.2 for S912
It's a straight .img.gz update into the update folder. If you have issues go back to the previous S912 LE Kodi Krypton.
