How to force YUV 4:4:4 on Intel x64 generic ?

atoulmin · April 11, 2024 at 3:28 AM

Quote from sky42

portapro I made a quick rebuild of my last community version with the force YCbCr 4:4:4 patch.

download image here https://sky42.libreelec.tv/testing/intel-yuv444/

here is the full source https://github.com/sky42src/Libre…-240324y-yuv444

this commit you can pick for your own build if it works for you https://github.com/sky42src/Libre…7d8a8158956b078

Edit:
Short test on my N100 -> X6700H -> OLED55E6D show it does what it is suposed to do. All is in YCbCr 4:4:4 says the info screen of my Denon with or without HDR10.
You may run into audio trouble when playing 2160p @ 23.976 Hz and using pass through.
quick workaround is to only use 10 bit not 12
systemctl stop kodi && intel-gpu-max-10-bit.sh && systemctl start kodi

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This works perfect, i have to use the 10-bit option otherwise i get dropouts.

However i noticed that the video output refresh rate is 23.95, not 23.976 which creates stutters. Any ideas?

**chewitt** · April 11, 2024 at 10:11 AM

Kodi rounds values in GUI/logs and often reports 23.98 when the actual rate is 23.976. So if you're seeing 23.98 all is fine. If you're truly seeing 23.95 then something is wrong.

atoulmin · April 12, 2024 at 12:58 AM

Yeah it was 23.95, and my lumagen reported that as well. I ended up using a new build and applying the 10bit patch to it. All fine now.

hugosboss · December 2, 2025 at 7:34 PM

how does one need to change the projects/Generic/devices/Generic/patches/linux/linux-100.01-force-yuv.patch

so it will still work?

I want to use a newer version then 11.95 because of the LFE audio support (i have a capable 2.0 system)

Display Spoiler

Code

ake[1]: Leaving directory '/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/build/libcap-2.77/.x86_64-linux-gnu/libcap'
>>> libcap:host seq 26 >>>
[020/326] [DONE] build   libcap:host
[021/326] [DONE] build   pigz:host
<<< pigz:host seq 27 <<<
GET      pigz (archive)
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
 85  118k   85  101k    0     0  66845      0  0:00:01  0:00:01 --:--:-- 66815
100  118k  100  118k    0     0  78068      0  0:00:01  0:00:01 --:--:-- 78059
    INFO      Calculated checksum: eb872b4f0e1f0ebe59c9f7bd8c506c4204893ba6a8492de31df416f0d5170fd0
UNPACK      pigz
BUILD      pigz (host)
    TOOLCHAIN      manual
make[1]: Entering directory '/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/build/pigz-2.8'
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -I/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/include  -c -o pigz.o pigz.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -I/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/include  -c -o yarn.o yarn.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -c zopfli/src/zopfli/hash.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -c zopfli/src/zopfli/cache.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -c zopfli/src/zopfli/util.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -c zopfli/src/zopfli/lz77.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -c zopfli/src/zopfli/tree.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -c zopfli/src/zopfli/katajainen.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -c zopfli/src/zopfli/symbols.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -c zopfli/src/zopfli/squeeze.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -c zopfli/src/zopfli/blocksplitter.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -c zopfli/src/zopfli/deflate.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -O3 -Wall -Wextra -Wno-unknown-pragmas -Wcast-qual -I/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/include  -c -o try.o try.c
/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/bin/host-gcc -Wl,-rpath,/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/lib -L/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/toolchain/lib -o pigz pigz.o yarn.o try.o deflate.o blocksplitter.o tree.o lz77.o cache.o hash.o util.o squeeze.o katajainen.o symbols.o -lm -lpthread -lz
ln -f pigz unpigz
make[1]: Leaving directory '/home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/build/pigz-2.8'
>>> pigz:host seq 27 >>>
[022/326] [FAIL] build   linux:host

The following log for this failure is available:
  /home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/.threads/logs/25.log

<<< linux:host seq 25 <<<
GET      linux (archive)
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  1  146M    1 1950k    0     0  5316k      0  0:00:28 --:--:--  0:00:28 5315k
 13  146M   13 19.7M    0     0  14.4M      0  0:00:10  0:00:01  0:00:09 14.4M
 25  146M   25 37.8M    0     0  15.9M      0  0:00:09  0:00:02  0:00:07 15.9M
 38  146M   38 55.8M    0     0  16.5M      0  0:00:08  0:00:03  0:00:05 16.5M
 50  146M   50 73.8M    0     0  16.9M      0  0:00:08  0:00:04  0:00:04 16.9M
 62  146M   62 92.0M    0     0  17.1M      0  0:00:08  0:00:05  0:00:03 18.0M
 75  146M   75  109M    0     0  17.2M      0  0:00:08  0:00:06  0:00:02 18.0M
 86  146M   86  127M    0     0  17.2M      0  0:00:08  0:00:07  0:00:01 17.8M
 99  146M   99  145M    0     0  17.3M      0  0:00:08  0:00:08 --:--:-- 17.8M
100  146M  100  146M    0     0  17.3M      0  0:00:08  0:00:08 --:--:-- 17.8M
    INFO      Calculated checksum: 5a8de64a75fca706c01c6c0a77cf75a74618439db195e25f1f0268af6b2fb1da
GET      intel-ucode (archive)
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0

100 14282    0 14282    0     0  20884      0 --:--:-- --:--:-- --:--:-- 20884
100 14.6M    0 14.6M    0     0  9279k      0 --:--:--  0:00:01 --:--:-- 15.7M
100 15.8M    0 15.8M    0     0  9629k      0 --:--:--  0:00:01 --:--:-- 15.8M
    INFO      Calculated checksum: 5a9a0d17240f486461bc101ef74f2b8c10675cdd02d0ba0bd6168b061c62e970
UNPACK      intel-ucode
UNPACK      linux
    APPLY PATCH (common - default)      packages/linux/patches/default/linux-062-imon_pad_ignore_diagonal.patch
patching file drivers/media/rc/imon.c
Hunk #1 succeeded at 1439 (offset 95 lines).
    APPLY PATCH (common - default)      packages/linux/patches/default/linux-999.02-0001-pm-disable-async-suspend-resume-by-default.patch
patching file kernel/power/main.c
Hunk #1 succeeded at 123 with fuzz 2 (offset 77 lines).
    APPLY PATCH (device)      projects/Generic/devices/Generic/patches/linux/linux-100.01-force-yuv.patch
patching file drivers/gpu/drm/i915/display/intel_hdmi.c
Hunk #1 succeeded at 2234 with fuzz 1 (offset 38 lines).
Hunk #2 FAILED at 2215.
Hunk #3 succeeded at 2333 (offset 86 lines).
1 out of 3 hunks FAILED -- saving rejects to file drivers/gpu/drm/i915/display/intel_hdmi.c.rej
*********** FAILED COMMAND ***********
patch -d "${PKG_BUILD}" -p1 < ${i} >&${VERBOSE_OUT}
**************************************
*********** FAILED COMMAND ***********
${SCRIPTS}/unpack "${PKG_NAME}" "${PARENT_PKG}"
**************************************
FAILURE: scripts/build linux:host has failed!

The following log for this failure is available:
  /home/user/LibreELEC.tv/build.LibreELEC-Generic.x86_64-13.0-devel/.threads/logs/25.log

>>> linux:host seq 25 >>>
Parallel build failure - see log for details. Time of failure: Tue Dec  2 20:18:00 CET 2025
make: *** [Makefile:10: image] Fehler 1

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I have no idea what I am doing + I have no idea what I am doing wrong

I was following this https://wiki.libreelec.tv/development/build-basics + nano projects/Generic/devices/Generic/patches/linux/linux-100.01-force-yuv.patch copy paste from https://github.com/sky42src/Libre…force-yuv.patch

**chewitt** · December 3, 2025 at 12:31 AM

The patch was authored for Linux 6.6.22 and the master branch currently targets Linux 6.17.8; so the kernel code the patch targets has changed and the patch cannot be applied.