Beiträge von PuckStar

Zitat von panec

I have the SK6812 RGBNW and after connecting them to pin 19 - GPIO 10 (https://pinout.xyz/pinout/spi) it seems to be working fine, but I have couple of issues:

• first led is always the same colour and is not changing with the rest
• the config is a bit flaky and sometimes I need to switch to a different LED chip and back to make it work (I use ws2812spi)
• in case of RPi3 and RPi4 I think you need a level shifter 3.3v to 5v - in my case it was blinking like crazy and was not useful
• even with a level shifter, I have occasional blinking of the LEDs that I do not know what might be a reason for (maybe my soldering, but I doubt it)

This was tested on version alpha 8 & 9 so should not be a software issue.

Could you already fix your issues and how?
I'm looking for a new LED strip and want to know if this strip is good enough.

Any response would be appreciated.

Zitat von Cédric Laubacher

Yeah you should see a difference, at least for the Odroid C2 which uses the S905 CPU. On LibreELEC you need to execute this command on every startup, not sure about OSMC

Sorry for the very late reply. I was superbusy and even forgot about your suggestion. Just tried it and.............works!
Didn't try a lot of HEVC stuff but at least 1 movie is working.

Any idea how I can automate the automatic running after a reboot?

Now I still need to fix the colors/saturation/brightness item. That is on the Vera4k I run Hyperion NG and I can't seem to get the colors/saturation/brightness like I had them in Hyperion (on the pi3). I already messages penfold42 who hopefully can help me with that.

Zitat von Cédric Laubacher

try echo 1 | sudo tee /sys/module/amvdec_h265/parameters/double_write_mode
What OS do you use? I'm on LibreELEC, so I don't need sudo

Thanks, that worked :). So should I see a difference now with hyperion and ambilight? In that case I'll do some testing again.
I use the Vero4k OS: https://osmc.tv/vero/

Zitat von Cédric Laubacher

Execute this: echo 1 | tee /sys/module/amvdec_h265/parameters/double_write_mode
works fine with 4k HEVC HDR media on my Odroid C2, although it cant display 10 bit correctly (washed out colors)

I tried it but get a permission denied both with and without sudo:

osmc2:~$ echo 1 | tee /sys/module/amvdec_h265/parameters/double_write_mode
tee: /sys/module/amvdec_h265/parameters/double_write_mode: Permission denied
1
osmc@osmc2:~$ sudo echo 1 | tee /sys/module/amvdec_h265/parameters/double_write_mode
tee: /sys/module/amvdec_h265/parameters/double_write_mode: Permission denied
1

Zitat von penfold42

Are these 10bit colour depth ?

Not necessarily. This one says 8bit.
Here is a mediainfo:

General
Unique ID : 306751288999060812738743055739272096652 (0xE6C6263847B9F14FE6180F25D168EB8C)
Complete name : BLABLABLA1080p.AMZN.WEBRip.DD5.1.HEVC.x265.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 1.08 GiB
Duration : 51 min 50 s
Overall bit rate : 2 971 kb/s
Writing application : Lavf57.51.100
Writing library : Lavf57.51.100 / Lavf57.51.100

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main@L4@Main
Codec ID : V_MPEGH/ISO/HEVC
Duration : 51 min 50 s
Bit rate : 2 272 kb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Bits/(Pixel*Frame) : 0.044
Stream size : 842 MiB (76%)
Writing library : x265 2.3+1-7e225aefd389:[Linux][GCC 5.4.0][64 bit] 8bit
Encoding settings : cpuid=1173503 / frame-threads=3 / wpp / no-pmode / no-pme / no-psnr / no-ssim / log-level=2 / input-csp=1 / input-res=1920x1080 / interlace=0 / total-frames=0 / level-idc=0 / high-tier=1 / uhd-bd=0 / ref=3 / no-allow-non-conformance / no-repeat-headers / annexb / no-aud / no-hrd / info / hash=0 / no-temporal-layers / open-gop / min-keyint=25 / keyint=250 / bframes=4 / b-adapt=2 / b-pyramid / bframe-bias=0 / rc-lookahead=20 / lookahead-slices=6 / scenecut=40 / no-intra-refresh / ctu=64 / min-cu-size=8 / no-rect / no-amp / max-tu-size=32 / tu-inter-depth=1 / tu-intra-depth=1 / limit-tu=0 / rdoq-level=0 / dynamic-rd=0.00 / signhide / no-tskip / nr-intra=0 / nr-inter=0 / no-constrained-intra / strong-intra-smoothing / max-merge=2 / limit-refs=3 / no-limit-modes / me=1 / subme=2 / merange=57 / temporal-mvp / weightp / no-weightb / no-analyze-src-pics / deblock=0:0 / sao / no-sao-non-deblock / rd=3 / no-early-skip / rskip / no-fast-intra / no-tskip-fast / no-cu-lossless / no-b-intra / rdpenalty=0 / psy-rd=2.00 / psy-rdoq=0.00 / no-rd-refine / analysis-mode=0 / no-lossless / cbqpoffs=0 / crqpoffs=0 / rc=abr / bitrate=2434 / qcomp=0.60 / qpstep=4 / stats-write=0 / stats-read=0 / ipratio=1.40 / pbratio=1.30 / aq-mode=1 / aq-strength=1.00 / cutree / zone-count=0 / no-strict-cbr / qg-size=32 / no-rc-grain / qpmax=69 / qpmin=0 / sar=1 / overscan=0 / videoformat=5 / range=0 / colorprim=2 / transfer=2 / colormatrix=2 / chromaloc=0 / display-window=0 / max-cll=0,0 / min-luma=0 / max-luma=255 / log2-max-poc-lsb=8 / vui-timing-info / vui-hrd-info / slices=1 / opt-qp-pps / opt-ref-list-length-pps / no-multi-pass-opt-rps / scenecut-bias=0.05 / no-opt-cu-delta-qp / no-aq-motion / no-hdr
Language : English
Default : Yes
Forced : No
DURATION : 00:51:50.046000000

I'd like to let you know I encounter the same issue. With HEVC (x265) content ambilight is working so bad that I can't use it at all.
Could you guys look into this and try to find a fix?

If testing is needed please let us know!