Posts by BrianM

Issues with HDMI YCbCr conversion - Raspberry Pi Forums

Tue Oct 16, 2018 10:55 pm

Runing Kodi, you might check:

Code: Select all

tvservice -s

And so you get the current configuration.

Possible options configuring config.txt

Code: Select all

hdmi_pixel_encoding=0 default (limited for CEA, full for DMT)
hdmi_pixel_encoding=1 RGB limited (16-235)
hdmi_pixel_encoding=2 RGB full ( 0-255)
hdmi_pixel_encoding=3 YCbCr limited YCbCr 4:2:0 Y=16-235 (ITU-R BT.709)
hdmi_pixel_encoding=4 YCbCr full YCbCr 4:4:4 Y=0-255

With connection via Yamaha Amp or direct to TV, I get:

##############################################

# LibreELEC #

# https://libreelec.tv #

##############################################

LibreELEC (official): 10.0.0 (RPi4.arm)

LibreELEC:~ # tvservice -s

state 0x120001 [TV is off]

Also - output to TV direct from Pi @ 3840x2160 has now disappeared and a whole set of minor changes in 10.0.0 mean I cannot set refresh rate separately

...oh, and incidentally, couldn't agree more about HDMI Cables and their inability to perform. I bought a dozen, allegedly High Speed (incl "Ethernet") until I got Hologram certified.

OK, so taking the outputs questions:
The (DTR t4000 Humax/BT) UHD YouView box, I have only seen [3840x]2160p 50Hz as an input on the TV. On the box settings it offers UHD 50fps 8 bit or 10 bit
As far as the Yamaha Amp RX-V581 is concerned - it has two HDMI modes:

Selects the format of signals input/output at the unit when HDMI 4K (60 Hz/50 Hz)
compatible TV and playback device are connected to the unit.

MODE 1
Inputs/outputs 4K (60 Hz/50 Hz) signals in 4:4:4, 4:2:2 or 4:2:0 format.
Depending on the connected device or HDMI cables, video may not be
displayed correctly. In this case, select “MODE 2”.
MODE 2
Inputs/outputs 4K (60 Hz/50 Hz) signals in 4:2:0 format.
Note
When “MODE 1” is selected, use a high-speed HDMI cable that supports 18 Gbps. (this is the mode selected, in Mode 2 the YouView box is not recognised as a UHD device)

Also - this HEVC file fails to play (is OK on Win 10 testfile.zipLaptop)

EDID file:
edid.zip

Like this?
http://ix.io/3CVp

Hi chewitt

Hope you are chillin'

I have a long standing problem with my LibreElec 10.0. RPi4B and getting 4k 60hz on my Panasonic UHD TV (meaning I've mostly given up) via my Amp. I was rather hoping to watch Dune in glorious HDR

I have enabled 4k60 and this displays as expected on the single HDMI port if connected direct to the TV. But if I connect this via my Yamaha UHD compatible Amp it fails to passthrough to the TV. (The UHD YouView box connects in this way just fine. Yamaha support claim this is likely to be an HDCP issue.) Is this one of those EDID handshaking issues that still seem to be around?

A further issue arose with HEVC content last night - failed to play Audio (no alternate offered in settings) had to watch it on the Laptop...

Am I missing something?

Thanks

Brian

Hi all,

Have a Raspberry Pi 4 2Gb

Have a problem when connecting two HDMI monitors (using two official microHDMI leads)
RPi4 freezes during boot.

Both screens (1x1080p, 1x2160p) display rainbow splash screen, then HDMI 2 goes blank and boot process hangs.

(I am also trying to do what others have asked, which is to output to both HDMI ports for Vision in 4K from one, and surround sound via Amp on the other...)

Thanks

Brian