4K video 3824x1588 is downscaled to 1920x1080 (TV 4K capable)

limmes · October 21, 2023 at 7:41 PM

Hi,

RPi4 latest Libreelec.

4K video with resolution 3824x1588 is downscaled to 1920x1080 (TV is capable playing 4K videos and plays perfectly standard 4K resolutions)

Code

2023-10-21 17:37:14.801 T:1033     info <general>: [WHITELIST] Searching the whitelist for: width: 3824, height: 1588, fps: 23.976, 3D: false
2023-10-21 17:37:14.804 T:1033     info <general>: Display resolution ADJUST : 1920x1080 @ 23.976025 Hz (40) (weight: 0.000)

Question: is there a way to force upscale to standard 4k resolution rather than downscaling to FHD

Video:

Code

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main 10@L5@High
Codec ID                                 : V_MPEGH/ISO/HEVC
Duration                                 : 1 h 43 min
Bit rate                                 : 20.4 Mb/s
Width                                    : 3 824 pixels
Height                                   : 1 588 pixels
Display aspect ratio                     : 2.40:1
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Original frame rate                      : 23.976 (23976/1000) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 10 bits
Bits/(Pixel*Frame)                       : 0.140
Stream size                              : 14.8 GiB (95%)
Language                                 : English
Default                                  : Yes
Forced                                   : No
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

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MatteN · October 21, 2023 at 9:27 PM

You can only whitelist the resolutions your screen supports.

https://wiki.libreelec.tv/configuration/4k-hdr

limmes · October 22, 2023 at 12:04 AM

I checked Kodi logs and as I understand my TV supports these modes:

Code

2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 3840x2160 @ 60.000000 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 4096x2160 @ 30.000000 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 4096x2160 @ 29.970032 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 4096x2160 @ 25.000000 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 4096x2160 @ 24.000000 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 4096x2160 @ 23.976025 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 3840x2160 @ 59.940063 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 3840x2160 @ 50.000000 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 3840x2160 @ 30.000000 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 3840x2160 @ 29.970032 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 3840x2160 @ 25.000000 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 3840x2160 @ 24.000000 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 3840x2160 @ 23.976025 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 1920x1080 @ 60.000000 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 1920x1080 @ 59.940063 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 1920x1080i @ 60.000000 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 1920x1080i @ 59.940063 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 1920x1080 @ 50.000000 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 1920x1080i @ 50.000000 Hz
2023-10-21 21:13:05.715 T:1037     info <general>: Found resolution 1920x1080 with 1920x1080 @ 30.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1920x1080 with 1920x1080 @ 29.970032 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1920x1080 with 1920x1080 @ 25.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1920x1080 with 1920x1080 @ 24.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1920x1080 with 1920x1080 @ 23.976025 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1680x1050 with 1680x1050 @ 60.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1600x900 with 1600x900 @ 60.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1280x1024 with 1280x1024 @ 75.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1280x1024 with 1280x1024 @ 60.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1440x900 with 1440x900 @ 60.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1280x800 with 1280x800 @ 60.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1152x864 with 1152x864 @ 75.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1280x720 with 1280x720 @ 60.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1280x720 with 1280x720 @ 59.940063 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1280x720 with 1280x720 @ 50.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1024x768 with 1024x768 @ 75.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1024x768 with 1024x768 @ 70.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 1024x768 with 1024x768 @ 60.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 832x624 with 832x624 @ 74.925079 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 800x600 with 800x600 @ 75.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 800x600 with 800x600 @ 72.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 800x600 with 800x600 @ 60.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 720x576 with 720x576 @ 50.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 720x576 with 720x576i @ 50.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 720x480 with 720x480 @ 59.940063 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 720x480 with 720x480 @ 60.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 720x480 with 720x480i @ 59.940063 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 720x480 with 720x480i @ 60.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 640x480 with 640x480 @ 75.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 640x480 with 640x480 @ 73.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 640x480 with 640x480 @ 67.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 640x480 with 640x480 @ 60.000000 Hz
2023-10-21 21:13:05.716 T:1037     info <general>: Skipped 1 duplicate messages..
2023-10-21 21:13:05.716 T:1037     info <general>: Found resolution 720x400 with 720x400 @ 70.000000 Hz

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So you're saying that for 4K video with resolution out of list above screen resolution will always be set to 1920x1080 ?

**chewitt** · October 22, 2023 at 8:47 AM

Quote from limmes

So you're saying that for 4K video with resolution out of list above screen resolution will always be set to 1920x1080 ?

No, he's saying READ THE LINKED WIKI ARTICLE that explains how things work and how to configure Kodi.

pagi · January 6, 2024 at 3:06 PM

hello, I want to ask, I have a LG nanocell 4k and connected rpi 4 with LibreElec and I also have Hdmi 2.1 but in kodi in the settings I can't set in the white sheet set 4096x2160p 60.00hz why?

MatteN · January 6, 2024 at 8:19 PM

Do you have any files that need that resolution?

**chewitt** · January 8, 2024 at 8:56 AM

Quote from pagi

in kodi in the settings I can't set in the white sheet set 4096x2160p 60.00hz why?

You probably haven't forced the RPi4 to support 4K60 modes in config.txt. The 4K60 modes are not enabled in RPi4 firmware by default, and to MatteN point most users have no need for them (the only media I see "in the wild" above 4K30 is test media).

pagi · January 9, 2024 at 9:40 AM

Quote from chewitt

You probably haven't forced the RPi4 to support 4K60 modes in config.txt. The 4K60 modes are not enabled in RPi4 firmware by default, and to MatteN point most users have no need for them (the only media I see "in the wild" above 4K30 is test media).

I put hdmi_enable_4kp60=1 in config.txt, otherwise many movies are not in 4k 60 quality??

**chewitt** · January 9, 2024 at 12:02 PM

99.999% of 4K movies are 4K@23.976 or 4K@30 so 4K@60 modes are not normally required and they force the board to consume more power for no reason.

4K video 3824x1588 is downscaled to 1920x1080 (TV 4K capable)

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