michelehokuto commented 2 days ago

Morning, I'm new to this project. I would like to record on the HDMI input port but I saw that the device /dev/video0 does not exist.

Reading I understood that it was disabled by default: https://github.com/armbian/linux-rockchip/pull/173 https://github.com/Joshua-Riek/ubuntu-rockchip/issues/758

I tried adding an overlay to enable it but it doesn't work, here are the things I tried:

add overlay on file: /etc/default/u-boot

/etc/default/u-boot - configuration file for u-boot-update(8)+

U_BOOT_UPDATE="true"

U_BOOT_ALTERNATIVES="default recovery"

U_BOOT_DEFAULT="l0"

U_BOOT_PROMPT="1"

U_BOOT_ENTRIES="all"

U_BOOT_MENU_LABEL="Debian GNU/Linux"

U_BOOT_PARAMETERS="ro earlycon"

U_BOOT_ROOT=""

U_BOOT_TIMEOUT="50"

U_BOOT_FDT=""

U_BOOT_FDT_DIR="/lib/firmware/"

U_BOOT_FDT_OVERLAYS="device-tree/rockchip/overlay/rk3588-hdmirx.dtbo"

U_BOOT_FDT_OVERLAYS_DIR="/lib/firmware/"

U_BOOT_SYNC_DTBS="false"

update u-boot configuration

sudo u-boot-update

P: Checking for EXTLINUX directory... found. P: Writing config for vmlinuz-6.1.0-1017-rockchip... P: Writing config for vmlinuz-6.1.0-1016-rockchip...

check extlinux.conf cat /boot/extlinux/extlinux.conf | grep hdmi result: 'hdmi' there isn't in the file

I also checked if the /dev/video0 device exists after reboot but it doesn't.

What should I do? Thank you

N.B. I also updated the whole system, the kernel is: `uname -a

Linux orange-desktop 6.1.0-1017-rockchip #17-Ubuntu SMP Sun Jun 23 19:14:56 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux `

Joshua-Riek commented 2 days ago

You need to uncomment U_BOOT_FDT_OVERLAYS, remove the "#".

< #U_BOOT_FDT_OVERLAYS="device-tree/rockchip/overlay/rk3588-hdmirx.dtbo"
---
> U_BOOT_FDT_OVERLAYS="device-tree/rockchip/overlay/rk3588-hdmirx.dtbo"

michelehokuto commented 19 hours ago

sorry for late, now it work. Device /dev/video0 exist, but I still can't record on obs, nothing comes out on the screen. I followed the instructions in this video, I installed obs-studio and obs-gstreamer but it doesn't work, any advice? https://www.youtube.com/watch?v=i_L0mGepOtI

Joshua-Riek commented 19 hours ago

OBS can not record from HDMI input, this is a problem with the BSP kernel from Rockchip.

Please see https://github.com/Joshua-Riek/ubuntu-rockchip/issues/830

michelehokuto commented 19 hours ago

yes, I was reading the issue. It seems like it works on obs, maybe I'm wrong #830 , I'm not an expert in the field. My goal is to record 1920x1080 60fps, is there an easy way to do this? I'll tag @MaximKurakin too, maybe he can give me a hand given his experience. Thank you

Joshua-Riek commented 19 hours ago

Using gstreamer via a command line, the below issue has some useful info:

https://github.com/Joshua-Riek/ubuntu-rockchip/issues/252#issuecomment-1629302255

michelehokuto commented 16 hours ago

with gstreamer it works, but the frame rate is low. This is the command: gst-launch-1.0 v4l2src device=/dev/video0 io-mode=4 ! videoconvert ! video/x-raw,format=NV12,width=1920,height=1080,framerate=30/1 ! videoscale ! video/x-raw,width=1280,height=720 ! autovideosink sync=false 2>&1 > /dev/null

Joshua-Riek commented 16 hours ago

Your limiting the frame rate it looks like, you should read the documentation and look at how other users are capturing input on RK3588 devices.