Mirrors come and go. Check https://docs.armbian.com/Mirrors/#current-mirrors for an up to date list of active mirrors and its status.

I don't know. I don't maintain this board. Perhaps the maintainer knows which is alexl83. I don't know if he has a forums account though. Try via Github

Hi @Werner For your info, with kernel-6.19.5-edge-rockchip64 using dtb from kernel-7.0.0-rc5/rc6-edge-rockchip64, Headphone Jack audio/sound is available. Does this mean the device tree is not the culprit and it is related to the kernel? Have not tried not tried booting up kernel-6.18.10-current-rockchip64 with device tree from kernel-6.18.20-current-rockchip64.

What happened to https://mirror.aarnet.edu.au/pub/armbian/ ? It's showing an empty directory. https://mirrors.lahansons.com/armbian/apt/ proxy via Cloudflare so may be a suitable alternative.

I'm using Ubuntu 24.04 noble armbian distribution, the branch I used for ffmpeg is https://code.ffmpeg.org/Kwiboo/FFmpeg/src/branch/v4l2request-v3 The ffmpeg included in the distribution does not matter, but regardless it is version 6.1.1. The mpv is built against the locally compiled ffmpeg with libplacebo from https://code.videolan.org/videolan/libplacebo.git