Just sharing my config to send raspberry pi video to Herelink here
Using raspbian/raspberry pi os. You have to fix the output resolution to 1080p. Auto-detection won’t work.
cd boot
sudo nano config.txt
| Original | Modification |
|---|---|
| #disable_overscan=1 | disable_overscan=1 |
| #framebuffer_width=1280 | framebuffer_width=1920 |
| #framebuffer_height=720 | framebuffer_height=1080 |
| #hdmi_force_hotplug=1 | hdmi_force_hotplug=1 |
| #hdmi_group=1 | hdmi_group=1 |
| #hdmi_mode=1 | hdmi_mode=34 |
| #hdmi_drive=2 | hdmi_drive=2 |
| https://www.raspberrypi.org/documentation/configuration/config-txt/video.md |
It doesn’t matter whether you are using cli version or desktop version. Herelink will be the screen of raspberry pi. You get what it displays.