FFMPEG Configuration File Example

Hi, Could somebody please help point me the right direction please. I have a NVR with 6 x external hardwired cameras and I would like to stream live video to a dashboard. I have Motioneye installed and that works well but it also hits the limited resources on my HA hardware , hence looking for an alternative method to achieve the same. At present with motion Eye I am using RTSP commands to pull in the stream from each camera . Where i need help is to understand how I do this and what do I need to add to the Configuration.yaml

Does anyone have any config examples for similar please

Many thanks Andy