Download clip from rstp url

Hi,

I have a rstp url like this: rtsp://192.168.1.91:554/Streaming/tracks/101?starttime=20240906T213000Z&endtime=20240906T213100Z (to call using username and pw).

I need to download the resulting videoclip as a file (es. mp4) in a local folder on HA.

I was thinking to something similar a shell command, as I do with curl command to save images with Get Rest APIs (toward my Hikvision NVR).

How can I do this?