You have 3 options to record a live stream on the nimble server
with the new dvr function on the wmspanel to a local path say: /var/cache/nimble/recording/live1/
It wil record the live stream in many litle small video files.
or record a live stream to a singel mp4 file with ffmpeg as a task in "server-side-task-controle" in the wmspanel like:
ffmpeg -re -i rtmp://ip-nimble-server/live/live1 -c copy "/mnt/samba-share/vod/live1.mp4"
samba-share is nice when you share a folder on a shared storage, like a nas.
but if you have enough space on the local disk of the nimble server, you can record on the local storage of nimble too
But you have to install ffmpeg first on the nimble server or use ffmpeg on a different pc is an option too.
A live encoder such as "Flash media live encoder" for live streamingm, can record direct to a f4v file. You convert a f4v video to mp4, later on with handbrake or ffmpeg, or many other programs
option 3 is the easiest way to start with.
option 2 with ffmpeg is what I use the most.
you can use % for variable output with ffmpeg.
/vod/`date +%V_%d-%m-%Y_%H.%M`_1.mp4"