[FFmpeg-user] Timestamp output filename?

[DopeLabs]

using the following to record a live stream:

ffmpeg -i rtmp://domain.com/url/to/stream -shortest -c:v copy -c:a copy -f mp4 /home/user/directory/archive.mp4

but trying to find a way to add a timestamp to the output filename... the time being 'now', or the time when the command was executed.

any ideas?

cheers =]