I am new to Stunnel and I would like to know how to push my RTMP Milesight Camera stream to Stunnel and then push it to my RTMP stream site here:

rtmps://stream.mywebsite.com:1936/static/KI

I tried modifying the method that would push a stream to nginx, then Stunnel, then Facebook, but it doesn't work for me. May I know what steps I should take to push my RTMP Milesight stream to Stunnel? Would nginx be necessary for this?