Like Alan said there are much better alternatives out there for creating an RTMP stream. OBS as mentioned, but then I stumbled across this while playing with Nginx and restreaming:
…and there are a ton of examples of folks piping that output to and rtmp stream Via FFMpeg or avconv hosted on Twitch or YouTubeLive or Vimeo. I tried a few and YouTube’s latency seemed to be the best with Vimeo be abysmal and Twitch being fine but god awfully presented.
Ultimately a little Lenovo M90n with a decent processor costs less than 600 bucks, another 150 for an nvme capture card and you can run all the software required to stream more or less for free.
I do wish Autodesk would take a cue from FilmLight and add an rtmp stream as a possible output so we can skip this silly loop from SDI to capture to stream.