RTMP playback is dying. You can change your structure to LL-DASH&HLS or WebRTC. Most of techs will remove RTMP/Flash end of 2020. It's time to change your structure.
I use HLS and WebRTC for display.
The only other exciting injest I've seen recently was Mixer's (now defunct) UDP FTL.
Do you have a sense for a more compelling ingest than RTMP/RTPMS at the moment?