I know this has been asked before. Obviously, RTMP isn't being updated by Adobe. There are a total of 15 possible codec IDs in FLV/RTMP. Only 7 are assigned. Why doesn't the OBS and librtmp team get together and just say "lets make #8 HEVC"? Then any ingest server which wants to support HEVC must understand #8. It can then be formalized in an IETF draft.