Multiple streams over a singel connection

How hard would this be to modify a bit to support multiple streams over a single connection? I've been looking for a relay like this, but haven't found one that can ingest multiple inputs from separate connections, and push them out to remote locations, but all over a single connection with each remote location. Everything I've been able to find creates a new connection for each stream.

The issue does not identify files, tests, or entry points. First determine how the RTMP relay currently maps input streams to connections and whether multiplexing multiple streams over one connection is supported; done would mean separate inputs reach each remote location over a shared connection without breaking existing single-stream behavior.

Written by the indexing model from the issue text.