Republishing a stream via RTMP to these services works like republishing to Youtube or Facebook. The following parameters should be set:
rtmp_transponder_full_url=true rtmp_transponder_stream_name_prefix= rtmp_flash_ver_subscriber=LNX 76.219.189.0 rtmp_transponder_send_metadata=true
Also, the port 443 should be strictly set when using RTMPS URL. For example, to republish a stream to a Telegram channel:
POST /rest-api/push/startup HTTP/1.1
User-Agent: curl/7.29.0
Host: localhost:8081
Accept: */*
Content-Type: application/json
{
"streamName": "test",
"rtmpUrl":"rtmps://dc4-1.rtmp.t.me:443/s/streamKey"
}