// nc.isConnected:false
// nc.isConnected:true
onStatus update
level: status
code: NetStream.Play.Start

onStatus update
level: status
code: NetStream.Buffer.Full

onStatus update
level: status
code: NetStream.Buffer.Flush

onStatus update
level: status
code: NetStream.Play.Stop

onStatus update
level: status
code: NetStream.Buffer.Empty

