public User(string sUsr, string sIP, Socket sck)
{
string[] stmp = sIP.Split(':');
_bHearBeat = true;
_sUserName = sUsr;
_sIP = stmp[0];
_iPort = Convert.ToInt32(stmp[1]);
_iepCmd = new IPEndPoint(IPAddress.Parse(_sIP), _iPort);
_sck = sck;
_iepVideo = null;
_iepAudio = null;
_iepConvVideo = null;
_iepConvAudio = null;
}