Live stream from Publishing point as source to Encoder

[George]

I have regular stream that I need to encode to given multibitrate profile and than restream it to another publishing point . Is it possible to use publishing point as source ? I tried to do following but it gave me error . "It was not possible to find valid source plug-in for specified source."

IWMEncSourceGroup SrcGrp = SrcGrpColl.Add("SG_1");
SrcGrp.Source = WMENC_SOURCE_TYPE.
IWMEncSource SrcAud = SrcGrp.AddSource(WMENC_SOURCE_TYPE.WMENC_AUDIO);
IWMEncSource SrcVid = SrcGrp.AddSource(WMENC_SOURCE_TYPE.WMENC_VIDEO);
SrcAud.SetInput("http://xyz.com/", "", "pubPoint");
SrcVid.SetInput("http://xyz.com/", "", "pubPoint");