public override void BendAvTransportUri(System.String _uri, System.String _uriMetadata)
{
//avTransport.SyncSetPlayMode(1, "TRANSITIONING");
//avTransport.BeginBendAVTransportURI(0, _uri, _uriMetadata, null);
avTransport.SyncBendAVTransportURI(0, _uri, _uriMetadata);
}