Answer for addStreamAlias localStreamName is invalid
OK I got an email reply which informed that hypens and underscores are ok (but spaces not ok apparently) and also telling that I need to encode the parameters in base64.
var params = 'localStreamName='+[LOCALSTREAMNAME]+' aliasName='+[ALIASNAME];
paramsEncoded = new Buffer(params).toString('base64');
var url = 'http://[YOUR EMS IP]:7777/addStreamAlias?params='+paramsEncoded;
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