What stream URL are you using? stream.mpg as a generic video URL?
pick your channel from the guide right click and copy link from watch now button and use that as a generic url.
example: http://dvr-dvr:8089/devices/ANY/channels/6003/hls this will vary to match your setup
as in this example: http://xxxxx:8089/devices/ANY/channels/xxxx/hls
Hope this helps.