I think its called a "Stream Custom Unique Reference".

I have an IPTV "wget command" for Enigma2 Stream Service which provides 7300 IPTV +3000 VOD streamed channels Worldwide, so its worth for me get this issue sorted out.
Now my Family and I can enjoy the programs with EPG, picon and choose our preferred Audio channels.

What I have managed to do is to use the "Stream Custom Unique Reference" from my Sat TV Channels in my Settings List that I can receive on my Box via Sat.
ie..Astra 19°E - Hotbird 13°E - Astra 28°E and Thor 1°W.

Then take the "E-Channelizer" Editor and and look at the Tutorials, this..
http://echannelizer.com/guide/how-to-assign-epg-picon/
is a great Tutorial, how to Read and Load the "Stream Custom Unique Reference" from the Sat TV channels and apply this to the same IPTV channel in your settings.

This will then give you ALL the EPG info, picon and Audio choice from the Sat Tv channel, so when you tune into the same IPTV channel, EPG, picon and Audio can be viewed...NOT all the IPTV channels allow you to change the Audio to a different or alternative language but many do.!

But this method ONLY gives you the IPTV EPG, picon and Audio from Sat TV Channels you actually have in your Settings List, NOT the ones you DO NOT receive via your Sat Dish.!
So you have to be on that particular Sat and have the TV channel loaded into your Bouquets Settings to see the same IPTV EPG, picon and Audio infos...but this does work really well.!

Unfortunately I DO NOT have ALL the same Sat TV Channels via my Motorised Dish, as ALL IPTV channels loaded.
Many IPTV Streams are out of View for my Motorised Sat Dish.
I can only Scan Sats from 66°E <<>> 45°W.
So most IPTV are without EPG, picon or the possibility to change Audio, with this method it works for both EPG, picon and Audio.!

I will keep on searching and if I find more or better ways of doing Info I will post.OK
Thanks

PS, Admin If posting links like this one above is NOT permitted, please feel free to delete it...OK