Channel format

[satdown]

I am just trying to write my first autohotkey program.

I am processing channels.dat and comparing it against area/regional channel information(Logical channel numbers) from EPG Collector, eventually I hope to update the channels.dat with changed information according to LCNs, I have a few small problems with the channels.dat format.

I downloaded DVBViewer_File_Structures.zip from the customer area, the channels.dat format doesn't seem to be up to date :- Orbital position is marked as reserved 5 in channels.dat documentation, language is marked as reserved 7 and 8.

 

When exporting a channel list via the channel editor I can't work out the positions or settings for the of following fields : lnbselection, epgflag, volume, audiochannel and substreamid.

 

I am attempting to process all the channels for a particular root which I have called called "Astra 28.2 E", this seems to work fairly well except that a few channels have a root of "Astra 28.2 E" followed by bel(hex 07) then "d (ben)", the string "d (ben)" appears to come from a channel name "Sky News Active iText Quad (ben)” note this name is exactly 26 characters in length which is the maximum name size, a few other channels seem to have a similar problem when their channel name is 26 characters. I can work round this using substrings – but it does seem to be a problem.

 

Could someone also let me know how I recognise a channel as compared to a subchannel where nid,sid and tid are the same, currently I am looking at audio pid and if I find a duplicate, I am assuming it is a new channel.

 

[satdown]

Just realised that the hex characters 07 etc in name and root mean that the end of the root should be appended to the name

[satdown]

Found the subchannel (audio) flag, in the flags byte, I should now be able to swap channels so that my preferred language is always the first channel i.e. "eng" rather than "NAR"