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Local Channel Number

Added by Hanspeter Müller almost 11 years ago

Hi all,

am i correct that "Local Channel Number" should be filled in from the network provider? My provider, UPC, does this, but it only works on their Settop-Boxes, and some of the newer TVs from Phillips and Samsung, on tvheadend the Local Channel Number is always 0. I would assume, they don't do it the right way, they are pretty notorious for doing everything a bit different.

Is there an equivalent of a wireshark for dvb to analyse a mux-stream, so i can try to find the right field that they are using, or should i simply upload a muxdump to the thread from Adam and hope for the best ;)?


Replies (4)

RE: Local Channel Number - Added by Adam Sutton almost 11 years ago

At this stage hoping for the best would probably not get you very far, I'm swamped!

It's possible that they're not using the standard DVB fields. You can try debugging using TVH, "--debug sdt --trace sdt -l tvh.log" is probably what you need and then you'll have to sift through all the crap in the log ;)

Adam

RE: Local Channel Number - Added by Hanspeter Müller almost 11 years ago

Hi Adam,

thanks for your answer, i really didn't want to offload more work onto you, that's why i've asked how to analyze this ;). The output from --trace is completely unreadable to me, are you actually able to "see patterns (beautifull-mind-glowing-numbers-popping-out-style)" in that hex-dump, or do you have tools to analyse these logs?

I searched a bit around; is http://dvbsnoop.sourceforge.net/ something that should be usable? I ran a mux throug it, it showed some information, but i don't think it was complete...

If im able (and at the moment that seems to be a big if) to find the right field, is this something that you could easily integrate, or would it require a hack? I think UPC must be using some sort of standard (as some TV can read it), but if it would require adding special workarounds for every little cable-network, it's probably not worth the hassle...

/hanspeter

RE: Local Channel Number - Added by Adam Sutton almost 11 years ago

Mostly its just a case of looking at each of the tags in the relevant sections, so you're probably looking under each service in SDT. Ruling out the standard ones, anything that's clearly unlikely (too long/too short). Also worth looking in BAT, I think that's actually where some UK stuff is. Also worth just reading around and finding someone else that's already solved the problem ;)

If you can find the relevant tags and how to process them it shouldn't be a big deal to include it.

Adam

RE: Local Channel Number - Added by Hanspeter Müller almost 11 years ago

Adam Sutton wrote:

Also worth just reading around and finding someone else that's already solved the problem ;)

Tried that, didn't find anything, UPC isn't exactly forthcoming with any documentation that goes beyond "rent our settopbox"...

If you can find the relevant tags and how to process them it shouldn't be a big deal to include it.

Great, i'll try to dig throug the dumps over christmas, let's see if i can find anything usefull...

/hanspeter

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