[mythtv-users] No Guide data from EIT on SOME channels

Paul Catchpole paul at paulcatchpole.co.uk
Sun Jan 13 14:29:58 UTC 2008

Jonno wrote:
> On Jan 12, 2008 9:52 PM, Jonno <jonnojohnson at gmail.com> wrote:
>> On Jan 11, 2008 11:33 AM, Jonno <jonnojohnson at gmail.com> wrote:
>>> On Jan 11, 2008 11:24 AM, Phil Bridges <gravityhammer at gmail.com> wrote:
>>>> On Jan 11, 2008 12:12 PM, Jonno <jonnojohnson at gmail.com> wrote:
>>>>> On Jan 11, 2008 9:13 AM, Jonno <jonnojohnson at gmail.com> wrote:
>>>>>> I am using EIT data for my program guide and I can only see program
>>>>>> information for 3 of the 6 channels I receive.
>>>>>> I saw this Tip in the EIT wiki:
>>>>>> Tip: In the U.S. some digital stations may not appear in the program
>>>>>> guide even though they are broadcasting program information. This may
>>>>>> be due to a "hidden guide" bit that is transmitted by the stations. To
>>>>>> see if this is the case run mythbackend with the --verbose
>>>>>> important,general,eit option. After some time passes check the output
>>>>>> or check /var/log/mythtv/mythbackend.log for "is hidden in guide"
>>>>>> output. One way to get the data to be included in the EPG is to "hack"
>>>>>> the atscstreamdata.cpp file in libmythtv/mpeg/. Delete the code below
>>>>>> from atscstreamdata.cpp and then reinstall mythtv from source.
>>>>>> So before I go hacking anything, what exactly does "reinstall mythtv
>>>>>> from source" mean? I installed Mythbuntu from a LiveCD.
>>>>> Ok I went into the Channel Editor in Mythtv-Setup and found that the
>>>>> channels with no guide data from EIT did NOT have the box checked to
>>>>> "Use On-Air Guide", (I had never gone into the channel editor during
>>>>> initial install). So I went through and enabled this for all channels.
>>>>> I also changed the Channel Names to something more intuitive like NBC.
>>>>> I then exited mythtv-setup and ran mythfilldatabase when prompted. I
>>>>> then went back to Watch Live TV and took a look at the guide but still
>>>>> no program info for those channels! What is interesting is that the
>>>>> channel names have also not changed to what I typed (either in the
>>>>> Guide or the OSD).
>>>>> Something did not carry through from mythtv-setup to the frontend as I
>>>>> expected. Any ideas?
>>>>> I also tried restarting the backend with the options described above
>>>>> and took a look at the backend but there is no mention of "hidden" in
>>>>> the log. There are lines like this for 2 of the 3 channels where I do
>>>>> get guide info:
>>>>> 2008-01-11 09:59:02.889 EITScanner: Now looking for EIT data on
>>>>> multiplex of channel 54_1
>>>> Try to refresh today's database: mythfilldatabase --refresh-today
>>> No change. Do you think it's possible there simply is no data being
>>> broadcast? Surely my new channel names should appear in the
>>> mythfrontend though.
>> Ok I did manage to change the guide setup so at least I can see that
>> the channel names have been updated. However I still don't have
>> schedule data for those channels. Is there somewhere I can read up on
>> how and where Mythbuntu reads, stores and accesses that guide data so
>> I can try to figure out if it's actually getting to my system or not?
> I was thinking of trying this tip from the Wiki:
> _______________________________________________
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Running the backend with -v siparser,eit will provide debug info as the 
EITscanner scans each multiplex.

That might give you some insight.

There's an EITCache table in the database too, but I'm no expert on 
this, so that might not help you.


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