[mythtv] schema for manually adding channels

Michael T. Dean mtdean at thirdcontact.com
Thu Jan 14 14:04:19 UTC 2016


On 01/14/2016 08:12 AM, Matt Zagrabelny wrote:
> Hi Mike,
>
> Thanks for the reply!
>
> On Thu, Jan 14, 2016 at 6:39 AM, Michael T. Dean
> <mtdean at thirdcontact.com> wrote:
>> On 01/13/2016 05:37 PM, Matt Zagrabelny wrote:
>>> Greetings,
>>>
>>> I've grepped the -dev archives and didn't find an answer to the question
>>> of:
>>>
>>> What tables do I need to add records to in order to manually add an
>>> ATSC DTV channel?
>>>
>>> It looks like: channel and dtv_multiplex. Any other tables?
>>>
>>> I have a channels.conf file that works with mplayer:
>>>
>>> 3.1:587000000:8VSB:49:52:1
>>> 3.2:587000000:8VSB:65:68:2
>>> 6.1:503000000:8VSB:49:52:1
>>> 6.2:503000000:8VSB:65:68:2
>>> 8.1:183000000:8VSB:49:52:1
>>> 8.2:183000000:8VSB:65:68:2
>>> 8.3:183000000:8VSB:81:84:3
>>> 8.4:183000000:8VSB:97:100:4
>>> 10.1:195000000:8VSB:49:52:3
>>> 10.2:195000000:8VSB:81:84:5
>>> 21.1:491000000:8VSB:49:52:3
>>>
>>> Any hints about manually adding channels will be much appreciated.
>>>
>>> Thanks!
>>
>> Digital channels, especially, really need to be scanned using mythtv-setup's
>> channel scanner.  We don't support importing channels.conf anymore because
>> there are many formats used by different channels.conf files and--more
>> importantly--channels.conf doesn't contain all the information MythTV needs
>> for its channels.
>>
>> So, why not just scan with MythTV's channel scanner?
> Using the scan for channels feature of mythtv-setup doesn't find the
> channels. Originally after installing Myth, the scan didn't find *any*
> channels - that was a few weeks/months ago. I just reran the scan
> about a week ago and it found *one* channel - with four subchannels:
> 8.1 - 8.4.
>
> The issue doesn't seem to be unique to myth either. I have run a
> separate scan utility:
>
> w_scan -A1 -X -c US -fa -t3
>
> and it doesn't find all the channels, but it did find more than the
> myth scan did.
>
> I have a friend who lives on the other side of town and his w_scan
> found all the channels. I've used that channels.conf file with mplayer
> and verified that all of the channels in it "work".
>
> Any ideas of where to proceed from here?
>
> Thanks for the help!

Sounds like poor signal issues coupled with too-short tuning and/or 
signal timeouts.  Try increasing (possibly significantly--like to the 
maximum allowed) the "Signal timeout (ms)" and "Tuning timeout (ms)" in 
Capture Card setup, then "Delete all Video Sources", then reconfigure 
your video sources and redo your channel scan.

Mike


More information about the mythtv-dev mailing list