[mythtv-users] using EIT for broadcast guide data

[Klaas de Waal]

On Mon, 25 Jul 2022 at 20:56, James Abernathy <jfabernathy at gmail.com> wrote:

>
>
> On Mon, Jul 25, 2022 at 2:46 PM Klaas de Waal <klaas.de.waal at gmail.com>
> wrote:
>
>>
>>
>> On Mon, 25 Jul 2022 at 20:07, James Abernathy <jfabernathy at gmail.com>
>> wrote:
>>
>>> I'm not sure of the proper way to configure this.  I created 2 tuners,
>>> both HDHR ATSC 1.0. I do not have the setting for constant EIT checked. My
>>> understanding is if this is checked it locks the tuner even though the
>>> tuner is not in use.
>>>
>>> All other EIT settings are default.  What I notice is if I view the
>>> Program Guide and there is no data, I can hit enter and it will go to that
>>> channel for Live TV.  If I stop that I now have guide data for about 12
>>> hours for that block of channels, i.e. 5_1, 5_2, and 5_3.
>>>
>>> However, if I don't tune to that channel again, I get no more EPG data.
>>> I have mythfilldatabase set to run via systemd timer/service, but it skips
>>> the source since it's EIT.
>>>
>>> Bottom line: how do you get EIT data updated 2-3 times a day without
>>> having to tune to the channel?
>>>
>>> JIm A
>>>
>>>
>> The usual way of configuring EIT is like this:
>> - one video source, EIT is selected
>> - two capture cards (for a two-channel HDHomeRun)
>> - both capture cards connected to the same video source
>> - the first capture card is configured for  active EIT
>>
>> This will keep one capture card busy all the time; it will go through all
>> channels and find all available EIT information.
>> As soon as this capture card is needed for a recording (or for live TV)
>> the EIT scan is stopped so both capture cards
>> are still available. But yes, your system will be somewhat busy when
>> collecting EIT.
>>
>> When you do not configure a capture card for active EIT then EIT will be
>> collected by the first capture card when it is recording.
>> It will then capture whatever is present on the transport stream
>> multiplex of the selected channel but it could be that this is just for a
>> few channels, not for all channels that you can receive.
>>
>> For the details about having to use the first capture card of a HDHomeRun
>> for EIT, see also
>> https://www.mythtv.org/wiki/Channel_Scanning#EIT_program_guide_information
>> .
>>
>> Hope this helps,
>> Klaas.
>>
>> Great explanation. Thanks.  I did read the wiki, but I couldn't relate to
> my HDHR at the time.
>
> So if I have a 2 tuner HDHR configured with only one active scanner
> checked, I don't lose the ability to record on both.  Does that also apply
> for another smart TV with the HDHR app from seeing that tuner with the
> active scan as available for use?
>
> Jim A
>
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So if I have a 2 tuner HDHR configured with only one active scanner
> checked, I don't lose the ability to record on both.


Correct.

Does that also apply for another smart TV with the HDHR app from seeing
> that tuner with the active scan as available for use?


No, active EIT by MythTV does allocate one (the first) tuner for MythTV.
When MythTV wants to make a recording it does start with that tuner. The
other tuner is still available for use by the smart TV, unless MythTV
is making recordings on both tuners.

Klaas.
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