[mythtv-users] Two tuners showed up

Robert McNamara robert.mcnamara at gmail.com
Fri Aug 5 23:56:52 UTC 2011

On Fri, Aug 5, 2011 at 4:53 PM, Stephen Atkins <satkins at inetdesign.org> wrote:
> On 8/5/2011 5:30 PM, Robert McNamara wrote:
>> On Fri, Aug 5, 2011 at 4:25 PM, Stephen Atkins<satkins at inetdesign.org>  wrote:
>>> On 8/5/2011 5:24 PM, Nick Morrott wrote:
>>>> On 6 August 2011 00:19, Stephen Atkins<satkins at inetdesign.org>    wrote:
>>>>> I rebuilt my master backend.  Once the DB was restored from the original
>>>>> I deleted all capture cards (both local and on remote backends) since I
>>>>> switched cards to different versions.
>>>>> When I created the HVR-1600 which is on the master, it seems to have
>>>>> created two instances of it.  So cardid 17 and cardid 18 both point to
>>>>> the same device.  But when I manage the cards in the mythtv-setup it
>>>>> only shows one.  If I change something (like time to wait for a signal)
>>>>> it changes both of them in the database.  In MythWeb it shows both of
>>>>> them.  I'm just wondering what might happen if I manually delete #18?
>>>>> Is there any other tables that might need cleaning up after this?
>>>> Sounds like the expected behaviour when you have configured a digital
>>>> tuner with multirec set for 2 (the default if you don't explicitly
>>>> change the setting) concurrent recordings. Nothing to worry about.
>>>> Both "virtual" tuners share the same physical tuner, hence the reason
>>>> why changing tuning parameters affects all entries associated with the
>>>> physical tuner.
>>> Thanks for the quick response.  That's what it is.  Just need to turn
>>> off that second virtual card as the 1600 can't do two digital's at once.
>> You misunderstand.  Multirec means it can record multiple channels
>> from a single multiplex with a single digital tuner.  You don't want
>> to turn off the virtual tuners.  It might not do you a heck of a lot
>> of good depending on how the cable or broadcast is engineered where
>> you are, but it at least allows Myth's scheduler to record multiple
>> things at once with *just* the one digital tuner of the card if
>> multiple things you want to record happen to be on the same multiplex
>> at the same time.
> I'm sure I understand what he's getting at.  Some tuner cards can record
> multiple channels even from only one tuner.  I can't think of any cards
> that do this off the top of my head but I'm 99% (from all the docs I've
> read) that the HVR-1600 can't.  It does have an Analog and Digital tuner
> in it.  Those can be used at the same time but you can't do two digital
> or two analog at the same time.  So with that I should set the digital
> to only 1.
> Now if I'm wrong about this card let me know.  I'm only going by what
> I've read and understand from the wiki pages (both mythtv and linuxtv
> wiki's).

You are wrong about this card.  The digital side is fully multirec
capable, and always has been.


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