[mythtv-users] Back to back recording issues, and musical sound cards.

[Jim Beckett]

Jim Beckett wrote:
> Michael T. Dean wrote:
>> On 01/15/2010 03:06 PM, Allen Edwards wrote:
>>   
>>> Someone will probably chime in here who has a better memory than I do
>>> but basically the first show probably wants to record and extra 5
>>> minutes and the second one wants to start 1 min early so they
>>> conflict.  I think there is a setting to tell myth to go ahead and
>>> ignore these guard bands for back to back same channel recordings.
>>>  Not sure you said same channel.  Anyway, I can't remember.  As
>>> an alternative, you can set the guard bands to zero. I believe there
>>> are two guard bands so don't let one being 0 confuse you.  There is a
>>> standard default one and an override one.  But, I could be completely
>>> wrong...
>>>     
>>
>> I think the setting you're thinking of is:
>>
>> Avoid back to back recordings from different channels
>> If set, the scheduler will avoid assigning shows from different channels
>> to the same card if their end time and start time match. This will be
>> allowed when necessary in order to resolve conflicts.
>>
>> There's no setting to tell Myth to ignore the start early and end late
>> specified in a recording rule--as that's something the rule tells the
>> scheduler is mandatory.  The only thing you can do when that causes a
>> conflict is to create a recording override.
>>
>> Mike
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>>
>>   
>
> Allen, Michael,
>
> Thanks for the clarification there. I don't think that I have "Avoid 
> back to back recordings from different channels" set (I can't seem to 
> locate it). Just to clarify, the back-to-back recording instances that 
> failed were both for the same channel, and I did not have any program 
> start/end time overrides set for either show.
>
> I can't seem to reproduce the issue at the moment, I think that I'll 
> just have to wait, and see if it fails again.
>
> If I do run into this issue again, what settings for the various logs 
> would be most useful?
>
> I was thinking mythbackend --setverbose 
> general,record,channel,schedule,xmltv  might be good. Would there be a 
> better way to diagnose the problem if it does come up again?
>
> Thanks for your insight.
>
>
>
>
I found Allen's post in January 2009, here: 
http://www.mailinglistarchive.com/html/mythtv-users@mythtv.org/2009-01/msg03193.html

If I understand correctly, the issue is that there is some sort of 
command coming over the television transmission telling mythtv to extend 
the recording time on a show, or start another show earlier, that is 
overriding the program information set by the schedules direct grabber, 
and causing the conflict?

If that's correct, (I didn't know that was possible...) I would want to 
have my tuners set to record more than one stream per multiplex, and 
this issue should go away, right? I've been attempting to find out if my 
A180 cards are capable of this, and haven't found anything that I would 
consider an authoritative answer about it. I know that when I previously 
had the setting at 2, my system showed 4 capture card inputs, and I 
didn't think that sounded right, so I pulled it back to 1 recording each.

If I am misunderstanding the situation, then how does one tell MythTV to 
just honor the recording times set by the EPG from schedules direct, and 
end the recording at the specified time, and start the next one? If I 
miss the tail end of a show, then I suppose that I can futz around with 
the start early/end late settings for the recording rules, until I am 
satisfied.

Sorry for being such a noob, but a lot of this is pure Greek to me.

Yours Truly,

-Confusious Maximus
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