Mailing List Archive: MythTV: Users

multirec works but the scheduler never uses it for consecutive recordings

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ryan.goat at gmail

Nov 24, 2009, 6:08 AM

Post #1 of 9 (959 views)
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multirec works but the scheduler never uses it for consecutive recordings

I have two ATSC/QAM HDhomerun boxes set up to use multirec. One tunes
ATSC OTA off an antenna (real tuners 11 & 13 virtual tuners 12 &14)
and the other HDHR tunes clear QAM from my cable service (real tuners
16 & 18 virtual tuners 17 & 19). I know multirec is working. If I
schedule recordings at the same time from channel 44-1 & 44-2 myth
correctly uses tuners 11 & 12. I have successfully recorded eight
shows at once (as a test). So I know all real and virtual tuners
work.

Also I will point out I have myth set to start recordings five minuets
early and end recordings five minuets late. But when I have back to
back recordings scheduled on the same channel Myth always uses one
tuner for both recordings. For example on FOX Sundays I record the
Simpsons, the Cleavland Show, Family Guy and American Dad. Myth
always uses tuner 11 to record all four shows. This means I don't get
the extra five minuets before or after. Myth could use tuners 12, 13
& 14 to record these back to back shows but instead the other tuners
sit idle every week.

Why doesn't myth use my other tuners?

_____________
Ryan Patterson
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linux at thehobsons

Nov 24, 2009, 6:55 AM

Post #2 of 9 (915 views)
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Re: multirec works but the scheduler never uses it for consecutive recordings [In reply to]

ryan patterson wrote:

>Myth could use tuners 12, 13
>& 14 to record these back to back shows but instead the other tuners
>sit idle every week.
>
>Why doesn't myth use my other tuners?

It's just the way the scheduler works - discussed on here a few months ago.

You can set a hard extension to recordings (down near the bottom of
the recording rule options), but then you will not get back-back
recordings when they are neccessary.

--
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.
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steve.p.daniels at googlemail

Nov 24, 2009, 7:53 AM

Post #3 of 9 (922 views)
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Re: multirec works but the scheduler never uses it for consecutive recordings [In reply to]

2009/11/24 ryan patterson <ryan.goat [at] gmail>:
> I have two ATSC/QAM HDhomerun boxes set up to use multirec. One tunes
> ATSC OTA off an antenna (real tuners 11 & 13 virtual tuners 12 &14)
> and the other HDHR tunes clear QAM from my cable service (real tuners
> 16 & 18 virtual tuners 17 & 19). I know multirec is working. If I
> schedule recordings at the same time from channel 44-1 & 44-2 myth
> correctly uses tuners 11 & 12. I have successfully recorded eight
> shows at once (as a test). So I know all real and virtual tuners
> work.
>
> Also I will point out I have myth set to start recordings five minuets
> early and end recordings five minuets late. But when I have back to
> back recordings scheduled on the same channel Myth always uses one
> tuner for both recordings. For example on FOX Sundays I record the
> Simpsons, the Cleavland Show, Family Guy and American Dad. Myth
> always uses tuner 11 to record all four shows. This means I don't get
> the extra five minuets before or after. Myth could use tuners 12, 13
> & 14 to record these back to back shows but instead the other tuners
> sit idle every week.
>
> Why doesn't myth use my other tuners?
>

Hi Ryan,

This has been discussed a million and one times. What queries did you
try when searching the list?

http://www.gossamer-threads.com/lists/mythtv/users/

Ste Daniels
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ryan.goat at gmail

Nov 24, 2009, 8:38 AM

Post #4 of 9 (919 views)
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Re: multirec works but the scheduler never uses it for consecutive recordings [In reply to]

On Tue, Nov 24, 2009 at 10:53 AM, Ste Daniels
<steve.p.daniels [at] googlemail> wrote:
> 2009/11/24 ryan patterson <ryan.goat [at] gmail>:
>> I have two ATSC/QAM HDhomerun boxes set up to use multirec. One tunes
>> . . .
>> Why doesn't myth use my other tuners?
>>
>
> Hi Ryan,
>
> This has been discussed a million and one times. What queries did you
> try when searching the list?
>
> http://www.gossamer-threads.com/lists/mythtv/users/
>
> Ste Daniels

This topic has been discussed a million times you say? I've read this
list for years and I've never seen a message discussing what I am
asking about. I just did some searches of my list archive looking for
multirec and HDHR and nothing discussing the behavior I described came
up.

I did find several messages saying that myth will use the virtual
multirec tuners to record back to back recordings with extra time at
the beginning & end. This is also what the wiki says. But this is
not what I see happening on my system. That is why I posted my
question.

If this failure has truly been discussed a million times then please
shoot me a link to just one of the discussions so I may learn how to
fix the issue on my system. Maybe you are just much smarter and can
search better then me.

-Ryan
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ryan.goat at gmail

Nov 24, 2009, 8:51 AM

Post #5 of 9 (927 views)
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Re: multirec works but the scheduler never uses it for consecutive recordings [In reply to]

On Tue, Nov 24, 2009 at 9:55 AM, Simon Hobson <linux [at] thehobsons> wrote:
> ryan patterson wrote:
>
>> Myth could use tuners 12, 13
>> & 14 to record these back to back shows but instead the other tuners
>> sit idle every week.
>>
>> Why doesn't myth use my other tuners?
>
> It's just the way the scheduler works - discussed on here a few months ago.
>
> You can set a hard extension to recordings (down near the bottom of the
> recording rule options), but then you will not get back-back recordings when
> they are neccessary.

Thanks for the heads up. Changing the start recording early, end
recording late option in the individual recording schedule did in fact
cause myth to start using the idle tuners. I always assumed the
global early/late setting had the same effect as the early/late
setting on the individual schedules. Apparently not so though I don't
know why not.

-Ryan
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mythtv at mikeholden

Nov 24, 2009, 9:10 AM

Post #6 of 9 (925 views)
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Re: multirec works but the scheduler never uses it for consecutive recordings [In reply to]

ryan patterson wrote:
> On Tue, Nov 24, 2009 at 10:53 AM, Ste Daniels
> <steve.p.daniels [at] googlemail> wrote:
>> 2009/11/24 ryan patterson <ryan.goat [at] gmail>:
>>> I have two ATSC/QAM HDhomerun boxes set up to use multirec. One tunes
>>> . . .
>>> Why doesn't myth use my other tuners?
>>>
>>
>> Hi Ryan,
>>
>> This has been discussed a million and one times. What queries did you
>> try when searching the list?
>>
>> http://www.gossamer-threads.com/lists/mythtv/users/
>>
>> Ste Daniels
>
> This topic has been discussed a million times you say? I've read this
> list for years and I've never seen a message discussing what I am
> asking about. I just did some searches of my list archive looking for
> multirec and HDHR and nothing discussing the behavior I described came
> up.
>
> I did find several messages saying that myth will use the virtual
> multirec tuners to record back to back recordings with extra time at
> the beginning & end. This is also what the wiki says. But this is
> not what I see happening on my system. That is why I posted my
> question.
>
> If this failure has truly been discussed a million times then please
> shoot me a link to just one of the discussions so I may learn how to
> fix the issue on my system. Maybe you are just much smarter and can
> search better then me.

The 2 relevant phrases are "hard padding" and "soft padding". Of course, if you don't
know that, then you may struggle to search for them!

The short version is that hard padding (the pre-and post- minutes defined on an
individual program) will always be honoured (or a conflict occurs). Soft padding on the
other hand is more of a wishlist, and will be added where possible.

Searching for hard padding soft padding at the link posted above will indeed show the
topic has been discussed many times, but probably not a million and one! (I've told him
millions of times not to exaggerate, but he doesn't listen :-) )
--
Mike Holden

http://www.by-ang.com - the place to shop
for all manner of hand crafted items,
including Jewellery, Greetings Cards and Gifts

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linux at thehobsons

Nov 24, 2009, 9:10 AM

Post #7 of 9 (926 views)
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Re: multirec works but the scheduler never uses it for consecutive recordings [In reply to]

ryan patterson wrote:

>Thanks for the heads up. Changing the start recording early, end
>recording late option in the individual recording schedule did in fact
>cause myth to start using the idle tuners. I always assumed the
>global early/late setting had the same effect as the early/late
>setting on the individual schedules. Apparently not so though I don't
>know why not.

There is a global setting for hard padding, but it only applied to
NEW rules - existing rules retain the value in effect when they were
created. It is a separate setting to soft padding.

See this thread :
http://www.gossamer-threads.com/lists/mythtv/users/392492

--
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.
_______________________________________________
mythtv-users mailing list
mythtv-users [at] mythtv
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

ylee at pobox

Nov 24, 2009, 10:04 AM

Post #8 of 9 (915 views)
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Re: multirec works but the scheduler never uses it for consecutive recordings [In reply to]

ryan patterson <ryan.goat [at] gmail> says:
> I always assumed the global early/late setting had the same effect
> as the early/late setting on the individual schedules. Apparently
> not so though I don't know why not.

When I ran Bill Cizek's HDHomeRun multirec patch for 0.21
(subsequently incorporated into 0.22), the behavior you ask for was
available by also using his rework of another patch that provided
two-pass scheduling versus the stock scheduler's one-pass method.
(<URL:http://www.gossamer-threads.com/lists/mythtv/dev/370684#370684>)
Sadly, the patch does not apply to 0.22.

--
Frontend/backend: P4 3.0GHz, 1.5TB software RAID 5 array
Backend: Quad-core Xeon 1.6GHz, 6.6TB sw RAID 6
Video inputs: Four high-definition over FireWire/OTA
Accessories: 47" 1080p LCD, 5.1 digital, and MX-600
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mtdean at thirdcontact

Nov 24, 2009, 10:22 AM

Post #9 of 9 (909 views)
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Re: multirec works but the scheduler never uses it for consecutive recordings [In reply to]

On 11/24/2009 11:51 AM, ryan patterson wrote:
> On Tue, Nov 24, 2009 at 9:55 AM, Simon Hobson wrote:
>
>> ryan patterson wrote:
>>
>>> Myth could use tuners 12, 13
>>> & 14 to record these back to back shows but instead the other tuners
>>> sit idle every week.
>>>
>>> Why doesn't myth use my other tuners?
>>>
>> It's just the way the scheduler works - discussed on here a few months ago.
>>
>> You can set a hard extension to recordings (down near the bottom of the
>> recording rule options), but then you will not get back-back recordings when
>> they are neccessary.
>>
> Thanks for the heads up. Changing the start recording early, end
> recording late option in the individual recording schedule did in fact
> cause myth to start using the idle tuners. I always assumed the
> global early/late setting had the same effect as the early/late
> setting on the individual schedules. Apparently not so though I don't
> know why not.

Because it breaks things. :)

Nevertheless, those who don't care about breakage can use:

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.

And Section 12 of the HOWTO explains how scheduling works and why:
http://www.mythtv.org/docs/mythtv-HOWTO-12.html

Mike
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