[mythtv-users] Help wanted with mixed SD/HD Setup (DVB-S, Astra 19.2°)

[Another Sillyname]

2010/1/24 R. G. Newbury <newbury at mandamus.org>:
> On 01/24/2010 06:40 AM, Matthias Thyroff wrote:
>>
>> Hello All,
>>
>> being right in the process of reconfiguring my 0.22 myth system from
>> scratch, I am not sure how to handle the channel setup for my mixed
>> SD/HD setup, I hope you can set me on the right track:
>>
>> Setup:
>> Myth Backend (Ubuntu 9.10, mythbuntu repositories for 0.22-fixes weekly
>> builds)
>> with 1x Technisat DVB-S SD receiver and 1x Hauppauge DVB-S2 HD receiver,
>> both pointing to Astra 19.2°E.
>> Video Source: EPGDATA commercial service (XMLTV).
>>
>> I have configured EPGDATA as source 1. I have linked both cards to this
>> source.
>
> Yes, this approach is wrong. You match cards to sources, where any card on
> the source can tune ALL of the channels from that source. Your cards cannot
> do that.
> You need to set up 2 sources even though they are pointed at the same actual
> transmitter. One source for SD, and one source for HD. That way the
> Hauppuage tuner is the only one which gets presented with HD channels.
>
>> If I scan the channels with the DVB-S2 card, it will find a lot of SD
>> channels and some HD channels.
>>
>> All the found channels then are available for tuning for both cards, of
>> course this fails if I try to do that with the SD-only card.
>>
>> I would not like to set up two video sources (one SD only, one SD and
>> HD) because downloading two times ... most importantly, does not seem to
>> be the right way (I could name technical reasons, too.)
>
> It is actually the correct way. If the HD receiver can also receive the SD
> channels, then it will be a larger list of channels. If not you will have 2
> mutually distinct channel lists.
>
>> I have tried to set up one additional video source for the few HD
>> channels only and limit the source to EIT data, that would be acceptable
>> for now (German HD channels aren't reproduced properly anyway in the
>> actual 0.22-fixes version from the mythbuntu repo), but I can't find a
>> way to attach two video sources to one card.
>
> That is not possible, due to the constraint that a tuner attached to a
> source must be able to tune all of the channels in that source.
>
>> Basically, what I would need is the possibility to exclude a number of
>> channels from being tuned with one of my cards. Is that possible? Maybe
>> my approach is all wrong?
>
> You will have to set up 2 lineups. It should not be that hard with XMLTV.
> The overall download should not be that any larger being split into 2
> chunks. Only if the HD receiver also gets the SD channels, AND your xmltv
> program does NOT cache data, would the download be any bigger. The xmltv
> program used by mythtv for Schedules Direct caches data for re-use. Your
> version probably does too.
>
> Geoff
>
>
>
> --
>        Please let me know if anything I say offends you.
>         I may wish to offend you again in the future.
>
>         Tux says: "Be regular. Eat cron flakes."
>
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>

Also be aware that sometimes your cards will load in different order
unless you force the load order.  It's to do with how quickly the
firmware loads into a card and then that card gets presented to the
kernel sooner.  Hot reboot and Cold Reboot affects the firmware
loading time.