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

[R. G. Newbury]

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



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