[mythtv-users] Issue with Multirec and DVB-S?

Nick Morrott knowledgejunkie at gmail.com
Tue Nov 3 03:16:25 UTC 2009

2009/11/1 Ben Lancaster <mail at benlancaster.co.uk>:
> Hi there,
> I'm currently recording something on an HVR-4000 hybrid card using the DVB-S
> tuner on ITV HD. When I launched Live TV, it started on BBC HD. I thought
> this was a little strange as I only have a single DVB-S tuner, and didn't
> realise that ITV HD or BBC HD were on the same multiplex (if DVB-S even has
> multiplexes?), so I'd have expected MythTV to switch to one of the DVB-T

BBC HD and ITV HD are actually on different satellites (Astra 2D and
Eurobird 1, respectively).

> tuners on another card. I flicked around a few other DVB-S channels and
> noticed that they were all playing fine. So, I went in to my recordings and
> started watching the DVB-S recording on ITV HD to find that the recording
> stopped working at around the point I'd switched to Live TV - mythbackend
> still says it's recording ITV HD (and it's still flagged as "currently
> recording" in Watch Recordings) but it's impossible to play past the point
> that I started watching Live TV, and the total time counter doesn't
> increase. None of my other tuners were active at the time, only the DVB-S
> one.

I think this may be an input group misconfiguration, but you'll need
an HVR-4000 user to give a definitive answer that this works.

The HVR-4000 cannot use DVB-S and DVB-T simultaneously, and this
restriction means that both the DVB-T and DVB-S inputs need to be
configured appropriately to stop MythTV from trying to use them both
at the same time. I don't have this card, but am guessing that
assigning them to the same input group would work.

An additional restriction when using multirec (much more useful on
DVB-T than DVB-S) is that each multirec-enabled card's inputs need to
be assigned to the same input group (this happens automatically if you
choose >1 recordings in capture card setup).

Whether the appropriate 'fix' is to assign *all* of the configured
card inputs on the HVR-4000 to the same input group (allowing the
scheduler or LiveTV session to handle inputs appropriately) is not for
me to say, but I'd give it a go :)


Nick Morrott

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