[mythtv-users] 3 Mux but recording schedule indicating using 4 tuners?

David Engel david at istwok.net
Tue Sep 20 00:55:43 UTC 2011

I was too busy to participate in this thread earlier.  I think most of
the issues were covered adequately, but there are a couple of things I
want to add.

On Sat, Sep 17, 2011 at 11:03:37AM -0400, Ronald Frazier wrote:
> Unfortunately, myth doesn't have the ability to prefer a tuner that's
> already tuned to the same multiplex. Multirec is a relatively new

I've considered doing this in the past.  I don't have the time nor
motivation to work on it now, but if someone else wants to take a stab
at it, I'd be happy to review it.

On Sun, Sep 18, 2011 at 08:26:12AM +0100, Simon Hobson wrote:
> One thought that comes to mind ...
> If you only have 3 muxes, then you could dedicate one tuner to each 
> mux. I'm not sure of the steps required to do this (I only have one 
> tuner, and 5 SD muxes) but I think you'd configure an input on tuner 
> 1 and only create channels that are on mux 1; then you'd create tuner 
> 2 and only add channels from mux 2 to it, and ditto for mux 3.
> That way, unless you exceed the number of virtual tuners, the 
> scheduler will always pick one of those three tuners - ie the lowest 
> number/highest priority tuner for any channel will be one of these 
> three tuners, and one of them will always be tuned (or available to 
> be tuned) to the mux required.
> Then you'd add your fourth tuner, add all the channels to it, and it 
> should always be available for live-TV.

Unless a multiplex-affinity patch is created, I think this is a good
idea for the OP.

Another idea, if priorities aren't needed for other uses, is to set
channel priorities based on multiplexes.  For example, set the channel
priority for channels on mux 1 to 1, on mux 2 to 2 and on mux 3 to 3.
If all other priorites are 0 and there are no conflicts, that should
cause all of the programs on mux 3 to be scheduled first and fill up
physical card 1.  The programs on mux 2 would be scheduled next and 
use physical card 1 if possible and then fall back to card 2 as needed.
That should leave card 3 unused for programs on mux1 if they can't be
scheduled on the other cards.

David Engel
david at istwok.net

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