[mythtv-users] Scheduler seems to think I am recording too many programs at once

[John Pilkington]

On 02/05/13 05:56, Stephen Worthington wrote:
> I was just checking the scheduling for the new EPG received today, and
> I found that one program "Seven Sharp" was not recording at its usual
> time of 19:00 on TV ONE, but instead was recording at 20:00 from the
> TVONE PLUS1 channel which retransmits TV ONE an hour later, but in SD
> instead of HD.  I have occasionally seen this sort of thing happen
> before, always when I am recording lots of programs at the same time.
> It has always seemed to me that the scheduler must have some limit for
> the number of programs it will record at one time and when it goes
> over that limit, it tries to reschedule one or more of them.  If I add
> an override to force "Seven Sharp" to record from TV ONE at 19:00, the
> scheduler is happy to do that and does not seem to make any other
> changes.
>
> Here is the schedule for that time period, without the override:
> [Time]       [Callsign]-[Program name]
> 17:30:18:30  DISCO - Mythbusters
> 18:00-19:03  TV ONE - One News At 6pm
> 18:00-19:03  TV3 - 3 News
> 18:30-19:03  ChoiceTV - Bath Crashers
> 19:00-19:33  TV ONE - Seven Sharp  (yellow, "Find Daily -3 Later
> Showing")
> 19:00-19:33  TV ONE-S - Seven Sharp (yellow, "Find Daily -7 Later
> Showing")
> 19:00-19:33  TV3 - Campbell Live
> 19:30-19:33  TV2 - Police Ten 7
> 19:30-20:30  HISCH - Mysteries At The Museum (yellow, "Channel Record
> +0 Later Showing")
> 19:30-20:30  KNOWLGE - Who Do You Think You Are? Aus
> 19:30-20:33  PRIME - Great Rift: Africas Wild
> 19:30-20:33  TV3 - Grand Designs Revisited
> 20:00-20:30  CRIME& - Traffic Blues (yellow "Channel Record +0 Later
> Showing")
> 20:00-20:33  TV2 - RBT
> 20:00-20:33  TVONE PLUS1 - Seven Sharp
> 20:29-21:33  TV3 - Bones
>
> In the above, TV ONE, TV2 and TVONE PLUS1 are transmitted on the same
> DVB-T multiplex, PRIME and ChoiceTV are on the same DVB-T mux, and TV3
> is on the third DVB-T mux.  TV ONE-S is an SD version of TV ONE on a
> DVB-S mux.  The other channels are all on Sky TV which is recorded
> from a set top box via one S-Video card (so there is only one tuner
> for those channels).  The three DVB-T muxes are on one source, the
> DVB-S muxes on another source, and Sky TV is on the third source.  All
> the DVB-T and DVB-S tuners are set up with 4 multirec virtual tuners
> each, and I have 3 DVB-T tuners and 2 DVB-S ones.  Since I have as
> many DVB-T tuners as there are DVB-T muxes being transmitted, I should
> never have to use the TVONE PLUS1 channel at all as I should always
> have enough tuners to record everything I need on the first showing.
>
> So, does anyone know if there is some sort of limit in the scheduler
> on the number of programs that will record at any one time?  And if
> so, what it is and how it works?  Is there a setting I can adjust for
> it?
>
> I have 5 recording drives, so whatever is causing this sort of
> rescheduling is not taking that into account, as I can easily record
> at least 10 programs simultaneously, and probably more, as long as the
> recordings use all the drives (and they normally do).
>
> Also, is there a way to mark the TVONE PLUS1 channel as SD and the TV
> ONE channel as HD and tell the scheduler to always record the HD
> programming unless there is an actual clash?

It's easy to reach the limit on a single mux, especially with pre and 
post roll.  I think the default limit in 0.26-fixes is 5 virtual tuners; 
you say you are using 4.  I haven't examined your schedule in depth, but 
if all your muxes are in use there's nowhere else to go.