[mythtv-users] Force mythtv to always use one input for a particular channel

[Michael T. Dean]

On 10/18/2012 02:36 AM, Karl Dietz wrote:
> On 18.10.2012 05:56, Tom Hayward wrote:
>> On Wed, Oct 17, 2012 at 8:41 PM, Mary Strimel  wrote:
>>> Is there a way to make mythtv do this? Should I try to create two
>>> different channel lineups, one of which omits that channel, the other
>>> which only has that channel?  Or is there some easier way?
>>> Thanks in advance,
>>> Mary
>>
>> I think this will work the way you want: Create two channel lineups,
>> one for each tuner.

OK, just to get terminology straight...

Lineup = a list of channels from a specific provider that you specifiy 
at Schedules Direct, and for which you can download listings data

Video Source = a list of channels and their tuning information in MythTV

What the OP needs is 2 MythTV Video Sources, which can both use the same 
Schedules Direct lineup.

>> Make sure the callsigns match so the scheduler
>> knows they are the same content. On the lineup for Tuner1, increase
>> the channel priority of the very strong channel (favor strong channel
>> on Tuner1), but decrease the input priority for Tuner1.

No, you shouldn't increase the priority of the channel on the Video 
Source connected to the tuner you want to use that channel.  In so 
doing, you would be saying, "I'd rather record garbage off this channel 
than record something good off any other channel," so you would actually 
be messing up your other recording schedules (even those for shows that 
never air on this channel).

You would /only/ want to decrease the priority of the channel on the 
Video Source connected to the tuner you don't want to record that 
channel--which says, "I'd rather miss a recording on this channel, but 
if there's no other option, a recording from this channel will work."

(This is exactly why messing with channel and input priorities is almost 
always a bad idea--because few understand the results of doing so.  It 
all comes down to the fact that there is only one priority which affects 
/what/ you record.  It's never as simple as affecting where you record.)

>> Now the
>> scheduler will favor Tuner0 for all but the one strong channel.
>
> I'm assuming you're on 0.25 or 0.26...
>
> I would stay away from the priorities. Just use two video sources, one
> per antenna. And configure them to just contain the channels that you
> can receive without error. (it's all digital after all)
> Look at callsign and channel number so it matches if its the same
> channel.
> If you like, configure the input order to be "big antenna first,
> rabbit ears later". See 
> http://www.mythtv.org/wiki/Release_Notes_-_0.25#Scheduler
> The scheduler will shuffle stuff around to make room for recordings
> that can only be recorded on one input either way.

This is definitely the easiest way--and likely is more what the OP 
wants.  By creating a Video Source without the troublesome channel, you 
would be making it impossible to record off that channel on the input 
using that Video Source.  The other input--which uses the other Video 
Source, that contains the channel--would be able to record off that channel.

Mike