[mythtv] How does mythtv decide which backend does the recording?

Chris Pinkham cpinkham at bc2va.org
Tue Jul 22 17:45:54 EDT 2003


If you're still running into disk space issues running current CVS
with auto-expire turned on then we'll look forward to your patch
which fixes whatever bug is causing this.  I hope that is not hard
to implement.  Thanks.

> I ran into the low disk space issue again today.  There were two
> programs scheduled for recording at current time.  When I try to go to
> the Watch Recording Screen in the main backend, I cannot get there.  Its
> just a black screen.  When I deleted some files via the console, then I
> could get into the Watch Recording Screen and it shows those two
> programs currently recording.  I think the expected behavior should be
> that I could go into Watch Recording screen no matter what and that the
> recordings scheduled are just dumped if there are no available encoders
> in any backends.  In this case,since I have three tv cards, (one on the
> slave backend), I should see at least one recording in progress in Watch
> Recording Screen.  I would prefer that at least one of my main backend
> tv cards try to encode a to the slave backend storage.  Its a
> suggestion, I hope that is not hard to implement.   Thanks.  
> 
> 
> On Mon, 2003-07-21 at 07:59, Zaheer Abbas Merali wrote:
> > On Mon, 2003-07-21 at 13:28, Joel Melohn wrote:
> > > The minimum free space checking sounds like a good enhancement.
> > > 
> > > Is there any way to use capture card hardware characteristics, such as
> > > stereo vs. mono, to determine which backend is used to do the recording?
> > > That way, a cheaper capture card could be used to record programs for which
> > > you do not care about having stereo and you could insure that the stereo
> > > capture card was used for programs such as a music video etc.
> > > 
> > > This would probably need a user provided parameter when the program is
> > > scheduled. (possibly mono, stereo, or don't care, with a user configurable
> > > default).
> > 
> > What would be better is a ranking system for this.  If a channel can be
> > recorded on more than one free capture card, it should pick the highest
> > ranked capture card rather than the first available.  Of course, if the
> > available capture cards all have the same ranking then it should act as
> > it currently does.  So for example, if there is a DVB card and an
> > analogue card.  I would rank the DVB card higher than the analog card,
> > as it does not require encoding and provides a better quality picture
> > and ,much better quality sound.
> > 
> > Deciding on one particular attribute such as stereo vs mono, IMHO is not
> > flexible.  IMHO, the ranking setting should by default be the same
> > number for all capture cards and in the mythsetup program's capture card
> > or inputsource section there should be an option to set the rankin of
> > the source.  Everyone is going to have different criteria for deciding
> > which source is best for them, so the ranking system would leave it very
> > flexible.  Its also a nice paradigm for users and one they can
> > understand.
> > 
> > If there is support for this idea, I will write a patch to implement
> > this.
> > 
> > Take Care
> 
> 
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-- 

Chris



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