[mythtv] Analogue finetuning change between v0.18 and v0.19

Andrew M. Bishop amb at gedanken.demon.co.uk
Tue Feb 21 17:50:00 UTC 2006

"Michael T. Dean" <mtdean at thirdcontact.com> writes:

> On 02/19/2006 12:34 PM, Andrew M. Bishop wrote:
> > In version 0.19 of MythTV the meaning of the finetune entry in the
> > channel table has changed to be different from that in version 0.18
> > and earlier.  More likely is that this is a bug since the original
> > meaning of the finetune value was to be the same as xawtv which is
> > also the finest tuning granularity that is available.
> http://svn.mythtv.org/trac/changeset/7092
> due to http://svn.mythtv.org/trac/ticket/232
> And 1000/16 is the minimum tuning resolution of the kernel's tuner
> module (62.5kHz)--so, where before you specified an arbitrary number
> having to do with the implementation in the driver (i.e. change by 12
> units), you now specify a value in kHz (i.e 750kHz).  Therefore, you are
> not losing (or even changing) fine tuning granularity--just using a
> different unit.

OK, there is an explanation and this is the expected (new) behaviour.

The problem is that there is no automatic change of the database
entries during an upgrade and no note about this change in database
format in any file that I could find in the source distribution.

Now we have an answer it means that anybody else who loses sound or
gets poor picture quality on analogue tuner cards after upgrading to
v0.19 can search the mailing list and find this message which might
solve it.

Andrew M. Bishop                             amb at gedanken.demon.co.uk

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