[mythtv-users] dvb signal statistics?

[Janne Grunau]

On Tuesday 07 November 2006 17:49, Andrew Lyon wrote:
> On 11/7/06, Daniel Kristjansson <danielk at cuymedia.net> wrote:
> >
> > It apparently caused too many I2C messages for the DVB drivers
> > to continue to deliver video reliably. We need a half dozen
> > hacks just to get some of the DVB drivers to tune to a channel,
> > so there is no way we'll be enabling signal stats anytime soon.
> >
> > Some of the DVB devs are aware of the I2C problems so the
> > drivers may get fixed some day. When they are, MythTV could
> > easily be modified to monitor the signal continuously.
> 
> Perhaps the functionality that is going to be merged into budget_ci
> and others soon for doing i2c using irq might help with that?

The saa7146 cards are not really a problem and were it even without 
interupt I2C not.
Some cards use bit-banging I2C which takes significant time (10ms each 
call) see http://svn.mythtv.org/trac/ticket/2099 for reference.

Bu I'm not sure if it is useful feature at all. The values will differ 
between different cards. You can identify a broken recording only with 
some experience in "good" and "bad" values for your card. The only 
working way to recognize a broken recording is to actually view it.

Janne