[mythtv] Channel scan produces bogus transponder data

Stuart Auchterlonie stuarta at squashedfrog.net
Wed Nov 15 15:10:44 UTC 2006


On Wed, Nov 15, 2006 at 08:25:56AM +0100, Tino Keitel wrote:
> 
> From my database:
> 
> 10 1 775 8468 714000000 0 NULL NULL NULL qpsk 8 auto a auto 0 auto n auto dvb 7 2006-09-26 20:44:59
> 
> Janne Grunau's transponder entry:
> 
> 10 1 775 8468 714000000 a NULL NULL NULL NULL 8 1/2 8 1/8 0 qam_16 n 2/3 dvb 7 2006-09-26 20:44:59
> 
> 
> 11 1 775 8468 714000000 0 0 auto v auto 8 auto a auto 0 auto n auto dvb 7 2006-11-15 07:52:49
> 
> Could somebody give me some insights regarding this?

At a bare minimum the result from rescanning is wrong. there should
not be a polarity on a dvb-t multiplex.

> 
> 1. Why did the old dtv_multiplex entry stopped to work somewhere after
>    11619?
> 
> 2. Why does my entry look so much different compared with Jannes?
>    Shouldn't thy look the same? He said that he also used the channel scan
>    for this.

A lot of this is dependent on your card and drivers.
Some cards can lock onto mux happily given just the frequency,
sometimes they need more information given.

AUTO|auto means that the driver should just try to work it out
itself, so using Janne's more specific information obviously
let the card lock better.

> 
> 3. Why does the new entry contains different, but still broken data?
> 

That is an interesting question. I'd like to see the output from
mythtv-setup --verbose channel,record,siparser
when scanning for the channels....

Stuart



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