[mythtv] Looking for developers familiar with channel scanning and diseqc code

belcampo belcampo at zonnet.nl
Sat Jul 4 08:46:27 UTC 2009

Peter Brouwer wrote:
> Hello
> I am looking for developers who can help me understand the bigger 
> picture of the channels scanning and diseqc code for DVB receivers.
> So far it seems quite complex. What I would like to to is add 
> functionality to import the so called satellite.xml file. This file 
> contains a schema listing the known frequencies for the specified 
> satellites in the file. The file is commonly used by DVB satellite 
> receivers running on some form of embedded Linux.
> There are various tools around that generate an satellite.xml file from 
> well know sat web pages like lynsat or kingofsats.
> Those tools make it very easy to keep on up to date list of known 
> frequencies of sats of your choice.
> So being able to import such a file in myth would make the whole channel 
> scanning process much easier.
> I also am having problems getting myth to use my rotor using the Usals 
> config option.  mythtv-setup works fine, it positins the rotor to the 
> correct sat when channel for channels . Zapping channels via the 
> frontend does not work, i.e. the rotor always stays at the position I 
> lastly used during a channels scan fom mythtv-setup.
> The logic and implementation seems hideous complex. Needing to define a 
> source for each new sat in the setup phase.
> So I am looking for some help and guidance to understand this  
> functionality/architecture and code implementation in myth , before 
> starting to make changes in it.
Would also love to have this solved, if VDR, Kaffeine, w_scan and 
scan-s2/szap-s2 can do it, reliable switch channels from different 
sattelites, I think mythtv should be able to do the same, but I'm not a 
coder, so can't be of any help.
> Regards
> Peter
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