[mythtv-users] Automatic channel scans

[John Pilkington]

On 10/08/17 12:19, Mike Bibbings wrote:
> On 08/08/17 19:01, Jeff wrote:
>> It seems to me that there are changes to the channel line-up on Astra
>> something every couple of weeks. Mostly I don't notice until recordings
>> start failing, and then I don't have the necessary block of couple of
>> hours to do anything about it, and so I end up running mythtv-setup
>> perhaps every 18 months.
>>
>> Would it not be possible to achieve something like automatic channel
>> updates by having a job run, say once a week or once a month, which
>> performs a scan when the backend is not being used (e.g. in my case,
>> before it is shutdown), compares the results to the previous scan, and
>> then presents the differences to the user?
>>
>> e.g. 'New channel "XYZ" found on Input 1. Add/Ignore?'
>>       'Channel "XYZ" moved to frequency/sid/... Update?'
>>
>> Is this feasible?
>>
>> Does anyone else think this is a good idea?
>>
>> Regards
>>
>> Jeff
>>
> Yes, it is a good idea and is probably feasible with some changes to 
> mythtv.
> 
> mythtv-setup already has the capability to perform an automated scan and 
> either apply immediately  or save it for later use, see 
> https://www.mythtv.org/wiki/Command_Line_Channel_Scanner
> However, as far as I can tell this automated scan does not work for 
> DVB-S/S2, hence changes to mythtv.
> 
> I was thinking of something along the lines of comparing current channel 
> setup with automated last scan and just identify something has changed, 
> the user would then use mythtv-setup manually, to either rescan existing 
> transports (with search for new transports selected) or import the 
> automated scan results.
> 
> Mike

That wiki page lists a lot of DB tables which don't appear here

https://code.mythtv.org/doxygen/group__db__schema.html

I tried  [mythconverg]> describe dvbt-ofdm-uk ;

and got an SQL syntax error.  mythtvsetup --help doesn't show anything I 
can identify with it.  Does it exist?   I did try to use a saved scan 
once, with DVB-T, but got nothing useful.  The scan hadn't been made 
with this tool, though.

John