[mythtv-commits] Ticket #13449: Channel Scan fails when no delivery system has been selected

[MythTV]

#13449: Channel Scan fails when no delivery system has been selected
---------------------------------------+---------------------------------
     Reporter:  Klaas de Waal          |      Owner:  Klaas de Waal
         Type:  Bug Report - General   |     Status:  assigned
     Priority:  minor                  |  Milestone:  31.0
    Component:  MythTV - Mythtv-setup  |    Version:  Master Head
     Severity:  medium                 |   Keywords:  DVB delivery system
Ticket locked:  0                      |
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 A mythtv-setup Channel Scan with a DVB tuner card that does not have a
 delivery system selected fails with a "Failed to open card" message in the
 "Scan Type" selection field. In the log output the following message
 appears:

 {{{
 2019-04-17 21:12:42.500642 E  CardUtil[1]: No delivery system selected for
 capturecard 1

 }}}

 This typically happens when mythtv-setup is run with a v30 database; for
 DVB cards field capturecard/inputname is then set to "DVBInput" which is
 not a delivery system such as "DVB-T2".

 This problem is avoided by selecting first a delivery system, with "2.
 Capture Cards" /  <select capture card> /  <select card type> / "Delivery
 system". However, this is not obvious for even the experts, let alone the
 casual users.

 The way forward is to implement the following for DVB cards:
 - if there is no valid delivery system then
   - get the current delivery system from the device
   - if that is DVB-T and DVB-T2 is supported then change to DVB-T2
   - if that is DVB-S and DVB-S2 is supported then change to DVB-S2
   - update the database with the new delivery system

 N.B. In mythbackend it is already done like this, but without modifying
 the database. This allows a mythbackend compiled from master to run with a
 v30 database.

-- 
Ticket URL: <https://code.mythtv.org/trac/ticket/13449>
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