[mythtv] [mythtv-commits] Ticket #12342: Add support for DVB-T2 for tuners that do not auto-switch

John Pilkington J.Pilk at tesco.net
Sat Oct 3 14:12:48 UTC 2015


On 30/09/15 17:45, MythTV wrote:
> #12342: Add support for DVB-T2 for tuners that do not auto-switch
> -----------------------------------+-----------------------------
>   Reporter:  David Matthews <dm@…>  |          Owner:  stuarta
>       Type:  Patch - Feature        |         Status:  assigned
>   Priority:  minor                  |      Milestone:  0.28
> Component:  MythTV - DVB           |        Version:  Master Head
>   Severity:  medium                 |     Resolution:
>   Keywords:                         |  Ticket locked:  0
> -----------------------------------+-----------------------------
>
> Comment (by David Matthews <dm@…>):
>
>   In [changeset:"02f2d5e7abd522eb5195548513b58a5f7bb6c209/mythtv"]:
>   {{{
>   #!CommitTicketReference repository="mythtv"
>   revision="02f2d5e7abd522eb5195548513b58a5f7bb6c209"
>   Support for DVB-T2 in the channel scanner.  When used with a card that
>   supports DVB-T2
>   it adds the ability to select DVB-T/T2 when editing a transport and
>   extends the full
>   scan to check whether a frequency will lock with DVB-T2.  It only tests
>   for DVB-T2 if it
>   has failed to lock with DVB-T to avoid having duplicate entries with cards
>   that auto-switch
>   between DVB-T and DVB-T2.  It also fixes a bug where previously if a lock
>   was obtained
>   with an offset frequency but not with the centre frequency the entry in
>   the database
>   contained only the centre frequency.
>
>   (cherry picked from commit 2bfbbf39cc5819bd8767baa1586d98e53abd15a2)
>   Signed-off-by: Stuart Auchterlonie <stuarta at squashedfrog.net>
>
>   Conflicts:
>           mythtv/libs/libmythtv/cardutil.h
>           mythtv/libs/libmythtv/channelscan/channelscan_sm.cpp
>
>   Refs #12342
>   }}}
>
> --
> Ticket URL: <https://code.mythtv.org/trac/ticket/12342#comment:9>

I have a PCTV-290e, which has used an auto-switching driver but TTBOMK 
is no longer marketed.  I wanted to see if this commit would affect it.

After installing the *buntu ppa build I deleted and re-enabled the 290e 
'capture card' and rescanned for channels using my usual 'all known 
transports+' option.  The scan went fine, but T2 channels did not record 
until I had manually inserted the T2 option via the transport editor.

I then deleted all transports and did a full scan.  Recordings worked, 
but all the qam-type entries were left as AUTO and the frequency offsets 
reported were not all as expected.  In the hope of getting greater 
robustness I have edited-in the 'correct' values.

I get usable signals from only one transmitter, and the laptop used has 
no other capture device.






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