[mythtv-users] Tuning to DVB channel without transmisson

[Ian Barton]

Ian Barton wrote:
> 
>>>>>  Our MythTV (0.21-fixes) seems to freeze with a black screen when 
>>>>> trying
>>> to
>>>>>  tune to a DVB channel wothout transmission.
>>>>>
>>>>>  This happens regularly here as we have childrens channels that stop
>>>>>  transmitting at 18:00 and starts again in the morning. If the last
>>> channel my
>>>>>  children watched was one of these and I continue watching later in 
>>>>> the
>>> evening
>>>>>  I am had.
>>>>>
>>>>>  The only way I have been able to get out of this is editing the
>>> mythconverg
>>>>>  database by hand.
>>>>>
>>>>>  Is there any easier workaround or do I have something wrong in my
>>> setup?
>>>> Do you have 'Interactive TV' [1] enabled? If you do, and the channel
>>>> displays an off-air broadcast message, you should be able to choose
>>>> another channel normally if you tune to the channel whilst it is not
>>>> broadcasting.
>>>>
>>>> [1] configured in mythfrontend TV setup
>>>>
>>>  This doesn't seem to work for me. I can see the off air message, but 
>>> the
>>> channel won't retune. I would like to solve it if possible as having to
>>> select a different tuner significantly impacts WAF.
>>
>> Which channels don't work?
>>
>> I've just tried this for BBC Three BBC Four (which are currently
>> off-air until 1900) and Virgin ! +1 (back on at 1800) and got the
>> off-air placeholder text (saying e.g. "BBC Three is available from
>> 7.00pm daily..." and could use the OSD browser or direct channel
>> number entry to change to another channel. These are the only 3
>> channels on UK DVB-T that I might tune to in LiveTV.
>>
>> I guess success depends on the particular broadcaster and whether they
>> provide MHEG data/graphics to permit "tuning" to an off-air channel,
>> but since the introduction of the MHEG interactive TV browsing I don't
>> seem to have gotten stuck on these channels before.
>>
> 
> None of them work for me - BBC4, CBBC, Virgin 1, Yesterday. I can see 
> the off air place holder, but whatever method I use to change channel 
> fails. I'll try tuning up the logging level tonight and see what happens 
> in the morning.
> 
> I often record things from BBC4 in the evening and the children watch 
> BBC, so when Anne tries to watch the news in the morning she often gets 
>  a tuner which is "stuck". Even trying to change the channel to another 
> one on the same multiplex fails.
> 
> I have thee different tuners - I'll try to remember to see if it's one 
> particular one that gets stuck.
> 

Did some experiments this morning. Tuner stuck on BBC4. trying to change 
channel by entering a number had no effect - I was still stuck with the 
Off Air message. However, using the Up/Down arrow keys to cycle the 
channels did work, although I am sure it didn't before:)

Ian.