[mythtv-users] duplicate callsigns? (was: Re: utterley confused)

James Linder jam at tigger.ws
Tue Jun 24 02:09:46 UTC 2014


On 23 Jun 2014, at 9:15 pm, Vincent McIntyre <vincent.mcintyre at gmail.com> wrote:

> On 6/23/14, James Linder <jam at tigger.ws> wrote:
>> 
>> Here is a sequence that shows this bizare behaviour:
>> 
>> 16:59
>> 1 program scheduled to record
>> http://tigger.ws/myth1.png
>> 
>> 17:01
>> It has started to record
>> http://tigger.ws/myth2.png
>> 
>> 17:03
>> The second instance has started. It reports start time as 16:58 but really
>> it is 17:02 ish
>> http://tigger.ws/myth3.png
>> 
>> I can’t make sense of this. It is a new DB. Anybody help please …
>> 
> 
> This may be sending you down the wrong track here so I've tweaked the
> subject line...
> I have noticed that some Australian broadcasters send out more than
> one program stream in their multiplex that has the exact same
> callsign. I am not sure how mythtv copes with this.
> 
> If you want to check whether this is happening in your case, here is
> what I would try.
> Stop the mythtv-backend, and do a scan with 'w_scan -f t -c AU -X -a 0'.
> it will spit out a bunch of detailed channel information. The reason
> for using w_scan
> is that I find it simpler to see the raw detail of what is being
> transmitted than the myth channel editor.
> 
> Here is what I get for the channel 10 multiplex in Sydney (on 219500000 Hz)
> (I took out a few spaces in the first field to keep the long lines together).
> 
> ONE(TENSydney):219500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_NONE:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:514:672:1569
> TENDigital(TENSydney):219500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_NONE:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:512:650:1573
> TVSN(TENSydney):219500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_NONE:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:518:690:1574
> ONE(TENSydney):219500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_NONE:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:514:672:1575
> ELEVEN(TENSydney):219500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_NONE:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:516:681:1576
> SpreeTV(TENSydney):219500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_NONE:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:520:700:1577
> 
> It's not obvious to me (without additional information from other
> sources) whether the duplicate callsign indicates exactly the same
> content in the program stream - the programid field (the last one I
> think, w_scan's output needs better documentation) is different.
> 
> Hope this helps a bit

SuSE does not have a w_scan so while I look around …

Your explanation makes perfect sense. I recorded 4 corners and Q&A last night (a different channel). Both recorded only a single program.
I’ve set my GP duiplicates to None (10 don’t bother to differenciate between qualifing and the race (at least sometimes)) and a single GP was recorded last night (ie after the main event they transmit it again.

Now I need to figure out if they just started to do this or if something on my side changed. It did not happen before (my recent scans show ONE TEN-Digital ELEVEN. I’m sure I had more before, but my scan pretty much matches what you’ve got.

James



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