[vdr] Dynamic PIDs

Klaus Schmidinger Klaus.Schmidinger at tvdr.de
Tue Nov 24 22:40:57 CET 2009


On 24.11.2009 22:38, Anssi Hannula wrote:
> Klaus Schmidinger wrote:
>> On 24.11.2009 19:22, Anssi Hannula wrote:
>>> Klaus Schmidinger wrote:
>>>> On 24.11.2009 18:28, Jouni Karvo wrote:
>>>>> Jouni Karvo kirjoitti:
>>>>>> Rolf Ahrenberg kirjoitti:
>>>>>>   
>>>>>>> On Mon, 23 Nov 2009, Jouni Karvo wrote:
>>>>>>>
>>>>>>>     
>>>>>>>> is there somewhere a patch that would remove the break when the
>>>>>>>> broadcaster uses "dynamic pids" (such as YLE).  Now, when a programme
>>>>>>>> starts at YLE, they change the Audio PID number, leading to VDR
>>>>>>>> re-tuning or something, that leads to a 1-2s break in the show. There is
>>>>>>>> no change in frequency, so I don't see any reason why there is such a
>>>>>>>> break.
>>>>>>>>       
>>>>>>> As a quick fix just disable the pid updates ("Channel update: no/names
>>>>>>> only"). Yle is always using the same pid numbers although they're
>>>>>>> switching them on and off, so you can easily fix these numbers in your
>>>>>>> channel.conf.
>>>>>>>     
>>>>>>   
>>>>> Tried this, but it seems it loses the subtitling PIDs.  Is there a way
>>>>> to get both - subtitling and non-breaking TV viewing?
>>>> It might be interesting to learn why they do this "PID cycling"
>>>> in the first place. Have you ever tried contacting them and asking
>>>> why they do such a stupid thing?
>>> Different programmes have a different number of languages, so the number
>>> of active pids changes. Isn't that correct behaviour?
>> Sure, but why "cycle" them through various values, and not use the same
>> ones for the same languages?
> 
> As far as I can see they keep them the same, and VDR retunes just
> because the number of tracks changes.
> 
>> As long as the PID switch takes place outside a show, that's of course ok.
>> Switching them *inside* a show is IMHO not a good idea.
> 
> The change of active PIDs takes place when a show begins, causing 1-2s
> of stream to go missing due to the retune as Jouni described in the
> initial post.

It sure wouldn't hurt if they changed the PIDs a little earlier.
Other channels do that.

Klaus



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