[mythtv] [PATCH] Big audio update redux

[J. Donavan Stanley]

Ed Wildgoose wrote:

>
>> SAP is "Secondary Audio Program", where you can have a second 
>> language on a seperate audio carrier.  So, the primary audio would be 
>> English, secondary in the US is traditionally Spanish.  I can see 
>> where it'd be useful in live TV mode, and there's an ivtv control 
>> that lets you choose SAP, but I don't think MythTV does anything like 
>> that right now.
>> So, on second thought SAP probably isn't a volume control thing as 
>> much as it is something else.  What that something else is, I'm not 
>> sure yet. :)
>
>
>
> You have the same with DVB where you can have multiple audio pids.  
> The others probably have AC3 or similar on them
>
> I think there could be a "cycle audio channel" option which would do 
> different things on DVB, hardware terrestrial card, terrestrial card, 
> etc.  For normal cards it would do more swapping left right channels, 
> etc, for DVB it does something more clever, etc.


I know nothing about DVB, but we already support multiple audio tracks 
in things like MPEG2 streams.