[vdr] How do I listen to a channel's soundtrack and it's audio description at the same time?

[scott]

On Sat, 05 Sep 2009 18:39:27 +0200, Udo Richter <udo_richter at gmx.de> wrote:
> On 02.09.2009 07:49, John Robinson wrote:
>> I would very much like to
>> hear the main programme's soundtrack and the audio description track at
>> the same time, but at the moment, I can only hear one or the other - not
>> both.
> 
> Hmmm, interesting task. However, I don't think that this is possible 
> currently. Output devices are currently designed to handle one audio 
> channel, not multiple at the same time. Mixing them to one would require 
> decompressing and re-compressing them and would probably introduce 
> timing issues.
> 
> There may be a quirked solution like playing back the second channel 
> externally, like connecting to it using mplayer+streamdev, however thats 
> not very comfortable.
> 
> The best solution is probably a dedicated plugin that connects to live 
> view and plays the secondary audio track in parallel. However I don't 
> think that such a plugin exists currently.
> 
Not sure this helps, but mplayer manages to do this with vdr recordings. 
Isn't there a script somewhere that uses mplayer as the playback device?

--
Scott