[MPlayer-users] playing multiple audio streams

[info at danielerossi.net]

Nico Sabbi wrote:
> risto.paasila at alcatel-lucent.com.au wrote:
>
>> Hello,
>>
>> I have WMV9 files which contain language tracks -aid 1 gives me 
>> original language stream, and -aid 2 gives me a transalation stream.
>> Both streams have 2 channels.
>>
>> I wish to have 4 channel output, say with original language on 
>> channels 0 and 1,
>> and the translated language on channels 2 and 3.
>>
>> Is it possible?
>>  
>>
> at the moment mplayer can only decode 1 audio track at a time
>
probably you should mix the four channel in a four channel ac3 audio stream.
You can use avimerge or mkvmerge.
With mencoder I don't know and would like to.
The section 
http://www.mplayerhq.hu/DOCS/HTML-single/en/MPlayer.html#menc-feat-dvd-mpeg4-audio
seems not (yet) complete.