[maemo-developers] gstreamer question

[From: Stefan Kost]

Kwan Hong Lee schrieb:
> Hi,
> 
> So I guess Adder is part of the solution.  Another question is how to go 
> about adding multiple mono streams and output a stereo stream with 
> variable contribution to left and right gain.  I see that audioop 
> provides some functions like that, but I can see to find out what 
> gstreamer element can do mono to stereo or stereo to mono and change 
> gain values for left and right channel.  Any pointers?

come on, audiopanorama is not that hard to find.

> 
> Finally, on the maemo platform, gstreamer supports ilbc.  Is there any 
> way I can mix ilbc streams? 
I don't think you can do. You can mix raw streams. Just mix before you encode.

Stefan

> It deosn't seems like adder supports this.  
> Any insights on how to go about this?
> 
> Thank you!
> 
> -kwan
> 
> On Sat, Feb 23, 2008 at 4:03 PM, Stefan Kost <ensonic at hora-obscura.de 
> <mailto:ensonic at hora-obscura.de>> wrote:
> 
>     Kwan Hong Lee schrieb:
>      > Hi,
>      >
>      > I am trying to combine multiple streams of audio both from a file and
>      > from the network and mix them and output them into single stream.
>      > I see that there's tee and n-to-1 but not sure how to utilize
>     them.  Any
>      > examples that has details on how to handover buffers of data between
>      > these components?
>     There is no ready written code. Adder (mixing) is easy to use. Just
>     link your
>     n-soures to it. Regarding the data-flow - the components do that by
>     them self.
>     Please read gstreamer documentation and study the examples in the
>     source tar-balls.
> 
>     Stefan
>      >
>      > Does anybody have any insights or guidance in how to manage this?
>      Also
>      > has anybody tried doing ilbc decoding and getting a raw audio packets
>      > out of it?
>      >
>      > Thank you!
>      >
>      > -kwan
>      >
>      > --
>      > http://www.media.mit.edu/~kwan/info.html
>     <http://www.media.mit.edu/%7Ekwan/info.html>
>      >
>      >
>      >
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> 
> 
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