[FFmpeg-devel] [RFC] Channel layouts

Andreas Öman andreas
Fri Aug 29 16:35:30 CEST 2008

Dominik 'Rathann' Mierzejewski wrote:
> What if you have 4 speakers but in a different layout than the
> encoded one? With the two layouts above (C+L+R+S encoded and L+R+SL+SR
> speakers) I'd expect the sound to come out of the front speakers only,
> with C+S channels mixed equally with L and R. This could be done by the
> codec or an audio filter if the codec isn't capable.

This belongs to the audio layer of a mediaplayer IMHO.
Most AV Amplifiers support stuff like:

* Phantom Center         (Mix C to L+R)
* Phantom LFE            (Mix LFE to L+R)
* Small Front speakers   (in 2ch mode, mix L+R to LFE)

certainly it should stay out of the codecs.

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