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From: naddy@mips.inka.de (Christian Weisgerber)
Date: Wed, 20 Jan 2010 01:46:21 +0000 (UTC)
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Originator: naddy@mips.inka.de (Christian Weisgerber)
To: freebsd-multimedia@freebsd.org
Subject: Re: snd_hda multichannel support added
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Clemens Ladisch <clemens@ladisch.de> wrote:

> > > On a vaguely related note: Is there anything anywhere in the open
> > > source world that real-time encodes multi-channel audio into AC3
> > > or DTS so that it can be squeezed through an S/PDIF link?
> > 
> > ffmpeg?
> 
> I don't think the tool can be made to work in real time.
> 
> ALSA's a52 plugin uses ffmpeg's libavcodec to convert 6-channel PCM to
> AC-3.

It turns out that new versions of mplayer can do that, too.
The magic to use is "-af lavcac3enc".

I assume this will be available once the mplayer port has been
updated...

-- 
Christian "naddy" Weisgerber                          naddy@mips.inka.de