[MEncoder-users] ac3 channel mapping

[Rolf Ernst]

On Wed, May 11, 2011 at 2:01 PM, Mailing List <mblainml at earthlink.net>wrote:

> Rolf Ernst <rolf.ernst at silverlightning.org> wrote in
> news:BANLkTinTcGAa8VcDDTuijE71TOWKFBxM=w at mail.gmail.com:
>
> > Googled and googled but couldn't find the info or syntax for the
> > channel mapping:
> >
> > I have ac3 audio in my input file and just want to downsample the
> > bitrate, essentially leave the channel mapping in place. First of
> > all, mencoder is a bit confused and thinks it is 2 channel but
> > mediainfo clearly says six channels. That aside, I let it guess
> > the channel assignments but it clearly gets it wrong. Mediainfo
> > says that this is my channel assignment: Front: L C R, Side: L R,
> > LFE (of course, I do not know whether this is correct but
> > generally pretty reliable). What do I have to specify for
> > -channels? Or do I specify -pan? Anyhow, how do I get the channel
> > assignment right?
> >
>
> This chart with suggested mapping commands should help.
> "Understanding Channel Arrangements for 5.1 Audio Formats"
> http://wiki.flexion.org/ConvertingMKV.html#7.2
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>


Great. This is exactly what I was looking for. Must bookmark.;-)
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