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List:       mplayer-users
Subject:    Re: [MPlayer-users] 5.1 DTS downmixed to stereo using pan filter
From:       Matyas Sustik <mplayer.list () sustik ! com>
Date:       2008-12-31 15:48:40
Message-ID: 495B9458.6090402 () sustik ! com
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Avinash Meetoo wrote:
> On Sat, Dec 27, 2008 at 12:13 PM, Avinash Meetoo <avinash@noulakaz.net> wrote:
>> and, consequently, the following stereo downmix works great:
>>    mplayer in.wav -vc null -vo null -ao pcm:fast:file=out.wav
>> -channels 6 -af pan=2:1:0:0:1:1:0:0:1:0.707:0.707:1:1
> 
> Except that, on some tracks, the LFE content causes clipping. I'm using
> 
>     mplayer in.wav -vc null -vo null -ao pcm:fast:file=out.wav
> -channels 6 -af pan=2:1:0:0:1:1:0:0:1:0.707:0.707:0.5:0.5
> 

From an example on the mplayer man page I gather that negative numbers are
also supported.  The following is the fixed version of a downmix from the
mplayer man page:

-af pan=2:1:.39:.6:.6:.39:.17:-.17:-.17:.17:.32:.32:.33:.33

(Fixed so that the order is: FL, FR, SL, SR, FC, LFE.)

I also use the pan filter to test 6 channel audio encodings on a stereo system.

Matyas
-
Every hardware eventually breaks.  Every software eventually works.
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