[MEncoder-users] ac3 5.1 question

[Andriy Babiy]

> From: Giacomo Comes <comes at naic.edu>
> Subject: Re: [MEncoder-users] ac3 5.1 question
> To: MEncoder usage discussions <mencoder-users at mplayerhq.hu>
> Message-ID: <20070606120956.GA28131 at monopoli.naic.edu>
> Content-Type: text/plain; charset=iso-8859-1
>
> On Tue, Jun 05, 2007 at 10:58:46PM -0700, Andriy Babiy wrote:
> > > From: "Kevin Downey" <redchin at gmail.com>
> > > Subject: Re: [MEncoder-users] ac3 5.1 question
> > >
> > > On 6/4/07, Andriy Babiy <ABabiy at shaw.ca> wrote:
> > > > Hi everybody.
> > > >
> > > > Could anyone advise me on which option should I use to build
> > > > mplayer to make them recognize ac3 5.1 audio?
> > > > Everything was OK with that; then, I rebuilt mplayer and changed
> > > > some options. Frankly speaking, I can't remember what exactly.
> > > > Now, I have:
> > > >
> > > > +++++
> > > > $ mplayer -identify PosKin-1.avi
> > > > MPlayer 1.0rc1-3.4.6 (C) 2000-2006 MPlayer Team
> > > > CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (Family: 15, Model: 4,
> > > > Stepping: 3) CPUflags: ?MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1
> > > > SSE2: 1
> > > > Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2
> >
> > [ snip ]
> >
> > > >==== Opening audio decoder: [liba52] AC3 decoding with liba52
> > > > Using SSE optimized IMDCT transform
> > > > Using MMX optimized resampler
> > > > AUDIO: 48000 Hz, 2 ch, s16le, 384.0 kbit/25.00% (ratio:
> > > > 48000->192000) ID_AUDIO_BITRATE=384000
> > > > ID_AUDIO_RATE=48000
> > > > ID_AUDIO_NCH=2
> > > > Selected audio codec: [a52] afm: liba52 (AC3-liba52)
> > > > ==================================================================
> > > >====
> > >
> > > ?-channels 6
> >
> > Thanks for the reply.
> > But actually I meant different thing. I know I can play it 5.1
> > using -channel 6 option to mplayer. My question is about recognizing
> > the movie as 5.1 ac3 rather than 2 ch ac3 as it is displayed above.
> >
> > Another example:
> > +++++
> > Opening audio decoder: [liba52] AC3 decoding with liba52
> > Using SSE optimized IMDCT transform
> > Using MMX optimized resampler
> > AUDIO: 48000 Hz, 2 ch, s16le, 448.0 kbit/29.17% (ratio: 56000->192000)
> > ID_AUDIO_BITRATE=448000
> > ID_AUDIO_RATE=48000
> > ID_AUDIO_NCH=2
>
> This value here is the argument of -channel and default to 2.
>
> > Selected audio codec: [a52] afm: liba52 (AC3-liba52)
> > +++++
> >
> > It's another movie, but the problem is the same.
> > Before I was receiving an output with the line like:
> >
> > AC3: 5.1 (3f+2r+1fe) 48000 Hz 448.0 kbit/s
>
> Add -v to the command line and you will see the previous information in
> the output.
>
> Giacomo

Hi Giacomo:
That's exactly what I was looking for! So, nothing is broken with my 
install, I just needed -v switch.
Thank you!

Andriy