[mythtv-users] surround sound audio streams

[jack snodgrass]

On 9/22/06, jack snodgrass <mrlinuxgroups at gmail.com> wrote:
> On 9/22/06, Scott <list-mythtv at bluecamel.eml.cc> wrote:
> >
> > On Sep 22, 2006, at 4:05 PM, jack snodgrass wrote:
> >
> > > How can I switch between the different audio streams while wating a
> > > mythtv hdtv mpg recording?
> >
> > Are you really looking to switch audio tracks between DD 2.0 and DD
> > 5.1? I'm wondering if you're setup is like mine, which is why I ask.
> > For my setup, I have my A/V receiver hooked to the spdif of my sound
> > card. I expect my A/V receiver to do all sound format detection and
> > decoding. Up until recently I was having an issue where my receiver
> > would only see 2 channel PCM analog via the spdif input regardless of
> > if a AC3 5.1 stream was available.
> >
> > Maybe you could state what your physical setup looks like?
> >
> > > I know that there is a 5.1 surround sound
> > > stream because I can play the .mpg file through vlc ( Video Lan
> > > Client )
> > > and on the HDTV recorded .mpg files, I have the option of changing
> > > to the 5.1 stream.
> >
> > I haven't played with VLC in a long time. Is it really switching
> > between audio formats or is it down mixing DD 5.1 surround into DD
> > 2.0 stereo?
>
> to be honest... I don't know... I know this.....
>
> On a HDTV Recorded mpg stream from my mythbackend...
> when I play it with VLC I get different sets of audio options
> as the stream plays.
>
> For example... during a show scene in CSI or NFL Football,
> I can select:
> mono
> stereo
> 2 front / 2 rear
> 5.1
> A52 over S/PDIF
>
> when it goes to commerical I can only select:
> mono
> stereo
> A52 over S/PDIF
> ... the 2 front / 2 rear and 5.1 options go away.
>
> I select 5.1 during the show and I get 5.1 surround sound
> out of my SoundBlaster Creative Audigy Sound card.
> My 5.1 speakers are connected to 3 inputs on the sound card....
> I don't think that it's 'digital'.  with 5.1 surround, I hear voices in
> the center channel and crowd noise / background noise in the
> satelite speakers.
>
> I am assuming since the audio stream during a show list
> 5.1 and the comercials don't... then there IS a 5.1 stream
> of some sort broadcast during the show that alsa and vlc
> can decode.
>
> When I watch CSI or NFL Football with mythtv or mythfrontend...
> I can't get the 5.1 surround sound to work... no woman behind me
> yelling at the refs telling him he's blind..... ;) I love surround sound. ;)
> Scared the crap out of me the first time I watched a HDTV show with
> my speaker set up.
>
> Does that help at all explain my situation?
>
> jack
>

bump