[mythtv-users] raw ac3 out the S/PDIF ?

John P. Poet john at BlueSkyTours.com
Thu Dec 11 12:41:14 EST 2003


On Thu, 11 Dec 2003, Paul Woodward wrote:

> There has been some discussion of this during the last week in the list. There have been some suggestions of a hardware problem with some motherboard chipsets which prevent the hardware-passthrough from working. What motherboard are you using?


I have a DFI Pro875B with C-Media CMI9739A codec.

I don't think it is a hardware problem.  Passing AC3 out the S/PDIF works
great when running mplayer directly.  I just don't know how to configure
MythTV to do it.


John



> I am in the same position - my hifi refuses to decode anything sent through with the hwac option. It does however work fine under the default mythtv settings.
>
> Paul
>
> > --===============2088672344==
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> >
> > Using my pcHDTV card for input, I can get pretty good output using MPlayer
> > 1.0pre3 and ALSA 1.0.0rc2 with the following command:
> >
> > mplayer -ao alsa9:spdif -ac hwac3 -vo xv -autosync 30 -fs cbs.ts
> >
> > Only thing missing is a deinterlacer.
> >
> >
> > I have MythTV built from cvs last night (Dec 10th), and after a bit of
> > fiddling I can use it to *watch* a digital channel.
> >
> > What I cannot do, is hear any sound.  I have ALSA support compiled in, and (I
> > believe) enabled.  I also have the SPDIF check box selected.
> >
> > Can somone give me a clue on how to send the raw AC3 audio stream out the
> > S/PDIF jack of my on-board sound?
> >
> > Thanks,
> >
> > John
> >
> >
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> >
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