[mythtv] Running with no sound card

Isaac Richards ijr at po.cwru.edu
Mon Nov 22 17:41:49 UTC 2004

On Monday 22 November 2004 12:26 pm, Jeremiah Morris wrote:
> On 22 Nov 2004, at 8:18 AM, Roger James wrote:
> > I have been successfully running Myth on a box without a sound card,
> > using
> > the tv-out facility of a PVR-350 for both video and audio. When I try
> > this
> > with a recent CVS build I now get warnings saying that that /dev/dsp
> > cannot
> > be opened and asking if I want to continue without sound. If I continue
> > sounds works as expected via the PVR-350.
> >
> > Looking at the code, I cannot see a straightforward way to disable this
> > warning.
> I haven't worked with the relevant code, and I don't even have a 350,
> but it looks like the problem is in NuppelVideoPlayer.cpp.  In
> OpenFile, it sets disableaudio when an IVTV decoder is in use.  In
> StartPlaying, it ignores the disableaudio setting if we're in the IVTV
> decoder case, and tries to open an audio device anyway.
> Question for anyone knowledgeable: Is this designed so that 350 users
> can optionally use other audio output?  If so, the attached patch
> allows the open to fail silently for PVR-350 users.  This should help
> Roger's situation, but I'm not at all certain that it's the best way to
> solve this problem.

It's designed so that pvr-350 uses can use the internal volume controls.


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