[mythtv-users] PVR 350 not capturing audio

Wayne Richards wrichards at taxupdate.com
Fri Apr 16 12:53:52 UTC 2010


On Thu, Apr 15, 2010 at 04:58:05PM -0600, Brian Wood wrote:
> On Thursday 15 April 2010 04:39:59 pm Wayne Richards wrote:
> > I just built a gentoo system and installed mythtv-0.22.  It has a PVR 350
> >  as video0 and a PVR 150 as video1.  I'm not using the TV-out on the
> >  350--instead it has a GeForce 7300 with s-video output.
> > 
> > Testing the PVR 350:
> > > cat /dev/video0 > /tmp/test.mpg
> > 
> > produces the output file, but playing it with mplayer gives:
> > 
> > MPlayer SVN-r29796-4.3.4 (C) 2000-2009 MPlayer Team
> > 
> > Playing test.mpg.
> > MPEG-PS file format detected.
> > MPEG: No audio stream found -> no sound.
> > VIDEO:  MPEG2  720x480  (aspect 2)  29.970 fps  6000.0 kbps (750.0 kbyte/s)
> > ==========================================================================
> > Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
> > Could not find matching colorspace - retrying with -vf scale...
> > Opening video filter: [scale]
> > VDecoder init failed :(
> > Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
> > Selected video codec: [ffmpeg2] vfm: ffmpeg (FFmpeg MPEG-2)
> > ==========================================================================
> > Audio: no sound
> > Starting playback...
> > Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
> > 
> > Testing the PVR 150:
> > > cat /dev/video1 > /tmp/test.mpg
> > 
> > produces the output file, and mplayer reports that it has audio.
> > 
> > 'uname -a':
> > 
> > Linux mythtv 2.6.31-gentoo-r10 #16 SMP Tue Apr 13 12:13:57 CDT 2010 x86_64
> >  AMD Athlon(tm) II X3 425 Processor AuthenticAMD GNU/Linux
> > 
> > Here's the output of 'dmesg | grep ivtv':
> 
> <deletia>
> 
> > I don't have any options set for the ivtv module.  How do I troubleshoot
> >  this?
> 
> Are you tuning an RF channel or using baseband inputs? I'd try the other 
> source, whatever it is.

No source at all--just static.  Same for each card.

> I've never seen this, even with no audio input. It may be a defective card. 
> The stream should be there, even  if it contains no audio.

I was hoping there's something I overlooked.  Thanks for the help.

Wayne


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