[mythtv-users] plextor convertx tv-402u audio dying

[Adam Felson]

> Nathan Lutchansky <lutchann-mythtvusers at litech.org> wrote:

> On Tue, Aug 16, 2005 at 09:46:09PM -0700, Adam Felson wrote:
> > I recently got a plextor usb2 tv capture box and am having problems with
> > the audio.  It can barely go 20-40 minutes without dying.  Once the
> > recording is stopped and another one started then the problem is
> > cleared... for a little while.  When watching live-tv, I can get things
> > working again by exiting live-tv and going right back to it.
> 
> Is the audio OK before you lose it?  Is there any stuttering or does it
> get out of synch with the video?  Are you recording uncompressed audio
> or MP3?
It's fine right until the point it dies.  I'm recording mp3;  I've tried
32Khz and 48khz sample rates.



> 
> > The errors in the mythbackend log are of the form:
> >  2005-08-16 21:37:30.298 NVR: Only read -1 bytes of 16384 bytes from
> > '/dev/dsp1 
> > read audio: Input/output error
> 
> Sounds like the audio buffer on the hardware is getting overrun, which
> causes the audio pipe to lock up.  Usually this happens because of bus
> errors or because the host CPU can't service the audio pipe fast enough.
> 
> What video bitrate are you running?  Is the convertx connected to a USB
> 2.0 port?  Do your other USB devices work OK?  Have you tried swapping
> out the USB cable, or hub, if you're using one?  -Nathan

It's connected straight to a USB 2.0 port and the error occurs with no
other USB activity.  I haven't tried using a different USB cable yet.
About 2000-2200 kb/s. (.7-1.0GB/hr)

If nobody else has experienced anything like this, then it's possible I
have bad hardware.