On Wed, Aug 17, 2005 at 04:37:55AM -0700, Adam Felson wrote: > > Nathan Lutchansky <[EMAIL PROTECTED]> 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.
You want to use 48khz as that's the only sampling rate the hardware supports. > > > 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. Yeah, sounds likely, but the question is which piece of hardware? :-) Are there any interesting messages in your system log that might indicate a problem? -Nathan
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