[mythtv-users] "prebuferring pause" - very high CPU - "strange error flushing buffer" - EPIA M card

Tom Dombrosky tbdombrosky at gmail.com
Fri Mar 4 20:51:45 UTC 2005

On Fri, 4 Mar 2005 00:12:44 +0100, jerome lacoste
<jerome.lacoste at gmail.com> wrote:
> Hi
> I am setting up my first mythtv box. So running into loads of
> problems, and slowly sorting them out :)
> I looked at various docs and list archives but am getting stuck.
> So far I can play music well. That's a good start. The box plays TV
> well with xawtv & tvtime, but that doesn't prove mythtv will work....
> I've tried the mute input line + aplay /dev/dsp trick. The box is
> responsive although the sound is cracking at best. Not sure of what to
> do with that, I went on.
> The other problem I am having is a lot of "prebuffering pause"
> messages output by the frontend. At the same time the backend logs a
> single "strange error flushing buffer". I've noticed that while this
> is happening the ring buffer is getting filled, but I guess that is
> normal. If I pause the TV while playing then unpause it, it doesn't
> solve the problem. The box is at 98% CPU while I do that, so it may be
> a CPU problem. Bit I thought that my setup was not that untypical...
> see below:
> - EPIA M (Nehemiah) box
> - Terratec Cinergy 600 TV (saa7134)
> - mythtv 0.17 as taken from Debian unstable + patch for unichrome XvMC
> - kernel 2.6.10 + various patches for EPIA
> - alsa 1.0.8
> - .asoundrc for via82xx
> Any input appreciated.
> Jerome

It looks to me like you need a more powerful cpu or a capture card
with onboard encoding.  Those C3 chips don't have enough power for
encoding and decoding on the same machine.  If you stick a PVR250 in
there instead of the Cinergy, most of your problems should go away.


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