[mythtv-users] choppy sound; was: Re: choppy sound & lousy picture

[matthew.garman at gmail.com]

On Fri, Dec 30, 2005 at 07:27:25PM -0600, matthew.garman at gmail.com wrote:
> I just got my first MythTV box up and running.  Hardware:
>     
>     * Chaintech 7NIF2 Motherboard
>     * Athlon XP 2500 CPU
>     * 512 MB RAM
>     * Hauppage WinTV-PVR-150
>     * Seagate 7200 RPM 80 GB PATA hard drive (using DMA)

FYI: hdparm -t /dev/hda

/dev/hda:
 Timing buffered disk reads:  144 MB in  3.05 seconds =  47.24
 MB/sec

Shouldn't be a disk performance problem.

> I am currently facing two problems: (1) under mythtv (only), the
> audio is choppy, and (2) the video is fuzzy.
>
> As for (1), if I run "mplayer -fs /dev/video0", the audio and video
> are perfectly in sync, with no stuttering or choppiness.  However,
> both live tv AND recorded tv have audio (and video, although to a
> lesser extent) that is choppy: several brief pauses every second or
> two.  Definately too annoying to ignore.

I'm still facing this problem.  Along with the noticeable
"studdering" or "choppiness", I get lots of "prebuffering pause"
messages.

I re-compiled withOUT oss support, and am now using ALSA natively.
That did not help the situation.  Also, while watching live TV,
according to top, mythfrontend is taking up about 20% of the CPU's
time, and X is taking about 10%.

As for the second problem, that seems to have magically worked
itself out.  So I'm going to concentrate on this choppy audio
problem for the time being.

Any help is much appreciated!

Thanks,
Matt

-- 
Matt Garman
email at: http://raw-sewage.net/index.php?file=email