[mythtv-users] Stuttering sound and 100% cpu after channel changes

[Isaac Richards]

On Sunday 08 February 2004 05:21 pm, Jeppe N. Madsen wrote:
> I'm currently trying out mythtv and are testing on some old hardware
> before committing to a full setup.
>
> I've observed the following: If I watch livetv and let the livetv
> buffer fillup (I've set it to 2gb so approx 1 hour) and change
> channel, the sound starts to stutter and the backend cpu usage goes to
> 100%. The frontend logs some "prebuffer wait timed out"
> messages. Changing channel again improves the situation slightly, but
> the backend still uses more than 50% cpu (usally 98% idle during
> livetv). It seems the only solution is to exit livetv and start again.
>
> Note that changing channels before the buffer is full seems to work fine.
>
> Setup: Myth 0.14, PVR-250 ivtv 0.1,9, separate backend (550 p3) /
> frontend (800 Duron) both running FC1.
>
> Any hints?

Fixed in CVS last week.  Problem was some really poor code in ffmpeg 
(libavformat).

Isaac