[mythtvnz] jumpy video

[Nick Rout]

On Thu, Sep 4, 2008 at 11:13 AM, Steve Hodge <stevehodge at gmail.com> wrote:
> On Tue, Sep 2, 2008 at 8:53 PM, Steven Mulvay
> <steven.mulvay at slingshot.co.nz> wrote:
>>
>> Hi All, how are you?
>> I've finally got mythbuntu tuned up and running but the video is
>> extremely jumpy, audio clips a little bit too, but nowhere near as bad
>> as video.  Live TV and TV recordings are as bad as each other.
>
> It shouldn't be CPU, but what does top say when you're watching?
>
>>
>> My CPU shouldn't be drained very much because I'm using a PVR-150 which
>> is a hardware MPEG-2 encoder. I am wondering whether Mythbuntu is
>> having trouble using the encoder, although there are no errors shown on
>> start-up. (I have splash turned off)
>
> It's not having problems using the encoder - if it was it wouldn't record at
> all. But just in case try copying one of the recordings to another machine
> to rule out the recordings as an issue.
>
> Have you tried watching anything with mythvideo? Does that have the same
> issue?
>
> If that's not a SATA drive it might be drive performance - make sure DMA is
> on (hdparm -d /dev/hd...)
>
> Is X setup correctly? Try playing something using Xine or mplayer. If they
> work ok then the problem is Myth, otherwise the problem is something in your
> system and X would be a prime candidate at that point.
>
> Cheers,
> Steve

Saw someone comment on the main mythtv list recently that moving from
ext3 to xfs fixed a lot of prebuffering pauses and similar glitchy
things.

http://www.gossamer-threads.com/lists/mythtv/users/347976#347976