[mythtv] playback quality
Allen T. Gilliland IV
Mon, 11 Nov 2002 01:07:18 -0800 (PST)
The quality loss I am getting in the video looks like
the video isn't able to keep up. The frames have
tears in them that flicker ... not a whole lot ... but
enough and constant. I am also losing frames
regularly. I would guess that it is my cpu not
keeping up ... or my HD not keeping up.
I measured my HD speed using hdparm.
#hdparm -t /dev/hda
15MB/s seems awful slow to be doing writes and reads
from the disc constantly ... especially recorded video
I am doubtful that it is my video card, tv card, or
sound card ... however I was getting much better
playback on my normal station ... a 2.4GHz + gf4 Ti
... so there is some difference between the two that
is causing this loss of quality.
--- Ray <firstname.lastname@example.org> wrote:
> On Sun, Nov 10, 2002 at 01:30:56PM -0800, Allen T.
> Gilliland IV wrote:
> > I've got my mythtv setup and running normal now,
> > the quality is not all that great.
> Could you be a little more descriptive? Is it
> jerky, slow, lots of
> compression artifacts what? Does it change if you
> just record and palyback
> later rather than watching while recording? What
> resolution are you
> encoding at?
> > I am using my
> > older machine which has:
> > AMD T-bird 1200Mhz
> > GeForce 2 MX 400
> > SoundBlaster AWE64 ISA :(
> > WinTV-dbx 401
> > IBM 25GB UDMA HD @ 14.81MB/s
> > Gentoo Linux 2.4.19
> > rtjpeg codec
> How was that hard drive speed measured? At first
> glance I'd say that could
> be your bottleneck. Do you have any other specs on
> the drive?
> > I am wondering how well this machine should
> > My picture when watching tv on my monitor is not
> > that great ... I am going to assume this is the
> > of my gf2 MX. However the card should be more
> > capable of doing 60fps on any resolution with
> > rates than a tv. Would a radeon or gf3/4 serve me
> > better?
> A faster video card isn't going MythTV one way or
> the other IMHO.
> mythtv-dev mailing list
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