[mythtv-users] Stutter issues with HDTV

Wed Aug 18 08:56:54 EDT 2004

Sure - here it is.

----- Original Message -----
From: "Blammo[doh]" <blammo at dohboys.com>
Date: Tue, 17 Aug 2004 21:01:59 -0700
To: "Discussion about mythtv" <mythtv-users at mythtv.org>
Subject: Re: [mythtv-users] Stutter issues with HDTV

> Since I, and I"m sure several others, are about to wade into HD contect, you
> mind posting your XF86Config, esp your AGP setting?
> 
> 
> ----- Original Message ----- 
> From: "john roberts" <homepagez at lycos.com>
> To: "Discussion about mythtv" <mythtv-users at mythtv.org>
> Sent: Tuesday, August 17, 2004 8:30 PM
> Subject: Re: [mythtv-users] Stutter issues with HDTV
> 
> 
> >
> > Well - good news (sorta).  After applying all the suggestions in this
> thread:
> >
> > 1) re-niced X above that of frontend
> > 2) change march in config.mak video lib build
> >
> > I was able to jussssst get it to not stutter on HDTV 1080i content.  CPU's
> (HT P4 2.6G) are at high 90's% and cranking away.
> >
> > But - the big winner was the change of the AGP setting in the XF86Config
> file.  I had it set to use the nVidia AGP and it was only until I changed it
> to use option "2" (which I believe was the kernel AGP support - I don't have
> the README in front of me right now) that I saw the majority of the stutter
> go away.
> >
> > Tweaking 1 and 2 above helped get the rest away.
> >
> > So - one last question about de-interlace options (now that I can do this
> since I'm not using XvMC) :)
> >
> > I've read that the "Bob" de-interlace filter is one of the better
> filters... but when I enable that filter I see interlace issues.  When I
> enable the other filters (linear or kernel) it smooths out.
> >
> > Why would "Bob" be doing this?
> >
> > Thanks - the AGP help was what put it over the top.
> >
> > A P4 2.6G can -just- do HDTV (without XvMC) if you tweak the crap out of
> it.
> >
> > -John
> >
> >
> > ----- Original Message -----
> > From: Mike Benoit <ipso at snappymail.ca>
> > Date: Tue, 17 Aug 2004 15:59:24 -0700
> > To: Discussion about mythtv <mythtv-users at mythtv.org>
> > Subject: Re: [mythtv-users] Stutter issues with HDTV
> >
> > > I'm not sure how well the P4 2.6Ghz overclocks, but it may be worth a
> > > shot to "see" if a few hundred extra Mhz will do the trick. If it works,
> > > at least you know what is required, then you can decide to leave it
> > > overclocked or go the safe route and just buy a faster processor.
> > >
> > > I know with my Athlon 2400, I could do two recordings at once, but as
> > > soon as I started to watch one of the recordings at the same time, it
> > > pushed it over the edge. So I overclocked it a bit, got another 150mhz
> > > or so which gave me just enough to do everything I needed. Its been
> > > running stable like that for the last year now.
> > >
> > >
> > > On Tue, 2004-08-17 at 15:28 -0500, john roberts wrote:
> > > > I've got ARCH set as pentium4 - so I don't believe that's the issue.
> And yes you are correct - a world of difference when not set to pentium4.
> > > >
> > > > Also - I do a nice --adjust=-5 or something when I start the
> frontend - so I believe that's ok.
> > > >
> > > > I'm thinking 2.6G is just not fast enough.  I believe the note on
> having a 2.8 or greater is correct - it seems I'm on the threshold of it
> working.
> > > >
> > > > Thanks for the info,
> > > >
> > > > -John
> > > >
> > > > ----- Original Message -----
> > > > From: "john roberts" <homepagez at lycos.com>
> > > > Date: Tue, 17 Aug 2004 12:54:03 -0500
> > > > To: mythtv-users at mythtv.org
> > > > Subject: [mythtv-users] Stutter issues with HDTV
> > > >
> > > > >
> > > > > Hi - me again - the HDTV stutter guy. :)
> > > > >
> > > > > The only way I've been able to get my HDTV 1080i content not to
> stutter is with using XvMC enabled.  Ane I've confirmed the quality of the
> picture is less then "software" enabled de-interlacing support.
> > > > >
> > > > > So - I'm thinking of buying a new CPU and I'm wondering what speed I
> should get.
> > > > >
> > > > > I currently have a 2.6G P4 HT 800 FSB.  I've heard from others
> (Wendy on the list) who has had stutter issues with a 3.0 P4 HT.
> > > > >
> > > > > Do I need to go to 3.2G?  Is this not a CPU issue?  I've had this
> HDTV stutter issue with 0.15.1 and the latest (as of 8/16/04) CVS tree.
> > > > >
> > > > > Any thoughts before I go my a new processor?  I'm not crazy about
> the idea of doing so - the darn things are expensive.  I thought by getting
> a FX5500 (which would do XvMC) I wouldn't have had to do this.
> > > > >
> > > > > Thanks,
> > > > >
> > > > > -John
> > > > > -- 
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> > > >
> > > -- 
> > > Mike Benoit <ipso at snappymail.ca>
> > >
> >
> > >
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