[mythtv-users] Slow/choppy playback problem (not the usual ones , either!)

Joseph A. Caputo jcaputo1 at comcast.net
Fri Oct 15 15:08:12 UTC 2004

On Friday 15 October 2004 01:20, Yan-Fa Li wrote:
> Hey Joshua,

[snip discussion of the relative shortcomings of PCI video vs. AGP]

> I would guess adding an AGP video card is probably the way to go.
> Yan
> Joshua M. Thompson wrote:
> > On Thu, 2004-10-14 at 19:27 -0700, Yan-Fa Li wrote:
> >>Looks like you're not running nvidia's X server driver...  Wait a
> >>minute.  GeForce PCI!!!!!  You're running the video off the PCI BUS
> >> ? Say it ain't so.
> >
> > The card previously came from my old Shuttle machine which had no
> > AGP, so yes it is PCI and yes it's running the nvidia v61.11
> > drivers.
> >
> > Although I could be wrong the fact that it runs great with mplayer
> > seems to indicate that there is some other issue. Before getting
> > the PVR350 I used this machine to play movies off my NFS server,
> > and those are custom-compressed high-bandwidth, full-resolution
> > .ogm files (including multiple AC-3 audio tracks) ripped right from
> > my original DVDs. If it can handle *those* I would think MythTV
> > should not have a problem. Plus lots of people use the 350 as an
> > unaccelerated framebuffer just fine and that's PCI too.
> >
> > I can try picking up a cheap AGP card with video out over the
> > weekend if you really think that will help, but I strongly suspect
> > the issue is elsewhere based on my observations.

Based on Joshua's observation that video performance is fine using 
mplayer to play the stream from the PVR-350, combined with the fact 
that a number of other folks on the list are using PCI video (some with 
analog framegrabber cards, which puts even more of a load on the PCI 
bus), I'd say that, although it may be true that AGP outperforms PCI 
for video, that is not the source of his problems.

Joshua, what does your LiveTV recording profile look like?


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