[mythtv-users] HD plays fine, SD jerky video and sound?

[Mark Hutchinson]

On 2/7/08, Michael T. Dean <mtdean at thirdcontact.com> wrote:
>
> On 02/07/2008 02:05 PM, aaron wrote:
> > On 2/7/08, Mark Hutchinson <mark at onnow.net> wrote:
> >
> >> Live tv from mythfrontend, HD channels are fine, SD channels are very
> >> jerky with stuttering sound.
> >>
> >> I have tried many many things.  Ideas on how to diagnose this?  No
> >> really anything in the frontend or backend logs.
> >> How can SD be harder or more intensive to play than HD?
> > This might be way off, but if there's no Xv, Myth will need to do
> > software scaling, right? Could it be that it takes more effort to
> > scale the SD resolution (which would be something like 720x480) up to
> > 1920x1080 than to (decode HD + scale to 1080) ?
>
> It's actually the playback profile he's selected (he's using SVN
> trunk--for the archives, the same will apply as users upgrade to 0.21).
> Covered in the thread
> http://www.gossamer-threads.com/lists/mythtv/users/314849#314849 (though
> the post hasn't hit the archives, yet).  It will be one from me later in
> the thread.
>
> Mike
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Mike, do you then recommend that I modify the profile for SD and HD
seperatly?  Or am I misunderstanding?
My HD is good, what should I set for SD with a Nvidia 8600 with no xv?
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