[mythtv-users] HD plays fine, SD jerky video and sound?
Mark Hutchinson
mark at onnow.net
Thu Feb 7 19:42:13 UTC 2008
Kevin Kuphal wrote:
>
>
> On Feb 7, 2008 1:05 PM, aaron <memoryguy at gmail.com
> <mailto:memoryguy at gmail.com>> wrote:
>
> On 2/7/08, Mark Hutchinson <mark at onnow.net
> <mailto: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) ?
>
>
> He could probably easily test this by using the controls in Myth to
> provide different playback resolutions depending on the content so
> that SD is scaled to 720x480 or something closer to the capture
> resolution and HD is presented at the native resolution. The HDTV
> should be able to compensate for the change.
>
> Kevin
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>
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Where are these settings in mythfrontend? Or mythtvsetup?
Thanks!
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