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intermittant stutter watching recorded and live TV
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Subject Author Date
intermittant stutter watching recorded and live TV Luke Tractor 05-27-2008
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Posted by Nigel Barker on June 22, 2008, 11:05 am
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 wrote:

>
>Hi,
>
>Thanks for your reply. However I don't think the problem is anything to do
>with insufficient processing power, my system can play 1080p blu-rays at
>24fps flawlessly with an average cpu usage of 20% (30% peak). It is only
>displaying this intermittent judder on 50hz video - even on standard
>definition.
>
>I am using it with a Sony HD LCD TV at 50hz refresh rate - both 720p and
>1080p resolutions via HDMI.
>
>Any help to troubleshoot this would be much appreciated.
>
>Kind regards,
>
>Pete

I would guess that it is a graphics card/driver/TV combination problem. There
is still work to be done by TV manufacturers & graphics card manufacturers in
getting PCs & TVs to play nicely together most of the time.

What is the native resolution of the TV? What is the graphics card & what
version of graphics driver?
--

Cheers

Nigel Barker
Live from the sunny Cote d'Azur
MCE MVP

Posted by P_J_B on July 3, 2008, 2:46 pm
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Hi Nigel,

Thanks for your reply - apologies for the delay in getting back to you. I
think you're pretty much spot on when you talk about graphics cards and
drivers. However, I don't think the TV is a problem - it works fine when the
PC is running XP at all refresh rates and it works fine in Vista at 60hz and
24hz - just not the 50hz I need.

The graphics card is integrated into the Nvidia Geforce 8200 motherboard
chipset. I've tried all the nvidia drivers starting with 171.37 to the latest
175.19 and everything in between (including betas).

The native resolution of the TV is 1360 x 768 but, as the TV's EDID only
lists this at a 60Hz refresh rate, I have to use the standard consumer video
resolutions of 720p and 1080p, where I can access 50hz refresh rates. This
only affects video scaling though and won't affect the problem of
intermittent stutter I am seeing.

Kind regards,

Pete


"Nigel Barker" wrote:

> wrote:
>
> >
> >Hi,
> >
> >Thanks for your reply. However I don't think the problem is anything to do
> >with insufficient processing power, my system can play 1080p blu-rays at
> >24fps flawlessly with an average cpu usage of 20% (30% peak). It is only
> >displaying this intermittent judder on 50hz video - even on standard
> >definition.
> >
> >I am using it with a Sony HD LCD TV at 50hz refresh rate - both 720p and
> >1080p resolutions via HDMI.
> >
> >Any help to troubleshoot this would be much appreciated.
> >
> >Kind regards,
> >
> >Pete
>
> I would guess that it is a graphics card/driver/TV combination problem. There
> is still work to be done by TV manufacturers & graphics card manufacturers in
> getting PCs & TVs to play nicely together most of the time.
>
> What is the native resolution of the TV? What is the graphics card & what
> version of graphics driver?
> --
>
> Cheers
>
> Nigel Barker
> Live from the sunny Cote d'Azur
> MCE MVP
>

Posted by JW on July 3, 2008, 3:21 pm
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With the custom resolution option in the 175.19 drivers you should be able
to specify 1366 or 1360 x768 at 50Hz.
>
> Hi Nigel,
>
> Thanks for your reply - apologies for the delay in getting back to you. I
> think you're pretty much spot on when you talk about graphics cards and
> drivers. However, I don't think the TV is a problem - it works fine when
> the
> PC is running XP at all refresh rates and it works fine in Vista at 60hz
> and
> 24hz - just not the 50hz I need.
>
> The graphics card is integrated into the Nvidia Geforce 8200 motherboard
> chipset. I've tried all the nvidia drivers starting with 171.37 to the
> latest
> 175.19 and everything in between (including betas).
>
> The native resolution of the TV is 1360 x 768 but, as the TV's EDID only
> lists this at a 60Hz refresh rate, I have to use the standard consumer
> video
> resolutions of 720p and 1080p, where I can access 50hz refresh rates.
> This
> only affects video scaling though and won't affect the problem of
> intermittent stutter I am seeing.
>
> Kind regards,
>
> Pete
>
>
> "Nigel Barker" wrote:
>
>> wrote:
>>
>> >
>> >Hi,
>> >
>> >Thanks for your reply. However I don't think the problem is anything to
>> >do
>> >with insufficient processing power, my system can play 1080p blu-rays at
>> >24fps flawlessly with an average cpu usage of 20% (30% peak). It is only
>> >displaying this intermittent judder on 50hz video - even on standard
>> >definition.
>> >
>> >I am using it with a Sony HD LCD TV at 50hz refresh rate - both 720p and
>> >1080p resolutions via HDMI.
>> >
>> >Any help to troubleshoot this would be much appreciated.
>> >
>> >Kind regards,
>> >
>> >Pete
>>
>> I would guess that it is a graphics card/driver/TV combination problem.
>> There
>> is still work to be done by TV manufacturers & graphics card
>> manufacturers in
>> getting PCs & TVs to play nicely together most of the time.
>>
>> What is the native resolution of the TV? What is the graphics card & what
>> version of graphics driver?
>> --
>>
>> Cheers
>>
>> Nigel Barker
>> Live from the sunny Cote d'Azur
>> MCE MVP
>>


Posted by Nigel Barker on July 4, 2008, 2:09 am
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>With the custom resolution option in the 175.19 drivers you should be able
>to specify 1366 or 1360 x768 at 50Hz.

Probably the TV won't work at that refresh rate with that resolution.
Many(most? all?) LCD TVs will only work at either 1360 x 768 @60Hz or 1280 x
720 @50Hz. I have spent a long time trying to persuade our TV otherwise:-)
--

Cheers

Nigel Barker
Live from the sunny Cote d'Azur
MCE MVP

Posted by Luke Tractor on July 7, 2008, 12:03 am
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i have since found that if i play the same file that was stuttering by use
media player instead of Media centre i dont get the stutter at all. as Media
player doesnt have a fast forward or skip on the menu it makes it a bit
difficult to skip the adverts on the recorded stuff but i have found a
workaround by using my mx logitech mouse forward/back button but
unfortunately it skips 3.30min every time which is a bit long most times.
will have to look where i can change this, possibly in the registry? i still
use media centre to record and set up future recordings and recording
settings.

Luke

"Nigel Barker" wrote:

> wrote:
>
> >
> >Hi,
> >
> >Thanks for your reply. However I don't think the problem is anything to do
> >with insufficient processing power, my system can play 1080p blu-rays at
> >24fps flawlessly with an average cpu usage of 20% (30% peak). It is only
> >displaying this intermittent judder on 50hz video - even on standard
> >definition.
> >
> >I am using it with a Sony HD LCD TV at 50hz refresh rate - both 720p and
> >1080p resolutions via HDMI.
> >
> >Any help to troubleshoot this would be much appreciated.
> >
> >Kind regards,
> >
> >Pete
>
> I would guess that it is a graphics card/driver/TV combination problem. There
> is still work to be done by TV manufacturers & graphics card manufacturers in
> getting PCs & TVs to play nicely together most of the time.
>
> What is the native resolution of the TV? What is the graphics card & what
> version of graphics driver?
> --
>
> Cheers
>
> Nigel Barker
> Live from the sunny Cote d'Azur
> MCE MVP
>

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