[mythtv-users] E: nvidia new drivers hdtv/interlacing, any benefit
for us non HDTV people?
J. Donavan Stanley
jdonavan at jdonavan.net
Mon Jul 5 09:48:05 EDT 2004
Thomas Börkel wrote:
> HI!
>
> J. Donavan Stanley wrote:
>
>>>> It's highly dependent on the shows you watch, most shows I watch
>>>> look perfect as long as I have the A/V sync turned on, those that
>>>> don't look
>>>
>>>
>>> You mean the experimental A/V sync? What about jitter reduction?
>>
>>
>> A/V sync requires jitter reduction in 15.1, recent CVS builds have
>> the two separated if memory serves me.
>
>
> I did not try A/V sync, yet. What does it do exactly? For me, audio is
> in sync with video, as far as I can tell.
A/V sync tries to ensure that the video is being displayed in sync with
the vertical retrace of your TV. This results is much smoother looking
video.
> 1.
> With the old NVidia driver, I could not watch car racing, because the
> cars jumped. With the new driver, this jumping is gone. I think that's
> because I set the Flicker Filter in the nvidia-settings tool to 1 (0
> does not work correctly), where the default is 127 (out of 255).
> But the motion of the cars still looks blurry.
I have mine set to something like 101 because lower than that flickered
too much (oddly enough).
> 2.
> When I watch shows from NTSC land, that have been converted to PAL,
> motion and panning is jerky.
I would imagine it would be since they use different refresh rates so
you're never going to get "perfect" NTSC output on a PAL TV..
> I have big audio buffer on and also enabled jitter reduction. Without
> that, background motion is always jerky (even for native PAL shows).
>
> What else can I do? Will A/V sync and kerneldeint help eliminate blur
> and jerky motion?
Both might help. Also make sure that you're not using Twinview, or XvMC
and that you've told the nvidia card that you have only have a TV
connected and what format the TV is in.
Using a higher bitrate might also help. It'll almost certainly help
overall quality.
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