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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I have a similar problem I think. I have a one-box
frontend/backend with Ubuntu 8.10 and JYA’s repositories installed – however I’m
just running SD on a Nova-S card.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Playback looks fine, but with non-VDPAU playback profile the CPU
usage is up around 50-60%, while before I installed JYA’s repositories I was
getting around 10%. This is on a quad core processor, and I’m estimating average
CPU usage across all 4 cores. nVidia 8500GT graphics card.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>With a VDPAU playback profile enabled, the CPU usage is still
very high (~ 40%), and live TV looks good but “hiccups” every few minutes. That
is, it pauses briefly then continues.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Do you think this is the same problem? If it is, then note I’m
on DVB-S not DVB-T.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Regards<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Aaron<o:p></o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
mythtvnz-bounces@lists.linuxnut.co.nz
[mailto:mythtvnz-bounces@lists.linuxnut.co.nz] <b>On Behalf Of </b>Steve V<br>
<b>Sent:</b> Saturday, 9 May 2009 21:41<br>
<b>To:</b> MythTV in NZ<br>
<b>Subject:</b> Re: [mythtvnz] DVB-T HD picture quality VDPAU issue?<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><br>
OK, I finally got back to some testing.<br>
<br>
My problem is definitely a playback issue not a reception issue - yay I can
stop fooling around with the aerial and cabling.<br>
<br>
The playback problem is strange because it affects 720p content more than 1080i
content.<br>
<br>
Quick recap:<o:p></o:p></p>
<div>
<p class=MsoNormal>Backend:<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Pentium 4 3Ghz<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>NOVA-T 500 tuner card<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Unfortunately no PCIe slot so I can't put in a VDPAU
capable card<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Frontend:<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>ASUS M3N-HDMI motherboard<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Athlon 6000 (dual core) CPU<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Built in NVIDIA 8300 graphics<o:p></o:p></p>
</div>
<p class=MsoNormal><br>
Both running Mythbuntu 8.10 with JYA's repositories<br>
<br>
<br>
Here are the symptoms - on the Frontend.<br>
<br>
Non VDPAU playback profile.<br>
<br>
No problem with TV1 and TV2 playback in fact a recording that shows pixelation
when using VDPAU does not have any pixelation during playback with this
profile.<br>
TV1 and TV2 (720p) playback has CPU usage around 62% but sometime over 90%<br>
TV3 (1080i) playback has CPU usage over 100% and stutters<br>
<br>
With VDPAU<br>
TV1 and TV2 show pixelation with panning shots and fast motion<br>
TV3 shows fine no pixelation<br>
<br>
OK so I have 2 possible solutions:<br>
<br>
1 change the settings so that VDPAU works for 720p content - I think the only
option I have is to change the deinterlacer. I have tried every deinterlacer
and that did not help <br>
<br>
2 use a profile that is non VDPAU for 720p and below and VDPAU for above. This
is working OK but I would really like to get my CPU usage down.<br>
<br>
So in summary if anyone has any clever ideas for improving VDPAU performance
with 720p content i would love to hear it.<br>
<br>
<o:p></o:p></p>
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<p class=MsoNormal><br>
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href="http://au.rd.yahoo.com/nz/mail/tagline/2009/mailsignup/*http:/yahoo.co.nz/mail">Switch
to Yahoo!Xtra Mail</a>, New Zealand's new email address.<o:p></o:p></p>
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