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<div class="moz-cite-prefix">On 11/08/2014 10:40 AM, Greg Grotsky
wrote:<br>
</div>
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cite="mid:CAKL4i_o5nb3PsW=Siwx3FeC0QL7AdYA3y9r3O+Gfi_EnuiSDdA@mail.gmail.com"
type="cite">
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<div class="gmail_extra">
<div class="gmail_quote">On Tue, Oct 30, 2012 at 9:57 AM,
Andre <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:mythtv-list@dinkum.org.uk" target="_blank">mythtv-list@dinkum.org.uk</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
<div>Yes, I have both a GT220 and an overclocked GT430 and
although generally the 430 gives slightly improved image
quality it does add a little stutter here and there, I
understand that the non overclocked ones are a lot
worse. The GT220 is smooth for 1080i50 & 1080i60
with Advanced 2x all of the time.<br>
<br>
I found that both cards had some stutter if the audio
buffers were not increased.<br>
>From my rc.local<br>
echo 3072 > /proc/asound/card0/pcm7p/sub0/prealloc<br>
<br>
This came from some postings by JYA and looking through
the frontend logs, other cards may have a slightly
different path but it appears in the logs if this is a
problem.<br>
</div>
</blockquote>
<div><br>
</div>
<div><br>
</div>
<div>Would you guys share what "timing method"
is being chosen by mythfrontend to playback videos? I have
a GT 430 and I've only ever been able to get it to use the
USleep or RTC methods. I am wondering if the GT 220 or one
of these fancy new cards like the <a
moz-do-not-send="true"
href="http://www.newegg.com/Product/Product.aspx?Item=N82E16814500353">GT
730</a>, <a moz-do-not-send="true"
href="http://www.newegg.com/Product/Product.aspx?Item=N82E16814500352">GT 720</a>,
or <a moz-do-not-send="true"
href="http://www.newegg.com/Product/Product.aspx?Item=N82E16814500346">GT
630</a> would work in DRM mode. </div>
<div><br>
</div>
<div>Here are examples of my logs showing the two methods:</div>
<div><br>
</div>
<div>2014-10-26 19:08:35.135915 E VSYNC: DRMVideoSync:
VBlank ioctl did not work, unimplemented in this driver?<br>
2014-10-26 19:08:35.135954 E VSYNC: RTCVideoSync: Could
not set RTC frequency:<br>
eno: Permission denied (13)<br>
2014-10-26 19:08:35.136377 I Player(0): Video timing
method: USleep with busy wait<br>
2014-10-26 19:08:35.136392 I Player(0): Display Refresh
Rate: 59.999 Video Frame Rate: 25.000<br>
2014-10-26 19:08:35.136401 I Player(0): SetFrameInterval
ps:1 scan:1</div>
<div><br>
</div>
<div>or</div>
<div><br>
</div>
<div>2014-10-28 07:05:16.991023 I VDPAU: Created 2 output
surfaces.<br>
2014-10-28 07:05:16.991062 I VDPAU: Created VDPAU render
device 1920x1080<br>
2014-10-28 07:05:17.007008 N Player(0): Forcing decode
extra audio option on (Video method requires it).<br>
2014-10-28 07:05:17.096562 I Player(0): Video timing
method: RTC</div>
<div><br>
</div>
<div>Anyway, I'm thinking about upgrading my 430 to one of
these newer cards to see if it'll play some of my video
library better but I can't really try it before I buy it.<br>
</div>
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<pre wrap="">_______________________________________________
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</pre>
</blockquote>
My only suggestion is to skip the 7xx cards for now. I tried a GT
730 card and the nvidia 304 driver does not support it. The 331
driver "does", but there is a bug in the vdpau library that causes
crashes with the 7xx cards. If you download the latest drivers from
nvidia, then things might be better, but the prepackaged Ubuntu
drivers do not (yet) support the GT 730 card.<br>
<br>
I am now using a GT 630 card (Asus GEFORCE GT 630, 384 cuda cores,
2GB DDR3 RAM). It is a low profile fanless card. I have never
gotten anything but the default usleep method to work. I have never
gotten tear free playback either, even with vdpau. This probably
has nothing to do with the card itself. Do note that there is more
than one GT 630 card. Some have more cuda cores and different clock
rates, so not all GT 630 cards are created equal. Just love
marketing.<br>
Jay<br>
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