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At 6/18/2007 - 08:58 AM, you wrote:<br>
<blockquote type=cite class=cite cite="">
<font face="Arial, Helvetica" size=2 color="#0000FF">Does is jitter if
played outside myth? Is XV enabled on your video card? Does
Xine play it ok?<br>
</font> <br>
<font face="Arial, Helvetica" size=2 color="#0000FF">If the video encoded
ok? (Have you played it back on another machine)?<br>
</font><br>
<hr>
<font face="Tahoma" size=2><b>From:</b> mythtv-users-bounces@mythtv.org
[<a href="mailto:mythtv-users-bounces@mythtv.org" eudora="autourl">
mailto:mythtv-users-bounces@mythtv.org</a>] <b>On Behalf Of </b>Aaron
Nauman<br>
<b>Sent:</b> Sunday, June 17, 2007 10:44 PM<br>
<b>To:</b> Discussion about mythtv<br>
<b>Subject:</b> Re: [mythtv-users] ivtv capture is good, but mythtv hoses
it<br>
</font><br>
On 6/17/07, <b>Brian Wood</b>
<<a href="mailto:beww@beww.org">beww@beww.org</a>> wrote: <br>
<dl>
<dd>Aaron Nauman wrote:<br>
<dd>>> > > I am running ivtv 0.10.3 on PVR 350 and PVR 150 on
fc6 2.6.20. If<br>
<dd>> I run a<br>
<dd>>> > > capture test with cat<br>
<dd>>> > ><br>
<dd>>> > > cat /dev/video1 > test.mpg<br>
<dd>>> > ><br>
<dd>>> > > The capture looks great. If I start mythtv
and watch live tv, I<br>
<dd>> get jitter.<br>
<dd>>> > > Every couple of seconds the video pauses for
a second of so. <br>
<dd>>> ><br>
<dd>>> > In MythTV, what resolution/bitrate do you have
set for your LiveTV<br>
<dd>>> > profile for MPEG2 Hardware Encoders? If you
change the resolution for<br>
<dd>>> > LiveTV to 720x480 do things improve? <br>
<dd>>><br>
<dd>>> Thanks for the reply Nick.<br>
<dd>>><br>
<dd>>> I am running with the default settings: 480 x 480 with 368K
bitrate.<br>
<dd>> I tried 720 x 480 and get no improvement.<br>
<dd>>><br>
<dd>>> I have tested my hard drive and it is getting good
throughput. Any <br>
<dd>> other ideas?<br>
<dd>>><br>
<dd>>> Thanks,<br>
<dd>>> Aaron<br>
<dd>><br>
<dd>> I have tried changing the resolution and bitrate settings
around, with<br>
<dd>> no improvement.<br>
<dd>> I am getting some "NVP: prebuffering pause" messages.
<br>
<dd>> I tried output through PVR-350, but still have the jitter, so I
am<br>
<dd>> pretty sure it is on capture.<br>
<dd>><br>
<dd>> I have read through the troubleshooting sections on ivtv and
mythtv and<br>
<dd>> everything else I can find with google and haven't found
anything that <br>
<dd>> makes a difference. And that includes rebuilding the
machine from<br>
<dd>> scratch. I am really worried that I am going to have an
expensive<br>
<dd>> doorstop on my hands, unless someone can help get me on the
right track. <br>
<dd>><br>
<dd>> Any thoughts anyone?<br><br>
<dd>What sort of system? Myth puts a significant load on system
resources,<br>
<dd>if you have an underpowered CPU it might work fine running a cat
command<br>
<dd>but fall on its knees running Myth. <br><br>
</dl><br>
<dl>
<dd>What CPU and what load running Myth? Are you running X and all
graphical <br>
<dd>stuff when you run your cat command? Is your RAM limited, ie"
are you<br>
<dd>swapping when running Myth but not when running the cat?<br><br>
</dl><br>
I don't think it is a performance issue. I have had myth running on
this machine with no jitter problems with ubuntu. I was having
stability and lirc problems with Ubuntu and Jarod's howto is so nice,
that I switched to Fedora. <br><br>
The machine has<br>
Sempron 3400+ (2 GHz)<br>
2 GB RAM<br><br>
There is basically nothing running on the machine other than KDE that is
resource intensive. No swapping happening while watching live TV,
but jitter is there. <br><br>
What I find confusing is that capture with cat jitters after exiting
myth. I seems that this would point to the problem. I just don't
know enough about this stuff to figure it out.<br><br>
Thanks,<br>
Aaron<br>
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<br><br>
Have you looked at cpu usage -- Top,<br>
I have the same issue on 1 machine, with xorg hogging the cpu..<br>
I DON"T have an answer yet.<br><br>
mike g.<br><br>
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