Thanks for your advice. With your first point, I still don't see why I should have problems with even a very 'demanding' playback. I have a dual-core 6000+ processor (with 64-bit Ubuntu) and I also have 6 GB of RAM installed besides running 2 8600GT graphic cards in SLI. My system is I believe quite powerful enough. I must say though that I only have a 19-inch monitor. Would that make a difference? Like I said, with Windows the hardware works without problems.<div>
<br></div><div>With your second point, I will look into this. I will build a partition exclusively for MythTV live and recordings. I forgot to mention that currently my Live TV is on an LVM volume. It is a separate LVM partition but it is in the same physical volume group as my OS/MySQL. That could affect playback. Could you give me advice on how to copy this partition to a separate partition? I have already recorded stuff I don't want to lose.</div>
<div><br></div><div>Thanks</div><div><br></div><div>Danny</div><div><br><div class="gmail_quote">On Mon, Jul 13, 2009 at 2:47 PM, <span dir="ltr"><<a href="mailto:mythtv@derdev.com">mythtv@derdev.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Simplest observations a Myth noob can offer:<br>
<br>
1) There are various resolutions of HD broadcast output quality, so some<br>
stations are simply more "demanding" for playback than others...<br>
Shouldn't make a difference in general, but if you're on the margin, then<br>
my (limited) experience is that the most intense HD programming will tip<br>
the balance.<br>
<br>
2) I also took to heart the forum advice that you should use a separate<br>
disk for "watch live TV" storage from your OS/MySQL db. I found that once<br>
I moved my live tv storage volume to another disk, that greatly improved<br>
stutter and other artifacts in playback. This is a mythbackend setting.<br>
<div><div></div><div class="h5"><br>
<br>
<br>
<br>
> I've been trying to find a solution to my MythTV problem. I have combed<br>
> the forums and although I found that some users have a similar problem, I<br>
> haven't found a satisfactory solution. The problem is this: on some<br>
> channels<br>
> like Channels 3 and 4, I get terribly bad stuttering playback of Live TV.<br>
> However this doesn't happen with other channels like the BBC which play<br>
> fine, quite good actually. I don't understand while a few channels stutter<br>
> while most don't.<br>
><br>
> I have an AMD64 Dual Core, with dual SLI 8600GT Nvidia cards and a<br>
> Hauppauge HVR 3000 TV Card. I use the Nvidia VDPAU encoder although I've<br>
> tried different settings to the encoder to find solution to my problem.<br>
> Using mythtv -v playback I get messages such as ac-tex being<br>
> damaged, MPEG motion out of boundary, and NVP: video frames behind audio.<br>
> I've also tried different settings in the frontend but problem persist.<br>
> I'm<br>
> sure the problem is not hardware because I dual-boot with Windows and<br>
> using<br>
> Hauppauge propriety package I can watch Live TV there without any problem.<br>
> From the forums my intuition tells me it might have something to do with<br>
> i2c. I don't know anything about i2c and I'm not sure how this relates to<br>
> MythTV or to Hauppauge driver modules. An explanation would be great. I<br>
> also<br>
> suspect that for the channels that don't work, they use the same<br>
> transcoder<br>
> and I might have a missing codec.<br>
><br>
> I'd like to add that I'm very new with Linux and MythTV. I really like<br>
> using<br>
> them both so a much like for me would be highly appreciated.<br>
><br>
> Danny<br>
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</blockquote></div><br></div>