<div>I'm using an Analog V4l capture card, which is an Encore ENLTV-FM with chipset saa7134 (philips i think).</div><div>Audio out on the capture card goes to my sound card line in with a cable. Alsa is set to capture from line in, and line in is muted so it goes through mythtv.</div>
<div><br></div><div>If i start livetv and just watch, i don't see any new messages at the log. The sound just starts delaying gradually. If i check the recording later, it has the same delay, so it looks like the delay is being recorded, not just a problem at playing back.</div>
<div><br></div><div>Anyway, if the info helps, i can see some bad messages when changing channels. Like these:</div><div><i>----------------------------------------------------------------------</i></div><div><i>2010-01-22 15:23:01.711 WriteAudio: buffer underrun</i></div>
<div><i>2010-01-22 15:23:07.495 WriteAudio: buffer underrun</i></div><div><i>2010-01-22 15:23:07.735 NVP(0): prebuffering pause</i></div><div><i>----------------------------------------------------------------------</i></div>
<div><br></div><div>So, when i change channels, i get these messages, the video starts showing but the audio starts 1 or 2 seconds later, and late. </div><div>Maybe this problem is related with the gradual delay, and changing channels just makes it stall. But again, it happens gradually too without touching anything and without any message.</div>
<div><br></div><div>Thanks,</div><div>Sergio.</div><div><br></div><div><br></div><br><div class="gmail_quote">On Fri, Jan 22, 2010 at 2:27 PM, Nick Morrott <span dir="ltr"><<a href="mailto:knowledgejunkie@gmail.com">knowledgejunkie@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">2010/1/22 Sergio Tashdjian <<a href="mailto:gtashi@gmail.com">gtashi@gmail.com</a>>:<br>
<div><div></div><div class="h5">> Hi guys, i've been googling and reading lots of posts trying to solve this<br>
> problem, but no luck so far.<br>
> I have mythtv installed in Ubuntu 9.10 (Karmic Koala) using the package<br>
> provided in the Ubuntu repository.<br>
> Mythtv version there is .22<br>
> My problem is that audio/video sync starts ok , but sound gets delayed<br>
> gradually, more and more. After an hour watching tv or recording a show the<br>
> delay in sound may reach more than 5 seconds.<br>
> Im runing backend and frontend on the same Core 2 Duo PC with 2 GB ram. CPU2<br>
> shows high usage when watching tv, but CPU1 is almost free.<br>
> I don't see any video or audio jumps , nor quality problems, it looks and<br>
> sounds perfectly, except for the growing sync loose.<br>
<br>
</div></div>What type of capture card are you using? Do you see any<br>
audio/video/sync messages in your mythfrontend logfile?<br>
<br>
Nick<br>
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