<div><span class="gmail_quote">On 11/2/07, <b class="gmail_sendername">Alan Calvert</b> <<a href="mailto:cal@graggrag.com">cal@graggrag.com</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Having put together a modest little SD system for the grandkids, largely<br>from the spare parts pile, there's this one little problem. Audio gradually
<br>drifts out of synch, -200ms over ten minutes or so. I might have imagined it,<br>but I swear it drifted back toward centre over a further period.<br><br>I've searched on a few things, but can't establish if this is a known
<br>weakness of v4l in general, or more likely the saa7134 in particular.<br><br>I'd love to know why it's happening, so any suggestions are welcome.<br><br>cheers.<br>_______________________________________________
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</a><br></blockquote></div><br>Not a v4l expert at all, but since this is a framegrabber, could it be that the CPU is overwhelmed with all the processing? Have you tried tweaking the parameters for capture (changing the encoding types, not encoding the audio, etc.). I know that on my card that uses the saa7134, I've had some issues with the audio when recording SD (mostly with it dropping completely) and then sometimes the close captioning gets jacked (which is really bad when the audio drops).