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<div><span class="gmail_quote">On 21/01/2008, <b class="gmail_sendername">Oliver Maunder</b> <<a href="mailto:mail@olivermaunder.co.uk">mail@olivermaunder.co.uk</a>> wrote:</span>
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<div class="gmail_quote"><span class="q">On Jan 21, 2008 9:54 AM, nospam312 <<a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:nospam312@gmail.com" target="_blank">nospam312@gmail.com</a>> wrote:
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<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">When I watch QVC (and other channels on this mux) I get very jerky or<br>stop start playback but other channels are generally fine.
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<div><br>This could be down to the bitrate allocated to the channels. According to Wikipedia ( <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://en.wikipedia.org/wiki/DVB-T_in_United_Kingdom" target="_blank">
http://en.wikipedia.org/wiki/DVB-T_in_United_Kingdom</a>) there are 19 channels broadcasting on MUX A but 5 TV channels on MUX 1 (plus a few radio channels). I've certainly noticed a big difference in picture quality watching QI on Dave and on BBC2.
<br><br>I've noticed some nasty artifacts with scrolling text - particularly horizontal scrolling credits. I assumed it was my deinterlace settings, but I haven't looked into it much. I'll take a look at News 24 and see if things are better there. Try using a different deinterlace method and see if things improve.
<br> </div></div><br>Olly<br><br><br>_______________________________________________<br>mythtv-users mailing list<br><a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:mythtv-users@mythtv.org">mythtv-users@mythtv.org
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<div>TIA: It sounds like your problem is down to bad reception I'm afraid. The fact that Mux A has more stations also means that it's less resilient to bad reception (less room for error correction). Check your aerial. Look into signal strengths etc.
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<div>Olly: Yes I've (and others) noticed some funny things with Channel 5 and interlacing. They seem to fiddle with the "interlaced" flag in the stream a lot sometimes getting it wrong (I think what they do is have the main part of the screen progressive and the scrolling ticker interlaced but only "detect" the progressive part). Even different scenes in programs flip between interlaced and progressive.
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<div>The result is interlace artifacts when they broadcast the wrong flag.</div>
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<div>Myth on my box definitely seems to be doing the right thing though (Five has got it wrong), as the same programs show exactly the same artifacts when I watch them on my Virgin cable box. Channel 5 news is especially bad.
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<div>Hope this helps.</div>
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<div>Cheers</div>
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<div>Steve<br> </div>