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On 10/03/2010 09:27 AM, Brian Wood wrote:
<blockquote cite="mid:201010030827.10820.beww@beww.org" type="cite">
<pre wrap="">On Sunday, October 03, 2010 08:12:24 am Marc Williams wrote:
</pre>
<blockquote type="cite">
<pre wrap=""> I'm a fairly new Myth user in the US. I've set up a separate backend
and frontend to go along with my dual tuner HDHomeRun. It all works
quite well and am so far quite impressed.
But just in the past couple days something odd has happened to my ABC
affiliate channel. Even though the signal strength is at or close to
100%, the picture is all jerky and is not sync'ed at all (not even
close) to the audio. When I feed the signal directly to the TV it's
fine so I don't think it's a bad signal. I've bounced all devices and
I've deleted and rescanned all the channels (about 25 of them) but the
problem remains with just that one channel.
Any ideas or troubleshooting tips would be most welcome. Thanks!
</pre>
</blockquote>
<pre wrap="">
Just some ideas:
Make sure that when you check with your TV set you are using the exact same cable that feeds your HDHR, using the same
splitters, cable, fittings etc.
See if the problem exists with both HDHR tuners.
Signal strength itself often means nothing, you could have multi-path problems resulting in plenty of signal, but it's
unusable due to the multiple paths. It's the BER (bit error rate) or "symbol quality" that actually means something.
Are all your stations coming from the same transmitter site? If the ABC station is significantly closer or farther away, it
might explain the different performance, though of course that probably hasn't changed in the past couple of days (though
you never know).
Look for anything that has changed in the "past couple of days", a building going up, trees planted and the like. It's
autumn, and leaves are falling, but that usually improves things.
An email to the station's engineering department (usually listed on their web site), asking (in a cordial manner of
course) if anything has changed, couldn't hurt.
The above assumes you are receiving the channels off the air, if they are cable QAM then you might contact the cable
company (and you would be extremely lucky to get 25 clear QAM channels).
</pre>
</blockquote>
<br>
To anyone who also may have been running into problems with KSTP and
stumbles across this thread:<br>
<br>
When searching for an answer to my issues I found this thread:<br>
<a href="http://www.gossamer-threads.com/lists/mythtv/users/455048"
target="_blank">http://www.gossamer-threads.com/list...v/users/455048</a><br>
<br>
It detailed why we were having problems with just that channel.
Short answer: KSTP's new encoder broke things. When the debug logs
were presented to the myth devs they wrote a workaround and
committed it. I waited a day until those fixes would show up in the
Mythbuntu daily AutoBuilds and applied it from there. Works great.<br>
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