[mythtv-users] Remote Mythfrontend Problem
mythtv at stephen-milner.me.uk
Wed Jul 15 10:45:13 UTC 2009
Thanks for the quick reply Nick
On 15/07/09 11:02, Nick Morrott wrote:
> Those problems still look like being due to a poor quality TV signal.
> Absolute signal strength is not the best artiber of whether you'll
> have a perfect picture. If you run Kaffeine instead of MythTV, do you
> still see vidoe and audio glitches? We need to try and determine where
> the issue lies.
I have very little experience with Kaffeine, but I will try to inhale
some knowledge to see if I can get it working. The tip that signal
strength may not be indicator of perfect picture is worth of note. I
doubt this is relevant, but I will mention it.
Is it possible the signal is too strong. I live about 8 miles away from
Emly Moor, up on a hill near Holme Moss and I have line of sight to the
transmitter. I live in a conservation village and I have to the aerial
inside the loft, so I bought a very big one (The signal is split with a
passive splitter) but on the original aerial it was quite a small one
(also in the loft)
> Running MythTV, can you watch LiveTV on the backend system _and_ the
> frontend system and do you get the same problems?
I have not tried this experiment. The new location for the backend is
headless. I will lug a monitor up there tonight and see what the quality
is like. It will be difficult for me to examine both at the same time
since they are physically in differing locations in the house but I can
make a general comparison one after the other.
> Does the LiveTV OSD
> give you a high bit error ratio figure (BER) whilst tuning?
That's interesting. How do I get that displayed?
> Do you see
> lots of mpeg2video errors in the frontend logfiles when playing a
> recording or LiveTV session where you see picture breakup and audio
> glitches? These can all be indications of poor signal strength.
> Errors may be like:
> 2009-07-15 08:16:45.602 [mpeg2video @ 0x5a3c7b0]ac-tex damaged at 29 25
I don't seem to have any frontend log, but I guess if I start
mythfrontend from the command line there will be an option to switch on
> Finally, do you have problems on all channels, or only those on
> particular muxes (a breakdown of channels per mux can be found at
Now this is very interesting. My experiences would suggest that some
channels suffer less than others. but I would need to do more
experimentation. Last night I was getting the problems watching Rambo II
on ITV4 with a quoted signal strength of 72%
I'll do some more experiments tonight and get back with the results.
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