[mythtvnz] Pixellation Every ~ 20 minutes

[Paulgir]

On Thu, 04 Oct 2012 20:06:42 +1300, Curtis Walker <sultanoswing at gmail.com>  
wrote:

> Odd problem this.
> On all TV recordings, after around 20 minutes, the picture starts  
> becoming pixellated. Over the next 30 or so >seconds it becomes more and  
> more pixellated until it looks like an impressionist painting. The sound  
> is generally >OK, but does have the odd, brief "glitch" (a noise like a  
> modem negotiating). After no more than a minute, the >picture and sound  
> suddenly return to normal.
>
> I'm fairly sure this is not a reception issue, since it seems to occur  
> so regularly, and at roughly the same time >in each recording, and for  
> the rest of the recording picture and sound are perfect. Signal strength  
> and SNR are >fine (98% and 2.3dB respectively, and this is  
> representative). Same thing occurs on all channels.
>
> It doesn't appear to be related to the playback, as the same pixellation  
> occurs in the same place whether viewing >the recording on desktop  
> (nvidia) or Laptop (intel integrated), although it sounds similar to  
> symptoms reported by >others on mythtv <0.25 which people ascribed to  
> vdpau and buffer settings.
>
> Could be some scheduled process is running every 20 minutes or so on my  
> disks? Although why it occurs ~20 minutes >into a recording, and never  
> at other times, doesn't seem to fit with this either.
>
> Hmmmm ....

I've seen the same thing since I built my HTPC in January.I always assumed  
it was a signal related problem as I am in a fringe area and I thought I  
got an improvement with a better antenna.Ive had it with 0.24 and 0.25 +  
fixes.
I'm very interested to see if it turns out to be from some another cause.

Cheers -Paul



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