[mythtv-users] Playing slightly jerky every now and then

[mmcconnell at uniserve.com]

720x568 & 7000 kbit's is a pretty good chunk of data! I suggest you take a peak 
at 'iostat' while watching livetv.

http://perso.wanadoo.fr/sebastien.godard/ (or apt-get install sysstat)
iostat 1

What kinda blocks written / read are you seeing?
Have you tuned your drives with hdparm?
Try renice: renice -16 -u mythtv

Mike


Quoting Thomas Börkel <thomas at boerkel.de>:

> HI!
> 
> When watching TV or a recording, I get a little bit of jerkyness every 
> now and then. Sometimes it's running perfect for a long time and 
> sometimes it's a little bit stuttering in scenes with motion, so it's 
> not always. Don't get me wrong, it's still watchable and the GF does not 
> even see it, but I find it a bit annoying.
> 
> I have already tried Jitter Reduction in the settings and played with 
> different bitrates. At the moment I am capturing:
> MPEG2, 720x568, 7000/8000 KBit, 50 Hz.
> 
> The TV-Out of the NVidia is also running at 50 Hz.
> 
> Hardware:
> - PVR-250
> - PVR-350 (not using TV-Out)
> - NVidia GeForce FX 5200 with TV-Out running at 800x600
> - Celeron 2.6 GHz
> - 512 MB RAM
> - Fedora Core 1
> 
> While playing, the CPU is at 25% usage. Capturing is 1%.
> 
> I have my MythTV setup with Jarod's guide. I am not using the latest 
> NVidia driver and not the latest PVR firmware.
> 
> Thanks for any hints.
> 
> Thomas
>