[mythtv-users] PVR 350 TV Out Closed Caption and CPU Usage

[Rajeev Goonewardene]

Hello All,

I have MythTV (0.20 - latest from atrpms) setup on a Fedora Core 5  
(Celeron 2.8Ghz/512 MB Ram).  I have 2 capture cards, a PVR 350 and a  
PVR 150.  Everything with recording and playback works fine.  I have  
two issues that I have seen on many newsgroups but not found an  
answer to.

1.  I noticed that the CPU usage of mythfrontend is around 40% to 50%  
when playing back a recording or watching live tv however when I turn  
on the program guide (which is transparent so I can see the tv  
program behind it) - the CPU usage is around 2%. Does anyone have any  
idea about this one ?  This is similar to the post:
http://mythtv.org/pipermail/mythtv-dev/2006-September/050963.html

2.  I was trying to get closed captioning passing through the pvr  
350's TV out so that my television's closed captioning can read it - 
In mythtvsetup->General, I set the vbi format to ntsc and ensured  
that both cards were able to read the captions using the vbi tool  
zvbi-ntsc-cc  from the ivtv site (they both worked).  Then I ran the  
'ivtvctl  --device=/dev/video0 -w cc' (video0 is my pvr 350) command  
and sure enough when I started watching TV - the captions showed up  
but they were garbled (writing on top of each other and weird colors  
too)... Here's the funny thing, much like my problem above (1) - when  
I turn on the program guide, the captions are perfect!

Could anyone shed any light for me on these issues ?


Thank You,

Rajeev.