[streaming] video corruption??

[Anthony Benjammin DeNardo III]

I am streaming 5 channels to our campus using VLC.  the signal comes 
from DirecTV, which comes out of the DirecTV receiver via composite 
video (RedWhiteYellow) and plugs into a Hauppaugue encoder.  VLC 
captures this video and multicasts it.  once in a while (intermittent 
problems are the toughest, eh?) the top 1/8 of a channel gets 
"corrupted".  by "corrupted" I mean that it is still viewable, but 
obviously not normal.  it is like the top 1/8 of the picture is made up 
of 16 blocks, all in the wrong place.  the rest of the video, remains fine.

to cure this problem, I only need to stop and restart the vlc stream. 

my question is twofold:

1)  what might be causing this corruption?  I don't see anything in 
/var/log/messages nor stdout.
2)  how can I make my system more resillient?  is there a way to detect 
such corruption automatically, at which point I could have the system 
kill & restart the stream?

thanks in advance!
ad3

-- 
=========================================================
| Anthony Ben'jammin' DeNardo III                       |
| Network Multimedia Architect                          |
| Academic Computing & Networking Services              |
| Colorado State University                             |
| 970-297-3710                                          |
| ad3 at ColoState.EDU                                     |
========================================================= 

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